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KR-20260068049-A - Intermittent connection ribbon for optical cables and manufacturing equipment thereof

KR20260068049AKR 20260068049 AKR20260068049 AKR 20260068049AKR-20260068049-A

Abstract

The present invention relates to an intermittent splicing ribbon for an optical cable, wherein the diameters of the individual optical fibers are all the same, the diameter (L) of the individual optical fibers and the center-to-center distance (s) between adjacent optical fibers are the same, and the plurality of splicings are formed only in the valleys on one side of the intermittent splicing ribbon for the optical cable and are repeatedly patterned by being spaced apart in the longitudinal and width directions of the optical fibers when viewed in a planar view, wherein the lengths of the plurality of splicings are all the same, the spacing between two adjacent splicings in a straight line along the longitudinal direction of the optical fibers is all the same, the offset spacing between any one splicing and an adjacent splicing in the width direction is the same, and the offset spacing, which is the longitudinal spacing of the adjacent splicings, is greater than 0, and the plurality of splicings have different distances from each other with respect to a vertical barcode line marked on the optical fiber.

Inventors

  • 조근식
  • 황인성
  • 박용찬
  • 구영권
  • 허재관

Assignees

  • 가온전선 주식회사

Dates

Publication Date
20260513
Application Date
20260430

Claims (10)

  1. Multiple optical fibers arranged in parallel and An intermittent splicing ribbon for an optical cable comprising a plurality of splicing portions formed in a groove formed between the plurality of optical fibers and intermittently splicing the plurality of optical fibers in a parallel direction, The diameters of the individual optical fibers of the intermittent splicing ribbon, including the core, clad layer, and outer layer, are all the same, and the diameter (L) of the individual optical fiber and the center-to-center distance (s) between adjacent optical fibers are the same, and The above multiple joints are formed only in the grooves on one side of the intermittent joint ribbon for the optical cable, and when the optical fibers are viewed in a planar view, they are spaced apart in the longitudinal and width directions of the optical fibers and formed as a repeating pattern, The lengths of the above multiple joints are all the same, and The spacing between two adjacent junctions along a straight line along the longitudinal direction of the optical fiber is all the same, and The offset spacing between any one of the above-mentioned joints and neighboring joints located adjacent in the width direction is the same, and The offset spacing, which is the longitudinal spacing of adjacent joints, exceeds 0, but An intermittent splicing ribbon for an optical cable, characterized in that the plurality of splicing portions have different distances from each other with respect to a vertical barcode line marked on the optical fiber.
  2. In Article 1, The above joint is, An intermittent bonding ribbon for an optical cable, characterized by being formed on one side of an optical fiber by at least two nozzle units comprising a plurality of nozzles having a structure in which n-1 nozzles are arranged in parallel to discharge bonding resin in an inkjet manner between n optical fibers (n is an integer greater than or equal to 2).
  3. In Article 2, In the above nozzle unit, The spacing (q) between adjacent nozzles among at least two nozzles arranged side by side in a parallel direction is an integer multiple of the center-to-center distance (s) between optical fibers, such that 2s ≤ q ≤ 6s, and The spacing q between adjacent nozzles within all the above nozzle units is the same, and When the number of the above nozzle units is let m (where m is an integer greater than or equal to 2), in relation to the number of the above optical fibers n, n/m has an integer value greater than or equal to 2, and The above at least two nozzle units are, An intermittent splicing ribbon for an optical cable characterized by being spaced apart along the longitudinal direction on the transport path of the intermittent splicing ribbon for an optical cable transported in the longitudinal direction of the optical fiber, and also spaced apart by an integer multiple of the distance (s) between the centers of the optical fibers along the width direction of the intermittent splicing ribbon for an optical cable, and positioned on the upper part of the intermittent splicing ribbon for an optical cable to form the plurality of splicing portions under set conditions.
  4. In Paragraph 3, An intermittent splicing ribbon for an optical cable, characterized in that the length of the splicing portion is greater than 15 mm and less than or equal to 20 mm.
  5. In Article 4, The spacing between two adjacent joints in a straight line along the longitudinal direction of the optical fiber is 30 mm to 50 mm, and An intermittent splicing ribbon for an optical cable, characterized in that the spacing between one end of the longitudinal direction of a splicing arranged in a straight line among the plurality of splicings and one end of the longitudinal direction of an adjacent splicing is greater than 45 mm and less than or equal to 70 mm.
  6. In Article 5, An intermittent joining ribbon characterized in that the offset interval, which is the distance between one of the multiple joining portions and one end of the longitudinal direction of the joining portions arranged adjacently in the width direction, is half the length of the joining portion.
  7. In Article 6, An intermittent splicing ribbon characterized in that the number of splicing portions on a cross-sectional area in the width direction at any position perpendicular to the longitudinal direction of the intermittent splicing ribbon composed of the plurality of optical fibers is at least 2 and at most 4.
  8. In Article 7, An intermittent splicing ribbon for an optical cable, characterized in that the splicing portion has a position higher than the center (P) of the optical fiber and lower than the top of the optical fiber based on the cross-section of the optical fiber.
  9. In Article 8, The plurality of optical fibers within one of the intermittent splicing ribbons for the optical cable include a coating layer coated with pigments of different colors, and An intermittent splicing ribbon for an optical cable, characterized in that the diameter of the optical fiber including the coating layer is 250㎛±5㎛, and the center-to-center distance between adjacent optical fibers among the plurality of optical fibers is the same as the diameter of the optical fiber.
  10. A manufacturing apparatus for an intermittent splicing ribbon for an optical cable according to any one of claims 1 to 9, A supply unit that supplies multiple optical fibers, each containing a pigment coating layer of a different color, wound on a plurality of payoff drums; An alignment unit that arranges a plurality of optical fibers drawn from the above supply unit in parallel, such that the width is a multiple of n of the number of optical fibers relative to the diameter (L) of the optical fibers; A bonding resin dispensing unit comprising n-1 or more nozzles formed on the upper portion of a transport means for transporting the optical fibers in the longitudinal direction to intermittently connect the optical fibers aligned in the alignment unit in a parallel direction, and dispensing a photocurable bonding resin to form a plurality of bonding units between the optical fibers; A light irradiation curing unit that cures and bonds the bonding resin intermittently discharged in the longitudinal and width directions of the optical fibers aligned by the bonding resin discharge unit; and A manufacturing apparatus for an intermittent spliced ribbon for an optical cable, characterized by including an analysis unit for inspecting an optical fiber that has passed through the light irradiation curing unit.

Description

Intermittent connection ribbon for optical cables and manufacturing equipment thereof The present invention relates to an intermittent spliced ribbon for an optical cable, wherein a plurality of optical fibers arranged in parallel are intermittently spliced into a flat ribbon shape to have bending flexibility in the width direction. In general, the demand for optical cables is continuously increasing in the construction of ultra-high-speed transmission networks because they offer greater bandwidth and smaller weight and volume compared to copper cables. Recently, with the spread of 5G communication technology and the increase in data centers, there is a demand for high-density optical cables with a large number of optical fibers per unit area. Meanwhile, the optical cable may be provided with a cable core composed of a plurality of optical fibers inside a cable jacket, and the cable core may be configured to include a plurality of optical units grouped into a certain unit. The optical unit has a form in which multiple optical fibers are aggregated by means of a tube or a binding thread that binds the outer periphery, and the optical unit may also be configured to include a ribbon that forms a single transmission unit with multiple optical fibers. A ribbon is a term referring to an optical fiber transmission unit in which 4, 6, 12 or other predetermined number of optical fiber strands are arranged transversely and combined into a flat ribbon shape. Conventional ribbons were generally manufactured by coating the outer circumferences of multiple optical fiber strands together while they were arranged side by side in a transverse/parallel direction. Conventional ribbons manufactured in this manner have a flat ribbon shape; therefore, when manufacturing an optical fiber unit by arranging multiple ribbons inside a tube, the ribbons are stacked to form a square cross-section, which creates a significant gap inside the optical cable, which typically has a circular cross-section, resulting in a disadvantage of increasing the overall diameter. To address this, a flexible ribbon for optical cables has been proposed that has a basic structure in the form of a flat ribbon bundled into a certain number of transmission units, while also having folding flexibility in the ribbon width direction to minimize air gaps in the assembled state. The above ribbon may take the form of a plurality of optical fibers arranged side by side in a parallel direction rolled up in the width direction, and may be received in a tube constituting the optical unit or bound in an assembled state. At this time, the plurality of optical fibers have a configuration in which they are intermittently joined to each other by a bonding material so that they can be easily rolled in the width direction, or so that the ribbon unit can be firmly maintained even in a rolled state. However, if various factors such as the splicing area, splicing location, and splicing spacing between optical fibers are not mutually optimized by the splicing material, there is a problem where the rolling process becomes difficult due to the bonding strength of each optical fiber, or conversely, the intermittently spliced optical fibers scatter, making stripping and splicing difficult. To elaborate, if excessive bonding material is used, increasing the bonding area or making the bonding spacing denser, the bonding strength between optical fibers can be increased, but this presents the problem of making the rolling process difficult. Conversely, if the bonding area is reduced or the bonding spacing is increased, the rolling process of the optical fibers may be facilitated, but the individual strands of the fibers may move independently, making stripping and splicing operations difficult. Accordingly, the applicant developed the present invention to solve the above-mentioned problems, and a related prior art document is Japanese Registered Patent No. 6657976, 'Intermittent connection type optical fiber ribbon and optical cable'. FIG. 1 is a plan view of an intermittent splicing ribbon for an optical cable according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of the ribbon shown in FIG. 1, viewed from the front. FIG. 3 is an enlarged view of a portion of one side in the longitudinal direction of the ribbon shown in FIG. 1. FIG. 4 is a perspective view of an intermittent bonding ribbon for an optical cable according to one embodiment of the present invention. FIG. 5 is a plan view showing the arrangement relationship between a nozzle unit and a first light irradiation unit according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be manifested in various different for