EP0875476A1 - Winder with two mandrels for winding a web - Google Patents

Abstract

The winder has at least two rotary mandrels, each carried by a frame which allows them both to be placed in turn in a first position where winding is started and a second position where winding is completed and the mandrel is removed. The winder incorporates a permanent support for the end of each mandrel opposite the frame as it travels from the first position to the second. The support is in the form of a rotary member which rests on a fixed support (12). As each full mandrel is removed from the winder it is replaced by an empty one and the process is continued.

Description

The subject of the invention is a carousel winder for winding a product in a band on one or the other at least two winding mandrels.

Tape production facilities metallic generally include several sections having different functions, such as hot rolling, pickling, cold rolling, and finishing.

Even if, in some cases, we can group some sections it is usually necessary wind the tape in a reel, at the end of a section, to transport it to the next section.

For this purpose, a winder is used comprising a mandrel consisting of a shaft rotated around its axis and on which can be fixed, removably, the end of the strip. By rotation of the mandrel around its axis, we wrap the strip on the mandrel, in turns superimposed, until a coil is formed.

Most often, the mandrel extends overhang from a frame carrying the drive means in rotation of the mandrel and is provided with a system allowing shrink it to allow removal of the spool.

Generally, the strip is kept under tension to tighten the turns. When the coil reaches the desired diameter, corresponding to a certain strip length, it is removed from the mandrel.

After removing the coil, we arrive on the mandrel the end of the next strip and the operation can start again.

Removing the fully wound reel and start of winding of the next reel imposes a time death whose duration one seeks to reduce. Indeed, it is better not to stop the tape running in the processing installation preceding the winder and is therefore led to associate it with a system of accumulation whose capacity depends on dead time required for coil change.

To reduce this dead time, we therefore proposed to use a so-called "carousel winder" installation, comprising a rotating chassis, rotatably mounted around a central axis on a fixed frame, and on which are fixed to minus two mandrels which extend in overhang on one same side of the chassis from a recessed end. Each mandrel can be rotated around its axis which is parallel to the central axis.

By orienting the rotating frame, you can place each of the chucks in at least two positions successive. In a first starting position of the winding, the end of the strip is fixed on the mandrel and we control the rotation of it to wind the strip over a number of turns. Then, by rotating the rotating chassis, we bring the first mandrel being wound up in a second position allowing the complete winding of the strip. At the same time, by the rotation of the rotating chassis, the second mandrel comes stand by in the first starting position.

So when the desired length of tape has been wound on the first mandrel, it is cut along a shear line perpendicular to the direction of travel and the ends of the strip placed upstream of this shear line which is the head of the next band, maybe immediately attached to the second mandrel in position waiting so as to start winding the tape next during the time required to unload the fully wound coil.

The first mandrel is then released and can return, by rotation of the chassis, in the first position of start-up. At the same time, the second mandrel, on which have been wound the first turns, is placed in the complete winding position.

Such a so-called "carousel" winder therefore allows significantly reduce downtime.

Of course, other arrangements are possible and, for example, the winder could include three mandrels placed successively, by rotation of the chassis, in a first start position, a second full winding position and a third position of unloading.

As noted, each mandrel expands, normally, cantilevered, from the rotating chassis so as to allow the withdrawal of the wound coil by axial sliding towards the side opposite to the chassis. However, the coil being very heavy, it is preferable, during winding that the opposite end of the mandrel to the chassis rests on a removable counter bearing.

In single-core winders, the counter bearing is simply placed on an erasable support forming a chair resting on the ground or on part of the frame fixed.

At the end of the winding, the support chair is away from the mandrel to allow removal of the spool. In carousel winders, you can also use a removable counter-bearing mounted on a chair support which is arranged in the winding position complete, so as to support the mandrel until the end of winding, i.e. when the coil is the most heavy. On the other hand, the mandrel being in the position is generally left free and its end embedded in the rotating frame is subjected to forces important due to the weight of the coil which increases gradually and, in addition, to the tensile force which must be modulated according to the diameter and is particularly important at the start of winding.

Of course, it would be possible to associate a second mandrel support chair in position startup but such a device would be quite bulky and, in any case, would not constitute a support for the mandrel that for the winding of the first turns, the mandrel remaining cantilevered during its rotation from the start position to full winding position.

The object of the invention is to remedy these disadvantages thanks to a new provision allowing support the mandrel in all positions and even during the rotation of the rotating chassis.

The invention therefore generally applies to a carousel winder comprising a rotating chassis rotatably mounted around a central axis on a fixed frame, at at least two mandrels rotatably mounted on the rotating chassis, each around an eccentric axis parallel to the central axis and extending in overhang on the same side of the chassis turning from a mounting end on the chassis to an opposite end, means of selective control of the rotation of one or other of the mandrels around its axis, and means for controlling the rotation of the chassis rotating around its central axis, to selective placement of a first mandrel winding in a first starting position of winding and then the passage of said winding mandrel the first position to at least a second position complete winding and unloading of the reel, with simultaneous return of the second mandrel discharged from said second position to first position.

According to the invention, the winder comprises a permanent support device from the end opposite to rotating frame of the shaft of each winding mandrel, from the first start position to the position complete winding, said support member comprising at less a removable rotary support member of said end opposite of the winding mandrel, resting on the frame fixed by means of mounted support means rotating with the chassis rotating around the central axis of the latter, and control means, respectively, for the engagement of the support member on the end of the mandrel in the first starting position and up to the second position for complete winding and release of the support member with spacing of the support means in a third position sufficiently distant from the mandrel to allow unloading of the wound coil.

Particularly advantageously, the means of support of the removable support member comprise at least one support arm supported, at a distance greater than the width of a spool, on one end of at least one support rod bearing at its other end in the chassis rotating and extending in one direction parallel to the central axis, the support arm being articulated on said support rod around an axis, so that it can pivot between the engagement position of the support member on the end of the mandrel and the spread position allowing unloading the wound coil.

The articulation axis of the support arm can be perpendicular to the central axis, the support arm coming then place yourself in a plane substantially parallel to this axis, in the unloading position.

But the axis of articulation can also be parallel to the central axis, the support arm then being offset angularly with respect to the mandrels so that the organ support is far enough away from said mandrels to not not hinder the discharge of a coil completely rolled up.

In a first embodiment, the arm of support is articulated on a single rod forming a tree support centered on the central axis of rotation of the chassis turning. In this case, the central support shaft can advantageously be rotatably mounted around the axis on said rotating chassis with possibility of angular sliding, the winder comprising means for applying to the shaft of support, of a torque around the central axis adjusted to compensate for the weight of the current reel of winding and the torque resulting from the traction exerted on the tape, so that the resultant of the whole forces applied to the support arm by the mandrel during winding is exercised in a direction passing substantially through the central axis of the rotating chassis.

In another embodiment, the arm of support of the support member comprises two branches articulated respectively on two offset support rods symmetrically on either side of the plane passing through the mandrel axes, at a sufficient distance from it to allow the winding of a coil on each mandrel up to a maximum radius corresponding to the distance between the central axis and the axis of the mandrel.

In this case, each support rod forms a beam extending cantilevered from the rotating frame and having a cross section of inertia sufficient to resist the forces applied to the mandrel by the strip under traction.

Preferably, the removable support member comprises a counter bearing likely to engage, by displacement relative axial, on a pin at the end of the mandrel opposite to the rotating chassis.

Generally, each madrin is of the type comprising segments which can be moved radially under the action of a control rod sliding axially in a bore of the mandrel shaft.

In this case, the mandrel support pin is advantageously provided at the end of the control rod and can engage removably, by axial displacement of said rod, in a housing corresponding to the arm of support after the installation of the latter in the axis of the mandrel.

In another advantageous embodiment, the removable support member consists of at least two jaws each placed at the end of a mounted arm pivoting on a support rod about an axis parallel to the central axis, between an open position for which the two jaws are far enough apart from the mandrel to allow removal of the coil, and a closed position for which the jaws are tightened on the end of the mandrel in the manner of pliers.

Preferably, in the case of a winder with two mandrels, this is equipped with two support members each consisting of a pair of jaws and mounted on two swivel arms each carrying two jaws belonging respectively to each of the two support members so that one or the other of the two mandrels is supported alternately by pivoting the two arms in one direction or in the other, the two jaws of a pair being in closed position on one of the chucks when both the jaws of the other pair are moved apart, in position open on either side of the other mandrel, so that allow unloading of the wound coil.

The invention also covers various arrangements advantageous, which are the subject of the subclaims and will be better understood from the following description of some embodiments given by way of example and represented in the accompanying drawings.

Figure 1 is a schematic top view of a carousel winder equipped with a device according to the invention.

Figure 2 is a schematic front view of the Figure 1 winder.

Figure 3 shows, in top view, another arrangement of support arms.

Figure 4 is a front view of an assembly method support arms.

Figure 5 shows schematically, the forces applied to the mandrel in three successive positions of the rotating chassis.

Figure 6 shows schematically, in front view, another embodiment of the invention.

Figure 7 is an elevational view of another mode of achievement.

Figure 8 is a front view of the mode of realization of figure 7.

FIG. 9 is a detail view, in axial section, a system for engaging the removable support member on the end of the mandrel.

Figure 10 and Figure 11 show, in view of face, two other embodiments of the invention.

Figure 12 shows the operating steps of the embodiment of Figure 11.

In Figures 1 and 2, there is shown schematically, in top view and in front view, a carousel winder, conventionally comprising a rotating chassis 1 rotatably mounted around a central axis 10, the chassis consisting, for example, of a drum cylindrical rolling on separated rollers 11 mounted rotary on a foundation block 12 or a fixed frame, each around an axis parallel to the central axis. A way rotation control such as a pinion 13 driven in rotating and meshing with a toothed crown not shown, formed on the periphery of the drum 1 allows to rotate it around its axis 10.

On frame 1 are mounted two mandrels winding 21, 22 extending in overhang from the chassis 1 and on the same side thereof. Each chuck 21, 22 is mounted on a shaft 2, 2 'and can be driven in rotation about an axis 20, 20 'parallel to the axis 10 of the rotating chassis 1 by means, for example, of a motor autonomous 23, 23 'mounted in the chassis 1. The motor rotation 23 can be hydraulic or electric but other known means of rotation control can be used, for example, a gear system arranged at inside the chassis 1 and driven by at least one motor so as to selectively control the drive in rotation of one or the other of the two mandrels.

Each mandrel is made, in a conventional manner, a tree 2 associated, as shown in FIG. 9, with a set of adjacent segments 26 sliding mounted radially on the shaft 2 and actuated by a rod 25 passing through an axial bore of the shaft 2 and carrying a rack which controls the expansion of the mandrel by segment spacing for hooking and winding of the band and then tightening the segments for allow the coil to be removed at the end of the winding.

All these provisions are well known and do not do not require a detailed explanation.

In general, the rotating chassis allows place each of the two mandrels successively in a first winding start position A then in a second position B for complete winding and extraction of the coil. Normally, the two positions A and B are diametrically opposite, so that one of the mandrels 21 either in the start position A when the other mandrel 22 is in position B for extracting the coil.

As indicated above, at the end of the winding of a coil 3 on the mandrel 22 after strip shear it is possible, in the position A, to fix on the mandrel 21 the end 31 of the strip placed upstream of the shear line and constituting the head of the next strip and control the rotation of the mandrel 21 by means of the corresponding motor 23 to start the winding of the next reel 30 during the time necessary for the extraction of the coil 3 wound on the mandrel 22 in position B.

To start the winding, we use advantageously a reel E of known type shown schematically in Figure 12 and which is placed after the beginning of the winding, in a spread position not annoying not the rotation of the rotating chassis.

To allow the extraction of the coil, the shaft 2 of each mandrel is embedded in the chassis 1 at its end turned towards it and thus extends overhanging supporting the weight of the reel 3.

However, during winding, the end 24 of the shaft 2 of the mandrel opposite the chassis 1 can, depending on the invention, to be removably supported on the solid mass of foundation 12 or on a fixed frame, via a rotary support member 4.

In a first embodiment of the invention, shown in Figure 1, the support member 4 comprises a counter bearing 40 mounted at the end of a support arm 41 which, at its other end, is mounted on the end of a central shaft 5 centered on the central axis 10 and of which the opposite end 51 is embedded in the chassis turning 1.

In addition, the support arm 41 is articulated on the free end 52 of the central shaft 5 around an axis 42 perpendicular to the central axis 10 so as to allow 180 ° rotation of the support arm 41 with the counter bearing 4. The latter is, on the other hand, arranged so that its two lateral faces 43, 43 ′ can engage so removable on a pin arranged at the end 24 of the shaft chuck 2.

So, at the end of the reel winding 3 and after shearing the strip, it is possible to immediately order a 180 ° rotation of the support 41 around its axis 42 to release the counter bearing 40 of the mandrel 22 carrying the wound coil 3 and engage it, by its opposite face 43 ', on the pin 24 placed at the end of the mandrel 21 located in the standby position A.

The rotation of the arm 41 can be controlled by any means, easy to design and supported by the central shaft 5, for example, an actuated rack 53 by a jack 54 and meshing on a pinion centered on the axis 42 and integral in rotation with the arm 41.

Similarly, the counter-bearing 4 can be equipped, on its two lateral faces 43, 43 ', of two contiguous bearings committing, in one way or the other, to one or the other of the pins 24, 24 ', with a clearance allowing the arm rotation 41.

This operation can be carried out during the time necessary for the engagement of the head 31 of the new coil on the mandrel 21. In this way, from the start of the winding, the mandrel 21 is supported, at its end 24, by the support member 4.

The tensile force applied to the strip for allow the winding thereof does not result in bending of the mandrel 21 which is held at its two ends respectively by the revolving frame 1 and by the member support 4 and the corresponding reaction is transmitted to foundation mass by the arm 41, the central shaft 5 and the chassis 1.

The central shaft 5 which is embedded, by its end 51, on the chassis 1 can have rigidity necessary to absorb this reaction. However, it is preferable that the opposite end 52 of the central shaft 5 build directly on the foundation, by example by means of a counter bearing 55 which can engage from removably on the end 52 of the shaft 5, the counter bearing 55 being carried, for this purpose, by a support arm 56, for example as shown in Figure 2.

In order not to hinder the rotation of the support arm 41, the arm 56 carrying the counter bearing 55 and bearing on the foundation block 12, is rotatably mounted around an axis 57 separated from the central axis 10 and from the axis 20 of the mandrel 21.

In this way, after complete winding of the coil 3 on the mandrel 22, we can firstly spread the arm 56 and the counter bearing 55 by rotation about the axis 57, then control the rotation of the support arm 41 so that the support member 4 comes to engage on the end 24 of the mandrel 21 in standby position A. The counter bearing 55 can then be brought back to the end 52 of the central shaft 5 by rotation of the arm 56.

As indicated, the support arm 41 is mounted pivoting around the axis 42, on the end 52 of the central shaft 5 and the latter can be secured in rotation with the rotating frame 1 so as to rotate with this one when we pass the shaft 21 from the position start A to full winding position B.

We see that, during all this rotation, the organ support 4 remains engaged on the pin 24 of the mandrel 21 and therefore allows it to withstand the tensile force applied by the strip without risk of bending of the mandrel 21, the reaction being taken up by the central shaft 5.

However, in a more sophisticated arrangement shown schematically in Figures 1 and 2, the tree central 5 is rotatably mounted around axis 10 on the rotating frame 1, so as to allow sliding angular and is associated with a torque motor 61, fixed on a extension 6 of the shaft 5 and making it possible to apply to this one a torque.

As shown schematically in Figure 2, to ensure correct winding of the strip 32 on the mandrel 21, forming a coil 30, the strip 32 is subjected to tensile stress T whose distance to the axis of rotation 20 gradually increases, as well as the weight P of the coil 30 which is added to the self-weight of the arm 41.

The result of the efforts thus applied to the end of the arm 41 therefore exerts, on the latter, a torque of variable rotation.

According to the invention, the torque motor 61 exerts on the central shaft 5, a direction compensation pair reverse, which is permanently adjusted according to the length of wound tape and orientation of the stretched strand 32 so that the reaction applied to the support arm 41 which is the result of the tensile force T applied on the strip and the weight of the reel 30, passes substantially by the central axis 10.

In Figure 5 there is shown, by way of example, three stages of operation.

Figure 5a shows the start position for which the load P applied to the axis of the mandrel is relatively small, for example a ton. Traction applied can be of the order of 2.5 T. The resulting R, directed upwards, is compensated by an opposite force R ' having an R'x component taken up by the support arm and a component R'y taken up by the application of the torque. We sees that, in this position, the support arm OA is subjected to traction and the torque is applied in the direction trigonometric.

After starting the winding, control the rotation of the rotating chassis. In the middle position shown in Figure 5b, the applied load P can be of the order of 20 T and the traction T of approximately 7 T, the scale of representation of the forces being modified.

The resultant R is directed downwards and the charge P is mainly taken up by the support arm OA which is compressed. The couple is then directed in the direction negative, opposite to the tensile force.

Figure 5c corresponds to the position of unloading after complete winding. The load P can be 30 T, the pull being 15 T. The torque is applied again in the positive direction and compensates essentially the charge P.

By applying a variable torque to the support arm 41, the bending moment applied by the strip is reduced to a minimum, the support arm not being subjected, in practice, only to tensile or compression.

It may be necessary, however, to secure in rotation the central shaft 5 with the rotating chassis 1. This is the case, for example, when the traction between the last rolling stand and the winder is not applied or may be disturbed, especially after the cutting a coil end and when priming the coil next.

This is why it is advantageous to get on the chassis 1 a brake 60 capable of blocking the rotation of the shaft 5. In this way, the winder can operate, either with application of a modulated compensation torque, i.e. with securing of the central shaft.

In the embodiment of Figures 3 and 4, the two mandrels 21, 22 are associated, respectively, with two support members 4a, 4b each mounted at the end of an arm support 41a, 41b articulated on the end of the shaft central 5 around an axis perpendicular to the central axis 10. For example, as shown in Figures 4 and 5, the two support arms 41a, 41b can be articulated on a part 44 forming a core which is keyed on the end 52 of the central shaft 5 so as to rotate therewith. Each arm 41a, 41b can be associated with a jack rotary hydraulic 45a, 45b which controls the rotation of the arms around its axis.

In this case, the counter bearing 4 placed at the end arm 41a, 41b is arranged so as to be able to engage in one direction on the end 24 of the mandrel, by rotation around its axis.

Preferably, as shown in Figure 3, the counter-bearing 55 for supporting the central shaft 5 is mounted at the end of a rod 5 'placed in the extension of the shaft 5 so as to allow the rotation of one or the other of the two arms 41a, 41b for the release of the corresponding support member 4a, 4b. In this case, the counter bearing 55 does not hinder the discharge of the coil and can be mounted on a fixed support bearing on the foundation 12.

Central shaft 5 must have a minimum section ensuring sufficient rigidity to withstand the reaction chucks. As a result, the maximum diameter of the coil that can be wound on each mandrel is limited at the distance between the axis 20 of the mandrel and the periphery of tree 5.

To increase this maximum diameter, you can use the arrangement shown schematically in Figure 6 and in which the reaction is collected by two rods 7, 7 'which extend in overhang from the chassis turning 1 and are symmetrically spread apart and on the other side of the plane P 'passing through the axes of the two mandrels.

In this case, each support arm 41 carrying a support member 4 consists of two branches 45, 45 ' articulated respectively on the two support rods 7, 7 ' around axes 46, 46 'which are aligned and perpendicular in plane P 'passing through the axes of the two mandrels.

The two rods 7, 7 'each form a beam embedded in the frame 1 and extending in overhang. They must therefore have, in cross section, an inertia sufficient to withstand the forces applied to the mandrel by the band 32 under tension.

To allow the winding of each coil up to a maximum diameter, each rod 7, 7 'must register in the space limited by the two centered circles on the axes 20, 20 'of the mandrels and having a radius equal to the distance between the axis 20 of the mandrel and the central axis 10. Preferably, each rod 7, 7 'has a section substantially triangular and is bounded by faces curved in the form of circular sectors centered on the axes 20 and 20 '.

Furthermore, in the embodiments described until now, each support arm 41 is articulated around an axis perpendicular to the central axis 10 and comes place yourself in a position parallel to this axis to allow unloading of the wound coil.

However, the release of the support member 4 can also by pivoting around an axis parallel to the central axis 10, the support member 4 then remaining in a plane perpendicular to this axis.

For example, in the arrangement shown on the Figure 7, the winder is equipped with two support members 4a, 4b carried respectively by the ends of two arms 41a, 41b which are pivotally mounted on the end of a central shaft 5, around the axis 10 thereof.

As shown schematically in Figure 8, which is a front view of the winder, each arm 41a, 41b can be associated with a toothed sector 61 on which a fixed gear 62 rotated by a non-mechanism shown which can advantageously be mounted in a fixed support member 56 'carrying a centering bearing of the end of the shaft 5 opposite the rotating frame 1, the fixed support member 56 'can be simply fixed on the frame or the foundation 12.

So, as Figure 8 shows, each organ support 4 can be placed by simple rotation of the support around axis 10, in line with the axis of a mandrel, either in a separated position C 'for which the support arm 41 is, for example, perpendicular to the plane passing through the axes of the mandrels 21, 22.

To allow the engagement and release of the support member 4, the latter advantageously comprises a counter bearing 40 carried by a piece 47 slidingly mounted axially on the end of the support arm 41 which carries a sliding control member 48, for example a cylinder or screw-nut system.

However, as noted earlier, a winding mandrel usually consists of a set of segments mounted to slide radially on a rotation shaft and whose expansion can be controlled or shrinking it by means of a sliding control rod axially.

This is why, in another provision advantageous shown in Figure 9, the support member 4 includes a counter bearing 40 which can be mounted on the end 27 of the expansion rod 25 and engages in a corresponding housing 47 'formed at the end of the support arm 41, when sliding axially the control rod 25 to determine the expansion of the mandrel. Conversely, at the end of the winding of a reel, the control rod is moved back to determine the shrinking of the mandrel and, at the same time, the counter bearing 40 is released from the housing 47 ′, which allows the pivoting of the arm 41 in the separated position C '.

Of course, the invention is not limited to details of the embodiments which have just been described, other provisions and equivalent means can be used, without departing from the protective framework defined by the claims, to ensure, according to the invention, a permanent support for the mandrels.

In particular, the counter-bearing which constitutes the removable support member, may be formed by two half-bearings formed on two movable jaws likely to tighten, like a clamp on the end 24 from the mandrel shaft, or move away from it to allow unloading of the wound coil.

For this purpose, the two jaws of each organ support are carried by two pivoting arms and, in the case where two support members are used, each of the two arms can advantageously carry two jaws belonging, respectively, to each of the two support members.

In the embodiment shown in the figure 10, for example, the support member 8 consists of two jaws 8a, 8b each placed at one end of an arm 81a, 81b which carries, at its other end, a jaw 8'a, 8'b of the other support member 8 '. The two arms 81a, 81b, are articulated, in their central part, on a tree central 5, around a common pivot 82 centered on axis 10 of the rotating frame (1), the centers of the jaws being placed at the same distance from the central axis 10 as the axes of the two mandrels 21, 22.

In addition, the jaws carried by each arm 81 are offset laterally with respect to pivot 82 of such so that the planes P1, P2 passing through the central axis 10 and the centers of the jaws 8a, 8'a form an obtuse angle.

Each of the two arms 81a, 81b, is provided with a sector toothed 61 on which meshes a pinion 62 actuated by a mechanism mounted on the rotating frame 1 and capable of turn the arm 81 in one direction or the other.

Thus, by rotation of the two arms 81a, 81b, the two jaws 8a, 8b, tighten, like a pliers, on the end 24 of the shaft of one of the mandrels 21 while the other two jaws 8'a, 8'b deviate from the other mandrel 22 a sufficient distance to allow removal of the wound coil.

As in the case of FIG. 7, the arms 81 of support of the jaws remain in a plane perpendicular to the central axis 10. The central shaft 5 can therefore either extend in overhang from the rotating chassis 1, either rest on a fixed support by its opposite end to chassis 1.

In the embodiment of FIG. 11, the arms 83a, 83b, for supporting the support members 8, 8 'are articulated, respectively, on pivots 82a, 82b with axes parallel to the central axis 10 and formed on the ends of two rods 7a, 7b, each forming a support beam, analogously to the embodiment of FIG. 6.

Each support member 8, 8 ′ further consists of two half-bearings provided on two jaws 8c, 8d carried, respectively, by the two arms 83a, 83b. In this case, however, each of the two arms 83a, 83b extends between the two mandrels 21, 22 and has a sector shape angular pivotally mounted, at its apex, on a rod 7a, 7b and carrying two jaws apart, respectively 8c, 8'c and 8d 8'd, whose centers are placed on a centered circle on the axis of the corresponding pivot 82a, 82b and passing through the axes of the two mandrels 21, 22.

In this way, by rotation in opposite direction of the two arms 83a, 83b, a first pair of jaws 8c, 8d comes tighten on the end 24 of a first mandrel 21, while the other two jaws 8'c, 8'd are sufficiently spaced from the second mandrel 22 to allow the coil unloading.

By reverse rotations, the second pair of jaws 8'c, 8'd tightens on the second mandrel 22 while the other two jaws 8c, 8d deviate on either side of the first mandrel 21.

Each of the two arms 83a, 83b is provided with a sector toothed 63a, 63b centered on the axis of the support rod corresponding 7a, 7b and on which a pinion 64a meshes, 64b centered on the axis of the other support rod 7b, 7a.

In FIG. 12, three stages of operation of a winder of this type.

In FIG. 12a, the mandrel 21 is in the start position A. The two jaws 8c, 8d are tightened on the end of the shaft of the first mandrel 21 while the other two jaws 8'c, 8'd are separated of the second mandrel 22 which is in position B of unloading, so as to allow the coil to be removed 3 fully wound. A reel E of known type is applied to the mandrel 21 to facilitate the attachment of the strip 32 and starting the winding.

Figure 12b shows an intermediate position of the rotating chassis. The first mandrel 21 on which takes place the winding of the strip 32 is supported by the two arms 83a, 83b, the other mandrel 22 being discharged.

Figure 12c shows the end of the winding, the first mandrel 21 being in the position of unloading B. It may be advantageous to order separately the rotation of the two arms 83a, 83b. For example, in FIG. 12c, the support arm 83b has already been moved apart to place the jaw 8'c on the second mandrel 22 which is in start position A, while the mandrel 21 can still be supported by arm 83a up to taking over the coil.

We then rotate the arm 83a so that the mandrel 22 is held by the two tightened jaws 8'c, 8'd.

The device shown in Figure 10 works analogously.

Of course, other operating methods can be imagined, the possibilities being numerous.

The reference signs inserted after the technical characteristics mentioned in the claims are intended only to facilitate the understanding of them and in no way limit them the scope.

Claims (23)

Carousel winder for winding a strip product on one or the other of at least two mandrels (21, 22), comprising a rotating frame (1) rotatably mounted around a central axis (10 ) on a fixed frame (12), at least two mandrels (21, 22) rotatably mounted on the rotating frame (1), each around an eccentric axis (20) parallel to the central axis and extending in door - overhang on the same side of the rotating chassis (1), from a fitting end on the chassis (1) to an opposite end (24), means (23) for selective control of the rotation of one or other of the mandrels (21, 22) about its axis, and means (13) for controlling the rotation of the rotating frame (1) around its central axis (10), for placing in selective position of a first winding mandrel (21) in a first winding start position (A) then the passage of said winding mandrel (21) from the first position (A) to at least one two ith position (B) for complete winding and unloading of the coil (3), with simultaneous return of the second unloaded mandrel (22) from said second position (B) to the first position (A),
characterized by the fact that it comprises a device (4, 41, 5) for permanent support of the end (24) opposite the rotating frame (1) of the shaft (2) of each winding mandrel (21) from the first start position (A) to the complete winding position (B), comprising at least one removable rotary support member (4) from said opposite end (24) of the mandrel (21), bearing on the fixed frame (12), by means of support means (41) rotatably mounted with the rotating frame (1) around the central axis (10) thereof and control means, respectively, of the engagement of the support member (4) on the end (24) of the mandrel (21) in the first starting position (A) and up to the second complete winding position (B) and release of the support member (4) with spacing of the support means (41), in a third position (C) sufficiently spaced from the mandrel (21) to allow the unloading of the wound coil (3). Carousel winder according to claim 1, characterized in that the support means for the removable support member (4) comprises at least one arm support (41) bearing, at a distance greater than the width of a coil (3), on one end at least a support rod (5) (7) fixed at its other end in the rotating frame (1) and extending in one direction parallel to the central axis (10). Carousel winder according to claim 2, characterized in that the support arm (41) is articulated on at least one support rod (5) (7) around a axis perpendicular to the central axis (10) so that it can pivot between the engagement position of the support member (4) on the end (24) of the mandrel (21) and a position apart (C), for which the support arm (41) is placed in a plane substantially parallel to the central axis (10). Carousel winder according to claim 2, characterized in that the support arm (41) is articulated on at least one support rod (5) (7) around a axis parallel to the central axis (10) so as to be able pivot between the engagement position of the support member (4) on the end (24) of the mandrel (21) and a position apart (C '), for which the support arm (41) is angularly offset relative to the mandrels (21, 22) of so that the support member (4) is sufficiently distant said mandrels (21, 22) so as not to hinder unloading of a completely wound coil (3). Carousel winder according to one of the Claims 3 and 4, characterized in that the arm support (41) is articulated on a single rod forming a support shaft (5) centered on the central axis of rotation (10) of the rotating chassis. Carousel winder according to claim 5, characterized in that the central support shaft (5) is recessed in the rotating frame and extends overhang to its opposite end (52) on which is articulated the support arm (41), the central shaft (5) forming a beam strong enough to transmit to the fixed frame (12), via the rotating frame (1), at least part of the forces applied to the mandrel winding (21). Carousel winder according to claim 5, characterized in that the central support shaft (5) is supported on the fixed frame (12), at its end (52) opposite the rotating frame (1), via a support member (56). Carousel winder according to one of the claims 5, 6, 7, characterized in that the tree central support (5) of the support arm (41) is mounted rotatable about the axis (10) on said rotating frame (1) with possibility of angular sliding and is associated with means (61) for applying to the central shaft (5) a torque around the central axis (10) adjusted by so as to compensate for the weight of the reel (3) in progress of winding and the torque resulting from the traction exerted on the strip (32), so that the result of all the forces applied to the support arm (41) by the mandrel (21) during winding is exercised according to a direction passing substantially through the central axis (10) of the rotating frame (1). Carousel winder according to claim 8, characterized in that the central support shaft (5) is associated with a torque compensation motor (61) applied to said central shaft (5) and can be removably secured to the rotating frame (1) by a brake (60). Carousel winder according to one of the Claims 3 and 4, characterized in that the arm for supporting the support member (4) comprises two branches (45, 45 ') bearing respectively on two rods (7, 7 ') embedded in the rotating frame (1) and extending in overhang from it, each rod (7, 7 ') forming a beam having, in cross section, an inertia sufficient to withstand the forces applied to the mandrel by the strip (32) under tension, said rods (7, 7 ') being offset symmetrically on either side of the plane (P ') passing through the axes of the two mandrels (21, 22), at a sufficient distance from it to allow winding of a coil (3) on each mandrel (21, 22) up to a maximum radius corresponding to the distance between the axis central (10) and the axis (20) of the mandrel (21, 22). Carousel winder according to claim 10, characterized in that each support rod (7, 7 ') is limited on the side of the central axis (10) of the rotating chassis (1) by two faces respectively facing the two mandrels (21, 22) and tangents, each to a centered circle on the axis (20) of the corresponding mandrel and of radius at most equal to the distance between the axis (20) of the mandrel (21) and the axis central (10) so as to allow the complete winding of the corresponding coil (3). Carousel winder according to one of the previous claims, characterized in that the removable support member (4) comprises a counter bearing (40) centered on the axis (20) of the mandrel interposed between a pin at the end (24) of the mandrel (21, 22) opposite the rotating frame (21) and the end of the support (41) relative. Carousel winder according to claim 12, characterized in that the support arm (41) of the counter bearing (40) is mounted on the end of the support (41) and is articulated around an axis (42, 46, 46 ') orthogonal to the central axis (10) and that the counter bearing (4) is arranged so as to engage on the end (24) of the shaft (2a, 2b) of each mandrel (21, 22) and to be released thereof by rotation of said support arm (41) around of its axis (42). Carousel winder according to claim 13, characterized by the fact that it comprises a support arm (41) single associated with the same counter bearing (4) having two opposite faces (43, 43 ') capable of engaging so removable on the ends, respectively, of one or the other of the shafts (2a, 2b) of the mandrels (21, 22). Carousel winder according to claim 14, characterized by the fact that the central support shaft (5) releasably bears on the fixed frame (12) at its end (24) opposite the rotating frame (1) by through a support member (56) movable between a support position for the end of the support shaft central (5) and a separated position allowing the displacement of the support member support arm (41) (4) from one to the other of the mandrels (21, 22). Carousel winder according to claim 13, characterized by the fact that it comprises at least two arms support (41a, 41b) articulated on the central support shaft (5) and each associated with a mandrel (21, 22), each arm (41a, 41b) carrying a support member (4a, 4b) capable of engage removably on the end of the shaft (2a, 2b) of the corresponding mandrel (21, 22) which can pivot between a closed shaft support position (2a, 2b) of the corresponding mandrel (21, 22) and an open position, substantially in alignment with the central support shaft (5). Carousel winder according to claim 16, characterized in that the central support shaft (5) is extended beyond the joints (42) of the support arms (41a, 41b) by a part (5 ') bearing on the frame fixed (12) via a rotary support member (55) resting on a fixed support sufficiently spaced from joints (42) to allow the establishment of each support arm (41a, 41b) in the open position and removing the coil (3) from the mandrel (21, 22) corresponding. Carousel winder according to claim 12, characterized in that the counter bearing (4) is carried by a piece (47) slidingly mounted, parallel to the axis central (10), on the end of the support arm (41), this the latter being provided with means (48) for controlling the sliding of said part (47) for engagement or release of the counter bearing (40). Carousel winder according to claim 12, wherein each mandrel (21, 22) comprises a rod expansion control (25) axially movable for expansion or constriction of the mandrel, characterized by causes the axial displacement of the control rod (25) determines, in the direction of expansion, the commitment of the end (27) of the rod (25) in a housing corresponding (47 ') of the support arm (41) and, in the direction shrinking, the clearance of said end (27), this last bearing with possibility of rotation in said housing (47 '). Carousel winder according to one of the Claims 4 to 7, characterized in that the organ removable support (8) consists of at least two jaws each placed at the end of an arm pivotally mounted on a support rod (5, 7) around an axis parallel to the axis central (10), between an open position for which the two jaws (8a, 8b) are sufficiently spaced from the mandrel to allow removal of the coil, and a closed position for which the jaws (8a, 8b) are tightened on the end (24) of the mandrel in the manner pliers. Carousel winder according to claim 20 comprising two mandrels (21, 22) mounted on the chassis rotating (1), characterized in that it comprises two support members (8, 8 ') each consisting of a pair of jaws (8a, 8b) (8'a, 8'b) and two swivel arms (81a, 81b) (83a, 83b) each carrying two jaws (8a, 8'a) (8b, 8'b) respectively belonging to each of the two support members (8, 8 ') so that one or other of the two mandrels (21, 22) is supported alternately by pivoting of the two arms in one direction or the other, the two jaws (8a, 8b) of a pair being in the closed position on one of the mandrels (21) when the two jaws (8'a, 8'b) of the other pair (8 ') are moved apart, in position open, on either side of the other mandrel (22). Carousel winder according to claim 21, characterized in that the two support arms (81a, 81b) are articulated in their central part on a tree central support (5) around a pivot (82) centered on the axis (10) of the chassis (1) and bear at two opposite ends, two jaws (8a, 8'a) (8b, 8'b) of two pairs which are centered respectively on axes placed at the intersection of a centered cylindrical surface on the axis (10) of the pivot and passing through the axes of the two mandrels (21, 22), with two planes (P1, P2) respectively passing through the pivot axis (10) and offset angularly, so as to form two clamps, one of which is open when the other is closed. Carousel winder according to claim 21, characterized in that the two support arms (83a, 83b) are each articulated around a pivot (82a, 82b) respectively on two supporting rods (7, 7 ') apart symmetrically of the central axis (10) in a plane perpendicular to the plane passing through the axes of the two mandrels (21, 22), and extend towards each other in passing between the two mandrels (21, 22), and that each arm support (83a, 83b) carries two spaced apart jaws (8c, 8'c) (8d, 8'd), belonging to two support bodies different and centered, respectively on axes placed at the intersection of a cylindrical surface centered on the axis of the corresponding pivot (82a, 82b) passing through the axes of the two mandrels (21, 22), with respectively, on two planes passing through the pivot axis (82a, 82b) and forming between them an acute angle, the angles of the two arms (83a, 83b) being equal so that, by rotation of the two arms (83a, 83b) towards each other, the two jaws (8c, 8d) of a first support member (8) tightens on a first mandrel (21) while the jaws (8'c, 8'd) of the second support member (8 ') are open on either side of the second mandrel (22), and vice versa.

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