Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
  • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
  • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
  • H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
  • H02G1/1248—Machines
  • H02G1/1251—Machines the cutting element not rotating about the wire or cable
  • H02G1/1253—Machines the cutting element not rotating about the wire or cable making a transverse cut
  • H02G1/1256—Machines the cutting element not rotating about the wire or cable making a transverse cut using wire or cable-clamping means
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26

Definitions

• the invention relates to a stripping device, in particular for stripping multi-core cables, according to the preamble of claim 1, and to a method for stripping such cables, according to the preamble of claim 6.
• Multi-core cables in the sense of the invention are cables with at least 2, but preferably at least 3 wires, each with at least one wire insulation and at least one second insulation - the cable sheath - together around the insulated wires.
• the insulated wires - the cable cores - are often twisted within the cable jacket.
• the invention is particularly concerned with the stripping of such cables with twisted wires, but should also be applicable to non-twisted cable wires.
• Such cables are usually stripped in two stages by first using special stripping knives - e.g. Radius V-knives or by means of special rotary cable sheath knives the cable sheath is removed and then - usually on a second machine - the wire insulation is removed with special flat knives or form knives.
• special stripping knives e.g. Radius V-knives or by means of special rotary cable sheath knives the cable sheath is removed and then - usually on a second machine - the wire insulation is removed with special flat knives or form knives.
• the insulated wires are first oriented by hand so that they come to lie next to each other, and then cut into them with a flat knife or with a flat form knife on both sides of the wire insulation, or a form knife is used that all twists Includes wires in one, whose wire insulation partially cuts in and at the same time removes all insulation.
• the exposed cable cores have also been stripped individually with a second stripping device, by manually guiding them one after the other into the stripping device, which in turn entails increased manipulation.
• the invention is based on the object of finding a device and a method in which the precision of the stripping is increased without a significantly increased outlay on equipment. Previously required manual work should be eliminated.
• the stripping device according to the invention for multi-core cables fulfilled the task well by permitting a relative movement of the cable between a tensioning device and at least two counter-rotating knives and / or at least two counter-rotating, non-rotating jaws, the knives and / or the jaws along the cable cores can be moved relative to one another relative to the tensioning device and in the direction of the cable cores and, in the manner of a grazing movement, bring the cable cores out of their twisted or non-parallel position into a parallel position in a plane which is parallel to the cutting edges of the knives lies.
• tensioning device in the sense of the invention is to be understood to mean all conventional devices between which a cable can be held fixed in position for the purpose of processing by means of knives. These include in particular clamping jaws, transport rollers and conveyor belts or combinations thereof.
• either these or the jaws or the knives or all of them can generally be moved axially.
• both the jaws and the knives can remain stationary and, as a rule, only the cable is moved by rotating the rollers or belts.
• this structure and this method also works with cables with non-twisted cable cores, but which are not predicted during the stripping can be how the cable cores are oriented within the cable jacket.
• a device according to the invention is expediently integrated in a stripping device with a corresponding cable sheath knife for the cable sheath, but can also be accommodated in a separate housing so that it strips stripped cable strands.
• the grazing movement can be carried out jointly by the knives as well as by their own jaws as well as by both. It is essential that there is no premature cutting by the knives.
• these jaws are supported or supported by the knives.
• the easiest way to do this is through a guide rail, each of which guides one jaw radially with respect to the cable axis, each jaw being resiliently supported with respect to its knife and wherein the jaw surface facing the cable wires is closer to the cable wires in the idle state than the cutting edge of the knife. This protrusion of the jaws reliably prevents premature cutting of the knives.
• Knits are used as knives.
• the simplest is a flat knife, but better quality can be achieved with a form knife that has semi-circular partial cutting edges that are shaped to match the thickness of the wire insulation and whose number corresponds at least to the number of cable wires that are to be stripped in this process.
• the cutting edge of the knife - in the sense of the explanations in this patent application - also means an imaginary connecting line between such semicircular cutting edges.
• the knives that are responsible for stripping the cable sheath can be single or in pairs, both rigid V-knives, radius knives, form knives and rotating knives. As is known per se, they are chosen depending on the structure of the cable sheath. The detailed structure of such a device is not dealt with in this application, since a multitude of cable sheath stripping devices is known to the person skilled in the art. For example, the applicant launched a type JS 8300 that works with a rotating stripping knife. For example, the present invention could be incorporated into such a type.
• a process is also encompassed according to the invention in which the knives and jaws are axially rigid with respect to the cable cores and the tensioning device with or for the cable cores perform an axial relative displacement movement before cut the knives. It is preferred in any case that at least one knife edge is arranged on the side of the cable which is closer to the adjacent cable end and at least one jaw on the side facing the cable origin. As a result, the grazing process has a more lasting effect on the position of the cable wires before cutting.
• the invention also encompasses the process in which the cable itself is displaced relative to the jaws or knives - in particular through the rotary drive of transport rollers or belts, which also perform tensioning functions.
• the invention differs primarily in that the knives for the cable cores are non-rotating are and that according to the invention a grazing movement is provided, which is neither provided nor would make sense in such known devices which serve to strip stripped coaxial cables.
• Fig.l A multi-core cable with twisted cable cores - a typical power cord - while removing the cable jacket;
• FIG.2 An exemplary cable sheathing knife - in this case a radius or radius V-knife - in view;
• a jaw - designed as a spring-loaded slider - moves onto the twisted cable wires of the cable;
• Fig.5 The top view of the structure according to Fig.4;
• Fig.9 The top view of the structure according to Fig.8;
• Fig.10 The form knife for stripping the cable wires in view
• Fig.11 The view and section through two cooperating knives with integrated sprung jaws or sliders;
• Fig.l shows a typical situation when stripping a power cable 2, in which two opposite cable jacket knives 4 cut the jacket symmetrically to the cable axis 1 and strip a jacket piece 5.
• the contours of the form knife 4 were chosen so closely that parts of the insulation of the cable wires 3a were removed at the same time as the sheath - but without great precision, as stated above. According to the invention, one is now limited to precise stripping of the jacket piece 5 alone. Alternatively, rotating knives could also be used here. 10
• FIGS. 3-5 show the step according to the invention of separating or orienting the cable cores 3a to parallel cable cores 3b. It is not essential whether the cable cores ultimately lie horizontally or in some other axial plane around the cable axis 1. It is crucial that this level is related to the knife edge of the knife 7; especially that it lies parallel to the knife edge. The separation and orientation takes place by a grazing movement of mutually acting jaws designed as sliding pieces 6.
• This movement includes a relative movement between the jaws and the cable towards the cable end and a movement of the jaws towards the cable cores.
• the latter is effected in particular by the force of one spring 11 each, which acts on the sliding pieces 6 on the one hand and is supported on a spring holder (not shown) on the other hand.
• the spring holder according to the invention is comparable to a conventional knife holder according to the invention.
• the sliders 6 are guided in a rail of the knife 7 and the spring 11 is supported with respect to the knife 7.
• Fig. 7-9 show the - known per se - process of cutting and removing the insulation pieces 9 from the cable wires 8 to expose the conductor.
• the sliders are not exactly opposite each other. In other embodiments, e.g. where the jaws and knives are separated, or e.g. according to Fig. 12, they will preferably lie opposite one another.

Landscapes

• Removal Of Insulation Or Armoring From Wires Or Cables (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Related Child Applications (2)

Publications (1)

Family

ID=25683610

Family Applications (1)

Country Status (5)

Cited By (6)

Families Citing this family (5)

Citations (2)

• 1999
  • 1999-04-01 DE DE59900937T patent/DE59900937D1/de not_active Expired - Lifetime
  • 1999-04-01 KR KR1020007011070A patent/KR100696990B1/ko not_active Expired - Fee Related
  • 1999-04-01 EP EP99909133A patent/EP1070374B1/de not_active Expired - Lifetime
  • 1999-04-01 WO PCT/IB1999/000561 patent/WO1999052188A1/de not_active Ceased
  • 1999-04-01 JP JP2000542836A patent/JP2002510955A/ja active Pending

Patent Citations (2)

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