EP0480852A1 - Cabling machine for threads comprising regulating device - Google Patents

Abstract

Machine for cabling threads (1, 2) comprising a regulating device (7). The regulator (7) essentially comprises a body (25) of generally cylindrical shape having a window and extended at its free end by a circular plate (27) which carries two eyelets (28, 29) for guiding each thread (1) and (2) and which define with the entrance (30) of the exit channel of the cable (8) a right-angled (or substantially right-angled) triangle, the large side of the right angle of which is substantially located along the rotational axis of the cabling head, the cabling point (33) of the elementary threads (1, 2) being stabilised on this side at a point intermediate between its two ends (29, 30). <IMAGE>

Description

The present invention relates to an improvement made to machines making it possible to produce cords, that is to say textile elements of great length, obtained by assembling by twisting at least two elementary threads.

In general, and as is apparent from the appended FIG. 1 which is a reproduction of the figure illustrating FR-A-2,565,261 (corresponding to US-A-4,592,195), a wiring machine consists of a plurality of identical working positions, arranged side by side, each position comprising an assembly analogous to a double twist spindle reel (DT assembly) making it possible to join two elementary wires (1,2) by twist.

In such a machine, the wire (1) taken from a power source not shown, arrives at the lower end of the hollow spindle (3) of the DT assembly and passes through a channel drilled radially in a rotary plate (3a) of said spindle. Due to the rotation of this spindle, it undergoes a false twist and it forms a balloon (1a) which surrounds the bowl (3b) of the spindle (3) of the DT assembly. Inside the bowl (3b) is disposed a coil (4) of the second wire (2). This second wire (2) passes through a braking device (6), also called "voltage regulator" and which is carried by the cover (3c) of the bowl (3b). The assembly of the wires (1) and (2) is obtained by twisting by means of an assembly designated by the general reference (7), and commonly called "wiring head" or "length regulator".

The invention relates more particularly to the "wiring head" or "length regulator" (7) which such installations comprise as well as to a new type of assembly integrating both the voltage regulator (6) (or device braking) and such a wiring head or length regulator (7) as will be seen in the following description.

After joining by twist of the two wires (1,2) at the outlet of the wiring head (7), the formed cable (8) passes over a device (9) blocking the rise in torsion, then, after possible passage around 'a reference guide (10), it is returned to a conventional system designated by the general reference (11).

In general, to date, the wiring heads (7) consist essentially of a rotating assembly mounted in an upper bearing (12) and whose axis of rotation coincides with that of the spindle (3). This rotating assembly generally comprises two pulleys (13,14) arranged on the same axis transverse to that of the spindle (3) and angularly integral with one another. The wires (1,2) are wound around these pulleys (13,14), then are brought together at the actual wiring point (15), and then pass inside an axial channel of the rotating assembly for be brought to the torsion ascent blocking system. Such wiring heads with rotary pulleys have been known for a very long time and are described in particular in FR-A-1 208 273 as well as in FR-A-1 202 572 which describes another embodiment according to which the two pulleys are mounted on their support along an axis coincident with the axis of the spindle, instead of being mounted on an axis transverse to that of said spindle as seen above.

It should be noted that in such wiring heads or regulators, the rotary drive can be obtained either by the external wire (1) forming the balloon (1a) or, optionally, by means of an individual motor allowing synchronism perfect.

In all cases, one of the main problems which arises is that of communicating very regular voltages both to the elementary wires and to the cable formed as well as having as low an inertia as possible for the rotating assembly. Furthermore, such a wiring head must be able to be easily maintained and allow easy installation of the wires around the rollers.

Now we have found, and this is the subject of the present invention, a particularly simple design solution, which not only makes it possible to solve all of these problems, but also allows the use of such a regulator assembly without pulley (or caster) for returning the elementary wires, such a possibility being made possible by the fact that, thanks to the invention, the points of interlocking and friction of the elementary wires are eliminated as much as possible path and that, moreover, the wiring point of the two wires is perfectly positioned and stabilized.

• l'un proche de son bord périphérique et à l'intérieur duquel passe le fil formant le ballon et qui entraîne l'ensemble en rotation lors de la formation du câblé,
• l'autre, disposé à proximité ou confondu avec l'axe de rotation de l'ensemble, et à l'intérieur duquel passe le second fil provenant de la bobine d'alimentation montée à l'intérieur de la cuvette de la broche,

ces deux oeillets définissant avec l'entrée du canal de sortie du câblé de ladite tête de câblage un triangle rectangle, dont le grand côté de l'angle droit est situé sensiblement selon l'axe de rotation de ladite tête, le point de câblage des deux fils élémentaires étant stabilisé sur ce côté en un point intermédiaire entre les deux extrémités.Such a result is obtained in accordance with the invention by producing a wiring head in the form of a removable assembly, which can be mounted on the support frame of the machine by means of a bearing allowing it to be driven in rotation. , said assembly essentially comprising a body of generally cylindrical shape, having on its height a window through which the faces are parallel to the generator of said cylinder, and which comprises at its free end a circular plate of larger dimension supporting two guide eyelets:

• one close to its peripheral edge and inside which passes the wire forming the balloon and which drives the whole in rotation during the formation of the cable,
• the other, placed close to or coincident with the axis of rotation of the assembly, and inside which passes the second wire coming from the supply coil mounted inside the spindle cup,

these two eyelets defining with the entry of the cable outlet channel of said wiring head a right triangle, the long side of the right angle of which is situated substantially along the axis of rotation of said head, the wiring point of the two elementary wires being stabilized on this side at an intermediate point between the two ends.

Within the meaning of the present invention, the expression "right triangle" denotes both a true right triangle and a triangle whose angle at the top is not strictly equal to 90 °, but close to such an angle.

Such a particularly simple design assembly can be used either such that, the wiring point of the wires being kept stable inside the window or open chamber of the cylindrical body, and this substantially halfway up the latter, or be fitted with a caster having two guide grooves for the elementary wires, said caster then being preferably mounted eclipsable inside the aforementioned chamber and the wiring point then being located between the inlet of the outlet channel and said roulette.

Furthermore, thanks to the invention, it is also possible to produce compact assemblies, assemblies which will be designated by the expression "regulating assemblies" which combine, on the one hand, the means of regulating the tension of the thread coming from the coil disposed inside the pot of the double twist spindle and, on the other hand, said wiring head (or length regulator) according to the invention and which allows the two elementary wires to be united. In such an integrated assembly, the wiring head according to the invention is then mounted free to rotate directly on the housing of the spindle output tensioner, coaxially with the latter, by means of a fixed bearing, the base secured to said case of the tensioner, is in the form of a disc against the periphery of which the balloon of the outer wire rests, the eyelet holder plate of the length regulator possibly comprising a base or skirt surrounding the fixed support bearing on his height.

To produce such a regulation assembly comprising both a length regulator in accordance with the invention and a voltage regulator, use will be made, for example, of producing the latter element (voltage regulator), an assembly of the type which is the subject of European patent 409,743, the length regulator produced in accordance with the invention then being adapted so as to be able to be mounted free in rotation on a support bearing fixed to the housing of said voltage regulator.

• la figure 1 illustre, comme vu précédemment, l'ensemble d'une machine de câblage constituant l'état de la technique, tel que décrit dans le FR-A-2 565 261 (correspondant à l'US-4 592 195) et qui comporte une tête de câblage (ou régulateur) à roulettes, et dont l'entraînement en rotation est obtenu par le ballon formé par l'un des deux fils destinés à former le câblé ;
• les figures 2, 2a et 2b sont des vues de détail d'un mode de réalisation d'une tête de câblage (ou régulateur de longueur) réalisé conformément à l'invention, et dans laquelle la liaison entre les deux fils élémentaires est réalisée sans présence de roulettes de guidage ;
• les figures 3, 3a, 3b et 4, 4a,4b,4c illustrent deux modes de réalisation d'une tête de câblage (ou régulateur de longueur) conforme à l'invention, équipée d'une roulette de guidage pour les fils élémentaires ;
• les figures 5 et 6 illustrent un mode de réalisation d'un ensemble intégré comportant une tête de câblage conforme à l'invention monté directement sur un régulateur de longueur (ou tendeur) pour le fil provenant de la bobine disposée à l'intérieur du pot de la broche double torsion.

The invention and the advantages which it provides will however be better understood thanks to the exemplary embodiments given below by way of indication, but not limitation, and which are illustrated by the appended diagrams in which:

• FIG. 1 illustrates, as seen previously, the assembly of a wiring machine constituting the state of the art, as described in FR-A-2 565 261 (corresponding to US-4 592 195) and which has a head of wiring (or regulator) on casters, and the rotary drive of which is obtained by the balloon formed by one of the two wires intended to form the cable;
• Figures 2, 2a and 2b are detailed views of an embodiment of a wiring head (or length regulator) produced in accordance with the invention, and in which the connection between the two elementary wires is carried out without presence of guide rollers;
• Figures 3, 3a, 3b and 4, 4a, 4b, 4c illustrate two embodiments of a wiring head (or length regulator) according to the invention, equipped with a guide wheel for the elementary son;
• Figures 5 and 6 illustrate an embodiment of an integrated assembly comprising a wiring head according to the invention mounted directly on a length regulator (or tensioner) for the wire from the spool disposed inside the pot of the double twist spindle.

The invention relates, as said previously, to an improvement made to the wiring heads (or regulators) used on the machines of the type illustrated in FIG. 1 and the general structure of which has been detailed previously and will therefore not be repeated at this stage. of the description, the same references as those used previously being used to designate the same elements.

In the three exemplary embodiments illustrated in FIGS. 2, 3 and 4, the wiring head proper designated by the general reference (7) is mounted on the support frame (20) of the machine (shown diagrammatically only in FIG. 3) by by means of a bearing (12) enabling it to rotate, in normal operation, directly through the balloon (1a) of the wire (1). This assembly is carried out by placing the hollow shaft (21) for the outlet of the formed cable (8) inside the bearing (12) by means of bearings (22).

As can be seen from the attached diagrams, the wiring head (7) is designed so that it can be removably mounted inside the bearing (12).

In the three illustrated embodiments, the removable assembly constituting the actual wiring head (7) essentially comprises a body (25) of generally cylindrical shape and which has at its height a window (26) whose faces (27a , 27b) are parallel to the generator of said cylinder (25). This cylindrical body (25) is extended at its free end by a larger circular plate (27), this plate may have a bevelled face as illustrated in FIGS. 2 and 4, or simply be flat as shown in FIG. 3 .

Such an assembly (7) will preferably be produced by molding a plastic or other material, making it possible to produce the light assembly so as to reduce inertia as much as possible.

As can be seen from the appended diagrams, the end plate (27) supports two guide eyelets (28,29). The eyelet (28) is disposed near the peripheral edge of said plate (27) and serves as a guide element for the wire (1) which forms the balloon (1a) and makes it possible to drive the assembly in rotation during cable formation (8). The second eyelet (29) is, for its part, either coincident with the axis of rotation of the assembly (example illustrated by Figures 2, 2a and 2b), or slightly offset from said axis in the case where such together is associated with a guide roller for the two wires to be assembled, as illustrated in the two embodiments (FIGS. 3, 3a, 3b and FIGS. 4, 4a, 4b, 4c), the second wire (2) coming from the supply coil (21) mounted inside the bowl of the spindle being brought inside this guide eyelet (29).

These two eyelets (28,29) define with the inlet orifice (30) of the outlet channel (31) of the cable (8), a right triangle or substantially right triangle.

With such a device as illustrated in FIGS. 2, 2a and 2b, it is possible to wire the two elementary wires (1) and (2) without using a guide roller, the two wires being joined at the wiring point. (33) which is arranged substantially along the axis of rotation of said head, and halfway up the window (26) which it comprises. Such an embodiment which involves delivering the wires (1) and (2) under very precise voltages, is however very advantageous for carrying out the wiring of fragile wires, in particular of rayon wires, since said wires undergo practically no interference. nor friction during their displacement.

Furthermore, such an assembly can, if it is desirable, be easily associated with a caster comprising two guide grooves for the two elementary wires (1) and (2) as is apparent from the examples illustrated in FIGS. 3 and 4.

In the embodiment illustrated in FIGS. 3, 3a and 3b, the guide roller (40) is mounted inside the open window (26) by means of an axis (41) allowing it is freely rotated. Preferably, the axle (41) is made up of elements making it possible to easily mount and dismount said caster (40).

Furthermore, the eyelet (29) for guiding the wire (2) is, relative to the positioning of the eyelet as illustrated in FIG. 2, slightly offset relative to the axis of rotation of the assembly .

On the one hand, such a design has the advantage of having a guide roller (40) trapped inside the window, which limits any risk of the wire escaping when stopping from a position. during its operation. Furthermore, the slight offset of the guide eyelet (29) relative to the axis of rotation, allows the wire (2) to form a spindle (as shown diagrammatically in FIG. 3a), which limits the risk of winding of the wire (1) around the wire (2), in particular when starting a position.

Finally, the two grooves of the caster (40) being close to each other, the wiring point (33) of the wires is stabilized in an intermediate zone between the periphery of the caster (40) and the inlet (30) of the outlet channel of the cable formed.

Figures 4, 4a, 4b and 4c illustrate a variant of such a device which allows for easy installation and removal of the wheel (40) inside the window (26) that includes the assembly (7). In this embodiment and as can be seen more particularly from FIGS. 4a and 4c, said roller (40) comprises an axis (41) consisting of two elementary parts which can be brought together and which are subjected to the action of an internal spring. Consequently, to put the caster back in place, it suffices to push back the two extreme edges of said axis (41), the two ends coming automatically to be embedded in lateral openings (42a, 42b) provided on the walls. of the window and, to remove said roller, it suffices to carry out the reverse operation. Furthermore, in this embodiment, the eyelet (29) is mounted at the lower part of the assembly (7) so as to be able to be moved towards or away from the axis of rotation.

• mise en place et enlèvement facile de la roulette de guidage du fil ;
• facilité de nettoyage,
• positionnement aisé des fils (1) et (2) à câbler par le fait que les roulettes sont "éclipsables", un tel "éclipsage" permettant l'enroulement de un ou plusieurs tours de fils à câbler dans leur gorge respective avec une très grande aisance.

Such a set has many advantages, such as:

• easy positioning and removal of the wire guide roller;
• ease of cleaning,
• easy positioning of the wires (1) and (2) to be wired by the fact that the rollers are "eclipsable", such "eclipsing" allowing the winding of one or more turns of wires to be wired in their respective grooves with a very large ease.

Furthermore, such a regulator assembly (7) according to the invention can be easily adapted to be combined with the tensioning element (6) for the wire (2) coming from the spindle contained inside the pot (3). of the double twist spindle as shown in the embodiment illustrated in FIGS. 5 and 6.

As can be seen from these figures, such an integrated assembly comprises the two assemblies (6,7) (voltage regulator and length regulator), the regulator (7) being mounted, by means of the housing (120) of the 'tensioning element (6) directly on the cover (3c) of the double twist spindle (3), this cover and this spindle not being shown in Figures 5 and 6.

In such an integrated assembly, the voltage regulator (6) is produced in accordance with the teachings of European patent 409 743 and will therefore not be described in detail.

The mounting of the length regulator (7) according to the invention is carried out, in this particular embodiment, by means of a bushing or bearing, also designated by the reference (12), of generally cylindrical shape and which has a base (122) which serves as a junction with the upper surface (120a) of the housing (120). This base (122) is in the form of a disc against the periphery of which can support the balloon (1a) of the wire (1) (see Figure 6).

As said previously, the wiring head (7) has a structure similar to that which is the subject of FIGS. 2 to 4c, except that its structure is adapted so that it can be mounted to rotate freely on the bearing. (12). To do this, it comprises, below the plate (27) which supports the guide eyelets (28,29) for the two elementary wires (1,2), a hollow pin (124) mounted by means of bearings ( 22) inside the cylindrical bearing (12). Furthermore, a cylindrical surface or skirt (126) is also provided below the crown (27), and surrounds the cylindrical bearing (12) over its entire height.

Thanks to such a particularly simple design assembly which can be mounted directly on the spindle, it is possible to obtain perfect alignment of the axis of the regulation assembly with the axis of said spindle.

Furthermore, such an embodiment makes it possible to eliminate the multiple height, parallelism and alignment adjustments that conventional mounting requires. Indeed, such an assembly integrates the optimal distance (A) (see FIG. 6) between the plate (122) which not only serves as a junction element between the two elements, but also makes it possible to guide the balloon ( 1a) of the wire (1) and the upper plate (27) which supports the guide eyelets (28,29) for both elementary wires (1,2), which makes it possible to avoid any human adjustment error and guarantee an optimal starting of the length regulator of the wire (1) of the balloon (1a) and to optimize the interferences imposed on the wire.

Furthermore, such a particularly compact regulating assembly makes it possible to protect the wire (2) of the pot, and prevents untimely breakage of the elementary wires (1) and (2) at start-up. Indeed, the design of the length regulator (7) and more particularly the presence of the rotating "skirt" (126) which surrounds the bearing (12) over its height, makes it possible to produce a reserve of wire on this rotating part (126 ), which facilitates the start of cable production, and absorbs any voltage shocks during production.

Such an assembly also makes it possible to reduce the imbalances caused by the rotating masses, and also contributes to a lowering of vibrations and noise pollution of the whole machine.

Of course, the invention is not limited to such an exemplary embodiment, but it covers all the variants produced in the same spirit. Thus, if the skirt (126) is preferably cylindrical, it could be envisaged to have a skirt (126) of conical shape.

Claims (4)

1 / Wire wiring machine (1,2) comprising a regulating device or wiring head (7), in which each working position consists of a DT assembly similar to a double twist spindle reel making it possible to join together by twisting two elementary wires (1,2), one of the wires (1) forming a balloon (1a) which surrounds the bowl (3b) inside which is the coil (4) of the second wire, and the two wires (1) and (2) being assembled on a wiring head or regulator (7), constituted by a rotating assembly mounted in a bearing (12) and whose axis of rotation coincides with that of the spindle (3) , characterized in that said assembly (7) essentially comprises a body (25) of generally cylindrical shape which has at its height a through window (26), the faces (27a) and (27b) of which are parallel to the generator of said cylinder (25), this body being extended at its free end by a circular plate (27) of larger dimension, and which supports two guide eyelets (28,29): - one (28), close to its peripheral edge and inside which passes the wire (1) forming the balloon (1a) and which drives the assembly in rotation during the formation of the cable (8); - the other (29), disposed near or coincident with the axis of rotation of the assembly, and inside which passes the second wire (2) coming from the supply coil (4) mounted at the '' inside the bowl (3) of the spindle, these two eyelets (28,29) defining with the inlet (30) of the cable outlet channel (8) of said wiring head a right triangle (or substantially right), the long side of the right angle is located substantially along the axis of rotation of said head, the wiring point (33) of the two elementary wires (1,2) being stabilized on this side at an intermediate point between its two ends (29,30). 2 / Machine according to claim 1, characterized in that a guide roller (40) for the two elementary son (1,2), is mounted inside the open window (26) of the body (25) by by means of an axis (41) allowing it to be driven freely in rotation, said axis (41) consisting of elements making it possible to easily assemble and disassemble said roller (40), and the guide eyelet (29) for the wire (2) being slightly offset from the axis of rotation of the assembly. 3 / Machine according to claim 2, characterized in that the roller (40) is mounted on the body (25) via an axis (41) consisting of two elementary parts which can be brought together one of the other and which are subject to the action of an internal spring. 4 / Machine according to one of claims 1 to 3, characterized in that the wiring head or length regulator (7) is mounted for free rotation directly on the housing (120) of the output tensioner (6) of the spindle , coaxial with the latter, by means of a cylindrical fixed bearing (12) whose base (122) fixed to said housing (120) of the tensioner (6), is in the form of a disc against the periphery of which is supported by the balloon (1a) of the outer wire, the eyelet holder plate (27) of the length regulator (7) comprising a base or skirt (126) surrounding at its height the fixed support bearing (12).

Images