EP2158375B1 - Anti-lifting device for roller shutters - Google Patents

Description

The invention relates to an automatic safety latch, for roller shutter comprising an articulated blade apron adapted to be wound around a winding tube of regular polygonal cross section, in particular octagonal, actuated by an operating system. The lock comprises at least one tube link fixed to the winding tube and an apron link to which is articulated the upper blade of the apron, the links tube and apron being connected by a hinge system capable of causing an arching of the links when the apron is fully deployed, the winding tube being stopped in rotation by the operating system.

An automatic security lock of this type is known, for example according to EP-0 937 859 B1 on behalf of the plaintiff company. Such an automatic lock ensures both the blocking of the deck when it is in the low position, and prevents an ascent of the deck by an external action, such as an attempted break-in. On the other hand, the raising of the apron is of course possible with the help of the maneuvering system.

The diameter of the winding tubes varies, in particular as a function of the length of the deck deployed, which generally requires to provide accessory mounting and assembly parts adapted to each tube diameter.

FR 2 778 692 A discloses a safety lock of the type defined above, wherein the tube link has an inner dihedral surface having two planar faces which form an angle equal to that formed between two successive sides of a straight section of the tube, and at least one ring clamping open, clean to surround the tube, having at each of its ends a hooking means. The lock is relatively thick, in particular because of radially inward extensions for the attachment of the clamping ring, which prevents the tube link from being applied against the tube. The winding capacity in the trunk is thus limited.

The invention aims, above all, to reduce the number of accessory parts necessary for the establishment of an automatic safety lock by making such a multi-purpose lock to different diameters of tubes. The invention also aims to provide a safety lock whose manufacture remains simple, setting up is fast with the possibility of adjustment. The size of the lock must be reduced, so as not to diminish substantially the winding capacity in the trunk.

• le maillon tube présente une surface intérieure en dièdre ayant deux faces planes qui forment un angle égal à celui formé entre deux côtés successifs d'une section droite du tube,
• et au moins une bague de serrage ouverte, propre à entourer le tube, comportant à chacune de ses extrémités un moyen d'accrochage,
  est caractérisé en ce que :
• le maillon tube s'appuie sur deux faces consécutives du tube, quel que soit son diamètre,
• la bague de serrage est réglable,
• et le maillon tube comporte, de chaque côté, une extension en saillie latérale suivant la direction de l'arête du dièdre comportant un moyen d'accrochage complémentaire de celui prévu à l'extrémité de la bague de serrage ouverte qui ne prend pas de place en épaisseur afin de garder une bonne capacité d'enroulement dans le coffre.

According to the invention, an automatic safety latch for a shutter comprising an articulated blade apron capable of being wound around a winding tube of regular polygonal cross-section, in particular octagonal, actuated by a maneuvering system, the latch comprising at least one tube link attached to the winding tube and an apron link to which is articulated the upper deck blade, the tube and apron links being connected by a hinge system capable of causing an arching of the links when the apron is completely deployed, the winding tube being stopped in rotation by the operating system, wherein:

• the tube link has an inner dihedral surface having two flat faces which form an angle equal to that formed between two successive sides of a cross section of the tube,
• and at least one open clamping ring adapted to surround the tube, comprising at each of its ends a hooking means,
  is characterized in that
• the tube link rests on two consecutive faces of the tube, whatever its diameter,
• the clamping ring is adjustable,
• and the tube link comprises, on each side, an extension projecting laterally in the direction of the edge of the dihedral having a hooking means complementary to that provided at the end of the open clamping ring which does not take up space in thickness to keep a good winding capacity in the trunk.

Preferably, at least one of the faces of the dihedral of the tube link comprises at least one lug adapted to be housed in a perforation of the winding tube.

Advantageously, a clamping ring is provided on each side of the link.

Each lateral extension of the tube link may comprise a housing opening in the peripheral direction of the tube, and one end of the clamping ring has on at least one of its faces a notched shape provided to cooperate with a complementary notched shape provided on the least one of the inner walls of the housing to allow an adjustable hooking of the end of the clamping ring.

Advantageously, the ring has at one end a hook adapted to hook to a bar of the tube link and, at its other end, a tongue provided with a notched form of the type "fir tail" to fit into a complementary shape of the housing of the tube link.

Preferably, the housing is open on one side in a direction parallel to the edge of the dihedron so that the end of the ring can be disengaged by a displacement parallel to the edge of the dihedron.

At least one link may comprise at least one spring tongue acting on the next link to push it into a stable position at the time of unwinding, at the end of descent.

An angular wedge, comprising a bar extending over the entire length of the links, can be interposed between the bearing faces of the links to limit the opening between two links. The angular wedge may comprise, at each end of the bar, an orthogonal ear to the direction of the bar to frame lugs of the links and to be traversed by an axis of articulation of the links.

The invention also relates to a shutter equipped with an automatic safety lock as defined above for connecting the upper blade of the deck to the winding tube.

• Fig. 1 est une coupe schématique verticale partielle d'un volet roulant équipé d'un verrou de sécurité automatique selon l'invention.
• Fig. 2 est une coupe schématique verticale partielle à plus grande échelle d'un maillon tube selon l'invention et de la zone du tube contre laquelle le maillon est plaqué.
• Fig. 3 est une vue en perspective du verrou de sécurité et de deux sections de tubes de diamètres différents.
• Fig. 4 est une vue en élévation d'une bague de serrage.
• Fig. 5 est une vue en perspective de dessus d'une partie de tube octogonal équipé d'un verrou de sécurité selon l'invention.
• Fig. 6 est une vue en perspective de dessus, sous un autre angle et à plus petite échelle que sur Fig. 5, du tube octogonal équipé à une extrémité d'un verrou selon l'invention.
• Fig. 7 montre, en perspective, le tube octogonal et le verrou en position d'arc-boutement, et
• Fig. 8 est une vue en perspective d'une cale angulaire montée sur une articulation entre le maillon tube et un maillon intermédiaire.

The invention consists, apart from the arrangements set out above, in a number of other arrangements which will be more explicitly discussed below with respect to an embodiment described with reference to the accompanying drawings, but which is in no way limiting. On these drawings:

• Fig. 1 is a partial vertical schematic section of a roller shutter equipped with an automatic safety lock according to the invention.
• Fig. 2 is a partial vertical schematic section on a larger scale of a tube link according to the invention and the region of the tube against which the link is plated.
• Fig. 3 is a perspective view of the safety lock and two sections of tubes of different diameters.
• Fig. 4 is an elevational view of a clamping ring.
• Fig. 5 is a perspective view from above of an octagonal tube portion equipped with a security lock according to the invention.
• Fig. 6 is a perspective view from above, from another angle and on a smaller scale than on Fig. 5 of octagonal tube equipped at one end of a lock according to the invention.
• Fig. 7 shows, in perspective, the octagonal tube and the bolt in the bracing position, and
• Fig. 8 is a perspective view of an angular wedge mounted on an articulation between the tube link and an intermediate link.

Referring to the drawings, in particular Fig. 1 , one can see an automatic safety latch A for roller shutter comprising an apron T with articulated blades 1. The apron T is adapted to be wound around a winding tube 2 of regular polygonal cross section, in particular octagonal, actuated by a maneuvering system (not shown). The operating system, motorized or manual, allows to block the rotation tube 2 when the operating system is stopped.

The lock A comprises at least one link 3 attached to the winding tube 2 and an apron link 4 to which is articulated the upper blade 1 of the deck. The links tube and apron are connected by a hinge system B which comprises, according to the example of Fig. 1 an intermediate link 5. The articulation system B is capable of causing the links 3, 4, 5 to be braced when the apron T is completely deployed and the winding tube 2 is stopped in rotation by the control system. maneuver. This bracing makes it possible, in particular, to prevent unauthorized raising of the apron from the outside, for example in view of a break-in.

The apron T is guided in vertical slides 6 provided at their upper end with a tulip 7 opening towards the tube 2. This tube is rotatably supported at each end by a cheek 8 which can close a chest having a front wall vertical 9 substantially to the right of the slide 6.

The automatic lock A according to the invention is intended to be adaptable, without modification or with very few modifications, to the various octagonal tubes on the market, the diameter of which can generally vary from 10 mm to 10 mm over a range from 40 mm to 70 mm. mm. The diameter of an octagonal tube is that of the circle circumscribing the octagonal section, or more generally polygonal regular.

The tube link 3 has an inner dihedral surface 10 ( Fig. 2 ) having two flat faces 10a, 10b which form an angle α equal to that formed between two successive sides 11a, 11b of a cross-section of the tube 2. In the case of an octagonal tube, the angle α is equal to 135 ° whatever the diameter of the tube. The edge of the dihedron 10 is superimposed on an edge of the tube 2. The tube link 3 is supported on two consecutive faces 11a, 11b of the tube. The attachment and articulation of the next link, namely the intermediate link 5 in the example, are always in a good position, pressed closer to the tube 2 so as not to penalize the winding.

At least one of the faces of the dihedron, for example the face 10a in the example of Fig. 2 , comprises at least one lug 12 protruding which is housed in a perforation of the tube 2 to immobilize the link 3 in translation on the tube 2. Indeed, on each tube market, there is always at least one face a repetition of perforations constituting lights.

The width of the faces of the dihedron 10, that is to say the dimension of the faces in a direction orthogonal to the edge of the dihedron, is smaller than the width of the faces of the winding tube 2 of smaller diameter.

Fixing the link 3 to the tube 2 is provided by at least one clamping means S ( Fig.4-6 ) Adjustable clean to surround the tube. Preferably, a clamping means S is provided on each side of the tube link 3. The clamping means S is advantageously constituted by an open ring 13 ( Fig. 4 ) made of plastic material. The ends of the ring 13 can be spaced by elastic deformation so that the ring 13 is positioned on the tube 2 without having to thread it from one end of the tube. The ring 13 comprises, radially inwards, lugs 13a for bearing against the faces of the tube 2. A hook 14 is provided at one end of the ring 13.

The tube link 3 comprises on each side a lateral projecting portion comprising a substantially rectangular closed-contoured light 15, limited on the side of the intermediate link 5 by a bar 16 parallel to the direction of the edge of the dihedron. The light 15 is provided to receive the hook 14 which is hooked on the bar 16.

The other end of the ring 13 comprises a tongue 17 provided, at least on its face turned radially inwardly, a succession of notches 18 of the type "tail of fir" suitable to come and engage in complementary notches 18a provided in a housing 19 ( Fig. 5 ) delimited by walls protruding from each side of the tube link 3, in opposition to the light 15. The housing 19 is open laterally, that is to say in a direction parallel to the edge of the dihedron, the lower face housing being provided with complementary notches 18a. The upper face of the housing 19 is smooth and is applied against the smooth upper face of the tongue 17. Preferably, the upper wall 19a of the housing 19 exerts a pressure on the tongue 17 to properly apply the notches 18 of the tongue in those 18a housing. The lateral opening of the housing 19 makes it possible to engage and disengage the tongue 17 by a translation parallel to the direction of the ridges of the tube. Alternatively, one could provide notches on both sides of the tongue 17 and on both faces opposite the housing 19. The rings 13 are thus adjustable, that is to say that their diameter, and their circumference can be modified according to the tube considered.

The rings 13 are adapted to each range of tube diameters, but the tube link 3 remains the same.

The intermediate link 5 preferably has a lower face, facing the winding tube, in the form of dihedron 20 having the same angle as the dihedral 10 of the link 3. The articulation between the links 3 and 5 is made at help of ears such as 21 ( Fig.3 ) provided on the longitudinal edges of each link, adapted to come facing one another, so that a hinge pin 22 can be engaged in the circular holes of these ears to ensure the articulated connection between the links 3 and 5. The pivoting of the intermediate link 5 in a direction away from the tube 2 is limited by the abutment of the longitudinal edge 5a ( Fig. 5 ) of the link 5 against the corresponding longitudinal edge 3a of the link 3, or against the longitudinal edge of an angular wedge 23 interposed between the opposite edges of the links 3 and 5.

The angular wedge 23 ( Fig. 5 ) comprises a longitudinal bar 23a, preferably trapezoidal section with large base facing outwards, arranged between the facing edges 3a, 5a of the links. The bar 23a extends along the entire length of the links parallel to the edge of the dihedron 10. At both ends of the wedge 23 are provided, in a plane orthogonal to the longitudinal direction of the bar, ears 24 with clean circular holes to frame the ears 21 ( Fig.3 ). The orifices of the lugs 21 and 24 face each other and may be traversed by the hinge pin 22. The presence of the wedge 23 limits the pivoting of the link 5 in the direction that moves it away from the tube 2.

The articulation between the intermediate link 5 and the deck link 4 is made in the same way as between the links 3 and 5 using conjugate ears provided at each end of the links, these ears having openings adapted to be traversed by a hinge pin. An angular wedge similar to the wedge 23 can be placed between the links 5 and 4 to limit the angular deflection.

To ensure that the links unfold well until abutting by their longitudinal edges facing such as 3a and 5a, at least one spring tongue 25 ( Fig.6 ) is provided on one side of a link such as the intermediate link 5. This tongue 25 secured to one end of the link 5, is engaged at its other end, being constrained, under a lateral projection 26 of the next link, to know the deck link 4 in the example. According to the representation of Fig. 6 , the tongue 25 has a tendency to lift the deck link 4 to bring it to bear by its longitudinal edge against the adjacent edge of the intermediate link 5. The deck link 4 comprises at its end remote from the intermediate link 5, a hook 27 for hingably attaching the complementary edge of the upper blade 1 of the deck. The tongue 25 is in the stressed position when the links are wound on the tube 2 and thus pushes the links such as 4 in their stable position at the time of unwinding at the end of descent.

The establishment of a lock A to one end of the tube 2 is carried out as follows.

The link tube 3 is applied against two successive faces of the tube 2 by engaging the one or the lugs 12 in perforations of the tube 2. A ring 13 is installed around the tube 2 at each end of the link 3, the lugs 13a of the ring taking bearing against the faces of the tube 2. The hook 14 of the ring is engaged in the slot 15 to hook the bar 16. The tongue 17, at the other end of the ring 13, is engaged in the housing 19 so that the notches of this tongue cling to the notches provided in the housing, exerting a tightening of the ring 13 around the tube. By operating in the same way at each end of the link 3, the link is thus fixed on the tube.

A self-adjusting, self-locking system is created around the tube 2. This system eliminates the need for a precise tolerance on the diameter of the tube and allows an assembly without specific tools, resulting in quick assembly.

For disassembly it is sufficient using, for example, a screwdriver to drive laterally the tongue 17, as illustrated by the arrow F on Fig. 6 to escape from the notched portion of the housing 19 of the link.

Preferably, the intermediate links 5 have a custom length to the section of the tube 2, so that the articulation between the intermediate link 5 and the deck link 4 is in the middle of a face of the tube. Therefore, in wound position, the projecting angle of two contiguous faces of the tube is positioned between the joints present at each end of the intermediate link, precisely hollowed out at this point, thus optimizing the winding capacity. blades in the trunk. The aim is that the links of the lock do not exceed the outer diameter of the ring 13.

The lock A according to the invention is positioned in the roller shutter box between the upper blade 1 of the deck and the winding tube 2. When the deck is lowered and comes against a lower limit stop, the blades come to bear vertical against each other, and the lock A creates a rigid link by buttressing links 3, 4, 5 between them. During the course of 2, the links unfold with respect to one another to an abutment position defined by the coming into contact of the edges 3a, 5a with each other or with the angular wedge 23. In this position, preferably the articulation axes such as the hinge axis 22a ( Fig.1 ) between the intermediate link 5 and the deck link 4, are below an alignment line D shown in broken line on Fig. 1 . The line D is tangent to the tube 2 and passes through the joint G between the deck link 4 and the upper blade 1 of the deck. In the case of a vertical thrust force tending to lift the deck completely lowered, during an attempted break-in, the links 4, 5, 3 remain in abutment against each other by bracing themselves and preventing the ascent of the apron. The force oriented along the straight line D has a horizontal component which tends to press the upper blade 1 against the vertical wall of the slide 6 or the tulip 7 orthogonal to the plane of Fig. 1 , or possibly against the front wall 9 of the trunk if the blade 1 substantially exceeds the top of the tulip 7.

For a good adaptation to the different sizes of boxes, several lengths of lock A can be defined. The lock A to function properly must block the deck T just above the tulip 7. Thus, when the deck T is completely lowered, it is desirable that the hinge G between the deck link and the upper blade 1 of the deck is Just at the top exit of the tulip. In this configuration, the action line D1 is inclined at an angle of 45 ° to the horizontal. However, such a configuration is not systematically obtained because, depending on the number of blades 1 necessary for the apron T to close the opening (door or window), the articulation G can be located at a level h0 ( Fig. 1 ) in the vicinity of the upper outlet of the tulip 7, ie at a higher level h1 such that the vertical distance between h1 and h0 corresponds substantially to a fraction of the width of an apron blade, or to this width generally of approximately 40 mm.

To always have a satisfactory position of bracing links, depending on the size of the box and the diameter of the tube, is varied the number of intermediate links 5 of the lock A. In addition, it limits the amplitude of pivoting of the intermediate link or links 5 with respect to the tube link 3 by interposing the angular wedge 23 ( Fig. 8 ), the thickness of which can be chosen, between the edges bearing on the various links. As a result, the or each intermediate link 5 runs less from the tube. The line of action D, tangent to the tube 2 and passing through the hinge G, forms with the ideal line D1 a lower angle than in the absence of the shim 23. It is thus possible to more finely adjust the length of the latch A depending on the situation encountered.

The angular wedge 23 can be put in place directly by the fitter or installer of the trunk to limit the number of references of parts to be controlled, or to better adjust on site the length of the lock.

Another possibility to reduce the opening angle between the tube link and the intermediate link would be to create an angular variant of the tube link or the intermediate link in order to have the right model directly to the trunk mounting station.

Claims (10)

1. Automatic security lock, for roller shutter comprising a screen with articulated slats designed to be would aground a winding tube (2) of regular polygonal cross section, in particular octagonal, actuated by a manoeuvring system, the lock comprising at least one tube link (3) fixed to the winding tube and one screen link (4) to which the top slat (1) of the screen is articulated, the tube and screen links being linked by an articulation system (B) designed to provoke a bracing of the links when the screen is fully deployed, the winding tube being stopped in rotation by the manoeuvring system, wherein:

   - the tube link (3) has a dihedral inner surface (10) having two planar faces which form an angle (a) equal to that formed between two successive sides (11a, 11b) of a cross section of the tube,

   - and at least one open clamping ring (13), designed to surround the tube, comprising, at each of its ends, a hooking means,
   characterized in that:

   - the tube link (3) bears on two consecutive faces (11a, 11b) of the tube, whatever its diameter,

   - the clamping ring (13) is adjustable,

   - and the tube link (3) comprises, on each side, an extension protruding laterally in the direction of the edge of the dihedron comprising a hooking means (16, 18a) complementing that provided at the end of the open clamping ring (13) which does not take up space thickness-wise in order to keep a good winding capacity in the case.
2. Lock according to Claim 1, characterized in that at least one of the faces of the dihedron (10) of the tube link (3) comprises at least one pin (12) designed to be housed in a perforation of the winding tube (2).
3. Lock according to Claim 1 or 2, characterized in that a clamping ring (13) is provided on each side of the tube link.
4. Lock according to any one of the preceding claims, characterized in that each lateral extension of the tube link comprises a housing (19) opening in the peripheral direction of the tube, and one end of the clamping ring comprises, on at least one of its faces, a toothed shape (18) designed to co-operate with a complementary toothed shape (18a) provided on at least one of the inner walls of the housing (19) to allow for an adjustable hooking of the end of the clamping ring,
5. Lock according to Claim 4, characterized in that the ring (13) comprises, at one end, a hook (14) designed to hook onto a strip (16) of the tube link (3) and, at its other end, a tab (17) provided with a toothed shape (18) of "wedge" type be fitted intro a complementary shape (18a) of the housing (19) of the tube link.
6. Lock according to Claim 5, characterized in that the housing (19) is open on one side in a direction parallel to the edge of the dihedron (10) such that the end (17) of the ring (13) can be released by a displacement parallel to the edge of the dihedron.
7. Lock according to any one of the preceding claims, characterized in that at least one link (5) comprises at least one spring tab (25) acting on the next link (4) to push it intro a stable position at the time of unwinding, at the end of descent.
8. Lock according to any one of the preceding claims, characterized in that an angular chock (23), comprising a bar (23a) extending over the entire length of the links (3, 4, 5), is interposed between the bearing faces of the links to limit the opening between two links.
9. Lock according to Claim 8, characterized in that the angular chock (23) comprises, at each end of the bar (23a), a lug (24) orthogonal to the direction of the bar to frame the lugs (21) of the links and be passed through by an articulation axis (22) of the links.
10. Roller shutter, characterized in that it is equipped with a lock according to any ore of the preceding claims linking the top slat (1) of the screen to the winding tube (2).

Images