EP2016452A1 - Splice holder for optical fibres - Google Patents

Splice holder for optical fibres

Info

Publication number
EP2016452A1
EP2016452A1 EP07748093A EP07748093A EP2016452A1 EP 2016452 A1 EP2016452 A1 EP 2016452A1 EP 07748093 A EP07748093 A EP 07748093A EP 07748093 A EP07748093 A EP 07748093A EP 2016452 A1 EP2016452 A1 EP 2016452A1
Authority
EP
European Patent Office
Prior art keywords
wall
splice
splice holder
side sections
channel
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.)
Withdrawn
Application number
EP07748093A
Other languages
German (de)
French (fr)
Other versions
EP2016452A4 (en
Inventor
Lars Hedström
Kjell NYSTRÖM
Robert Lindberg
Stefan Grankvist
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.)
MT Skelleftea Memoteknik AB
Original Assignee
MT Skelleftea Memoteknik AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38667990&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2016452(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MT Skelleftea Memoteknik AB filed Critical MT Skelleftea Memoteknik AB
Publication of EP2016452A1 publication Critical patent/EP2016452A1/en
Publication of EP2016452A4 publication Critical patent/EP2016452A4/en
Withdrawn legal-status Critical Current

Links

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
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4453—Cassettes
    • G02B6/4454—Cassettes with splices
    • 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
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/44785—Cable clamps

Definitions

  • the present invention concerns a splice holder intended to receive and support in a manner that retains in a fixed manner splices of optical fibres in a fibre-optical network.
  • a fibre cable normally comprises a bundle of several individual fibre-optical conductors, known as optical fibres.
  • Each optical fibre comprises a doped glass core with a number of layers or shells that surround it. The said layers have the function of not only protecting the core, but also causing the light signal to be reflected internally in the optical fibre.
  • Each individual optical fibre also has an outer layer or cover of plastic material that serves as protection and that makes it possible to colour-code the optical fibre. This plastic cover must be peeled back or stripped off when the optical fibre is to be spliced.
  • a procedure known as "break-out” is carried out in special coupling stations in the form of cabinets or frames. This procedure is the division of incoming trunk fibre cables into the distribution network such that data traffic can be directed to each individual subscriber or workplace.
  • the individual fibre-optical conductors have spliced onto them a contact in the coupling station, in order to facilitate the movement or reconnection between different pieces of equipment or subscribers.
  • the said splicing is normally carried out through the protective layer of the optical fibre being stripped off and the two ends of the fibres being welded together.
  • the optical fibres are thin and sensitive, and this means that the locations of splices or points of connection between two fibre ends that have been connected in this manner must be carefully surrounded by protective splice sleeves that are similar to heat-shrink tubing, the thicknesses of which are to be considerably greater than that of the optical fibre.
  • the splice sleeves after application not only extend over the stripped optical fibres: they also surround a part of the existing, non-stripped, plastic cover of the optical fibre.
  • the splice sleeves thus function to reduce the tensile load on the optical fibre.
  • the splice sleeves are placed into specially designed holders, known as "splice holders", arranged on distribution trays arranged in the cabinet or frame mentioned above.
  • the optical fibres are placed with a certain excess or slack in loops onto the distribution trays such that simple repairs to splices and similar can be carried out without needing to exchange the complete fibre cable.
  • the constructive designs of splice holders differ. It is normal that the splice sleeve has the form of a simple fibre splice, or of a ribbon of fibre splices.
  • the splice sleeves may in certain cases have the form of a block, known as a "fan out" block.
  • the splice holders be flexibly designed to such a degree that they can receive and support in an organised and secure manner the types of splice sleeve that are established without risk of damage to the optical fibres that have been joined in the splice sleeve.
  • One aim of the present invention is thus to achieve a splice holder with large flexibility that allows established types of splice sleeve to be mounted in the holder in a manner that retains them.
  • Figure 1 shows a perspective view obliquely from above of the splice holder according to the invention
  • Figure 2 shows a perspective view of the splice holder obliquely from below
  • Figure 3 shows a view equivalent to that in Figure 1 with a thinner first type of splice sleeve mounted in the splice holder
  • Figure 4 shows a view corresponding to that in Figure 1 , but in this case with a thicker second type of splice sleeve mounted in the splice holder.
  • the splice holder for optical fibres shown in the figures and generally denoted by 1 has been manufactured in one piece of flexible material formed by injection moulding.
  • the material that can be formed by injection moulding is constituted by a plastic material, preferably a thermoplastic such as polypropylene (PP) or polyvinyl chloride (PVC).
  • the splice holder 1 has a flat bottom 2 perpendicularly from one plane side of which a series of walls extend, generally denoted by reference numbers 3, 3' and parallel to each other.
  • the said walls 3, 3' have the form of lamellae arranged in a row after each other in the longitudinal direction of the base 2 and they are located at such a distance from each other that channels, generally denoted by reference number 4, are limited by neighbouring walls in the row.
  • the channels 4 have been given such a width that one or several spliced optical fibres, which as a consequence of the splicing are provided with splice sleeves 5, can be mounted in a very flexible manner and in a manner that allows fixing in the channels between the walls 3, 3'.
  • FIG. 1 when viewed in a plan view or from above the walls 3, 3 1 are bent in planes that cut the base 2 perpendicularly.
  • Each wall 3, 3' demonstrates a principally convex front 6 and a concave back 7.
  • the wall 3, 3' that is in this way bent consists of a centrally plane section of wall 8 extending from the base and side sections of wall 9 that extend from the said central section in opposite directions.
  • the wall 3, 3' has been given the said bent shape in the direction of the splice sleeve 5 that is mounted in the channel 4 in order to offer the flexibility when receiving splice sleeves of different sizes that the invention strives to offer.
  • the side sections of wall 9 extend in a freely supporting manner out from the central section of wall 8 and thus each one is elastically flexible relative to the central plane section of wall 8 along a single line.
  • This line is denoted by reference number 10 in Figure 2.
  • the central plane section of wall 8 is thin- walled and it is arranged extending across the longitudinal direction of the base 2.
  • the side sections of wall 9 are relatively easy to flex in a sideways direction along the lines 10 relative to the central section of wall 8, thus they are flexible around lines that are perpendicular to the principal plane of the base 2.
  • the side sections of wall 9 can be regarded as plane, but they have been given an angled or wedge-shaped design that will be described in more detail below.
  • the two side sections of wall 9, that form a front wall 3 together with the central plane section of wall 8, are angled backwards at equal angles to the neighbouring rear second wall 3 1 .
  • the side sections of wall 9 are angled backwards at an angle X relative to a plane parallel to the central section of wall 8. It is appropriate that this angle lies in the interval 10-20°, preferably 15°.
  • Figures 3 and 4 show a number of splice sleeves 5 mounted into the holder 1 according to the invention.
  • the splice sleeves 5 in Figure 3 are of a first thinner design, while those in Figure 4 are of a somewhat broader second design 5'.
  • the free edges 11 of the side sections of wall 9 are denoted by the reference number 11 in the drawings.
  • the side wall sections 9 of one front wall 3 can be said to demonstrate double-angled surfaces to the rear second wall 3 1 .
  • the splice sleeve 5 mounted in the channel 4 is forced down towards the bottom of the channel through the influence of the two wedge-shaped planes 12 of the side sections of wall 9, which planes are angled backwards and downwards.
  • the retaining force for the splice sleeve 5 that has been mounted in the channels 4 will be a spring force and it will increase in tensile direction for the splice sleeve out from the channel.
  • the present splice holder 1 is intended to be mounted onto a distribution tray.
  • a distribution tray is shown for simplicity's sake only as a fragmentary part in the drawings and it is denoted by the reference number 13.
  • the splice holder 1 is provided with snap-on fastening means 14 in order to facilitate its mounting.
  • the snap-on fastening means 14 are designed with hooks 15 having sharp edges that extend perpendicularly from the plane second side of the plate- shaped base 2. It is intended that the hooks 15 will interact for locking with holes 16 punched into the distribution tray whereby the hooks are caused through downwards driving to enter into locking interaction with the said holes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The invention concerns a splice holder (1 ) for optical fibres, comprising a plate- formed base (2) from one side of which a series of parallel walls (3, 3') extend that are arranged in a row after each other and situated at such a distance from each other that channels (4) for the reception of a splice sleeve (5) of a spliced optical fibre are limited between neighbouring walls in the row. In a splice holder that allows in a flexible manner established types of splice sleeves to be fixed in a manner that retains them, at least one wall (3) of such a defined channel (4) comprises a central wall section (8) extending from the base (2) and side sections of wall (9) extended in opposite directions from the central section of wall, which side sections are so designed that the splice sleeve (5) that is mounted in the channel is retained through a spring interaction between the free edges (11 ) of the two side walls and the second wall (31) that limits the channel.

Description

SPLICE HOLDER FOR OPTICAL FIBRES
The present invention concerns a splice holder intended to receive and support in a manner that retains in a fixed manner splices of optical fibres in a fibre-optical network.
A fibre cable normally comprises a bundle of several individual fibre-optical conductors, known as optical fibres. Each optical fibre comprises a doped glass core with a number of layers or shells that surround it. The said layers have the function of not only protecting the core, but also causing the light signal to be reflected internally in the optical fibre. Each individual optical fibre also has an outer layer or cover of plastic material that serves as protection and that makes it possible to colour-code the optical fibre. This plastic cover must be peeled back or stripped off when the optical fibre is to be spliced.
A procedure known as "break-out" is carried out in special coupling stations in the form of cabinets or frames. This procedure is the division of incoming trunk fibre cables into the distribution network such that data traffic can be directed to each individual subscriber or workplace. The individual fibre-optical conductors have spliced onto them a contact in the coupling station, in order to facilitate the movement or reconnection between different pieces of equipment or subscribers. The said splicing is normally carried out through the protective layer of the optical fibre being stripped off and the two ends of the fibres being welded together.
The optical fibres are thin and sensitive, and this means that the locations of splices or points of connection between two fibre ends that have been connected in this manner must be carefully surrounded by protective splice sleeves that are similar to heat-shrink tubing, the thicknesses of which are to be considerably greater than that of the optical fibre. The splice sleeves after application not only extend over the stripped optical fibres: they also surround a part of the existing, non-stripped, plastic cover of the optical fibre. The splice sleeves thus function to reduce the tensile load on the optical fibre. The splice sleeves are placed into specially designed holders, known as "splice holders", arranged on distribution trays arranged in the cabinet or frame mentioned above. The optical fibres are placed with a certain excess or slack in loops onto the distribution trays such that simple repairs to splices and similar can be carried out without needing to exchange the complete fibre cable. The constructive designs of splice holders differ. It is normal that the splice sleeve has the form of a simple fibre splice, or of a ribbon of fibre splices. The splice sleeves may in certain cases have the form of a block, known as a "fan out" block.
Since the splice sleeve can demonstrate a number of different designs and thus also a number of different dimensions, it is necessary that the splice holders be flexibly designed to such a degree that they can receive and support in an organised and secure manner the types of splice sleeve that are established without risk of damage to the optical fibres that have been joined in the splice sleeve. One aim of the present invention is thus to achieve a splice holder with large flexibility that allows established types of splice sleeve to be mounted in the holder in a manner that retains them.
This aim of the invention is achieved through a splice holder demonstrating the properties and characteristics that are specified in claim 1.
Other properties and advantages of the invention are made clear by subsequent claims and the description below of an embodiment, with reference to the attached drawings, in which Figure 1 shows a perspective view obliquely from above of the splice holder according to the invention, Figure 2 shows a perspective view of the splice holder obliquely from below, Figure 3 shows a view equivalent to that in Figure 1 with a thinner first type of splice sleeve mounted in the splice holder, Figure 4 shows a view corresponding to that in Figure 1 , but in this case with a thicker second type of splice sleeve mounted in the splice holder.
The splice holder for optical fibres shown in the figures and generally denoted by 1 has been manufactured in one piece of flexible material formed by injection moulding. The material that can be formed by injection moulding is constituted by a plastic material, preferably a thermoplastic such as polypropylene (PP) or polyvinyl chloride (PVC).
The splice holder 1 has a flat bottom 2 perpendicularly from one plane side of which a series of walls extend, generally denoted by reference numbers 3, 3' and parallel to each other. The said walls 3, 3' have the form of lamellae arranged in a row after each other in the longitudinal direction of the base 2 and they are located at such a distance from each other that channels, generally denoted by reference number 4, are limited by neighbouring walls in the row. The channels 4 have been given such a width that one or several spliced optical fibres, which as a consequence of the splicing are provided with splice sleeves 5, can be mounted in a very flexible manner and in a manner that allows fixing in the channels between the walls 3, 3'.
As is made clear by Figure 1 , when viewed in a plan view or from above the walls 3, 31 are bent in planes that cut the base 2 perpendicularly. Each wall 3, 3' demonstrates a principally convex front 6 and a concave back 7. The wall 3, 3' that is in this way bent consists of a centrally plane section of wall 8 extending from the base and side sections of wall 9 that extend from the said central section in opposite directions. The wall 3, 3' has been given the said bent shape in the direction of the splice sleeve 5 that is mounted in the channel 4 in order to offer the flexibility when receiving splice sleeves of different sizes that the invention strives to offer. As is made most clear by Figures 1 and 2, the side sections of wall 9 extend in a freely supporting manner out from the central section of wall 8 and thus each one is elastically flexible relative to the central plane section of wall 8 along a single line. This line is denoted by reference number 10 in Figure 2. The central plane section of wall 8 is thin- walled and it is arranged extending across the longitudinal direction of the base 2. The side sections of wall 9 are relatively easy to flex in a sideways direction along the lines 10 relative to the central section of wall 8, thus they are flexible around lines that are perpendicular to the principal plane of the base 2. The side sections of wall 9 can be regarded as plane, but they have been given an angled or wedge-shaped design that will be described in more detail below.
The two side sections of wall 9, that form a front wall 3 together with the central plane section of wall 8, are angled backwards at equal angles to the neighbouring rear second wall 31. The side sections of wall 9 are angled backwards at an angle X relative to a plane parallel to the central section of wall 8. It is appropriate that this angle lies in the interval 10-20°, preferably 15°.
Figures 3 and 4 show a number of splice sleeves 5 mounted into the holder 1 according to the invention. The splice sleeves 5 in Figure 3 are of a first thinner design, while those in Figure 4 are of a somewhat broader second design 5'. The free edges 11 of the side sections of wall 9 are denoted by the reference number 11 in the drawings.
A closer study of the said drawings will reveal that the splice sleeves 5, 51 are mounted in the channels 4 in a retaining manner through a sprung interaction between free edges 11 of one front wall and the central wall section 8 of the limiting rear wall 3'. Closer study of Figures 2 and 3 will reveal that the side sections of wall 9 have an oblique plane 12 and they become narrower, starting at an upper relatively broad upper section, equally in a wedge form downwards towards the region at the bottom of the receiving channels 4. As is made most clear by Figure 1 , the side sections of wall 9 are considerably broader at the top than the central section of wall 8. The plane 12 that becomes thinner has an angle Y that appropriately lies within the region 5-10°. It follows from this that the side wall sections 9 of one front wall 3 can be said to demonstrate double-angled surfaces to the rear second wall 31. It should thus be understood that the splice sleeve 5 mounted in the channel 4 is forced down towards the bottom of the channel through the influence of the two wedge-shaped planes 12 of the side sections of wall 9, which planes are angled backwards and downwards. As a result of this, the retaining force for the splice sleeve 5 that has been mounted in the channels 4 will be a spring force and it will increase in tensile direction for the splice sleeve out from the channel.
As has been described in the introduction, the present splice holder 1 is intended to be mounted onto a distribution tray. Such a distribution tray is shown for simplicity's sake only as a fragmentary part in the drawings and it is denoted by the reference number 13. The splice holder 1 is provided with snap-on fastening means 14 in order to facilitate its mounting. As Figure 2 makes clear, the snap-on fastening means 14 are designed with hooks 15 having sharp edges that extend perpendicularly from the plane second side of the plate- shaped base 2. It is intended that the hooks 15 will interact for locking with holes 16 punched into the distribution tray whereby the hooks are caused through downwards driving to enter into locking interaction with the said holes.
The present invention is not limited to that described above and shown in the drawings: it can be changed and modified in a number of different ways within the framework of the innovative concept specified in the attached patent claims.

Claims

1. A splice holder (1 ) for optical fibres, comprising a plate-formed base (2) from one side of which a series of parallel walls (3, 3') extend that are arranged in a row after each other and situated at such a distance from each other that channels (4) for the reception of a splice sleeve (5) of a spliced optical fibre are limited between neighbouring walls in the row, characterised in that at least one wall (3) of such a defined channel (4) comprises a central wall section (8) extending from the base (2) and side sections of wall (9) extending in opposite directions from the central section of wall, which side sections are so designed that the splice sleeve (5) that is mounted in the channel is retained through a spring interaction between the free edges (11 ) of the two side walls and the second wall (31) that limits the channel.
2. The splice holder according to claim 1 , whereby the side sections of wall (9) for one wall (3) are angled backwards in a direction towards the neighbouring second wall (3').
3. The splice holder according to claim 2, whereby the side sections of wall (9) have been given such a form that the splice sleeve (5) that is mounted in the channel (4) is forced down towards the bottom of the channel.
4. The splice holder according to claim 3, whereby the side sections of wall (9) become thinner as wedges downwards towards the region at the bottom of the reception channel (4).
5. The splice holder according to claim 4, whereby the side sections of wall (9) have a thickness at the top that is greater than the thickness of the central section of wall (8).
6. The splice holder according to any one claims 1-5, whereby the walls (3, 31) are directed perpendicularly to the plate-formed base (2).
7. The splice holder according to any one claims 1-6, whereby walls (3, 3') that have both a central section of wall (8) and side sections of wall (9) are arranged in a series along the base (2) with equal distances between them.
8. The splice holder according to any one claims 1-7, comprising snap-on fastening means (14) designed to enter into locking interaction with holes in a distribution tray (13) that is arranged in a cabinet or on a frame for the support of not only loops of optical fibre cable but also splice holders.
9. The splice holder according to any one claims 1-8, manufactured as one piece of flexible injection-moulded plastic material of thermoplastic.
EP07748093A 2006-05-10 2007-05-04 Splice holder for optical fibres Withdrawn EP2016452A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0601060A SE530505C2 (en) 2006-05-10 2006-05-10 Splice holder for optical fiber
PCT/SE2007/000429 WO2007129953A1 (en) 2006-05-10 2007-05-04 Splice holder for optical fibres

Publications (2)

Publication Number Publication Date
EP2016452A1 true EP2016452A1 (en) 2009-01-21
EP2016452A4 EP2016452A4 (en) 2012-08-22

Family

ID=38667990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07748093A Withdrawn EP2016452A4 (en) 2006-05-10 2007-05-04 Splice holder for optical fibres

Country Status (3)

Country Link
EP (1) EP2016452A4 (en)
SE (1) SE530505C2 (en)
WO (1) WO2007129953A1 (en)

Families Citing this family (17)

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US8798427B2 (en) 2007-09-05 2014-08-05 Corning Cable Systems Llc Fiber optic terminal assembly
DE202008002812U1 (en) * 2008-02-28 2008-04-24 CCS Technology, Inc., Wilmington Holding device for splice protection devices with splices of optical waveguides received in the splice protection devices
CN102209921B (en) 2008-10-09 2015-11-25 康宁光缆系统有限公司 There is the fibre-optic terminus supported from the adapter panel of the input and output optical fiber of optical splitters
US8879882B2 (en) 2008-10-27 2014-11-04 Corning Cable Systems Llc Variably configurable and modular local convergence point
EP2237091A1 (en) 2009-03-31 2010-10-06 Corning Cable Systems LLC Removably mountable fiber optic terminal
US8467651B2 (en) 2009-09-30 2013-06-18 Ccs Technology Inc. Fiber optic terminals configured to dispose a fiber optic connection panel(s) within an optical fiber perimeter and related methods
DE102009049876A1 (en) * 2009-10-19 2011-04-21 Adc Gmbh Splice
US9547144B2 (en) 2010-03-16 2017-01-17 Corning Optical Communications LLC Fiber optic distribution network for multiple dwelling units
US8792767B2 (en) 2010-04-16 2014-07-29 Ccs Technology, Inc. Distribution device
CN103430072B (en) 2010-10-19 2018-08-10 康宁光缆系统有限责任公司 For the transformation box in the fiber distribution network of multitenant unit
US9219546B2 (en) 2011-12-12 2015-12-22 Corning Optical Communications LLC Extremely high frequency (EHF) distributed antenna systems, and related components and methods
US10110307B2 (en) 2012-03-02 2018-10-23 Corning Optical Communications LLC Optical network units (ONUs) for high bandwidth connectivity, and related components and methods
US9004778B2 (en) 2012-06-29 2015-04-14 Corning Cable Systems Llc Indexable optical fiber connectors and optical fiber connector arrays
US9049500B2 (en) 2012-08-31 2015-06-02 Corning Cable Systems Llc Fiber optic terminals, systems, and methods for network service management
US8909019B2 (en) 2012-10-11 2014-12-09 Ccs Technology, Inc. System comprising a plurality of distribution devices and distribution device
CN107121728B (en) * 2017-06-29 2020-04-17 常州太平通讯科技有限公司 General optical fiber fusion splice tray
CN110673262A (en) * 2018-07-02 2020-01-10 华为技术有限公司 Welding cassette and splice tray

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254163A (en) * 1991-03-08 1992-09-30 Bicc Plc Cassette for housing optical fibre joints
US5740298A (en) * 1993-09-08 1998-04-14 N.V. Raychem S.A. Optical fibre organizer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254163A (en) * 1991-03-08 1992-09-30 Bicc Plc Cassette for housing optical fibre joints
US5740298A (en) * 1993-09-08 1998-04-14 N.V. Raychem S.A. Optical fibre organizer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007129953A1 *

Also Published As

Publication number Publication date
EP2016452A4 (en) 2012-08-22
WO2007129953A1 (en) 2007-11-15
SE0601060L (en) 2007-11-11
SE530505C2 (en) 2008-06-24

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