Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical fiber cable

A technology for optical cables and cable cores, which is applied in cables, optics, light guides, etc., and can solve problems such as multi-time, fiber cutting, etc.

Pending Publication Date: 2021-09-07
NIPPON TELEGRAPH & TELEPHONE CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using a special tool, that is, a high-strength cable sheath knife to tear off the metal sheath, the optical fiber housed in the cable core 51 may also be cut due to excessive cutting of the blade of the tool.
In addition, the operation of tearing the metal sheath while making fine adjustments so that the blade does not cut too much requires a high degree of skill, and the operation takes a lot of time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber cable
  • Optical fiber cable
  • Optical fiber cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0072] pass figure 2 An example of the cross-sectional structure of the optical cable according to the present disclosure will be described. exist figure 2Among them, 11 is the cable core, 12 is the inner sheath, 13 is the metal sheath, 14 is the outer sheath, and 15 is the outer sheath tear line. The cable core 11 is arranged at the center of the optical cable and gathers a plurality of optical fibers. The inner sheath 12 is disposed on the outer periphery of the cable core 11 and covers the cable core 11 . The inner jacket 12 may have a tension member that protects the optical fiber against tension applied to the cable. Examples of the material of the inner sheath 12 include polyethylene, flame-retardant polyethylene, polyvinyl chloride, and the like. The cable core 11 and the inner sheath 12 are collectively referred to as a cable body. The metal sheath 13 is disposed on the outer periphery of the inner sheath 12 and wound around the inner sheath 12 . As a material ...

Embodiment approach 2

[0076] pass image 3 An example of the cross-sectional structure of the optical cable according to the present disclosure will be described. exist image 3 Among them, 11 is the cable core, 12 is the inner sheath, 13 is the metal sheath, 14 is the outer sheath, and 15 is the outer sheath tear line. The outer sheath tear line 15 may be at least partially embedded in the outer peripheral surface of the inner sheath 12 . That is, a part of the outer sheath tear line 15 may be embedded in the inner sheath 12 and a part may be exposed from the inner sheath 12 , or the entire outer sheath tear line 15 may be embedded in the inner sheath 12 . like image 3 As shown, partially embedded means that a part of the tear line 15 of the outer sheath is embedded in the inner sheath 12 in a cross section perpendicular to the longitudinal direction of the optical cable.

[0077] By making at least a part of the outer sheath tear line 15 be buried in the inner layer sheath 12, the outer shea...

Embodiment approach 3

[0079] pass Figure 4 An example of the cross-sectional structure of the optical cable according to the present disclosure will be described. exist Figure 4 Among them, 11 is the cable core, 12 is the inner sheath, 13 is the metal sheath, 14 is the outer sheath, 15 is the tear line of the outer sheath, and 16 is the tear line of the inner sheath. The optical cable of the present disclosure includes at least one inner jacket tear line 16 disposed along the length direction inside the layer of the inner jacket 12 and tearing the inner jacket 12 .

[0080] Figure 4 The optical cable shown is an example in which the inner sheath tear line 16 is further provided in addition to the optical cable described in the first embodiment. It is only necessary to have at least one inner sheath tear line 16, or there may be a plurality of them. By having the inner sheath tear line 16, the inner sheath 12 can be easily torn.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The purpose of the present disclosure is to facilitate cutting and tearing of a metal sheath even an optical fiber cable has the metal sheath. An optical fiber cable according to the present disclosure is provided with: a cable core which is disposed on a central section and in which a plurality of optical fibers are aggregated; an inner layer sheath which is disposed on the outer periphery of the cable core and covers the cable core; a metal sheath which is disposed on the outer periphery of the inner layer sheath and is wound around the inner layer sheath; an outer layer sheath which is disposed on the outer periphery of the metal sheath and covers the metal sheath; and at least one outer sheath cut and tear string which is longitudinally disposed inside the metal sheath.

Description

technical field [0001] The present disclosure relates to an optical cable capable of protecting a cable core even if bitten by an animal, and capable of easily taking out the optical cable of the cable core. Background technique [0002] For the damaged area where the optical fiber is damaged due to the knocking of birds such as woodpeckers or the biting of animals such as squirrels, an optical cable against birds, insects and animals with a metal sheath inside is used (for example, refer to Patent Document 1. ). exist figure 1 The cross-sectional structure of the related optical cable will be described. exist figure 1 Among them, 51 is a cable core, 52 is a metal sheath, and 53 is a polyethylene sheath. The optical cable for birds, insects and animals is composed of a cable core 51, a metal sheath 52 covered so as to cover the cable core 51, and a polyethylene jacket 53. Since the optical cable has a metal sheath 52, in order to reach the cable core 51 from the optical...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
CPCG02B6/443G02B6/4431H01B7/18H01B7/385
Inventor 丸尾勇太谷冈裕明泉田史山田裕介铁谷成且远藤洋平
Owner NIPPON TELEGRAPH & TELEPHONE CORP