EP1026363B1 - Security device against the lifting of roller shutters - Google Patents

Abstract

Anti-winding safety device has cheek web (8) integral the shutter winding shaft (3) and positioned on edge of shutter (1). Connecting rod (10) articulated on cheek web and shutter upper slat (2) pivots between radially deployed position obtained in shutter bottom unwound opposition and retracted position against winding shaft during winding of shutter. Stop (13,16) automatically locks connecting rod relative to cheek web in its radially deployed position.

Description

The invention relates to a flap anti-lift device rolling, allowing to block said flap when it is deployed in the corresponding opening.

• un tablier constitué d'une pluralité de lames articulées les unes par rapport aux autres,
• un arbre d'enroulement d'axe de rotation (x), relié par des moyens d'attache à une des lames, dite supérieure, du tablier, et généralement logé dans un coffre comportant une sous-face présentant une fente longitudinale apte à permettre le passage du tablier,
• des moyens d'entraínement en rotation de l'arbre d'enroulement aptes à permettre de dérouler le tablier vers une position basse déployée où il obture l'ouverture correspondante, et d'enrouler ce tablier vers une position haute où ce dernier est enroulé sur sa plus grande longueur autour de l'arbre d'enroulement et dégage l'ouverture,
• et des moyens de guidage du tablier, en particulier des glissières latérales disposées de part et d'autre de l'ouverture de façon à loger les extrémités latérales des lames lors des manoeuvres du tablier et à assurer le guidage de ces dernières.

Current roller shutters typically include:

• an apron made up of a plurality of blades articulated with respect to each other,
• a winding shaft with an axis of rotation (x), connected by means of attachment to one of the blades, called the upper one, of the deck, and generally housed in a trunk comprising an underside having a longitudinal slot capable of allowing the passage of the apron,
• means for driving in rotation of the winding shaft capable of allowing the deck to be unwound towards a deployed low position where it closes the corresponding opening, and to wind this deck towards a high position where the latter is wound on its greatest length around the winding shaft and clears the opening,
• and means for guiding the apron, in particular lateral slides arranged on either side of the opening so as to accommodate the lateral ends of the blades during the maneuvers of the apron and to guide the latter.

The major drawback of such types of roller shutters is that they can be easily lifted from the outside, and that therefore they do not offer any guarantee against a possible breaking in.

To overcome this drawback, various types have been devised locking devices to prevent lifting of the bulkhead from the outside when it closes the corresponding opening, and to authorize the winding of this deck using the rotational drive means of the winding shaft, without requiring any specific prior maneuver in order to get the unlock.

A first type of locking device, described in patents CH-A-645,340 and DE-U-9,303,720, includes a retaining member adapted to extend in the upper extension of a lateral slide, and designed so that when the curtain is raised, the blade upper blocking under this organ thus causing locking in deployed position of said deck. The advantage of such a device is that it is simple design and therefore low cost.

However, the major drawback of this type of device of locking resides in the fact that it imposes to authorize a play between the bottom of the deck and the threshold of the opening in order to obtain a correct positioning of the upper blade guaranteeing its effective cooperation with the retaining member. Therefore, it is therefore easy to introduce an object under the lower blade of the deck and, by a leverage effect, to exert a force making it possible to lift said apron.

In addition, such locking devices are arranged in lateral overhang in relation to the deck, so that they cannot be fitted to the boxes of current monobloc rolling shutters pre-equipped in the factory.

Indeed, such monobloc safes are designed so as to have the smallest possible width, and therefore have a space between the cheeks and the ends of the rolled up apron, reduced so optimal, unsuitable for housing a locking device.

To overcome these drawbacks, devices have been designed locking, as described in particular in German GM 91.01307 and in patent FR 2,696,779, in which the winding shaft is connected to the deck by a set of arched shells hinged relative to each other, designed to so as to form, in the deployed position of the apron, a lever coming under a fixed stop, adapted to prevent lifting from the outside of the deck.

However, such locking devices have several disadvantages. Indeed, they are relatively complex and their installation significantly increases the total cost of the shutter. In addition, when setting up on site, any adjustment imposed by the frequent variations in height between the winding axis and the support of opening, leads to the complete dismantling of the roller shutter in order to adapt the position of the locking device, and the installation of such roller shutters is therefore long and delicate. Finally, it should be noted that the design of such locking devices which consists in connecting the winding shaft to the deck by a set of shells leads to an increase in the diameter of the deck in its rolled up position and, for a trunk of given dimensions, at a limitation of the winding diameter.

This last drawback is also almost common to all current locking devices so that the dimensions roller shutter boxes must be adapted to those of the roller shutters.

A third type of locking device, described in French patent FR-2 753 742 has made it possible to overcome several of the drawbacks of the locking devices described above. The latter includes, at the level of each edge of the deck, a lateral attachment pin secured to the blade upper of said apron, adapted to be introduced into a recessed light in a flange integral with the winding shaft, said lumen having a guide profile of the latching pin during the maneuvers of the deck, and being provided with a locking section of said latching pin in the low position said apron.

First, such a locking device does not has no elements encroaching on the winding volume of the deck. Of more, the only element arranged in lateral projection of the apron consists of a flange of thin, as conventionally used in one-piece cases for ensure, at the exit of the slides, the guiding of the deck including the blades, for reasons of gain in width, are devoid of connecting end pieces capable of avoiding their relative sliding. This locking device can thus equip the current one-piece safes.

By cons, such a locking device has also disadvantages. First of all, the principle of this locking device which consists in guiding the latching pin along a cam profile, requires, as described on page 9, lines 16-29 of the patent, to provide a range of cam profiles and therefore flanges, each adapted to the type of blades constituting the deck. In addition, the attachment pin is brought, not to slipping regularly in the light, but moving suddenly between the ends of the light sections in which it is located, so that the apron moves in a jerky fashion at the end of the course and at the start winding, which could lead to believe in a dysfunction that is not reassuring for the user. Finally, according to this principle, the pawn can escape from the light leading, if not to a fall of the apron, at least to a blockage of the latter.

The present invention aims to overcome the drawbacks of this locking device, and aims to provide an anti-lift device roller shutter, on the one hand having the advantages of said device locking (no encroachment on the winding volume, possibility equip one-piece safes) and on the other hand, leading to displacement smooth smooth apron.

Another object of the invention is to provide a device anti-lift ensuring the guiding of the blades at the exit of the slides.

Another object of the invention is to provide a device anti-lift designed to allow the front apron to settle blocking of the latter.

Another object of the invention is to provide a device anti-lift that does not interfere at any time in the classic operation of the roller shutter.

Another object of the invention is to provide a device anti-lift, the settings of which are very easy when laying on site.

• au moins un flasque destiné à être solidaire de l'arbre d'enroulement, et positionné de façon à s'étendre en bordure d'un des côtés latéraux du tablier,
• associé à chaque flasque, une biellette destinée à être positionnée latéralement en bordure du tablier, et articulée autour de deux axes solidaires respectivement de la lame supérieure dudit tablier et dudit flasque, lesdits axes étant ménagés de façon que la biellette pivote entre une position radialement déployée obtenue dans la position basse déroulée dudit tablier, dans laquelle la distance radiale entre l'axe solidaire de la lame supérieure et l'arbre d'enroulement est supérieure à celle entre l'axe solidaire du flasque et ledit arbre d'enroulement, et une position radialement escamotée contre l'arbre d'enroulement obtenue lors de l'enroulement dudit tablier,
• des moyens de butée de blocage automatique de chaque biellette relativement au flasque correspondant dans la position radialement déployée de ladite biellette.

To this end, the invention relates to an anti-lift device for rolling shutters as described in the preamble above, characterized in that it comprises

• at least one flange intended to be integral with the winding shaft, and positioned so as to extend at the edge of one of the lateral sides of the deck,
• associated with each flange, a link intended to be positioned laterally at the edge of the apron, and articulated around two axes secured respectively to the upper blade of said apron and said flange, said axes being arranged so that the link pivots between a radially deployed position obtained in the unrolled low position of said apron, in which the radial distance between the axis integral with the upper blade and the winding shaft is greater than that between the axis integral with the flange and said winding shaft, and a radially retracted position against the winding shaft obtained during the winding of said deck,
• automatic locking stop means of each link relative to the corresponding flange in the radially deployed position of said link.

According to the invention, the upper blade of the deck is connected to at least one flange secured to the winding shaft by means of a link articulated on said flange and upper blade, so as to deploy radially at the end of the unwinding of said deck, and to retract against the shaft winding, at the start of winding said deck. In addition, the means of automatic locking stop of each link allow, at the end of unwinding, to first obtain a settlement of the deck, then the blocking of the latter in its packed position.

According to this principle, and first of all, the upper blade of the deck driven by the link is not required to follow an imposed trajectory by a cam profile, but moves, on the contrary, regularly and without shots along a natural spiral path (portion of a spiral) at the end of unwinding and beginning of winding, so that the operation of the shutter rolling is in no way affected by the presence of the anti-lift device.

Furthermore, this anti-lift device does not have any element encroaching on the volume of winding of the deck around the shaft winding, so that, for a given boot volume, there is a optimal winding capacity.

In addition, the flange / link assembly has a very low overall thickness allowing it to be integrated into roller shutter boxes without require a large space between the cheek of the chests and the end of the apron wound.

• chaque flasque est percé d'une lumière, dite lumière de guidage, présentant la formé d'un secteur circulaire centré sur l'axe de rotation,
• chaque biellette est articulée sur un flasque autour d'un axe, dit axe mobile, logé dans la lumière de guidage dudit flasque, lesdits axe mobile et lumière de guidage étant ménagés de façon que l'axe mobile soit en butée contre une des extrémités de la lumière de guidage dans la position radialement déployée de la biellette, et se déplace en direction de l'autre extrémité de ladite lumière de guidage en début d'enroulement du tablier.

According to an advantageous embodiment:

• each flange is pierced with a light, known as a guide light, having the shape of a circular sector centered on the axis of rotation,
• each link is articulated on a flange around an axis, called the mobile axis, housed in the guide light of said flange, said mobile axis and guide light being arranged so that the mobile axis is in abutment against one of the ends of the guide light in the radially deployed position of the rod, and moves in the direction of the other end of said guide light at the start of winding of the deck.

According to this principle, and at the start of winding and at the end winding, the movable axis of each link is caused to move in the guide light of the corresponding flange. According to this provision, the weight of the apron is therefore never supported by the rods, even in the phases of above operation where the latter and the attachment means follow different trajectories.

In this way, we prevent the deck from being supported temporarily only at two distant ellipsis, and we rule out therefore any risk of deformation of said apron, in particular when it presents a relatively large length.

In summary, thanks to this arrangement, the device anti-lift ensures the only locking function of the bulkhead, in the position course of the latter; while the weight support function of said apron is conventionally and only ensured by means of fasteners connecting the blade higher than the winding shaft.

According to an advantageous embodiment aimed at facilitating mounting each link on the flange, the movable axis comprises a head guiding and lateral retention of said axis in the guide lumen of said flange. In addition, the guide light is then extended, at one of its ends, by an orifice of cross section conjugate with that of the head of the movable axis, of introduction of the latter, said orifice being adapted to be closed by a shutter, once the movable axis introduced into said guide lumen.

This guide light also forms advantageously, a circular sector with an apex angle of between 90 ° and 180 °.

The stop means include advantageously, for each link, a front face, called posterior, of said rod intended to be positioned opposite the axis integral with the upper blade, shape adapted to come and tangent and lock against the winding shaft, in the radially deployed position of said link.

These abutment means can also advantageously understand, instead of or in addition to those mentioned above for security purposes, mounted on each flange, an integral blocking stop of said flange, positioned so as to form a toggle joint with the axes of articulation of the link and to ensure the locking of said toggle in the deployed position of said link.

In addition, the anti-lift device then comprises advantageously means for adjusting the position of the locking stop, able to adjust the locking position of said link.

Such adjustment means make it possible to refine easily on site the positioning of the locking stop so as to ensure that the deck is blocked after it has been compacted.

According to an advantageous embodiment, the link has a portion of convex outline relative to the movable axis, provided a notch capable of housing the locking stop. In addition, the adjustment means of the position of said stopper are adapted to allow its position to be adjusted on along a circular path centered on the axis of rotation (x) and intersecting by relative to the notch in the deployed position of the link.

To optimize the size of the anti-lift device and in particular allow the latter to be integrated into one-piece safes, each flange is advantageously intended to be arranged so as to substantially tangent the side lateral opposite the apron, said flange having a recess forming a notch of suitable shape to accommodate the rod during pivoting of this last between its deployed and retracted positions.

In addition, the recess of each flange presents preferably a combined depth of the thickness of the link.

According to this preferred embodiment, the thickness overall of the flange / link assembly is equivalent to the thickness of the flange itself, the latter being, moreover, arranged so as to guide the blades of the deck at the exit of slides.

Thus, such an anti-lift device can equip monobloc shutters for roller shutters fitted in particular with aprons with slats are devoid of connecting end pieces.

According to another characteristic of the invention, the recess of each flange and each link have oblique profile edges, of so as to guarantee a smooth sliding of the ends of the deck slats on said flange and rod.

In addition, the anti-lift device is notably intended to equip classic type aprons each blade of which has lower and upper articulation profiles on the juxtaposed blades. In this case, and advantageously, in order to facilitate the attachment of the blade upper of the apron on each link, the hinge axis of each link on the upper blade of said apron has a sleeve perpendicular to said link, of a shape adapted to snap onto the upper profile of said upper blade with freedom of rotation relative to the latter.

In addition, the device advantageously comprises a cylindrical intermediate sleeve of internal shape adapted to snap on the upper profile of the upper blade, the sleeve integral with the link having a cylindrical shape combined with that of said sheath.

According to an advantageous embodiment aimed at facilitating the mounting the roller shutter, each flange has an axial shaped sleeve adapted to be housed in the end section of the winding shaft and means for fixing said winding shaft to said sleeve.

In addition, advantageously, each sleeve forms a bearing capable of accommodating a connecting axis of the winding shaft with the trunk roller shutter.

• la figure 1 est une vue en perspective partielle d'un volet roulant représenté schématiquement dans la position déroulée du tablier, équipé d'un dispositif anti-relevage conforme à l'invention,
• la figure 2 est une vue en perspective simplifiée de ce volet roulant avant assemblage de l'arbre d'enroulement et du flasque,
• la figure 3 est une vue en perspective éclatée d'une biellette conforme à l'invention et de la lame supérieure du tablier de volet roulant,
• la figure 4 est une vue frontale de cette biellette,
• et les figures 5 à 11 sont des coupes schématiques par un plan vertical A représentant les positions successives de la biellette et du tablier de volet roulant, en début d'enroulement à partir d'une position déroulée dudit tablier représentée à la figure 5.

The detailed description follows with reference to the accompanying drawings which show by way of nonlimiting example a preferred embodiment. In these drawings:

• FIG. 1 is a partial perspective view of a rolling shutter shown diagrammatically in the unrolled position of the deck, equipped with an anti-lifting device according to the invention,
• FIG. 2 is a simplified perspective view of this rolling shutter before assembly of the winding shaft and the flange,
• FIG. 3 is an exploded perspective view of a link according to the invention and of the upper blade of the roller shutter curtain,
• FIG. 4 is a front view of this link,
• and FIGS. 5 to 11 are diagrammatic sections through a vertical plane A representing the successive positions of the link and of the roller shutter curtain, at the start of winding from a position unwound from said curtain shown in FIG. 5.

• - un tablier 1 constitué d'une pluralité de lames telles que 2, dont une lame supérieure 2a, articulées les unes par rapport aux autres,
• un arbre d'enroulement 3 logé dans un coffre dont est représentée principalement une des joues 4,
• des moyens d'attache telle que des bandes souples 20 reliant l'arbre d'enroulement 3 et la lame supérieure 2a du tablier 1, aptes à solliciter ladite lame supérieure dans la position déroulée dudit tablier de façon à amener l'ensemble des lames 2 dans un même plan vertical,
• des moyens d'entraínement en rotation (non représentés) de l'arbre d'enroulement 3,
• et deux coulisses latérales en forme de U, telles que 7, disposées de part et d'autre de l'ouverture de façon à loger les extrémités latérales des lames 2 lors des manoeuvres du tablier 1 et assurer le guidage de ce dernier.

The anti-lift device shown in FIG. 1 is intended to equip a rolling shutter of the conventional type mainly comprising:

• an apron 1 consisting of a plurality of blades such as 2, including an upper blade 2a, articulated with respect to each other,
• a winding shaft 3 housed in a trunk of which one of the cheeks 4 is mainly represented,
• attachment means such as flexible strips 20 connecting the winding shaft 3 and the upper blade 2a of the deck 1, adapted to urge said upper blade in the unrolled position of said deck so as to bring all the blades 2 in the same vertical plane,
• means for driving in rotation (not shown) of the winding shaft 3,
• and two U-shaped lateral slides, such as 7, arranged on either side of the opening so as to accommodate the lateral ends of the blades 2 during the operations of the deck 1 and to guide the latter.

The anti-lift device shown in Figure 1 comprises, firstly, on either side of the deck 1, a circular flange 8 provided with an axial sleeve 30 of shape conjugate to that of the winding shaft 3, able to be housed in the latter so that said flange tangents the side lateral opposite the apron during its maneuvers, and guides the blades 2 behind the scenes 7.

The connection between the sleeve 30 and the winding shaft 3 is ensured by any system known per se such as screws, clipping system or ergotage ...

In addition, the sleeve 30 forms a bearing inside which is housed an axis 31 connecting the winding shaft 3 with the cheeks 4 of the rolling shutter box, axis 31 around which said shaft therefore freely rotates winding.

Conventionally, this axis 31 can be linked in translation with the flange 8 or be telescopic like the different shaft ends of current roller shutters.

In addition, instead of this axis 31, it can be provided the body of a tubular motor on which the sleeve 30 is adapted.

It should also be noted that the sleeve 30 and the shaft winding 3 as shown have a cylindrical shape. However, they can have any other form known in the field of shutters rolling.

The flange 8 has, moreover, a recess 9 forming a circular shaped notch of dimensions adapted to extend over a portion of the surface of said flange substantially equal to one third of the total surface of this last. In addition, this recess 9 is arranged so as to be oriented in direction of the slides 7 in the unrolled position of the deck 1.

Furthermore, this flange 8 includes a light called guide 21 extending completely into the recess 9 and having the shape of a circular sector centered on the axis of rotation (x), defining an angle at the top in the range of 90 to 180 degrees. In addition, this guide light 21 is extended, at one of its ends, as shown in Figures 5 to 11, by a circular orifice 22 of diameter greater than the width of said lumen.

The anti-lift device also comprises, associated with each flange 8, a link 10 connecting said flange with the upper blade 2a of the deck 1, articulated on the one hand on the flange 8 around a pivot 11 extending in the guide light 21, and on the other hand, on said upper blade around a pivot 12 articulated on the latter.

As shown in Figures 3 and 4, each link 10 has the general shape of a truncated bean at its end opposite the pivot 12, so as to present a rear front face 10a substantially flat. Each link 10 further comprises a notch 13 formed in the convex contour portion of said link.

The pivot 11 of each link 10 has a diameter adapted to, as mentioned above, extend through the guide light 21. This pivot 11 is, moreover, provided with a circular head 14 of diameter suitable for be able to be inserted into the orifice 22, in order to subsequently maintain said pivot inside the guide light 21. For this purpose, once the pivot 11 placed in the guide light 21, a shutter is positioned in the orifice 22 in order to avoid any subsequent withdrawal of said pivot.

The pivot 12 of each link 10 has meanwhile the shape of a cylindrical sleeve open longitudinally, suitable for snap onto a cylindrical intermediate sleeve 15 which is itself open longitudinally, and whose internal shape defines a range suitable for snap onto the upper profile 2b of the upper blade 2a of the deck 1.

In addition, this pivot 12 includes a skirt 32 of front support on the upper blade 2a of the deck 1, during locking, adapted to stiffen and prevent the flexing of said blade during this locking, and thus avoid fatigue ruptures.

• encliquetage du fourreau intermédiaire 15 sur le profilé supérieur 2b de la lame supérieure 2a sur un tronçon de cette dernière éloigné de son extrémité,
• encliquetage du manchon cylindrique 12 sur l'extrémité du profilé supérieur 2b de la lame supérieure 2a,
• verrouillage de la liaison manchon 12/profilé supérieur 2b par coulissement du fourreau intermédiaire 15 à l'intérieur dudit manchon.

As shown in FIG. 3, the link 10 / upper blade 2a assembly is carried out according to the following steps:

• snap-fastening of the intermediate sheath 15 on the upper section 2b of the upper strip 2a on a section of the latter away from its end,
• snap-fitting of the cylindrical sleeve 12 onto the end of the upper profile 2b of the upper blade 2a,
• locking of the sleeve 12 / upper section 2b link by sliding the intermediate sleeve 15 inside said sleeve.

Each link 10 comprises, finally, a gusset 23 of stiffening of the connection between said link and pivot 12.

As shown in the figures, the dimensions of the rod 10 relative to those of the recess 9, are adapted to allow said rod to retract entirely into said recess, and to fill a maximum percentage of the surface of the latter.

The anti-lift device finally comprises a stop blocking 16 consisting of a pin secured to each flange 8 by insertion of said pin in a bore such as 17 formed in said flange, so as to abut in the notch 13 of the link 10 in the lower unwound position of the deck 1.

In addition, each flange 8 has a plurality of bores 17 distributed along a circular curve centered on the axis of rotation (x) of so as to refine the locking position of the link 10. It should be noted that this adjustment can also be obtained by moving the stop 16 in a light with locking notches.

Finally, the respective peripheral edges 8a, 9a, 10b of the flanges 8, of the recesses 9 and of the links 10 have a profile oblique, so as to facilitate the smooth sliding of the blades 2 during deck operations 1.

The operation of the above anti-lift device described is as follows: during the course of the deck 1, the link 10 is adapted to pivot to a deployed position in which the pivot 12 is radially further from the axis of the winding shaft 3 than the pivot 11, obtained at the end of unfolding of the deck 1 as shown in Figures 1 and 5, by blocking said link by the pin 16, or from the rear front face 10a of the link 10 against the winding shaft, according to the height adjustments of the deck 1.

In this position, moreover, the pivot 11 is arranged in abutment against one of the ends of the guide light 21.

Thereafter, as shown in Figures 5 to 11, when the apron 1 is wound up by means of drive in rotation of the winding shaft 3, the rod 10 is initially made to pivot around the pivot 11 so as to retract into the recess 9 of the flange 8, position retracted in which it is held when the winding is for follow-up.

In addition, at the start of winding, the pivot 11 slides in the guide light 21 so that, at no time, the weight of the deck 1 is supported by the rods 10. It should be noted, moreover, as shown in FIGS. 6 to 11, that the length of the guide light 21 is adapted so that, when the flexible bands are fully tensioned, the pivot 11 is at a distance from the end of said guide light opposite the orifice 22. This provision makes it possible, in fact, to guarantee that at no time the deck 1 is not is supported by the links 10.

Claims (15)

1. Safety device against the lifting of roller shutters, comprising:

   a curtain (1) comprising a plurality of laths (2) with an upper lath (2a), articulated one to another,

   a winding shaft (3) with an axe of rotation (x), connected to the upper lath (2a) of the curtain (1) through fastening means (20) in order to allow the winding and the unwinding of said curtain around said shaft,

   means for rotatively driving the winding shaft (3), able to allow the unwinding of the curtain (1) in a lower unwound position in which it closes an opening, and the winding of the curtain (1) in an upper wound position in which the latter is wound over its greatest length around said winding shaft and in which the opening is cleared,

   and means (7) for guiding and maintaining the curtain (1),

      said safety device against the lifting being characterized in that it comprises:

   at least one flange (8) destined to be integral with the winding shaft (3), and to be positioned in order to extend along the edge of one of the lateral sides of the curtain (1),

   a link (10), associated with each flange (8), destined to be laterally positioned along the edge of the curtain (1), and to be articulated around two axles (11, 12) integral respectively with the upper lath (2a) of said curtain and with said flange, with the axles being arranged so that the link (10) pivots between a radially out-spread position in the lower unwound position of said curtain, in which the radial distance between the axle (12) integral with the upper lath (2a) and the winding shaft (3) is superior to the distance between the axle (11) integral with the flange (8) and said winding shaft, and a radially retracted position against the winding shaft (3) in the wound position of said curtain,

   stop means (10a, 13, 16) for automatically blocking each link (10) relatively to the corresponding flange (8) in the radially out-spread position of said link.
2. Safety device against the lifting according to claim 1, characterized in that:

   each flange (8) is provided with a port (21), said guiding port, having the form of a circular sector placed around the axe of rotation (x), and in that

   each link (10) is articulated to a flange (8) around an axle (11), said mobile axle, seated in the guiding port (21) of said flange, with said mobile axle and said guiding port being arranged so that the mobile axle (11) abuts on one of the ends of the guiding port (21) in the radially out-spread position of the link (10), and moves in the direction of the other end of said guiding port at the beginning of the winding of the curtain (1).
3. Safety device against the lifting according to claim 2, characterized in that:

   the mobile axle (11) comprises a head (14) for laterally guiding and maintaining said axle in the guiding port (21), and in that

   the guiding port (21) is extended at one of its ends by an orifice (22) the section of which corresponds to the section of the head (14) of the mobile axle (11), for the introduction of said head, with the orifice being adapted to be closed by a closer, once the mobile axle (11) has been introduced in said guiding port.
4. Safety device against the lifting according to one of claims 2 or 3, characterized in that the guiding port (21) forms a circular sector the apex of which is between 90° and 180°.
5. Safety device against the lifting according to one of claims 1 to 4, characterized in that the stop means comprise, for each link (10), a front face (10a), said rear frontal face, of said link on the opposite side of the axle (12) integral with the upper lath (2a), the form of which is adapted to contact and to be blocked against the winding shaft (3), in the radially out-spread position of said link.
6. Safety device against the lifting according to one of claims 1 to 5, characterized in that the stop means comprise a blocking stop (16), mounted to each flange (8), integral with said flange, and positioned so that it forms a toggle joint with the joint axles (11, 12) of the link (10) and it locks said toggle joint in the out-spread position of said link.
7. Safety device against the lifting according to claim 6, characterized in that it comprises adjustment means (17) for adjusting the position of the blocking stop (16), able to allow to adjust the blocking position of said link.
8. Safety device against the lifting according to claim 7, characterized in that:

   the link (10) comprises a portion of convex contour relatively to the mobile axle, provided with a notch (13) able to accommodate the blocking stop (16), and in that

   the adjustment means (17) for adjusting the position of said stop are adapted to allow to adjust its position along a circular trajectory placed around the axe of rotation (x) and secant relatively to the notch (13) in the out-spread position of the link.
9. Safety device against the lifting according to one of claims 1 to 8, characterized in that each flange (8) is destined to be disposed so that it substantially contacts the lateral side in front of the curtain (1), with the flange being provided with a recess forming a cut (9) the form of which is adapted to accommodate the link (10) when the latter pivots between its out-spread position and its retracted position.
10. Safety device against the lifting according to claim 9, characterized in that the depth of the recess (9) of each flange (8) corresponds to the thickness of the link (10).
11. Safety device against the lifting according to one of claims 9 or 10, characterized in that the recess (9) of each flange (8) and each link (10) comprise edges (9a, 10b) with an oblique profile.
12. Safety device against the lifting according to any one of preceding claims, wherein each lath (2) of the curtain (1) comprises upper (2b) and lower shapes articulated to the juxtaposed laths, characterized in that the articulation axle of each link (10) to the upper lath (2a) of said curtain comprises a sleeve (12) perpendicular to said link the form of which is adapted to snap onto the upper shape (2b) of said upper lath with a freedom of rotation relatively to said upper shape.
13. Safety device against the lifting according to claim 12, characterized in that it comprises a cylindrical intermediary sheath (15) the form of which is adapted to snap onto the upper shape (2b) of the upper lath (2a), with the sleeve (12) integral with the link (10) having a cylindrical form corresponding to the form of said sheath.
14. Safety device against the lifting according to any one of preceding claims, characterized in that each flange (8) comprises an axial sleeve (30) the form of which is adapted for the accommodation into the end section of the winding shaft (3), and means for fixing said winding shaft to said sleeve.
15. Safety device against the lifting according to claim 14, characterized in that each sleeve (30) forms a bearing able to accommodate a connection axle (31) for connecting the winding shaft (3) to the roller shutter case.

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