FR2822888A1 - ROLLING SHUTTER OF WHICH THE APRON INCORPORATES A DETECTION DEVICE, IN PARTICULAR OF AN OBSTACLE AND / OR AFFRACTION - Google Patents

Abstract

The invention relates to a roller shutter for a door, window or the like comprising an apron (2) consisting of a juxtaposition of slats (3, 4) and incorporating any detection device (8), in particular an obstacle and / or burglary, this device (8) comprising remote transmission means (9) of a signal to a management unit (10) of the operation of said roller shutter (1) and / or a central This rolling shutter is characterized by the fact that the remote transmission means (9) are of the radio frequency type and that at least one (4) of the slats, more particularly the one incorporating the detection (8), is made of an electrically conductive material, in particular aluminum, in this blade (4) being cut at least one slit (12) of perimeter determined with respect to the wavelength of the signal to be transmitted and / or to receive so as to define an antenna.

Description

periphery of a building, in particular a dwelling.

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  The invention relates to a rolling shutter for a door, window or the like comprising an apron consisting of a juxtaposition of slats and integrating any detection device, in particular of obstacle and / or break-in, this device comprising transmission means to distance of a signal towards an operation management unit of said roller shutter and / or an alarm center. The invention will find its application in the field of

  closing systems, more particularly roller shutters.

  In this regard, it is more and more frequent to motorize roller shutters so that the opening and closing control can intervene under the effect of a simple impulse on a control button within reach of the user. It is still very common to be able to control remotely, the closing and opening of

several roller shutters.

  In fact, this motorized control of the roller shutter decks poses a safety problem insofar as it is necessary to ensure, in particular during a closing command, that the deck has been properly and fully deployed. More specifically, during the deployment of this deck it is a question of avoiding that the presence of an obstacle on its trajectory generates its uncontrolled progress, in particular inside the box containing the drive mechanism, or even that , inadvertently, a user, even less if it is a child, may be trapped under said apron. Also, it is quite common to equip this type of motorized roller shutter with obstacle detection devices which can take different embodiments. Thus, for example, it is known that to install, in a slide, laterally guiding the blades of the deck, an electric coil at the terminals of which a voltage is detected under the effect of the displacement of an otherwise associated magnet. at the end of an apron blade. In short, if, during deployment, the voltage across a coil drops to zero, it is concluded that it exists on the path of the shutter deck

  rolling, of an obstacle hindering its progress.

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  It is also known to associate with the final blade of the apron of a rolling shutter an obstacle detection device in the form of a feeler which, if it is actuated during the deployment phase of this apron, triggers, at its turn, shutdown of the shutter drive motor. Due to the very design of this apron, this poses the problem of the transmission of the signal perceived through the probe in the final blade towards the unit of

  operation management of the roller shutter.

  Knowing, on the one hand, that the deployment of such a roller shutter curtain occurs, most frequently, under the effect of the sole weight of the blades and that, on the other hand, possible friction at the level of the slides can generate or oppose such a deployment, a contact transmission, necessarily presents a certain

number of drawbacks.

  Another solution consists in equipping this detection device, for example in the form of a probe, with remote transmission means, in particular of the radio type, making it possible to more easily address the detected signal in the direction of a

  rolling shutter operation management unit.

  Such means of remote transmission by radio frequency require the installation of a transmitting antenna at the level of the

  blade accommodating the detection device.

  If it is easy enough to install this antenna inside a plastic blade, more particularly through an opening made in the latter, especially on its internal side, this solution is not suitable in the case of metal blades, such as aluminum. Indeed, this prevents all

reception and / or transmission.

  In addition, the arrangement of the antenna on the surface of such a metal blade, makes it directional which, again, detracts from its effectiveness. In fact, reception of the transmitted signal is more difficult and subject to compliance with a particular arrangement of the reception means associated, as indicated above, with the unit for managing the operation of the roller shutter or even with a central 'alarm. In this regard, it should be noted that such obstacle detection means can, in certain cases, detect,

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  also, an attempted break-in by lifting the apron of the

roller shutter.

  The present invention is intended to provide a solution to the various constraints mentioned above through a simple design resulting in a cost price lower than

  current designs for a significantly improved result.

  To this end, the invention relates to a rolling shutter for door, window or the like comprising an apron constituted by a juxtaposition of blades and incorporating any detection device, in particular of obstacle and / or break-in, this device comprising means of transmitting a signal remotely towards a unit for managing the operation of said roller shutter and / or an alarm center, characterized in that the means of remote transmission are of the radio frequency type and that at least one of the blades, more particularly that incorporating the detection device, is made of an electrically conductive material, in particular aluminum, in this blade being cut at least one slot with a perimeter determined relative to the length of wave of the signal to be transmitted and / or received, so as to

define an antenna.

  According to a first embodiment, the strip of electrically conductive material defining the antenna is of the single wall type. According to another embodiment, the blade defining the antenna is of the double-walled type, only one of which is made of electrically conductive material and comprises said slot, while the other is made of synthetic material and defines with the previous one an internal volume. , in particular intended to receive all or part of

  constituent elements of the detection device.

  According to another embodiment, the blade defining the antenna takes the form of a closed profile and whose walls of electrically conductive material define an internal volume, in particular capable of receiving all or part of the constituent elements of the detection device, the internal perimeter of the section of said blade being less than the largest of the perimeter sections of the slot separating the two terminals for connecting the antenna to said slot, so that parallel to the latter is

  cut a second slot capable of defining a baffle.

  The advantages arising from the present invention consist in that the simple arrangement of one or even two slots in a blade made of electrically conductive material, in particular aluminum, makes it possible to transform the latter into an antenna capable of transmitting, with a maximum efficiency, a signal resulting from an appropriate detection device, this towards a management unit of

  operation of the roller shutter and / or an alarm center.

  It is understood, already, that if the implementation of the present invention does not cause any difficulty in the context of a rolling shutter whose deck consists of metal blades, it suffices to replace one of the blades an apron made of synthetic material, especially one provided with a device for

  detection, by a metal blade to achieve the same result.

  This modification represents, in all cases, a lower cost price compared to the installation in a plastic blade, of an antenna capable of transmitting with

similar performances.

  Other objects and advantages of the present invention

  will appear during the description which follows relating to

  to an embodiment which is given only by way of example

indicative and not limiting.

  Understanding this description will be facilitated by

  Referring to the attached drawing in which: - Figure 1 is a schematic representation of a roller shutter according to the invention; Figure 2 is a schematic plan view of a blade of the deck of this roller shutter capable of defining an antenna; - Figure 3 is a schematic representation in section

of such a blade.

  As shown in Figure 1, the present invention relates to

in the field of roller shutters.

  I1 is more particularly a roller shutter 1 comprising an apron 2 consisting of a juxtaposition of blades 3, 4 at least articulated with respect to each other and whose ends

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  lateral are guided through slides 5, 6 extending

  substantially up to threshold 7 of a door, window or the like.

  More particularly, this apron 2 incorporates a detection device 8, in particular of obstacle and / or break-in. In fact, this detection device 8 can, as illustrated in FIG. 1, be associated with the final blade 4 of the deck 2. Thus, being, for example, an obstacle detection device, when this blade final 4 encounter, along its trajectory and more particularly during the deployment of the deck 2, an obstacle hampering its progress, it can order the stopping of the course of

  the latter in the case, obviously, of a motorized shutter 1.

  To this detection device 8 are associated remote transmission means 9 capable, precisely, of transmitting a signal delivered by this device towards a management unit 10 for the operation of said roller shutter 1 and / or a central alarm 11. It will be clarified on this subject that the present invention does not apply exclusively to motorized roller shutters, but may also find its usefulness in the case of shutters with manual operation, of which the apron includes, for example, An obstacle detector Advantageously, these remote transmission means 9 are of the radio frequency type, while one of the blades 4 of the deck 2, more particularly that incorporating the detection device 8,

  comes to define, in itself, an antenna.

  To this end, this blade 4 is made of an electrically conductive material, in particular aluminum, and includes a cutout in the form of a slot 12 with a perimeter defined relative to the wavelength

  of the radio signal to be transmitted and, possibly of the signals to be received.

  Thus, according to a first embodiment, the blade 4 has a single wall. However, in such a configuration this poses the problem of integrating the detection device 8. Also, according to another embodiment, this blade defining the antenna 4 has an external wall 13 and an internal wall 14 delimiting an internal volume 15, knowing that only one of these walls 13, 14 is of an electrically conductive material, the other being made

  in an insulating material, in particular in synthetic material.

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  Finally and according to another embodiment, this blade 4, defining the antenna takes the form of a closed profile and has an external wall 13 and an internal wall 14, both in

  electrically conductive material, delimiting an internal volume 15.

  In fact, traditionally such blades result from an operation of extrusion or folding of a strip of electrically conductive material, more particularly aluminum. However, it may be, under these conditions, that the perimeter corresponding to the section 16 of such a double-walled blade 4 13, 14, is less than the largest perimeter section T1 of the slot 12, separating the two terminals 18 , 19 of the antenna connected to this slot 12, so that the antenna defined by said blade 4 agrees with a different wavelength with respect to the wavelength of the

radio signal to transmit.

  Also, it is produced at the level of said blade 4, in one of its walls 13, 14 and parallel to the slot 12, an auxiliary slot 17 coming to define a baffle and, consequently, whose dimensions are determined so that the shortest path C to connect the two terminals 18, 19 of the antenna by making the periphery of the strip 4 is greater than the largest section of

  perimeter T1 of the slot 12, separating these two same terminals 18, 19.

  The advantages which follow from the present invention consist in that, not only, the transmission means 9 can be devoid of antenna, the latter being directly defined by the blade in which they are advantageously integrated, but, in addition, a such an antenna corresponding to a metal blade of the roller shutter deck 1 has an improved range. Indeed, it is not directional and the reception of the emissions resulting from the detection device 8 by the management unit 10 or a central

  alarm 11 is carried out with very high reliability.

  Note that in the slot (s) 12, 17 of the blade 4 can

  be snapped on any plastic shutters.

  Most particularly one and / or the other of these slots 12, 17 can receive an information medium, in particular a plate.

  identifying the manufacturer of the roller shutter.

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  One can also imagine implanting in one and the other of these slots 12, 17, any type of insert, such as, for example, a temperature display device or even a temperature sensor.

solar radiation.

  The invention therefore advantageously solves the

problem.

  Although the invention has been described in connection with a particular embodiment, it is understood that it is in no way limited thereto and that there can be made various modifications to it in terms of shapes, materials and combination of these various elements, without

  for that to move away from the framework and the spirit of the invention.

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Claims (8)

claims   1. Roller shutter for door, window or similar S comprising an apron (2) consisting of a juxtaposition of blades (3, 4) and integrating any detection device (8), in particular of obstacle and / or break-in , this device (8) comprising means for remote transmission (9) of a signal in the direction of a management unit (10) of the operation of said rolling shutter (1) and / or of an alarm center ( 11), characterized in that the remote transmission means (9) are of the radio frequency type and that at least one (4) of the blades, more particularly that incorporating the detection device (8), is in one electrically conductive material, in particular aluminum, in this blade 1S (4) being cut at least one slot (12) with a perimeter determined relative to the wavelength of the signal to be emitted and / or to   receive so as to define an antenna.   2. Roller shutter according to claim 1, characterized in that the blade (4) of an electrically conductive material   and defining the antenna is of the single wall type.   3. Roller shutter according to claim 1, characterized in that the blade (4) defining the antenna is of the double wall type (13, 14) delimiting an internal volume (15) and only one of which is made of a conductive material of electricity and has said   slot (12), while the other is made of synthetic material.   4. Roller shutter according to claim 1, characterized in that the blade (4) defining the antenna takes the form of a closed profile whose walls (13, 14) are made of an electrically conductive material and delimit a internal volume (15), in particular capable of receiving all or part of the constituent elements of the detection device (8).   5. Roller shutter according to claim 4, characterized in that in one of the walls (13, 14) of the blade (4) and parallel to the slot (12) is made an auxiliary slot (17) so as to define a chicane and whose dimensions are determined so that the shortest path (C) to connect the 9 2822888   two terminals t18, 19) for connecting the antenna by making the periphery of the blade t4) is greater than the largest perimeter section tT1) of the slot tl2), separating these two same terminals (18, 19). 6. Roller shutter according to any one of   previous claims, characterized in that in the or   the slots (12, 17) of the blade (4) are snapped shutters,   more particularly in synthetic material.   7. Roller shutter according to any one of   previous claims characterized in that one and / or   the other of the slots (12, 17) of the blade (4) receives an information medium, in particular an identification plate of the roller shutter manufacturer.   8. Roller shutter according to any of the   previous claims, characterized in that in one   and / or the other of the slots (12, 17) in the blade t4) is implanted an insert, such as a temperature display device or a