EP0091631A1 - Device for guiding quads of a telephone cable twisted on a cabling and stranding machine - Google Patents

Abstract

This guiding device (18) of quarters (11) produced on a first stranding set then transferred to a committing die (8) placed before a second stranding set, comprises a distribution grid (6) of quarters (11) at the outlet of the first stranding assembly and guide means (7) placed between the distribution grid and the committing die. This device is characterized in that the guide means separate external quarters (11A) and internal quarters (11B). This invention is mainly used in the manufacture of twisted telephone cables.

Description

The subject of the present invention is a device for guiding quarters produced on a first stranding set then transferred to a committing die placed before a second stranding set, comprising a grid for distributing quarters at the outlet of the first stranding set and guide means placed between the distribution grid and the committing die.

This device makes it possible to strand a cable on a regular basis to avoid the creation of non-stranded zones, that is to say parallel to the main axis of the cable, which geometrically and electrically unbalance said cable, in particular a telecommunication cable.

It is known that for stranding cables, in particular telephone cables, one of the current techniques consists in stranding on a machine known as an "SZ machine" which twists this cable alternately in one direction and in the other, without theoretically never leaving appear from areas where the wires are parallel to the main axis of the cable.

One can, for example, manufacture on such a machine, a cable having fourteen groups of four wires which will be stranded in a first stranding assembly in order to form fourteen fourths.

These fourteen twisted quartes are directed in a distribution grid and are then grouped together by a committing die to form the cable proper which will then be wrapped with a ribbon to avoid unstacking, twisted again according to the "SZ" principle in a second stranding assembly then wound on a take-up reel, before being transferred to another machine.

During the passage of each quarter, between the distribution grid and the committing channel, some of them hinder each other, thus favoring the de-quartering, that is to say the absence of stranding over known distances, which causes geometric and electrical imbalances letting appear with the use of the crosstalk phenomena.

Document FR-A-1,602,865 discloses a cable manufacturing installation using a collector placed between a grid of distribution and a sector, but this collector does not separate the exterior and interior quarters.

The present invention overcomes this drawback by proposing the addition of a guide grid or a guide cone making it possible to separate the quarters well before they pass through the committing die.

The guiding device according to the invention is characterized in that the guiding means separate outside quarters and inside quarters.

Advantageously, the guide means are a guide grid comprising, in its center, through orifices provided with ceramic pellets to guide the inner quarters, and at its periphery curvilinear supports in ceramic material to guide the outer quarters.

Advantageously, the guide means are a guide cone fixed in the distribution grid and separating the interior quarters from the exterior quarters, the interior quarters being guided by an interior conical portion of the guide cone.

• La figure 1 représente un plan général schématique d'une câbleuse- toronneuse dite "machine SZ" nécessaire à cette fabrication.
• La figure 2 représente en perspective et en vue agrandie, un dispositif de guidage selon l'invention avec sa grille de guidage et la filière de commettage, entre les deux ensembles de toronnage.
• La figure 3 représente en perspective et en vue agrandie, un autre dispositif de guidage selon l'invention avec son cône de guidage et la filière de commettage, entre les deux ensemble de toronnage.
• La figure 4 représente, en coupe, le dispositif de la figure 3.

It is described below, by way of example and with reference to the figures of the accompanying drawing, a guide device according to the invention used in the manufacture of a telephone cable comprising fourteen quads. In this particular case, one hundred and twelve coils connected in pairs are used to carry out an automatic change when necessary; fifty six threads therefore fit into a first stranding assembly which will produce fourteen fourths. These fourteen quarters are part of a second set of stranding which will produce the telephone cable itself.

• FIG. 1 represents a general schematic plan of a stranding machine known as "SZ machine" necessary for this manufacture.
• Figure 2 shows in perspective and in enlarged view, a guide device according to the invention with its guide grid and the committing die, between the two stranding assemblies.
• FIG. 3 shows in perspective and in enlarged view, another guide device according to the invention with its guide cone and the committing die, between the two stranding assemblies.
• FIG. 4 represents, in section, the device of FIG. 3.

In FIG. 1, the coils 1 each carry a wire 10 which enters a first stranding assembly 2 comprising a first group 3 of stranding machines, accumulators 4, a second group 5 of stranding machines.

The quarters 11 thus formed pass through a guiding device 18 comprising a distribution grid 6 and a guiding grid 7, then they are grouped in a committing die 8. The cable 12 thus formed is wrapped in a wrapping assembly 9 stranded in the second stranding assembly 13 comprising a first stranding head 14 and a second stranding head 15, pulled by a capstan 16 and wound on a spool 17. This spool will then be transferred to another machine to subject the cable other operations.

In FIG. 2, a distinction is made between the guide device 18 comprising the distribution grid 6 provided with orifices 22 for the passage of quarters 11, the guide grid 7 provided with four central orifices 20 and ten curvilinear supports 21 for the passage of quartes 11. A distinction is also made between the committing die 8 which groups together the fourteen quartes 11 forming the cable 12, that is to say ten outer quartes 11A and four inner quartets 11B.

In FIG. 3, another guide device 18 is seen comprising the distribution grid 6 provided with orifices 23 for passage of the ten external quarters 11A, a guide cone 24 fixed in the distribution grid 6 inside which pass the four interior quarters 11B. A distinction is also made between the committing die 8 which groups together the fourteen quartes 11 forming the cable 12.

FIG. 4 shows that the ten outer quarters 11A are guided by the outside of the cone 24 and that the four inner quarters 11B are guided by a conical inner surface 25 of the cone 24.

Without departing from the scope of the invention, the guide device can of course comprise more or less orifices for the passage of fourths, for mounting on a machine manufacturing other types of cables.

Claims (3)

1 / Guiding device (18) of quarter blocks (11) produced on a first set (2) of stranding then transferred into a committing die (8) placed before a second set (13) of stranding, comprising a distribution grid ( 6) at the outlet of the first stranding assembly, and guide means (7, 24) placed between the distribution grid and the committing die, characterized in that these guide means separate external quarters (11A) and interior quarters (11B). 2 / A guide device according to claim 1, characterized in that the guide means are a guide grid (7) having in its center passage holes (20) provided with ceramic pellets to guide the inner quarters (11B ), and at its periphery curvilinear supports (21) of ceramic material to guide the outer quarters (11A). 3 / guide device according to claim 1, characterized in that the guide means are a guide cone (24) fixed in the distribution grid (6) and separating the inner quarters (11B) from the outer quarters (11A), the inner quarters (11B) being guided by an inner conical part (25) of the guide cone (24).

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