JP2001116968A - Optical communication trunk cable and branching tool for optical communication trunk cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optical communication trunk cable and a branching tool for the optical communication trunk cable capable of wiring the optical communication cable by executing hard work such as welding and connecting in a factory and by using the branching tool for attaching with simple work in a job site and capable of being transferred in the same manner as a conventional one from the factory to the job site. SOLUTION: The optical communication trunk cable is composed of a connecting optical cable wherein sheathes in at least two or more prescribed positions of an optical communication trunk cable main body in which plural coated optical fibers or optical fiber tapes are covered with the sheath are removed in the factory and wherein a connector is attached to a tip end welded/connected with the taken-out coated optical fibers or the optical fibers tapes, a casing body which covers a base plate to which a connector connecting the connector of the connecting optical cable to the connector of an FO cable connected to an optical wiring box in the installing job site is attached and the optical communication trunk cable main body in the base plate section, and the branching tool consisting of a cover body which houses the base plate attached to the casing body so as to be attachable and detachable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication trunk cable used for installing an optical communication trunk cable in a building such as an office building, and a branching device for the optical communication trunk cable.

[0002]

2. Description of the Related Art Conventionally, in office buildings and the like, an optical communication trunk cable suspended from an upper part of a connected building is connected to an on-premises optical cabinet PT connected to an external optical communication trunk cable provided underground. Is fused to the premises optical cabinet PD installed on the predetermined floor, and the premises optical cabinet PD is connected to the floor and the upper and lower floors using optical cables on the respective floors. Connected to device.

[0003]

In a conventional optical communication trunk cable used in a suspended state in a building, a sheath at a predetermined position is removed at an installation site, and a tape core of the optical communication trunk cable is connected to a premises optical cabinet. The work of fusion splicing to the PD has to be performed, which is troublesome and troublesome.

The present invention has been made in view of the above-mentioned conventional drawbacks,
The optical communication cable can be wired using a branching tool that can be installed at the factory without performing the hard work such as fusion splicing at the factory, and can be installed with simple work at the factory. It is an object of the present invention to provide an optical communication trunk cable and a branching device for an optical communication trunk cable, which can be transferred to a site almost in the same manner as in the prior art.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0006]

In order to achieve the above object, according to the present invention, a plurality of optical fibers or tape optical fibers used in a suspended state from the upper part to the lower part of a building are covered with a sheath. An optical communication trunk cable main body, and a sheath at at least two or more predetermined positions of the optical communication trunk cable main body are removed at a factory, and a predetermined optical core or tape optical core of the optical communication trunk cable main body is removed. A connection optical cable having a connector attached to a fusion spliced end, a cover covering a lower portion of the sheath removed portion so that the end of the connection optical cable protrudes outward, and a connector for the connection optical cable at an installation site And a base plate to which a connector for connecting a connector of the FO cable connected to the optical distribution box is attached. Case covering the communication trunk cable body, and constitutes the optical communications trunk cable and the branch device comprising a cover for housing the base plate is detachably attached to the case body therein.

Further, according to the present invention, a connector at the end of a connection optical cable spliced to an optical fiber or a tape optical fiber branched from an optical communication trunk cable and an FO cable connector to be connected to an optical distribution box are provided. A base plate to which a connecting tool to be connected is attached, a case body covering the base plate and the optical communication trunk cable at the base plate portion, and the base plate detachably attached to the case body are housed therein. The cover and the cover constitute an optical communication trunk cable branching tool.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 9, reference numeral 1 denotes through holes 3, 3, 3, 3 formed on the floor of each floor from the upper floor of a building 2 such as an office building. And the optical communication trunk cable of the present invention installed in a suspended state on the lower floor, wherein the optical communication trunk cable 1 is manufactured at a factory, which is designed in advance to suit the installation site. As shown in FIG. 3, a tape-slot type optical communication trunk cable main body 5 provided with five four-core optical fibers 4, 4, 4, 4, and 4 is provided at the upper end of the optical communication trunk cable main body 5. As shown in FIG. 4, a cable hanging member 7 that can be attached to a mounting bracket 6 fixed to a ceiling portion of the building 2 attached to the building 2, and the optical communication trunk cable main body 5 located on each floor of the building 2. Sheath 8 at site
Is removed as shown in FIG. 5, and a four-core tape optical fiber 4,
4, 4, 4, and 4 and covered with a protective tube 9, and a MU-type simple ferrule 10, 1
Connection optical cables 11, 1 to which 0, 10, 10 are attached
1, 11, 11, 11, and covers 12, 12, 12, 12, 12 that cover the lower part of the portion where the sheath 8 is removed so that the distal end of the connection optical cable 11 projects outward.

13, 13, 13, 13, 13 are MU type connectors 15 connected to the connection optical cables 11, 11, 11, 11, 11 and the optical distribution boxes 14, 14, 14, 14, 14 at the installation site. FO cable 1 provided
6, 16, 16, 16, 16, 16 and a branching tool that covers the connection portion.
As shown in FIGS. 7 to 9, reference numerals 3 and 13 denote a storage portion 17 for storing the fusion spliced portion of the connection optical cable 11 which can be supported by the sheath 8 removal portion of the optical communication trunk cable main body 5 and the storage portion 17. MU-type simple ferrules 10, 10, 10, 10 of connection optical cable 11 and connector 18 connected to MU-type connector 15 of FO cable 16
The base plate 19 provided with the base plate 19 and the base plate support portion 20 at which the base plate 19 and the optical communication trunk cable main body 5 at the mounting portion of the base plate 19 are formed are sequentially reduced in diameter at the lower end. The base plate 19 is located inside a box-shaped case body 21 and a plurality of screws 22 attached to the case body 21 so as to cover the opening 21a of the case body 21. And a cover 23.

At the factory, the connecting optical cables 11, 11, 11, 11, 11 are fusion-spliced to the optical communication trunk cable main body 5 having the above configuration, and the connecting portion is protected by a protective cover or the like and transported to the installation site, where the branching tool is provided. 13,13,13,13,13
, While hanging from the upper floor to the lower floor of the building 2, or hanging from the upper floor to the lower floor, the branching devices 13, 13, 13, 13, and 13 are attached to complete the optical communication trunk cable 1. .

[0012]

FIG. 10 to FIG.
Hereinafter, different embodiments of the present invention will be described. In the description of the different embodiments of the present invention, the same components as those of the first embodiment of the present invention are denoted by the same reference numerals, and duplicate description will be omitted.

The second embodiment of the present invention shown in FIGS. 10 to 13 is mainly different from the first embodiment of the present invention in that the upper and lower ends of the case body 2 are sequentially reduced in diameter.
Branching tools 13A, 13 using 1A and cover body 23A
A, 13A, 13A, 13A, the branching tool 13A, 13A, 13A, 13A, 13A, 1
Even with the optical communication trunk cable 1A using 3A, the same operation and effects as those of the first embodiment of the present invention can be obtained.

The third embodiment of the present invention shown in FIG. 14 to FIG. 17 is mainly different from the first embodiment of the present invention in that connectors 24, 24, 2
Connection optical cables 11A, 11 to which 4, 24 are attached
A, 11A, 11A, 11A and the connecting optical cable 1
1A, 11A, 11A, 11A, 11A connector 2
A branching tool 13 using a connecting tool 18A to connect 4, 4, 24, 24 and the connector 15 of the FO cable 16
In terms of using B, 13B, 13B, 13B, and 13B, even the optical communication trunk cable 1B configured as described above can provide the same operation and effects as those of the first embodiment of the present invention.

The fourth embodiment of the present invention shown in FIGS. 18 to 22 is different from the first embodiment of the present invention mainly in that a predetermined portion of the optical communication trunk cable main body 5 is removed from the sheath removal portion. An MT connector 25 is attached to the distal end of the four-core optical fiber 4 that has been drawn out, and an MT connector 26 connected to the MT connector 25 is attached, and a simple ferrule 27 is attached to the distal end of the connection optical cable 28. In addition, a simple receptacle 29 connected to the simple ferrule 27 of the connection optical cable 28 has an optical communication trunk cable branching tool 13C including a cover 23B covering the sheath removal portion attached to one end. As shown in FIG. 22, the optical communication trunk cable 1C configured as described above is connected to the simple receptacle 29 and the optical distribution box 14. The can be easily connected with FO cable 16. The optical communication trunk cable branching device 13
FO cable 1 connected to C simple receptacle 29
6 is a soft vinyl cover 3 covering the end of the optical communication trunk cable branching device 13C.
Cover with 0.

In each of the embodiments of the present invention, a tape slot type is used as the optical communication trunk cable main body 5. However, the present invention is not limited to this, and a plurality of optical fibers are bundled. A sheath covered with a sheath may be used, and ten, fifteen, 25
Pieces, 50 pieces, branching tools 13, 13A, 13B, 1
3C may be provided not on each floor but on a predetermined floor.

[0017]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) An optical communication trunk cable main body in which a plurality of optical cores or tape optical cores used in a state of being suspended from an upper part to a lower part of a building are covered with a sheath, and At least two or more sheaths at predetermined positions are removed at a factory, and a connection is made by attaching a connector to a distal end portion of the optical communication trunk cable body that is fusion-spliced with a predetermined optical core or tape optical core. An optical cable and a cover that covers a lower portion of the sheath removed portion so that a distal end portion of the connection optical cable protrudes outward;
A base plate on which a connector to which a connector of the connection optical cable and a connector of the FO cable connected to the optical distribution box are connected at an installation site, the base plate, and the optical communication trunk cable main body at the base plate portion are covered. Since it is composed of a branch body consisting of a case body and a cover body which houses the base plate detachably attached to the case body, the optical communication trunk cable body and the connection cable are fused at the installation site. You do not need to connect.

(2) According to the above (1), the branch portion for connecting the optical fiber core or the tape optical fiber core of the optical communication trunk cable main body to the connection cable is fusion-spliced at the factory, so that quality assurance can be ensured. . Therefore, the reliability of the wiring of the optical communication trunk cable can be improved.

(3) According to the above (1), at the installation site, the connection between the connector and the connection tool and the installation of the branching tool including the base plate, the case body, and the cover body can be performed. Even so, the connection operation can be easily performed.

(4) Claims 2, 3, and 4 also provide (1) to (4).
The same effect as (3) can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a use state of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of the first embodiment of the present invention.

FIG. 3 is an explanatory view of an optical communication trunk cable main body according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of the cable hanging device according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a connection state of a branch unit according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a mounted state of the branching tool according to the first embodiment of the present invention.

FIG. 7 is an exploded view of the branching tool according to the first embodiment of the present invention.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6;

FIG. 9 is a sectional view taken along lines 9-9 in FIG. 6;

FIG. 10 is an explanatory diagram of a use state according to the second embodiment of the present invention.

FIG. 11 is an explanatory view of a second embodiment of the present invention.

FIG. 12 is an explanatory diagram of a branching unit according to the second embodiment of this invention.

FIG. 13 is an exploded view of the branching tool according to the second embodiment of the present invention.

FIG. 14 is an explanatory diagram of a use state according to the third embodiment of the present invention.

FIG. 15 is an explanatory view of a third embodiment of the present invention.

FIG. 16 is an explanatory diagram of an attached state of a branching tool according to a third embodiment of the present invention.

FIG. 17 is an exploded view of the branching tool according to the third embodiment of the present invention.

FIG. 18 is an explanatory diagram of a use state according to the fourth embodiment of the present invention.

FIG. 19 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 20 is an explanatory diagram illustrating a connection state of a branch unit according to the fourth embodiment of this invention.

FIG. 21 is an explanatory diagram of a mounted state of a branching tool according to a fourth embodiment of the present invention.

FIG. 22 is a perspective view of a fourth embodiment of the present invention.

[Explanation of symbols]

1, 1A, 1B, 1C: Optical communication trunk cable, 2: Building, 3: Through hole, 4: 4-core optical fiber cable, 5: Optical communication trunk cable main body, 6: Mounting bracket,
7: cable hanger, 8: sheath,
9: Protection tube, 10: MU type simple ferrule, 1
1, 11A: connection optical cable, 12: cover, 13, 1
3A, 13B, 13C: branching tool, 14: optical distribution box, 15: MU-type connector, 16: FO cable,
17: storage portion, 18, 18A: connecting device, 19: base plate, 20: base plate support portion, 21, 21A, 21
B: Case body, 22: Screw, 23, 23
A, 23B: cover body, 24: connector, 2
5: MT connector, 26: MT connector, 27:
Simple ferrule, 28: connection optical cable, 29: simple receptacle, 30: soft vinyl cover.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiyuki Igarashi 4125 Toyokuni Electric Wire Co., Ltd., Saitama Plant, 4125 Saitama, Gyoda City, Saitama Prefecture (72) Inventor Makoto Ogihara 4125 Toyokuni Electric Wire Company, Ltd. (72) Inventor Gen Tamura 4125 Toyokuni Electric Wire Co., Ltd., Saitama Plant, 4125 Saitama, Gyoda City, Saitama Prefecture 4125 Saitama Plant, Gyoda City, Pref., Saitama Factory (72) Inventor Kenji Nonaka 4125 Saitama Plant, Gyoda City, Saitama Prefecture, Saitama Plant 4H001 BB27 BB28 FF07 HH01 2H038 CA33 CA38 CA63

Claims (6)

[Claims] 1. An optical communication trunk cable body in which a plurality of optical fibers or tape optical fibers used in a suspended state from an upper part to a lower part of a building are covered with a sheath, and at least the optical communication trunk cable body. A connection optical cable in which a sheath is removed at a factory at two or more predetermined positions, and a connector is attached to a distal end portion of the optical communication trunk cable main body that is fusion-spliced with a predetermined optical core or tape optical core. A cover for covering a lower portion of the sheath removal portion so that a distal end portion of the connection optical cable projects outward, and a connector of the connection optical cable and a connector of an FO cable connected to an optical distribution box at an installation site are connected. Base member to which a connecting member is attached, a case body covering the base plate and the optical communication trunk cable main body at the base plate portion, and the case body An optical communication trunk cable comprising: a cover member removably mounted on the base plate and a cover body for housing the base plate therein. 2. An optical communication trunk cable main body in which a plurality of optical cores or tape optical cores used in a suspended state from an upper part to a lower part of a building are covered with a sheath, and at least the optical communication trunk cable main body. Two or more sheaths at predetermined positions are removed at a factory, and an MU-type simple ferrule is attached to a tip portion of the optical communication trunk cable body which is fusion-spliced with a preset optical core or tape optical core. A connection optical cable, and a cover that covers the sheath-removed portion so that a distal end portion of the connection optical cable projects outward.
A base plate having a connector for connecting a connector of an FO cable connected to an MU type simple ferrule of the connection optical cable and an optical distribution box at an installation site, and a storage portion for storing a fusion splicing portion of the connection optical cable; A case body for covering the base plate, the optical communication trunk cable main body at the base plate portion, and a branching tool including a cover body for accommodating the base plate detachably attached to the case body. And optical communication trunk cable. 3. An optical communication trunk cable main body in which a plurality of optical cores or tape optical cores used in a suspended state from an upper part to a lower part of a building are covered with a sheath, and at least the optical communication trunk cable main body. Two or more sheaths at predetermined positions are removed at a factory, and a predetermined optical core or tape optical core of the optical communication trunk cable main body is drawn out to a predetermined size, and an MT connector attached to a tip end thereof, An MT connector to be connected to the MT connector is attached, a connection optical cable having a simple ferrule attached to a distal end thereof, and one end of the sheath-removed portion is connected to the leading end of the pulled out optical fiber or tape optical fiber. A cover for projecting outward, and a simple receptacle in which a simple ferrule of the connection optical cable is connected to one end for covering the sheath removal portion. An optical communication trunk cable, comprising: a branching tool including a cover body to which a tuckle is attached. 4. A connector at the tip of a connection optical cable which is fusion-spliced to an optical fiber or a tape optical fiber branched from an optical communication trunk cable, and a connector of an FO cable which is connected to an optical distribution box. A base plate to which a connector is attached, a case body covering the base plate and the optical communication trunk cable at the base plate portion, and a cover body housing the base plate detachably attached to the case body. A branching tool for an optical communication trunk cable, comprising: 5. A connector at a tip end of a connection optical cable fusion-spliced with an optical fiber or a tape optical fiber branched from an optical communication trunk cable, and a connector of an FO cable connected to an optical distribution box are connected. A base plate provided with an accommodating portion for accommodating the connection tool and the fusion splicing portion, a case body covering the base plate and the optical communication trunk cable at the base plate portion, and the case detachably attached to the case body. A branching device for an optical communication trunk cable, comprising a cover body for housing a base plate therein. 6. A case body capable of detachably covering a sheath-removed portion of an optical communication trunk cable, and an optical fiber drawn out of the optical communication trunk cable attached to one end of the case body. A branching device for an optical communication trunk cable, comprising: a simple receptacle to which a simple ferrule of a connection optical cable having an MT connector connected to a tape optical fiber is connected.