CA2028745A1 - Method and device for stripping the insulation from the end portions of optical cables - Google Patents
Method and device for stripping the insulation from the end portions of optical cablesInfo
- Publication number
- CA2028745A1 CA2028745A1 CA002028745A CA2028745A CA2028745A1 CA 2028745 A1 CA2028745 A1 CA 2028745A1 CA 002028745 A CA002028745 A CA 002028745A CA 2028745 A CA2028745 A CA 2028745A CA 2028745 A1 CA2028745 A1 CA 2028745A1
- Authority
- CA
- Canada
- Prior art keywords
- jacket
- clamping
- fiber
- working
- fiber jacket
- 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
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
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/56—Processes for repairing optical cables
- G02B6/566—Devices for opening or removing the mantle
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Abstract The fiber jacket (7), lying between the inner jacket (3) and the outer jacket (7) of an optical cable (1) is blown upon with a nozzle (10) and by this means bent away to one side. The fiber jacket can thus be grasped in a clamping device (11) and separated with a separating device (9). The deflection of the fiber jacket makes possible an effective separation without consideration of the delicate optical fibre (2). (Figure 3)
Description
:
2028~5 PDI027/02 . l 0 . 90 Diamond SA, 6616 Losone Method and device for stripping the irsulation from the end portions of optical cables The invention concerns a method of stripping the insulation from the end por~ions of optical cables according to the preamble of claim 1, as well as a device for carrying out the method according to the preamble of claim 9.
As opposed to conventional electrical cables, the stripping of insulation from optical cables is more difficult and time consuming, since the optical fiber is extremely delicate and since it possesses numerous protective layers. For this reason, the stripping of insulation is nowadays carried out to a large extent manually, with the aid of hand tools. Auxiliary devices for stripping the insulation are indeed already known to some degree, but do nc~ yet permit complete automation.
Thus, through for example DE-A-34 06 917, a device for the removal of the layers attached to the glass fibers of optical cables has been made known, exhibiting moveable sem~rcular internally ground cutters.
The cutters are connected to a guide in such a way that the optical fibre is centered and that the penetration of the cutters is limited to a preset depth. The layers to be removed can be warmed with a heating system, which fa( ilitates the removal procedure. Indeed, with this kind of device the outer jacket and, if nescessary, the inner jacket of the cable can be removed in separate working steps. The extremely tough fiberer jacket does not, however, permit separation, or permits only incomplete separation, with the radial movement of the cutters. Thus, after the removal of the outer jacket, it must be cut-off manually with shears .
The increasing app]ication of glass fiber cables requires efficient manufacture of connectors. For this purpose, stripping of the insulation must also be automatecl in order on the one hand to reduce the -- - - - - , : . :, , ~ , .'' . ' .
. ~ .
2028~5 PDI027/02 . l 0 . 90 Diamond SA, 6616 Losone Method and device for stripping the irsulation from the end portions of optical cables The invention concerns a method of stripping the insulation from the end por~ions of optical cables according to the preamble of claim 1, as well as a device for carrying out the method according to the preamble of claim 9.
As opposed to conventional electrical cables, the stripping of insulation from optical cables is more difficult and time consuming, since the optical fiber is extremely delicate and since it possesses numerous protective layers. For this reason, the stripping of insulation is nowadays carried out to a large extent manually, with the aid of hand tools. Auxiliary devices for stripping the insulation are indeed already known to some degree, but do nc~ yet permit complete automation.
Thus, through for example DE-A-34 06 917, a device for the removal of the layers attached to the glass fibers of optical cables has been made known, exhibiting moveable sem~rcular internally ground cutters.
The cutters are connected to a guide in such a way that the optical fibre is centered and that the penetration of the cutters is limited to a preset depth. The layers to be removed can be warmed with a heating system, which fa( ilitates the removal procedure. Indeed, with this kind of device the outer jacket and, if nescessary, the inner jacket of the cable can be removed in separate working steps. The extremely tough fiberer jacket does not, however, permit separation, or permits only incomplete separation, with the radial movement of the cutters. Thus, after the removal of the outer jacket, it must be cut-off manually with shears .
The increasing app]ication of glass fiber cables requires efficient manufacture of connectors. For this purpose, stripping of the insulation must also be automatecl in order on the one hand to reduce the -- - - - - , : . :, , ~ , .'' . ' .
. ~ .
2~287~15 working time and on the other hand to achieve an end portion which is as uniformly worked as possible. It is therefore a purpose of the invention to create a method of the type mentioned in the introduction, with the aid of which the end portion can be str~pped of its insulation down to the optical fiber in an efficient way, without the need to employ hand tools. In particular, the separation of the fiber jacket should ensue automatically. Finally, a further purpose of the invention comprises the creation of a device with which the method can be carried out in a simple way and which permits its application as widely as possible, so that different types of cable can be worked on. With regard to the method, this purpose is fuli~illed with a method exhibiting the features of claim ].
The bending away of the fiber jacket through blowing or suction enables the fiber jacket to be gripped and separated in the s~mplest way. Since the fiber jacket comprises numerous thread-Like hairs, it can be bent away through 90 degrees without difficulty so that the optical fiber with its inner jacket can be completely revealed. The inner jacket has, in comparison to the fiber jacket, a much higher stiffness so that it is not effected by blowing or suction. The bending away of the fiber jacket now permits the use of an effective cutting tool without the need for consideration of the delicate optical fiber. ;
In a protecting way, either before or after the separation of the fiberjacket, the inner jacket can be first cut into and subsequently -withdrawn, if nescessary under the influence of applied heat. The inner jacket could, however, also be removed in another way. It could, for example, be immersed in a solvent and removed in that way.
The fiber jacket can be separated with a separating disk which is displaceable in relation to the cable. The separating disk ensures clean separation of the relatively tough fiber jacket. However, other separating tools would also be conceivable, such as for example an oscillating cutting blade or a shear. It is more advantageous still, however, if the fiber }acket is held between two separating jaws, of ~ ~
which at least one exhibits a wedge shaped cross section and if the -. .:
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separating jaws are pressed against each other until the ~er jacket has been completely separated.
The method can be automated in an especially simple way if the end portions are gripped by a transport device and are guided to different working st~tions in sequence, and if respectively one working procedure is carried out at each working station after each feed cycle.
In this way no idle time occurs at the individual working stations, since wiith each cycle each working station is provided with an end portion. The end portions could also be held stationary, whilst different working tools are brought up in sequence and removed again.
With regard to the device, the purpose is fulfilled with a device exhibiting the features of claim 9. The elements of the separating device, namely nozzle, clamping device and separation element, can be realised in very differing ways. Preferably, the clamping device possesses a clamping bed for acceptance of the bent-down fiber jacket and a clamping element which is able to be pressed against the clamping bed. The clamping bed can at the same time exhibit a holding section wIthin which the fiber jacket is able to be freely tensioned when the clamping element is closed, whereby the separating element can be introduced into the holding section. The tensioning of the fiber jacket within the holding section is important to ensure a clean cut.
The individual working steps can ensue at separate working stations, whereby the end portion can be conveyed from one station to another with the aid of a transport device. For this purpose the transport device can exhibit clamping jaws which move back and forth between the working stations and in this way convey the end portions further.
The clamping jaws could, however, also be fixed on an endless conveyer chain which is moved forwards cyclically. In this way the end portions remain fixed in the clamping jaws from the first to the last working station.
A simple and logical grouping of the working stations will arise if these are arranged linearly, and if the clamping jaws are arranged on a 20287~5 mobile conveyer strip. The linear feed does not result in twisting of the cables since the working stations can be arranged relatively close to one another. Apart from that, an operator can monitor all working stations easily. The clamping jaws could be activated simultaneously with a com mon activation element. A rotational feed, for example in which the clamping jaws are arranged on a turntable which rotates past the fixed position working stations, would also, however, be conceivable.
Further advantages and individual features of the invention arise from the following description of embodiments and from the drawings.
Namely:
Fig. I the end portion of an optical cable, Fig. 2 cutting into and withdrawing the outer jacket, Fig. 3 bending away and clamping the fiber jacket, Fig. 4 cutting into the inner jacket, Fig. 5 heating and withdrawing the inner jacket, Fig. 6 the end portion, completely sbipped of its insulation, Fig. 7 a side view of a device according to the invention in a very simplified representation, Fig. 8 a plan view of a device according to the invention with different working stations, Fig. g a longitudinal section through the transport device, ;
Fig . l O a cross section through the transport device according to figure 9, .:: ,. . . . . .
ZOZ8~5 Fig.11 a cross section through the separating device, Fig.12 a plan view of a separating device according to figure 11, Fig.13 an alternative embodiment of the invention with stationary point of fixation when the outer jacket is being removed, Fig.14 the device according to figure 13 when the fiber jacket is being bent away, Fig.15 the device according to figure 14 when the inner jacket is being removed, Fig.16 a front view of the device according to figure 15, Fig.17 an alternative embodiment of a separating device, and Fig.~8 - 20 different types of embodiment of separating jaws on the device according to figure 17.
In figures 1 to 6, an insulation stripping procedure on a greatly enlarged optical cable is schematically represented in the individual working steps. The optical cable 1 comprises the actual optical fiber 2 in the form of a glass fiber, which is protected by different surrounding layers . An inner jacket 3 is arranged im mediately surrounding tne optical fiber which, however, is as a rule built up in two steps and exhibits a so-called core 4 of plastic material and a microcoating 5, for example of silicon. A fiber jacket 6, made of a bundle of very tough fibers of high tensile strength, surrounds the inner jacket 3. This fiber jacket serves to relieve tensile loads in the cable arising from, for example, knocks, kinking etc. The fiber jacket can, for example, be made from glass fiber yarn or aramide (for example KEVLAR, registered trade mark) or from a mixture of these materials.
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The fiber jacket is surrounded by an outer jacket 7 which exhibits a comparatively larger wall thickness and is made from a plastic material.
The optical cable shown has in real;ty an outer diameter of between approximately 2 to 4 mm, whilst the outer cliameter of the inner jacket 3 amounts ~o approximately 0,9mm. The diameter of the optical fiber is less than 0,2mm, which requires extremely careful hand~ing when stripping the insulation.
As can be observed in figure 2, the outer jacket 7 is cut into with the aid of cutting blades 16 down to the fiber jacket and then bent away. This can ensue with a tool which operates within the general principles of stripping pliers, whereby the cutting depth can be adjusted. The withdrawal of the outer jacket 7 ensues coaxially to the -optical fiber, in the direction of the arrow d. With that, either the cutting blades 16 can be moved or the remaining cable can be pulled back from stationary blades.
Figure 3 shows the bending away of the fiber jacket 6 with the aid of a blowing nozzle l0, which directs compressed air, for example, in the direction of the arrow e at approximately rightangles against the optical ~ ~ -cable 1. The fiber jacket can thus be held in a clamping device ll.
The clamping device exhibits a clamping bed 13 which serves as an ~`
opposing bed for a clamping element, for example in the form af a swivel arm 14. After the fiber jacket 6 has been held firmly, a separating element, such as, for example, a separating disk 12, is mo~ed against the fiber jacket in the direction of the arrow f. The ;~
separating disk rc~tates in the direction of the arrow g ~i h a relatively high rotational speed, so that a clean cut is ensured. The clamping device 11 and the separating disk 12 are components of a separating device 9, which could, however, also exhibit other elements. The separating disk could also approach the fiber jacket from the cJther side.
Figure 4 shows the inner jacket 3, which has been freed from the outer jacket and the Eiber jacket. Of the fiber jacket 6, only a short 2~ 5 beard remains visible which does not, however, disturb subsequent working. Now the inner jacket 3 is cut into down as far as the microcoating with the aid of a cutting blade 17.
The detachment of the inner jacke~ requires extreme care and for this reason ensues in a separate working sequence according to figure 5.
The inner jacket 3, which has already been cut into, is grasped by heating pads 18 and withdrawn in the direction of the arrow h. It is naturally conceivable that the inner jacket is withdrawn with a tool in one single working step. The inner jacket can also already be removed without difficulty before separation of the fiber jacket in the position according to figure 3.
Figure 6 shows the cable completely stripped of its insulation after the completion of all procedural steps. The individual insulation stripping dimensions a and b as well as the length c of the remaining fiber beard can be adjusted. These dimensions are determined, for example, by the optical connector with which the end portion of the optical cable should be connected.
Figure 7 shows the general construction of a device according to the invention in a highly simplified representation. The individual working stations, which are more closely depicted in figure 8, are constructed next to each other on a table l9. The transport device 23 is suspended with the clamping jaws on a yoke 22 above a bedding strip 24. The individual working stations are arranged linearly along the transport device, whereby each working station is provided with a pneumatic drive element in order to activate the working tool. The transport device is also pneumatically activated, so that obviously numerous pneumatic control elements 20 are required. These are accommodated beneath the surface of the table in a rack 2l and are thus easily accessible at any time. The rack can also accommodate further electrical or electronic control elements. A device, with which the end portion remains firmly fixed and the individual working stations are led to the cable, would be similary constructed.
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Figure 8 shows, Likewise highly simpLi1~ied, a plan view of the device according to figure 7. The individual working stations are arranged ]inearly, whereby a cutting device 8 is provided at the first working station 3] which exhibits cutting blades 16 to cut into and withdraw the outer jacket. At the second working station 32 a separating device 9, with the separating disk 12 and the clamping device 11, which is not shown here, is provided.
~ ' At the third working station 33, the cutting blades 17, for cutting into the inner jacket, æe arranged, and at the fourth working station 34, the moveable heating pads 18 æe fastened with which the inner jacket, which has been cut into, can be withdrawn.
All working t~ols at the individual working stations 31 to 34 can be moved along the guide rods 43 in the direction of the arrow i, coaxially to the optical cable. ~ ;
The individual end portions are brought up to the working stations wi~h a transport device 23, details of which can also be observed in figures 9 and 10. The transport device comprises essentially a conveyor strip 28, which in cross section is shaped approximately like an L-profile. Clamping jaws æe arranged beneath the conveyor strip, each of which exhibits a fixed clamping pad 36 and a moveable clamping pad 37. The clamping pads are rounded into a semi-circle so that they can grasp the optical cable 1. The moveable clamping pads 37 are provided with a holder 45 which protrudes upwæds through an opening 44 in the conveyor st~ip 28. All holders 45 of the individual clamping jaws are connected firmly to a common push rod 30 which, for example, is moveable back and forth, for example with a pneumatic cy]inder 46 in the direction of the arrow k. The push rod 30 is guided in s]ide bearings 35 which are fixed to the conveyor strip 28. Obviously, in this way a~l moveable clamping pads 37 can be simultaneously moved up against the fixed clamping pads 36, respectively away from these.
The conveyor strip 28 is suspended on a vertical feed 26 on which it can be moved upwards and downwards in the direc~on of the arrow 1, ~ . 9 2028~
plane-parallel to the bedding strip 24 arranged beneath. The vertical feed 26 is connected on its side to a horizontal feed 25 on which the entire arrangement can be moved back and orth in the direction o the arrow n. The vertical and horizontal feeds are preferably likewise pneumatically driven. The horizontal feed 25 is fixed to the yoke 22 which extends over the entire length of the bedding strip 24. As a means ~f protection, a bellows 27 is arranged between the fixed side components 47 on the yoke 22 and the hor~Lzontal feed 25.
The optical fiber 1, lying on the bedding strip 24, can be grasped with the aid of the transport device 23, raised, and in one feed cycle once again deposited on the bedding strip 24 next to a following working station. The clamping jaws are all opened together and the conveyor strip 28 returns once again in a reverse cycle in order to transport all cables one station further. In order that the cables remain fixed on the bedding strLp 24 whilst the reverse cycle is being carried out, a pneumatically activated retaining strip 29 is provided which can be moved up and down in the direction of the arrow m, plane-parallel to the bedding strip 24. When a reverse cycle is carried out, the retaining strip 29 is pressed downwards so that all cables introduced into the transport device are clamped firmly onto the bedding strip 24. In order to carry out the conveying cycle, the retaining strip 29 is raised so that the further transport of the cables is not obstructed.
The second working statLon 32, with the separating device 9, is shown somewhat more exactly in figures 11 and 12. Figure 11 shows the optical cable 1 which is fixed onto the bedding strip 24, above the end portion of which the nozzle 10 is arranged. The nozzle 10 is preferably in the form of a sl(*ted nozzle so that all fibers are blown away downwards within a defin~te zone. In this way the fiber jacket comes to lie in a clamping bed 13, which exhibits somewhat V-shaped receptacles. The clamping bed 13 possesses a holding ses~tion 38 within which the fiber jacket can be freely tensioned. A pivoting arm 14 is linked to the bedding strip 24 and can be pivoted pneumatically against the clamping bed 13 in the direction of the arrow o. An additional . -: :
2~2~3745 blowing nozzle 15 is arranged on the free end of the pivot arm 14 so that lightly projecting fibers too can also be pressed into the clamping bed 13. After closing the clamping device, the sepæating disk 12, together with its drive 41, is moved against the holding section 38 in the direc~Dn of the arrow p. In the process of this feed movement a fixed position switch 40 is activated which sets the drive 41 in m~ion.
The separating disk 12 is in this way set into motion only when the fiber jacket has already been held through clamping. In this way unnescessary turbulence is avoided~ After the separation of the fiber jacket, the piv~ng arm 14 is retracted again and the separated fibers are sucked up into a suction nozzle 39 and led away. In this way, the device remains free of contamination. In order to be able to adjust the length of the remaining fiber beard, the separating disk 12 is arranged to be height adjustable in +he direction of the arrow q.
After completion of the separating sequence, the end portion is -transported further to the subsequent working station 33. After the last working procedure in the fourth working station 34, the end portion, stripped of its insulation, is e~ted by the transport device and can be manually removed. Intermediate working stations can perhaps be arranged between the individual working stations, which either remain unequipped or on which likewise certain devices such as, for example blowing nozzles, heaters or spray nozzles can be arranged.
The intermediate stations can also serve to provide an opportunity for visual control.
An alternative embodiment of a de~ice is depicted, highly simpliFi~d, in figures 13 to 16, in which the diffierent working stations alre brought up to the end portions, which are not held in a transporting device.
The end portions are held stationary and the individual working sequences are carried out, whereby the individual working tools æe brought up to the end portion from a rest position. The figures 13 to 15 show side views of the device at different stages of work.
As is depicted in figure 13, the optical cable 1 is held under tension in a stationary point of fixation 4~l, which can, for example, take the ~ , :
, ~0;~8~5 form of clamping jaws. The clamp~ng device l l with the clamping bed 13 is arranged immediately beneath the point of fixation 11. In a similar way to the first working st~tion 31 according to figure 8, the cutting device 8 is arranged to be able to be displaced parallel to the axis of the optical fiber, s]ightly beneath the plane of the point of fixation 48. For reasons of space, the separating disk 12 is arranged opposite the cutting device 8, on the cJther side of the clamping bed 13.
Above the fixed end portion is a further separation device 49 for cutting into and withdrawal of the inner jacket. The nozzle 10 can be pivoted in and out in the direction of the arrow s, as can be seen in figure 16, so that the function of the cutting device 8 is not obstructed .
According to rigure 13, the cutting device has cut into the outer jacket 7 and is now pulled back in the direction of the arrow r so that the outer jacket is removed. The further separation device 49, the nozzle 10, the separating disk 12 and the pivoting arm of the clamping device 11 are in the rest position.
After this working procedure the nozzle 10 is pivcJted down against the optical cable 1 and activated, according to figure 14, so that the fiber jacket is blown downwards onto the clamping bed 13. Now the clamping device is activated, whereby the pivoting arm 14 is pressed against the clamping bed and the fiber jacket is clamped firmly. After the fiber jacket is irmly clamped, the nozzle 10 can be pivclted upwards once again .
Other than in the case of the preceding example, the inner jacket is first withdrawn before the separation of the fiber jacket. This sequence is especi~lly worthy of recom mendation if the remaining fiber beard is to be relatively so long that it could obstruct the separation of the inner jacketO In order to separate the inner jacket, the further separating device 49 is activated, according to figure 15, in that the cutting blade is moved downwards over the end portion in the direction ~. ... i ~ - . -: . : ~ , . . j . ,: , ., ~28~:~
of the arrow t. Cutting into and withdrawal of the inner jacket ensues with the same tool, in that the blade is pulled to the rear in the direction of the arrow u. The rear position is shown in figure 15 by a dotted line. The cutting device 8, is backed off so far that the action of the further cutting procedure is not affected. -In a further working procedure, not further shown here, the separating disk 12, together with its drive, is moved in the direction of the arrow v against the clamped fiber jacket. Subsequently, the end portion can once again be removed from the clamping point 48. The individual working tools can be formed approximately ancaogue to the already previously described embodiment. In particular, adjustment possibiliti~s can be envisaged so that the insulation strioping dimensions a,b and c, according to figure 6, can be adjustable. Guide rods and pneumatic drives can be employed for linear displacement of the individual working tools.
Figure 17 shows the already mentioned alternative possibility for a separation device 9, which can be used to advantage in the device described up until now, in place of the separating disk.
The actual cutting tool comprises the two jaws 50 and 51, which in the case considered are formed as prismatic bodies. The jaw 51 is wedge shaped and has a rounded edge 52. The jaw 50 exhibits a flat surface 53. Both the jaws can be pressed against each other in the direction of the arrow x, whereby, however, only one of the two jaws is made to be moveable. Both the jaws can be held in a conventional toggle lever, or they could also be a component in a device with which the actuation of the jaws ensues through a motor. Naturally, both the jaws are worked in such a precise way that in their closed condition the edge 52, in contact with the jaw 50, is absolutely free of play and cavi~ ies .
An air jet is blown out of the nozzle lO against the exposed fiber jacket in such a way that this is bent to one side away from the axis of the cable, so that it comes to lie between the two jaws 50 and 51..
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The fiber jacket is held firmly in the correct posi~ion with the aid of a clamping device 1l, after which both the jaws can close. The force to apply l;~s in the region of approximately 100 - 150 kg.
Figure 19 shows sche~atically the variation represented in figure 17 with a flat jaw. The wedge shaped jaw has, with that, a radius rl of, for example 0,1 to 0,2mm. The wedge angleot is preferably chosen to be between approximately 60 degrees and 80 degrees. In figure 20, an alternative variation is depicted, with which one jaw exhibits a radius r2 which is larger than the radius rl of the opposite lying jaw.
According to figure l 8, both the jaws have approximately the same radius rl and r2. The jaws could, in cross section, also be asymmetrica~ly formed without difficulty. It would also be conceivable to form the jaws not linearly but as curved bodies so that the cutting edge 52 can be rolled onto the lower jaw.
The procedure carried out with this tocl is designated according to DIN-Norm No. 85 88 also as blade cutting. With that, the wedge shaped jaws have, however, not really a sharp cutting edge, but rather a rounded-off wedge of approximately 0 ,1 to 0, 5m m radius . The wedge angle can lie between approximately 40 degrees and 90 degrees.
It is especially advantageous if the two jaws are made from hard metal, since this material is par~icularly wear resistant. Apart from that, it is important that the jaws are made of a hard material since the separation of the fibers is otherwise not possible. In place of hard met~l a sintered material, or ceramic or hardened steel could be considered .
Surprisingly, it has shown itself that separation of the very tough material of the fiber jacket through wedge cutting between two jaws is particularly juslified. The fibers are with that not sheared-off, but rather parted from one another, whereby a very tidy cutting surface is achieved .
The complexity of the equipment is relatively low and hardly any wear occurs .
-... .
The bending away of the fiber jacket through blowing or suction enables the fiber jacket to be gripped and separated in the s~mplest way. Since the fiber jacket comprises numerous thread-Like hairs, it can be bent away through 90 degrees without difficulty so that the optical fiber with its inner jacket can be completely revealed. The inner jacket has, in comparison to the fiber jacket, a much higher stiffness so that it is not effected by blowing or suction. The bending away of the fiber jacket now permits the use of an effective cutting tool without the need for consideration of the delicate optical fiber. ;
In a protecting way, either before or after the separation of the fiberjacket, the inner jacket can be first cut into and subsequently -withdrawn, if nescessary under the influence of applied heat. The inner jacket could, however, also be removed in another way. It could, for example, be immersed in a solvent and removed in that way.
The fiber jacket can be separated with a separating disk which is displaceable in relation to the cable. The separating disk ensures clean separation of the relatively tough fiber jacket. However, other separating tools would also be conceivable, such as for example an oscillating cutting blade or a shear. It is more advantageous still, however, if the fiber }acket is held between two separating jaws, of ~ ~
which at least one exhibits a wedge shaped cross section and if the -. .:
202~7~S
separating jaws are pressed against each other until the ~er jacket has been completely separated.
The method can be automated in an especially simple way if the end portions are gripped by a transport device and are guided to different working st~tions in sequence, and if respectively one working procedure is carried out at each working station after each feed cycle.
In this way no idle time occurs at the individual working stations, since wiith each cycle each working station is provided with an end portion. The end portions could also be held stationary, whilst different working tools are brought up in sequence and removed again.
With regard to the device, the purpose is fulfilled with a device exhibiting the features of claim 9. The elements of the separating device, namely nozzle, clamping device and separation element, can be realised in very differing ways. Preferably, the clamping device possesses a clamping bed for acceptance of the bent-down fiber jacket and a clamping element which is able to be pressed against the clamping bed. The clamping bed can at the same time exhibit a holding section wIthin which the fiber jacket is able to be freely tensioned when the clamping element is closed, whereby the separating element can be introduced into the holding section. The tensioning of the fiber jacket within the holding section is important to ensure a clean cut.
The individual working steps can ensue at separate working stations, whereby the end portion can be conveyed from one station to another with the aid of a transport device. For this purpose the transport device can exhibit clamping jaws which move back and forth between the working stations and in this way convey the end portions further.
The clamping jaws could, however, also be fixed on an endless conveyer chain which is moved forwards cyclically. In this way the end portions remain fixed in the clamping jaws from the first to the last working station.
A simple and logical grouping of the working stations will arise if these are arranged linearly, and if the clamping jaws are arranged on a 20287~5 mobile conveyer strip. The linear feed does not result in twisting of the cables since the working stations can be arranged relatively close to one another. Apart from that, an operator can monitor all working stations easily. The clamping jaws could be activated simultaneously with a com mon activation element. A rotational feed, for example in which the clamping jaws are arranged on a turntable which rotates past the fixed position working stations, would also, however, be conceivable.
Further advantages and individual features of the invention arise from the following description of embodiments and from the drawings.
Namely:
Fig. I the end portion of an optical cable, Fig. 2 cutting into and withdrawing the outer jacket, Fig. 3 bending away and clamping the fiber jacket, Fig. 4 cutting into the inner jacket, Fig. 5 heating and withdrawing the inner jacket, Fig. 6 the end portion, completely sbipped of its insulation, Fig. 7 a side view of a device according to the invention in a very simplified representation, Fig. 8 a plan view of a device according to the invention with different working stations, Fig. g a longitudinal section through the transport device, ;
Fig . l O a cross section through the transport device according to figure 9, .:: ,. . . . . .
ZOZ8~5 Fig.11 a cross section through the separating device, Fig.12 a plan view of a separating device according to figure 11, Fig.13 an alternative embodiment of the invention with stationary point of fixation when the outer jacket is being removed, Fig.14 the device according to figure 13 when the fiber jacket is being bent away, Fig.15 the device according to figure 14 when the inner jacket is being removed, Fig.16 a front view of the device according to figure 15, Fig.17 an alternative embodiment of a separating device, and Fig.~8 - 20 different types of embodiment of separating jaws on the device according to figure 17.
In figures 1 to 6, an insulation stripping procedure on a greatly enlarged optical cable is schematically represented in the individual working steps. The optical cable 1 comprises the actual optical fiber 2 in the form of a glass fiber, which is protected by different surrounding layers . An inner jacket 3 is arranged im mediately surrounding tne optical fiber which, however, is as a rule built up in two steps and exhibits a so-called core 4 of plastic material and a microcoating 5, for example of silicon. A fiber jacket 6, made of a bundle of very tough fibers of high tensile strength, surrounds the inner jacket 3. This fiber jacket serves to relieve tensile loads in the cable arising from, for example, knocks, kinking etc. The fiber jacket can, for example, be made from glass fiber yarn or aramide (for example KEVLAR, registered trade mark) or from a mixture of these materials.
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The fiber jacket is surrounded by an outer jacket 7 which exhibits a comparatively larger wall thickness and is made from a plastic material.
The optical cable shown has in real;ty an outer diameter of between approximately 2 to 4 mm, whilst the outer cliameter of the inner jacket 3 amounts ~o approximately 0,9mm. The diameter of the optical fiber is less than 0,2mm, which requires extremely careful hand~ing when stripping the insulation.
As can be observed in figure 2, the outer jacket 7 is cut into with the aid of cutting blades 16 down to the fiber jacket and then bent away. This can ensue with a tool which operates within the general principles of stripping pliers, whereby the cutting depth can be adjusted. The withdrawal of the outer jacket 7 ensues coaxially to the -optical fiber, in the direction of the arrow d. With that, either the cutting blades 16 can be moved or the remaining cable can be pulled back from stationary blades.
Figure 3 shows the bending away of the fiber jacket 6 with the aid of a blowing nozzle l0, which directs compressed air, for example, in the direction of the arrow e at approximately rightangles against the optical ~ ~ -cable 1. The fiber jacket can thus be held in a clamping device ll.
The clamping device exhibits a clamping bed 13 which serves as an ~`
opposing bed for a clamping element, for example in the form af a swivel arm 14. After the fiber jacket 6 has been held firmly, a separating element, such as, for example, a separating disk 12, is mo~ed against the fiber jacket in the direction of the arrow f. The ;~
separating disk rc~tates in the direction of the arrow g ~i h a relatively high rotational speed, so that a clean cut is ensured. The clamping device 11 and the separating disk 12 are components of a separating device 9, which could, however, also exhibit other elements. The separating disk could also approach the fiber jacket from the cJther side.
Figure 4 shows the inner jacket 3, which has been freed from the outer jacket and the Eiber jacket. Of the fiber jacket 6, only a short 2~ 5 beard remains visible which does not, however, disturb subsequent working. Now the inner jacket 3 is cut into down as far as the microcoating with the aid of a cutting blade 17.
The detachment of the inner jacke~ requires extreme care and for this reason ensues in a separate working sequence according to figure 5.
The inner jacket 3, which has already been cut into, is grasped by heating pads 18 and withdrawn in the direction of the arrow h. It is naturally conceivable that the inner jacket is withdrawn with a tool in one single working step. The inner jacket can also already be removed without difficulty before separation of the fiber jacket in the position according to figure 3.
Figure 6 shows the cable completely stripped of its insulation after the completion of all procedural steps. The individual insulation stripping dimensions a and b as well as the length c of the remaining fiber beard can be adjusted. These dimensions are determined, for example, by the optical connector with which the end portion of the optical cable should be connected.
Figure 7 shows the general construction of a device according to the invention in a highly simplified representation. The individual working stations, which are more closely depicted in figure 8, are constructed next to each other on a table l9. The transport device 23 is suspended with the clamping jaws on a yoke 22 above a bedding strip 24. The individual working stations are arranged linearly along the transport device, whereby each working station is provided with a pneumatic drive element in order to activate the working tool. The transport device is also pneumatically activated, so that obviously numerous pneumatic control elements 20 are required. These are accommodated beneath the surface of the table in a rack 2l and are thus easily accessible at any time. The rack can also accommodate further electrical or electronic control elements. A device, with which the end portion remains firmly fixed and the individual working stations are led to the cable, would be similary constructed.
" ...
~ . .
' ` '':' ~, '~, ' , .
2~7~
Figure 8 shows, Likewise highly simpLi1~ied, a plan view of the device according to figure 7. The individual working stations are arranged ]inearly, whereby a cutting device 8 is provided at the first working station 3] which exhibits cutting blades 16 to cut into and withdraw the outer jacket. At the second working station 32 a separating device 9, with the separating disk 12 and the clamping device 11, which is not shown here, is provided.
~ ' At the third working station 33, the cutting blades 17, for cutting into the inner jacket, æe arranged, and at the fourth working station 34, the moveable heating pads 18 æe fastened with which the inner jacket, which has been cut into, can be withdrawn.
All working t~ols at the individual working stations 31 to 34 can be moved along the guide rods 43 in the direction of the arrow i, coaxially to the optical cable. ~ ;
The individual end portions are brought up to the working stations wi~h a transport device 23, details of which can also be observed in figures 9 and 10. The transport device comprises essentially a conveyor strip 28, which in cross section is shaped approximately like an L-profile. Clamping jaws æe arranged beneath the conveyor strip, each of which exhibits a fixed clamping pad 36 and a moveable clamping pad 37. The clamping pads are rounded into a semi-circle so that they can grasp the optical cable 1. The moveable clamping pads 37 are provided with a holder 45 which protrudes upwæds through an opening 44 in the conveyor st~ip 28. All holders 45 of the individual clamping jaws are connected firmly to a common push rod 30 which, for example, is moveable back and forth, for example with a pneumatic cy]inder 46 in the direction of the arrow k. The push rod 30 is guided in s]ide bearings 35 which are fixed to the conveyor strip 28. Obviously, in this way a~l moveable clamping pads 37 can be simultaneously moved up against the fixed clamping pads 36, respectively away from these.
The conveyor strip 28 is suspended on a vertical feed 26 on which it can be moved upwards and downwards in the direc~on of the arrow 1, ~ . 9 2028~
plane-parallel to the bedding strip 24 arranged beneath. The vertical feed 26 is connected on its side to a horizontal feed 25 on which the entire arrangement can be moved back and orth in the direction o the arrow n. The vertical and horizontal feeds are preferably likewise pneumatically driven. The horizontal feed 25 is fixed to the yoke 22 which extends over the entire length of the bedding strip 24. As a means ~f protection, a bellows 27 is arranged between the fixed side components 47 on the yoke 22 and the hor~Lzontal feed 25.
The optical fiber 1, lying on the bedding strip 24, can be grasped with the aid of the transport device 23, raised, and in one feed cycle once again deposited on the bedding strip 24 next to a following working station. The clamping jaws are all opened together and the conveyor strip 28 returns once again in a reverse cycle in order to transport all cables one station further. In order that the cables remain fixed on the bedding strLp 24 whilst the reverse cycle is being carried out, a pneumatically activated retaining strip 29 is provided which can be moved up and down in the direction of the arrow m, plane-parallel to the bedding strip 24. When a reverse cycle is carried out, the retaining strip 29 is pressed downwards so that all cables introduced into the transport device are clamped firmly onto the bedding strip 24. In order to carry out the conveying cycle, the retaining strip 29 is raised so that the further transport of the cables is not obstructed.
The second working statLon 32, with the separating device 9, is shown somewhat more exactly in figures 11 and 12. Figure 11 shows the optical cable 1 which is fixed onto the bedding strip 24, above the end portion of which the nozzle 10 is arranged. The nozzle 10 is preferably in the form of a sl(*ted nozzle so that all fibers are blown away downwards within a defin~te zone. In this way the fiber jacket comes to lie in a clamping bed 13, which exhibits somewhat V-shaped receptacles. The clamping bed 13 possesses a holding ses~tion 38 within which the fiber jacket can be freely tensioned. A pivoting arm 14 is linked to the bedding strip 24 and can be pivoted pneumatically against the clamping bed 13 in the direction of the arrow o. An additional . -: :
2~2~3745 blowing nozzle 15 is arranged on the free end of the pivot arm 14 so that lightly projecting fibers too can also be pressed into the clamping bed 13. After closing the clamping device, the sepæating disk 12, together with its drive 41, is moved against the holding section 38 in the direc~Dn of the arrow p. In the process of this feed movement a fixed position switch 40 is activated which sets the drive 41 in m~ion.
The separating disk 12 is in this way set into motion only when the fiber jacket has already been held through clamping. In this way unnescessary turbulence is avoided~ After the separation of the fiber jacket, the piv~ng arm 14 is retracted again and the separated fibers are sucked up into a suction nozzle 39 and led away. In this way, the device remains free of contamination. In order to be able to adjust the length of the remaining fiber beard, the separating disk 12 is arranged to be height adjustable in +he direction of the arrow q.
After completion of the separating sequence, the end portion is -transported further to the subsequent working station 33. After the last working procedure in the fourth working station 34, the end portion, stripped of its insulation, is e~ted by the transport device and can be manually removed. Intermediate working stations can perhaps be arranged between the individual working stations, which either remain unequipped or on which likewise certain devices such as, for example blowing nozzles, heaters or spray nozzles can be arranged.
The intermediate stations can also serve to provide an opportunity for visual control.
An alternative embodiment of a de~ice is depicted, highly simpliFi~d, in figures 13 to 16, in which the diffierent working stations alre brought up to the end portions, which are not held in a transporting device.
The end portions are held stationary and the individual working sequences are carried out, whereby the individual working tools æe brought up to the end portion from a rest position. The figures 13 to 15 show side views of the device at different stages of work.
As is depicted in figure 13, the optical cable 1 is held under tension in a stationary point of fixation 4~l, which can, for example, take the ~ , :
, ~0;~8~5 form of clamping jaws. The clamp~ng device l l with the clamping bed 13 is arranged immediately beneath the point of fixation 11. In a similar way to the first working st~tion 31 according to figure 8, the cutting device 8 is arranged to be able to be displaced parallel to the axis of the optical fiber, s]ightly beneath the plane of the point of fixation 48. For reasons of space, the separating disk 12 is arranged opposite the cutting device 8, on the cJther side of the clamping bed 13.
Above the fixed end portion is a further separation device 49 for cutting into and withdrawal of the inner jacket. The nozzle 10 can be pivoted in and out in the direction of the arrow s, as can be seen in figure 16, so that the function of the cutting device 8 is not obstructed .
According to rigure 13, the cutting device has cut into the outer jacket 7 and is now pulled back in the direction of the arrow r so that the outer jacket is removed. The further separation device 49, the nozzle 10, the separating disk 12 and the pivoting arm of the clamping device 11 are in the rest position.
After this working procedure the nozzle 10 is pivcJted down against the optical cable 1 and activated, according to figure 14, so that the fiber jacket is blown downwards onto the clamping bed 13. Now the clamping device is activated, whereby the pivoting arm 14 is pressed against the clamping bed and the fiber jacket is clamped firmly. After the fiber jacket is irmly clamped, the nozzle 10 can be pivclted upwards once again .
Other than in the case of the preceding example, the inner jacket is first withdrawn before the separation of the fiber jacket. This sequence is especi~lly worthy of recom mendation if the remaining fiber beard is to be relatively so long that it could obstruct the separation of the inner jacketO In order to separate the inner jacket, the further separating device 49 is activated, according to figure 15, in that the cutting blade is moved downwards over the end portion in the direction ~. ... i ~ - . -: . : ~ , . . j . ,: , ., ~28~:~
of the arrow t. Cutting into and withdrawal of the inner jacket ensues with the same tool, in that the blade is pulled to the rear in the direction of the arrow u. The rear position is shown in figure 15 by a dotted line. The cutting device 8, is backed off so far that the action of the further cutting procedure is not affected. -In a further working procedure, not further shown here, the separating disk 12, together with its drive, is moved in the direction of the arrow v against the clamped fiber jacket. Subsequently, the end portion can once again be removed from the clamping point 48. The individual working tools can be formed approximately ancaogue to the already previously described embodiment. In particular, adjustment possibiliti~s can be envisaged so that the insulation strioping dimensions a,b and c, according to figure 6, can be adjustable. Guide rods and pneumatic drives can be employed for linear displacement of the individual working tools.
Figure 17 shows the already mentioned alternative possibility for a separation device 9, which can be used to advantage in the device described up until now, in place of the separating disk.
The actual cutting tool comprises the two jaws 50 and 51, which in the case considered are formed as prismatic bodies. The jaw 51 is wedge shaped and has a rounded edge 52. The jaw 50 exhibits a flat surface 53. Both the jaws can be pressed against each other in the direction of the arrow x, whereby, however, only one of the two jaws is made to be moveable. Both the jaws can be held in a conventional toggle lever, or they could also be a component in a device with which the actuation of the jaws ensues through a motor. Naturally, both the jaws are worked in such a precise way that in their closed condition the edge 52, in contact with the jaw 50, is absolutely free of play and cavi~ ies .
An air jet is blown out of the nozzle lO against the exposed fiber jacket in such a way that this is bent to one side away from the axis of the cable, so that it comes to lie between the two jaws 50 and 51..
'"'~.
: : :
~ ~ `
;~OZ87~S
The fiber jacket is held firmly in the correct posi~ion with the aid of a clamping device 1l, after which both the jaws can close. The force to apply l;~s in the region of approximately 100 - 150 kg.
Figure 19 shows sche~atically the variation represented in figure 17 with a flat jaw. The wedge shaped jaw has, with that, a radius rl of, for example 0,1 to 0,2mm. The wedge angleot is preferably chosen to be between approximately 60 degrees and 80 degrees. In figure 20, an alternative variation is depicted, with which one jaw exhibits a radius r2 which is larger than the radius rl of the opposite lying jaw.
According to figure l 8, both the jaws have approximately the same radius rl and r2. The jaws could, in cross section, also be asymmetrica~ly formed without difficulty. It would also be conceivable to form the jaws not linearly but as curved bodies so that the cutting edge 52 can be rolled onto the lower jaw.
The procedure carried out with this tocl is designated according to DIN-Norm No. 85 88 also as blade cutting. With that, the wedge shaped jaws have, however, not really a sharp cutting edge, but rather a rounded-off wedge of approximately 0 ,1 to 0, 5m m radius . The wedge angle can lie between approximately 40 degrees and 90 degrees.
It is especially advantageous if the two jaws are made from hard metal, since this material is par~icularly wear resistant. Apart from that, it is important that the jaws are made of a hard material since the separation of the fibers is otherwise not possible. In place of hard met~l a sintered material, or ceramic or hardened steel could be considered .
Surprisingly, it has shown itself that separation of the very tough material of the fiber jacket through wedge cutting between two jaws is particularly juslified. The fibers are with that not sheared-off, but rather parted from one another, whereby a very tidy cutting surface is achieved .
The complexity of the equipment is relatively low and hardly any wear occurs .
-... .
Claims (21)
1. Method of stripping the insulation from the end portion of optical cables (1) comprising an optical fiber (2) which is surrounded by an inner jacket (3), an outer jacket (7) lying upon it and a fiber jacket (6) lying between the inner jacket and the outer jacket, characterized in that - firstly the outer jacket (7) is cut into and withdrawn, - the revealed fiber jacket (6) is bent away to one side through blowing and/or suction, - the fiber jacket (6) is then separated.
2. Method according to claim 1, characterized in that the fiber jacket is grasped and held in a clamping device (11) after being bent away.
3. Method according to claim 2, characterized in that the fiber jacket is separated with a separating disk (12) which is displaceable relative to the cable (1) .
4. Method according to claim 1 or 2, characterized in that the fiber jacket is held between two jaws, of which at least one jaw exhibits a somewhat wedge shaped form, and that the jaws are pressed against each other until the fiber jacket is completely separated.
5. Method according to one of the claims 1. to 4, characterized in that the inner jacket is cut into before or after the separation of the fiber jacket and is subsequently withdrawn, if nescesssry under the influence of heat.
6. Method according to claim 5, characterized in that the end portions are grasped by a transport device (23) and are led in sequence to different working stations (31 to 34), and that respectively one working procedure is carried out at each working station after each feed cycle.
7. Method according to claim 6, characterized in that the end portions are grasped by clamping jaws and are led to the individual working stations.
8. Method according to claim 5, characterized in that the end portions are fixed firmly in a working station and that different working tools, which in each case carry out one working procedure, are brought in sequence up to the end portion.
9. Device for stripping the insulation from the end portions of optical cables comprising an optical fiber (2) which is surrounded by an inner jacket (3), an outer jacket (7) lying upon it and a fiber jacket (6) lying between the inner jacket and the outer jacket, with a cutting device ( 8) for cutting into and withdrawal of at least the outer jacket (7), characterized in that a separating device (9) for separation of the fiber jacket (6), exhibiting a nozzle (10) directed against the fiber jacket to blow or suck the fiber jacket, a clamping device (11) to grasp the fiber jacket and a separating element (12) to separate the fiber jacket, is arranged either at or after the cutting device (8).
10. Device according to claim 9, characterized in that the clamping device exhibits a clamping bed (13) to accommodate the bent-away fiber jacket (6) and a clamping element (14) which is able to be pressed against the clamping bed.
11. Device according to claim 10, characterized in that the clamping element is a pivoting arm (14), the free end of which engages with the clamping bed ( 13) and carries an additional blowing nozzle (15) .
12. Device according to claims 10 or 11, characterized in that the clamping bed (13) exhibits a holding section (38) within which the fiber jacket (6) is able to be freely tensioned when the clamping element is closed and that the separating element (12) can be introduced into the holding section.
13. Device according to one of the claims 9 to 12, characterized in that the separating element is a separating disk (12) which is able to be rotationally driven and which is mounted in bearings to be displaceable relative to the clamping device (11).
14. Device according to one of the claims 9 to 12, characterized in that the separating element exhibits two jaws which can be pressed against each another, of which at least one exhibits a somewhat wedge shaped cross section.
15. Device according to claim 14, characterized in that one of the jaws exhibits a flat surface against which a wedge shaped jaw is able to be pressed.
16. Device according to one of the claims 9 to 15, characterized in that the cutting device (8) and the separating device (9) are separate working stations (31, 32) and that at least one further working station is provided for removal of the inner jacket (3), whereby the end portions are able to be led in sequence to the individual working stations with a transport device (23).
17. Device according to claim 16, characterized in that the transport device (23) exhibits clamping jaws (36, 37), which are able to be moved back and forth with a feed cycle and a reversing cycle between the working stations, to grasp the end portions.
18. Device according to claim 16, characterized in that the transport device exhibits clamping jaws to grasp the end portions, which are able to be cyclically led past each working station.
19. Device according to one of the claims 9 to 15, characterized in that a permanent point of fixation for fixing of an end portion is arranged in the region of the separating device and that the cutting device and at least one further tool for removal of the inner jacket is mounted moveably on bearings in such a way that it is able to be led out of a rest position into a working position at the point of fixation.
20. Device according to claim 19, characterized in that the nozzle for blowing or suction of the fiber jacket is mounted in bearings to pivot.
21. Device according to one of the claims 16 to 20, characterized in that the working stations, respectively the working tools, are arranged on a table (19) and are able to be pneumatically activated, and that the pneumatic control elements (20) are arranged in a rack ( 21) beneath the surface of the table.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH404489 | 1989-11-09 | ||
| CH4044/89 | 1989-11-09 | ||
| CH3148/90A CH682434A5 (en) | 1990-10-01 | 1990-10-01 | Fibrous lining removal from sheathed optical cable end |
| CH3148/90 | 1990-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2028745A1 true CA2028745A1 (en) | 1991-05-10 |
Family
ID=25692310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002028745A Abandoned CA2028745A1 (en) | 1989-11-09 | 1990-10-29 | Method and device for stripping the insulation from the end portions of optical cables |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0430868A1 (en) |
| JP (1) | JPH03179302A (en) |
| AU (1) | AU6588190A (en) |
| CA (1) | CA2028745A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777276A (en) * | 2012-10-19 | 2014-05-07 | 泰科电子(上海)有限公司 | System and method for stripping optical cable |
| CN112838463A (en) * | 2021-01-09 | 2021-05-25 | 台州腾标电子有限公司 | Cable desquamation equipment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2531169Y2 (en) * | 1991-11-25 | 1997-04-02 | 住友電気工業株式会社 | Stripping equipment for coated wire |
| CH683655A5 (en) * | 1991-11-12 | 1994-04-15 | Jiri Stepan | Method and device for severing a cable jacket of fibers. |
| DE19736077A1 (en) * | 1997-08-20 | 1999-03-04 | Bosch Gmbh Robert | Stripping device for optical fiber |
| DE19941627C1 (en) * | 1999-09-01 | 2001-08-02 | Fraunhofer Ges Forschung | Method and device for automatically removing the core from multi-core electrical cables stripped at one end |
| DE102005024683B4 (en) * | 2005-05-30 | 2011-02-03 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Method of preparing a cable end for mounting a connector |
| US8640329B2 (en) * | 2008-09-03 | 2014-02-04 | Adc Telecommunications, Inc. | Hybrid fiber/copper cable preparation tool |
| CN113451946B (en) * | 2021-08-03 | 2023-01-24 | 广东电网有限责任公司 | Full-automatic cable joint manufacturing tool |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768143A (en) * | 1971-07-26 | 1973-10-30 | R Holmes | Method and apparatus for stripping electrical cable ends |
| BR7904862A (en) * | 1979-07-26 | 1981-01-27 | Brasilia Telecom | TOOL FOR CUTTING AND CLIPPING OF FIBER OPTICS |
| JPS60108803A (en) * | 1983-11-18 | 1985-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Terminal forming device of optical fiber |
| DE3406917A1 (en) * | 1984-02-25 | 1985-09-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | DEVICE FOR DETACHING THE COATING APPLIED ON THE FIBER OF FIBERGLASS |
| GB2207255B (en) * | 1987-07-18 | 1991-03-20 | Stc Plc | Removing optical fibre encapsulation with a heated gas jet |
| DE3735282A1 (en) * | 1987-10-17 | 1989-04-27 | Statomat Globe Maschf | Method and device for removing cable threads during unsheathing of cable ends and device for carrying out the method |
-
1990
- 1990-10-29 EP EP90810826A patent/EP0430868A1/en not_active Withdrawn
- 1990-10-29 CA CA002028745A patent/CA2028745A1/en not_active Abandoned
- 1990-11-08 AU AU65881/90A patent/AU6588190A/en not_active Abandoned
- 1990-11-09 JP JP2305941A patent/JPH03179302A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777276A (en) * | 2012-10-19 | 2014-05-07 | 泰科电子(上海)有限公司 | System and method for stripping optical cable |
| CN112838463A (en) * | 2021-01-09 | 2021-05-25 | 台州腾标电子有限公司 | Cable desquamation equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03179302A (en) | 1991-08-05 |
| AU6588190A (en) | 1991-05-16 |
| EP0430868A1 (en) | 1991-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19930429 |