US20130309406A1 - Coat removing method of coated optical fiber and coat removing apparatus of coated optical fiber - Google Patents

Coat removing method of coated optical fiber and coat removing apparatus of coated optical fiber Download PDF

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Publication number
US20130309406A1
US20130309406A1 US13/947,686 US201313947686A US2013309406A1 US 20130309406 A1 US20130309406 A1 US 20130309406A1 US 201313947686 A US201313947686 A US 201313947686A US 2013309406 A1 US2013309406 A1 US 2013309406A1
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United States
Prior art keywords
optical fiber
coated optical
coat
length direction
removal blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/947,686
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English (en)
Inventor
Kouichi Yokota
Manabu Tabata
Yoshiharu Kanda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
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Fujikura Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujikura Ltd filed Critical Fujikura Ltd
Assigned to FUJIKURA LTD. reassignment FUJIKURA LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANDA, YOSHIHARU, TABATA, MANABU, YOKOTA, KOUICHI
Publication of US20130309406A1 publication Critical patent/US20130309406A1/en
Priority to US15/434,209 priority Critical patent/US10107963B2/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/245—Removing protective coverings of light guides before coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
    • H02G1/1248—Machines
    • H02G1/1251—Machines the cutting element not rotating about the wire or cable
    • H02G1/1253—Machines the cutting element not rotating about the wire or cable making a transverse cut
    • H02G1/1256—Machines the cutting element not rotating about the wire or cable making a transverse cut using wire or cable-clamping means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
    • H02G1/1248—Machines
    • H02G1/1251—Machines the cutting element not rotating about the wire or cable
    • H02G1/126—Machines the cutting element not rotating about the wire or cable making a longitudinal cut

Definitions

  • the present invention relates to a coat removing method of a coated optical fiber and a coat removing apparatus of a coated optical fiber.
  • a coated optical fiber i.e., an optical fiber covered with a coat must be subjected to a removal of the coat at an intermediate section of the coated optical fiber.
  • a blade-using mechanical technique such as one described in Japanese Unexamined Patent Application Publication No. 2010-164697.
  • the coat removing method mentioned above is carried out in a state that the coated optical fiber is held with a pair of clamps and is placed on a flat base.
  • a removal blade for removing the coat is tilted at an acute angle with respect to the coated optical fiber and is moved toward the coated optical fiber until it comes in contact with the coated optical fiber.
  • the removal blade is moved in a length direction of the coated optical fiber, to bite the coat of the coated optical fiber. This is carried out until an edge of the removal blade comes in contact with an outer circumferential face of the optical fiber in the coat.
  • the removal blade is moved away from the optical fiber within a thickness range of the coat. With the edge being at the front in a moving direction, the removal blade is moved in the length direction of the coated optical fiber, thereby removing the coat.
  • the blade-using coat removing method employs the flat base to place the coated optical fiber thereon, or a table to receive the coated optical fiber. This causes the edge of the removal blade, when moved along the coated optical fiber, to strongly hit the optical fiber in the coat due to vibration of the removal blade or a parallelism error between the table and the moving direction of the removal blade. This will deteriorate the strength of the optical fiber.
  • the edge bites the coat the optical fiber is held between the edge and the table, and therefore, the movement of the removal blade must highly precisely be controlled with the use of, for example, a touch sensor.
  • the coat is made of polyimide resin such as the case of a submarine optical fiber cable, the coat is very thin, for example, 15 ⁇ m and is hard, and therefore, controlling the biting amount of the edge is very difficult.
  • an object of the present invention is to remove a coat without causing an edge to strongly hit an optical fiber in the coat or without highly precisely controlling a biting amount of the edge into the coat.
  • a coat removing method of removing a coat of a coated optical fiber having an optical fiber covered by a coat includes holding the coated optical fiber with a pair of holders at two locations spaced by a predetermined distance in a length direction of the coated optical fiber, applying a predetermined tension to the coated optical fiber in the length direction, pressing a coat removal blade to the coated optical fiber in the tension-applied state in a direction crossing the length direction to bend the coated optical fiber, and moving the coat removal blade in the length direction along the coated optical fiber in the bent state, thereby removing the coat.
  • the tension applied to the coated optical fiber in the length direction and the bending amount of the coated optical fiber i.e., the moving amount of the coat removal blade in the pressing direction with respect to the coated optical fiber may be adjusted to adjust load applied by the coat removal blade to press the coated optical fiber.
  • a coat removing apparatus for removing a coat of a coated optical fiber having an optical fiber covered by a coat with the use of a coat removal blade.
  • the apparatus includes a pair of holders that hold the coated optical fiber at two locations spaced by a predetermined distance in a length direction of the coated optical fiber, a tension applying unit that applies tension in the length direction to the coated optical fiber held with the holders, a first moving mechanism that moves the coat removal blade in a direction crossing the length direction to press and bend the coated optical fiber tensioned by the tension applying unit, and a second moving mechanism that moves the coat removal blade in the length direction along the coated optical fiber bent by the first moving mechanism, thereby removing the coat.
  • One of the pair of holders may be fixed and the other may be movable in the length direction of the coated optical fiber.
  • the tension applying unit may have a resilient element that pushes the movable holder in a direction away from the fixed holder.
  • FIG. 1 is a front view of a coat removing apparatus according to an embodiment of the present invention.
  • FIG. 2 is a plan view of the coat removing apparatus of FIG. 1 .
  • FIG. 3 is a sectional view of a coated optical fiber.
  • FIG. 4 is an operation explanatory view illustrating a state of removing a coat of the coated optical fiber with the coat removing apparatus of FIG. 1 .
  • FIG. 5 is a view illustrating a correlation between blade force applied by a coat removal blade to the coated optical fiber in the coat removing apparatus of FIG. 1 and tensile strength of a glass fiber.
  • fiber clamps 5 and 7 spaced by a predetermined distance are arranged on the left and right sides of a base plate 1 , to serve as the holders to hold a coated optical fiber 3 at two locations distanced away from each other in a length direction.
  • the fiber clamp 5 on the right side of FIG. 1 has a base 9 fixed to the base plate 1 .
  • the fiber clamp 7 on the left side of FIG. 1 has a base 11 that is slidable relative to the base plate 1 through a slide bearing 13 in the length direction (a left-right direction in FIG. 1 ) of the coated optical fiber 3 .
  • the slidable base 11 has a lower base provided with a tension mechanism 15 serving as the tension applying unit.
  • the tension mechanism 15 includes a spring receiver 17 that is spaced from the base 11 and is fixed to the base plate 1 and a spring 19 that is interposed between the spring receiver 17 and the base 11 and serves as the resilient element to push the whole of the fiber clamp 7 in a direction (a leftward direction in FIG. 1 ) away from the fiber clamp 5 .
  • the spring 19 biases the base 11 , to apply tension in the length direction (the left-right direction in FIG. 1 ) to the coated optical fiber 3 held by the pair of fiber clamps 5 and 7 .
  • Opposing upper parts of the bases 9 and 11 of the fiber clamps 5 and 7 are provided with fiber holders 21 and 23 to hold the coated optical fiber 3 .
  • the fiber holders 21 and 23 have seats 21 a and 23 a on each of which a recess is formed to receive the coated optical fiber 3 and clamp lids 21 b and 23 b that are opened and closed to press and fix the coated optical fiber 3 received in the recesses.
  • the fiber holders 21 and 23 are fixed to rotary supports 25 and 27 that protrude from the bases 9 and 11 toward the opposing sides.
  • the rotary supports 25 and 27 are rotatable relative to the bases 9 and 11 through bearings (not illustrated) around an axial line (a horizontal axial line in the left-right direction of FIG. 1 ) of the coated optical fiber 3 .
  • the coated optical fiber 3 held with the fiber holders 21 and 23 turns around the axial line.
  • the bases 9 and 11 of the fiber clamps 5 and 7 incorporate rotary bodies (not illustrated) that turn according to rotation of the rotary supports 25 and 27 .
  • the rotary bodies are turned by a motor (not illustrated) installed in any one of the bases 9 and 11 through a power transmission mechanism such as gear reduction.
  • the rotary body in one of the bases 9 and 11 in which no motor is installed is connected to the other so that it may turn in synchronization with the rotary body driven and turned by the motor.
  • driving the motor results in synchronously turning the rotary supports 25 and 27 around the center axial line of the coated optical fiber 3 , to turn the coated optical fiber 3 around the center axial line.
  • the motor and power transmission mechanism such as gear reduction (not illustrated) and the rotary supports 25 and 27 form the third moving mechanism that is a rotary driving mechanism to turn the coated optical fiber 3 around the axial line thereof.
  • a coat removal blade 29 that is detachably attached to a front end part of a removal blade holder 31 .
  • the coat removal blade 29 has a wedge shape with an edge having a sharp sectional shape.
  • the coat removal blade 29 is wide and elongated in a horizontal direction (a top-bottom direction of FIG. 2 ) orthogonal to the axial line of the coated optical fiber 3 .
  • the coat removal blade 29 is tilted to form an acute angle with respect to the coated optical fiber 3 that is horizontally arranged.
  • a base end of the removal blade holder 31 is attached through a guide rail (not illustrated) to an X-direction movable body 33 , which moves in an X-direction in FIG. 2 , so that the removal blade holder 31 is movable in a Z-direction in FIG. 1 .
  • the Z-direction movement of the removal blade holder 31 is achieved with the use of a ball screw 37 by a Z-direction motor 35 arranged on the X-direction movable body 33 .
  • the Z-direction motor 35 is driven to turn a threaded shaft 39 that is screwed in the Z-direction into a nut (female thread) of the removal blade holder 31 , so that the removal blade holder 31 together with the coat removal blade 29 may move in the Z-direction with respect to the X-direction movable body 33 .
  • Moving the removal blade holder 31 in the Z-direction results in moving the coat removal blade 29 in a vertical direction in FIG. 1 toward and away from the coated optical fiber 3 .
  • the Z-direction motor 35 , ball screw 37 , and the like form the first moving mechanism that moves the coat removal blade 29 in a direction intersecting the length direction, to press and bend the coated optical fiber 3 .
  • the X-direction movable body 33 is attached to a Y-direction movable body 41 movable in the Y-direction in FIG. 2 and is movable in the X-direction.
  • Moving the X-direction movable body 33 is achieved by use of a ball screw 43 .
  • a threaded shaft 45 extending in the X-direction is screwed into a nut (female thread) of the X-direction movable body 33 and is connected to an X-direction motor 47 arranged on the X-direction movable body 33 .
  • the threaded shaft 45 turns and the X-direction movable body 33 moves on a guide rail (not illustrated) in the X-direction.
  • the Y-direction movable body 41 moves in the Y-direction in FIG. 2 with the use of a ball screw 49 .
  • a threaded shaft 51 extending in the Y-direction is screwed into a nut (female thread) of the Y-direction movable body 41 and is connected to a Y-direction motor 53 arranged on the base plate 1 .
  • the threaded shaft 51 turns and the Y-direction movable body 41 moves on a guide rail (not illustrated) in the Y-direction.
  • the Y-direction motor 53 , ball screw 49 , and the like form the second moving mechanism that moves the coat removal blade 29 in the length direction of the coated optical fiber 3 with respect to the coated optical fiber 3 bent by the above-mentioned first moving mechanism.
  • the Z-direction motor 35 , X-direction motor 47 , Y-direction motor 53 , and the motor (not illustrated) arranged on any one of the bases 9 and 11 are controlled and driven by a control unit 55 as illustrated in FIG. 2 .
  • the X-direction movable body 33 and Y-direction movable body 41 , the driving mechanisms to drive them, and the driving mechanism to drive the removal blade holder 31 are not illustrated.
  • the coated optical fiber 3 includes a glass fiber 3 a such as a quartz-based optical fiber and the coat made of, for example, polyimide resin 3 b coated around the glass fiber 3 a .
  • the glass fiber 3 a has a diameter of 125 ⁇ m (micrometers) and the polyimide resin 3 b has an outer diameter (the diameter of the coated optical fiber 3 ) of 155 ⁇ m.
  • the coated optical fiber 3 is held with the pair of fiber holders 21 and 23 .
  • the spring 19 biases the base 11 to apply tension to the coated optical fiber 3 in the length direction.
  • the tension applied is, for example, 0.49 N (newton) and a clamp-to-clamp distance W under the tension is 58 mm.
  • the coat removal blade 29 is set, by properly driving the Z-direction motor 35 , X-direction motor 47 , and Y-direction motor 53 , to an initial state above the coated optical fiber 3 .
  • the Z-direction motor 35 is driven to descend the coat removal blade 29 so that the edge is pressed to the coated optical fiber 3 .
  • a descending amount H of the coat removal blade 29 (corresponding to a bending amount of the coated optical fiber 3 ) from the initial position is 350 ⁇ m.
  • the coated optical fiber 3 downwardly bends, and in the bent state, the Y-direction motor 53 is driven to move the coat removal blade 29 in the edge direction, i.e., the left direction in FIG. 1 .
  • the coat of the polyimide resin 3 b is gradually removed.
  • a coat removing range is, for example, about 35 mm in the length direction of the coated optical fiber 3 .
  • the coat removal blade is ascended by driving the Z-direction motor 35 .
  • the Y-direction motor 53 is driven to return the coat removal blade 29 to the initial position.
  • the rotary supports 25 and 27 are turned by a predetermined angle such as about 90 degrees, so that a part of the coated optical fiber 3 that circumferentially corresponds to the coat-removed part and is still covered with the coat may face the coat removal blade 29 that is present above the part. In this state, the above-mentioned operation is carried out to remove the coat from the part.
  • the operation mentioned above is repeated to remove the coat from the whole circumference of the coated optical fiber 3 having a range of 35 mm in length.
  • the angle of turning the coated optical fiber 3 is properly determined according to the diameter of the coated optical fiber 3 .
  • the coated optical fiber 3 having a large diameter employs a smaller rotation angle than the coated optical fiber 3 having a small diameter, to increase the number of the coat removing operations carried out by moving the coat removal blade 29 in the Y-direction.
  • the coat removal blade 29 is wide in the X-direction as illustrated in FIG. 2 . After one or a plurality of the coat removing operations in the Y-direction, the coat removal blade 29 at the initial position is slightly moved in the X-direction by driving the X-direction motor 47 , so that the next coat removal operation is started with a new edge.
  • the embodiment sets the tension applied to the coated optical fiber 3 to 0.49 N, the clamp-to-clamp distance W to 58 mm, and the pressing amount (descending amount) of the coat removal blade 29 to 350 ⁇ m.
  • load (blade force) applied by the edge of the coat removal blade 29 to the coated optical fiber 3 becomes about 11.76 ⁇ 10 ⁇ 3 N.
  • FIG. 5 illustrates tensile strength of the coat-removed glass fiber 3 a with respect to the above-mentioned load (blade force).
  • Data represented with a vertical segment contains a plurality of data pieces for the corresponding specific blade force and data represented with a mark x is an average of the data pieces.
  • a blade force of 9.8 ⁇ 10 ⁇ 3 N involves a plurality of data pieces in a tensile strength range of about 35 to 60 N whose average is about 50 N.
  • the tensile strength of the glass fiber 3 a is sufficient if it is 30.0 N or over.
  • the tensile strength of 30.0 N or over requires the blade force to be at least in a range of about 6.86 ⁇ 10 ⁇ 3 N to about 11.76 ⁇ 10 ⁇ 3 N.
  • the embodiment sets the load (blade force) of the edge acting on the coated optical fiber 3 to about 11.76 ⁇ 10 ⁇ 3 N, to secure the tensile strength of the glass fiber 3 a after the removal of the coat.
  • the embodiment presses the coat removal blade 29 to the coated optical fiber 3 that is in a tensile applied state, to bend the coated optical fiber 3 .
  • the embodiment moves the coat removal blade 29 in the length direction of the coated optical fiber 3 , to remove the coat.
  • the embodiment has no need of precisely controlling the biting amount of the edge into the coat because the embodiment adjusts tension applied to the coated optical fiber 3 and the pushing amount (descending amount H) of the coat removal blade 29 , to adjust blade force applied to the coated optical fiber 3 within a predetermined range. Accordingly, the embodiment is capable of removing the coat without causing the edge to strongly hit the glass fiber 3 a in the polyimide resin 3 b .
  • the embodiment is simple in configuration and low in cost and is capable of preventing the strength of the glass fiber 3 a from lowering after the removal of the coat.
  • the embodiment adjusts the tension applied in the length direction to the coated optical fiber 3 and the bending amount of the coated optical fiber 3 , i.e., the moving amount H in the pressing direction of the coat removal blade 29 with respect to the coated optical fiber 3 , to adjust the pressing load (blade force) applied by the coat removal blade 29 to the coated optical fiber 3 .
  • the embodiment is capable of preventing the edge from strongly hitting the glass fiber 3 a in the polyimide resin 3 b.
  • one of the pair of fiber clamps 5 and 7 is fixed and the other is moved in the length direction of the coated optical fiber 3 .
  • the tension mechanism 15 has the spring 19 to bias the movable fiber clamp 7 away from the fixed fiber clamp 5 .
  • the pushing configuration with the spring 19 is simple and low-cost to apply tension to the coated optical fiber 3 .
  • the embodiment employs the rotary driving mechanism including the rotary supports 25 and 27 to turn the coated optical fiber 3 around the axial line thereof.
  • the coat removal blade 29 is moved in the Y-direction to remove the coat from a circumferential partial area at a given location along the coated optical fiber 3 .
  • the coated optical fiber 3 is turned and the coat removal blade 29 is again moved in the Y-direction to sequentially remove the coat from another circumferential partial area at the given location. Consequently, the coat is removed from the whole circumference at the given location of the coated optical fiber 3 .
  • the present invention is applicable to coat removing methods and coat removing apparatuses that remove a coat from a coated optical fiber.
  • the coat removal blade is pressed to the coated optical fiber that is being tensioned, to bend the coated optical fiber. In this state, the coat removal blade is moved in the length direction of the coated optical fiber. Accordingly, without highly precisely controlling the biting amount of an edge of the coat removal blade into the coat or without causing the edge to strongly hit the optical fiber in the coat, the present invention is capable of removing the coat.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
US13/947,686 2011-01-24 2013-07-22 Coat removing method of coated optical fiber and coat removing apparatus of coated optical fiber Abandoned US20130309406A1 (en)

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US15/434,209 US10107963B2 (en) 2011-01-24 2017-02-16 Coat removing method of coated optical fiber

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PCT/JP2011/051244 WO2012101745A1 (ja) 2011-01-24 2011-01-24 被覆光ファイバの被覆除去方法及び被覆光ファイバの被覆除去装置

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US13/947,686 Abandoned US20130309406A1 (en) 2011-01-24 2013-07-22 Coat removing method of coated optical fiber and coat removing apparatus of coated optical fiber
US15/434,209 Active US10107963B2 (en) 2011-01-24 2017-02-16 Coat removing method of coated optical fiber

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US (2) US20130309406A1 (de)
EP (1) EP2669720B1 (de)
JP (1) JP5433797B2 (de)
CN (1) CN103329015B (de)
WO (1) WO2012101745A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190165555A1 (en) * 2017-11-29 2019-05-30 Honda Motor Co., Ltd. Removing apparatus and method
US20210376582A1 (en) * 2020-05-28 2021-12-02 State Grid Huzhou Power Supply Company Method for processing a reaction force cone of a cable main insulating layer
CN115290542A (zh) * 2022-07-12 2022-11-04 胡沙沙 一种绝缘涂层性能的测试系统

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CN102798932A (zh) * 2012-08-03 2012-11-28 无锡爱沃富光电科技有限公司 光纤剥线装置
JP5850992B1 (ja) * 2014-07-30 2016-02-03 株式会社フジクラ 光デバイス、及び、光デバイスの製造方法
CN105445855B (zh) * 2016-01-27 2017-03-22 深圳市创鑫激光股份有限公司 一种剥除光纤的涂覆层的方法及装置
CN106291817A (zh) * 2016-09-22 2017-01-04 武汉锐科光纤激光技术股份有限公司 一种自动剥除光纤涂覆层的设备
JP6190029B1 (ja) * 2016-11-02 2017-08-30 株式会社フジクラ 光ファイバ切断システム
CN108023310A (zh) * 2018-01-29 2018-05-11 山东博发智能科技有限公司 一种压紧式电缆快速剥皮装置

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US5481638A (en) * 1994-07-05 1996-01-02 At&T Corp. Techniques for stripping optical fiber encapsulants
US6273990B1 (en) * 1998-06-30 2001-08-14 Corning Incorporated Method and apparatus for removing a protective coating from an optical fiber and inhibiting damage to same
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US6418252B1 (en) * 2001-01-16 2002-07-09 The Regents Of The University Of California Light diffusing fiber optic chamber
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Publication number Priority date Publication date Assignee Title
US20190165555A1 (en) * 2017-11-29 2019-05-30 Honda Motor Co., Ltd. Removing apparatus and method
US10790649B2 (en) * 2017-11-29 2020-09-29 Honda Motor Co., Ltd. Removing apparatus and method
US20210376582A1 (en) * 2020-05-28 2021-12-02 State Grid Huzhou Power Supply Company Method for processing a reaction force cone of a cable main insulating layer
US11677218B2 (en) * 2020-05-28 2023-06-13 State Grid Huzhou Power Supply Company Method for processing a reaction force cone of a cable main insulating layer
CN115290542A (zh) * 2022-07-12 2022-11-04 胡沙沙 一种绝缘涂层性能的测试系统

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JPWO2012101745A1 (ja) 2014-06-30
US10107963B2 (en) 2018-10-23
CN103329015B (zh) 2016-10-26
JP5433797B2 (ja) 2014-03-05
EP2669720B1 (de) 2020-03-04
US20170160475A1 (en) 2017-06-08
EP2669720A1 (de) 2013-12-04
CN103329015A (zh) 2013-09-25
EP2669720A4 (de) 2014-11-26
WO2012101745A1 (ja) 2012-08-02

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