JP2000275447A - Optical branching unit and light distribution panel with optical branching unit mounted thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and economical optical branching unit facilitating the work of making branch connections, maintenance and inspection work and the like, and a light distribution panel with the unit mounted thereon. SOLUTION: A multiconductor line-wire optical cable has its conductors previously separated from one another and connected to an optical adapter 6 and an optical branching unit 25 having integrated therewith an extra length storage part 16 storing the extra conductor length required for connection with the line-wire optical cable is used to eliminate the need for an FO cord that is conventionally used for connection with a line-wire-side terminating cable, so as to enhance profitability. Since the FO cord is thick with a structure in which a tape fiber conductor is covered with a protective tube, the protective tube needs to be peeled away for connecting work. Since the need for the FO cord is eliminated, productivity is enhanced and an extra length storage space and a wiring space are greatly reduced for compact size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical branch unit used for branch connection between an external optical cable and a local optical cable, and an optical distribution panel on which the optical branch unit is mounted.

[0002]

2. Description of the Related Art When transmitting signals (information) such as voices and images, signal transmission by an optical cable connected between a transmitting device (main station device) and a receiving device (subscriber device). Routes are used. Particularly recently, a high-density tape optical fiber cable has been used for this type of optical cable.

FIG. 5 is a front view of a light distribution frame, FIG. 6 is a plan view of a conventional connector unit, and FIG. 7 is an external view of an FO cord.

When an optical cable is connected to the transmission / reception-side equipment (transmission equipment) described above, an optical wiring rack 1 shown in FIG. 5 is used to facilitate work such as line switching work and maintenance and inspection. The optical wiring frame 1 includes a plurality of optical connectors 5 connected to the optical cable 2 and a plurality of connection portion storage trays 3. The wiring optical cord 7 connected to the optical cable 2 is connected to the FO cord 4 shown in FIG.
(Cord with one end connector). The optical connector 5 is housed and connected to an optical connector unit having a structure as shown in FIG.

[0005] The optical connector unit comprises a tape fiber core 9 and a protective tube 10 covering the tape fiber core 9.
And a branch processing unit 11 in which the tape fiber core 9 is branched into the respective fiber cores 9a, and the optical connectors 5 connected to the respective fiber cores 9a branched in the branch processing unit 11.
It is composed of

Accordingly, the optical cable 2 and the transmission equipment side are connected via the optical adapter 6 to the wiring optical cord 7 with the intra-office connector.
It is configured to be connected by.

[0007]

By the way, in the light distribution frame 1 constructed in the above-described conventional connection form, the optical cable 2 and the FO cord 4 are fusion-spliced (wiring work) in the same plane on one side of the front surface. In addition, since the connection and the wiring work of the wiring optical cord 7 with a connector inside the office and the wiring are performed, each work and the wiring space are required, and there is a problem that the light distribution frame 1 becomes large.

The optical connector unit has a slide type structure. After the optical connector unit is pulled out for each unit, the connection between the FO cord 4 on the outside line and the wiring optical cord with connector 7 and the extra length storage processing are performed on the optical adapter panel 8. However, since the work times on the outside line and inside the office are not always the same, there is a problem that work divisions are not broadly divided and it is difficult to share work responsibilities such as switching and maintenance and inspection. .

Further, as shown in FIG. 5, in the conventional FO cord 4 alone, the entirety of the tape fiber core 9 is protected by a protective tube 10, and a branch processing unit 11 separated from the tape fiber into a single core is provided. It has a complicated structure in which the optical connector 5 is attached to the single-core fiber core side, and at the time of connection work, it is necessary to peel off the protective tube, so that there is a problem that workability is poor and economic efficiency is poor.

In addition, the FO cord 4 has a large diameter and requires a large extra storage space, so that there is a problem that the optical wiring rack 1 is enlarged.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a compact and economical optical branching unit which is easy to perform operations such as branch connection and maintenance and inspection, and an optical distribution panel for mounting the same. Is to do.

[0012]

To achieve the above object, an optical branching unit according to the present invention is an optical branching unit used for branching connection between an external optical cable and a local optical cable, comprising: a unit case; and one end face of the unit case. An optical adapter panel having a plurality of optical adapters connected to the branch office optical cable, and one end is connected to each optical adapter and the extra length is aligned,
An optical fiber connected to the external optical cable, or a storage part for storing the optical fiber connected to the external optical cable at one end connected to each optical adapter at one end and the other end at the other end, wherein the storage part is a unit It is externally integrated with the case.

[0013] In addition to the above configuration, the optical branching unit of the present invention is preferably provided with convex projections on both sides of the optical adapter panel of the unit case.

An optical distribution panel on which an optical branching unit according to the present invention is mounted is a panel case for mounting an optical branching unit in an optical distribution panel mounting an optical branching unit used for branching connection between an external optical cable and a local optical cable. And a guide groove provided in the panel case in parallel from the front surface to the rear surface for inserting and removing each light branching unit at a predetermined interval.

In addition to the above configuration, the light distribution panel on which the optical branching unit of the present invention is mounted can be formed by inserting an optical branching unit provided with convex projections on both sides of an optical adapter panel of a unit case into a guide groove. The concave seat for gripping the portion may be horizontally arranged in the panel case.

In addition to the above configuration, an optical distribution panel on which the optical branching unit of the present invention is mounted has an extra-length lining for storing optical fiber cores and cords introduced from the outside and the inside of the station at the lower front and rear portions of the panel case. It is preferable that a storage shelf is provided, openings are formed at both end portions to be bolted to the light distribution rack so that the optical adapter panel of the optical branching unit is vertical, and a pair of handles are provided on the front surface.

According to the present invention, a multi-core external optical cable is preliminarily separated into a single core and connected to an optical adapter, and a housing portion for storing an extra cable length required for connection with the external optical cable is integrated. Conventionally, by using an optical branching unit,
This eliminates the need for the FO cord used for connection with the external line-side termination cable, thereby improving economic efficiency. Since the FO cord has a structure in which a protective tube is covered on the fiber core and is thick, it was necessary to peel off the protective tube when performing connection work. The storage space and wiring space are greatly reduced, making it compact.

[0018]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1A is a front view showing an embodiment of the optical branching unit according to the present invention, and FIG.
FIG. 1A is a side view, and FIG. 1C is a rear view of FIG.

The optical branching unit 25 is mounted on a unit case 24 composed of the case substrate 12 and the cover 13 and on one end face (the left end face in FIG. 1B) of the unit case 24, and is a branched optical fiber cable. (Not shown), an optical adapter panel 8 having multiple stages (two rows and eight stages in the figure, but not limited thereto), and one end of a branched fiber core 15a is connected to each optical adapter 6. An extra length storage portion 16 that is connected via the optical connector 5 and that stores the tape fiber core wire 15 before branching that is extra-length-lengthened and connected to an external optical cable (not shown).
The extra length storage portion 16 is externally integrated with the unit case 24. The projecting projections 19 are provided on both sides of the optical adapter panel 8 of the unit case 24.

That is, in this optical branching unit, the core fiber to which the optical fiber 5 is connected beforehand is separated from the tape fiber core 15 by a single core on the case substrate 12.
After the core wire is aligned and held at an appropriate bending radius with an excess core length, a cover 13 covering the entire case substrate 12 is formed.
From the opening 14 of the tape fiber core wire (shown by a broken line) 1
5 is taken out and closed. On the upper portion of the cover 13, a tape fiber core 15 taken out from the opening 14 is integrally formed with a surplus storage section 16 capable of storing an extra length necessary for connection with an external optical cable (terminated cable). It is.

With this configuration, the optical branching unit 25 does not require the FO cord conventionally used for connection with the external line termination cable, thereby improving the economy. Also, since the FO cord has a structure in which a protective tube is covered on a fiber core wire and is thick, it is necessary to peel off the protective tube when performing connection work. The extra storage space and wiring space are greatly reduced, making it compact.

FIG. 2A is a front view showing another embodiment of the optical branching unit of the present invention, and FIG.
2A is a side view, and FIG. 2C is a rear view of FIG. 2A.

The difference from the embodiment shown in FIGS. 1A, 1B and 1C is that one end of a branched fiber core 15a is connected to each optical adapter 6 and the other end is connected to the other end. The point is that a storage section 17 for storing the unbranched tape fiber core 15 connected to the external optical cable 27 via the connection section 26 is provided.

In such an optical branching unit 28, the optical branching unit 2 shown in FIGS.
The same effect as that of No. 5 is obtained.

FIG. 3A is a plan view showing an embodiment of a light distribution panel on which the light branching unit of the present invention is mounted.
3B is a front view of FIG. 3A, and FIG. 3C is a view of FIG.
FIG.

The light distribution panel 29 includes the light branching unit 2
And a guide groove 18 provided in the panel case 30 in parallel from the front surface to the rear surface for inserting and removing the light branching units 25 at predetermined intervals. In the panel case 30, an extra-length aligning storage shelf 21 is provided at the front and rear lower portions of the panel case 30 in which the concave receiving seats 20 are horizontally arranged near the upper and lower guide grooves 18. Openings 22 that can be bolted to a light distribution rack, which will be described later, are provided on both end surfaces with the mounting portion of the optical adapter panel 8 as a vertical surface, and a pair of handles 23 are provided on the front surface.

In the light distribution panel 29, the unit case 24 of the light branching unit 25 described above can be inserted into and pulled out of the guide groove 18, and the convex projection 19 provided on the light branching unit 25 can be inserted by appropriate pressing. The concave receiving seat 20 is configured to be held and fixed with an appropriate gripping force. The extra-length-wired storage shelf 21 can store fiber cores, cords, and the like to be introduced, so that the front and rear surfaces can be easily divided into an outside line side (rear surface processing) and a station inner side (front surface processing). And work efficiency is improved.

The light distribution panel 29 includes the light branching unit 25
The optical adapter panel 8 can be bolted to the light distribution frame so as to be vertical, and the handle 23 is provided on the front surface of the light distribution panel 29, so that it can be easily attached to and detached from the light distribution frame.

FIG. 4A is a front view of a light distribution frame on which the light distribution unit and the light distribution panel of the present invention are mounted.
FIG. 4B is a rear view of FIG.

The light distribution frame 31 includes a frame 32 and a door 34 that can be freely opened and closed attached to the front and rear surfaces of the frame 32.
And the optical branching units 2 provided on the left and right in the frame 32.
The light distribution panel 29 on which 5 is mounted is composed of a pair of columns 33 that are attached in multiple stages.

By using such an optical distribution frame 31, in the branch connection between the external optical cable and the intra-office optical cable, connection work, maintenance and inspection work, and the like are facilitated, and the entire apparatus becomes compact and economical efficiency is improved.

[0033]

In summary, according to the present invention, the following excellent effects are exhibited.

It is possible to provide a compact and economical optical branching unit and a light distribution panel on which the same is mounted, in which operations such as branch connection and maintenance and inspection are easy.

[Brief description of the drawings]

1A is a front view showing an embodiment of an optical branching unit of the present invention, FIG. 1B is a side view of FIG. 1A, and FIG. 1C is a rear view of FIG. is there.

2A is a front view showing another embodiment of the optical branching unit of the present invention, FIG. 2B is a side view of FIG. 2A, and FIG. 2C is a rear view of FIG. It is.

3A is a plan view showing an embodiment of an optical distribution panel on which the optical branching unit of the present invention is mounted, FIG. 3B is a front view of FIG. 3A, and FIG. 3C is a side view of FIG. FIG.

FIG. 4A is a front view of a light distribution frame on which the light distribution unit and the light distribution panel of the present invention are mounted, and FIG. 4B is a rear view of FIG.

FIG. 5 is a front view of the light distribution frame.

FIG. 6 is a plan view of a conventional connector unit.

FIG. 7 is an external view of the FO code.

[Explanation of symbols]

 Reference Signs List 5 optical connector 6 optical adapter 8 optical adapter panel 15 tape fiber core wire 15a fiber core wire 16 extra length storage section 25 light branching unit 29 light distribution panel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirofumi Monoi 880 Sunazawa-cho, Hitachi City, Ibaraki Prefecture Inside the Takasago Plant of Hitachi Cable Co., Ltd. F-term (reference) 2H036 RA03 RA04 RA11 RA22 2H038 CA37 CA38

Claims (5)

[Claims] 1. An optical branching unit used for branch connection between an external optical cable and an intra-office optical cable, comprising: a unit case; and one end face of the unit case,
An optical adapter panel having a plurality of optical adapters connected to the branched intra-office optical cable, and one end connected to each optical adapter and trimmed for extra length, or an optical fiber connected to the external optical cable, or one end A storage section for storing the optical fiber connected to the external optical cable via the connection section at the other end, wherein the storage section is externally integrated with the unit case. Characteristic light branching unit. 2. The optical branching unit according to claim 1, wherein convex projections are provided on both sides of the optical adapter panel of the unit case. 3. An optical distribution panel on which an optical branching unit used for branching connection between an external optical cable and an intra-office optical cable is mounted, wherein a panel case for mounting the optical branching unit is parallel to the inside of the panel case from the front to the rear. And a guide groove for inserting and removing each light branching unit at a predetermined interval. 4. When the optical branch unit provided with the convex protrusions on both sides of the optical adapter panel of the unit case is inserted into the guide groove, a concave seat for gripping the convex protrusion is provided in the panel case. 4. The device according to claim 3, which is arranged horizontally.
An optical distribution panel on which the optical branching unit according to 1 is mounted. 5. An extra-length line storage shelf for storing optical fiber cores and cords introduced from the outside line side and the inside of the station is provided at the front and rear lower parts of the panel case, and the optical adapter panel of the optical branching unit is vertical. The light distribution panel according to claim 4, wherein openings that can be bolted to the light distribution frame are formed at both end surfaces, and a pair of handles are provided on a front surface.