FR2867295A1 - OPENING ANTI-BREAKING DEVICE - Google Patents

Abstract

Burglar-proof device for an opening such as a door, a window or a shutter, capable of being fixed on a receiving surface located in particular in the vicinity of at least part of the periphery of the opening, comprising an elongate element (6) having a bearing surface facing towards said sash receiving surface; means (11) for maintaining this elongated element on said receiving wall at locations spaced apart from each other; and capacitive detection means (24) interposed between said receiving surface of the opening and said bearing surface of said elongated element and adapted to undergo variations in capacitance when the distance between this receiving surface and this bearing surface varied.

Description

OPENING ANTI-BREAKING DEVICE.

  The present invention relates to a device for signaling an attempted burglary on an opening, such an opening can be in particular a door or a window of a building or a house, installed outside or on the outside. interior, a shutter with one or more swinging wings, a door or a cover of a piece of furniture such as a chest.

  One of the common ways to break into a building, house, or room or to force a safe is to engage a penetrating tool such as a crowbar or chisel between the door and its frame. to reach and destroy the bolt of the lock or the latch or the hinges of the door or the latter.

  Several solutions have already been proposed to detect such tampering attempts.

  In particular, the international patent application WO-A-99/38134 describes an anti-burglar device which comprises an elongate tubular element which is fixed firmly on the outer face of the frame of an opening and which has, on the side of the slot separating the frame and the door, a deformable wall capable of acting on an electric displacement sensor.

  Other known burglar-proof devices are designed to be installed in the space separating the opening and its frame. This is the case in particular of the anti-burglar device described in the European patent application EP-A-0 208 876, which comprises two longitudinal fixed parts distant from each other and whose space between them is obstructed by a longitudinal blade pivoting against a spring when it is urged by a burglar.

  Moreover, the document W-A-00/03335 describes a device which comprises a fixed part, a movable part and a displacement sensor sensitive to displacements of the fixed part towards the moving part against a spring.

  The object of the present invention is to propose an anti-interference device of another kind.

  The burglar-proof device according to the invention, for an opening such as a door, a window or a shutter and capable of being fixed on a reception surface situated in particular in the vicinity of at least a part of the periphery of the opening, comprises an elongate member having a bearing surface facing said receiving surface; means for maintaining said elongated member on said receiving surface at spaced apart locations; and capacitive sensing means interposed between said receiving surface and said bearing surface of said elongated member and adapted to undergo capacitance variations when the distance between said receiving surface and said bearing surface varies and providing a corresponding signal.

  According to a variant of the present invention, said capacitive detection means comprise at least one elongated metal part of the elongate element and at least one elongated metal frame placed in the vicinity of this metal part and fixed on said receiving surface of the opening.

  According to the present invention, said at least one metal reinforcement is preferably fixed on said receiving surface of the opening by a first adhesive tape and is fixed on said support surface of the elongated element by a second adhesive tape, the tearing resistance of said first adhesive tape being greater than the tear resistance of said second adhesive tape.

  According to another variant of the present invention, said capacitive detection means comprise at least two elongate metal frames placed in the vicinity of each other and one of which is fixed on said receiving surface of the opening and the the other is attached to said bearing surface of the elongate member.

  According to the present invention, said at least two metal reinforcements are preferably arranged at a distance between two insulating strips folded so as to place these reinforcements in the vicinity of one another.

  According to the present invention, one of said armatures is preferably wider than the other.

  According to the present invention, the armature integral with said elongated element is preferably wider than that fixed on the opening.

  According to the present invention, said at least one metal armature preferably comprises at least one metal ribbon.

  According to the present invention, said at least one metal reinforcement comprises at least one metal wire.

  According to the present invention, said elongated member is tubular and the outer connection means of said capacitive sensing means extend into said elongate tubular member.

  According to the present invention, said external connection means can advantageously pass through the opening.

  According to the present invention, said elongated element preferably comprises an elongated base held on said opening and an elongate cover fixed on the base, the means for holding the base being hidden by the cover and the means for fixing the cover on the base. base being hidden when the opening is in the closed position.

  According to the present invention, said base preferably comprises a base section of L-shaped section, a first branch is fixed on the opening by spaced screws therethrough and said cover comprises a covering section engaged with the end of this first branch and bearing on the end of the second branch, screws passing through the second branch of the base profile and being engaged in an elongated slot of the cover profile.

  According to the present invention, said bearing surface of the elongated element preferably has a recess in which are housed said capacitive detection means.

  According to the present invention, said elongated element may advantageously be fixed on said receiving surface by means of spring means acting in the direction of the support of this elongated element on this receiving surface.

  According to a variant of the present invention, the device is fixed on a bearing surface of the opening so as to extend near at least one fixed part adjacent to this opening.

  According to another variant of the present invention, the device is fixed on a bearing surface of at least one fixed part adjacent to the opening so as to extend close to the latter.

  According to the present invention, said capacitive detection means are preferably connected to electronic processing means adapted to deliver an alarm signal when the variation of the capacitance of said capacitive detection means is greater than a predetermined threshold.

  According to the present invention, said electronic processing means preferably comprise means for adjusting the value of said threshold.

  According to the present invention, the device preferably comprises means for inhibiting said processing means and / or said alarm signal when the opening is moved away from its closed position by at least a predetermined distance.

  According to the present invention, said inhibition means may advantageously comprise a switch changing state when the opening is moved away from its closed position by at least a predetermined distance.

  According to the present invention, said inhibition means may advantageously comprise a switch for disconnecting the power supply of said processing means when the opening is moved away from its closed position by at least a predetermined distance.

  According to the present invention, said inhibition means may advantageously comprise a cut-off switch of the line delivering said alarm signal.

  According to the present invention, said processing means can advantageously be reactivated after a predetermined delay following the deactivation of said inhibiting means.

  The present invention will be better understood from the study of anti-bursting devices described by way of non-limiting examples and illustrated by the drawing in which FIG. 1 represents a front view of an opening equipped with an anti-burglary device according to the invention. invention; FIG. 2 represents a cross-section of the aforementioned anti-intrusion device; FIG. 3 represents a cross-section of a capacitive detector according to the invention; FIG. 4 represents a cross-section of another capacitive detector according to the invention; Figure 5 shows a front view of an anti-tampering device part, cover removed; Figure 6 shows an enlarged front view of a corner of the burglar-proof device, cover removed; Figure 7 shows a cross section of an upper part of the aforementioned burglar-proof device; FIG. 8 represents an electronic diagram of the above-mentioned anti-bursting device and FIG. 9 represents a cross-section of the aforesaid anti-tampering device;

  Referring to the figures, it can be seen that there is shown an external view of an opening such as a door 1 in the closed position in a door frame 2 which has a flange 3 covering the peripheral portion of the outer face 4 from the door 1.

  The door 1 is equipped with an anti-intrusion device 5 which has vertical bars 5a and 5b which extend along and at a short distance from the vertical parts of the flange 3 and a horizontal upper bar 5c which extends along at a short distance from the horizontal part of the rim 3.

  These bars 5a, 5b and 5c of the burglar-proof device 5 comprise an elongated element 6 which, in the example shown, is tubular. This. elongate member 6 comprises a profiled base 7 of L-shaped section which has a longitudinal branch 8 which extends parallel to the flange 3 of the frame 2 and a longitudinal branch 9 bearing on the front face 4 of the door 1 and which s extends to the opposite of this edge 3.

  Spaced along its length and at relatively great distances, the elongate base has through-holes 10 through which fastening screws 11, whose rods are screwed into the door 1 and whose head 1 bears against the outer face of the door. branch 9.

  The elongated element 6 further comprises a profiled cover 12 which has a longitudinal branch 13, a longitudinal edge has a flange 14 engaged below the reduced thickness edge of the branch 9 of the base 7 and the other edge has an inclined portion 15 resting on an inclined face 16 of the edge of the branch 8 of this base, the branch 13 being arched transversely so as to have a convex outer face.

  The cover 12 furthermore has longitudinal branches 17 and 18 which extend from the concave face of its arcuate branch 13 in the direction of the branch 8 of the base 7 and which delimit between them a longitudinal slot 19.

  The branch 8 of the base 7 has through holes 20 through which are engaged fastening screws 21 whose rods are screwed into the slot 19 of the cover 12.

  Thus, between the branch 18 of the cover 12 and the branch 9 of the base 7 is formed a longitudinal corridor 22.

  The branch 9 of the base 7 has, in its face bearing against the door 1, a flat longitudinal recess 23 formed on the side of the branch 8 with respect to the orifices 10.

  The vertical bars 5a and 5b of the detection device 5 are respectively equipped with a longitudinal capacitive detector 24 disposed in their recess 23.

  According to a variant shown in FIG. 3, such a capacitive detector 24a comprises a metal reinforcement consisting of a longitudinal strip 25 sandwiched between an adhesive longitudinal strip 26 and an insulating longitudinal strip 27, as well as an adhesive longitudinal strip 28 stuck on the other side of this insulating tape 27. The adhesive tape 26 is glued against the bottom of the recess 23 of the branch 9 of the base 7 of the elongated element 6 and the adhesive tape 28 is glued to the front face 4 of the the door 1.

  According to this variant, the longitudinal branch 9 of the metal base 7 constitutes a second metal reinforcement producing with the longitudinal reinforcement 25 a capacitive coupling, this reinforcement being clearly narrower than the width of the branch 9 of the elongated element 6.

  The tear resistance of the adhesive tape 26 is much greater than the tear resistance of the adhesive tape 28.

  Thus, if the elongated element 6 is spaced apart from the end face 4 of the door 1, the metal armature 25 remains integral with the door 1 and the distance between this metal armature 25 and the arm 9 of the elongate element 6 varies. , then modifying the capacitive coupling between the latter.

  According to another variant shown in FIG. 4, another capacitive detector 24b comprises two insulating strips 29 and 30 contiguous between which are arranged at a distance and in parallel two metal strips 31 and 32 constituting metal frames and folded so as to form a crushed U such that the reinforcements 31 and 32 extend in the vicinity of each other and parallel to each other, the armature 31 situated on the side of the door 1 being narrower than the armature 32 located on the side of the branch 9 of the elongated element 6.

  The median longitudinal portions of the opposite faces of the capacitive detector 24b are respectively fixed against the bottom of the recess 23 of the branch 9 of the base 7 of the elongate element 6 and on the front face 4 of the door 1, for example by adhesive strips 33 and 34.

  Thus, if the elongated element 6 is spaced apart from the end face 4 of the door 1, the metal armature 31 remains integral with the door 1 and the metal armature 32 remains secured to the arm 9 of the elongated element 6 and the distance between these metal frames 31 and 32 varies, then changing the capacitive coupling between them.

  According to another embodiment, the frame 25 and the frame 31 could be replaced by metal son.

  As shown in FIGS. 5, 6 and 7, electrical connection wires 35 extend in the corridor 22 of the horizontal bar 5c and in the upper part of the corridors 22 of the vertical bars 5a and 5c and are connected to the aforementioned reinforcements of the respective capacitive sensors 24 through passages 36 formed in their branch 9.

  As shown more specifically in FIG. 7, the wires 35 are connected to an electronic circuit arranged in a housing 37 fixed against the upper part of the inner face 38 of the door 1, passing through an orifice 39 formed in the branch 9 of the upper horizontal bar 5c and a hole 40 formed through the door.

  The installation of the burglar-proof device 5 can be carried out in the following manner.

  The base 7 of the vertical bars 5a and 5b and the base 7 of the upper horizontal bar 5c are placed and fixed by screws 11 against the outer face of the door 1, taking care to interpose in the recess 23 vertical bars 5a and 5b a capacitive detector 24.

  The wires are installed as previously described.

  With the door 1 removed or opened, the cover 12 of the upper horizontal bar 5c and the vertical bars 5a and 5b are placed and fixed by screws 21. The heads of the screws 11, the detectors 24 and the wires 35 are then hidden and inaccessible.

  When the door 1 is brought to its closed position in the frame 2, the heads of the screws 21 are opposite the flange 3 of the frame 2 and are therefore hidden and inaccessible.

  Of course, the bases 7 and the covers 12 are cut in wedges adapted to their adjacent ends.

  Then, the housing 37 is installed and the wires 35 are connected to the electronic circuit it contains.

  It follows from the above that if an intruder wants to penetrate a break-in tool between the door 1 and the frame 2, this tool first meets the elongated element 6 of the burglar-proof device 5. That this tool is introduced between the door 1 and the elongated element 6 or between the flange 3 of the frame 2 and this elongated element 6, in any case, this elongated element 6 will deform against its elasticity, between the fixing screws 11 , thus producing a variation of the gap between the aforementioned armatures of the capacitive detector 24 and consequently a variation of the capacitance.

  Referring to FIG. 8, it can be seen that the housing 37 can enclose an electronic circuit 41 for scanning capacitance detector capacitor 24 capacitance variations.

  Advantageously, this electronic processing circuit 41 may be equipped with threshold matching means which scrutinizes such variations at regular intervals.

  If the deviation of a measured value is less than a given percentage of the value measured previously, the circuit 41 records this new measurement as a new reference value for the next measurement. Such an arrangement makes it possible to overcome slow variations in the capacitance of the capacitive detector 24, not due to aggression.

  Thus, the aforementioned reference value used by the electronic circuit 41 to trigger or not an alarm constitutes a predetermined adaptive threshold.

  If, on the other hand, the deviation of a measured value is greater than the said determined percentage, the electronic circuit reduces the measurement intervals for confirmation and sends a control signal, for example, to an integrated siren 42 and / or to a radio transmitter 43 for transmission. an alarm signal to a central unit of an associated alarm system. This exceeding of the reference value is indeed an indication that the burglar-proof device 5 is attacked.

  The electronic circuit 41 may also be equipped with muting means constituted for example by a magnetic breaking switch 44 associated with a magnet 45 fixed on the upper horizontal bar of the frame 2. This switch 41 may be installed on a connecting line of the electrical power supply of the electronic circuit 41 or on a connecting line of this circuit to the siren 42 and to the telephone transmitter 43. Thus, when the door 1 is open, from the will of the occupants of the protected space, deformations of the bars 5a or 5b of the burglar-proof device 5 do not cause any alarm.

  Furthermore, the electronic circuit 41 may also be equipped with means for reactivating them after a predetermined time following the closing of the switch 44 following the closing of the door 1. In a variant, after being reactivated, the electronic circuit 41 may advantageously perform a measurement of the capacity of the capacitive detector 24 to constitute a new reference value.

  In addition, in the case where the burglarproof device 5 has been assaulted but is still in good condition, when it is restarted, the electronic circuit 41 measures the capacity of the capacitive detector 24 to constitute a new value. reference.

  Of course, the electronic circuit 41 may have means known per se adapted and programmed to fulfill the arrangements described above.

  Referring to Figure 9, it can be seen that there is shown an alternative embodiment in which spacers 46 are interposed between the face 4 of the door 1 and the head 11a of the fastening screws 11, through the passages 10 of the branch 9 of the section 7 and the springs 47 are interposed between the head of the fastening screws 11 and the opposite face of this branch 9 of the profile 7. Such an arrangement makes it possible to avoid deterioration of the anti-rotation device. burglary 5 in the case of a light aggression. Indeed, the springs 47 are return members to the face 4 of the door 1 of the sections 7 and 12 when the latter are detached from this face, this up to a certain limit.

  The present invention is not limited to the examples described above. In particular, the burglar-proof device could be installed on the frame of the door, at a short distance from the periphery of its outer face and the associated electronic box fixed on the inner face of a wall adjacent to the door.

  In general, many alternative embodiments of the present invention are possible without departing from the scope defined by the appended claims.

Claims (23)

  1. Burglar-proof device for an opening such as a door, a window or a flap, capable of being fixed on a receiving surface located in particular in the vicinity of at least a portion of the periphery of the opening characterized in that it comprises an elongate member (6) having a bearing surface facing said receiving surface; means (11) for holding said elongate member on said receiving surface at spaced apart locations; and capacitive sensing means (24) interposed between said receiving surface and said bearing surface of said elongate member and adapted to undergo capacitance variations when the distance between said receiving surface and said bearing surface varies and delivering a corresponding signal.   2. Device according to claim 1, characterized in that said capacitive sensing means comprise at least one elongated metal portion of the elongated element and at least one elongate metal armature (25) placed in the vicinity of this metal portion and fixed on said receiving surface of the opening.   3. Device according to claim 2, characterized in that said at least one metal frame is fixed on said receiving surface of the opening by a first adhesive tape (26) and is fixed on said bearing surface of the elongate member by a second adhesive tape (28), the tear resistance of said first adhesive tape being greater than the tear resistance of said second adhesive tape.   4. Device according to any one of the preceding claims, characterized in that said capacitive detection means comprise at least two elongated metal frames (31, 32) placed in the vicinity of one another and one of which is fixed on said receiving surface of the opening and the other is fixed on said bearing surface of the elongated element.   5. Device according to claim 4, characterized in that said at least two metal frames are arranged at a distance between two insulating strips folded so as to place these frames in the vicinity of one another.   6. Device according to one of claims 4 and 5, characterized in that one of said frames is wider than the other.   7. Device according to any one of claims 4 to 6, characterized in that the armature integral with said elongate member is wider than that fixed on the opening.   8. Device according to any one of claims 2 to 7, characterized in that said at least one metal armature comprises at least one metal ribbon.   9. Device according to any one of claims 2 to 7, characterized in that said at least one metal frame comprises at least one metal wire.   10. Device according to any one of the preceding claims, characterized in that said elongate member is tubular and external connection means (35) of said capacitive sensing means extend in said elongated tubular member.   11. Device according to claim 10, characterized in that said outer connection means pass through the opening.   12. Device according to any one of the preceding claims, characterized in that said elongate member comprises an elongate base (7) held on said opening and an elongate cover (12) fixed on the base, the holding means of the the base being hidden by the cover and the cover fixing means on the base being hidden when the opening is in the closed position.   13. Device according to claim 12, characterized in that said base (7) comprises a base section of L-shaped section, a first branch is fixed on the opening by spaced screws therethrough and said cover (12). ) comprises a covering section engaged with the end of this first branch and bearing on the end of the second branch, screws passing through the second branch of the base profile and being engaged in an elongate slot of the covering section .   14. Device according to any one of the preceding claims, characterized in that said bearing surface of the elongated element has a recess in which are housed said capacitive detection means.   15. Device according to any one of the preceding claims, characterized in that said elongated member is fixed on said receiving surface via spring means elongated element on this surface according to any one of the claims by the fact it is fixed on a support surface extend near at least a fixed part   according to any one of the claims   preceding, characterized in that it is fixed on a bearing surface of at least one fixed portion adjacent to the opening so as to extend near the latter.   18. Device according to any one of the preceding claims, characterized in that said capacitive detection means are connected to electronic processing means (41) adapted to deliver an alarm signal when the variation of the capacity of said means of capacitive sensing is above a predetermined threshold.   19. Device according to claim 18, characterized in that said electronic processing means comprise means for adjusting the value of said threshold.   20. Device according to claim 18, characterized in that it comprises means for inhibiting (44, 45) said processing means and / or said alarm signal when the opening is removed from its closed position of at least a predetermined distance.   21. Device according to claim 20, characterized in that said inhibiting means comprise a switching state switch when the opening is spaced from its closed position by at least a predetermined distance.   acting in the sense of supporting this reception.   16. The preceding device, characterized by the opening so as adjacent to this opening.   Device 22. The device as claimed in claim 20, characterized in that said inhibiting means comprise a switch for disconnecting the power supply of said processing means when the opening is moved away from its closed position by at least one predetermined distance.   23. Device according to claim 20, characterized in that said inhibiting means comprise a cut-off switch of the line delivering said alarm signal.   24. Device according to any one of claims 20 to 23, characterized in that said processing means are reactivated after a predetermined time following the deactivation of said inhibiting means.