EP0003385B1 - Continuously operating dual winding machine - Google Patents

Description

The subject of the present invention is a double winder with continuous operation comprising two supports for spools of parallel axes provided with hook disks situated in the same plane, a cutting device moving back and forth perpendicularly to said plane, a device transfer device intended to modify the path of the wire so as to pass it in the vicinity of the barrel of the empty reel and of said plane at the time of transfer and a deflecting device cooperating with the transfer device, and intended to engage the wire in the path of the hooks associated with the empty coil.

Winders of this kind are already known. For them to work under conditions of maximum productivity, it is essential that the winding can be carried out at high speed and that the transfer of the wire from the full reel to the empty reel at the end of the filling of each reel takes place as simple and rational as possible so that these operations can be automated without difficulty and without risk about the reliability and regularity of the operations. It is also essential that during all these operations the wire does not undergo undue stress risking breaking it. Indeed, any wire breakage causes delays which disturb the operation of the installations located upstream of the winder.

A particularly delicate operation in the series of maneuvers which constitute the transfer is the attachment of the wire by the hooks associated with the empty spool. In winders of the kind mentioned above, with parallel spools, the two hook discs are located in the same plane, so that the thread must be deflected along a path forming a double bend at the time of transfer in order to avoid hooks associated with the full reel while passing in the path of the hooks associated with the empty reel.

A known winder (German DOS 23 04 483) of the kind mentioned above, comprises as a transfer device a frame pivoting about an axis parallel to the axes of the coils and equidistant therefrom. This frame carries the cutting device which is constituted by two parallel shafts each carrying a movable pulley back and forth each on its shaft. At the time of transfer, the path of the wire passes in the vicinity of the plane in which the hooks of the coil supports are located, so that the function of the deflector is to separate the wire from the hooks of the full coil while engaging it in the hook path of the empty reel. To perform this function, the aforementioned document provides for the use of two threaded shafts movable in rotation each carrying a movable nut by rotation of the shaft. Each nut carries a deflection bar. To achieve the desired function, it is necessary to move, at the desired time, the two bars of the diverter, which requires synchronization of the control means.

Other known deflecting devices also include members which must be controlled so as to perform various movements. Thus, German DOS 1 955 246 describes several deflection devices which comprise either two vertical thread-pushing bars moving parallel to the median axis of the machine under the effect of jacks, or a vertical bar and two horizontal bars controlled independently. at the time of transfer.

In German DOS 1 959 377, it is intended to use as a deflection device vertical thread pushers controlled by jacks and as a wire breaking device, electrodes capable of burning it.

Patent FR 2 274 537 provides as a deflecting device, on the one hand, a vertical retaining rod secured to a horizontal lever which pivots so as to bring said rod close to the hook-carrying disc associated with the full reel and, on the other hand, a meeting body which moves parallel to the axes of the coils. Here too these two components must be ordered separately.

US Pat. No. 3,693,528 also describes a diverter device of complex construction. This device comprises a pivoting base fitted with two twin bars extending vertically, but it also comprises two vertical wire pushers moving parallel to the axis of the spools and which are controlled alternately. The wire is deflected by one of the twin bars of the swivel plate and by one of the wire pushers mounted on jacks.

However, the production of deflecting devices which include the displacement of several separately controlled members poses adjustment and adjustment problems which, given the risks of wire breakage, are difficult to solve. It suffices that the pinching pressure or the tensile force which the wire undergoes between two separately controlled members is a little higher than normal so that vibrations resulting therefrom result. On the other hand, even in the absence of breakage, the permanent deformations that the wire can undergo, for example if it is a plastic-insulated wire, represent serious drawbacks.

The object of the present invention is therefore to improve the reliability of double winders of the kind mentioned at the start, by simplifying the arrangement of the deflection devices, as well as their control and the general control of transfer operations.

For this purpose, the winding machine according to the invention is characterized in that the deflection device consists exclusively of a base which is mobile in rotation about a parallel axis, to said plane and located in the vicinity thereof, by two rigid and elongated elements fixed in twin positions on the base, and by means of rotation drive, in that said means of rotation drive are associated with means of control of the transfer device and act on the base so that at the time of transfer, the latter performs a rotation by a predetermined angle, while the path of the wire engages between said rigid elements, the rotation of the deflector occurring in a direction such that the trajectory of the wire is moved away from the hooks associated with the full reel and brought closer to the hooks associated with the empty reel.

By the fact that the deflector is a one-piece member, its control is simplified and the above-mentioned difficulties are eliminated. In addition, as the wire engages between the twin elements of the deflector while the latter rotates, the functions of these elements are preserved. One of them releases the wire from the hook area and the other engages it in this area. Preferably, it is with this second element that the knife will be associated.

• la fig. 1 est une vue élévation latérale schématique de l'ensemble du bobinoir,
• la fig. 2 une vue en plan de dessus, le carter des moyens d'entraînement étant partiellement arraché,
• la fig. 3 une vue en coupe partielle selon la ligne III-III de la fig. 2,
• la fig. 4 une vue en plan de dessus partielle montrant les moyens de transfert en position de repos, et
• la fig. 5 une vue analoque à la fig. 4 montrant les moyens de transfert dans une des positions de transfert.

An embodiment of the winding machine according to the invention will be described below, by way of example, with reference to the attached drawing, in which:

• fig. 1 is a schematic side elevation view of the entire winding machine,
• fig. 2 a top plan view, the casing of the drive means being partially torn off,
• fig. 3 a partial sectional view along line III-III of FIG. 2,
• fig. 4 a partial top plan view showing the transfer means in the rest position, and
• fig. 5 a similar view to FIG. 4 showing the transfer means in one of the transfer positions.

Figs. 1 and 2 _i show the general arrangement of the machine. The frame 1 carries drive and support means for two coils 2 and 3 of parallel axes, on which a wire 4 is wound alternately. Each coil support comprises a shaft 5 (fig. 2) carried by two bearings and rotational drive means 6 which will not be detailed here, but comprise for each shaft a gear motor and a control device ensuring a winding at constant speed. The shafts 5 carry at their end projecting from the frame 1 each a disc 7 provided at its periphery with hooks 41. The outer end of each shaft 5 also includes mounting means for one of the coils 2 or 3. These means mounting extend in overhang, so that access to the machine from the side of the front face seen in FIG. 1 is free.

At the upper part of the frame is mounted a cutting support 8 also fixed in overhang and comprising two parallel guide bars 9 and a control screw 10 which is coupled at 11 to a rotary drive element 12 itself. - even actuated by a motor (not shown) comprising means for reversing its direction of travel. The screw 10 rotates the cutting trolley 13 back and forth over the entire axial length of the coils, so that the cutting pulley 14, mounted on the side of the carriage 13, also travels the entire length of the coils alternately in one direction e1 in the other. It will be noted that the cutting pulley 14 is tangent to a vertical plane parallel to the axes of the coils 2 and 3 and located at equal distance between these axes. This vertical plane called hereinafter, the median plane of the machine; is indeed a plane of symmetry for the operation of the transfer means.

The wire 4 which is wound alternately on one and the other of the coils 2 and 3 comes either from a supply coil, or from an extrusion line, or from another installation. To allow regular winding and to prevent any variations in speed from going upstream; the winder is equipped with an accumulator 15 shown diagrammatically in FIG. 1. This accumulator comprises a pulley 16 mounted on a vertical arm 17 capable of pivoting with respect to the axis 18. This arm will be stressed by elastic elements so as to ensure that the tension on the wire 4 during the winding is approximately constant . The accumulator 15 also acts as a withdrawer. Thus, the pulley 19 is integral with a drive shaft 20 which is coupled to a motor 21.

Note that the support means of the cutting device are fixed, which already represents a simplification compared to winders of the same kind used until now, in which the cutting device is generally associated with the transfer means and comes place in the vicinity of the coil which is being filled. In the winder shown in the drawing, the transfer means are constituted by a tilting assembly generally designated by 22 and by a diverter 23 (fig. 3). The tilting element essentially comprises an upright 24 which is normally in a vertical position. It is carried at its lower end by a horizontal shaft 25 parallel to the axes of the coils and located in the median plane previously mentioned. To maintain it in a vertical position, a locking member 26 provided with a handle 27 and a rod 28 urged by a spring is provided in the vicinity of its upper end. The end of this rod engages in a hole provided in the stationary assembly 29. The latter essentially consists of welded sheets and carries the transfer means. It is fixed by its base against the front face of the frame 1 as seen in FIG. 3. It also carries the diverter 23 which will be discussed later. The shaft 25 extends to the left (fig. 3) inside the frame and carries at its end limit switch contacts (not shown).

At its upper end, the upright 24 carries a transverse bar 30 to which are fixed two fixed shafts 31 extending in overhang parallel to the median plane. These shafts 31 each support a wire guide consisting of a diabolo 32 and a cylindrical drum 33. These two elements rotate freely on the shaft 31 independently of one another and the diameter of the drum 33 is equal to outside diameter of the diabolo. Axially, the positions of elements 31 and 32 are fixed by stops so that the dolly and the drum can rotate at different speeds and avoid the effects of inertia. The profile of the drum is engaged at its end on the dolly to ensure the passage of the wire from one to the other smoothly during the transfer. The drum extends over approximately 4/5 of the length of the coils while the diabolo is located in the vicinity of the cheek closest to the hook disc 7.-the wire guides formed by each drum 33 and the corresponding diabolo 32 embrace the wire 4 and more precisely the part of this wire which extends between the cutting pulley 14 and the spool on which the wire is wound. When, for example the reel 2 (fig. 1) is full, the transfer operation is controlled by moving the tilting assembly 22 from the position shown in solid lines or normal position, in the position shown in phantom where it is tilted to the left, the upright 24 abuts on one of the oblique spacers 34 of the base carrying the. landing of the crew 22. As can be seen in FIG. 1, the wire is then brought into a position where it is tangent to the barrel of the empty reel 3, and it can be understood that if the tilting crew is then brought back to the middle position after the wire has been hooked by the disc associated with the coil 3 which rotates in the direction of arrow A, the winding on the coil 3 will take place symmetrically with respect to the winding of the coil 2 which rotates in the direction of arrow B. The displacement of the crew tilting to the right will operate the transfer symmetrically, from the coil 3 assumed to be full to the coil 2 assumed to be empty.

It remains to describe the operation of the deflector 23 which is essential for the attachment of the wire. As seen in fig. 3, this deflector comprises a vertical shaft 35 which pivots on the fixed assembly 29, a horizontal disc 36 integral with the shaft 35, two twin vertical bars 37, of cylindrical section diametrically opposite with respect to the axis of the disc 35 and which extend upwards. a level slightly higher than the axis of the coils, the upper ends of the bars 37 being slightly bent in divergent directions. Finally, the diverter 23 also includes a knife 39 secured to the disc 36 and whose blade is vertical, the edge being tangential to the disc 36. The diverter 23 is coupled to the shaft 25 of the tilting crew by a gear of angle 38, so that by pivoting approximately 45 ° from the normal position to the left, the tilting assembly causes the deflector 23 to pivot in a clockwise direction by a determined angle between 90 and 180 °, from the normal position as it is visible in fig. 4 where the two bars 37 are located substantially in the median plane up to, for example, the position of FIG. 5 where each of the bars 37 has rotated approximately 135 °, the knife 39 having come to be placed in the position oriented upwards and to the left.

The displacement of the transfer means brings about a cutting of the wire between the two coils and the attachment of the end attached to the production line on the disk associated with the empty coil. An oblique ramp 40, constituted by a cylindrical bar is fixed to the support 29 in an oblique position and in the median plane. Its lower end is folded vertically and engages between the upper ends of the bars 37.

Referring to fig. 3, 4 and 5, we can see how the hooking and cutting of the wire is carried out. If the thread guide 33, 32 located on the right side in fig. 4 is moved to the left as a result of the tilting of the crew 22, while the cutting pulley 14 makes its last movement towards the discs 7, the wire is hooked first by the drum 33, then is transferred to the diabolo 32. During the tilting, it takes an increasingly inclined position, so that it comes into contact with the ramp 40 which introduces it between the bars 37. These are turning in the direction of watch hands around the vertical axis of the deflector 23, so that the wire is kept apart from the hook disc 7 associated with the full spool, but is led obliquely so as to pass in the path of the hook 40 fixed to the disc 7 associated with the empty spool 3. This hook hooks the wire and drives it in rotation around the barrel of the empty spool while moving it downwards. It therefore comes into contact with the horizontal edge of the knife 39 and is sectioned there. It therefore suffices to return the tilting assembly 22 to its normal position.

The full spool 2 can then be stopped and separated from the spool holder, then replaced by an empty spool. All of the transfer means are arranged so as not to hinder in any way access to the spool support, which facilitates the service of the machine. In addition, these transfer means are fully supported by the base 29, so that they can be assembled and disassembled as a unit in one piece. This latter feature also constitutes one of the advantages of the device described.

Of course, while a machine has been described above in which the transfer is controlled and carried out by hand, the tilting of the upright 24 being controlled by the handle 27, it is also possible to provide the winder with means auto control materials linked to the control means which drive the shafts of the coils and, where appropriate, the loading and unloading devices.

These automatic control means could detect the end of filling of the full reel, or operate under the effect of a command of another type. While the cutting device moves the wire so as to form the last layer of the spool from the cheek opposite the hook disc towards the cheek located on the side of this disc, they control the tilting of the upright 24 from the middle position shown. in fig. 1 in solid lines towards the extreme position located on the side of the empty reel. At the same time, the deflector is rotated as described above, so that when the thread guide 33 over which the thread passes brings the latter into a position close to the drum of the spool, it is hooked by the hooks associated with the empty coil but avoids those associated with the full coil. The rotary drive of this spool causes the wire to be cut on the knife 39 after which the tilting assembly is returned to its middle position, the full spool is stopped and discharged automatically so that it can be replaced by an empty spool whose rotation will start shortly before the start of the next transfer operation.

The automatic control of these operations is particularly simple in the winder described since the deflector is a one-piece piece kinematically linked to the tilting assembly, so that a single command is sufficient for all these operations.

Claims (12)

1. Continuous-operation double winding machine comprising two supports (5) for parallel-axis reels (2, 3) provided with discs (7) having hooks (41) situated in the same plane, a traverse mechanism (13) reciprocating perpendicular to the said plane, a transfer device (22) intended to modify the trajectory of the wire to cause the wire to pass in the vicinity of the drum of the empty reel and of the said plane at the moment of transfer, and a deviator device (23) cooperating with the transfer device, and intended to engage the wire in the path of the hooks associated with the empty reel, characterized in that the deviator device is constituted exclusively by a base (36) rotatable about an axis parallel to the said plane and situated in the vicinity thereof, by two rigid and elongated elements (37) fixed in paired positions on the base, and by rotational drive means (38), in that the said rotational drive means are associated with control means (25, 26, 27) for the transfer device and act upon the base in such a way that at the moment of transfer, the latter rotates through a predetermined angle, when the trajectory of the wire engages between the said rigid elements, the rotation of the deviator occurring in a direction such that the trajectory of the wire is moved away from the hooks associated with the full reel and brought near the hooks associated with the empty reel.

2. Winding machine according to claim 1, characterized in that the transfer device (22) comprises two guide parts (33) parallel to the axes of the reels and between which the wire is engaged, and a movable support (24) bearing the said guide parts, and in that the said control means (25, 26, 27) are arranged so as to shift the support (24) from a central position in which the guide parts (33) are equidistant from the reels to an end position situated beyond the empty reel so as to cause the trajectory of the wire to undergo the said modification.

3. Winding machine according to claim 2, characterized in that the movable support (24) bearing the guide parts (33) comprises an upright provided with a transverse bar on which the said guide parts (33) are overhangingly disposed, and in that the said upright pivots on a shaft (25) parallel to the axes of the reels and situated at an equal distance from the latter.

4. Winding machine according to claim 1, characterized in that the said rigid elements of the deviator (37) are cylindrical bars parallel to the said pivoting axis, fixed at one end to the base (36), their other ends being free and extending obliquely in divergent directions.

5. Winding machine according to claim 4, characterized in that the base is situated at a lower level than the plane defined by the axes of the reels, and in that the said bars extend up to a higher level than the said plane.

6. Winding machine according to claim 1, characterized in that the base of the deviator bears a knife (39), the cutting edge of which is parallel to the said plane and is in the vicinity of one of the said rigid elements.

7. Winding machine according to claim 1, characterized in that each guide part is constituted of a cylindrical drum (33) and of a diabolo (32) mounted at the end of the drum coaxially therewith.

8. Winding machine according to claim 2, characterized in that the support (24) of the guide means is kinematically linked to the deviator (23) so as to cause it to pivot about its axis upon each rocking movement of the support.

9. Winding machine according to claim 8, characterized in that the said kinematic linkage is arranged so that the deviator pivots through a specific angle of between 90° and 180° when the support of the guide means rocks from a median position towards one or the other of its end positions.

10. Winding machine according to claim 8, characterized in that the said kinematic linkage is a linkage by means of gearing.

11. Winding machine according to claims 2 and 4, characterized in that it further comprises a fixed guide element (40) extending obliquely in a plane parallel to the axes of the reels and perpendicular to the plane defined by these axes so as to cause the forced engagement of the wire between the said rigid elements (37) at the time of a rocking movement of the guide means between a median position and one or the other of the end positions.

12. Winding machine according to any one of the preceding claims, characterized in that it is equipped with an automatic control device which, at the end of the filling of the full reel, controls the shifting of the transfer device (22) from a median position towards the end position embracing the empty reel and a simultaneous rotation of the deviator (23) while the traverse mechanism (13) lays down the last layer of wire on the full reel while moving towards the hook- disc (7) associated with this reel, then the stopping of the full reel, its unloading, and the return of the transfer device to the median position.

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