KR100308506B1 - Fold Unit and Ultra-Central Optical Cable With It - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fold unit and an ultra multi-core optical cable having the same, and an object thereof is to significantly increase the optical fiber density by minimizing a gap between the groove and the groove into which a plurality of optical fiber ribbons are stacked.

According to the present invention, both side wall surfaces and bottom surfaces are integrally formed, and a space portion having an open top is provided, and a predetermined inclined surface is formed at both bottom corners, and a plurality of fold units spirally installed on the outer circumferential surface of the multi-slot rod, It is installed in the space part of the unit, and is installed between a plurality of inner film grooves in which a plurality of optical fiber ribbons are stacked to be stacked, and both fold units so as to be supported by the inclined surface of the fold unit, and a plurality of optical fiber ribbons inside It has a feature consisting of a plurality of outer film grooves adapted to be stacked.

According to the present invention, a plurality of inner film grooves are installed in which a plurality of optical fiber ribbons are stacked to be stacked in a plurality of fold units arranged on the outer circumferential surface of the multi slot rod, thereby minimizing a gap between the grooves and the grooves. In addition, a predetermined inclined surface is provided on both bottom surfaces of the fold unit so that one external film groove can be installed between adjacent fold units, thereby increasing the optical fiber density of the optical cable.

Description

Fold Unit and Ultra-Central Optical Cable With It

The present invention relates to a fold unit and a super multi-fiber optical cable having the same, and more particularly, a plurality of film-like grooves are inserted into a predetermined support member having an open upper portion, and a film type is disposed between adjacent fold units. By providing more grooves, the present invention relates to an ultra-high optical fiber cable that can significantly increase the optical fiber density.

In general, the demand for optical cables is gradually increasing due to the spread of subscriber networks related to various communication services such as LAN, LOCAL AREA NETWORK, bidirectional communication, and video call.

There are various types of such optical fiber cables, depending on the use, and are largely divided into a cable installed outdoors, a cable installed indoors and a cable for entry installed between the outdoors and indoors.

Among these optical cables, outdoor cables may be installed for several tens of kilometers or thousands of kilometers, and when they are buried underground, they are dug into the ground and buried in soil. When an abnormality occurs in a track, it is very difficult to check and repair and replace cables. There is a very difficult disadvantage.

Therefore, to compensate for these disadvantages, a communication tunnel is artificially installed underground and a cable is installed in the tunnel (communication port).

In this case, the maintenance and replacement of the cable is easy, but there is a problem that the overall construction cost is enormous.

Therefore, in recent years, the optical cable construction method is mainly used to install a hollow pipe (Pipe) having a constant diameter in the ground and then insert the cable into the pipe.

The pipelines are installed between manholes and manholes at regular intervals because they are buried in lengths of hundreds to thousands of kilometers.

In this case, the rope is inserted into the pipeline, and the pipeline is buried underground, and the cable is installed in the pipeline by pulling and connecting the optical cable to the end of the rope.

In addition, in the case of the incoming optical cable, since the cable from the outdoor cable to the terminal box inside the building must be installed, a predetermined pipeline is formed through the wall of the building and drawn into the building.

Therefore, in order to install the optical cable into a narrow space pipe, the diameter of the optical cable must be made smaller and lighter.

1 is a cross-sectional view of a conventional ultra-core optical cable.

Referring to this, in the multi slot optical cable, a plurality of grooves 42 having a predetermined depth are spirally formed along the outer circumferential surface of the multi slot rod 40, and a plurality of optical fiber ribbons 30 are formed in the grooves 42. It is inserted to be stacked, and the central tensile line 41 of steel wire or high strength synthetic fiber is inserted on the central axis is configured to correspond to the external force.

In addition, a predetermined waterproof layer 43 is formed on the outer circumferential surface of the multi-slot rod 40, and a plurality of U grooves 50 are disposed on the outer surface of the multi-slot rod 40 to be in close contact with each other, and are installed spirally along the length direction. do.

The outer circumferential surface of the U groove 50 is a waterproof layer 44 coated with a waterproof tape to prevent moisture penetration, and the aluminum or steel to mitigate moisture penetration and external impact force on the outer circumferential surface of the waterproof layer 44. The metal coating layer 45 is formed, and a polystyrene (PE) coating layer 46 is formed on the outermost layer.

At this time, since the grooves 42 and the U grooves 50 of the multi-slot core should be formed with a predetermined width and depth so that a plurality of optical fiber ribbons 30 can be stacked to be stacked, the grooves 42 and the grooves adjacent to each other are formed. The space between the 42 or the U groove 50 and the U groove 50 essentially requires a dead zone, and this space is a major factor in reducing the optical fiber density of the ultra-concentric optical cable.

The main object of the present invention is to install a plurality of film grooves having a very thin wall on both sides of the fold unit in the open fold unit, and inserting a plurality of optical fiber ribbons into the film grooves so that the optical fiber ribbons are inserted. It is to provide a fold unit and a super multi-core optical cable having the same, which minimizes the gap between the groove and the groove, thereby significantly increasing the optical fiber density of the optical cable.

In addition, it is to provide a fold unit and a super multi-fiber optical cable having the fold unit to form a predetermined inclined surface on both sides of the fold unit so that one film groove can be installed between adjacent fold units.

1 is a cross-sectional view of a conventional multi-core optical cable,

2 is a perspective view illustrating a state in which an optical fiber ribbon is installed in a fold unit according to the present invention;

3 is a cross-sectional view showing a state in which an optical fiber ribbon is installed in the fold unit according to the present invention;

4 is a cross-sectional view of an ultra multi-core optical cable having a fold unit according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: Fold unit 11: Both side wall

13: bottom 14: bottom

15: inclined surface 20: inner film groove

21: both side wall 25: outer film groove

26: both side wall 30: optical fiber ribbon

40: multislot rod

In the fold unit according to the present invention, both side wall surfaces and bottom surfaces are integrally formed, and a plurality of inner film grooves are provided in close contact with each other, and space portions are provided in close contact with each other. It has a feature made to support both side walls of the groove.

The super multi-fiber optical cable having a fold unit according to the present invention has both side walls and bottom surfaces integrally formed, and an upper portion thereof is provided with an open space portion, and a predetermined inclined surface is formed at both bottom corners thereof to form a spiral on the outer peripheral surface of the multi slot rod. Between a plurality of fold units installed in the installation, the space portion of the fold unit, there are a plurality of inner film grooves are inserted into a plurality of optical fiber ribbons stacked therein, and between both fold units to be supported by the inclined surface of the fold unit It is installed in, and has a feature consisting of a plurality of outer film grooves to be inserted to be stacked in a plurality of optical fiber ribbons.

The ultra multi-core optical cable having a fold unit according to the present invention has a feature that the bottom surface of the fold unit has a predetermined radius of curvature and is installed in close contact with the outer circumferential surface of the multi slot rod.

Hereinafter, preferred embodiments of the fold unit according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view showing a state in which the optical fiber ribbon is installed in the fold unit according to the present invention.

Referring to this, the fold unit 10 is provided with a space in which both side wall surfaces 11 and the bottom surface 13 are integrally formed so that a plurality of inner film grooves 20 are in close contact with each other.

In addition, the bottom surface 14 of the fold unit 10 is made of a predetermined radius of curvature to be in close contact with the outer circumferential surface of the multi-slot rod when installed in the optical cable, the predetermined inclined surface 15 is provided on both side bottom corners. One outer film groove may be further installed between adjacent fold units 10.

At this time, the fold unit 10 is made of a polyester resin having a relatively large Young's modulus having sufficient strength to cope with external force.

In addition, the inner film groove 20 and the outer film groove is made of the same structure, the side wall surface 21 is made in a very thin form so as to minimize the gap between the groove and the groove.

The working example of the fold unit according to the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view showing an optical fiber ribbon installed in the fold unit according to the present invention.

Referring to this, the fold unit 10 is provided with a space portion in which a plurality of inner film grooves 20 are installed in close contact with each other, and the inner film grooves installed in the fold unit 10. Since the side wall surfaces 21 are manufactured in a very thin form, the gap between the grooves and the grooves into which the plurality of optical fiber ribbons 30 are inserted to be stacked is minimized.

In addition, a predetermined inclined surface 15 is formed at both bottom corners of the fold unit 10 so as to further install one outer film groove 25 between the fold units 10 adjacent to each other.

At this time, the fold unit 10 is made of a relatively large material (young`s modulus) is able to withstand the external force acting sufficiently.

Hereinafter, a preferred embodiment of an ultra multi-core optical cable having a fold unit according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view of an ultra multi-core optical cable having a fold unit according to the present invention.

Referring to this, in the multi-core optical cable, a plurality of grooves 42 having a predetermined depth are spirally formed along the outer circumferential surface of the multi-slot rod 40, and a plurality of optical fiber ribbons 30 are formed in the grooves 42. It is inserted to be stacked, and a central tensile line 41 made of steel wire or high strength synthetic fiber is inserted on the central axis so as to correspond to an external force.

In addition, a predetermined waterproofing layer 43 is formed on an outer circumferential surface of the multi-slot rod 40, and a plurality of fold units 10 are disposed on the outer surface of the waterproofing layer 43 at predetermined intervals to spirally extend along a longitudinal direction. The fold unit 10 has a pair of inner film grooves 20 in which a plurality of optical fiber ribbons 30 are stacked to be stacked, and a fold unit 10 is interposed between the fold units 10. One outer film groove 25 supported by the inclined surface 15 on both bottom surfaces of the bottom) is further provided.

In addition, the bottom surface 14 of the fold unit 10 has a predetermined radius of curvature so as to be in close contact with the outer circumferential surface of the multi slot rod 40.

At this time, the fold unit 10 is made of polyethylene-based synthetic resin of relatively large Young's modulus having a sufficient strength to correspond to the external force, the film grooves 20, 25 inside and outside the groove between the groove and the groove Both side walls (21, 26) are formed very thin so as to minimize the interval between.

An outer layer of the optical cable is formed on an outer circumferential surface of the fold unit 10. The outer layer has a waterproof layer 44 coated with a waterproof tape to prevent moisture penetration therein, and an external impact force on the outer circumferential surface of the waterproof layer 44. The metal coating layer 45 made of aluminum or steel is formed so as to correspond to the shape, and the polyethylene (PE) coating layer 46 is formed on the outermost layer.

Referring to the operation of the ultra-multi-core optical cable having a fold unit according to the present invention by the above configuration in detail as follows.

The ultra-concentric optical cable is installed in a pair of inner film grooves 20 in close contact with each other in the fold unit 10 arranged in a spiral, such a pair of inner film grooves 20 are both side wall surfaces Since the 21 is formed very thin, the gap between the groove and the groove into which the plurality of optical fiber ribbons 30 are inserted to be stacked is minimized.

In addition, a predetermined inclined surface 15 is provided on both bottom surfaces of the fold unit 10 to support both side wall surfaces 26 of the outer film groove 25 located between adjacent fold units 10. One outer film groove 25 is further installed.

In addition, both side wall surfaces 10 of the fold unit 10 are made of a material having a relatively large Young's modulus to sufficiently withstand the external force acting.

According to the present invention, a pair of inner film grooves are installed inside a plurality of fold units arranged on an outer circumferential surface of a multislot rod, and the fold unit and the ultra multi-core optical cable having the same are provided in the inner film groove. Since a plurality of optical fiber ribbons are stacked to be stacked, the gap between the grooves into which the optical fiber ribbons are inserted is minimized, thereby significantly increasing the optical fiber density of the optical cable.

In addition, a predetermined inclined surface is provided on both bottom surfaces of the fold unit to support both side wall surfaces of the outer film grooves located between adjacent fold units, so that one outer film groove is installed to further increase the optical fiber density of the optical cable. Will increase.

Claims (3)

Both side wall surfaces 11 and bottom surface 13 are integrally formed, and a space portion is provided in which a plurality of inner film grooves 20 are in close contact with each other. A predetermined inclined surface 15 is provided at both bottom corners. The fold unit is formed to support both side wall surfaces (26) of the outer film groove (20). In a super multi-core optical cable having a multi-slot rod 40, Both side wall surfaces 11 and bottom surface 13 are integrally formed so that the upper portion is provided with an open space portion, and a predetermined inclined surface 15 is formed at both corners of the bottom surface so as to spirally form the outer peripheral surface of the multi slot rod 40. A plurality of fold units 10 installed; A plurality of inner film grooves 20 installed in the space portion of the fold unit 10 and having a plurality of optical fiber ribbons 30 inserted therein; A plurality of outer film grooves 25 are installed between both fold units 10 so as to be supported by the inclined surface 15 of the fold unit 10, and a plurality of optical fiber ribbons 30 are inserted to be stacked therein. Ultra-multi-core optical cable having a fold unit, characterized in that consisting of. The method of claim 2, The bottom surface (14) of the fold unit (10) is made of a predetermined radius of curvature, the multi-core optical cable having a fold unit, characterized in that made to be in close contact with the outer peripheral surface of the multi-slot rod (40).