US20090067802A1 - Distributor system and method for optical fibers - Google Patents
Distributor system and method for optical fibers Download PDFInfo
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- US20090067802A1 US20090067802A1 US12/270,531 US27053108A US2009067802A1 US 20090067802 A1 US20090067802 A1 US 20090067802A1 US 27053108 A US27053108 A US 27053108A US 2009067802 A1 US2009067802 A1 US 2009067802A1
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- Prior art keywords
- cassette
- optical fiber
- receiving structure
- spindle
- fiber
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- 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
- G02B6/4455—Cassettes characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating or gliding
Definitions
- Cassettes for the coupling of optical fibers are known for example from U.S. Pat. No. 6,282,360 B1, the cassette being able to receive the optical fibers with an excess length for a splicing reserve.
- Cassettes of this type are to be designed in such a way that at least two cassettes can be stacked one on top of the other to form a module and the excess length of the optical fiber can be received while maintaining a minimum bending radius.
- EP 0 474 091 A1 discloses a pothead arrangement for optical fibers, comprising two shells connected to each other, the first shell being formed with a splicing element.
- the shells are displaceable in a plane in relation to each other, the first shell receiving an optical fiber splicing reserve, the second shell receiving an optical fiber operating reserve and the optical fiber being arranged in such a way that it is capable of being trailed via a guide duct.
- a distributing unit is generally formed by a number of modules. It is often not possible to work on the optical fibers at an installation location of the module in the distributing unit. In particular, splicing of optical fibers on splicing elements of a cassette preferably takes place at suitable splicing locations. It is therefore known to transport a module which is in operation and in which the corresponding cassette is mounted to a suitable workplace.
- a buffered fiber fed to the module is for this purpose formed with an excess length, so that, on the basis of removal of the module from the distributing unit and transport to the workplace, the buffered fiber can yield correspondingly.
- mechanical loading of the buffered fiber on account of the movement is unavoidable. It is disadvantageous in this case that even access to individual circuits comprising only a few optical fibers requires the entire buffered fiber, and consequently also the other circuits, to undergo loading on account of the movement.
- the invention is therefore based on the technical problem of providing a device for coupling optical fibers bundled together in buffered fibers, with access to a subsystem, comprising at least one optical fiber, being possible at a workplace which is away from an installation location of the device without this affecting the other optical fibers.
- a buffered fiber which can be divided into at least two strands, one strand comprising at least one optical fiber, is fixed on a module.
- a cable tie and/or snap-in lugs provided on the module are conceivable, for example, as fixing for the buffered fiber on the module.
- the module is formed with at least one receiving device, which can receive at least two cassettes.
- the module allows the cassettes to be arranged in a compact fashion.
- a strand with excess length can be received by the cassette and the at least one optical fiber of the strand can be connected to a coupling element of the cassette.
- a cassette with a received strand can be separated from the module at the receiving device in operation.
- the optical fibers of the associated strand are moved, the excess length reaching at least from the installation location to the workplace.
- the buffered fiber and/or further strands on the other hand are not adversely affected by access to the cassette.
- An empty cassette can likewise be removable from the module, which is of advantage for example for exchanging defective cassettes.
- a number of modules can be combined to form a distribution system, it being possible for a buffered fiber to be divided between a number of modules and/or for a number of buffered fibers to be received by one module. It is evident that the excess length of the buffered fiber known in the prior art is divided among the strands in the individual cassettes, it then being possible for the buffered fiber itself to be fixed without an excess length.
- the cassette is formed with at least one guide element, the guide element defining at least one path for receiving at least one strand and a minimum radius of curvature of the path being greater than a minimum-permissible bending radius of the strand.
- the guide element is preferably formed in such a way that the winding direction of an optical fiber of the strand is reversible, so that two optical fibers of the strand can be connected by their ends coaxially to the coupling element.
- the optical fibers of a strand are assigned to a circuit or circuits dependent on one another.
- the cassette to which the strand for forming the circuit and/or the dependent circuits is fed can be removed for access to the circuits. Circuits independent of this are not, however, adversely affected by this access.
- the cassettes are formed as single-fiber cassettes, to which a circuit can be assigned.
- a circuit can be assigned.
- two optical fibers can be connected to each other by the coupling element.
- both optical fibers can be fed to the cassette as a common strand, it being possible for the strand to be formed by one or two buffered fibers.
- the optical fibers it is also conceivable for the optical fibers to be fed to the cassette through different openings, with for example only one optical fiber being taken from the buffered fiber and fed to the cassette as a strand.
- the coupling element of the cassette can be connected to an optical fiber element which is formed with a plug-in contact, at least at an end remote from the coupling element.
- the optical fiber element can be connected to the strand, i.e. to at least one optical fiber of the buffered fiber.
- the connection of the optical fiber element to the coupling element can be established for example before the module is put into operation.
- the plug-in contact allows a detachable connection to be established quickly and reliably between the strand and an external optical fiber and/or a device which are formed with a plug-in element complementing the plug-in contact.
- the cassette therefore has great flexibility. In this case, the plug-in connection can subsequently be replaced by a fixed connection, and vice versa.
- the buffered fiber itself is not moved during this necessary conversion work, the conversion performed on a cassette has no repercussions for the rest of the module.
- the plug-in contact with the associated optical fiber is simply disconnected at the coupling element and removed.
- the associated patch cable with its complementary plug-in element is removed and a new optical fiber is subsequently connected by means of the coupling element to the optical fiber of the cassette, the other end of which is firmly connected to a device.
- the coupling element is formed as a splicing element.
- a splicing element allows optical fibers to be connected in a reliable and simple way.
- a receiving device of a cassette comprises through the module a guide rail, which can be firmly connected to the module.
- the cassettes are received by the guide rails in uniquely defined positions.
- the receiving device of the cassette comprises a pivoting mechanism. Removal of the cassette is often not necessary for carrying out work on circuits.
- the pivoting mechanism has the effect that individual cassettes can be pivoted out of a module plane into a working area, optical fibers taken up by the movement only being subjected to low mechanical loading.
- a pivoting movement can be limited for example by stops and/or by guide grooves.
- the pivoting mechanism is preferably formed with at least one spindle, by which the cassette can be received.
- the cassette is formed with a groove, by which the cassette can be connected transversely to the direction of the spindle to the latter.
- the receiving device of the cassette is formed by the module with a knurled screw.
- the knurled screw has the effect that the cassette can be fixed on the module in at least one position in the module plane.
- the cassette is formed with a receiving element, by which at least one optical fiber with a fiber protection can be received. If optical fibers are sheathed with a fiber protection, they often can no longer be received in the intended paths of the cassette.
- a corresponding element which can for example be fitted onto the cassette, has the effect that the optical fibers can be protected better during transport to a workplace.
- the device is preferably an element of a telecommunications distribution system.
- FIG. 1 shows a schematic representation of a module comprising a number of cassettes which are formed as through-splicing cassettes
- FIG. 2 a shows a detail from a plan view of a receiving device and a cassette according to FIG. 1 ,
- FIG. 2 b shows a side view of the receiving device according to FIG. 2 a
- FIG. 3 shows a schematic representation of a module comprising ten cassettes, which are respectively formed with a plug-in contact
- FIG. 4 a shows a detail from a plan view of a receiving device and a cassette according to FIG. 3 and
- FIG. 4 b shows a detail from a side view of the elements according to FIG. 4 a.
- FIG. 1 schematically shows a module 1 comprising cassettes 2 and receiving devices 3 .
- the cassettes 2 are formed as single-fiber through-splicing cassettes, i.e. each cassette 2 can be assigned a circuit comprising two optical fibers.
- the optical fibers are formed for example as fiber-optic cables.
- Optical fibers which can be assigned to the module 1 are bundled together in a buffered fiber (likewise not represented).
- the buffered fiber can be fed to the module 1 via an opening 12 .
- the buffered fiber can be fixed, for example by cable ties.
- the buffered fiber is subdivided inside the module 1 into strands (likewise not represented), each strand preferably comprising two optical fibers.
- the buffered fibers can in this case again be subdivided into strands, strands being able to comprise optical fibers of the same buffered fiber or different buffered fibers.
- the strands can be fed to the cassettes 2 through channels 13 .
- the optical fibers are laid along paths, which are defined by guide elements 22 , 23 , 24 .
- the paths of the two optical fibers differ in such a way that a winding direction of an optical fiber is changed, so that the ends of the optical fibers can be connected coaxially in a coupling element 26 .
- the coupling element 26 is formed for example as a splicing unit.
- a connection of optical fibers by means of a splicing unit is preferably established at a splicing workplace.
- the associated cassette 2 can be removed from the module 1 and transported individually to a splicing workplace.
- the optical fibers are, for example, trailed along and must be of a length which is adequate for this.
- the reception of the optical fibers in the paths of the cassette 2 formed by the guide elements 22 , 23 , 24 is therefore formed in such a way that the optical fibers can be received with excess length. In this case, the excess length is chosen to correspond to the distance from the workplace plus the splicing reserve. Since the cassettes 2 can be removed individually from the module 1 , access to a circuit for example is possible without influencing other circuits which are in operation.
- the receiving devices 3 are formed with guide rails 31 , it being possible for the guide rails 31 to be connected to profiled bars 14 of the module 1 by means of clips 32 .
- the guide rail 31 is formed with spindles 34 , by which the cassettes 2 can be received.
- the cassettes 2 are formed with an aperture 27 .
- the position of the cassette 2 on the guide rail 31 and consequently in the module 1 can be fixed in a module plane by a snap-in lug 28 .
- the corresponding cassette 2 can be pivoted about an angle ⁇ from the module plane into a working area. A movement of the cassette 2 transversely in relation to the spindle 34 allows the cassette 2 also to be removed from the module 1 and transported to a suitable workplace.
- FIG. 2 a shows a plan view of a connection of the cassette 2 to the receiving device 3 .
- the reference numerals correspond here to FIG. 1 .
- the cassette 2 has been pivoted out of the module plane about the spindle 34 into the working area.
- the position of the cassette 2 can be fixed both in the working area represented and in the module plane by the snap-in lug 28 , which engages in snap-in grooves 35 of the receiving device.
- FIG. 2 b shows a detail of a side view of the receiving device 3 .
- the cassette 2 (not represented) engages with the groove 27 in an annular groove 38 on the spindle 34 .
- a translatory movement of the cassette 2 along the spindle is restricted as a result.
- FIG. 3 schematically shows a module 1 ′ for receiving cassettes 2 ′.
- the same reference numerals have been used for elements which correspond to the elements from FIG. 1 .
- One or more buffered fibers is or are fed to the module 1 ′ through the opening 12 and subdivided into twelve individual strands. Each strand in this case comprises only one optical fiber.
- a strand can be fed to a cassette 2 ′ along a channel 13 .
- the cassettes 2 ′ are formed with guide elements for receiving the strand, which however are covered by a receiving element 21 .
- the strand can be connected to a coupling element, which is likewise covered by the receiving element 21 .
- At least a second optical fiber 5 can be received by the cassette 2 ′.
- the optical fiber 5 can be connected by one end to the coupling element.
- the other end of the optical fiber 5 is formed as a plug-in contact 52 .
- a buffered fiber 51 of the optical fiber 5 is led along a path defined by guide elements in the cassette 2 ′.
- the plug-in contact 52 allows the optical fiber 5 to be connected to further optical fibers 6 which are formed with a plug-in element 62 complementing the plug-in contact 52 .
- the connection to an optical fiber 6 is therefore extremely flexible and can be adapted quickly to changing requirements.
- the length of the buffered fiber 52 is to be chosen to correspond to the application. In the embodiment represented, contacts with further optical fibers 6 are established directly at the cassette 2 ′. In addition, it is also conceivable to use the plug-in contact 52 to establish a contact with a device which is away from the module 1 ′.
- the length of the buffered fiber 51 is to be adapted accordingly. For great flexibility, the buffered fiber 51 is preferably formed with excess length, which can be received in the cassette 2 ′ in the paths provided for it.
- optical fibers are protected by the cassette 2 ′ and the module 1 ′ against mechanical loading. If, however, the cassettes 2 ′ are removed from the module 1 ′ and transported to a workplace—for example a splicing location, the optical fibers must be partly removed from the cassette 2 ′. To be able to protect the optical fiber better against mechanical loads in this case, the optical fiber can be sheathed with a fiber protection (not represented). However, optical fibers with fiber protection cannot be received by the paths which are defined by the guide elements 22 , 23 and 24 visible in FIG. 1 . Instead, the cassette 2 ′ is formed with the receiving element 21 . Optical fibers with fiber protection can be received by the receiving element 21 .
- a receiving device 3 ′ of the cassette 2 ′ through the module 1 ′ comprises a guide rail 31 ′, which is connected by the clips 32 to the profiled bars 14 of the module 1 ′.
- the cassettes 2 ′ have grooves 27 , by which they can be fitted onto spindles 34 of the guide rails 31 ′. Knurled screws 36 allow the position of the cassettes 2 ′ in the module plane to be fixed better.
- FIG. 4 a shows a plan view of the connection of the cassette 2 ′ to the receiving device 3 ′.
- the reference numerals correspond in this case to FIG. 3 .
- the cassette 2 ′ has been pivoted out of the module plane about the spindle 34 into the working area and removed from the module 1 ′.
- the position of the cassette 2 ′ both in the working area and in the module plane can be fixed by the snap-in lug 28 , which engages in snap-in grooves 35 of the receiving device.
- the connection is also reinforced by the knurled screw 36 .
- the knurled screw 36 is formed with a snap-in profile 37 (which cannot be seen), which complements a snap-in profile 29 on the cassette 2 ′.
- FIG. 4 b shows a side view of the components according to FIG. 4 a .
- the cassette 2 ′ is moved transversely in relation to the spindle 34 , so that the groove 27 engages in the annular groove 28 on the spindle 34 .
- a translatory movement of the cassette 2 along the spindle is restricted as a result.
- the knurled screw 36 is moved in the axial direction by a screwing movement about the spindle 34 .
- the snap-in profile 37 engages in the complementary snap-in profile 29 .
- the cassette 2 ′ can be positively connected to the receiving device 3 ′.
- modules 1 , 1 ′ which have both through-splicing cassettes and cassettes with plug-in contacts are also conceivable. Since the cassettes can be removed from the modules at any time, corresponding adaptation is also possible after installation for the first time.
- the modules are, for example, elements of a telecommunications distribution system.
Abstract
Certain embodiments of a device for coupling fibre optic cables include at least one module equipped with at least one retaining unit for retaining at least two cassettes. Each cassette, which is configured with at least one coupling element, is pivotally and removeably attached to the retaining unit. Each cassette is configured to receive and store an excess length of the first optical fiber from the receiving structure.
Description
- This application is a Continuation of U.S. Ser. No. 10/531,146, filed 29 Mar. 2006, which is a National Stage of PCT/EP2003/012119, filed 31 Oct. 2003, which claims benefit of Serial No. 102 55 561.3, filed 22 Nov. 2002 in Germany and which applications are incorporated herein by reference. To the extent appropriate, a claim of priority is made to each of the above disclosed applications.
- It is known to couple optical fibers in cassettes. Cassettes for the coupling of optical fibers are known for example from U.S. Pat. No. 6,282,360 B1, the cassette being able to receive the optical fibers with an excess length for a splicing reserve. Cassettes of this type are to be designed in such a way that at least two cassettes can be stacked one on top of the other to form a module and the excess length of the optical fiber can be received while maintaining a minimum bending radius. For access to an optical fiber, it is in this case known to form the cassette in such a way that it can be pivoted in relation to the module.
- In addition, EP 0 474 091 A1 discloses a pothead arrangement for optical fibers, comprising two shells connected to each other, the first shell being formed with a splicing element. For access to the splicing element, the shells are displaceable in a plane in relation to each other, the first shell receiving an optical fiber splicing reserve, the second shell receiving an optical fiber operating reserve and the optical fiber being arranged in such a way that it is capable of being trailed via a guide duct.
- A distributing unit is generally formed by a number of modules. It is often not possible to work on the optical fibers at an installation location of the module in the distributing unit. In particular, splicing of optical fibers on splicing elements of a cassette preferably takes place at suitable splicing locations. It is therefore known to transport a module which is in operation and in which the corresponding cassette is mounted to a suitable workplace. A buffered fiber fed to the module is for this purpose formed with an excess length, so that, on the basis of removal of the module from the distributing unit and transport to the workplace, the buffered fiber can yield correspondingly. However, mechanical loading of the buffered fiber on account of the movement is unavoidable. It is disadvantageous in this case that even access to individual circuits comprising only a few optical fibers requires the entire buffered fiber, and consequently also the other circuits, to undergo loading on account of the movement.
- The invention is therefore based on the technical problem of providing a device for coupling optical fibers bundled together in buffered fibers, with access to a subsystem, comprising at least one optical fiber, being possible at a workplace which is away from an installation location of the device without this affecting the other optical fibers.
- A buffered fiber which can be divided into at least two strands, one strand comprising at least one optical fiber, is fixed on a module. A cable tie and/or snap-in lugs provided on the module are conceivable, for example, as fixing for the buffered fiber on the module. The module is formed with at least one receiving device, which can receive at least two cassettes. The module allows the cassettes to be arranged in a compact fashion. A strand with excess length can be received by the cassette and the at least one optical fiber of the strand can be connected to a coupling element of the cassette. For working at a workplace, a cassette with a received strand can be separated from the module at the receiving device in operation. In this case, the optical fibers of the associated strand are moved, the excess length reaching at least from the installation location to the workplace. The buffered fiber and/or further strands on the other hand are not adversely affected by access to the cassette. An empty cassette can likewise be removable from the module, which is of advantage for example for exchanging defective cassettes. A number of modules can be combined to form a distribution system, it being possible for a buffered fiber to be divided between a number of modules and/or for a number of buffered fibers to be received by one module. It is evident that the excess length of the buffered fiber known in the prior art is divided among the strands in the individual cassettes, it then being possible for the buffered fiber itself to be fixed without an excess length.
- In a preferred embodiment, the cassette is formed with at least one guide element, the guide element defining at least one path for receiving at least one strand and a minimum radius of curvature of the path being greater than a minimum-permissible bending radius of the strand. The guide element is preferably formed in such a way that the winding direction of an optical fiber of the strand is reversible, so that two optical fibers of the strand can be connected by their ends coaxially to the coupling element.
- In a further embodiment, the optical fibers of a strand are assigned to a circuit or circuits dependent on one another. During operation, the cassette to which the strand for forming the circuit and/or the dependent circuits is fed can be removed for access to the circuits. Circuits independent of this are not, however, adversely affected by this access.
- In a preferred embodiment, the cassettes are formed as single-fiber cassettes, to which a circuit can be assigned. To form the circuit, two optical fibers can be connected to each other by the coupling element. In this case, both optical fibers can be fed to the cassette as a common strand, it being possible for the strand to be formed by one or two buffered fibers. In addition, it is also conceivable for the optical fibers to be fed to the cassette through different openings, with for example only one optical fiber being taken from the buffered fiber and fed to the cassette as a strand.
- In a further embodiment, the coupling element of the cassette can be connected to an optical fiber element which is formed with a plug-in contact, at least at an end remote from the coupling element. By means of the coupling element, the optical fiber element can be connected to the strand, i.e. to at least one optical fiber of the buffered fiber. The connection of the optical fiber element to the coupling element can be established for example before the module is put into operation. The plug-in contact allows a detachable connection to be established quickly and reliably between the strand and an external optical fiber and/or a device which are formed with a plug-in element complementing the plug-in contact. The cassette therefore has great flexibility. In this case, the plug-in connection can subsequently be replaced by a fixed connection, and vice versa. On account of the fact that the buffered fiber itself is not moved during this necessary conversion work, the conversion performed on a cassette has no repercussions for the rest of the module.
- For this purpose, the plug-in contact with the associated optical fiber is simply disconnected at the coupling element and removed. Similarly, the associated patch cable with its complementary plug-in element is removed and a new optical fiber is subsequently connected by means of the coupling element to the optical fiber of the cassette, the other end of which is firmly connected to a device.
- In a further embodiment, the coupling element is formed as a splicing element. A splicing element allows optical fibers to be connected in a reliable and simple way.
- In a further embodiment, a receiving device of a cassette comprises through the module a guide rail, which can be firmly connected to the module. The cassettes are received by the guide rails in uniquely defined positions.
- In a further embodiment, the receiving device of the cassette comprises a pivoting mechanism. Removal of the cassette is often not necessary for carrying out work on circuits. The pivoting mechanism has the effect that individual cassettes can be pivoted out of a module plane into a working area, optical fibers taken up by the movement only being subjected to low mechanical loading. A pivoting movement can be limited for example by stops and/or by guide grooves.
- For this purpose, the pivoting mechanism is preferably formed with at least one spindle, by which the cassette can be received. For this purpose, the cassette is formed with a groove, by which the cassette can be connected transversely to the direction of the spindle to the latter. In addition, it is also conceivable to form the cassette with an aperture, so that the cassette can be fitted onto the spindle in the axial direction.
- In a further embodiment, the receiving device of the cassette is formed by the module with a knurled screw. The knurled screw has the effect that the cassette can be fixed on the module in at least one position in the module plane.
- Instead of the knurled screw, it is also conceivable to provide snap-in lugs on the module and/or on the cassette.
- In a further embodiment, the cassette is formed with a receiving element, by which at least one optical fiber with a fiber protection can be received. If optical fibers are sheathed with a fiber protection, they often can no longer be received in the intended paths of the cassette. A corresponding element, which can for example be fitted onto the cassette, has the effect that the optical fibers can be protected better during transport to a workplace.
- The device is preferably an element of a telecommunications distribution system.
- The invention is explained in more detail below on the basis of a preferred exemplary embodiment. In the figures:
-
FIG. 1 shows a schematic representation of a module comprising a number of cassettes which are formed as through-splicing cassettes, -
FIG. 2 a shows a detail from a plan view of a receiving device and a cassette according toFIG. 1 , -
FIG. 2 b shows a side view of the receiving device according toFIG. 2 a, -
FIG. 3 shows a schematic representation of a module comprising ten cassettes, which are respectively formed with a plug-in contact, -
FIG. 4 a shows a detail from a plan view of a receiving device and a cassette according toFIG. 3 and -
FIG. 4 b shows a detail from a side view of the elements according toFIG. 4 a. -
FIG. 1 schematically shows a module 1 comprisingcassettes 2 and receivingdevices 3. Thecassettes 2 are formed as single-fiber through-splicing cassettes, i.e. eachcassette 2 can be assigned a circuit comprising two optical fibers. The optical fibers are formed for example as fiber-optic cables. - Optical fibers (not represented) which can be assigned to the module 1 are bundled together in a buffered fiber (likewise not represented). The buffered fiber can be fed to the module 1 via an
opening 12. At theopening 12, the buffered fiber can be fixed, for example by cable ties. The buffered fiber is subdivided inside the module 1 into strands (likewise not represented), each strand preferably comprising two optical fibers. In addition, it is also conceivable to feed a number of buffered fibers to the module 1 through theopening 12. The buffered fibers can in this case again be subdivided into strands, strands being able to comprise optical fibers of the same buffered fiber or different buffered fibers. The strands can be fed to thecassettes 2 throughchannels 13. - In the
cassette 2, the optical fibers are laid along paths, which are defined byguide elements coupling element 26. - For a connection of the optical fibers, the
coupling element 26 is formed for example as a splicing unit. A connection of optical fibers by means of a splicing unit is preferably established at a splicing workplace. For this purpose, the associatedcassette 2 can be removed from the module 1 and transported individually to a splicing workplace. For this purpose, the optical fibers are, for example, trailed along and must be of a length which is adequate for this. The reception of the optical fibers in the paths of thecassette 2 formed by theguide elements cassettes 2 can be removed individually from the module 1, access to a circuit for example is possible without influencing other circuits which are in operation. - The receiving
devices 3 are formed withguide rails 31, it being possible for the guide rails 31 to be connected to profiledbars 14 of the module 1 by means ofclips 32. Theguide rail 31 is formed withspindles 34, by which thecassettes 2 can be received. For this purpose, thecassettes 2 are formed with anaperture 27. The position of thecassette 2 on theguide rail 31 and consequently in the module 1 can be fixed in a module plane by a snap-inlug 28. For access to a circuit, thecorresponding cassette 2 can be pivoted about an angle φ from the module plane into a working area. A movement of thecassette 2 transversely in relation to thespindle 34 allows thecassette 2 also to be removed from the module 1 and transported to a suitable workplace. -
FIG. 2 a shows a plan view of a connection of thecassette 2 to the receivingdevice 3. The reference numerals correspond here toFIG. 1 . In the representation, thecassette 2 has been pivoted out of the module plane about thespindle 34 into the working area. The position of thecassette 2 can be fixed both in the working area represented and in the module plane by the snap-inlug 28, which engages in snap-ingrooves 35 of the receiving device. -
FIG. 2 b shows a detail of a side view of the receivingdevice 3. The cassette 2 (not represented) engages with thegroove 27 in anannular groove 38 on thespindle 34. A translatory movement of thecassette 2 along the spindle is restricted as a result. -
FIG. 3 schematically shows a module 1′ for receivingcassettes 2′. The same reference numerals have been used for elements which correspond to the elements fromFIG. 1 . One or more buffered fibers is or are fed to the module 1′ through theopening 12 and subdivided into twelve individual strands. Each strand in this case comprises only one optical fiber. A strand can be fed to acassette 2′ along achannel 13. In a way analogous to thecassettes 2 represented inFIG. 1 , thecassettes 2′ are formed with guide elements for receiving the strand, which however are covered by a receivingelement 21. The strand can be connected to a coupling element, which is likewise covered by the receivingelement 21. - Apart from the strand which can be fed to the
cassette 2′ through thechannel 13, at least a secondoptical fiber 5 can be received by thecassette 2′. Theoptical fiber 5 can be connected by one end to the coupling element. The other end of theoptical fiber 5 is formed as a plug-incontact 52. A bufferedfiber 51 of theoptical fiber 5 is led along a path defined by guide elements in thecassette 2′. - The plug-in
contact 52 allows theoptical fiber 5 to be connected to further optical fibers 6 which are formed with a plug-inelement 62 complementing the plug-incontact 52. The connection to an optical fiber 6 is therefore extremely flexible and can be adapted quickly to changing requirements. The length of the bufferedfiber 52 is to be chosen to correspond to the application. In the embodiment represented, contacts with further optical fibers 6 are established directly at thecassette 2′. In addition, it is also conceivable to use the plug-incontact 52 to establish a contact with a device which is away from the module 1′. The length of the bufferedfiber 51 is to be adapted accordingly. For great flexibility, the bufferedfiber 51 is preferably formed with excess length, which can be received in thecassette 2′ in the paths provided for it. - The optical fibers are protected by the
cassette 2′ and the module 1′ against mechanical loading. If, however, thecassettes 2′ are removed from the module 1′ and transported to a workplace—for example a splicing location, the optical fibers must be partly removed from thecassette 2′. To be able to protect the optical fiber better against mechanical loads in this case, the optical fiber can be sheathed with a fiber protection (not represented). However, optical fibers with fiber protection cannot be received by the paths which are defined by theguide elements FIG. 1 . Instead, thecassette 2′ is formed with the receivingelement 21. Optical fibers with fiber protection can be received by the receivingelement 21. - A receiving
device 3′ of thecassette 2′ through the module 1′ comprises aguide rail 31′, which is connected by theclips 32 to the profiled bars 14 of the module 1′. In a way analogous to thecassettes 2 represented inFIG. 1 , thecassettes 2′ havegrooves 27, by which they can be fitted ontospindles 34 of the guide rails 31′. Knurled screws 36 allow the position of thecassettes 2′ in the module plane to be fixed better. -
FIG. 4 a shows a plan view of the connection of thecassette 2′ to the receivingdevice 3′. The reference numerals correspond in this case toFIG. 3 . In the representation, thecassette 2′ has been pivoted out of the module plane about thespindle 34 into the working area and removed from the module 1′. The position of thecassette 2′ both in the working area and in the module plane can be fixed by the snap-inlug 28, which engages in snap-ingrooves 35 of the receiving device. The connection is also reinforced by theknurled screw 36. On the underside, theknurled screw 36 is formed with a snap-in profile 37 (which cannot be seen), which complements a snap-inprofile 29 on thecassette 2′. -
FIG. 4 b shows a side view of the components according toFIG. 4 a. For thecassette 2′ to be received by the receivingdevice 3′, thecassette 2′ is moved transversely in relation to thespindle 34, so that thegroove 27 engages in theannular groove 28 on thespindle 34. A translatory movement of thecassette 2 along the spindle is restricted as a result. Theknurled screw 36 is moved in the axial direction by a screwing movement about thespindle 34. As this happens, the snap-inprofile 37 engages in the complementary snap-inprofile 29. As a result, thecassette 2′ can be positively connected to the receivingdevice 3′. - Apart from the modules 1, 1′ represented, modules which have both through-splicing cassettes and cassettes with plug-in contacts are also conceivable. Since the cassettes can be removed from the modules at any time, corresponding adaptation is also possible after installation for the first time.
- The modules are, for example, elements of a telecommunications distribution system. By the removal of individual cassettes, access to an individual customer circuit is possible even after installation for the first time, during operation, without influencing other customer circuits which are in operation.
-
LIST OF DESIGNATIONS 1 module 1′ module 12 opening 13 channel 14 profiled bar 2 cassette 2′ cassette 21 receiving element 22 guide element 23 guide element 24 guide element 26 coupling element 27 groove 28 snap-in lug 29 snap-in profile 3 receiving device 3 ′ receiving device 31 guide rail 32 clip 34 spindle 35 snap-in groove 36 knurled screw 37 snap-in profile 38 annular groove 5 optical fiber 51 buffered fiber 52 plug-in contact 6 optical fiber 61 buffered fiber 62 plug-in element
Claims (20)
1. A device comprising:
a receiving structure defining at least one channel configured to receive a first optical fiber, the receiving structure including a spindle;
a first cassette configured to pivotally couple to the receiving structure, the first cassette defining a groove configured to cooperates with the spindle to form a pivot point about which the first cassette pivots from a first position to a second position, the first cassette also being configured to be separated and removed from the receiving structure by pivoting the first cassette to the second position and sliding the first cassette in a direction transverse to the spindle until the spindle passes through an open end of the groove;
wherein the first cassette is configured to receive and store an excess length of the first optical fiber from the receiving structure.
2. The device of claim 1 , wherein the first cassette includes a first coupling element configured to optically couple the first optical fiber to a second optical fiber.
3. The device of claim 2 , wherein the first coupling element is formed as a splicing unit.
4. The device of claim 2 , wherein the first coupling element is configured to receive first and second plug-in contacts.
5. The device of claim 2 , further comprising a second cassette configured to pivotally couple to the receiving structure, the second cassette having a second coupling element configured to receive and store a wound, excess length of a third optical fiber.
6. The device of claim 5 , wherein the second cassette is removeably coupled to the receiving structure.
7. The device of claim 5 , wherein the second optical fiber forms a buffered fiber cable with the first optical fiber.
8. The device of claim 5 , wherein the first and second optical fibers form separate buffered fiber cables.
9. The device of claim 1 , wherein the receiving structure includes a housing defining a cavity, wherein the first cassette is positioned within the housing when the first cassette is pivoted to the first position; and wherein the first cassette is positioned at least partially outside the housing when the first cassette is pivoted to the second position.
10. The device of claim 4 , further comprising a plurality of cassettes configured to pivotally couple to the receiving structure.
11. The device of claim 1 , wherein the first cassette includes at least a first guide element defining at least one path for receiving at least the first optical fiber, the path defined by the guide element including a minimum radius of curvature greater than a minimum-permissible bend radius of the first optical fiber.
12. A device comprising:
a receiving structure defining a channel and including a spindle;
a first cassette pivotally mounted to the spindle of the receiving structure, the first cassette including a splicing unit and at least one guide element, the first cassette defining a groove having an open end and a closed end, the groove being configured to receive the spindle of the receiving structure through the open end to mount the first cassette to the receiving structure, the closed end of the groove cooperating with the spindle to form a pivot point about which the first cassette pivots, the first cassette being configured to pivot about the pivot point from a first position to a second position, the first cassette also being configured to be separated and removed from the receiving structure by pivoting the first cassette to the second position and sliding the first cassette so that the spindle passes through the open end of the groove in a direction transverse to the spindle;
a first optical fiber extending through the channel in the receiving structure to the first cassette, the first optical fiber being routed to the splicing unit by the guide element; and
a second optical fiber extending through the channel in the receiving structure to the first cassette, the second optical fiber being routed to the splicing unit by the guide element, wherein the second optical fiber is spliced to the first optical fiber and secured to the splicing unit of the first cassette.
13. The device of claim 12 , wherein the receiving structure includes a housing defining a cavity, wherein the first cassette is positioned within the housing when the first cassette is pivoted to the first position; and wherein the first cassette is positioned at least partially outside the housing when the first cassette is pivoted to the second position.
14. The device of claim 12 , further comprising a second cassette configured to pivotally couple to the receiving structure, the second cassette including a second splicing unit and at least a second guide element, the second cassette being configured to receive and store a wound, excess length of a third optical fiber.
15. The device of claim 14 , wherein the second cassette is removeably coupled to the receiving structure.
16. The device of claim 14 , wherein the second optical fiber forms a buffered fiber cable with the first optical fiber.
17. The device of claim 14 , wherein the first and second optical fibers form separate buffered fiber cables.
18. The device of claim 14 , further comprising a plurality of cassettes configured to pivotally couple to the receiving structure.
19. A method comprising:
pivoting a cassette for storing excess optical fiber about a spindle of the receiving structure from a first position to a second position;
removing the cassette from the receiving structure by moving the cassette in a direction transverse to the spindle when the cassette is arranged in the second position;
unwinding a length of at least a first optical fiber stored on the cassette; and
transporting the cassette to a workplace.
20. The method of claim 19 , further comprising:
coupling a second optical fiber to the first optical fiber when the cassette is at the workplace;
storing the first optical fiber and the second optical fiber on the cassette;
returning the cassette to the receiving structure by moving the cassette transverse to the spindle to arrange the cassette is the second position; and
pivoting the cassette back to the first position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/270,531 US20090067802A1 (en) | 2002-11-22 | 2008-11-13 | Distributor system and method for optical fibers |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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DE10255561.3 | 2002-11-22 | ||
DE10255561A DE10255561A1 (en) | 2002-11-22 | 2002-11-22 | Method and device for coupling optical fibers |
US10/531,146 US7460757B2 (en) | 2002-11-22 | 2003-10-31 | Distributor system and method for fibre optic cables |
PCT/EP2003/012119 WO2004049029A1 (en) | 2002-11-22 | 2003-10-31 | Distributor system and method for fibre optic cables |
US12/270,531 US20090067802A1 (en) | 2002-11-22 | 2008-11-13 | Distributor system and method for optical fibers |
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US11/531,146 Continuation US7689004B2 (en) | 2006-09-12 | 2006-09-12 | Method and apparatus for evaluating the quality of document images |
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US12/270,531 Abandoned US20090067802A1 (en) | 2002-11-22 | 2008-11-13 | Distributor system and method for optical fibers |
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Also Published As
Publication number | Publication date |
---|---|
AU2003274100A1 (en) | 2004-06-18 |
WO2004049029A1 (en) | 2004-06-10 |
AR042112A1 (en) | 2005-06-08 |
DE10255561A1 (en) | 2004-06-09 |
MY138625A (en) | 2009-07-31 |
US20060193586A1 (en) | 2006-08-31 |
US7460757B2 (en) | 2008-12-02 |
TW200428054A (en) | 2004-12-16 |
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Owner name: COMMSCOPE TECHNOLOGIES LLC, NORTH CAROLINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COMMSCOPE EMEA LIMITED;REEL/FRAME:037012/0001 Effective date: 20150828 |