Screening apparatus for optical fiber and screening method for optical fiber

Patent metadata

Field	Value
Publication number	US-11143574-B2
Application number	US-201816129970-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Mar 18, 2016
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Provided is a screening apparatus or the like of an optical fiber that can suppress or prevent occurrence of a fiber-strike on the side of a feeding bobbin regardless of the weight of the feeding bobbin. An embodiment has a feeding bobbin 12 that feeds out an optical fiber 10; a screening unit 16 that applies a tension to the optical fiber 10 fed out from the feeding bobbin 12; a first capstan 14 that feeds the optical fiber 10 into the screening unit 16; a winding bobbin 20 that winds the optical fiber 10 to which the tension is applied by the screening unit 16; and a control unit 70 that, when disconnection of the optical fiber 10 occurs due to the tension applied by the screening unit 16, controls the feeding bobbin 12 and the first capstan 14 so as to stop rotation of the feeding bobbin 12 and rotation of the first capstan 14 and sets a deceleration rate of the first capstan 14 in accordance with a deceleration rate of the feeding bobbin 12.

First claim

The invention claimed is:

1. A screening apparatus for an optical fiber, the screening apparatus comprising:
a feeding bobbin that feeds out an optical fiber;
a tension application unit that applies a tension to the optical fiber fed out from the feeding bobbin;
a capstan that feeds the optical fiber fed out from the feeding bobbin into the tension application unit;
a winding bobbin that winds the optical fiber to which the tension is applied by the tension application unit; and
a control unit that, when disconnection of the optical fiber occurs due to the tension applied by the tension application unit, controls the feeding bobbin and the capstan so as to stop rotation of the feeding bobbin and rotation of the capstan and sets a deceleration rate of the capstan in accordance with a deceleration rate of the feeding bobbin.

2. The screening apparatus for the optical fiber according to claim 1 , wherein the control unit sets the deceleration rate of the capstan so that x and y satisfy following Equation (1):
4.1×10 −5 x+ 1.002< y< 8.3×10 −5 x+ 1.141  (1),

where the deceleration rate of the feeding bobbin is x, and a ratio of the deceleration rate of the capstan to the deceleration rate of the feeding bobbin is y.

3. The screening apparatus for the optical fiber according to claim 2 , wherein the control unit sets the deceleration rate of the capstan so that x and y satisfy following Equation (2):
0.9×(6.2×10 −5 x+ 1.072)≤ y≤ 1.1×(6.2×10 −5 x+ 1.072)  (2).

4. The screening apparatus for the optical fiber according to claim 1 , wherein the control unit calculates the deceleration rate of the feeding bobbin based on a rotation number of the feeding bobbin.

5. The screening apparatus for the optical fiber according to claim 1 , wherein the control unit calculates the deceleration rate of the feeding bobbin based on a weight of the feeding bobbin.

6. A screening method for an optical fiber, the screening method comprising steps of:
feeding out an optical fiber from a feeding bobbin;
feeding the optical fiber into a tension application unit by using a capstan;
applying a tension to the optical fiber by the tension application unit;
winding the optical fiber to which the tension is applied by the tension application unit by using a winding bobbin; and
when disconnection of the optical fiber occurs due to the tension applied by the tension application unit, stopping rotation of the feeding bobbin and rotation of the capstan and setting a deceleration rate of the capstan in accordance with a deceleration rate of the feeding bobbin.

7. The screening method for the optical fiber according to claim 6 , wherein the deceleration rate of the capstan is set so that x and y satisfy following Equation (1):
4.1×10 −5 x+ 1.002< y< 8.3×10 −5 x+ 1.141  (1),

where the deceleration rate of the feeding bobbin is x, and a ratio of the deceleration rate of the capstan to the deceleration rate of the feeding bobbin is y.

8. The screening method for the optical fiber according to claim 7 , wherein the deceleration rate of the capstan is set so that x and y satisfy following Equation (2):
0.9×(6.2×10 −5 x+ 1.072)≤ y≤ 1.1×(6.2×10 −5 x+ 1.072)  (2).

9. The screening method for the optical fiber according to claim 6 , wherein the deceleration rate of the feeding bobbin is calculated based on a rotation number of the feeding bobbin.

10. The screening method for the optical fiber according to claim 6 , wherein the deceleration rate of the feeding bobbin is calculated based on a weight of the feeding bobbin.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Suzuki Takashi

Classifications

• B65H63/00

  Warning or safety devices, e.g. automatic fault detectors, stop-motions (safety devices in general F16P; indicating devices in general G08B ){; Quality control of the package} · CPC title

• G01M11/00

  Testing of optical apparatus; Testing structures by optical methods not otherwise provided for · CPC title

• C03B37/12

  of fibres or filaments during winding up · CPC title

• G01N3/00

  Investigating strength properties of solid materials by application of mechanical stress · CPC title

• G01M11/088 Primary

  of optical fibres; Mechanical features associated with the optical testing of optical fibres · CPC title