FR2526773A1 - Anti-ballooning device for filament unwinding overend - comprising surrounding ring with internal fringe of inwardly-directed bristles - Google Patents

Abstract

An anti-ballooning device for a wire or filament (4') being withdrawn over-end from a spool (7) comprises a ring (11,12) concentric with the bobbin, situated close to the upper flange thereof, and carrying a fringe of radially-oriented bristles (13) around its inner circumference. For pairs of bobbins joined tail-to-top to avoid interrupting off-winding when a bobbin is exhausted, two rings may be joined together at one side, with a connecting channel (16) between them, giving an hour-glass form which enables the tail to pass from one ring to the other when the reserve bobbin commences to unwind. The device provides effective balloon control without hindering access to the filament, and remains effective at high offtake speeds.

Description

Anti-bloating device for a wire emitted on parade on a reel.

 The present invention relates to an anti-bloating device for a wire emitted during the parade from at least one spool.

 The unwinding of a reel in the process consists of pulling the thread in the axis of the reel; this wire follows the edge of the spool during its unwinding and then passes through a fixed point located on the axis of the spool. At very high drawing speed, under the action of the centriguge force, the thread tends to balloon, that is to say, to leave the edge of the spool. If the wire is heavy, this tendency is even more noticeable and if this phenomenon is amplified the wire can then touch an adjacent obstable and break, thus causing the stopping of a manufacturing machine.

 Devices have already been proposed limiting this bloating phenomenon, but these prior devices are; either bulky like the "DECOMBE" reel which is a sheet metal cone enveloping the wire from an edge of a cheek of the coil and practically up to the fixed point situated on the axis; is ineffective at high speed when it is a coronnelle enveloping a cheek of the coil and having on its periphery external bristles of synthetic material arranged in the radial direction.

 The present invention overcomes these drawbacks by providing a simple and effective anti-bloating device at all drawing speeds.

 The anti-bloating device according to the invention is characterized in that it consists of a closed envelope whose inner surface is bristling with hairs arranged radially and in that this envelope is placed near a cheek of the coil.

 Preferably, in the case of a single emission from a coil, the closed envelope is a ring.

 According to another characteristic, in the event of double emission from two coils, the closed envelope consists of two portions of rings whose openings are opposite one another, giving this envelope a general shape in "8".

 I1 is described below, by way of example and with reference to the figures of the appended drawing, a dual emission anti-balking device on a machine called "SZ" used for the manufacture of telephone cables, and a device for single issue.

 Figure 1 shows a general top view of the installation of the machine equipped with a double emission.

 2 shows a station (seen along A in Figure 1) 'double transmission of a wire.

 Figure 3 shows a top view of the envelope for double emission.

 FIG. 4 represents a device for simple transmission.

 FIG. 5 represents a ring for simple transmission, seen along B of FIG. 4.

 In FIG. 1, we see the pulling assembly 1 grouping together four rows each having double transmission stations 2, -2a ..., 2n, a central aisle 3 allowing the operator to load the central rows, l 'set 4 of wires 4' which enter the stranding machine 5 called "SZ", each wire 4 'is guided from its transmitting station 2 to the entrance of the machine 5 by pulleys 6.

 Each transmitting station 2 comprises two coils 7, 8 and an envelope 9 preventing the ballooning of the wire 4 '. A transmission station is shown in Figure 2 along arrow A in Figure 1.

 In this FIG. 2, the transmitting station 2 comprises two coils 7, 8, the end of the wire 4 ′ of the coil 7 is connected to the start of the wire of the coil 8.

 The coils are fixedly put in place on a support 14. The coil 7 comprises a cornelia 7 'and the coil 8 comprises a cornelia 8'. These corellelles are placed on the cheek of each coil, and rotate along the axis of this coil, driven by the wire 4 '.

 The envelope 9 is fixed on two vertical supports 15, 15 '. This envelope consists of two parts 11, 12. Each part is placed perpendicular to the axis of each coil, and has an inner surface bristling with bristles 13, 13 'of synthetic material fixed securely to the envelope.

 These surfaces are partially cylindrical and face each other at each opening to create a passage 16, as visible in Figure 3.

 The function of this anti-bloating envelope is as follows; during the unwinding of the wire 4 'from the coil 7, the part 11 avoids the bloating of the wire which rubs on the bristles 13 and when the wire 4' is fully unwound, its end, attached to the beginning of the wire of the coil 8, crosses the passage 16 and it is then the part 12 which prevents the ballooning of the wire thus rubbing on the bristles 13 '.

 It then suffices to replace the empty coil 7 with a full one and then join the ends of the wires and the passage of the wire from one coil to the other will take place when the coil 8 is empty.

 FIG. 4 shows a simple transmitting station 30 comprising a support 20 for positioning the coil 23, a vertical support 21 for fixing the envelope 22. The coil 23 comprises a bell 23 ', which rotates along the axis of this coil, driven by the wire 24. The pulleys 25 directs the wire 24 after the emission.

 Figure 5 shows the circular shape of the inner surface of the envelope. This surface is bristling with bristles 26 of synthetic material fixed securely to the envelope.

 Without departing from the scope of the invention, the envelope can be placed closer to the cheek of the spool and possibly on the other side of the cheek, that is to say slightly enveloping the coil at this cheek. The hairs can of course be more or less numerous and be made of other materials. This invention is of course applicable to all kinds of threads emitted at the parade.

Claims (3)

1 / Anti-bloating device for a wire emitted on parade from at least one spool, characterized in that it is constituted by a closed envelope (9) whose inner surface is bristling with hairs arranged radially and in that this envelope is placed near a cheek of the coil. 2 / Device for anti-bloating a wire emitted on parade from a reel according to claim 1, characterized in that the closed envelope is a ring (22). 3 / device for anti-bloating a wire emitted in the procession from two coils whose axes are concurrent according to claim 1, characterized in that the closed envelope consists of two portions of rings (11, 12) whose openings are opposite one another, giving this envelope a general "8" shape.