JP4298681B2 - Optical connection unit - Google Patents

Description

  The present invention relates to an optical connection unit that connects an optical fiber of an optical fiber cable to another optical fiber in a switchable manner.

In order to connect the optical fiber cable so that it can be switched in the optical connection unit, in general, the optical fiber cable is drawn into the optical connection unit and fixed, and the optical fiber exposed at the tip of the optical fiber cable (external side light) Fiber) to the termination optical fiber.
The optical connector plug assembled at the end of the termination optical fiber is connected to an optical connector adapter arranged in the optical connection unit. Thereby, the outside line side optical fiber is matched with one of the optical connector adapters via the termination optical fiber.
In order to connect another optical fiber (for example, an optical fiber cord connected to an intra-station device such as a transmission device) to the outside optical fiber, an optical connector plug provided at the tip of the other optical fiber is connected to the optical fiber. It connects with a connector adapter (for example, refer patent document 1).
In the optical connection unit, it is necessary to switch the connection of the optical fiber when the number of subscribers increases or decreases, or when the equipment is broken down. Therefore, clear identification is essential for the optical fiber wiring.
Japanese Patent No. 3173980

In the optical connection unit, the outside optical fiber and the other optical fiber are wired in different directions for convenience of maintenance. In general, the outside optical fiber and the other optical fiber are wired in one direction and the other direction of the optical connection unit, respectively.
As described above, when the wiring direction of the outer-side optical fiber and the other optical fiber is limited to a specific direction, it is necessary to avoid the interference and clearly identify them.
This invention is made | formed in view of the said situation, Comprising: It aims at providing the optical connection unit which can prevent that an outside line side optical fiber and said other optical fiber interfere.

The invention according to claim 1 of the present invention is an optical connection unit that connects an external line side optical fiber in a switchable manner with another optical fiber via a termination optical fiber that can be connected to a connector. An optical connector array unit in which a plurality of optical connector to which the optical fiber for connecting the optical fiber for termination is connected and the optical connector for optical fiber for termination are arranged in the rack And an outer optical fiber guide body for guiding the outer optical fiber, and the connecting unit housing unit is provided on one side of the terminating optical fiber introduction part and on the other side. was a external side optical fiber introducing section, into the rack, the unit housing area where the connecting portion housing unit is housed, the external line side optical fiber and another optical fiber below the unit housing area Line possible and optical fiber wiring region is secured, the optical connector array unit, in said rack is provided above the unit housing area, the external line side optical fiber guide body, one side of the optical connection unit toward the other side from the part, it said an optical connection unit the external optical fiber from the optical fiber wiring region is to be able to guide the said unit storage area.
The invention according to claim 2 of the present invention is the optical connection unit according to claim 1, wherein the outer line side optical fiber guide body is formed in a tubular shape through which the outer line side optical fiber is inserted.
The invention according to claim 3 of the present invention is the optical connection unit according to claim 2, wherein the outside-line side optical fiber guide body is a corrugated tube.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the optical connector array portion is configured to be able to connect the other optical fiber from the front, and the outer line side optical fiber. The guide body is an optical connection unit that can guide the optical fiber on the outside line via the rear of the connection unit storage unit.

Since the optical connection unit of the present invention includes the outer line side optical fiber guide body that guides the outer line side optical fiber from one side part toward the other side part, the outer line side light introduced from one side part. The fiber can be guided to the outside line side optical fiber introduction part provided on the other side part of the connection part housing unit.
As described above, since the position of the wiring of the outer line side optical fiber can be regulated by the outer line side optical fiber guide body, the outer line side optical fiber interferes with another optical fiber wired on the other side. Can be prevented.
Further, in the case where the outer line side optical fiber is introduced into the optical connection unit from the other side part, the outer line side optical fiber is introduced as it is from the other side part into the connection part housing unit. For this reason, it can prevent that an outside line side optical fiber and the other optical fiber wired by one side part interfere.

  FIG. 1 is a front view showing an example of the optical connection unit of the present invention. FIG. 2 is a plan view showing the internal structure of the optical connection unit shown in FIG. FIG. 3 is a plan view showing a cross section taken along line AA of the optical connection unit shown in FIG. FIG. 4 is a plan view illustrating a state in which the connection unit storage tray is pulled out in the optical connection unit illustrated in FIG. 1. FIG. 5 is a side view showing a cross section taken along line BB of the optical connection unit shown in FIG. 6 is a plan view showing a cross section taken along line AA of the optical connection unit shown in FIG.

As shown in FIGS. 1 to 5, the optical connection unit 1 includes a rack 2, a connection portion storage unit 3, an optical connector array portion 4, an outer line side optical fiber guide tube 5 (outer line side optical fiber guide body), and It has. Hereinafter, the lower part in FIG. 2 may be referred to as the front and the upper part may be referred to as the rear.
The rack 2 is constructed between a bottom plate 11, side plates 12a and 12b provided on both side edges 11a and 11b, a back plate 13 provided on a rear edge 11c of the bottom plate 11, and side plates 12a and 12b. A shelf plate 14 and a support plate 15 formed thereon are provided.

As shown in FIG. 1, the shelf plate 14 is substantially parallel to the bottom plate 11, and is provided above the bottom plate 11 and spaced from the bottom plate 11.
As shown in FIG. 3, the shelf plate 14 is formed with a notch 14 a through which the outer line side optical fiber guide tube 5 can pass. The notch 14a is formed on one side of the shelf board 14 (upper right part in FIG. 3).
As shown in FIG. 1, the space between the shelf plate 14 and the bottom plate 11 is wired with an outside optical fiber 6 and an optical fiber 42 (other optical fiber) that are optical fibers on the outside optical fiber cable side. This is an optical fiber wiring region 16.

As shown in FIG. 1, the support plate 15 is substantially parallel to the shelf plate 14, and is provided above the shelf plate 14 and spaced from the shelf plate 14.
As shown in FIG. 2, the support plate 15 is formed with a notch 15 a through which the terminating optical fiber 8 can pass. The notch 15a is formed on one side of the support plate 15 (upper right part in FIG. 2).
As shown in FIG. 1, the space between the support plate 15 and the shelf plate 14 is a unit storage area 17 in which the connection unit storage unit 3 can be stored.
The rack 2 is preferably made of a plate material such as a stainless steel plate or a steel plate.

As shown in FIG. 4, the connection portion storage unit 3 includes a frame body 21 and a connection portion storage tray 22 that is housed in the frame body 21 so as to be able to be taken in and out.
The connection unit storage tray 22 includes a tray body 23, optical fiber guides 24 to 27, a fusion splicing unit holding unit 28, a termination optical fiber introduction unit 29, and an outside line side optical fiber introduction unit 30. Yes.

The fusion splicing part holding part 28 accommodates the fusion splicing part 40 between the optical fiber 7 drawn from the distal end of the outer line side optical fiber 6 and the optical fiber 9 drawn from the terminating optical fiber 8. It has become.
The termination optical fiber introduction portion 29 is formed on one side (the right portion in FIG. 4) of the connection portion storage tray 22.
The outside line side optical fiber introduction part 30 is formed on the other side part (left part in FIG. 4) of the connection part storage tray 22.
As shown in FIGS. 3 and 4, the connection portion storage tray 22 can be drawn forward from the frame body 21.
The connection unit storage unit 3 preferably has a configuration in which a plurality of connection unit storage trays 22 are vertically stacked in the frame body 21.

As shown in FIG. 1, the optical connector array portion 4 is a frame-shaped frame 31 formed at the front portion of the rack 2, and a plurality of optical connector adapters 32 are mounted on the support plate 15. Yes.
As shown in FIGS. 2 and 5, the optical connector adapter 32 can connect the optical connector plug 33 assembled at the tip of the optical fiber 41 drawn from the termination optical fiber 8 from the rear. It has become.

As the optical connector adapter 32, an optical connector plug 33 that can be connected to the optical connector plug 43 and the optical connector plug 43 at the tip of the office inner optical fiber 42 is adopted.
The optical connector adapter 32 can connect the optical connector plug 43 from the front.
Specific examples of the optical connector include, for example, an SC type optical connector (Single fiber Coupling optical fiber connector) defined in JIS C 5973 and an MU type optical connector (Miniature-Unit coupling optical fiber connector) defined in JIS C 5983. ) And the like.

By connecting the optical connector plug 33 to the optical connector adapter 32, the outer line side optical fiber 6 can be terminated so as to be connectable to the station inner side optical fiber 42.
The station inner optical fiber 42 is a device-side optical fiber connected to an intra-station device such as a transmission device. For example, an optical fiber cord or an optical fiber core can be used.

As shown in FIGS. 1 and 3 to 5, an outer line side optical fiber guide tube 5 is provided on the bottom plate 11.
The outer line side optical fiber guide tube 5 is for guiding the outer line side optical fiber 6, and a tubular body made of synthetic resin or metal can be used. By using the outer side optical fiber guide tube 5, the wiring position of the outer side optical fiber 6 can be accurately determined.
The outer line side optical fiber guide tube 5 is preferably flexible so that its direction can be arbitrarily set. In particular, a corrugated tube having annular or spiral irregularities arranged at a predetermined interval or pitch along the axial direction is preferable because it has excellent flexibility and sufficient strength.

One end portion 5a of the outside-side optical fiber guide tube 5 is disposed on one side portion of the rack 2 (the right side portion in FIGS. 1 and 3). In the illustrated example, the one end portion 5 a of the outer line side optical fiber guide tube 5 is disposed in the vicinity of one side edge 11 a of the bottom plate 11.
The outer line side optical fiber guide tube 5 extends toward the back plate 13 while curving from the one end portion 5a toward the other side plate 12b (left side in FIGS. 1 and 3), and passes through the notch 14a. It reaches on the plate 14 and reaches the rear of the connecting portion storage unit 3. The other end portion 5b of the outer line side optical fiber guide tube 5 is located in the vicinity of the center of the back plate 13 in the width direction (the left-right direction in FIGS. 1 and 3).

In the optical connection unit 1, the following two types of wiring are possible.
(1) When the outside line side optical fiber 6 is introduced into the optical connection unit 1 from one side part (the right side part in FIG. 3) As shown in FIG. 3, the outside line side optical fiber 6 is composed of the optical connection unit 1. It is introduced into the outside line side optical fiber guide tube 5 from one end portion 5a arranged on one side portion (right side portion in FIG. 3). The outer line side optical fiber 6 can be wired so as to be fed into the outer line side optical fiber guide tube 5 from the one end portion 5a.
The outer-side optical fiber 6 extends toward the other side (left side in FIG. 3) through the other end 5b positioned behind the connection portion storage unit 3, and extends to the side of the connection portion storage unit 3 (see FIG. 3 (left side in FIG. 3), and is introduced into the connection portion storage tray 22 from the outer-line-side optical fiber introduction portion 30 provided in the left portion of the connection portion storage tray 22.

As shown in FIG. 4, the optical fiber 7 separated from the tip of the outer optical fiber 6 is fused and connected to the optical fiber 9 separated from one end of the terminating optical fiber 8. The fusion splicing part 40 between the optical fiber 7 and the optical fiber 9 is held by the fusion splicing part holding part 28.
The optical fiber 7 and the optical fiber 9 may be connected by a method other than fusion, for example, mechanical splice connection.
The extra length of the optical fiber 7 can be processed along the optical fiber guides 24, 25. The extra length of the optical fiber 9 can be processed along the optical fiber guides 26, 27.

As shown in FIGS. 2 and 5, the optical fiber 41 separated from the other end side of the termination optical fiber 8 is connected to the optical connector adapter 32 of the optical connector array unit 4 via the optical connector plug 33. Connected.
In addition, the outer side optical fiber 6 and the termination optical fiber 8 can be collectively referred to as an optical fiber with an optical connector.

  As shown in FIGS. 1 and 2, the optical fiber adapter 42 is switchably connected to the optical connector adapter 32. The station inner optical fiber 42 is wired on the bottom plate 11 and led out to the outside from the other side portion (left side portion in FIG. 2) of the optical connection unit 1. In the illustrated example, the local optical fiber 42 is led out through the optical fiber wiring region 16 which is a space between the bottom plate 11 and the shelf plate 14.

(2) When the outside line side optical fiber 6 is introduced into the optical connection unit 1 from the other side part (left side part in FIG. 6) As shown in FIG. 6, the outside line side optical fiber 6 is composed of the optical connection unit 1. It is introduced onto the bottom plate 11 from the other side (the left side in FIG. 6), reaches the shelf plate 14 through the optical fiber wiring region 16, and is introduced from the outside-side optical fiber introduction portion 30 to the connection portion storage tray 22. .
Reference numeral 18 denotes an extra length portion of the outer line side optical fiber 6.
The office inner optical fiber 42 is wired on the bottom plate 11 and led out from one side (right side in FIG. 6) of the optical connection unit 1. In the illustrated example, the local optical fiber 42 is led out through the optical fiber wiring region 16 which is a space between the bottom plate 11 and the shelf plate 14.

  Thus, in the optical connection unit 1, two types of wiring are possible, and in either case, the outer line side optical fiber 6 and the station inner side optical fiber 42 are divided into left and right.

The optical connection unit 1 includes an outer line side optical fiber guide tube 5 that guides the outer line side optical fiber 6 from one side part (right side part in FIG. 3) toward the other side part (left side part in FIG. 3). Therefore, the external line side optical fiber 6 introduced from one side part can be guided to the external line side optical fiber introduction part 30 provided in the other side part of the connection part accommodation unit 3.
Thus, since the wiring position of the outside line side optical fiber 6 can be regulated by the outside line side optical fiber guide tube 5, the outside line side optical fiber 6 and the station inner side optical fiber 42 wired on the other side part are provided. Can be prevented from interfering.
In addition, when the outside line side optical fiber 6 is introduced into the optical connection unit 1 from the other side part (left side part in FIG. 6), the outside line side optical fiber 6 is connected to the connection part housing unit 3 from the other side part. It is introduced as it is.
For this reason, it is possible to prevent the outside optical fiber 6 from interfering with the local optical fiber 42 wired on one side (the right side in FIG. 6).

  The optical connector array unit 4 is configured to connect the office inner optical fiber 42 from the front, and the outer line side optical fiber guide tube 5 passes the outer line side optical fiber 6 via the rear of the connection unit housing unit 3. Since it can be guided, the wiring positions of the outer-side optical fiber 6 and the local-side optical fiber 42 can be separated so that they do not interfere with each other.

  In the illustrated example, the optical connection unit including the outer line side optical fiber guide tube 5 is illustrated, but the outer line side optical fiber guide body that can be used in the present invention is not limited thereto. For example, a plurality of annular guide bodies through which the outer line side optical fiber is inserted may be used, or a plurality of guide bodies that sandwich the outer line side optical fiber may be used.

It is a front view which shows an example of the optical connection unit of this invention. It is a top view which shows the internal structure of the optical connection unit shown in FIG. It is a figure which shows the cross section which follows the AA line of the optical connection unit shown in FIG. FIG. 2 is a plan view showing a state in which a connection unit storage tray is pulled out in the optical connection unit shown in FIG. 1. It is a side view which shows the cross section which follows the BB line of the optical connection unit shown in FIG. It is a top view which shows the cross section along the AA of the optical connection unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical connection unit, 3 ... Connection part accommodation unit, 4 ... Optical connector arrangement | positioning part, 5 ... Outer side optical fiber guide tube (outer side optical fiber guide body), 6 ... Outer side optical fiber, 8 ... Termination light Fiber: 29 ... Termination optical fiber introduction part, 30 ... Outer line side optical fiber introduction part, 40 ... Fusion splicing part, 42 ... Station inner side optical fiber (other optical fiber).

Claims (4)

An optical connection unit that connects the outer line side optical fiber (6) to another optical fiber (42) in a switchable manner through a termination optical fiber (8) that can be connected to a connector,
In the rack (2), a connection portion storage unit (3) for storing the connection portion (40) between the outer-line side optical fiber and the termination optical fiber, and an optical connector to which the termination optical fiber is connected ( 32) a plurality of optical connector arrangement parts (4) arranged, and an outer line side optical fiber guide body (5) for guiding the outer line side optical fiber,
The connection unit storage unit includes a termination optical fiber introduction part (29) provided on one side part, and an outside-line side optical fiber introduction part (30) provided on the other side part,
A unit storage area (17) in which the connection unit storage unit is stored in the rack, and an optical fiber wiring area (16) in which the outside optical fiber and other optical fibers can be routed below the unit storage area. And are secured,
The optical connector array portion is provided above the unit storage area in the rack,
The external line side optical fiber guide body, toward one of the sides other side of the optical connection unit, to be able to guide the external line side optical fiber from the optical fiber wiring region in the unit storage area An optical connection unit characterized by that.   The optical connection unit according to claim 1, wherein the outer line side optical fiber guide body is formed in a tubular shape through which the outer line side optical fiber is inserted.   The optical connection unit according to claim 2, wherein the outer line side optical fiber guide body is formed of a corrugated tube. The optical connector array is configured to connect the other optical fiber from the front,
The said outside line side optical fiber guide body can guide an outside line side optical fiber via the back of a connection part storage unit, The any one of Claims 1-3 characterized by the above-mentioned. The optical connection unit according to item.

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