EP1588968A1 - Module for supporting and driving a web material wound on a bobbin for a processing machine - Google Patents

Abstract

The module has a carrier structure (5) with bobbin stands (10), where each stand supports a bobbin (6). Bobbin driving devices (20) are mounted freely in rotation on their respective bobbin stands. The bobbin stands are independently removable from one another and are adjustable along a bar (15) maintained between walls (3, 4) of the carrier structure. A bobbin driving belt (16) couples multiple feed spindles (40).

Description

The present invention relates to a support module and driving a wound web material for a machine, especially for a machine intended for the use of metallized strips for manufacturing packaging.

Such a machine is used for embossing and pressure transfer of portions of films, preferentially metallic, resulting from such bands on a substrate of paper, plastic or cardboard more particularly. These operations are for example performed in a machine equipped with a platen press working plate elements, such as leaves of cardboard, for the stamping of given motifs. These reasons being from a metallized strip conducted between the plane of scrolling of the plate elements and the upper bed base of the press. In a periodic vertical movement, the bed base lower moving will press the metallized strip against each cardboard sheet between clichés and corresponding counterparts to deposit gilding correspondence with the reasons for the photographs. Once the realized transfer, the lower bed base descends and the stamped cardboard sheet is removed from the press at platinum to make room for a new leaf. In the same time interval, the metallized strip is moved so that a new virgin surface is matching with clichés. The process of cutting and transfer of the tape can then be say again.

Such a machine can also be used for cutting of cardboard sheets according to a sequence of operations make each one in an adjacent station. This suite of operations usually includes the introduction of the sheet in the press, its cutting by tools arranged on the plate, the ejection of waste by tools specific and receipt in stacks of sheet elements cut. In order to optimize the possibilities of such machine, it is known to be able to transform it so as to what the station originally planned for cutting become a stamping station of metallized strips by replacing cutting tools in a device stamping and replacing station tools ejection into a loading and unwinding device reels of metallized strips. Such a transformation is illustrated by the machine described in EP 741'096.

The arrangement in the ejection station of a device loading and unwinding of tapes within a Such machine is described in detail in EP 741'095. This device includes a pair of arms parallel vertical lines between which are arranged sleepers serving as supports for a plurality of coils of metallized bands. The widths of these bands being typically of the order of 5 to 20 cm. It should be noted that these metallized strips bearing patterns, or bands called diffraction bands, are generally performed by depositing, by printing, a decorative layer metal on a substrate made of a material flexible, for example a plastic material. By their manufacturing, these metallized strips have a thin connecting line from the cylindrical plate bearing the printable pattern that can not, obviously, cover the 360 ° of the forme cylinder. As a result, this thin line will appear at each turn of the cylinder and it must be avoided that this line of connection between conflict with one of the reasons to be stamped.

Due to the transverse arrangement of the axes of rotation of the coils with respect to the longitudinal axis of the machine, the unwinding of the tapes is parallel to the direction of scrolling leaves to stamp. Transport of these tapes require means of unwinding and advance intermittent generally consisting of rollers against which the strips are pinched by pebbles pressers. The motorized drive of these rollers allows the intermittent advance of these bands. Following the profiles of desired speed, there may be several rolls in advance which allow each band to benefit from a independent training. When using tapes wider, it is also necessary to provide several pressure rollers per belt. These pressure rollers are slidably mounted on transverse axes of so that their positioning can be done in any independence. However, the assembly formed by the device loading and supporting rolls, rolls of referrals, the drive rollers, their motorization as well as the pressure rollers adjustable in position requires the implementation of substantial work when is to develop such a device within a machine of cutting to make it into a machine stamping. Can not be done in masked time, these transformation works immobilize the machine during long hours and contribute to the rising cost of future production, mainly in small series.

Although the majority of gilding deposited on packaging can be made from narrow width, generally not exceeding 30 cm, it is sometimes necessary to use metallized strips of greater width, typically of the order of 50 to 70 cm, or to a plurality of narrower bands arranged side by side coast and whose cumulative total width is around this order of magnitude.

However, the use of large coils poses handling problems in particular. Because of the weight that represent these reels, it is obviously no longer possible to move them to man's arms to arrange them in the machine. It is therefore necessary to resort to such as hoists or small vehicles capable of easily move heavy loads. However, the implementation place such coils by these means makes the delicate machine manipulations, sometimes even impossible, either for lack of space around the machine, either because of an impossible access inside the machine not provided for such means.

The object of the present invention is to remedy, least in part, to the aforementioned drawbacks by suggesting a new module for supporting and training a material made of tape for a machine working it. For these purposes, the object of the present invention must provide optimum access for loading and unloading of even large reels sizes, by any conventional means whatsoever. The handling of such coils should neither be limited nor made impossible by a nearby restricted space or by a path impossible. The object of the present invention must also allow its preparation in masked time so to reduce as much as possible the downtime of the machine being processed. He must offer a quick and user-friendly convertibility of the machine cutting into a stamping machine and vice versa. He must also be able to offer greater flexibility as to the arrangement of optional members or devices, such as, for example, detecting members of the lines of existing connection on the metallized strip, or on the strip diffraction, devices requiring spatial distances important. Finally, it must be able to be easily adaptable to cutting machines that have never before been transformed into stamping machines.

These goals are achieved by the present invention which has for object a module of support and training of a wound strip material, in accordance with the claim 1.

La figure 1 est une vue en perspective de face du module de l'invention.

La figure 2 est une vue en perspective depuis l'arrière d'une partie de l'objet de l'invention illustrant un porte-bobine agencé sur une barre transversale, un dispositif d'entraínement associé ainsi qu'une chaíne cinématique préférée.

La figure 3 est une vue partielle et en perspective d'un détail d'une variante de l'illustration donnée à la figure 2.

La figure 4 est une vue simplifiée, en perspective de face, du module de l'invention.

The invention will be better understood from the study of a preferred embodiment, taken in a non-limiting manner and illustrated by the appended figures in which:

Figure 1 is a front perspective view of the module of the invention.

Figure 2 is a perspective view from the rear of a portion of the object of the invention illustrating a reel holder arranged on a crossbar, an associated drive device and a preferred kinematic chain.

FIG. 3 is a partial view in perspective of a detail of a variant of the illustration given in FIG.

Figure 4 is a simplified view, in front perspective, of the module of the invention.

FIG. 1 shows the object of the present invention, given from the front, which consists of a module 1, independent, located entirely outside an adjoining non Illustrated who works a material in band. It is therefore expected that this module be disposed out of this machine and out of its longitudinal axis, preferentially to the height of the ejection station normally provided for in any efficient cutting machine. This station will have been transformed for the occasion into an arranged space of rolls of references arranged for example at 45 ° with respect to the longitudinal axis of the machine. As a result, it is planned that the band (s) from this module 1 can enter in said machine by its side, through a window open in one of the side walls of its frame, before to be deflected by said rolls of references in tracking with the longitudinal axis of this machine.

The module 1 comprises a frame formed of a base 2 and of two side walls 3, 4 constituting a structure bearing 5 especially for a plurality of coils 6 from which said strip material originates. Each coil is supported by a reel holder 10 and is driven by rotation by at least one training device 20.

Figures 2 and 3 show in more detail since the rear, one of the drive members 20 as well as the spool holder 10 associated with this device. This spool holder is consists of two flanges 11 that support the coil 6 by its hub 7. This coil is mounted free in rotation by means of flanges 11, each arranged on a 12. These supports are fixed in turn on a rod 15 by means of clamping member 13, such as knurled screws or chickens for example. The roll holders 10 are adjustable along this bar 15 which, as illustrated in Figures 1 and 2, is preferably of square section and is supported in its ends by the walls 3 and 4 of the supporting structure 5. With such removable bobbin carriers 10 independently from each other, it is possible to adjust, place and to easily remove a coil 6 from module 1 without having to move other reels already in place. However, variant, it would however be possible to foresee a reel holder that is directly constituted by a tree on which would be disposed successively the different coils.

With reference to FIGS. 2 and 3, the device 20 comprises two cheeks 21, 22 between which rotates a belt 16, endless, better visible in Figure 3. This belt is arranged to it is always in contact with a rear portion of the outer circumference of the spool 6. By friction with this cylindrical portion, the coil is rotated by the action of the belt 16 and therefore, the web material may be unwound for the purpose of its use in an adjoining machine, or even the reverse rolled up if it comes from this machine.

The cheeks 21, 22 are held together by spacers 23 and in particular allow the arrangement of a drive member 24 for the rotation of the belt 16. From this drive member, the belt respectively run around a tensioner roller 25, then around a plurality of return rollers 26 including a roller lower deflection 27 located at the lower end of the course little below the coil 6, before going back up up to the drive member 24 by bearing against a cylindrical portion of the spool 6. When the material in tape is unrolled from the reel, the diameter of this last decreasing, the length of the course of the belt located between the lower idler 27 and the training 24 is constantly varied. The stone tensioner is intended to compensate for these variations. To do this, it is slidably mounted on along an oblong opening 28 and is connected to a mechanism tensioner 30. This mechanism may be provided with a means elastic, such as a tension spring 31 for example, connected to the tensioner roller 25 by a rope 32.

As best seen in Figure 2, the device 20, adjustable between the walls 3, 4 of the supporting structure 5, is supported in one of its ends on a support bar 29 and at the other end through the drive member 24. The support bar 29 is held fixed between the walls of the structure 5. The training member 24 is preferably constituted by a ring crossed by a advance tree 40. This advance tree is also found maintained between the side walls 3, 4 of the module 1 and finds connected at one of its ends to an engine 41 by an advance belt 42. It is this engine electrical that will be able to control the device (s) 20 adjacent training associated with the same tree in advance 40, through the drive members 24 correspondents.

Advantageously, the supporting structure 5 is mounted on wheels 8 to increase the mobility of the module 1 and to authorize, if necessary, his removal to a clear space, free of any clutter. As illustrated in Figure 1, the module of the present invention is provided with a plurality of coils 6 distributed over two stages. However, it should be noted that another provision of these coils, on one or more floors, could be also adopted. As shown in Figure 1, the number of training devices per coil may vary to will, depending on the width of the band, its length unwound, its diameter or the rate of training by example. Thus, the drive performance of the coils can be significantly increased by using several driving devices for driving the reels. The coupling of several devices on the same coil allows also to better control the effect of inertia that can produce this coil when it is rotated and this fact also allows advance speeds that can be faster.

To improve the performance of the training of coils, it is also possible, by means of belts for example, to couple several trees in advance 40 between them so as to increase the power mechanical drive applied to certain coils. it can be particularly useful when 41 engines are sized to deliver average power while would need to be able to benefit from greater power in the case of driving a very reel large diameter for example.

According to the embodiment described so far, the coils 6 which are arranged on the same advance shaft 40 are driven simultaneously by the same motor 41. However, as a variant it would be perfectly possible to make the training of each of these coils independent so as to multiply the number of speeds and different training rates than module 1 could restore simultaneously. For this purpose, it would be possible to perfect the advance trees 40 so that they are not made of a single tube but of a plurality of concentric tubes of diameters different rotatably mounted independently of each others on successive bearings integral with these tubes. So it would be possible to get a compound advance tree different sections, each of which can be driven in an independent way. Another embodiment would consist of providing some or all of the devices of training 20 of an electric motor 41 specific to each 16. Thus, each drive member 24 of each drive device 20 could be driven by an independent electric motor 41, which is for example directly embedded on the training device itself. Such an arrangement would then make it possible to drive a differentiated way the unwinding of the coils concerned in order to be able to benefit from speeds and cadences distinct according to the specific needs of these coils.

Thanks to the characteristics that the object of the present invention, it becomes possible to access without no difficulty to all the trees in advance and to all the reel. Thus, the use of means of such as pallet trucks, elevators or hoists, for example, can advantageously be contribution for the loading / unloading of the coils without fear that access to it will be limited, difficult, or even impossible. The release available around the module of the present invention thus offers perspectives technical and ergonomic unthinkable previously with a confined module inside the machine working the strip material.

Advantageously, the concept of a unit external to the machine allows to multiply the possibilities that can offer such a module compared to a device of loading of reels installed within the machine. AT For example, the diameter of the coils of the material in band or the number of trees carrying these reels is not limited by a finite volume, determined by space available in machine between the walls of its frame. In option, it would also be possible to provide special arrangement for heavy coils, very large diameter, namely of the order of 400 mm. For this purpose, he would be desirable if such an arrangement could take place at the bottom of the module, the closer to the ground so by example, the lifting stroke of a pallet truck is sufficient to put the coil in place more easily question.

Advantageously, the drive of the coils such as provided in the module of the present invention, does not require no adjustment during production. This is not usually the case in current systems that use mechanical brakes to control the inertia of reels during each gear change.

Advantageously, because of its position outside machine, the module of the present invention is entirely accessible as much for preparatory work of a future work only for maintenance operations. Thus, it becomes possible to work in masked time on the module, without requiring the immobilization of the machine when it is working on cutting work.

Thanks to the offshoring out of the machine the function of unwinding or winding of the web material, it becomes advantageously possible to keep in the machine part of the devices and organs used when the machine is provided for a cutting-ejecting configuration garbage. Thus, the transformation of the machine a planned configuration for cutting and ejecting in a new configuration planned for stamping and conversely, it is all the more facilitated and quicker to enforce. Also, it will be noted that the modification and the adaptation of cutting machines without a system stamping is also made easier.

Among the many advantages that the arrangement offers off machine of such a module, we will mention again that on the one hand, the place thus released in a machine makes it possible to be exploited for other purposes for adaptation and layout various options and that on the other hand, the clearance the surrounding area of the module can also be operated to add a whole range of organs additional. Among these bodies, there will be exemplified narrow belt drives for low coils width, additional axes of roll unwinding mounted on original trees, or, as well as represented in FIG. 4, reading cells 45, 46, 47, 48 for the detection of patterns or particular band fittings such as holograms or those called diffraction effect. For this which is the latter case, it will be mentioned that the reading and the identification of fittings and holographic patterns of diffraction bands requires a race of setting the optical cells 45 to 48 much more important that in the case of reading only positions of holographic patterns. For this purpose, and for obtain sufficient clearance allowing compliance with optimal distances, the reading cells 45 to 48 are arranged so as to slide respectively the along the vertical bars 49, 50, 51, 52. The bars 49 to 52 are mounted so that they can be slide laterally, on two crosspieces 53, 54 carried by supports 55 and 56 fixed to the walls 3 and 4 of the load-bearing structure 5. Currently, in the modules confined within these machines, it is often not possible to obtain sufficient clearance allowing respect these optimal distances. Now, thanks to the object of the the present invention, the external module can advantageously to support this kind of ancillary devices without one is restricted to a limited surrounding space.

It should be noted that the module as described is preferentially used as unwinding module for to transfer a material in a strip from this module to a machine working it. Now, we will notice that the progress reverse could if necessary be perfectly obtained with the same module by simply reversing its initial function of unwinding module in a winding module for material in used tape for example.

Finally, we will specify that by the name matter in band, we mean to cover both the use of a single band, of great width for example, that a plurality strips or strips placed next to each other with or without interstitial spaces. Also, although machine in which has been described the device of the present invention clearly refers to a press in platinum working plate elements, we will mention that the use of this device is in no way limited to such machines.

Many improvements can be made to device of the present invention in the context of claims.

Claims (9)

Module (1) for supporting and driving a wound strip material for a machine working it, said module (1), located entirely outside said machine, comprising a supporting structure (5) in which a plurality of reel carriers (10) each of which supports at least one spool (6), characterized in that it comprises at least one drive device (20) of the spools (6) mounted free to rotate on their spool carrier (10). ) and that it comprises at least one additional unit for treating the strip material. Module (1) according to claim 1, characterized in that said reel carriers (10) are removable independently of each other and are adjustable along at least one bar (15) held between walls (3, 4) of said supporting structure (5). Module (1) according to claim 1, characterized in that the drive device (20) is adjustable laterally between the walls (3, 4) of the supporting structure (5) and in that it comprises a belt (16). ) rotating the coil (6) of the carrier (10) which is associated with it by means of a drive member (24) driven by an electric motor (41). Module (1) according to claim 3, characterized in that the drive members (24) of several adjacent drive devices (20) are driven by the same electric motor (41) by means of a feed shaft (40) connecting said drive members (24). Module (1) according to claim 4, characterized in that a plurality of advance shafts (40) are coupled together in order to increase the mechanical drive power transmitted to the coils (6). Module (1) according to claim 4, characterized in that each drive member (24) of each drive device (20) is controlled by an independent electric motor (41). Module (1) according to claim 3, characterized in that said belt (16) comes into contact with a portion of the circumference of the coil (6) and in that this belt (16) is constantly stretched by the action of a tensioning roller (25) arranged within the drive device (20). Module (1) according to claim 1, characterized in that the supporting structure (5) is provided with rollers (8). Module (1) according to claim 1, characterized in that the additional unit for treating the strip material is constituted by specific reading cells (45, 46, 47, 48) for the detection of patterns or connections of particular bands, such as holograms or diffraction bands, said reading cells (45 to 48) being slidably arranged respectively along vertically mounted bars (49, 50, 51, 52), also able to slide laterally on two crosspieces (53, 54) carried by supports (55, 56) fixed to the walls (3, 4) of the supporting structure (5).

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