FR2930586A1 - ROLLING SHUTTER EQUIPPED WITH A BRAKE, BRAKE AND BRAKE BLADE FOR SUCH A WHEEL. - Google Patents

Abstract

Roller shutter comprising an apron guided on each side by a slide, and adapted to wrap around a tube, the apron being composed of blades articulated together, the upper blade being connected to the tube, in particular by a safety lock , the shutter being equipped with a brake; the apron comprises a lower active part (6) and an upper active part (7), mounted so as to be close to each other when the deck, in its descent, meets an obstacle or a stop, and the brake is a mechanical brake (B) which comprises a control means (D) sensitive to the approximation of the two active parts (6, 7), and at least one wedging member (K) connected in vertical translation to the apron, the means of control (D) being able to cause, during the approach of the active parts (6,7), a transverse projection of the wedging member (K) in a slide for locking against a wall of this slide.

Description

ROLLER COMPRISING A BRAKE, BRAKE AND BRAKE BLADE FOR SUCH A SHUTTER.

The invention relates to a roller shutter of the type of those which comprise an apron guided on each side by a slide, and which is adapted to wrap around a tube, the apron éi ant consisting 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. There are motorized controls that are controlled: - by a non-maintained contact command, that is to say that the operator gives the descent signal and then can leave the apron in the closing position knowing that the engine will stop by itself 20 when a low end of travel contact is reached, - or by a remote control (a remote control, a clock, a control automaton reacting to the wind, to the brightness, to the rain, to a attempted intrusion or any other parameter). Such motorized controls may 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 engines are set to stop at the low point in an angular position of the predefined tube 30 (there are still manually adjustable motors of the limit switches where the low point is adjusted in a precise position ). Under these conditions, if the shutter is equipped with automatic locks (that is to say rigid links in thrust between the deck and the winding tube :), in the presence of an obstacle during the descent of the deck, the driving torque acting on the tube will be applied in pressure on the apron by means of the automatic locks, and the lower blade can exert a very great effort on the obstacle. One can fear the worst if it is a person, especially a child, stuck under the lower final blade.

The object of the invention is, above all, to provide a brake system integrated into the apron, in particular to the final blade. 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. According to the invention, a roller shutter of the kind defined above is characterized in that: the apron comprises at least two adjacent active parts, namely a lower active part and an upper active part, mounted so as to be able to move closer to each other; one of the other when the deck, in its descent, meets an obstacle or a stop, - and the brake is a mechanical brake which comprises a control means responsive to the approximation of the two active parts, and at least one wedging member linked in vertical translation to the apron, the control means being able to cause, during the approach of the active parts, a transverse projection of the wedging member in a slide for locking against a wall of this slide. 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 may be supplemented by a system for sending information to an electric motor driving the winding tube, for stopping the motor or reversing 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 wedge member is mounted to protrude in a plane perpendicular to the plane of the deployed apron. The two active parts of the apron, being able to approach one another, are advantageously provided at a braking blade of the apron, which consists of the two active parts nested one inside the other, and can move relative to each other in the plane of the deployed deck. The brake blade is preferably the lower blade of the deck.

Generally, a mechanical brake is provided on each side of the apron to cooperate with the corresponding slide. Advantageously, the wedging member comprises 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 in response to the displacement of the two parts. active apron. The control means comprises a part engaged in the other active part of the braking blade, this part comprising an anvil capable of acting on a cam provided on the jaw to cause the tilting of the jaw towards the outside, during the bringing the two active parts of the deck closer together. Preferably, the jaw is rotatably mounted about a horizontal axis parallel to the plane of the deployed deck. Advantageously, the wedge member comprises two jaws rotatably mounted in opposite directions. These jaws may have a clean notched sector to cooperate with a wall of the slide. The support on which the jaw is rotatably mounted may comprise a body inserted into the end of the lower active part of the braking blade, this body having an axis on which the jaw is hinged. According to an advantageous variant, the support on which the jaw is rotatably mounted is 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 lower active portion being adapted to fit into the upper active portion. The invention also relates to a mechanical brake roller shutter characterized in that it comprises: - a brake blade comprising two adjacent active parts mounted so as to be closer to one another when the deck, in its descent encounters an obstacle or a stop, a control means responsive to the bringing together of two active parts of the brake blade, and at least one wedging member intended to be connected in vertical translation to the apron, the means of control being able to cause, during the approach of the active parts, a transverse projection of the wedging member in a slide for locking against a wall of this slide. Advantageously, the wedging member comprises two jaws rotatably mounted in opposite directions on a support intended to be connected to one of the active parts of the apron, the tilting of the jaws being caused by the displacement of the control means in response to the displacement. two active parts of the deck. The control means may comprise a part engaged in the other active part of the apron, this part comprising an anvil adapted to act on a cam provided on the jaw to cause the tilting of the jaw towards the outside, when bringing the two active parts of the apron. The invention also relates to a brake blade for a roller shutter or a mechanical brake as defined above, characterized in that it comprises two adjacent active parts, namely a lower active part and an upper active part, mounted so as to to be able to approach each other when the deck, in its descent, meets an obstacle or an abutment. Preferably, the lower active portion comprises a vertical web integral with this lower active portion, 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 to fit into the upper active part. The invention consists, apart from the arrangements set out above, in a certain number of other arrangements which will be more explicitly discussed below with respect to an exemplary embodiment described in detail with reference to the appended drawings. but which is in no way limiting. In these drawings: 1 is a schematic perspective view, from the front right, of a roller shutter in the closed position, with the lower part torn from the right slide. Fig. 2 is a perspective view of the mechanical brake according to the invention and the 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 extended position, without the apron blade. Fig. 5 shows, similarly to FIG. 4, the jaws in the retracted position 5, 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 much as possible, with the jaws in the retracted position. Fig. 7 is an elevational view of the outside of the brake with the lower lo portion 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 nor 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 and the brake control means, the active parts being brought together. Referring to Fig.1 of the drawings, there can be seen a roller shutter V having an apron 1 guided on each side by a slide 2a, 2b with horizontal cross section U. The concavities of the scenes are turned towards each other. 'other. The apron 1 is adapted to wrap around a tube 4 of horizontal axis located above the upper end of the slides and driven by a motor M with gear, 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 are opposed by arc -boutement, unauthorized lifting of the lowered deck The apron 1 has, as illustrated in FIG. 2 and 3, at least two adjacent active parts, namely a lower active portion 6 and an upper active portion 7 mounted so as to be able to approach each other in the vertical direction when the apron 1, in its descent, encounter an 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 portion 6 is formed by a hollow cross sectional profile as illustrated in FIG. 6, extending over the entire width of the deck. The profile is open at each end. The cross section of the active portion 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 is substantially halfway up. The horizontal leg 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 in FIG. 6 where the active parts 6, 7 are spaced apart at most, at a position illustrated in FIG. 8 where the active parts 6, 7 are brought closer to the maximum; 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 sensitive to the approximation of the two active parts 6, 7, and at least one wedging member K adapted to protrude transversely for locking 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 articulation axis 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 35 of a brake body 15 in the form of a substantially parallelepipedal metal block, thicker on the upper and lower edges and the height of the 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 toothed sector 17a or 17b, 17b adapted to come to lock 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 cut steel, which comprises in the upper part a tab 19 bent at right angles provided on its longitudinal sides with notches. This tab 19 is engaged and fixed in a reservation forming 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 curved lateral extensions forming anvils 20a, 20b. As seen in FIG. 5, the lower end of the anvils 20a, 20b is folded inwards to be substantially parallel to the cams 16a, 16b. The part 18 further comprises tabs 21a, 21b bent substantially at right angles inwards so as to be below the cams 16a, 16b. These tongues 21a, 21b constitute counter-anvils 25 whose function is to close the jaws 13a, 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 guiding 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 a stop under tulip. In the lower part, the piece 18 has a rectangular window 23 whose long side is vertical (Figure 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 Figs. 9 to 12 we can see an advantageous embodiment of the brake blade 108 and 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 integral with the lower active portion 106. The veil 115 is provided with on its upper edge of a horizontal hollow cylinder 114 20 adapted to receive the hinge axis 124 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 together. The lower housing of the active part 107 in which the lower active part 106 is engaged comprises, substantially at mid-height, two inwardly projecting T-shaped ribs 25 forming stop lugs 30 and guiding on the other hand. 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 which 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 have a tendency to s further apart and exert a 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 apron 1 can go down again normally behind the scenes.

The presence of the anvils 21a, 21b under the cams 16a, 16b makes it possible to guarantee that the jaws 13a, 13b close well when the apron 1 is lifted since the anvils act on the cams 16a, 16b to cause the connection jaws. The counter-anvils 21a, 21b provide the advantage of ensuring the movement and the position of the jaws 13a, 13b in the event that they have a tendency to move poorly over time, either because of soiling in the bottom of the wings, either because of galling due to the beginning 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 anvils 21a, 21b also makes it possible to ensure correct operation with a slightly inclined flap, for example a roof flap, for which the risk of jamming of 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. 35

Claims (17)

REVENDICATIONS1. 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, characterized in that: - the apron (1) comprises at least two adjacent active parts (6,7; 106,107), namely a lower active part (6,106) and an upper active part (7,107), mounted so to be able to approach one another when the deck, in its descent, meets an obstacle or a stop, - and the brake is a mechanical brake (B) which comprises a control means (D) sensitive to the approximation two active parts (6,7; 106,107), and at least one wedging member (K) connected in vertical translation to the apron, the control means (D) being able to cause, when the active parts (6) are brought together; , 7; 106, 107), a transverse projection of the wedge organ nt (K) in a slide (2a, 2b) for locking against a wall of this slide. 2. Shutter according to claim 1, characterized in that the wedging member 20 (K) is mounted so as to project in a plane perpendicular to the plane of the deck (1) deployed. 3. Shutter according to claim 1 or 2, characterized in that the two active parts are provided at a brake blade (8, 108) of the apron, which consists of the two active parts (6,7; ) nested one inside the other, and can move relative to each other in the plane of the deck deployed. 4. Shutter according to claim 3, characterized in that the brake blade 30 (8,108) constitutes the lower blade of the deck. 5. Shutter according to any one of the preceding claims, characterized in that a mechanical brake (B) is provided on each side of the deck to cooperate with the corresponding slide (2a, 2b). 6. Shutter according to any one of the preceding claims, characterized in that the wedging member (K) comprises at least one jaw (13a, 13b) rotatably mounted on a support connected to one of the active parts (6, 7; 106, 107), the tilting of the jaw (13a, 13b) being caused by the displacement of the control means (D) in response to the movement of the two active parts of the apron. 7. Shutter according to claim 6, characterized in that the control means (D) comprises a part (18) engaged in the other active part (7,6; 107,106) of the apron, this piece (18) comprising an anvil (20a, 20b) adapted to act on a cam (16a, 16b) provided on the jaw (13a, 13b) to cause the tilting of the jaw to the outside, when bringing together the two active parts of the deck. 8. Shutter according to claim 6 or 7, characterized in that the jaw (13a, 13b) is rotatably mounted about a horizontal axis (14; 124) parallel to the plane of the deployed deck. 9. Shutter according to one of claims 6 to 8, characterized in that the wedging member comprises two jaws (13a, 13b) rotatably mounted in opposite direction. 20 10. Shutter according to one of claims 6 to 9, characterized in that the jaws (13a, 13b) comprise a notched sector (17a, 17b) adapted to cooperate with a wall of the slide. 11. Shutter according to one of claims 6 to 10, 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 brake blade, this body having an axis (14) on which the jaw (13a, 13b) is articulated. 30 12. Shutter according to one of claims 6 to 10, 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 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 adapted to fit into the upper active part (107). 13. Mechanical roller shutter brake according to any one of the preceding claims, characterized in that it comprises: a braking blade (8, 108) comprising two adjacent active parts (6, 7; to be able to approach each other when the apron, in its descent, meets an obstacle or a stop, - a control means (D) sensitive to bringing the two active parts of the braking blade closer together, - and at least one wedging member (K) intended to be connected in vertical translation to the apron, the control means (D) being able to cause, during the approach of the active parts, a transverse projection of the wedging member (K) in fo a slide for a block against a wall of this slide. 14. Mechanical brake according to claim 13, characterized in that the wedging member (K) comprises two jaws (13a, 13b) rotatably mounted in opposite directions on a support intended to be connected to one of the active parts of the 15 aprier, the tilting of the jaws being caused by the displacement of the control means (D) in response to the movement of the two active parts of the deck. 15. Mechanical brake according to claim 14, characterized in that the control means (D) comprises a part (18) engaged in the other active part of the deck, this part comprising an anvil (20a, 20b) adapted to act on a cam (16a, 16b) provided on the jaw (13a, 13b) to cause the tilting of the jaw towards the outside, on bringing the two active parts of the apron closer together. 25 16. Blade brake for a shutter according to any one of claims 1 to 12, or a mechanical brake according to any one of claims 13 to 15, characterized in that it comprises two adjacent active parts (6,7; 106, 107), namely a lower active part (6, 106) and an upper active part (7, 107), mounted so as to be close to each other when the deck, in its descent, encounters an obstacle or stubborn, 17. Braking blade for a shutter according to claim 16, 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 adapted to be inserted into the upper active part (107).