EP2028338A1 - Connection device for a roller shutter apron used to lock the apron in the deployed position - Google Patents

Abstract

The device (1) has blocking units formed by a groove (27), projections parts (29, 29'), internal side (31) and external sides (33, 33'), fixed between a connection ring (7) and a rotating shaft (5). A coupling link (9) has an end (11) mounted in a pivot connection with the ring and another end (13) integrated to an upper end of an apron. A locking unit formed by a stop unit locks the apron in a deployed position to stop the roll up of apron, and is arranged between the ring and link at the level of pivot connection assembly between the elements to block the pivotment of link on the ring.

Description

The present invention relates to a coupling device for roller shutter, intended to ensure the connection between the deck and the winding shaft of the shutter. It will find its application in the technical field of shutters, both manufacturers and installers.

The shutters are arranged at the level of the openings of buildings, of the door or window type, to ensure their shutter preventing inter alia the intrusion into the building in the absence of the owner of the premises.

The shutter generally consists of a trunk, arranged in the upper part of the opening, it can be integrated into the lintel of the opening, especially during a new construction, or attached to the door jamb. opening, in case of renovation. This box receives a winding shaft, also called tube or drum, on which rolls and unwinds an apron composed of articulated slats, this apron allowing the closing of the opening when fully deployed, and on the contrary the release of the opening when fully wound on the shaft. The apron is generally guided in translation by slides arranged on the side walls of the opening. The upper end of the apron is secured to the winding shaft to maintain between the two elements when said apron is completely unrolled from the shaft.

Different modes of assembly between the deck and the winding shaft are known today.

A first mode of design, similar to that described in the patent application published under the number FR-2696779 , consists of the use of rings reported on the winding shaft and immobilized relative thereto, the rotation of the shaft causing that of the rings. These rings receive in pivot connection a hooking link articulated with the upper end of the deck. This deck is thus secured to the winding shaft through the rings and the attachment link. So kind of coupling device, the rings are threaded from the ends of the shaft, which have for example a grooved form, cooperating with teeth arranged on the inner diameter of the ring, to ensure the immobilization in rotation of the ring relative to the tree. The rings are then immobilized in translation on the axis by means of a locking system, for example of the screw type. Furthermore, the articulation of the attachment link on the shaft requires the use of two rings relative to which one end of said link is mounted in pivot connection. In case of defect of this articulation, in particular at the level of the rings reported on the shaft, such a design of the device requires the disassembly of the winding shaft disposed in the trunk, in order to extract the rings and proceed to their replacement.

Another way of designing the assembly between the deck and the winding shaft, similar to that described in the European patent EP-0.937.859 B1 , consists in the use of a hooking link having a curved shape adapted to that of the winding shaft. The attachment link is assembled directly on the shaft, for example by means of hooking tabs, a stapling system or directly by screwing on the shaft.

Such designs have the disadvantages of having a limited resistance to tearing, which can lead to the stall of the apron relative to the drum; the apron can then be easily removed from the opening by removing it from the side slides, for example to penetrate inside the house.

Moreover, as described in these two documents FR-2696779 and EP-0937859 , the shutter assembly devices, allowing the connection between the deck and the winding shaft, comprise locking means whose function is to prevent the rise of the deck when it is deployed and closes the opening of window or door. These assembly devices comprise for this at least two attachment links arranged between the deck and the winding shaft, these links being articulated to one another, the first link being connected to the shaft of winding and the second link being connected to the deck, the links assembled for example by means of a system of hinges indémontable, the articulation between the two links being arranged to generate a bracing when the deck is fully deployed and we tried to lift it.

The present invention aims to design a new design mode of the apron locking means, this locking preventing the ascent of the deck when it is deployed and closes the opening of the door or window. The design of the locking means is simplified and easy to implement when installing the coupling device. In addition, the design of the locking means reduces the number of parts required for the constitution of the coupling device.

The invention also makes it possible to overcome the drawbacks of existing systems and to design a coupling device between the deck and the rolling shutter winding shaft which has a reduced number of easily adaptable elements between the winding shaft. and the apron while ensuring a perfect anchoring of the attachment link with the winding shaft. It also allows the locking of the apron preventing its rise when it is deployed and closes the opening of door or window.

For this purpose, the present invention relates to a coupling device for a roller shutter, allowing the connection between the deck and the winding shaft of said shutter. The device comprises a connecting ring adapted to be arranged around the winding shaft. Locking means in rotation and in translation are arranged between the ring and the shaft. The locking in rotation and in translation is performed along the longitudinal axis of the winding shaft. The device comprises a hooking link between the deck and the winding shaft. This attachment link has a first end which is mounted in pivot connection with the ring integral with the shaft, and a second end which is integral with the upper end of the deck. The device also comprises means for locking the deck in the deployed position to prevent the raising of said deck. These locking means are arranged between the ring and the link at the pivotally connected connection formed between said elements, the locking blocking the pivoting of the link on the ring.

Thus, only one attachment link is sufficient to design the deck locking means, said locking means being implemented between the ring and the link; while the devices of the prior art, such as those known from the documents FR-2696779 and EP-0937859 require the use of two attachment links between which is realized the locking system.

According to the invention, the apron wraps around the ring mounted on the shaft. This ring has an outer spiral shape on which wraps the apron. The direction of the spiral on the ring when it is mounted on the winding shaft depends on the winding direction of the apron around the ring. This spiral shape on the ring generates a shoulder portion which is constituted by the difference in diameter between the beginning and the end of the spiral. The assembly in pivot connection of the link on the ring is arranged at the shouldered portion in the progressive direction of the spiral, so as to allow a winding of the link and the apron in the progressive direction of the spiral.

Preferably, the attachment link comprises at its first end a notch. This notch includes a width corresponding to that of the ring. The pivot connection of the link on the ring is arranged so that the notch receives the shoulder portion of the ring.

Stop means are arranged between the link and the shoulder portion of the ring. These abutment means are preferably constituted by a cleat arranged on the bottom of the notch. This cleat extends on the outer side of the link and is adapted to bear on the shoulder portion when the link pivots outwardly relative to the ring, in the upward direction of the apron, which limits the pivoting to the outside of said link relative to the ring and thus prevent the rise of the deck.

According to another aspect of the present invention, the ring is flexible and includes a slot so as to have two adjacent edges defined on each side of said slot. The ring is adapted to be deformed to be spaced apart at its two edges, said gap allowing to pass and position the ring around the shaft, said positioning allowing the setting up the locking means in rotation and in translation of the ring on the shaft.

Such a design has the advantage of allowing the positioning of the ring on the shaft after it has been positioned and assembled inside the rolling shutter box.

Another advantage is to be able to disassemble said ring in case of malfunction, especially due to wear. This disassembly of the ring is thus achieved without requiring disassembly of the winding shaft.

The rotational locking means of the ring relative to the shaft consist of a type of assembly mortise / tenon. These means consist of at least one longitudinal groove arranged on the winding shaft, this groove forming the mortise. By scoffers, a projecting portion is arranged on the inner diameter of the ring. This projecting portion is arranged at the end of at least one of the edges of the ring and forms the post, adapted to be inserted into the mortise. The positioning of the ring around the shaft makes it possible to introduce the protruding part into the groove, ensuring the implementation of the locking means.

According to a design mode, the two edges of the ring each have a projecting portion having an inner side and an outer side, the inner sides of the projections being adjacent when the two edges are joined. The two inner sides have an obliqueness adapted to allow the clamping of the outer sides on the lateral sides of the groove when the two projections are introduced into said groove and the two edges are joined. This ensures an anchorage between the ring and the winding shaft.

Preferably, the groove has a dovetail shape. Similarly, at least one of the outer sides of the two projecting parts has a draft capable of allowing a dovetail assembly with the groove when the two edges are joined.

In a preferred embodiment, the two adjacent edges each have a shouldered shape. The shouldered forms of both edges are able to come into abutment on the other when the ring is arranged around the shaft and that said edges are joined.

The pivot link assembly of the link on the ring is arranged at the two adjacent edges so that said edges are held together and nested in the notch, which prevents their spacing.

Preferably, the forms shouldered on the two adjacent edges are adapted to receive in pivot connection the first end of the link, the notch being positioned at the two abutting shouldered forms, and able to maintain them in abutment position.

According to a preferred embodiment, one of the edges comprises a transverse orifice opening, and the other edge comprises a circular transverse stud adapted to be introduced into the orifice on the other edge during the abutment of the two shouldered forms. This arrangement has the advantage of ensuring a self-positioning between the two adjacent edges, so as to ensure the proper positioning of the ring around the shaft.

Furthermore, this arrangement also allows to receive the link mounted in pivot connection at the adjacent edges. For this, the lateral sides of the notch each comprise a transverse opening opening. Similarly, the stud comprises an opening opening. The orifices of the lateral sides and of the stud are able to cooperate when the link is positioned on the adjacent edges of the ring. These orifices allow the passage and positioning of a connecting pin inside, this axis for maintaining and pivoting the link relative to the ring.

The direction of the spiral on the ring depends on the winding direction of the apron around the ring. This spiral design has the advantage of ensuring proper winding of the apron around the shaft. The spiral starts at one of the adjacent edges of the ring and ends at the other edge. The connection in pivot connection of the link on the ring is arranged at the adjacent edges, said assembly being able to allow a winding of the link and the integral apron of said link in the progressive direction of the spiral.

The invention also relates to a roller shutter comprising such a coupling device. The roller shutter includes an apron for closing a building opening, a winding shaft of the deck to allow its deployment or removal, and means for controlling the rotation of the winding shaft.

1. a) de solidarisation de la seconde extrémité du maillon d'accrochage avec l'extrémité supérieure du tablier ;
2. b) de positionnement de la bague autour de l'arbre d'enroulement, en écartant les deux bords adjacents de la bague au niveau de sa fente, permettant ainsi le passage de la bague puis son positionnement autour de l'arbre ;
3. c) de blocage en rotation de la bague sur l'arbre d'enroulement ;
4. d) d'assemblage en liaison pivot de la première extrémité du maillon avec la bague.

Regarding the installation of the shutter, a first step is therefore to put the box and the winding shaft and then position the deck so as to fold it in the trunk. The assembly of the deck on the winding shaft consists of the following steps:

1. a) securing the second end of the attachment link with the upper end of the deck;
2. b) positioning the ring around the winding shaft, by spacing the two adjacent edges of the ring at its slot, allowing the passage of the ring and its positioning around the shaft;
3. c) rotational locking of the ring on the winding shaft;
4. d) assembly in pivot connection of the first end of the link with the ring.

For this, the ring is positioned around the winding shaft taking into account the winding direction of the deck, the progressive direction of the spiral being disposed on the side of the deck during assembly of the ring.

The rotational locking of the ring on the winding shaft is achieved by positioning the projecting portion on the inner diameter of the ring, forming the tenon, inside the groove on the winding shaft, forming the mortise.

The shouldered forms of the two adjacent edges of the ring disposed around the shaft are then positioned in abutment, the pivotally connected connection of the first end of the link then ensuring the abutment of the two edges and the locking of the ring on the tree.

• la figure 1 représente un dispositif d'attelage monté sur un arbre d'enroulement de volet roulant ;
• les figures 2 et 3 représentent le dispositif d'attelage monté sur un arbre d'enroulement et permettant le verrouillage du tablier du volet roulant ;
• les figures 4 et 5 représentent la bague constituant le dispositif d'attelage ;
• la figure 6 représente un maillon d'accrochage agencé entre le tablier et la bague ;
• les figures 7 à 9 représentent différentes étapes de montage de la bague sur l'arbre d'enroulement.

The present invention will be better understood on reading the following description based on figures, among which:

• the figure 1 represents a coupling device mounted on a rolling shutter winding shaft;
• the figures 2 and 3 represent the coupling device mounted on a winding shaft and allowing the locking of the rolling shutter apron;
• the Figures 4 and 5 represent the ring constituting the coupling device;
• the figure 6 represents an attachment linkage arranged between the apron and the ring;
• the Figures 7 to 9 represent different steps of mounting the ring on the winding shaft.

As illustrated on Figures 1 to 3 , the coupling device 1 for roller shutter according to the invention allows the connection between the deck 3 and the winding shaft 5 of the roller shutter. This coupling device 1 consists of a connecting ring 7, illustrated in particular in FIGS. Figures 4 and 5 . This connecting ring 7 is adapted to be arranged around the winding shaft 5 and to be anchored thereto by means of locking means in rotation and in translation arranged between said ring 7 and the winding shaft. 5. The coupling device 1 also comprises at least one attachment link 9 illustrated in particular in FIG. figure 6 . This hooking link allows the assembly between the ring 7 and the apron 3, as illustrated in FIG. figure 3 . For this, the attachment link 9 has a first end 11 which is mounted in pivot connection with the ring 7, integral and fixed on the shaft 5. The link 9 then comprises a second end 13 which is integral with the upper end 15 of the apron 3, that is to say on the last blade 17 of the apron 3, as illustrated in FIG. figure 3 .

The ring 7 comprises a flexibility, that is to say it has good aptitude to be deformed. The ring 7 comprises a slot 19, illustrated on the figure 4 , this slot 19 extending over the entire thickness of the ring 7 so as to open it completely in two, the latter then having two adjacent edges 21, 23 which, under normal conditions, are joined together as illustrated on the figure 5 . This ability to deform the ring 7 makes it possible to spread its adjacent edges 21, 23, as illustrated in FIG. figure 4 . The flexibility of the ring 7 must allow a spacing sufficient to allow its introduction on the winding shaft 5. For this, in order to promote the deformation of said ring 7, it has recess zones 25, illustrated in FIG. figure 3 , for example three recess areas 25, which provide better deformation of said ring 7 to promote the spacing between the two edges 21,23. This spacing between the two edges 21,23 therefore allows the ring 7 to be positioned around the shaft 5, as illustrated in FIG. figure 1 and also on Figures 7 to 9 .

This positioning is also intended to allow the establishment of locking means in rotation and in translation of the ring 7 relative to the shaft 5. For this, the locking means are constituted by a connection type tenon / mortise . This tenon / mortise connection is implemented by a groove 27 extending preferably longitudinally along the entire length of the shaft 5. This groove 27 is the mortise part of the connection. The tenon portion of the connection is constituted by a projecting portion 29,29 'arranged on the inner diameter of the ring. To promote the positioning of the portion 29,29 'protruding in the groove 27, it is disposed at the end of at least one of the edges 21,23 of the ring 7.

Preferably, this projecting portion 29,29 'is divided in two, so that the two adjacent edges 21,23 of the ring 7 each comprise a projecting portion, said projecting portions 29,29' being arranged to cooperate with one another. with the other. For this, the two parts 29,29 'protruding comprise an inner side 31,31' and an outer side 33,33 '. These protruding portions 29, 29 'are arranged on the edges 21, 23 so that when said edges are united as shown in FIG. figure 5 the inner sides 31, 31 'of the projecting portions 29, 29' are adjacent.

Preferably, these inner sides 31,31 'have an oblique made in the transverse direction, that is to say in the direction of the width of the ring, as illustrated on the figures 4,5 and 8 . This obliqueness is intended to promote the spacing between the two outer sides 33,33 'of the projections 29,29' when the two edges 21,23 are joined. This spacing between the two outer sides 33,33 'thus promotes their clamping on the lateral sides 35,37 of the groove 27 formed on the shaft 5, which guarantees the locking 7 of the ring 5 on the shaft 5 both in rotation about its axis, and in translation along the longitudinal direction of the groove 27.

To avoid any clearance of the projecting parts 29,29 ', positioned in the groove 27, said groove has a dovetail shape, as illustrated in FIGS. Figures 1 to 3 . Similarly, at least one of the outer sides 33 of the two projections 29,29 'has at least one undercut, forming the tenon, which allows a dovetail assembly with the groove 27, forming the mortise, when the two edges 21,23 are joined, and that the two outer sides 33, 33 'are flattened on the lateral sides 35,37 of the groove 27.

Thus, the positioning of the ring 7 on the shaft 5 is carried out according to the steps illustrated in FIGS. Figures 7 to 9 . After making the spacing between the two edges 21,23, as described above, is positioned, firstly the outer side 23 having the undercut in the groove 27 shaped dovetail , then positioning the second portion 29 'projecting arranged on the second edge inside the groove, as shown in FIG. figure 8 . The two adjacent edges 21, 23 are then joined so as to close the ring 7 as illustrated in FIG. figure 5 and on the figure 9 . When the two edges 21,23 are joined together, the outer sides 33,33 'are then plated on the lateral sides 35,37 of the groove 27, the dovetail assembly then being formed between the ring 7 and the shaft 5, the two elements then being completely immobilized relative to each other.

Preferably and without limitation, the two adjacent edges 21, 23 have a shouldered shape, as illustrated in FIG. figure 4 and on the figure 8 ; this shape shouldered on the two adjacent edges is intended to allow proper positioning between said edges when joined and thus ensure proper fitting of the ring.

These two shoulder forms 39,39 'are complementary and constitute abutments with respect to each other, so that when the ring 7 is positioned around the shaft 5 and then closed, the two shouldered forms 39,39 'abut one on the other.

As illustrated in figure 8 , one of the edges 21 comprises at its shouldered form 39 ', an orifice 41 extending transversely along the width of the ring, the orifice 41 being open. The other edge 23 comprises at its shouldered form, a stud 43. This stud 43 comprises a circular shape of diameter adapted to that of the orifice 41 on the first edge 21, this stud extends on the side of the face internal of the shouldered form. Thus, when the two stepped forms 39,39 'are joined and abutted, the stud 43 enters the orifice 41, which guarantees self-positioning between the two elements when the ring 7 is properly positioned around the tree 5.

As illustrated in figure 6 , the attachment link 9 comprises at its first end 11 a notch 45 of width corresponding to that of the ring 7 when closed, that is to say that the two adjacent edges 21,23 are joined. This notch 45 makes it possible to constitute a fork inside which the two edges 21,23 joined are nested when the link 9 is mounted in pivot connection on the ring 7. This interlocking of the two adjacent edges 21,23 inside notch 45 prevents their spacing and avoids the opening of the ring may cause the release of the projecting parts.

The pivot connection of the link 9 on the ring 7 is carried out at the two adjacent edges 21, 23, in particular at the shouldered forms 39, 39 'which are held in abutment by the two lateral sides 47, 49 of the notch 45 when the link 9 is positioned on the ring 7. As illustrated in FIG. figure 6 , the lateral sides 47,49 of the notch 45 each comprise a hole 51,51 'extending transversely. When the two adjacent edges 21,23 are nested within the notch 45, its orifices 51,51 'cooperate with an orifice 53 opening arranged transversely on the stud 43 along its length, said stud 43 being arranged at the Inside the orifice 41. This constitutes an assembly of the pivot link type. In order to keep this pivot connection immobilized, the device comprises an axis 55, illustrated on the figure 1 which is positioned through the two orifices 51, 51 'on the lateral sides 47, 49 of the notch 45 and through the orifice 53 on the stud 43 itself disposed through the orifice 41 on the second stepped form 39 '. This axis 55 is held in position, for example by knurling or screwing. This connection thus makes it possible to constitute the pivoting of the link 9 with respect to the ring 7.

The coupling device 1 according to the present invention comprises means for locking the apron 3 when the latter is in the deployed position, as illustrated on FIG. figure 3 . These locking means are arranged between the ring 7 and the link 9 so as to block the rotation between the two elements mounted by means of the pivot connection, as described above, and having the advantage of using only one only ring to mount the link 9 hooking on the shaft 5. The winding of the deck 3 is made directly on the ring 7. Preferably, several coupling devices 1 will be used and positioned on the shaft 5 , and at least two devices, for carrying out the winding of the apron 3, in order to avoid the deformation thereof during its winding.

In order to promote the winding of the apron 3 on the ring 7, integral and fixed on the shaft 5, said ring has an outer spiral shape, or snail. The direction of the external spiral shape on the ring is arranged on the shaft according to the winding direction of the apron 3 around the ring 7, that is to say according to the direction of rotation of the ring. winding shaft 5 corresponding to the ascent of the apron 3. As illustrated on the figures 2 and 3 the spiral shape starts at one of the adjacent edges 23 of the ring and terminates at the other edge 21. The pivot link assembly of the link 9 on the ring 7 is arranged at the edges adjacent 21,23 corresponding to the beginning and the end of the spiral. The position of the pivot connection is such that it promotes the winding of the link and the integral apron of said link in the progressive direction of the spiral.

The locking means are constituted by stop means arranged between the link 9 and the edges 21,23 of the ring 7 to block the pivoting of the link on the ring and lock the deck 3 when it is fully unrolled from the shaft , thus preventing its rise. These abutment means consist on the one hand by a catch 57, illustrated on the figure 6 , arranged on the bottom of the notch 45, this cleat 57 extending from the outside of the link. The abutment means are also arranged on the ring 7 which comprises a shoulder portion 58 constituted by an inclined plane 59, illustrated on the figure 5 . This shouldered portion 58 is constituted by the offset generated by the spiral shape of the ring 7 which has a difference in diameter between the beginning and the end of the spiral.

In the remainder of the description, the terms shoulder portion (58) and inclined plane (59) will commonly be used, the latter corresponding in particular to the preferred form implemented on the ring 7 as illustrated in the appended figures.

This offset is implemented at the shouldered forms 39,39 'of two adjacent edges 21,23. For this, one of the adjacent edges 23, that disposed on the start side of the spiral, has a recess 61 salient corresponding to the diameter of the end of the spiral, the inner side of the recess 61 forming part of the inclined plane 59 Conversely, the adjacent edge 21 disposed on the end end of the spiral side, comprises a recess 63 forming a recess so as to obtain a diameter reduction corresponding to the diameter of the beginning of the spiral, said recess 63 forming the second part of the inclined plane 59. Thus, when the two shouldered forms 39,39 'are joined, the two recesses 61,63 correspond and cooperate, the two parts of the inclined plane being joined to form a single inclined plane 59. When the link 9 is mounted in pivot connection on the ring 7 at these adjacent edges, the cleat 57 corresponds with the inclined plane 59. The movements of the link 9, articulated on the ring 7, its t then limited angularly, as illustrated on the figure 2 . In a first position, the link 9 is pressed against the outer diameter 65 of the spiral corresponding to its position during the winding of the apron 3 around the shaft 5. According to the second position, where the stop 57 is in support on the inclined plane 59, as illustrated in figures 2 and 3 the apron 3 is completely unrolled from the shaft 5, the raising of the deck 3 being impossible due to the angular locking of the link 9 with respect to the ring 7.

Preferably, the offset formed by the difference in diameter on the outer side 65 of the ring 7 due to its spiral shape has a height "h" corresponding to the thickness "e" of the fastening link 9. Thus, when the link 9 is pressed on the outer diameter 65 spiral, corresponding to its position during winding of the deck, the blades 17 wind around the shaft 5 while maintaining a circular shape.

As illustrated in figure 3 the second end 13 of the link 9 comprises a pivot connection type connection with the upper end 15 of the apron 3. For this, the blades 17 comprise a hook shape 37 at one of their ends, this hook shape 37 being able to be introduced in a corresponding hook shape 69 on the second end 13 of the link 9 so as to ensure pivoting between the two elements. This pivoting is limited by the end 71,73 of the link 9 and blades 17 arranged to abut on an inclined plane 75 arranged on the upper side of the apron blades. Such an assembly method is known from the prior art and appears for example in the document FR-2696779 .

The coupling device 1 thus equips the shutters to make the connection of the deck 3 on the winding shaft 5. The installation of the roller shutter therefore consists in a first time to pose the constituent elements, that is, that is to say the fixing elements of the winding shaft which is rotatably mounted inside a trunk disposed in the upper part of the opening of the building, of the door or window type. The assembly of these elements at the opening is achieved by means of guide accessories of the flange type, blade guide, and other elements known to those skilled in the art and varying according to whether it is a mounting on a new construction or rehabilitation.

This winding shaft receives the apron for closing the opening of the building. The driving of the winding shaft is carried out by control means which can be manual or electric, of the motor type. The apron is positioned at the opening, closing it. This positioning of the deck is obtained by means of slides for guiding said deck and ensuring the maintenance of the ends of the blades component. When all the elements are positioned at the opening, then the assembly step of the deck on the winding shaft by means of coupling devices, according to the invention, before the closure of the trunk. For that, the second end of the link 9 is secured to the end 15 of the deck 3 as described above. The ring 7 is then positioned around the winding shaft 5.

These different steps correspond in particular to a method of laying directly on site during installation. However, we can consider a pre-assembly of the ring 7 around the winding shaft 5 at the factory.

This positioning is achieved by spacing the two adjacent edges 21,23 of the ring 7 at its slot 19, taking into account the winding direction of the deck 3. Indeed, it is necessary to position the progressive direction of the spiral formed on the outer diameter 65 of the ring 7 on the side of the deck 3. When the ring 7 is positioned around the winding shaft 5, the locking is made in rotation and in translation thereof with respect to the shaft as illustrated on Figures 7 to 9 . The protruding portions 29,29 'are thus positioned on the adjacent edges 21,23 of the ring 7 forming the tenon, inside the groove on the winding shaft which forms the mortise. The approximation of the two adjacent edges 21,23 of the ring 7 and their abutment thus allows a clamping of the projecting portion on the lateral sides of the groove, as described above. The locking in position of the ring 7 on the shaft 5 is ensured by the assembly in pivot connection of the link 9 with the ring 7, the notch 45 on the link 9 allowing the stop abutment of the two adjacent edges 21,23 of the ring and thus the tightening of the projecting parts 29,29 'inside the groove 27.

In a preferential and nonlimiting manner, the roller shutter is equipped with at least two coupling devices evenly distributed with respect to the rolling shutter apron in order to distribute the forces and the rings 7 adequately on the drum or winding shaft 5.

Preferably, the elements of the coupling device are made of composite material.

Other modes of design of the coupling device can be envisaged by the skilled person without departing from the scope of the present invention.

Claims (16)

Coupling device (1) for roller shutter, allowing the connection between the deck (3) and the winding shaft (5) of said flap, the device comprising: - a connecting ring (7) adapted to be arranged around the winding shaft (5), locking means (29,29 ', 27,31,31', 33,33 ') in rotation and in translation being arranged between the ring (7) and the shaft (5); - A hooking link (9), a first end (11) is mounted in pivot connection with the ring (7) and a second end (13) is integral with the upper end (15) of the deck (3); and means for locking the apron (3) in the deployed position to prevent it from being raised, characterized in that the locking means are arranged between the ring (7) and the link (9) at the pivotally connected connection between said elements, the locking blocking the pivoting of the link (9) on the ring (7). ). Coupling device (1) according to claim 1, characterized in that the apron (3) is wound around the ring (7) mounted on the shaft (5), said ring (7) comprising an external form in spiral on which wraps said apron (3), the direction of the spiral depending on the winding direction of the apron (3) around the ring (7). Coupling device (1) according to claim 2, characterized in that the spiral shape generates a shoulder portion (58) constituted by the difference in diameter between the beginning and the end of said spiral, the pivot connection assembly of the link (9) on the ring (7) being arranged at said shoulder portion (58) so as to allow winding of the link (9) and the apron (3) in the progressive direction of the spiral. Coupling device (1) according to claim 3, characterized in that the fastening link (9) comprises at its first end (11) a notch (45) of width corresponding to that of the ring (7), the mounting in pivot connection of the link (9) on the ring (7) being arranged so that the notch (45) receives the shoulder portion (58) on the ring (7). Coupling device (1) according to claim 4, characterized in that abutment means are arranged between the link (9) and the shoulder portion (58) of the ring (7). Coupling device (1) according to claim 5, characterized in that the abutment means are constituted by a catch (57) arranged on the bottom of the notch (45), said catch (57) extending on the side external link and being adapted to bear on the shoulder portion (58) when the link (9) pivots outwardly relative to the ring, so as to limit said pivoting outwardly. Coupling device (1) according to one of claims 1 to 6, characterized in that the ring (7) is flexible and comprises a slot (19) so as to have two adjacent edges (21, 23), said ring (7) being able to be deformed to separate the two edges (21,23) and position it around the shaft (5), said positioning allowing the setting up of the locking means (27,29 ', 31,31). ', 33,33') in rotation and in translation. Coupling device (1) according to claim 7, characterized in that the rotation locking means are of the tenon / mortise type and consist of at least one longitudinal groove (27) on the shaft (5) of winding, forming a mortise, and a projection (29,29 ') arranged on the inner diameter of the ring (7) and at the end of at least one of the edges (21,23) of said ring (7), forming tenon, the positioning of the ring (7) around the shaft (5) for introducing the projecting portion (29,29 ') into the groove (27). Coupling device (1) according to Claim 8, characterized in that the two edges (21, 23) of the ring (7) have a protruding part (29, 29 ') having an internal side (31, 31). ') and an outer side (33,33'), the inner sides (31,31 ') of the projecting portions (29,29') being adjacent when the two edges (21,23) are joined, said inner sides (31,23 ') being , 31 ') each having an oblicity capable of allowing the clamping of the sides external (33,33 ') on the lateral sides (35,37) of the groove (27) when the two edges (21,23) are joined together. Coupling device (1) according to claim 9, characterized in that the groove (27) has a dovetail shape and at least one of the outer sides (33) of the two projections (29, 29 ' ) has a draft capable of allowing a dovetail assembly with the groove (27) when the two edges (21,23) are joined together. Coupling device (1) according to one of Claims 7 to 10, characterized in that the two adjacent edges (21, 23) each have a shoulder shape (39, 39 '), said shouldered shapes being able to come into contact with each other. abutment on the other when the ring (7) is arranged around the shaft (5) and the two edges (21,23) are joined. Coupling device (1) according to claim 11, characterized in that one of the edges (21) comprises a through opening (41) transverse and the other edge (23) comprises a circular stud (43) transverse suitable for to be introduced into the orifice (41) on the other edge during the abutment of the two shouldered forms (39,39 '). Coupling device (1) according to one of Claims 3 to 6 combined with one of Claims 11 or 12, characterized in that the stepped shapes (39, 39 ') of the two edges (21, 23) are suitable to receive in pivot connection the first end (11) of the link (9), the notch (45) being able to hold in abeyance said shouldered forms (39,39 '). Coupling device (1) according to claims 12 and 13, characterized in that the lateral sides (47,49) of the notch (45) each comprise a transverse orifice (51,51 ') opening, and the stud ( 43) comprises an opening (53) opening, said orifices (51, 51 ', 53) being able to cooperate during the positioning of the link (9) on the adjacent edges (21, 23) so as to allow the positioning of a connecting pin (55) inside said orifices (51, 51 ', 53), allowing pivoting of the link (9) with respect to the ring (7). Coupling device (1) according to one of Claims 1 to 14, characterized in that the second end (13) of the link (9) comprises pivot-type connection with the upper end (15) of the apron (3). ). Roller shutter comprising in particular an apron (3) for closing off a building opening, a winding shaft (5) of the deck (3), said shaft (5) being mounted in rotation inside a trunk disposed in the upper part of the opening, and means for controlling the rotation of the winding shaft, characterized in that it is equipped with at least two coupling devices (1) according to one of the Claims 1 to 15 for connecting the apron (3) to the winding shaft (15).

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