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Title:
DEVICE AND METHOD FOR FOLDING BACK THE BRAIDED SHIELDING BRAIDING OF A CABLE
Document Type and Number:
WIPO Patent Application WO/2008/062375
Kind Code:
A2
Abstract:
A device for folding back and/or expanding a shielding braiding (9) of a cable (6), comprising at least two, preferably electronically controlled, motor-actuated processing jaws (3) which are mounted displaceably on the device, characterised in that the position of the processing jaws (3) can be freely selected or programmed depending on the time or the desired processing steps so that the processing jaws (3) can be brought into arbitrary positions and can expand and fold back a shielding braiding (9) by specifically pressing the processing jaws, by knocking, by sliding or pushing and stroking, wherein preferably one motor-actuated first clamping device comprising at least two clamping jaws (2) securely holds the cable (6) to be processed, wherein different radial positions of the processing jaws (3) within a certain diameter range correspond to different cable diameters which are embraced as completely as possible by the retaining surfaces (33).

Inventors:
LUDWIG ADRIAN (CH)
GUENTER STEPHANE (CH)
STALLER RENE (CH)
Application Number:
PCT/IB2007/054750
Publication Date:
May 29, 2008
Filing Date:
November 22, 2007
Export Citation:
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Assignee:
SCHLEUNIGER HOLDING AG (CH)
LUDWIG ADRIAN (CH)
GUENTER STEPHANE (CH)
STALLER RENE (CH)
International Classes:
H02G1/12
Foreign References:
JP2002238125A2002-08-23
US20050076500A12005-04-14
US2929285A1960-03-22
JP2000102133A2000-04-07
JP2002101515A2002-04-05
JP2000032626A2000-01-28
US20050181672A12005-08-18
Attorney, Agent or Firm:
ROSENICH, Paul (Patentbüro Paul Rosenich AGBGZ, Triesenberg, LI)
Download PDF:
Claims:

CLAIMS

1. A device for folding back or inverting and/or expanding a shielding layer or a shielding braiding (9) of a cable (6), for example, a coaxial cable or another shielded (e.g. multi- conductor) cable comprising at least two, preferably electronically controlled, motor- actuated processing jaws (3) which are mounted displaceably, pivotally and/or rotatably on the device, which can be brought into certain positions relative to the cable (6) to be processed in the longitudinal direction of the cable and in a plane radially to the cable (6) and/or along concentric conical spatial surfaces or the like around the cable (6), characterised in that the position of the processing jaws (3) can be freely selected or (arbitrarily) programmed depending on the time or the desired processing steps so that the processing jaws (3) can be brought into arbitrary positions taking into account the cable properties and the condition of the cable end and can expand and fold back or invert a shielding or a shielding braiding (9) by specifically pressing the processing jaws, by knocking (multiple times, pressing at short time intervals), by sliding or pushing and stroking, wherein preferably one, likewise electronically controlled, motor-actuated first clamping device comprising at least two clamping jaws (2) securely holds the cable (6) to be processed in the operating state after insertion in the device and wherein the processing jaws (3) are configured at their inner retaining surfaces (33) in such a manner that different radial positions of the processing jaws (3) within a certain diameter range correspond to different cable diameters

which are embraced as completely as possible by the retaining surfaces (33) .

2. The device according to claim 1, characterised in that the device according to the invention is integrated, allocated or placed aside, an optionally conventional cable stripping or stripping device which process the cable end to be processed in the operating state before insertion into the device or before the folding back or inversion and/or expansion such that at least the shielding (9) at the cable end has been exposed by a preceding stripping process.

3. The device according to claim 1 or 2, characterised in that a motor-actuated inner second clamping device (4) is provided on the device side, associated with the free cable end, which can be driven such that at the same time as, or alternatively to, the first clamping device

(2), it holds the cable (6) to be processed in the inverted or expanded state in its axial/radial position relative to the device, wherein the inner second clamping device (4) can preferably be displaced in the longitudinal direction of the cable (6), optionally in an electronically controlled or programmable manner, and wherein the clamping jaws (4) are preferably freely selectable from a set of different clamping jaws (4) with different clamping geometry and can be exchanged.

4. The device according to any one of the preceding claims, characterised in that the processing jaws

(3) are configured as exchangeable in pairs, preferably by means of a quick fastening, so that the geometry, the surface condition and the material of the processing jaws (3) can be freely

selected from a set of different processing jaws (3) and the processing jaws can be suitable matched to the cable type and the cable diameter range .

5. The device according to any one of the preceding claims, characterised in that the processing jaws

(3) and/or the clamping jaws (4) of the inner second clamping device and/or the clamping jaws (2) of the first clamping device are preferably actuated by electric motor, electromagnetically or pneumatically and/or the clamping jaws of the first clamping device are configured as prismatic clamping jaws (2) for covering large ranges of cable diameters.

6. The device according to any one of the preceding claims, characterised in that the clamping jaws

(4) of the inner second clamping device are provided as drivable alternatively to only two positions (open, closed) or can be driven so that all the radial positions between a completely closed and a completely open position can be obtained.

7. The device according to any one of the preceding claims, characterised in that the movement of the processing jaws (3) and the first clamping jaws

(4) of the inner second clamping device can be driven successively (sequentially or clocked) or simultaneously (in parallel) and/or that the device comprises a programmable controller which comprises the following programmable or preprogrammed process steps which can be retrieved by operating staff: a) clamping the first clamping jaws (2) and upwardly compressing the shielding braiding

(9) to form a compression disk (12) by axial and or radial gripping of the shielding braiding (9) in the area of the free cable end by means of the processing jaws (3) ; b) opening the processing jaws (3) and gripping or going around the compression disk (12) in the area of the cable (6) facing away from the free end of the cable; c) partially closing the processing jaws (3) and sweeping over the compression disk (12) in the direction of the free cable end; d) optionally further partial closure of the processing jaws in the area of the free cable end removed from the shielding braiding (9) or shielding funnel (13); e) axially pushing back the shielding braiding (9) from the free cable end and thereby creating a shielding disk (14) in the area of the free front side of the sheath (8); f) optionally partially opening the processing jaws (3) ; g) sweeping over the shielding disk (14) by further axial displacement of the processing jaws (3) from the free cable end; h) optionally reciprocal pressing of the shielding funnel (15) formed by g) onto the sheath (8) ; i) opening the processing jaws (3) and releasing the cable (6) by the clamping jaws (2, 4); wherein the program is configured so that these process steps can be retrieved and processed sequentially or independently of one another, and wherein preferably the electronic controller is allocated an input interface in which at least some of the above process steps relating to the axial and radial jaw positions and relating to the program sequence can be freely programmed.

8. The device according to any one of the preceding claims, characterised in that the processing jaws (3) and/or the clamping jaws (4) of the inner second clamping device are designed as spring- loaded, wherein the spring loading is implemented by conventional springs or by pneumatic spring loading and a clearly defined radial force can thereby be exerted on the cable and its components.

9. The device according to any one of the preceding claims, characterised in that the inner clamping jaws (4) of the inner second clamping device and/or the main clamping jaws (2) can be exchanged and/or that the processing jaws (3), the main (2) and/or inner clamping jaws (4) are held on linear guides (28) or on pivot arms (22) .

10. A method for inverting a shielding braiding (9) of a cable (6) in the area in which the sheath (8) has been removed and in which the shielding braiding (9) located under the removed sheath piece is to be processed, in which the shielding braiding (9) is raised from the underlying cable layer, e.g. from an underlying dielectric (10), and is positioned vertically to form a shielding disk (14) before this shielding disk (14) is bent over by jaws (3), sleeves or the like onto the top of the sheath (8) remaining on the cable (6), characterised in that the shielding disk (14) is positioned vertically or formed in such a manner that the original braiding structure of the shielding braiding (9) is as far as possible unchanged and that the braiding structure of the shielding braiding (9) is retained during the inversion process so that when a cable (6) having

an inverted shielding braiding (9) according to the invention is removed, this lies in the form of a shielding funnel (15) having an approximately unchanged braiding structure over the sheath (8) which has not been removed.

11. The method according to claim 10, characterised in that during the vertical positioning of the shielding disk (14) at its free end, the cable (6) is preferably held by an inner clamping device (4) .

12. The method according to claim 10 or 11, characterised in that the cable (6) is held at its sleeve (8) preferably by a clamping device (2) .

13. The method according to any one of claims 10 to 12, characterised in that the process for pushing the shielding braiding (9) towards the shielding disk (14) takes place as follows: pushing the shielding braiding from the free end of the cable (6) in the direction of the cable sheath (8) remaining on the cable (6) so that a compression disk (12) is formed from the shielding braiding (9) in the area of its transition from the shielding braiding (9) to the front of the sheath (8); the compression disk (12) is then converted into a first shielding funnel (13) by sweeping over the same in the direction of the free cable end, the funnel opening whereof points towards the free cable end; thus forming a shielding disk (14) instead of the compression disk (12) by renewed pushing of the shielding braiding from the free end of the cable (6) .

14. The method according to claim 13, characterised in that by renewed or further pushing of the

shielding braiding (9) or the shielding disk (14) from the free end of the cable (6) in the direction of the cable sheath (8) located on the cable (6), this time however, beyond the front of the cable sheath (8), the shielding braiding (9) is inverted or folded back in the form of a second shielding funnel (15) over the free end of the cable sheath (8) .

15. The method according to claim 14, characterised in that after the shielding braiding (9) has been folded back to form the second shielding funnel (15), this is pressed onto the outside of the cable sheath (8), wherein this pressing is preferably carried out by "knocking", i.e. the second shielding funnel (15) is pressed multiple times (reciprocally) in the direction of the outside of the cable sheath (8) or by "sweeping thereover", i.e. by sweeping once or many times over the second shielding funnel (15) in the direction of the first clamping device (2) .

16. The method according to any one of claims 10 to 14, characterised in that the pushing, sweeping and/or pressing of the shielding braiding (9) is carried out by means of processing jaws (3) which can be displaced longitudinally and transversely in relation to the cable (6) and can push, sweep back and press the shielding braiding (9) according to the method, wherein the processing jaws are preferably selected from a series of processing jaws and used for certain diameter ranges of certain cables (6), by bringing the jaws towards one another in different radial positions, depending on the diameter of the cable (6) to be processed within the processing range.

17. The method according to any one of claims 10 to

16, characterised in that the clamping devices (2, 4) are pressed onto the cable (6) by means of a clearly defined radial spring force in order in this way to keep the pressing force to a defined value which is gentle on the cable but secure.

18. The method according to any one of claims 10 to

17, characterised in that the processing jaws (3), first clamping jaws (2) of the first clamping device and/or second clamping jaws (4) of the inner clamping device are fed linearly or on an arc in relation to the cable or removed.

Description:

DEVICE AND METHOD FOR EXPANDING AND FOLDING BACK THE

SHIELDING BRAIDING OF A CABLE, IN PARTICULAR A COAXIAL

CABLE OR ANOTHER SHIELDED CABLE

The invention relates to a device and a method for expanding and folding back a shielding braiding of a shielded cable, in particular a coaxial cable. This device can be an accessory or component of a stripping machine. The method described here or parts thereof can also be applied by means of a suitable controller to existing stripping machines on the device according to the invention but also to other new devices.

Reference is made to the preamble of claim 1 and to the preamble of claim 10. Devices or stripping machines according to the preamble of claim 1 are known, particularly as stripping machines for stranded cable or coaxial cable, such as the Schleuniger Unistrip US 2600 semiautomatic stripper for stranded cable. Expressly not excluded by the preamble, however, are fully automatic machines and cut-and-strip machines (machines for the automatic cutting, incision and stripping of continuous cables) such as, for example, the Schleuniger Powerstrip 9500 which allows continuous processing of a cable. The invention is therefore also not restricted to so-called table machines which can be placed on a table and are fundamentally not incorporated in automatic processing lines but where cable ends are inserted by hand and removed again. Optionally, insertion and removal by hand can also be executed in the device according to the invention by a robot arm or the like. The reason for this information on the field of application of the invention is that the semi-automatic and automatic continuously operating cut-and-strip machines have been increasingly subjected to a technological separation over the past few years and now constitute completely different types of

machines, both in terms of application and in terms of structure. The technologies have consequently separated and are thus considered independently of one another by the person skilled in the art. However, the present invention can be used expressly or applied advantageously to both types of machine. This is particularly the case in a production line which comprises a plurality of electronically controlled different cable processing machines.

Known stripping machines or devices for processing a shielding braiding do not function optimally. For example, operators must regularly execute manual measures to bring the shielding braiding into the correct position. The shielding braiding is separated in various known devices so that the strands of the braiding are brought from the braided state in a loose or undefined free state. This leads to unfavourable possibilities for contact in the following processing steps and can lead to defects during automatic further processing of the cable. In the case of unbraided strands, it can also happen that as soon as these are bent over, some are missed out during bending over and thus individual strands remain unbent. These unbent strands can lead to rejects during the following further processing (contacting, plug assembly etc.).

An example of a known device which can have these disadvantages is disclosed in JP2000032626A. Described therein is a method in which an existing wire braiding is disentangled by means of rotating claws (3) until the strands are present in isolated (disintegrated) form. In this known method, the strands thus unbraided then project radially from the cable approximately in the form of a shielding or strand plate. In this state, the strands are bent in the axial direction of the cable and away from the free end of the cable by a pair

of claws, which enclose a sleeve-like hole when closed, so that the strands come to lie in a bent-over position. This bending-over process takes place so that the closed claws and therefore the hole are pushed away from the free end of the cable axially over the cable. The predefined and non-variable hole is thereby precisely adapted to the outside diameter of the cable sheath. The claws therefore grasp the strands which have been previously set up to form a shielding disk and bend these around onto the sheath surface accompanied by further axial displacement. The claws then open and expose the cable with the bent-over strands. This process can be seen from Fig. 2 of JP2000032626A.

It is thus the object of the invention to provide a device and a method whereby a shielding braiding can be folded back largely without varying the woven structure. This should have the result that the electrical connection to the plug or socket housing is optimal. As a result of the optimised homogeneous possibility of contact between the shielding braiding and the plug or socket over the entire circumference, at least the following advantageous electrical properties should be obtained in consequence:

• As a result of the homogeneous distribution of the individual strands (as far as possible in their woven structure) over the entire circumference, the impedance transition is optimised, i.e. good reflection values can also be achieved in the area of the transition from the cable to the plug or to the socket.

• If the openings in the shielding braiding in the area of the plug or socket are as far as possible no greater than the mesh width of the original braiding, optimum EMC tightness can be achieved.

• As a result of the homogeneous distribution of the individual strands over the entire circumference, this should favour the following operations such as pressing, crimping etc. Inter alia, this should also favour the gas-tightness of the connection which in turn would have the result that no corrosion occurs which for its part could negatively influence the electrical properties.

As another important object which should be achieved at the same time as the aforesaid object but independently thereof, the invention should provide a device for expanding and folding back the shielding braiding of a cable, in particular a coaxial cable or another shielded cable which allows problem-free adaptation of the device and the method to different types of cable and cable dimensions. On the other hand, the device should be flexible within the scope of certain cable dimensions, i.e. it should be possible to work without changing tools in a certain diameter framework. At the same time, the universal nature of the device should be so flexible that it is possibly also in a position to remove the shielding braiding merely from the dielectric or from the intermediate insulation without inverting the shielding braiding so that, for example, a sleeve can be inserted subsequently between the dielectric and shielding braiding. In a simple case of application of such a sleeve, the shielding strands therefore need not be inverted backwards. Hence, the device according to the invention should also be programmable and be able to execute partial steps of an inversion process. As a result, it should be possible in particular to achieve good integrability in a cable processing line so that even in the case of more complex installations (a plurality of cable processing work steps one after the other) , the device according

to the invention can optionally be used with the method according to the invention.

These objects are achieved by the device according to claim 1 or by the method according to claim 10. Thus, a freely programmable stripping machine or device for expanding and folding back the shielding braiding of a cable, in particular a coaxial cable or another shielded cable is provided, whereon an inversion or expansion process adequate for a certain type of cable can be programmed or carried out. In addition, a new and advantageous method was found which allows the reliable inversion of an exposed shielding braiding of a cable without appreciably disturbing the structure of the braiding.

The objects put forward initially were thus achieved.

The invention therefore comprises a device for folding back or inverting and/or expanding a shielding layer or a shielding braiding (9) or a cable 5, for example, a coaxial cable or another shielded (e.g. multi- conductor) cable. The device has at least two, preferably electronically controlled, motor-actuated processing jaws 3 which are mounted displaceably, pivotally and/or rotatably on the device, which can be moved freely relative to the cable to be processed in the longitudinal direction of the cable and in a plane radially to the cable and/or along concentric conical surfaces or the like around the cable. The position of the processing jaws 3 can be freely selected depending on the time or the desired processing steps. Taking into account the cable properties and the condition of the cable end, the processing jaws 3 can thus expand and fold back or invert a shielding or a shielding braiding (9) by specifically pressing the processing jaws, by knocking (multiple times, pressing at short

time intervals), by sliding or pushing and sweeping. The sequence of the process steps is determined by the type of cable, the pre-processing of the cable end and the desired working result (end position of the shielding or shielding braiding) . The device further comprises one, likewise electronically controlled, motor-actuated first clamping device comprising at least two clamping jaws which securely holds the cable to be processed in the operating state after insertion in the device.

Integrated in the device according to the invention or allocated to the device according to the invention or placed aside, is preferably one optionally conventional cable stripping or stripping device which processes the cable end to be processed in the operating state before insertion into the device according to the invention such that at least the shielding (9) at the cable end has been exposed by a preceding stripping process.

The processing jaws used according to the invention are characterised in that they are neither used for clamping/securing the cable (thus they have no roughened or perforated gripping surface) nor for incising or separating (thus they have no sharp blades) . In addition, the processing jaws are not exactly restricted or matched to a specific single cable diameter as is the case, for example, in the JP-A document. In addition, the processing jaws can be arbitrarily configured according to cable type and intended application. It is particularly important for the device according to the invention that this can be moved correspondingly freely and programmably along or onto the cable.

Compared with the aforementioned JP-A document, the present invention is also distinguished in that it need

not have any rotating jaws or the like. It therefore has a simpler structure. In addition, the avoidance of rotating interventions onto the shielding braiding according to the invention prevents its disintegration or opening into individual strands.

Particular further developments of the device invention are obtained through the features of the dependent claims 2 to 9. For optimum securing and centring inside the device according to the invention, a motor-actuated inner second clamping device can thus be provided, which in addition to the first clamping device 2, can hold the cable to be processed in place in its axial/radial position relative to the device.

The inner second clamping device (see assembly further below) can preferably be freely displaced by motor in the longitudinal direction of the cable 5, preferably in an electronically controlled manner. The location of the clamping position can thus be freely specified in this embodiment. In the course of the processing, the clamping position can be shifted at any time by releasing the clamping and shifting the second clamping jaws 4 and re-clamping.

The second clamping device can additionally be further developed so that the geometry of its clamping jaws 4 can be freely selected from a set of different clamping jaws.

Likewise, the processing jaws can be configured as exchangeable in pairs so that the geometry, the surface condition and the material of the processing jaws can be freely selected from a set of different processing jaws and the processing jaws can be suitably matched to the cable type and the cable diameter range.

Likewise, the geometry of the clamping jaws of the first clamping device 2 can be freely selected from a set of different clamping jaws.

According to a further embodiment, the processing jaws 3 and/or the clamping jaws of the first and/or the second clamping device can be held by means of a quick fastening ( ) . Retrofitting is therefore accomplished rapidly if necessary.

According to a particular embodiment, the processing jaws 3 and/or the clamping jaws 4 of the inner second clamping device and/or the clamping jaws of the first clamping device 2 are preferably actuated by electric motor, electromagnetically or pneumatically.

According to another particular embodiment, the clamping jaws 4 of the inner second clamping device are provided as drivable alternatively into only two positions (open, closed) or can be driven so that all the radial positions between a completely closed and a completely open position can be driven.

According to another preferred configuration, the movement of the processing jaws 3 and the first clamping jaws 4 of the inner second clamping device can be driven successively (sequentially or clocked) or simultaneously (in parallel) .

An electronic controller is preferably provided with an input interface via which, for example, the time when the clamping jaws 4 of the inner second clamping open and close can be freely programmed.

The processing jaws 3 and the clamping jaws 4 of the inner second clamping device can be designed as spring-

loaded. Thus, a clearly defined radial force can be exerted on the cable and its components.

The inner clamping jaws 4 of the inner second clamping device and/or the main clamping jaws 2 can be exchanged (wear or matching to the type of cable etc.) They can be attached by screwing or clamping.

According to a particular embodiment of the invention, the processing jaws 3, the main clamping jaws 2 and/or the auxiliary clamping jaws 4 can also have the form of a sleeve (30) which is divided longitudinally in the centre. In the compressed state, this sleeve (30) can be inserted between the shielding braiding/shielding strands (9) and the dielectric/internal insulation 10.

The radial delivery of the processing jaws 3, main clamping jaws 2 and/or auxiliary clamping jaws 4 can take place linearly and on a circular arc. Consequently, the processing jaws 3, main clamping jaws 2 and/or auxiliary clamping jaws 4 are held on linear guides () or on pivoting guides () .

The method according to the invention comprises the following steps:

Removing the sheath 8 of a cable 5 in the area where the underlying shielding braiding 9 is to be processed or taking over a cable 6 with the sheath 8 already removed; spatial fixing (clamping) of the cable 6 on its sheath

8; pushing the shielding braiding 9 from the free end of the cable 6 in the direction of the cable sheath 8 remaining on the cable 6 so that a compression disk 12 is formed from the shielding braiding 9 in the area of

its transition from the shielding braiding to the front of the sheath 8 ; pulling back the shielding braiding 9 in the direction of the free cable end by sweeping back the compression disk 12 away from the front of the cable sheath 8 and thereby forming a first shielding funnel 13; renewed pushing of the shielding braiding 9 from the free end of the cable 6 in the direction of the cable sheath 8 located on the cable 6 but this time over the front of the cable sheath 8 so that the shielding braiding 9 is inverted or folded back in the form of a second shielding funnel 15 over the free end of the cable sheath 8.

Before inversion takes place, a shielding disk 14 is formed on the front of the sheath 8, which differs from the compression disk in that it only consists of one layer of shielding braiding whereas the compression disk 12 has two shielding layers and a smaller compression height.

The method according to the invention has the result that the structure of the shielding braiding 9, although loosened, nevertheless substantially retains its original structure and is not opened into its individual strands.

For the case according to the invention that only the shielding braiding 9 is to be expanded to form a shielding funnel 13, merely the compression disk 12 is produced and this is then brushed in the direction of the free cable end so that a shielding funnel 13 is formed. This has substantially the same braiding structure as the previously applied shielding braiding and differs in such a manner from that known hitherto.

Further development of the method according to the invention are obtained from the dependent claims 11 and following .

After the shielding braiding 9 has been inverted to form the second shielding funnel 15, this is preferably pressed onto the outside of the cable sheath 8. According to a particular process step, this pressing can be accomplished by "knocking" i.e. the second shielding funnel is pressed several times in succession in the direction of the outside of the cable sheath.

The method according to the invention is preferably carried out by means of processing jaws 3 which can be displaced longitudinally and transversely in relation to the cable 6 and can push, sweep back and press the shielding braiding according to the method.

The method is then improved if, for optimum holding in place and centring of the cable 6 during the inversion process, this is held on the cable sheath side by means of a first clamping device 2 and also on the first free side by a motor-actuated inner second clamping device 4.

The method can be cable-optimised if a series of different clamping jaws 2, 4 and/or processing jaws 3 are provided from which the user selects the suitable ones and uses them for the method.

One variant of the method provides that the clamping jaws 2, 4 are pressed onto the cable 6 by means of a clearly defined radial spring force in order in this way to keep the pressing force to a defined value which is gentle on the cable but secure.

A particular variant or alternative to the above method consists in that the inner second clamping jaws 4 have the form of a sleeve divided longitudinally at the centre, which is arranged coaxially to the cable 6 and is inserted in the compressed state between the shielding braiding/shielding strands 9 and the dielectric/inner insulation 10.

Optionally after insertion, this sleeve 30 can be opened slightly so that the shielding braiding is expanded (to form a first shielding funnel 13) .

According to the invention, the processing jaws 3, first clamping jaws 2 of the first clamping device and/or second clamping jaws 4 of the inner clamping device are fed linearly or on an arc in relation to the cable 6.

Structure of the device

The drawing shows an exemplary embodiment of the invention. This is explained in particular in its new and inventive features. Since the exemplary embodiments are based on the structure of the Schleuniger US 2600, for the structure of the other components reference is made to this known machine or to the International Patent Application WO03/100935. The description of the figures in WO03/100935 is thus deemed to be co- disclosed or insofar as it lies within the scope of this invention.

Figure 1 shows a longitudinal section through the device according to the invention.

Figure 2 shows a perspective view of the device according to Fig. 1.

Figure 3 shows a detail of the structure from Fig. 1 and specifically the assembly comprising trigger sensor and inner second clamping device.

Figure 4 shows exemplary embodiments of different processing jaws 3 (examples).

Figures 5 to 15 show process steps according to the invention that can be carried out on a device according to Figs . 1 to 5.

Figure 5 shows another detail from a structure of the device according to Fig. 1 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a first process step before inserting the cable 6.

Figure 6 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a second process step during insertion of a cable.

Figure 7 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during clamping of the cable 6 by means of main clamping jaws 2.

Figure 8 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during clamping of the cable 6 by means of the main clamping jaws 2 and closing the processing jaws 3.

Figure 9 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during pushing of the shielding braiding 9 back into the form of a compression disk 12.

Figure 10 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during gripping of the compression disk 12 by the processing jaws 3.

Figure 11 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after brushing back the compression disk 12 in the form of a shielding funnel 13 over the dielectric 10 by the processing jaws 3.

Figure 12 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after brushing back the compression disk 12 in the form of a shielding funnel 13 over the dielectric 10 by the processing jaws 3 or during renewed compression of the shielding braiding 9 to form the shielding disk 14 with preferred additional clamping of the cable 6 by means of inner clamping jaws 4.

Figure 13 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after inverting the compression disk 12 or shielding braiding 9 to form the shielding funnel 15 over the sheath 8 by the processing jaws 3 or

during pressing of the shielding braiding 9 onto the sheath 8.

Figure 14 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after inverting the compression disk 12 or shielding braiding 9 to form the shielding funnel 15 and pressing the same onto the sheath 8 by the processing jaws 3 during release of the cable by the inner clamping jaws 4.

Figure 15 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during the complete release of the cable 6 by the main clamping jaws 2 and inner clamping jaws 4.

Figure 16 shows a detail of the clamping device.

Figures 17 and 18 show a detail of the driving of the processing jaws from two different viewing angles.

Figure 19 shows the detail of the first clamping device 2.

Figure 20 shows in detail the driving of the processing jaws 3 by means of the wedge 23 and drive motor 18.

Figure 21 shows the detail of the supporting arms 22 for the processing jaws 3.

Figure 1 shows a longitudinal section along the cable axis 1 through a device according to the invention (see Fig. 2) :

A chassis 21 carries a clamping device comprising a first drive (motor) 16 for main clamping jaws 2 which are arranged so that a cable can be clamped centrally positioned with respect to its cable axis 1. In the position of use the cable axis 1 then corresponds to the cable path on which the partially stripped cable 6 with its exposed shielding braiding 9 is inserted radially or axially. The chassis 21 also carries a drive (motor) 17 for processing jaws 3 which can be displaced along and transversely to the cable axis 1. The processing jaws 3 are held on pivotable jaw arms 22.

The chassis 21 also carries a drive motor 18 for the transverse displacement of the processing jaws 3 radially to the cable axis 1.

The chassis 21 further carries supports 7 for the inner (second) clamping jaws 4 which are driven by a drive motor 20 held on the chassis (Fig. 2) for the displacement of a trigger sensor 5 or its sensor support 19 and the inner clamping jaws 4.

The sensor support 19 is also mounted on the chassis so that it can be displaced longitudinally along the cable axis 1.

The other visible components are known to the person skilled in the art from the structure of the Schleuniger US 2600 (see WO03/100935A) .

Figure 2 shows a perspective view of the device according to Fig. 1. Clearly visible is a driving wedge 23 for the opening and closing movement of the processing jaws 3 which is driven by means of the drive motor 18. At least one drive rod 24 is provided with

the drive motor 17, this being responsible for the longitudinal displacement of the processing jaws 3.

The drives are given as electric motors. However, they could optionally also be replaced by suitable compressed air drives or the like.

Figure 3 shows a detail of the structure from Fig. 1 and specifically the assembly comprising a trigger sensor 5 in a trigger support 19 and the inner second clamping device with the clamping jaws 4. The clamping jaws 4 can be opened and closed by means of pneumatic cylinders. The pneumatic system also delivers a spring force for a constant pressing force of the jaws 4 on the cable 6. A driving slider 25 is rigidly connected at one end to one end of the trigger support 19 and at the other end is displaceably connected to the drive motor 20 via a spindle drive 26.

Firmly connected to the other end of the trigger support 19 is a bearing block 27 which is mounted on guide rods 28a, 28b fixed to the chassis so that it can be displaced longitudinally in relation to the cable axis 1. The bearing block 27 carries supports 7 for inner clamping jaws 4 which can be applied to the cable 6 via their own drive if necessary.

The trigger sensor 5 therefore comprises an adjustable- length sensor, conventional per se, for triggering the control electronics of the inversion device which triggers an inversion process after contact by a cable 6.

Figure 4 shows exemplary embodiments of different processing jaws 3 (examples) . The processing jaws 3 have a curved or prismatic inner surface 33 which can be differently configured according to the type of

cable. The processing jaws 3 can preferably be fixed interchangeably by means of a quick fastening on their j aw arms 22.

Process sequence

The method shown in Figs. 5-15 is merely a preferred possibility as to how a shielding braiding 9 can be inverted by means of a device according to the invention. The largely free programmability opens up many paths to achieving the goal. The process shown here is merely an example to show the possibilities offered by the device. On the other hand, the process shown is new and inventive compared with conventional methods for inversion.

Figure 5 shows another detail from a structure of the device according to Fig. 1 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a first process step before inserting the cable 6. This shows the rest position before the beginning of the method.

In this exemplary embodiment the cable is already partially stripped so that the sheath 8 exposes the shielding braiding 9 at the free end of the cable 6.

Depending on the cable structure, another insulating layer, e.g. a dielectric 10 which encases an inner conductor 11, is located underneath the shielding braiding 9.

The preferred method according to the invention proceeds according to the following 11 steps:

Step 1

The main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 are completely opened and a cable

6 is brought into an input position. In this exemplary embodiment the cable 6 is prepared for insertion axially along the cable axis 1. However, it can also be inserted radially onto the cable axis 1, e.g. by a gripper arm.

Figure 6 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a second process step during insertion of a cable.

Step 2

The cable 6 is inserted into the device in the prepared state. In the example shown here, the shielding braiding (9), the dielectric 10 and the inner conductor (11) are exposed by previous stripping processes.

The processing is triggered by axial contact of the trigger sensor 5 by the free cable end. Depending on the application, it is also possible for the processing process to be started in another manner (e.g. the operator presses a foot pedal after insertion or a higher-level system starts the processing process) .

Figure 7 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during clamping of the cable 6 by means of main clamping jaws 2.

Step 3

After triggering the processing process, the cable 6 is clamped by the main clamping jaws 2 and held securely. To this end, the main clamping jaws 2 are motor driven in the radial direction towards the cable 6 from both sides. This delivery movement can be linear (the first

clamping jaws 2 are located in a linear guide) or along a pivot curve (the processing jaws 3 are connected guidelessly and firmly to their pivot arms 22) .

Figure 8 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after clamping of the cable 6 by means of main clamping jaws 2 during closure of the processing jaws 3.

Step 4

After the cable 6 has been securely held in place, the processing jaws 3 are driven into position. To this end, the processing jaws 3 can be moved freely backwards and forwards along the cable axis 1. During positioning the processing jaws 3 are fed in the longitudinal direction of the cable axis 1 or, after positioning in the longitudinal direction, radially to the cable 6. In the case shown here, the processing jaws 3 are driven precisely in front of the exposed braiding 9. The processing jaws 3 contact the exposed shielding braiding 9 at exactly its free end at the front .

Figure 9 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during pushing-back of the shielding braiding 9.

Step 5

The processing jaws 3 now move in the direction of the main clamping jaws 2. The shielding braiding 9 is compressed upwards. The shielding braiding 9 thereby forms a compression disk 12. This disk has two layers as a result of the compression process, i.e. the

shielding or the shielding braiding 9 is folded one above the other.

Figure 10 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during gripping of the compression disk 12 by the processing jaws 3.

Step 6

The processing jaws 3 are now driven onto the front side (the side facing the main clamping) of the compression disk 12, the compression disk 12 not being touched. In the process shown here the processing jaws 3 are delivered so far in the radial direction towards the cable 6 that they do not completely touch the external insulation 8.

Figure 11 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after brushing back the compression disk 12 in the form of a shielding funnel 13 by the processing jaws 3.

Step 7

The processing jaws 3 are now driven in the direction of the trigger sensor 5, that is, towards the free end of the cable 6. During this movement the processing jaws 3 are simultaneously continuously opened. A shielding funnel 13 is formed. The shielding or the shielding braiding 9 unfolds and is no longer folded over one another at the end of step 7.

Figure 12 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after brushing back the

compression disk 12 to form a shielding funnel 13 by the processing jaws 3 or during renewed compression of the shielding braiding 9 to form the shielding disk 14 with preferred additional clamping of the cable 6 by means of inner clamping jaws 4.

Step 8

In order to hold the cable 6 better, the inner clamping jaws 4 are delivered radially to the cable. The cable 6 is thus clamped on two sides. The processing jaws 3 are then delivered radially to the cable 6 until the processing jaws 3, without touching the dielectric/insulation 10, can bring the shielding funnel 13 into the form of a shielding disk 14 by a movement along the cable axis 1 in the direction of the main clamping jaws 2. The shielding disk 14 now only consists of single-layer shielding braiding.

Figure 13 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after inverting the compression disk 12 or shielding braiding 9 to form the shielding funnel 15 over the sheath 8 by the processing jaws 3 or during pressing of the shielding braiding 9 onto the sheath 8.

Step 9

The processing jaws 3 are now driven further in the direction of the main clamping jaws 2. During this movement, the processing jaws 3 are preferably opened continuously at the same time. Alternatively, this process can take place without continuous opening, i.e. with only a certain positive amount of opening of the processing jaws 3 compared with the cable 6. A shielding funnel 15 is formed by both methods. This ninth partial process can now be repeated as desired

until a shielding or shielding braiding lying almost completely on the external insulation 8 has been formed from the shielding funnel (15) .

An additional partial step of this process section can involve the processing jaws being pressed onto the cable 6 in their position remote from the free end of the cable 6 and thereby abutting the shielding funnel 15 as far as possible against the sheath surface. This process can also be repeated in a "knocking" fashion.

Figure 14 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step after inverting the compression disk 12 or shielding braiding 9 to form the shielding funnel 15 and pressing the same onto the sheath 8 by the processing jaws 3 during release of the cable by the inner clamping jaws 4.

Step 10

The inner clamping jaws 4 and the processing jaws 3 are opened or driven completely into their initial position.

Figure 15 shows the detail according to Fig. 5 with the main clamping jaws 2, the processing jaws 3 and the inner clamping jaws 4 as well as a trigger sensor 5 in a further process step during the complete release of the cable 6 by the main clamping jaws 2 and inner clamping jaws 4.

Step 11 The main clamping jaws 2 are opened. The finished cable 6 can be removed from the device.

Figure 16 shows a detail of the clamping device. Figures 17 and 18 show a detail of the driving of the processing jaws from two different viewing angles. Figure 19 shows the detail of the first clamping device 2.

Figure 20 shows in detail the driving of the processing jaws 3 by means of the wedge 23 and drive motor 18. Figure 21 shows the detail of the supporting arms 22 for the processing jaws 3. The figures are described in a coherent and overlapping manner. The same reference numerals denote the same components . The figures and their description are not restrictive but merely show an example for the method according to the invention and for the device according to the invention .

The figures and their description together with the reference list and the technical content of the claims likewise pertain to the disclosure of this application.

REFERENCE LIST

1 Cable axis

2 Main clamping jaws 3 Processing jaws

4 Inner clamping jaws

5 Trigger sensor

6 Cable

7 Support for inner clamping jaws 8 External insulation - cable

9 Exposed shielding / exposed shielding braiding

10 Exposed dielectric /exposed inner insulation

11 Exposed inner conductor

12 Compression disk: The shielding braiding is compressed to form a disk-like structure, i.e. two layers of the shielding braiding 9 lie against one another or over one another

13 Shielding funnel over dielectric 14 Shielding disk: the shielding disk consists of a layer of shielding braiding

15 Shielding funnel over outer insulation

16 Drive motor for actuating main clamping jaws

17 Drive motor for displacing the processing jaws along the cable axis

18 Drive motor for delivering the processing jaws radially to the cable

19 Sensor support

20 Drive motor for displacing the trigger and the inner clamping jaws along the cable axis

21 Chassis

22 Supporting arm for processing jaws 3

23 Wedge for radial delivery of the processing jaws 3

24 Control rod for longitudinal adjustment of the processing jaws 3

25 Driving piece for sensor support 19

26 Spindle drive for driving piece 25

Bearing block for inner retaining device a, b guide rods fixed on chassis a, b, c inner surface of processing jaws 3