Forming tool, optical fiber unit manufacturing method, and optical fiber cable manufacturing method
A technology of forming tools and manufacturing methods, applied in the direction of fiber mechanical structure, etc., can solve the problems of optical fiber transmission characteristics reduction, disconnection, fiber protrusion, etc.
Active Publication Date: 2019-02-22
FUJIKURA LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in such a method, since the optical fiber bundle is not guided, the optical fiber protruding from the optical fiber bundle may be caught by the overlapped portion of the compressive tape when the optical fiber bundle is wrapped in a helical shape, and the optical fiber may be broken. , or the possibility of fibers protruding from the tape
As a result, there is a possibility that the transmission characteristics of the optical fiber will be reduced
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
no. 2 approach
[0083] In the first embodiment, at the position of the outlet 43 of the guide tube 40 , the inner diameter of the spiral portion 55 needs to be larger than the outer diameter of the outlet 43 of the guide tube 40 . That is, in the first embodiment, the inner diameter of the spiral portion 55 is limited by the outer diameter of the guide tube 40, and it is difficult to reduce the diameter. As a result, the gap between the packing tape 3 and the optical fiber bundle 2 increases, and the fiber unit 4 (the optical fiber bundle 2 and the packing tape 3) becomes thicker (refer to Figure 9A ). In the state where the gap between the packing tape 3 and the optical fiber bundle 2 is large, when the outer sheath 5 is covered, if the optical fiber unit 4 is fastened from the outside, there will be wrinkles 3B in the packing tape 3 (see Figure 9B ), the crimp 3B exerts pressure on the optical fiber 2B, which may adversely affect the transmission characteristics of the optical fiber 2B. ...
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
Login to View More Abstract
The present invention relates to a forming tool, a method of manufacturing an optical fiber unit, and a method of manufacturing an optical cable. The present invention wraps the optical fiber bundle with a pressing tape while guiding it. The forming tool of the present invention is characterized in that it includes: (A) a guide tube for guiding an optical fiber bundle composed of a plurality of optical fibers; The above-mentioned press-packed belt is formed from a belt shape into a spiral-shaped belt forming part, and the belt-shaped forming part has a bending part that gradually bends the belt-shaped above-mentioned press-packed belt while guiding the above-mentioned press-packed belt along the above-mentioned supply direction. and a spiral portion, the spiral portion is a spiral tubular portion on the downstream side than the position where the two edges of the above-mentioned curved portion intersect, and guides the above-mentioned press-packed belt along the above-mentioned supply direction, while passing the above-mentioned bending portion. Both ends of the press-packed belt are overlapped to make the above-mentioned press-packed belt spiral, and the outer diameter of the spiral-shaped above-mentioned press-packed belt is gradually reduced. The position where the two edges intersect is closer to the downstream side.
Description
technical field [0001] The present invention relates to a forming tool, a method of manufacturing an optical fiber unit, and a method of manufacturing an optical cable. Background technique [0002] There is known an optical cable in which a plurality of optical fibers are arranged inside a helically (cylindrical) press-wrapping tape. In Patent Document 1, the press-packed tape is formed into a helical shape by passing the press-packed tape into a forming tool provided with a helical slot having overlapping portions. [0003] In addition, Patent Documents 2 and 3 also disclose a forming tool (also referred to as a belt forming machine) for forming a press-wrapped belt. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2013-101175 [0005] Patent Document 2: Japanese Patent Application Laid-Open No. 11-271581 [0006] Patent Document 3: Japanese Patent Laid-Open No. 2004-12916 [0007] In Patent Document 1, after the packing tape is reformed into a spiral shape, i...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
CPCG02B6/448G02B6/4486G02B6/4431G02B6/443B29C53/72B29C53/58B29C63/10B29C53/581B29C63/08H01B13/26B29C63/024B29C63/105B29D11/00721B29K2995/0018B29L2011/0075
Inventor 梶智晃竹田大树盐原悟山中正义
Owner FUJIKURA LTD