Optical fiber terminal fixing tool for winding optical fiber and optical fiber winding method

Patent metadata

Field	Value
Publication number	US-9810870-B2
Application number	US-201414319532-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 2, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

An optical fiber terminal fixing tool includes: a disc-shaped substrate having a plate surface; a holding surface which is provided on the plate surface and interposes the terminal portion of the optical fiber between the holding surface and the first flange portion; and a protrusion which continues in a circumferential direction with a larger diameter than an outer diameter of the first flange portion in an outer circumferential portion on the plate surface while protruding toward the bobbin in a state where the fixing tool is mounted on the rotating shaft of the optical fiber winding machine.

First claim

What is claimed is:

1. An optical fiber terminal fixing tool for winding an optical fiber which is mounted on a rotating shaft of an optical fiber winding machine, and holds and fixes a terminal portion of a winding start side of the optical fiber to be wound between a first flange portion provided outside an optical fiber winding bobbin and the optical fiber terminal fixing tool, comprising:
a disc-shaped substrate having a plate surface;
a holding surface which is provided on the plate surface and interposes the terminal portion of the optical fiber between the holding surface and the first flange portion; and
a protrusion which continues in a circumferential direction with a larger diameter than an outer diameter of the first flange portion in an outer circumferential portion on the plate surface while protruding toward the bobbin in a state where the fixing tool is mounted on the rotating shaft of the optical fiber winding machine, wherein
a cross-sectional shape of the protrusion in a radial direction of the disc-shaed substrate has an approximately triangular shape.

2. The optical fiber terminal fixing tool for winding an optical fiber according to claim 1 , wherein
a protruded height of the protrusion from an extension surface of the holding surface is larger than a thickness of the first flange portion.

3. An optical fiber winding method, comprising:
preparing the optical fiber terminal fixing tool for winding an optical fiber according to claim 1 , the optical fiber winding bobbin in which a first winding portion is formed so as to be partitioned between the first flange portion and a second flange portion provided so as to be separated from the first flange portion, and the optical fiber;
interposing and fixing the terminal portion of the winding start side of the optical fiber between the holding surface and the first flange portion;
moving a portion of the optical fiber to the optical fiber winding bobbin by means of the protrusion;
crossing a portion of the optical fiber over the first flange portion by integrally rotating the optical fiber terminal fixing tool and the optical fiber winding bobbin; and
winding the optical fiber around the first winding portion.

4. The optical fiber winding method according to claim 3 , wherein
the optical fiber winding bobbin having an introduction groove cut into the inner side from the outer circumferential edge of the first flange portion is used as the optical fiber winding bobbin; and
the process of integrally rotating the optical fiber terminal fixing tool and the optical fiber winding bobbin includes engaging a portion of the optical fiber with the side edge of the introduction groove and passing the portion of the optical fiber through the inner portion of the introduction groove.

5. The optical fiber winding method according to claim 3 , wherein
dimensions of each portion of the optical fiber winding bobbin and the optical fiber terminal fixing tool are defined as follows for the bobbin and the optical fiber terminal fixing tool,
A: a width of the first winding portion of the optical fiber winding bobbin
B: a thickness of the first flange portion of the optical fiber winding bobbin
C 1 : a height of the first flange portion of the optical fiber winding bobbin
C 2 : a depth of an introduction groove of the first flange portion of the optical fiber winding bobbin
R: a radius of curvature of a chamfer portion when the side edge of the introduction groove is chamfered
D: a height from an extension surface of the holding surface to an apex of the protrusion in the optical fiber terminal fixing tool
E: a distance from an outer circumferential edge of the first flange portion to the apex of the protrusion in a radial direction of the optical fiber winding bobbin and the optical fiber terminal fixing tool
L: a distance between the first flange portion and the second flange portion in a direction parallel to the rotating shaft of the optical fiber winding bobbin
H: the height of the second flange portion from the outer circumferential surface of the second winding portion
wherein the optical fiber winding bobbin and the optical fiber terminal fixing tool, in which the dimensions of each portion satisfy the following Expression (1), Expression (2), and Expression (3), are prepared

C
2

B
-
R

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H
-

(

C
1

-

C
2

)

B
+
L

(
1
)

C
2

+
E

D

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C
2

B
-
R

(
2
)

D
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A
+

B
.

(
3
)

6. The optical fiber winding method according to claim 3 , further comprising:
preparing, as the optical fiber winding bobbin, a optical fiber winding bobbin which further includes a third flange portion, in which the first flange portion and the third flange portion are formed on both end sides of the optical fiber winding bobbin in a direction along a rotation axis, the second flange portion is formed between the first flange portion and the third flange portion, the first winding portion is formed between the first flange portion and the second flange portion, a second winding portion is formed between the second flange portion and the third flange portion, and a width in a direction along the rotation axis of the first winding portion is determined to be narrower than a widt

Assignees

• Fujikura Ltd

Inventors

• Akamatsu Tsuyoshi

Classifications

• G02B6/4457 Primary

  Bobbins; Reels · CPC title

• B65H65/00

  Securing material to cores or formers (arrangements for securing ends of material to cores, formers, supports or holders, e.g. reels, B65H75/28) · CPC title

• B65H2701/32

  Optical fibres or optical cables · CPC title