JP2001318284A - Optical communication trunk cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optical communication trunk cable, from which a coated optical fiber tape can be easily fulled out of its inserting slot and wired to a connecting part in the case of branch wiring and from which a coated optical fiber tape in its inserting slot can be taken out arbitrarily. SOLUTION: The optical communication trunk cable consists of a trunk cable body, formed with plural optical cable inserting slots on the outer circumference in the center of which a tension member is imbedded, plural optical cables for which a resin coating is applied to plural coated optical fibers stored slidably inside the inserting slots of the trunk cable body, and a sheath formed via a tape bound restrainingly on the outer circumference of the trunk cable body.

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 cable in a building such as an office building.

[0002]

2. Description of the Related Art A conventional optical communication trunk cable has a tension member buried in the center and a plurality of U-shaped optical tape core insertion slots formed in an outer peripheral portion. A plurality of optical tape cores, each of which is fixedly inserted into a plurality of optical tape core insertion slots of the communication trunk cable main body, and a tape formed by pressing and winding an outer peripheral portion of the optical communication trunk cable main body. And a sheath.

[0003]

In the conventional optical communication trunk cable, a plurality of optical tape cores are fixedly inserted into a U-shaped optical tape core insertion slot of the optical communication trunk cable body. When wiring to a building, etc., of the plurality of optical tape core wires stored in the optical tape core wire insertion slot, the optical tape core wire located outside must be cut to branch at the lower floor. However, there is a special condition in the branch wiring, which is troublesome, and has a drawback that the optical fiber ribbon can be taken out only at a portion where the sheath is removed for branching.

The present invention has been made in view of the above-mentioned conventional drawbacks,
In the case of branch wiring, the optical fiber ribbon can be easily pulled out from the optical fiber cable insertion slot and wired to the connection portion, and the optical fiber ribbon in the optical fiber cable insertion slot can be arbitrarily taken out. It is intended to provide an optical communication trunk cable that can be used.

The foregoing and other objects and novel features of the invention will become more fully 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]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an optical communication trunk cable body having a plurality of optical cable insertion slots formed in an outer peripheral portion having a tension member buried in a central portion. A plurality of optical cables in which a plurality of optical fiber core wires slidably accommodated in a plurality of optical cable insertion slots of the optical communication trunk cable body are covered with a resin coating, and an outer peripheral portion of the optical communication trunk cable body. The optical communication trunk cable is constituted by a sheath formed via the tape wound down.

[0007]

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 8, reference numeral 1 denotes an optical communication trunk cable of the present invention used when an optical communication cable is installed in a building 2 such as an office building. The optical communication trunk cable 1 has a plurality of U-shaped optical cable insertion slots 4, 4, 4 in the state of being twisted around the outer periphery where the tension member 3 is embedded in the center, in the embodiment of the present invention. , 4, 4, and 4, and optical cable insertion slots 4, 4, 4, 4, and 5 of the optical communication trunk cable main body 5.
A plurality of optical cables 6 accommodated in the optical cable insertion slots 4, 4, 4, 4, 4 in the embodiment of the present invention; A sheath 8 made of flame-retardant polyethylene is formed on the outer periphery of the optical communication trunk cable main body 5 via a plastic tape 7 which is pressed and wound.

As shown in FIG. 5, the optical cable 6 has a plurality of optical fibers 6, and in the embodiment of the present invention, four optical fiber cores 9,
9, 9, 9 and a resin coating using an ultraviolet curable resin formed on the outer peripheral portion of the optical fiber core wires 9, 9, 9, 9 via a quartz fiber 10 so that the outer peripheral portion has a circular shape. 1
1 and 1.

In the optical communication trunk cable 1 having the above structure, the optical communication trunk cable main body 5 and the tension member 3 at the upper end are fixed to the cable suspending device 12. At this time, the optical cable insertion slots 4, 4, 4,
Care should be taken not to fix the upper ends of the plurality of optical cables 6 housed in 4, 4 and 4.

The optical communication trunk cable 1 to which the cable suspending device 12 is fixed is attached to a mounting bracket 13 attached to a ceiling or the like on an upper floor of a building 2 such as an office building.
2 is mounted and passed through through holes 14 formed in the floor of each floor, and is suspended from the lower floor.

Thereafter, the optical fiber cores 9 of the plurality of optical cables 6 of the optical communication trunk cable 1 are connected to the premises optical cabinet 16 to which the external optical communication trunk cable 15 is connected.

An optical distribution box 1 installed on each floor
In FIG. 7, the sheath 8 of the optical communication trunk cable 1 is removed at each floor or at a predetermined floor as shown in FIG. 6, and a plurality of optical cables inserted into the optical cable insertion slots 4, 4, 4, 4, 4, 4 are inserted. As shown in FIG. 7, a preset optical cable 6 of the optical cable 6 is pulled out from the optical cable insertion slot 4, cut to a length connectable to the optical distribution box 17, and connected. Cover with branching tool 19.

[0014]

Next, different embodiments of the present invention shown in FIGS. 9 to 14 will be described. In addition,
In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted.

The second embodiment of the present invention shown in FIGS. 9 to 11 mainly differs from the first embodiment of the present invention in that the optical cable insertion slots 4, 4, 4,.
Indications 20, 20A, 20B, 20C, 20D, 2, which are printed in lines in different colors in 4, 4, 4
The optical communication trunk cable main body 5A thus formed is different from the optical communication trunk cable main body 5A provided with 0E.
The same effects as those in the first embodiment of the present invention can also be obtained with the optical communication trunk cable 1A configured by using the first embodiment.

The third embodiment of the present invention shown in FIGS. 12 to 14 is mainly different from the second embodiment of the present invention in that the optical cable insertion slots 4A, 4A, 4A, 4A, 4A, 4A, the optical communication trunk cable main body 5B, and the optical communication trunk cable main body 5B identification display 20, 20A, 20B, 20C,
A linear line, a dotted line, and a dashed line that can be distinguished from those inserted in the same optical cable insertion slots 4A, 4A, 4A, 4A, 4A, 4A with the same color as 20D and 20E. In the embodiment of the present invention, for example, a display 21, 22, 21 A, 22 A, 21 B, or 21 B for identifying a straight line and a dotted line, such as a line with a symbol and a symbol.
22B, 21C, 22C, 21D, 22D, 21E, 2
Optical cables 6, 6A, 6B, 6C, 6 provided with 2E
D, 6E, 6F, 6G, 6H, 6I, 6J, and 6K are used in the optical communication trunk cable 1 configured as described above.
In the case of B, the same operation and effect as those of the second embodiment of the present invention can be obtained, and erroneous wiring can be efficiently prevented.

In each of the embodiments of the present invention, the optical cable insertion slot 4, 4, 4, 4, 4, 4 or 4
A, 4A, 4A, 4A, 4A, 4A, and the case where two optical cables 6, 6 are respectively inserted into 4A have been described.
The present invention is not limited to this, and 0 to several optical cables 6, 6A to 6K may be inserted into the optical cable insertion slots 4, 4, 4, 4, 4, 4, or 4A, 4A, depending on the number of optical cables used.
4A, 4A, 4A, 4A. Further, a plurality of optical cable insertion slots other than the six optical cable insertion slots may be formed in the optical communication trunk cable main bodies 5, 5A, and 5B.

[0018]

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

(1) An optical communication trunk cable main body having a plurality of optical cable insertion slots formed in an outer peripheral portion in which a tension member is embedded in a central portion, and a plurality of optical cable insertion slots in the optical communication trunk cable main body. It is composed of a plurality of optical cables in which a plurality of optical fibers accommodated in a slidable manner are covered with a resin coating, and a sheath formed through a tape wound around the outer periphery of the optical communication trunk cable body. Therefore, the optical cable to be used can be pulled out from the optical cable insertion slot by removing the sheath at the branching point. Therefore, the pulled-out optical cable can be linearly connected to the optical wiring box or the like, and the wiring operation can be performed easily.

(2) According to (1), the optical cable housed in the optical cable insertion slot can be directly connected to an optical distribution box or the like, so that the optical cable can be used effectively and economical wiring can be performed. it can.

(3) According to the above (1), since the optical cable is slidably housed in the optical cable insertion slot, it is easy to pull out the optical cable, and it is possible to efficiently prevent accidents that may damage the optical cable. it can.

(4) Claims 2 and 3 also have the above-mentioned (1) to (3).
The same operation and effect as described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an explanatory diagram of a state in which a sheath according to the first embodiment of the present invention has been removed.

FIG. 5 is an explanatory diagram of the optical cable according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a state where a sheath of a branch portion is removed according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram of a state in which the optical cable according to the first embodiment of the present invention is pulled out.

FIG. 8 is an explanatory diagram of a use state of the first embodiment of the present invention.

FIG. 9 is a front view of a second embodiment of the present invention.

FIG. 10 is an enlarged sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is an explanatory view of an optical communication trunk cable main body according to a second embodiment of the present invention.

FIG. 12 is a front view of a third embodiment of the present invention.

FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG. 12;

FIG. 14 is an explanatory diagram showing a state where an optical cable according to a third embodiment of the present invention is taken out.

[Explanation of symbols]

1, 1A, 1B: optical communication trunk cable, 2: building
3: tension member, 4, 4A: optical cable insertion slot, 5, 5A, 5B: main body of optical communication trunk cable, 6, 6A to 6K: optical cable, 7: plastic tape, 8: sheath, 9: optical fiber core, 1
0: quartz fiber, 11: resin coating, 12: cable suspension, 13: mounting bracket, 14: through hole, 15: external optical communication trunk cable, 16: indoor optical cabinet, 17: optical wiring box, 18: sheath removal Part, 19: branching tool, 20, 20A to 20E: display for identification.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenji Nonaka 4125 Saitama, Gyoda-shi, Saitama F-term in the Saitama Plant of Toyokuni Electric Wire Co., Ltd. F-term (reference) 2H001 BB09 BB22 DD04 DD23

Claims (3)

[Claims] 1. An optical communication trunk cable main body having a plurality of optical cable insertion slots formed in an outer peripheral portion having a tension member embedded in a central portion, and sliding into the plurality of optical cable insertion slots of the optical communication trunk cable main body. It comprises a plurality of optical cables in which a plurality of optical fibers accommodated movably are covered with a resin coating, and a sheath formed via a tape pressed and wound around the outer periphery of the optical communication trunk cable body. An optical communication trunk cable. 2. An optical communication trunk cable main body having a plurality of substantially U-shaped optical cable insertion slots formed in an outer peripheral portion in which a tension member is buried in a central portion, and a plurality of optical cables of the optical communication trunk cable main body. A plurality of optical cables in which a plurality of optical fiber core wires slidably accommodated in an insertion slot are covered with a resin coating so that an outer peripheral portion has a circular shape; and An optical communication trunk cable comprising a sheath formed through a wound tape. 3. An optical communication trunk cable main body in which a plurality of substantially U-shaped optical cable insertion slots are formed in an outer peripheral portion in which a tension member is buried in a central portion, and an optical cable insertion slot of the optical communication trunk cable main body. The formed identification display, and a plurality of optical cables covered with resin coating a plurality of optical fiber core wires slidably accommodated in a plurality of optical cable insertion slots of the optical communication trunk cable body, An optical communication trunk cable, comprising: a sheath formed through a tape wound around the outer periphery of the optical communication trunk cable main body.