EP3012216B1 - Turning bar for angular deflection of materials in continuous films - Google Patents

Description

FIELD OF THE INVENTION

The present invention relates to the bars for the angular return of continuous film materials arriving on each of them according to a well-defined incident angle, which circumvent and which depart from them at an angle symmetrical to said incident angle.

BACKGROUND BACKGROUND

The prior art has proposed many angular return rods of continuous film materials.

• des pertes de matière liés à l'étirement des films qui nécessite une compensation de matière à cause du rétrécissement des laizes ;
• des déplacements, des froissements, des plis et des dépliages des matières complexes superposées ou pliées.

Unfortunately, these, despite the various improvements implemented, have some disadvantages related to the friction between the films and bars with the main consequences, because of the tension of the films that results:

• losses of material related to the stretching of the films which requires a compensation of material because of the narrowing of the widths;
• moving, creasing, folding and unfolding complex materials superimposed or folded.

• d'un centreur de bande en sortie ;
• d'un dispositif moteur en entrée et en sortie dans le cas du traitement de matières sensibles (élastiques, fragiles,...).

In addition, all these devices require, for their proper functioning:

• an output tape centerer;
• of an input and output motor device in the case of the treatment of sensitive materials (elastic, fragile, ...).

• un premier, plus particulièrement appliqué aux films perméables, a porté sur la nature et la finition des matériaux constitutifs des barres comme par exemple : l'inox, le chrome dur, le téflon,... ;
• un deuxième, plus particulièrement appliqué aux films imperméables, a porté sur la conception même des barres qui ont été pourvues d'une pluralité dé perforations au travers desquelles passe un air pulsé.

Among the various improvements implemented to reduce friction, that is to say the aforementioned drawbacks, mention may be made of the following lines of research:

• a first, more particularly applied to permeable films, focused on the nature and finish of the materials constituting the bars such as for example: stainless steel, hard chrome, teflon, ...;
• a second, more particularly applied to impermeable films, concerned the very design of the bars which have been provided with a plurality of perforations through which pulsed air passes.

The closest state of the art is described in the US2005 / 277504 patents , EP0437231 and DE4322114 .

SUMMARY OF THE INVENTION

The aim of the invention is to propose a sliding bar that eliminates friction according to a new search axis applicable to both permeable films and films. as well as films made of sensitive materials and complex films (superimposed or folded).

Consequently, all the aforementioned drawbacks (material losses, displacements, creases, folds and unfoldings) are totally eliminated, including the use of an output band centering device and an input and output motor device in the case of the treatment of sensitive materials.

1. a) d'un tambour, animé d'un mouvement rotatif, dont la vitesse de rotation est fonction de la vitesse de déplacement du film ;
2. b) d'une pluralité de bandes transporteuses longitudinales, parallèles entre elles et équidistantes, supportées par ledit tambour, défilant dans le même sens, animées d'un même mouvement de translation, dont la vitesse de défilement, combinée avec celle de rotation du tambour, est déterminée pour accompagner le film dans son déplacement sans le moindre glissement entre les parties en contact.

The bar according to the invention is essentially characterized in that it consists of:

1. a) a drum, driven by a rotary movement, whose rotational speed is a function of the speed of movement of the film;
2. b) a plurality of longitudinal conveyor belts parallel to each other and equidistant, supported by said drum, moving in the same direction, driven by a same translational movement, whose speed of travel, combined with that of rotation of the drum , is determined to accompany the film in its displacement without any slip between the parties in contact.

1. a) les bandes transporteuses longitudinales sont supportées, aux extrémités du tambour, par des rouleaux de renvoi et sont constituées d'une seule bande sans fin entraînée par une paire de poulies motrices elles mêmes entraînées, simultanément et en opposition, par un même dispositif de motorisation ;
2. b) les bandes transporteuses longitudinales, qui défilent dans le même sens, sont supportées aux extrémités du tambour par des rouleaux de renvoi et sont entraînées par une paire de poulies motrices elles mêmes entraînées, simultanément et en opposition, par un même dispositif de motorisation.

According to two embodiments of the invention:

1. a) the longitudinal conveyor belts are supported at the ends of the drum by return rollers and consist of a single endless belt driven by a pair of drive pulleys which are themselves driven simultaneously and in opposition by the same device; motorization;
2. b) the longitudinal conveyor belts, which run in the same direction, are supported at the ends of the drum by return rollers and are driven by a pair of driving pulleys themselves driven, simultaneously and in opposition, by the same motorization device.

PRESENTATION OF FIGURES

The features and advantages of the invention will appear more clearly on reading the detailed description which follows of at least one preferred embodiment thereof given by way of non-limiting example and shown in the accompanying drawings.

• la figure 1 représente, en perspective, la barre complète selon l'invention représentant une film continu en cours de renvoi : elle comporte deux paires de poulies motrices ;
• la figure 2 représente, en perspective, l'ensemble tambour, bandes et poulies extrait de la figure 1.

On these drawings:

• the figure 1 represents, in perspective, the complete bar according to the invention representing a continuous film being returned: it comprises two pairs of driving pulleys;
• the figure 2 represents, in perspective, the whole drum, strips and pulleys extracted from the figure 1 .

DETAILED DESCRIPTION OF THE INVENTION

The bar (1) shown in the figures is intended for the angular return of continuous film materials (2) which arrive thereon according to a well defined incident angle, which circumvent it and which leave it at an angle symmetrical to said incident angle.

1. a) d'un tambour (11), animé d'un mouvement rotatif, dont la vitesse de rotation est fonction de la vitesse de déplacement du film (2) ;
2. b) d'une pluralité de bandes transporteuses longitudinales (12), parallèles entre elles et équidistantes, supportées par ledit tambour (11), défilant dans le même sens, animées d'un même mouvement de translation, dont la vitesse de défilement, combinée avec celle de rotation du tambour (11), est déterminée pour accompagner le film (2) dans son déplacement sans le moindre glissement entre les parties en contact.

It involves :

1. a) a drum (11), driven by a rotary movement, whose rotational speed is a function of the speed of movement of the film (2);
2. b) a plurality of longitudinal conveyor belts (12), parallel to each other and equidistant, supported by said drum (11), moving in the same direction, driven by a same translational movement, whose scrolling speed, combined with that of rotation of the drum (11), is determined to accompany the film (2) in its displacement without the slightest slip between the parts in contact.

According to a first embodiment of the invention, the longitudinal conveyor belts (12) are supported at the ends of the drum (11) by return rollers (13) and consist of a single endless belt driven by a pair of driving pulleys (14) and (15) themselves driven, simultaneously and in opposition, by the same motorization device (16).

According to a second embodiment of the invention, the longitudinal conveyor belts (12), which run in the same direction, are supported at the ends of the drum (11) by return rollers (3) and consist of at least two strips. endless (121) and (122), identical, each driven by a pair of driving pulleys (14,15) themselves driven, simultaneously and in opposition, by the same motorization device (16).

• le tambour (11) comporte des rainures longitudinales conçues pour guider et maintenir parallèles entre elles les bandes transporteuses (12) ;
• chaque paire de poulies motrices (15,16) est entraînée par un pignon conique satellitaire.

According to particular features of the invention:

• the drum (11) has longitudinal grooves designed to guide and hold the conveyor belts (12) parallel to each other;
• each pair of driving pulleys (15, 16) is driven by a satellite cone gear.

The drive shaft of the drum carries the reference (17) and that of driving the pulleys is referenced (18).

The drive device of the drum carries the reference (19).

In the preferred embodiment of the invention, the conveyor belts are divided into 2 groups of 10 each driven by 2 pairs of pulleys as shown in FIGS. Figures 1 and 2 .

For example, an incident angle of 45 ° allows a 90 ° return.

Among the permeable films treated by the device according to the invention, mention may be made, in a nonlimiting manner, of woven or woven materials.

Among the impervious films treated by the device according to the invention, mention may be made, in a nonlimiting manner, of materials made of paper, polyethylene, polypropylene.

Among the conveyor belts used, mention may be made, in a nonlimiting manner, those made of polyurethane, polyester, etc.

Of course, those skilled in the art will be able to carry out the invention as described and represented by applying and adapting known means without it being necessary to describe them or to represent them.

It may also provide other variants without departing from the scope of the invention as determined by the content of the claims.

Claims (5)

1. Bar (1) intended for the angular deflection of materials made of continuous films (2) that arrive on the latter according to a well-determined incident angle, which circumvents it and which leaves therefrom according to an angle symmetrical to the incident angle;
   said deflecting bar (1) being comprised:

   a) of a drum (11), driven by a rotating movement, of which the speed of rotation is according to the displacement speed of the film (2);

   b) of a plurality of longitudinal conveyor belts (12), parallel to one another and equally distant, supported by said drum (11);

   characterised in that said plurality of longitudinal conveyor belts (12) scroll in the same direction and are driven by the same translation movement, of which the scrolling speed, combined with that of the rotation of the drum (11), is determined in order to accompany the film (2) in its displacement without the slightest sliding between the portions in contact.
2. Bar, according to claim 1, characterised in that the longitudinal conveyor belts (12) are supported, at the ends of the drum (11), by deflecting rollers (13) and are comprised of at least one single endless belt driven by at least one pair of drive pulleys (14, 15) themselves driven, simultaneously and in opposition, by the same motorisation device (16).
3. Bar, according to claim 1, characterised in that the longitudinal conveyor belts (12) are supported at the ends of the drum (11) by deflecting rollers (13) and are comprised of at least two identical endless belts (121) and (122), each one driven by a pair of drive pulleys (14, 15) themselves driven, simultaneously and in opposition, by the same motorisation device (16).
4. Bar, according to claim 1, characterised in that the drum (11) comprises longitudinal grooves designed to guide and maintain the conveyor belts (12) parallel between them.
5. Bar, according to claim 3, characterised in that each pair of drive pulleys (14, 15) is driven by a satellite bevel gear.

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