EP1182158A1 - Driving device for winding or unwinding a material web - Google Patents

Abstract

The bearing and drive system for a winding bar or mandrel for a web of material comprises a drive bearing (1) and a driven bearing, each consisting of a fixed body (10) in which a shaft (2) can slide. The end of the shaft is shaped to fit into the end of the bar or mandrel. The shaft of the drive bearing is set in rotation by a rotating sleeve (3) in which it can slide while still connected to it and rotating, while the shaft of the driven bearing rotates freely. Each fixed body is cylindrical and contains a chamber (11) in which a hydraulic piston (12) which is coaxial with the shaft can slide. and is shaped at the downstream end so that the shaft can be extracted.

Description

The present invention relates to a device for maintaining and driving a winding bar or of a tube-shaped mandrel for winding or unwinding of layers of materials.

We already know devices as defined previously which consist of bearings each having a shaft movable in rotation in a fixed body and provided with end of a seat which has a recessed imprint of non-cylindrical shape complementary to that of a end of the winding bar that takes place there, as well that a moving part intended to come and cover said end to hold it in said seat.

The winding bar or the template are thus mounted by their two ends in bearings of which the tree of one of them is able to be rotated.

The moving part is generally presented under the shape of a steering wheel capable of either tilting or being axially translated, and the operation of which is carried out manually.

It has been proposed to automate the maneuvering of these devices such as the one described in the document GB925755 allowing the automatic winding of a material in strips wound or not on a winding template in hollow axis shape and can be adjusted according to the width of said strips. On the one hand it includes a bearing leading and a driven bearing each comprising in a body fixes a movable shaft in axial translation, the shaft of the leading bearing being rotated through a sleeve actuated in rotation in said body thanks to a driving means and inside which sleeve can be axially displacing said shaft while being linked thereto rotation while the shaft of the driven bearing is mounted in free rotation. The end of each tree has a frustoconical shape allowing pressure contact on the end of the corresponding hollow axis to abut this last to said leading bearing and led bearing and to link them in rotation. On the other hand the device comprises a mandrel expansion so that a reel with a template in tube shape can be arranged and held between said shafts and that a coil without a winding template can be placed between said trees and maintained by said expansion device. The trees are moved each through a moving part in the body fixed under the action of a pneumatic cylinder arranged at the outside of said fixed body and connected to the end of its rod through a link to said piece mobile.

However the complex structure of this type of device does not allow easy disassembly of bearings which makes maintenance difficult and costly. In in addition to the mechanical connection between the shaft and the pneumatic cylinder rod placed outside said body, the dust gets inside the latter which requires frequent disassembly of bearings for cleaning increasing their cost and time accordingly maintenance.

The object of the present invention is to remedy these disadvantages by proposing a holding device and for driving a winding bar or a mandrel in new design tube shape for performing easy and fast maintenance and optimize winding and unwinding operations of plies of materials.

The support and training device a winding bar or a tube-shaped mandrel according to the invention is of the type comprising a leading bearing and a driven bearing each consisting of a fixed body in which can move axially a shaft with a shaped end to be able to abut one of the ends, adapted for this purpose, of said bar winding or said mandrel, the bearing shaft leading being rotated by means of a sleeve actuated in rotation in said body by means motor and inside which sleeve can move axially said shaft while being linked to it in rotation while the driven bearing shaft is rotatably mounted free and essentially characterized in that each fixed body is in the form of a cylinder body a jack in the sealed chamber which can move, under the action of a fluid, a piston coaxially secured of the driving or driven shaft and in that said body of cylinder is arranged at its downstream end so as to be able to extract said shaft from said end.

According to the invention the piston is secured to a tubular element traversed axially by the shaft which is mounted in free rotation in said element by means of rolling and secured to the latter in axial translation, the guiding in translation axial in the cylinder body of the tubular element being held by sliding means interposed between the internal face of said body and the external face of said element tubular.

In a preferred embodiment of the sliding means located downstream of the chamber sealing consisting of a sliding ring wedged in a ring fixedly held at the downstream end of said body between a stop segment housed in a groove made in the inner wall of the cylinder body and an annular stop closing the downstream part of the sealed chamber.

So to disassemble the bearing just remove the stop segment and exit by the face downstream end of the shaft assembly, ring support ring sliding, annular stop and tubular element. The assembly and disassembly of elements of a bearing according to the invention are therefore much faster and easier than with current bearing devices.

The end of a bar winding at the ends of the shafts can be realized either by association of a male imprint and an imprint female, whose matching footprints of the tree leading bearing and said winding bar comprise rotating connection means intended to cooperate between them, either by insertion of lugs, secured on the around the front face of the end of the shaft or the winding bar in housings in the front face of the respective bar or shaft.

The imprints are preferably in shape frustoconical or square.

For a tapered imprint the rotating connection means consist of streaks of engagement making it possible to link in rotation the end of the shaft with the end of the winding bar when the two ends are inserted into each other to their abutment.

In the case of a female form imprint frustoconical this may advantageously include a rounded inner wall to facilitate extraction of the corresponding male end.

For square-shaped male impressions these will advantageously be each surrounded by a cylindrical ring so as to form a space between it and said male imprint intended to receive closely the wall of the corresponding female imprint so as to radially block the male footprint in the footprint female removing existing radial clearance.

The abutment of the ends of a mandrel in tube form at the ends of the trees will be made of preferably by means of an expanding mechanical head.

The drive trees can advantageously include at their abutment end a interchangeable tip for adapting said shafts to any type of abutment with a winding bar or a tube-shaped mandrel, which endpiece will be associated with a fastening means at the end of the tree and to connecting means in rotation with said shaft.

In a preferred embodiment the nozzle will have a cylindrical shape and will be intended for be introduced into additional accommodation in the end of the tree.

The attachment of the nozzle in the housing of the shaft can be made for example by screwing a screw axially passing through said end piece in the bottom said shaft housing while the rotational connection of the tip with the shaft can be achieved with pins which will for example be placed on all or part of the periphery of the front face of the tree to come engage in recesses made for this purpose in the internal face of a collar.

In the case of abutment with a mandrel the nozzle will have an expandable head by means of keys moving radially against the inner wall from the end of the mandrel due to the advancement of the tree.

• la figure 1 représente une vue en coupe longitudinale d'un corps fixe du palier menant d'un dispositif selon l'invention.
• la figure 2 représente une vue en coupe longitudinale partielle du corps fixe précédent avec une position avancée de l'arbre.
• la figure 3a représente une vue en coupe longitudinale d'un embout d'extrémité comprenant une empreinte femelle.
• la figure 3a représente une vue de gauche de ce même embout.
• la figure 4a représente une vue en coupe longitudinale d'un embout d'extrémité comprenant une empreinte male de forme carrée.
• la figure 4b représente une vue de droite de ce même embout.
• la figure 4c représente une vue de gauche de ce même embout.
• la figure 5a représente une vue en coupe longitudinale d'un embout dans une forme particulière du moyen de liaison en rotation.
• la figure 5b représente une vue de droite du même embout.
• la figure 6 représente une vue schématique en coupe partielle d'une barre d'enroulement apte à être entraínée en rotation par des extrémités coniques des arbres des paliers menant et mené.
• la figure 7 représente une vue en coupe longitudinale d'un embout expansible.

The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.

• FIG. 1 represents a view in longitudinal section of a fixed body of the bearing leading from a device according to the invention.
• 2 shows a partial longitudinal sectional view of the previous fixed body with an advanced position of the shaft.
• FIG. 3a represents a view in longitudinal section of an end fitting comprising a female imprint.
• Figure 3a shows a left view of the same tip.
• FIG. 4a represents a view in longitudinal section of an end fitting comprising a male imprint of square shape.
• Figure 4b shows a right view of the same tip.
• Figure 4c shows a left view of the same tip.
• FIG. 5a represents a view in longitudinal section of a nozzle in a particular form of the rotating connection means.
• Figure 5b shows a right view of the same tip.
• Figure 6 shows a schematic partial sectional view of a winding bar capable of being rotated by conical ends of the shafts of the driving and driven bearings.
• Figure 7 shows a longitudinal sectional view of an expandable tip.

If we refer to Figure 1 we can see a leading bearing 1 comprising a body 10 intended to be fixed on a fixed support, not shown. The body 10 presents itself in the form of a cylinder body of a double-acting cylinder comprising two fluid inlets 10 ′, that is to say that it has a sealed chamber 11 in which can be axially move a piston 12 integral, coaxially, of a tubular element 13.

The filling of chamber 11 by the entrances 10 'is carried out by supply connections not shown, which has the effect of axially displacing the piston 12 and tubular member 13, as can be seen in Figure 2, according to F, when filling the chamber 10 upstream of the piston 12, and in the opposite direction, when filling of chamber 10 downstream of the latter.

The tubular element 13 is traversed axially by a shaft 2 which is carried by bearing rings 14 wedged both in the tubular element 13 and on the shaft 2, so that it is freely rotating in the tubular element 13 and secured thereto in axial translation.

The rear end 20 of the shaft 2 is cylindrical and is introduced into a sleeve 3 itself mounted in free rotation in the body 10 via of bearings 30 wedged both on the sleeve 3 and in the body 10, while the rear end 20 of the shaft 2 and the sleeve 3 are linked in rotation by means of longitudinal grooves 21 and 31 respectively, so that the axial translation of the shaft 2 in the body 10 can be achieved while maintaining the end 20 and the sleeve 3 linked in rotation, as we can see on the figure 2.

Furthermore, the end 32 of the sleeve 3 which overflows to the body 10 is intended to be coupled to a means motor not shown.

The front end 20 'of the tubular element 13 is sliding contact with the end of the body 10 located downstream of the chamber via a ring self-lubricating 15 wedged in a ring 16 locked between a share an annular part 17, crossed by the element tubular 13, closing with it the downstream part of the chamber 10 while being wedged against a shoulder 17 'practiced in the body 10 and on the other hand a stop segment 18 or "circlips" wedged in the body 10.

The realization of the landing leading according to the invention allows, unlike current devices, quick disassembly by removing simply the segment 18 then releasing the ring 16, the annular part 17 and the tubular element assembly, shaft 2, by the downstream face of the cylinder body 10.

We can also see that the front end 20 ' of the shaft 2 is provided with an interchangeable tip 4 fixedly held in a housing 22 formed in the face front of tree 2.

The end piece 4 has a cylindrical shape in the end face 40 of which is axially formed a female imprint 41 of frustoconical shape intended for receive the complementary male end of a bar winding 8. The end piece 4 is fixedly held in the housing 22 on the one hand axially by means of a screw 42 screwed axially in the bottom 41 of the cavity 40 and of the housing 22 and on the other hand in rotation with the shaft 2 by means lugs 23 formed for example by screwed screw heads around the front edge of the 20 'end of the bar 2 and engaged in recesses 43 made at this effect in the inner face of a flange 43 located at the front end 40 of the end piece 4.

It will be understood that it is therefore easy to change a end of bar 2 by simply unscrewing screw 42.

Several types of tips 4 can be secured to the end of the shaft 2 such as the end piece 400 shown in Figures 3a and 3b having an imprint female 410 of substantially frustoconical shape but whose internal wall 411 of the cavity is rounded so as to facilitate disengagement of the male end of the bar conical winding, not shown, the wall covers only one point of a generator of the rounded surface.

Figure 4a shows a tip 420 which has a cylindrical shape whose end 421, opposite to that 422 allowing it to be fixed to the shaft of a bearing, has a square shaped male fingerprint 423 intended for be introduced into a female form imprint complementary in the end of a bar winding. On the other hand, we can see that a ring cylindrical 424 is secured to the end 421 of the tip 420 surrounding a part of the male imprint 423 so as to create a space 425 allowing the introduction walls, not shown, of the end of the bar winding so as to prevent radial play between the two respective fingerprints of the end cap and the bar of winding during their rotation.

We can also see in Figure 4c recesses 426 intended to receive lugs from the end of the shaft for the rotational connection of the end piece 420 with this last.

Figures 5a and 5b show a tip 440 of which the connection at one end of the winding bar, not shown, is produced by two lugs 441 placed diametrically and intended to be housed in recesses made for this purpose in the end of the winding bar to abut.

The led bearing, not shown, just like the leading bearing, is of the type comprising a body of the form of a cylinder body of a double-acting cylinder, i.e. which has a sealed chamber in which can be move axially, by filling its chamber, a piston coaxially secured to a shaft and the end of which free of the shaft can also be provided with a nozzle interchangeable but mounted or not in free rotation.

Figure 6 shows schematically the end 80 of a winding bar 8, as well as nozzles 6 and 7 mounted respectively on the shaft 2 of a leading bearing and on the shaft 5 of a driven bearing.

The ends 80 and 81 of the bar winding 8 each have axially an imprint hollow, respectively 82 and 83, of frustoconical shape complementary respectively to the shape of the ends 70 and 60 of the ends 7 and 6.

Furthermore, the imprint 82 intended to receive the end piece 7 has meshing streaks 84 allowing to link in rotation the end piece 7 and the winding bar 8 when the nozzle 7 is introduced into the hollow impression 82.

The winding bar 8 is thus intended to be maintained between ends 7 and 6 of the shafts 2 and 5 respectively, which are introduced in the hollow impressions 82 and 83 during the translation F of shafts 2 and 5 in the bodies 10 by action of the pistons, leading and led bearings, not shown

The installation of the winding bar 8 between the leading and led bearings can be carried out several ways. It can, for example, be entered by a manipulator arm programmed to bring it in line with the bearing trees. However users of such bearings are not all equipped with manipulator arms allowing such an operation, also provision is made for candle-type supports each having a top a cradle 90, on which the bar can be placed winding 8.

The supports 9 are arranged so particular, in fact, after the placement of the bar 8 between ends 6 and 7, it should not plus be in contact with the supports 9, also the cradles 90 are arranged at a level such that the X axis of the bar winding 8 when it rests there, or at a level slightly lower than the Y axis of trees 2 and 5. When translation of the latter, the ends 7 and 6 penetrate in the respective cavities 82 and 83 and there center, thus causing, due to the frustoconical shapes of these fingerprints and tips, the lifting of the bar winding 8 and its disengagement from the cradles 90.

It will be noted that advantageously the supports 9 could be an integral part of the bearings leading and leading, as can be seen in Figure 1, where the fixed body 10 of the driving bearing comprises at its end before a seat 9 'capable of receiving the end of a winding bar 8. As before the axis of the bar winding 8 when it rests there, could be advantageously at a level slightly below the Y axis from tree 2.

If we now refer to Figure 7 we can see an end piece 430 with an expanding head 430 'which can be secured to the end of a shaft 2 according to the invention allowing to rotate a mandrel presenting itself in the form of a tube 434 and whose expandable head 430 ' is inserted tightly into the end of the latter when tree advance 2.

The expansion of the head 430 ′ is carried out mechanically by means of keys 431 and the end of the tube 434 bears against the front face of a collar 436 ', located at the rear of a part 436 key drive 431 able to move in translation.

Thus, under the combined effect of the advance of shaft 2 and the end of the tube in abutment against the part drive 436, it is moved to the shaft 2 in driving the keys 431 which then mount, by through bearings 432, on a ramp 435 which has the effect of radially moving the keys 431 against the inner wall of the end of tube 434 and the link in rotation with the expanding head 430 'and therefore with shaft 2 by the contact pressure exerted by the keys 431 on the internal wall of the tube 434.

A spring 433 allows to return automatically the drive part 436 and the keys 431 at the end of the nozzle in their original position after use.

This tip with an expanding head has a better efficiency than current tips including the head is made expandable by a rotating eccentric which controls the movement of the part which comes under pressure against the inner wall of the end of the template for the link in rotation with the shaft requiring release by impractical reverse rotation. In addition, the order in rotation of the eccentric is achieved by a motor means making the system more complex than the tip according to the present invention.

Claims (13)

Device for holding and driving a winding bar or a tube-shaped mandrel, for winding or unwinding layers of material of the type comprising a driving bearing (1) and a driven bearing each consisting of a fixed body (10) in which a shaft (2, 5) can move axially, having a shaped end so as to be able to abut at one of the ends, adapted for this purpose, of said winding bar or of said mandrel, the shaft (2) of the driving bearing (1) being rotated by means of a sleeve (3) actuated in rotation in said body (10) by means of a driving means and inside from which sleeve (3) can move axially said shaft (2) while being linked to it in rotation while the shaft (5) of the driven bearing is mounted in free rotation characterized in that each fixed body (10) is present under the shape of a cylinder body of a jack in the sealed chamber (11) which can be removed place, under the action of a fluid, a piston (12) coaxially integral with the driving shaft (2) or the driven shaft (5) and in that said cylinder body (10) is arranged at its downstream end so as to be able to extract from said end said shaft (2). Device according to claim 1 characterized in that the piston (12) is secured to a tubular element (13) traversed axially by the shaft (2, 5) which is mounted in free rotation in said element (13) via rolling means (14) and secured to the latter in axial translation and in that the guiding in axial translation in the cylinder body (10) of the tubular element (13) is maintained by sliding means (15) interposed between the internal face of said body and the external face of said tubular element (13). Device according to claim 2 characterized in that sliding means located downstream of the sealed chamber (11) consist of a sliding ring (15) wedged in a ring (16) fixedly held at the downstream end of the body cylinder (10) between a stop segment (18) housed in a groove formed in the inner wall of the cylinder body (10) and an annular stop closing the downstream part of the sealed chamber. Device according to any one of the preceding claims, characterized in that the abutment of the ends of a winding bar (8) at the ends of the shafts (2, 5) is produced either by association of a male imprint and of a female imprint, the concordant imprints of the shaft of the leading bearing and of said winding bar comprise rotational connection means intended to cooperate with each other, either by insertion of lugs, secured on the periphery of the front face from the end of the shaft or of the winding bar in housings made in the front face of the respective bar or shaft. Device according to claim 4 characterized in that the imprints are of frustoconical or square shape. Device according to Claim 5, characterized in that the imprint has a frustoconical shape and in that the rotational connection means consist of meshing streaks making it possible to link the end of the shaft in rotation with the end of the winding bar when the two ends are introduced into one another for their abutment. Device according to claim 5 characterized in that a female tapered imprint has a rounded internal wall so as to facilitate the extraction of the corresponding male end. Device according to Claim 5, characterized in that the male impressions are of square shape and in that said impression is surrounded by a cylindrical ring so as to form a space between it and said impression intended to receive the wall of the impression closely corresponding female so as to radially block the male imprint in the female imprint. Device according to any one of Claims 1 to 3, characterized in that the abutment of the ends of a tube-shaped mandrel at the ends of the shafts is produced by means of an expandable head. Device according to any one of the preceding claims, characterized in that the drive shafts have at their end an interchangeable end piece making it possible to adapt said shafts to any type of abutment with a winding bar or a tube-shaped mandrel and in that said end piece is associated with a fastening means at the end of the shaft and with means for rotationally connecting with said shaft. Device according to claim 10 characterized in that the end piece has a cylindrical shape and is intended to be introduced into a complementary housing formed in the end of the shaft. Device according to claim 10 or claim 11 characterized in that the means for connecting the end piece in rotation with the shaft are lugs. Device according to any one of claims 10 to 12 characterized in that the end piece comprises an expandable head by means of keys moving radially against the internal face of the mandrel to be driven in rotation under the effect of the advancement of the tree.

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