KR100308503B1 - Cross groove and super multi-fiber cable with it - Google Patents

Abstract

The present invention relates to a cross groove and an ultra multi-fiber optical cable having the same, and an object thereof is to install a plurality of optical fiber ribbons stacked in each quadrant, thereby minimizing the space of the space required between the grooves and the grooves, thereby significantly increasing the optical fiber density. To ensure that

The cross groove according to the present invention is formed in a spiral shape having a predetermined pitch about a central axis of the cross section in a cross-sectional shape formed in a cross shape, and is capable of inserting a plurality of optical fiber ribbons stacked in each quadrant of the cross section. Has

The super multi-fiber optical cable having a cross groove according to the present invention includes a cross groove formed of a spiral having a predetermined pitch about a central axis of a cross section, an optical fiber ribbon inserted into each quadrant of the cross groove, and the optical fiber ribbon inserted therein. A plurality of units formed by forming a predetermined coating layer on the outer circumferential surface of the cruciform groove has a feature of being spirally installed along the outer circumferential surface of the center tensile line.

According to the present invention, the cross-groove and the super multi-core optical cable having the same are provided so that a plurality of optical fiber ribbons are stacked on each quadrant divided by a cross section, so that no space of a space is required between adjacent grooves and grooves. The density can be significantly improved.

Description

Cross groove and super multi-fiber cable with it

The present invention relates to a cross groove and a multi-core optical cable having the same. More specifically, a cross groove in which a plurality of optical fiber ribbons are stacked in each quadrant, and a plurality of units having such grooves are spirally wound around a center tensile line. The present invention relates to a super multi-fiber optical cable arranged to increase the optical fiber density of the optical cable.

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, the optical cable installed through the conduit should be formed to a predetermined diameter so that it can be installed through the installed conduit.

1 is a cross-sectional view of a conventional ultra multi-core optical cable, and FIG. 2 is a cross-sectional view showing a modification of the conventional ultra multi-core optical cable.

Referring to this, the multi-core optical cable has a plurality of grooves 51 having a predetermined depth spirally formed along the outer circumferential surface of the multi-slot core 50 located inside a predetermined sheath, and a plurality of optical fibers in the groove 51 The ribbon 53 is inserted to be stacked, and a central tensile line 31 made of iron wire or synthetic fiber is inserted on the central axis to correspond to an external force.

At this time, since the groove 51 is formed with a predetermined width and depth along the outer circumferential surface of the multi-slot core 50, the space between the grooves 51 and the grooves 51 becomes wider in the radially outward direction. This space must always be kept above a certain width to form the grooves 51.

Therefore, when the width of the groove 51 is widened to increase the core bow of the optical fiber ribbon 53 inserted into the groove 51, the center of the multislot core 50 in which the tensile line 31 is positioned is located. Since the space becomes wider, the fiber ribbon 53 of 8 or 12 cores is usually inserted.

Also, in recent years, as the number of subscribers increases, more ultra-high optical cables are required. For this purpose, the multi-slot core 50 has a multi-layer structure, or the U groove 60 is formed on the outer circumferential surface of the multi-slot core 50 of one layer. ) Is arranged in a spiral manner to insert a plurality of optical fiber ribbons 63 in the U groove 60 to be stacked, thereby manufacturing an optical cable having more optical fiber cores.

However, when the multi-slot core 50 is formed in a multi-layered structure, a margin having a predetermined thickness for forming the grooves 51 in the multi-slot core 50 is required, and the margin increases the diameter of the optical cable. It becomes a factor.

The main object of the present invention is to provide a cross-shaped groove which can minimize the space of the space between adjacent grooves and grooves by stacking a plurality of optical fiber ribbons in each quadrant.

It is another object of the present invention to provide a super multi-core optical cable having a cross-shaped groove, which can significantly increase the optical fiber density of the optical cable by minimizing the space of the necessary space between adjacent grooves and the groove by using the cross-shaped groove.

Another object of the present invention is to install a triangular slot rod in the space between each unit, and by inserting a plurality of optical fiber ribbons stacked in the groove of the slot rod, to further increase the optical fiber density by utilizing the space of the space inside the optical cable To provide a multi-core optical cable having a cross-shaped groove that can be made.

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

2 is a cross-sectional view showing a modification of the conventional ultra multi-core optical cable,

3 is a cross-sectional view showing a state in which the optical fiber ribbon is inserted into the cross-shaped groove according to the present invention,

4 is a cross-sectional view showing a state in which an optical fiber ribbon is inserted into a modified example of the cross groove according to the present invention;

5 is a perspective view of a super multi-core optical cable having a cross groove according to the present invention;

6 is a cross-sectional view of a super multi-core optical cable having a cross groove according to the present invention;

7 is a perspective view of a variant of a super multi-core optical cable having a cross groove according to the present invention;

8 is a cross-sectional view of a variant of a super multi-core optical cable having a cross groove according to the present invention;

9 is a perspective view of a super multi-core optical cable having a modification of the cross-shaped groove according to the present invention,

10 is a cross-sectional view of a super multi-core optical cable having a modification of the cross groove according to the present invention;

11 is a perspective view of a variant of a super multi-core optical cable having a modification of the cross groove according to the present invention;

12 is a cross-sectional view of a variant of a multicore fiber optic cable having a modification of the cross groove according to the present invention.

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

10: unit 11: cross section

12: quadrant 20: unit

21: cross-section 22: groove

31: center liner 33: intermission

40: triangular slot rod 41: groove

42: protrusion

The cross groove according to the present invention is formed in a spiral shape having a predetermined pitch about a central axis of the cross section in a cross-sectional shape formed in a cross shape, and is capable of inserting a plurality of optical fiber ribbons stacked in each quadrant of the cross section. Has

Variations of the cross groove according to the present invention is a plurality of grooves in a state in which a plurality of grooves formed so that the cross-section is bent at a right angle so that a plurality of optical fiber ribbons can be inserted to be stacked in a state where one end end is gathered at a central angle. At the same time has a feature formed in a spiral of a predetermined pitch.

In a variation of the cross-shaped groove according to the present invention, the plurality of grooves are characterized by four grooves each disposed at a 90 degree angle and arranged in a mandrel shape.

In the multi-core optical cable having a cross-shaped groove according to the present invention is a multi-core optical cable is arranged in the longitudinal direction along the central axis in the longitudinal direction, the cross-shaped groove made of a spiral of a predetermined pitch around the central axis of the cross-section, and The optical fiber ribbon inserted into each quadrant of the cross groove and the plurality of units formed by forming a predetermined coating layer on the outer circumferential surface of the cross groove in which the optical fiber ribbon is inserted are spirally installed along the outer circumferential surface of the center tensile line. .

In the ultra multi-core optical cable having a cross-shaped groove according to the present invention, each unit has a feature of providing an intervening core or a waterproof yarn for maintaining the appearance of the optical cable.

In the multi-core optical cable having a cross-shaped groove according to the present invention, between each unit protrudes with a radius of curvature of the unit, and on the opposite side of the protrusion, a triangular slot rod having a groove having a predetermined depth is inserted so that a plurality of optical fiber ribbons are stacked and inserted. Has characteristics.

In the multi-core optical cable having a cross-shaped groove according to the present invention, the center cable in the longitudinal direction is disposed along the center axis in the longitudinal direction of the multi-core optical cable, the cross section is bent at a right angle and a plurality of grooves in which a plurality of optical fiber ribbons are inserted The plurality of grooves are simultaneously formed in a spiral of a predetermined pitch while the ends are brought into contact with each other at a predetermined angle so as to be gathered at the center, and a plurality of units formed with a predetermined coating layer on an outer circumferential surface thereof are connected to each other along the outer circumferential surface of the center tensile line. Has a feature arranged in a spiral.

In the multi-core optical cable having a cross groove according to the present invention, the plurality of grooves are characterized by four grooves each disposed at a 90 degree angle and arranged in a mandrel shape.

In the ultra multi-core optical cable having a cross-shaped groove according to the present invention, each unit has a feature of providing an intervening core or a waterproof yarn for maintaining the appearance of the optical cable.

In the multi-core optical cable having a cross-shaped groove according to the present invention, each of the units protrudes with a radius of curvature between the units, and on the opposite side of the protrusion, a triangular slot rod having a groove having a predetermined depth is inserted so that a plurality of optical fiber ribbons are stacked and inserted. Has characteristics.

Hereinafter, preferred embodiments of the cross-shaped groove according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view illustrating a state in which an optical fiber ribbon is inserted into a cross groove according to the present invention.

Referring to this, the cross-shaped groove is formed by twisting spirally so that the cross-section 11 has a predetermined pitch about the central axis in a state in which the cross-section 11 is formed cross-shaped '+' and extends in the longitudinal direction.

A plurality of 16-core optical fiber ribbons 13 are inserted into each quadrant 12 (one to four quadrants) of the cross groove.

As described above, one unit 10 is formed on the outer circumferential surface of the cross-shaped groove in which the plurality of optical fiber ribbons 13 are inserted in each quadrant 12, and the coating layer 15 coated with the waterproof tape is embedded in the ultra-concentric optical cable. Is used.

Referring to the working example of the cross-shaped groove according to the present invention by the above configuration as follows.

The cross-shaped groove is formed so that the cross-section 11 is cross-shaped (+) so that a plurality of optical fiber ribbons 13 can be stacked in each quadrant 12 (one to two quadrants). The optical fiber density is remarkably improved because the space between the grooves is not required between the quadrants 12 into which (13) is stacked to be inserted, as in a conventional multislot core or U groove.

Hereinafter, a modification of the cross groove according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a cross-sectional view showing a state in which the optical fiber ribbon is inserted in the modified example of the cross groove according to the present invention.

Referring to this, in the modified example of the cross-shaped groove, only four grooves 22 having a cross-section 21 bent at right angles and formed in an L-shape so that one end thereof is in contact with each other in the center of the cross-shaped groove are positioned only in the shape of a mandrel. (Iii) It is twisted at a predetermined pitch around the center of the ruler to form a spiral shape.

At this time, since the four grooves 22 are each disposed at an angle of 90 degrees to maintain the shape of the manza as a whole, the U-shaped grooves opened toward the outer circumferential surface are formed at 90 degrees to each other to form a plurality of 16-core optical fibers. The ribbon 23 can be inserted to be stacked.

The coating layer 25 coated with the waterproof tape is formed on the outer circumferential surface of the four grooves 22 into which the plurality of optical fiber ribbons 23 are stacked to be used as one unit 20 embedded in the ultra-concentric optical cable.

Referring to the working example of the cross-shaped groove modification according to the present invention by the above configuration in detail as follows.

In the modified example of the cross-shaped groove, a plurality of 16-core optical fiber ribbons 23 are stacked in a U-shaped groove open toward the outer circumferential surface while four grooves 22 having a L-shape are positioned in a man-shaped shape. Space between the grooves, as in the existing multi-slot core or U grooves, between the grooves 22 installed at an angle of 90 degrees to which the optical fiber ribbons 23 are stacked to be inserted. Since this is unnecessary, the optical fiber density can be remarkably improved.

In addition, in the modification of the cross groove, since the cross section of each groove 22 is formed at a right angle 21, even if an external force acts on the unit 20, the angle formed in the tangential direction of the unit 20 is determined. It is possible to prevent the external force from being applied to the optical fiber ribbon 23 by the wall surface of the groove 22.

Hereinafter, with reference to the accompanying drawings for the ultra multi-core optical cable having a cross-shaped groove according to the present invention will be described in detail.

5 is a perspective view of a super multi-core optical cable having a cross groove according to the present invention.

Referring to this, the ultra-multi-core optical cable is arranged in the longitudinal direction along the central axis in the longitudinal direction, and the spiral in a predetermined pitch so that the plurality of units 10 are connected to each other on the outer peripheral surface of the central tension line 31. Interposed between the unit 10, the interposition shim 33 or the waterproof yarn is inserted to maintain the appearance of the optical cable, a predetermined coating layer is formed on the outer surface.

Each unit 10 has a cross-sectional groove 11 formed therein so that a cross-shaped groove is formed in a spiral shape having a predetermined pitch about the center line of the cross-section 11, and inserted into each quadrant 12 of the cross-shaped groove. A plurality of optical fiber ribbons 13 and a predetermined coating layer 15 are formed on the outer circumferential surface of the cross-shaped groove with a waterproof tape.

An interposition shim 33 or a waterproof yarn is inserted between each unit 10 so that the optical cable can maintain a circular shape.

The coating layer of the outer surface of the optical cable is formed of a waterproof layer 35 coated with a waterproof tape to prevent moisture penetration therein, and made of aluminum or steel to mitigate moisture penetration and external impact on the outer peripheral surface of the waterproof layer 35. The formed metal coating layer 36 is formed, and a polystyrene (PE) coating layer 37 is formed on the outermost layer.

An example of the operation of the super multi-core optical cable having a cross groove according to the above configuration will be described in detail with reference to the accompanying drawings.

6 is a cross-sectional view of a super multi-core optical cable having a cross groove according to the present invention.

Referring to this, the multi-core optical cable is arranged in a spiral so that a plurality of units 10 are adjacent to each other on the outer peripheral surface of the center tensile line 31, each of the quadrants 12 of the cross-shaped groove (in each unit 10 ( A plurality of 16-core optical fiber ribbons 13 are inserted to be stacked in one quadrant to four quadrants.

At this time, the space between the grooves is not required between the quadrants 12 into which the optical fiber ribbons 13 are stacked so that the optical fiber density can be remarkably improved. do.

Hereinafter, a modified example of the ultra multi-core optical cable having a cross groove according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 7 is a perspective view of a variant of a super multi-core optical cable having a cross groove according to the present invention.

Referring to this, the ultra-multi-core optical cable is arranged in the longitudinal direction along the central axis in the longitudinal direction, and the spiral in a predetermined pitch so that the plurality of units 10 are connected to each other on the outer peripheral surface of the central tension line 31. A triangular slot rod 40 is installed between each unit 10 to further increase the optical fiber density, and a predetermined coating layer is formed on the outer surface of the optical cable.

Each unit 10 has a cross-sectional groove 11 formed therein so that a cross-shaped groove is formed in a spiral shape having a predetermined pitch about the center line of the cross-section 11, and inserted into each quadrant 12 of the cross-shaped groove. A plurality of optical fiber ribbons 13 and a predetermined coating layer 15 are formed on the outer circumferential surface of the cross-shaped groove with a waterproof tape.

The triangular slot rod 40 protrudes with a radius of curvature of the unit 10, and grooves 41 having a predetermined depth are formed on opposite sides of the protrusion 42 so that a plurality of optical fiber ribbons 43 are stacked.

Accordingly, a plurality of 16-core optical fiber ribbons 43 are inserted into the grooves 41 of the triangular slot rods 40, and a predetermined coating layer 45 is formed on the outer surface of the triangular slot rods 43 with a waterproof tape. ).

The coating layer of the outer surface of the optical cable is formed of a waterproof layer 35 coated with a waterproof tape to prevent moisture penetration therein, and made of aluminum or steel to mitigate moisture penetration and external impact on the outer peripheral surface of the waterproof layer 35. The formed metal coating layer 36 is formed, and a polystyrene (PE) coating layer 37 is formed on the outermost layer.

Referring to the accompanying drawings, the working example of the modification of the ultra multi-core optical cable having a cross groove according to the above configuration will be described in detail as follows.

8 is a cross-sectional view of a variant of an ultra multi-fiber optical cable having a cross groove according to the present invention.

Referring to this, the multi-core optical cable is arranged in a spiral so that a plurality of units 10 are adjacent to each other on the outer peripheral surface of the center tensile line 31, each of the quadrants 12 of the cross-shaped groove (in each unit 10 ( A plurality of 16-core optical fiber ribbons 13 are inserted to be stacked in one quadrant to four quadrants.

At this time, between the quadrants 12 into which the optical fiber ribbons 13 are stacked, the optical fiber density is remarkably improved because the space between the grooves is not required as in the conventional multislot core or the U groove.

In addition, when the plurality of optical fiber ribbons 43 are inserted to be stacked by arranging the triangular slot rods 40 in the spaces between the units 10, the optical fiber density inside the optical cable becomes higher.

Hereinafter, a super multi-fiber optical cable having a modification of the cross groove according to the present invention will be described in detail with reference to the accompanying drawings.

9 is a perspective view of a super multi-core optical cable having a modification of the cross groove according to the present invention.

Referring to this, the ultra-multi-core optical cable is arranged in the longitudinal direction along the central axis in the longitudinal direction, the spiral in a predetermined pitch so that a plurality of units 20 are connected to each other on the outer peripheral surface of the central tension line 31. It is installed, the interposition shim 33 or waterproof yarn is inserted between each unit 20, a predetermined coating layer is formed on the outer surface.

Each unit 20 has four grooves 22, each of which is bent at right angles in its cross section, in the shape of a manza so that one end thereof comes into contact with the center thereof. A plurality of 16-core optical fiber ribbons 23 are inserted into each of the grooves 22 in a spiral form with a predetermined pitch, and a coating layer 25 is formed on the outer circumferential surface of the four grooves 22 with a waterproof tape. .

At this time, since the four grooves 22 are each disposed at an angle of 90 degrees to maintain the shape of the manza as a whole, the U-shaped grooves opened toward the outer circumferential surface are formed at 90 degrees to each other to form a plurality of 16-core optical fibers. The ribbon 23 can be inserted to be stacked.

An interposition shim 33 or a waterproof yarn is inserted between each unit 20 so that the optical cable can maintain a circular shape.

The coating layer of the outer surface of the optical cable is formed of a waterproof layer 35 coated with a waterproof tape to prevent moisture penetration therein, and made of aluminum or steel to mitigate moisture penetration and external impact on the outer peripheral surface of the waterproof layer 35. The formed metal coating layer 36 is formed, and a polystyrene (PE) coating layer 37 is formed on the outermost layer.

The working example of the super multi-core optical cable having a modified example of the cross groove according to the above configuration will be described in detail with reference to the accompanying drawings.

10 is a cross-sectional view of a super multi-core optical cable having a modification of the cross groove according to the present invention.

Referring to this, the multi-core optical cable is arranged in a spiral so that a plurality of units 20 are adjacent to each other on the outer peripheral surface of the center tensile line 31, each of the four grooves 22 are each 90 Since it is disposed at an angle to maintain the shape of the manza as a whole, the U-shaped grooves opened toward the outer circumferential surface are formed at 90 degrees to each other, and a plurality of 16-core optical fiber ribbons 23 are inserted to be stacked.

Therefore, since the extra space is not required separately between the adjacent grooves 22 for forming the grooves 22 in each of the units 20, the optical fiber density is significantly increased.

In addition, since the cross-section 21 of each of the grooves 22 is bent at a right angle, the ultra-core fiber cable is formed in the tangential direction of the unit 20 even if an external force acts on each unit 20. It is possible to prevent the external force from being applied to the optical fiber ribbon 23 by the wall surface of (22).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a modified example of a super multi-core optical cable having a modified example of a cross groove according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 11 is a perspective view of a variant of a super multi-core optical cable having a modification of the cross groove according to the present invention.

Referring to this, the ultra-multi-core optical cable is arranged in the longitudinal direction along the central axis in the longitudinal direction, the spiral in a predetermined pitch so that a plurality of units 20 are connected to each other on the outer peripheral surface of the central tension line 31. A triangular slot rod 40 is installed between each unit 20 to further increase the optical fiber density, and a predetermined coating layer is formed on the outer surface of the optical cable.

Each unit 20 has four grooves 22, each of which is bent at right angles in its cross section, in the shape of a manza so that one end thereof comes into contact with the center thereof. A plurality of 16-core optical fiber ribbons 23 are inserted into each groove 22 in a spiral form having a predetermined pitch, and a coating layer 45 is formed on the outer circumferential surface of the four grooves 22 with a waterproof tape. .

At this time, since the four grooves 22 are each disposed at an angle of 90 degrees to maintain the shape of the manza as a whole, the U-shaped grooves opened toward the outer circumferential surface are formed at 90 degrees to each other to form a plurality of 16-core optical fibers. The ribbon 43 can be inserted to be stacked.

The triangular slot rod 40 protrudes with a radius of curvature of the unit 20 between each unit 20, and a groove having a predetermined depth so that a plurality of optical fiber ribbons 43 are stacked and inserted on the opposite side of the protrusion 42. 41 is formed.

Accordingly, a plurality of 16-core optical fiber ribbons 43 may be inserted into the grooves 41 of the triangular slot rods 40 in a stacked manner, and the triangular slot rods 40 may be coated with a waterproof tape on an outer surface of the triangular slot rods 40. Is formed.

The coating layer of the outer surface of the optical cable is formed of a waterproof layer 35 coated with a waterproof tape to prevent moisture penetration therein, and made of aluminum or steel to mitigate moisture penetration and external impact on the outer peripheral surface of the waterproof layer 35. The formed metal coating layer 36 is formed, and a polystyrene (PE) coating layer 37 is formed on the outermost layer.

The working example of the ultra-multicore optical cable variant having the modification of the cross groove according to the above configuration will be described in detail with reference to the accompanying drawings.

12 is a cross-sectional view of a variant of a multicore fiber optic cable having a modification of the cross groove according to the present invention.

Referring to this, the multi-core optical cable is arranged in a spiral so that a plurality of units 20 are adjacent to each other on the outer peripheral surface of the center tensile line 31, each of the four grooves 22 are each 90 Since they are arranged at an angle to maintain the shape of the manza as a whole, the U-shaped grooves opened toward the outer circumferential surface are formed at 90 degrees to each other.

Therefore, since the extra space is not required separately between the adjacent grooves 22 for forming the grooves 22 in each of the units 20, the optical fiber density is significantly increased.

In addition, since the triangular slot rod 40 is disposed in the space between the units 20 to form a plurality of optical fiber ribbons 43 to be stacked, the optical fiber density can be further increased.

In addition, since the cross-section 21 of each of the grooves 22 is bent at a right angle, the ultra-core fiber cable is formed in the tangential direction of the unit 20 even if an external force acts on each unit 20. It is possible to prevent the external force from being applied to the optical fiber ribbon 23 by the wall surface of (22).

According to the present invention, the cross grooves are provided so that a plurality of optical fiber ribbons are stacked on each quadrant divided by cross-sections, so that space between the adjacent grooves and the grooves is unnecessary, thereby significantly improving the optical fiber density. Can be.

In addition, the ultra-concentric optical cable having the cross-shaped groove has a triangular slot rod in the space between each unit, and inserts a plurality of optical fiber ribbons in the groove of the slot rod, thereby utilizing the space of the optical cable margin. It is possible to further increase the density.

Claims (10)

In the state where the cross section 11 is formed in a cross shape, the cross section 11 is formed in a spiral of a predetermined pitch about a central axis, and a plurality of optical fiber ribbons 13 are laminated on each quadrant 12 of the cross section 11. Cross-shaped grooves, characterized in that can be inserted so. The plurality of grooves 22 in a state in which a plurality of grooves 22 formed to be inserted at a right angle so that a plurality of optical fiber ribbons 23 can be inserted at a predetermined angle so that one end thereof is collected at a central portion thereof is bent. The cross-shaped groove, characterized in that formed at the same time in a spiral of a predetermined pitch. The method of claim 2, The plurality of grooves (22) is a cross-shaped groove, characterized in that the four grooves 22 are each positioned at a 90-degree angle and arranged in a mandrel shape. In the super multi-core optical cable in which the center tension line 31 is disposed in the longitudinal direction along the center axis, A cross groove formed of a spiral having a predetermined pitch about a central axis of the cross section, an optical fiber ribbon 13 inserted to be laminated on each quadrant 12 of the cross groove, and a cross groove in which the optical fiber ribbon 13 is inserted A super multi-core optical cable having a cross-shaped groove, characterized in that a plurality of units (10) having a predetermined coating layer (15) formed on an outer circumferential surface thereof are spirally installed along the outer circumferential surface of the center tension line (31). The method of claim 4, wherein An ultra multi-core optical cable having a cross-shaped groove, wherein an interposing core 33 or a waterproof yarn is provided between the units 10 to maintain the appearance of the optical cable. The method of claim 4, wherein A triangular slot between the units 10 protrudes with a radius of curvature of the unit 10, and a groove 41 having a predetermined depth is formed on the opposite surface of the protrusion 42 so that a plurality of optical fiber ribbons 43 are stacked and inserted. Ultra-concentric optical cable having a cross groove, characterized in that the rod 40 is fitted. In the super multi-core optical cable in which the center tension line 31 is disposed in the longitudinal direction along the center axis, The plurality of grooves 22 are simultaneously folded at a predetermined angle in a state in which a plurality of grooves 22 into which a plurality of optical fiber ribbons 23 are inserted are folded at a predetermined angle so that one end thereof is collected at a central portion. It is formed in a spiral of the pitch, the outer surface of the cross-shaped groove, characterized in that a plurality of units 20 formed with a predetermined coating layer 25 is arranged in a spiral so as to be connected to each other along the outer peripheral surface of the center tension line 31. Multi-core optical cable with. The method of claim 7, wherein The plurality of grooves (22) is a super multi-core optical cable having a cross-shaped groove, characterized in that the four grooves (22) which are each positioned at a 90-degree angle and arranged in a mandrel shape. The method of claim 7, wherein Between the units 20, the super-core optical cable having a cross-shaped groove, characterized in that the interposing core (33) or waterproof yarn for maintaining the appearance of the optical cable is provided. The method of claim 7, wherein A triangular slot between the units 20 protrudes with a radius of curvature of the unit 20, and grooves 41 having a predetermined depth are formed on the opposite side of the protrusion 42 to insert and insert a plurality of optical fiber ribbons 43. Ultra-concentric optical cable having a cross groove, characterized in that the rod 40 is fitted.