EP2112321A1 - Roller blind equipped with a brake, brake and braking slat for such a blind - Google Patents

Abstract

The roller blind has a mechanical brake (B) comprising a wedging unit (K) connected in vertical translation with an apron. The unit has jaws (13a, 13b) including notched or toothed sectors situated in sides opposite to transversally extended cams (16a, 16b) with respect to an articulation axle (14), respectively. The brake has a control unit (D) comprising a part (18) situated in a vertical plane against a section of the apron. The part has a lateral extension (20a) and another lateral extension supported on the respective cams of the jaws that are tilted by being projected towards exterior.

Description

The invention relates to a shutter comprising an apron guided on each side by a slide, and which is adapted to wrap around a tube, the deck being composed of blades articulated between them, the upper blade being connected to the tube, in particular by a safety lock or simple flexible fasteners, the roller shutter being equipped with a brake.

The invention relates more particularly, but not exclusively, to a motorized roller shutter. The descent and the climb are obtained using an electric motor that drives the tube.

During the descent of a roller shutter, in particular a shutter which is driven not by a manual control but by an electric motor, there is a risk of jamming people or goods between the lower final blade of the apron and the threshold of the door or window.

• par une commande à contact non maintenu, c'est-à-dire que l'opérateur donne le signal de descente et ensuite peut quitter du regard le tablier en cours de fermeture sachant que le moteur s'arrêtera tout seul lorsqu'un contact de fin de course bas est atteint,
• ou par une commande à distance (une télécommande, une horloge, un automate de pilotage réagissant au vent, à la luminosité, à la pluie, à une tentative d'intrusion ou tout autre paramètre).
  De telles commandes motorisées risquent de créer des situations dangereuses de coincement.
  Le volet roulant, par sa conception, peut créer un effet guillotine. L'effort de coincement est proportionnel au poids du tablier, mais aussi à la puissance du moteur en fin de descente. En effet, la plupart des moteurs sont réglés pour s'arrêter au point bas dans une position angulaire du tube prédéfini (il reste encore des moteurs à réglage manuel des fins de course où on ajuste le point d'arrêt bas dans une position précise). Dans ces conditions, si le volet est équipé de verrous automatiques (c'est-à-dire de liens rigides en poussée entre le tablier et le tube d'enroulement), en présence d'un obstacle lors de la descente du tablier, le couple moteur agissant sur le tube va s'appliquer en pression sur le tablier par l'intermédiaire des verrous automatiques, et la lame inférieure peut exercer un effort très important sur l'obstacle.
  On peut craindre le pire s'il s'agit d'une personne, notamment un enfant, coincé sous la lame finale inférieure.
  DE 27 05 119 montre un volet roulant du genre de ceux qui comportent un tablier guidé de chaque côté par une coulisse, et propre à s'enrouler autour d'un tube, le tablier étant composé de lames articulées entre elles, la lame supérieure étant reliée au tube, le volet roulant étant équipé d'un frein,
• le tablier comportant au moins deux parties actives voisines, montées de manière à pouvoir se rapprocher l'une de l'autre lorsque le tablier, dans sa descente, rencontre un obstacle ou une butée,
• le frein étant un frein mécanique qui comporte un moyen de commande sensible au rapprochement des deux parties actives, et au moins un organe de coincement lié en translation verticale au tablier,
• l'organe de coincement comprenant au moins une mâchoire montée rotative sur un support lié à l'une des parties actives du tablier, le basculement de la mâchoire étant provoqué par le déplacement du moyen de commande qui coopère avec une came, prévue sur la mâchoire, en réponse au déplacement des deux parties actives du tablier,
• chaque mâchoire comportant un secteur cranté ou denté propre à venir se bloquer contre une paroi de la coulisse.

There are motorized controls that are driven:

• by an unmaintained contact command, that is to say that the operator gives the descent signal and then can leave the apron in the process of closing, knowing that the engine will stop by itself when a contact of bottom limit is reached,
• or by a remote control (a remote control, a clock, a controller that reacts to wind, brightness, rain, an intrusion attempt or any other parameter).
  Such motorized controls can create dangerous jamming situations.
  The shutter, by its design, can create a guillotine effect. The jamming effort is proportional to the weight of the deck, but also to the engine power at the end of descent. Indeed, most of the motors are set to stop at the low point in an angular position of the predefined tube (there are still manually adjustable motors of the limit switches where we adjust the low point in a precise position) . Under these conditions, if the shutter is equipped with automatic latches (that is to say rigid links pushing between the deck and the winding tube), in the presence of an obstacle during the descent of the deck, the engine torque acting on the tube will be applied in pressure on the deck by means of the automatic locks, and the lower blade can exert a very important effort on the obstacle.
  One can fear the worst if it is a person, especially a child, stuck under the lower final blade.
  DE 27 05 119 shows a shutter of the kind of those which comprise a deck guided on each side by a slide, and adapted to wind around a tube, the deck being composed of blades articulated between them, the upper blade being connected to the tube, the roller shutter being equipped with a brake,
• the apron comprising at least two adjacent active parts, mounted so as to be close to one another when the deck, in its descent, meets an obstacle or a stop,
• the brake being a mechanical brake which comprises a control means responsive to the bringing together of the two active parts, and at least one wedging member connected in vertical translation to the apron,
• the wedging member comprising at least one jaw rotatably mounted on a support connected to one of the active parts of the apron, the tilting of the jaw being caused by the displacement of the control means which cooperates with a cam, provided on the jaw in response to the displacement of the two active parts of the apron,
• each jaw having a serrated sector or toothed clean to come hang against a wall of the slide.

The control of the notched sector support against the wall of the slide needs to be improved in order to ensure a more effective blocking.

EP 0 908 593 also relates to a mechanism for stopping a motorized roller shutter when an obstacle is encountered on descent. A mechanical solution is provided which requires a particular slide with teeth. The apron stop is not immediate and can intervene only after a race equal to the pitch of the toothing.

The object of the invention is, above all, to provide a brake system integrated into the apron, in particular to the final blade, which ensures an effective locking. It is desirable that this brake system is independent of the type of maneuver and is sufficient to itself to stop the descent of the deck. It is further desirable that this brake system is simple and economical to achieve.

• le secteur cranté ou denté de la mâchoire est situé, par rapport à l'axe d'articulation, du côté opposé à une came qui s'étend transversalement,
• le moyen de commande du frein comprend une pièce située dans un plan vertical contre la tranche du tablier et comportant deux extensions latérales qui viennent appuyer sur les cames respectives des mâchoires qui basculent en faisant saillie vers l'extérieur.

According to the invention, a roller shutter of the kind defined above, is characterized in that:

• the serrated or toothed sector of the jaw is located, relative to the axis of articulation, on the opposite side to a cam which extends transversely,
• the brake control means comprises a part situated in a vertical plane against the edge of the deck and having two lateral extensions which press on the respective cams of the jaws which swing outwardly.

This brake system is independent of the type of maneuver and is sufficient to itself to stop the descent of the deck. Of course, this brake system can be completed by a system for sending information to an electric motor driving the winding tube, to stop the motor or reverse its direction of rotation.

An advantage of the brake system according to the invention, compared to a safety edge which would control the stopping of the engine, is that it blocks the descent of the deck directly at the obstacle. With a safety edge, one depends on the reaction time of the electronics and the drive train between the motor and the final blade (play in the motor reducer, play in the motor supports, in the fastening systems of the apron , etc ...).

The system of the invention also has the advantage of mitigating any linkage incident of the kinematic chain. Indeed, if the connection between two blades of the deck breaks, or if a fastener system breaks, the apron locking system remains effective.

Preferably, the wedging member is mounted so as to project in a plane perpendicular to the plane of the deployed deck.

The part of the brake control means may comprise tabs projecting inwards so as to be below the cams, to close the jaws and thus move the notched sectors away from the walls of the slide, when the two active parts of the blade spread vertically from one another ..

The two active parts may be provided at a brake blade of the deck, which consists of the two active parts nested one inside the other, and can move relative to each other in the plane apron deployed.

Generally, the brake blade is the lower blade of the deck. A mechanical brake can be provided on each side of the apron to cooperate with the corresponding slide.

Advantageously, the jaw is rotatably mounted about a horizontal axis parallel to the plane of the deployed deck. The wedging member may comprise two jaws rotatably mounted in opposite directions.

Preferably, the support on which the jaw is rotatably mounted comprises a body inserted into the end of the lower active portion of the brake blade, this body having an axis on which the jaw is hinged.

The support on which the jaw is rotatably mounted may be formed by a vertical web integral with the lower active part, which sail is provided on its upper edge with a horizontal hollow cylinder adapted to receive an axis of rotation of the jaw, the part active lower being provided to fit into the upper active part.

• une lame de freinage comprenant deux parties actives voisines montées de manière à pouvoir se rapprocher l'une de l'autre lorsque le tablier, dans sa descente, rencontre un obstacle ou une butée,
• un moyen de commande sensible au rapprochement des deux parties actives de la lame de freinage,
• et au moins un organe de coincement prévu pour être lié en translation verticale au tablier,
• l'organe de coincement comprenant au moins une mâchoire montée rotative sur un support lié à l'une des parties actives du tablier, le basculement de la mâchoire étant provoqué par le déplacement du moyen de commande qui coopère avec une came, prévue sur la mâchoire, en réponse au déplacement des deux parties actives du tablier,
• chaque mâchoire comportant un secteur cranté ou denté propre à venir se bloquer contre une paroi de la coulisse,
  caractérisé en ce que :

• le secteur cranté ou denté de la mâchoire est situé, par rapport à l'axe d'articulation, du côté opposé à une came qui s'étend transversalement,
• le moyen de commande du frein comprend une pièce située dans un plan vertical contre la tranche du tablier et comportant deux extensions latérales, qui viennent appuyer sur les cames respectives des mâchoires qui basculent en faisant saillie vers l'extérieur.

The invention also relates to a mechanical brake for shutters as defined above, comprising:

• a brake blade comprising two adjacent active parts mounted so as to be close to each other when the deck, in its descent, meets an obstacle or a stop,
• control means responsive to the bringing together of the two active parts of the brake blade,
• and at least one wedging member provided to be connected in vertical translation to the apron,
• the wedging member comprising at least one jaw rotatably mounted on a support connected to one of the active parts of the apron, the tilting of the jaw being caused by the displacement of the control means which cooperates with a cam, provided on the jaw in response to the displacement of the two active parts of the apron,
• each jaw having a serrated sector or toothed clean to come hang against a wall of the slide,
  characterized in that

• the serrated or toothed sector of the jaw is located, relative to the axis of articulation, on the opposite side to a cam which extends transversely,
• the brake control means comprises a piece located in a vertical plane against the edge of the deck and having two lateral extensions, which are pressed on the respective cams of the jaws which swing outwardly projecting.

The invention also relates to a brake blade for a shutter or a mechanical brake as defined above, comprising two adjacent active parts, mounted so as to be close to one another when the deck, in its descent, encountering an obstacle or an abutment, characterized in that the lower active part comprises a vertical web integral with this lower active part, which sail is provided on its upper edge with a horizontal hollow cylinder adapted to receive an axis of rotation of the jaw the lower active portion being provided for insertion into the upper active part.

• Fig. 1 est une vue schématique en perspective, depuis l'avant droite, d'un volet roulant en position de fermeture, avec partie basse arrachée de la coulisse droite.
• Fig. 2 est une vue en perspective du frein mécanique selon l'invention et des extrémités des deux parties actives d'une lame de freinage partiellement représentée.
• Fig. 3 est une vue en perspective éclatée du frein de Fig. 2.
• Fig. 4 est une vue en perspective, à plus grande échelle, du côté intérieur du frein avec les mâchoires en position déployée, sans la lame de tablier.
• Fig. 5 montre, semblablement à Fig. 4, les mâchoires en position rentrée, le corps du frein n'étant pas représenté.
• Fig. 6 est une coupe schématique de la lame de freinage et du frein vus du côté intérieur, alors que les deux parties actives de la lame sont écartées au maximum, avec les mâchoires en position rentrée.
• Fig. 7 est une vue en élévation de l'extérieur du frein avec partie inférieure retirée, les mâchoires étant en cours de déploiement.
• Fig. 8 montre, semblablement à Fig. 6, le frein avec partie inférieure retirée, les mâchoires étant déployées au maximum.
• Fig.9 montre en perspective de l'extérieur une variante avantageuse de réalisation de la lame de freinage et du frein, dans la position où les parties actives sont écartées et le frein desserré.
• Fig.10 montre la lame de freinage dans la position de Fig.9, sans les mâchoires ni le moyen de commande du frein.
• Fig.11 montre de l'extérieur en perspective la lame de freinage et le frein dans la position où les parties actives sont rapprochées et le frein serré, et
• Fig.12 montre la lame de freinage dans la position de Fig.11, sans les mâchoires ni le moyen de commande du frein, les parties actives étant rapprochées.

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 in detail with reference to the accompanying drawings, but which is not limiting. On these drawings:

• Fig. 1 is a schematic perspective view, from the front right, of a shutter in the closed position, with the lower part of the right slide pulled off.
• Fig. 2 is a perspective view of the mechanical brake according to the invention and ends of the two active parts of a partially represented braking blade.
• Fig. 3 is an exploded perspective view of the brake of Fig. 2 .
• Fig. 4 is a perspective view, on a larger scale, of the inner side of the brake with the jaws in the deployed position, without the apron blade.
• Fig. 5 shows, similarly to Fig. 4 , the jaws in the retracted position, the brake body not being shown.
• Fig. 6 is a schematic section of the brake blade and the brake seen from the inside, while the two active parts of the blade are spaced apart as far as possible, with the jaws in the retracted position.
• Fig. 7 is an elevational view of the outside of the brake with the lower part removed, the jaws being deployed.
• Fig. 8 shows, similarly to Fig. 6 , the brake with the lower part removed, the jaws being deployed to the maximum.
• Fig.9 shows in perspective from the outside an advantageous embodiment of the brake blade and the brake, in the position where the active parts are spaced apart and the brake released.
• Fig.10 shows the brake blade in the position of Fig.9 , without the jaws or the brake control means.
• Fig.11 shows from the outside in perspective the brake blade and the brake in the position where the active parts are brought together and the brake applied, and
• Fig.12 shows the brake blade in the position of Fig.11 , without the jaws or the brake control means, the active parts being brought together.

Referring to Fig.1 drawings, we can see a roller shutter V comprising an apron 1 guided on each side by a slide 2a, 2b horizontal cross section U. The concavities of the slides are facing one another. The apron 1 is suitable for wrapping around a tube 4 of horizontal axis located above the upper end of the slides and driven by an M motor with gearbox, schematically shown. The upper blade 3a of the apron is connected to the tube 4, in particular by simple flexible fasteners, or by safety latches 5 which allow a controlled winding from the motor M and the tube 4, but which oppose, by means of stubborn, unauthorized lifting of the lowered apron

The apron 1 has, as illustrated on Fig. 2 and 3 at least two adjacent active parts, namely a lower active part 6 and an upper active part 7 mounted so as to be able to approach each other in the vertical direction when the deck 1, in its descent, encounters a obstacle or stop. The active parts 6, 7 are provided at a braking blade 8 of the apron. This braking blade 8 is composed of two active parts 6, 7 nested one inside the other and can move relative to each other in the vertical plane of the deck deployed. Preferably, the brake blade 8 constitutes the lower or final blade of the deck. However this braking blade could be provided at another level.

The active parts 6, 7 of the brake blade 8 are metal, advantageously made of aluminum, or light alloy, spun.

The active part 6 is formed by a hollow section section as shown in FIG. Fig. 6 , extending over the entire width of the deck. The profile is open at each end. The cross section of the active part 6 is rectangular with its large vertical side. The small upper side of the active part 6 is secured in the middle of a T-shaped section 9, the vertical upright passes through a slot 10 provided in the lower part of the active part 7. This active part 7 is also formed by a profile to substantially rectangular cross section with a horizontal partition 7a substantially halfway up. The horizontal branch 11 of the T-shaped section 9 is housed in the partitioned lower cavity of the active part 7 and can move from a lower position illustrated on Fig. 6 where the active parts 6, 7 are spaced apart as far as possible, at a position illustrated on Fig. 8 where the active parts 6, 7 are brought closer together; the branch 11 is then close to the partition 7a. A curved hook-shaped profile 12 is provided at the top of the active portion 7 for articulation with the immediately higher apron blade.

The rolling shutter comprises at least one mechanical brake B. Preferably two mechanical brakes B are provided, respectively one on each side of the deck 1, at each end of the brake blade 8.

The mechanical brake B comprises a control means D that is sensitive to bringing the two active parts 6, 7, and at least one wedging K clean to protrude transversely for a block against a wall of the slide 2a.

The wedging member K preferably comprises two jaws 13a, 13b rotatably mounted in opposite directions about a horizontal axis of articulation 14 parallel to the plane of the deployed deck. The jaws 13a, 13b are made of metal, preferably treated steel.

The hinge axis 14 is provided on the outer vertical edge of a brake body 15 in the form of a substantially parallelepipedal metal block, thicker at the upper and lower edges and at the height of the hinge. axis 14. The block 15 is engaged by horizontal sliding in the open section of the active part 6 and is held by friction or by any other means in this active part. The vertical outer edge of the block 15 is placed in the plane of the end of the active part 6 so that only the axis 14 protrudes relative to this plane. The two jaws 13a, 13b are articulated vis-a-vis the axis 14, in a cross arrangement.

Each jaw 13a, 13b comprises, in the upper part in the example shown, a cam 16a, 16b extending transversely. Opposite the cam relative to the axis of rotation 14, each jaw has a notched or toothed sector 17a, 17b adapted to be locked against a wall of the slide. The two walls, in this example, against which the sectors 17a, 17b come to lock are the walls of the slide parallel to the plane of the deployed deck.

The control means D of the brake comprises a part 18, in particular of synthetic material, or of plastic material, which comprises in the upper part a tab 19 at right angles. The piece 18 may, alternatively, be made of cut steel, and possibly be provided on its longitudinal sides with notches. The tab 19 is engaged and maintained in a reservation forming an upper housing of the active part 7, above the horizontal partition 7a. The piece 18, located in a vertical plane against the edge of the deck, comprises, in the upper part, two lateral extensions 20a, 20b forming anvils, which can be straight or curved. According to the realization of Fig. 5 , the lower end of the anvils 20a, 20b is folded inwards to be substantially parallel to the cams 16a, 16b. Alternatively, the anvils 20a, 20b may be formed by substantially horizontal straight extensions above the cams 16a, 16b.

The piece 18 may further comprise tabs 21a, 21b provided so as to be below the cams 16a, 16b. The tongues 21a, 21b can be curved substantially at right angles inwards. These tongues 21a, 21b constitute counter-anvils whose function is to close the jaws13a, 13b, and thus to move the notched sectors of the walls of the slide, when the two active parts 6, 7 of the blade deviate vertically. from each other, for example during the ascent of the apron.

The part 18 comprises in the upper part and in the lower part of the tongues 22 in transverse extension in the plane of the part 18 to contribute to its guidance between the walls 2a, 2b of the slide. The tongues 22 protrude laterally from the notches of the sectors 17a, 17b in the loosened position in order to prevent undesirable hooking of these notches with the wall of the slide. The upper tabs 22 may further serve as stop stop under tulip.

In the lower part, the piece 18 has a rectangular window 23 whose long side is vertical ( Fig. 3 ). This window is traversed by a screw 24, advantageously self-tapping, screwed into a bore of the axis 14. The head of the screw 24 is pressed against the piece 18 to hold it against the edge of the brake blade 8 A vertical relative displacement of the piece 18 relative to the screw 24 and to the block 15 is possible because of the rectangular window 23.

The lower end of the piece 18 has a curved portion 18a which is in sliding abutment against the edge of the blade 8, but does not fit into this blade.

Referring to Fig. 9 to 12 we can see an advantageous embodiment of the brake blade 108 and the brake B according to the invention. Elements identical or similar to elements already described above will be designated by the same reference numerals, possibly increased by the number 100; their description will not be repeated or will be carried out only briefly.

The brake blade 108 consists of the two active parts 106, 107. The lower active portion 106 is provided for insertion into the upper active portion 107.

The support on which the jaw 13a, 13b is rotatably mounted is formed by a vertical web 115 secured to the lower active portion 106. The veil 115 is provided on its upper edge with a horizontal hollow cylinder 114 adapted to receive the axis d 124 articulation of the jaw. The shaft 124 may comprise a self-tapping screw portion.

The upper leg 19 of the anvil piece 18 is introduced into a reservation adjusted to its shape. The hinge axis 124 of the two cams 13a, 13b is screwed directly into a hole 114a formed in the upper cylinder 114 of the active part 106, thus avoiding an intermediate piece and giving greater strength and reliability to the assembly. .

The lower housing of the active part 107 in which the lower active part 106 is engaged has, substantially at mid-height, two inwardly projecting T-shaped ribs 25 forming stop and guide pins on both sides. other of the veil 115.

The upper cylinder 114 comprises, on either side of its junction with the web 115, a rib 26 projecting radially adapted to abut against a lug 25 at the end of the low stroke of the portion 106.

The brake blade 108 consisting of the parts 106 and 107 is made of aluminum, or light alloy, spun.

That said, the operation of the mechanical brake and shutter according to the invention is as follows.

When lowering the shutter, as soon as the deck 1 meets an obstacle by its lower edge, the two active parts 6, 7 or 106, 107 of the brake blade 8 or 108 are approaching. The anvils 20a, 20b of the part 18 are pressed on the respective cams 16a, 16b of the jaws 13a, 13b which swing outwardly. The teeth or notches of the sectors 17a, 17b of the jaws cling to the walls of the corresponding slide 2a, 2b. This creates a blockage of the descent.

The weight of the apron 1 that accumulates on the brake blade 8, 108 will create additional pressure on the cams 16a, 16b and the blockage will be even more powerful because the teeth of the notched sectors 17a, 17b will tend to s' further apart and to exert even stronger pressure against the inner walls of the slide 2a, 2b, with effective blocking.

The proposed system is therefore self-locking because the higher the load, the more the teeth of the jaws 13a, 13b exert pressure against the inner walls of the slide.

To loosen the brake system, it is necessary to slightly raise the apron 1 to allow the two jaws 13a, 13b to get closer so that the teeth of the notched sectors 17a, 17b are no longer in interference with the slide and that the deck 1 can descend again normally behind the scenes.

The presence of the anvil 21a, 21b under the cams 16a, 16b ensures that the jaws 13a, 13b close again well during the lifting the apron 1 since the anvils act on the cams 16a, 16b to bring the jaws closer together. The counter-anvils 21a, 21b provide the advantage of ensuring the movement and the position of the jaws 13a, 13b for the case where they tend to move poorly over time, either because of soiling in the backstage, either due to galling due to the onset of corrosion. In this case, the own movement of the parts due to gravity would no longer be sufficient to ensure the approximation of the jaws.

The presence of the anvil 21a, 21b also ensures proper operation with a slightly inclined flap, for example roof flap, for which the risk of jamming a person resting on the rim of the roof flap is real.

The operation of the brake according to the invention has the advantage of keeping the apron 1 locked in position, even if the obstacle can partially disengage. This avoids the apron comes to apply again his load against the obstacle during disengagement.

Claims (11)

Roller shutter comprising an apron guided on each side by a slide, and suitable for winding around a tube, the deck being composed of blades articulated between them, the upper blade being connected to the tube, the shutter being equipped with a brake, - the apron (1) comprising at least two adjacent active parts (6,7; 106,107), mounted so as to be close to each other when the deck, in its descent, meets an obstacle or a stop, - The brake being a mechanical brake (B) which comprises a control means (D) sensitive to the approximation of the two active parts (6,7; 106,107), and at least one wedging member (K) connected in vertical translation to the apron , the wedging member (K) comprising at least one jaw (13a, 13b) rotatably mounted on a support connected to one of the active parts (6, 7, 10, 10, 107) of the apron, the tilting of the jaw (13a, 13b) being caused by the displacement of the control means (D) which cooperates with a cam, provided on the jaw, in response to the displacement of the two active parts of the deck, each jaw having a serrated or toothed sector adapted to come to lock against a wall of the slide, characterized in that the serrated or toothed sector of the jaw is located, relative to the hinge axis (14, 124), on the opposite side to a cam (16a, 16b) which extends transversely, - The control means (D) of the brake comprises a part (18) located in a vertical plane against the edge of the deck and having two lateral extensions (20a, 20b), which come to press the respective cams (16a, 16b) of the jaws (13a, 13b) which swing outwardly. Shutter according to claim 1, characterized in that the piece (18) has tabs (21a, 21b) projecting inwardly so as to be below the cams (16a, 16b), to close the jaws ( 13a, 13b), and thus move the notched sectors of the walls of the slide, when the two active parts (6, 7) of the blade deviate vertically from one another. Shutter according to claim 1 or 2, characterized in that the two active parts are provided at a braking blade (8, 108) of the apron, which consists of the two active parts (6, 7; 'a in the other, and able to move relative to each other in the plane of the deployed deck. Shutter according to claim 3, characterized in that the brake blade (8,108) constitutes the lower blade of the deck. Shutter according to any one of the preceding claims, characterized in that a mechanical brake (B) is provided on each side of the apron to cooperate with the corresponding slide (2a, 2b). Shutter according to any one of the preceding claims, characterized in that the jaw (13a, 13b) is rotatably mounted about a horizontal axis (14; 124) parallel to the plane of the deployed deck. Shutter according to any one of the preceding claims, characterized in that the wedging member comprises two jaws (13a, 13b) rotatably mounted in opposite directions. Shutter according to any one of the preceding claims, characterized in that the support on which the jaw (13a, 13b) is rotatably mounted comprises a body (15) inserted into the end of the lower active part (6) of the blade braking device, this body having an axis (14) on which the jaw (13a, 13b) is hinged. Shutter according to any one of claims 1 to 7, characterized in that the support on which the jaw (13a, 13b) is rotatably mounted is formed by a vertical web (115) integral with the lower active portion (106), which veil is provided on its upper edge with a horizontal hollow cylinder (114) adapted to receive an axis of rotation (124) of the jaw, the lower active portion (106) being provided for insertion into the upper active part (107). ). Mechanical roller shutter brake according to one of the preceding claims, comprising: - a brake blade (8, 108) comprising two adjacent active parts (6, 7; 106, 107) mounted so as to be close to each other when the deck, in its descent, encounters an obstacle or an abutment , - Control means (D) responsive to the approximation of the two active parts of the brake blade, and at least one wedging member (K) intended to be connected in vertical translation to the apron, the wedging member (K) comprising at least one jaw (13a, 13b) rotatably mounted on a support connected to one of the active parts (6, 7, 10, 10, 107) of the apron, the tilting of the jaw (13a, 13b) being caused by the displacement of the control means (D) which cooperates with a cam, provided on the jaw, in response to the displacement of the two active parts of the deck, each jaw having a serrated or toothed sector adapted to come to lock against a wall of the slide, characterized in that the serrated or toothed sector of the jaw is located, relative to the hinge axis (14, 124), on the opposite side to a cam (16a, 16b) which extends transversely, - The control means (D) of the brake comprises a part (18) located in a vertical plane against the edge of the deck and having two lateral extensions (20a, 20b), which come to press the respective cams (16a, 16b) of the jaws (13a, 13b) which swing outwardly. Braking blade for a shutter according to any one of claims 1 to 9, comprising two adjacent active parts (106, 107), mounted so as to be close to each other when the deck, in its descent, meets a obstacle or a stop, characterized in that the lower active portion (106) comprises a vertical web (115) integral with this lower active portion, which sail is provided on its upper edge with a horizontal hollow cylinder (114) adapted to receive an axis of rotation (124) of the jaw, the lower active portion (106) being provided for insertion into the upper active portion (107).

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