FR2907079A1 - ANTI-THEFT ALARM DEVICE FOR A TANK VEHICLE OR A PLACED STORAGE LOCATION - Google Patents

Abstract

Anti-theft alarm device for a tarpaulin vehicle or tarpaulin storage areas, of the type comprising a secured tarpaulin (1) which comprises laceration detecting means connected to an alarm center making it possible to emit a warning signal via electrical connection meansThe cover (1) consists of a multilayer material, and which comprises two layers (12, 13) of electrically conductive materials, separated by a layer (14) of an electrically insulating material, which layer (14) presents characteristics of low adhesiveness to the layers (12, 13) of electrically conductive materials, and that the material of which it is made has elasticity characteristics.

Description

The present invention relates to a burglar alarm device for

  covered vehicle or storage places under canvas. The present invention relates more particularly to the field of securing the transport of goods in sheeted railway trucks or wagons, or storage and display of goods under capitals for example. The present invention may, however, apply to the protection of particular vehicles of the type comprising a hood. Awareness devices for sheeted vehicles are already known comprising a secured tarpaulin, which comprises laceration detection means, associated with an alarm center making it possible to emit a warning signal. Tarps are thus known made of a web of insulating material traversed by a linear conductor forming an electrical circuit, the cutting of the fabric, and therefore of said linear conductor, causing the breaking of said electrical circuit and the triggering of an alarm. The disadvantages of such devices consist essentially in that it is difficult after a break to repair such a fabric, and that on the other hand there may be risks of accidental rupture of the circuit, without being able to detect the location of this break thus rendering the tarpaulin unusable. The alarm devices for existing tarpaulin vehicles also have weak points at the means of connection between the secured tarpaulin and the central warning system, and also between the tractor and the semi-trailer or the trailer when there is one. . The object of the present invention is to provide an anti-theft alarm device for a tarpaulin-covered vehicle or tarpaulin-covered or tarpaulin-covered storage places, of the type comprising a secured tarpaulin which comprises means for detecting storage laceration in a tarpaulin, making it possible to remedy various aforementioned disadvantages. The anti-theft alarm device for a vehicle connected to a control panel for issuing a warning signal via electrical connection means, characterized in that said cover consists of a multi-layer material and which comprises two electrically conductive material layers, separated by a layer of electrically insulating material, which layer has low tack characteristics to said layers of electrically conductive materials, and that the material of which it is made has elasticity characteristics. The cutting of the cover of the alarm device according to the invention can be carried out by means of a cutting object in electrically conductive material, or in electrically nonconductive material. In the first case, the cutting object closes the circuit between the two layers of electrically conductive materials, and the alarm is triggered.

In the second case, the electrically non-conductive object is less sharp, it allows the fabric and the two layers of electrically conductive material to be cut, while the elasticity of the layer of insulating material renders the latter difficultly tranchable, which causes also because of its low adhesiveness to the layers of electrically conductive materials, its movement between said layers, and causes the latter to come into contact with them, and the closure of the circuit. It will be noted that this result can also be observed with a cutting object made of conductive material.

After a break-in, the covering is repaired by recreating the insulating layer between the layers of electrically conductive materials before reconstituting the seal of the assembly. According to an additional feature of the burglar alarm device according to the invention, the electrically conductive material layers consist of metal sheets, such as copper or aluminum. According to another additional feature of the anti-theft alarm device according to the invention, the electrically conductive material layers consist of fine mesh meshes, woven with metal wires, such as copper.

According to another additional feature of the anti-theft alarm device according to the invention, one of the electrically conductive material layers consists of a fine mesh, woven with metal wires, such as copper, while the other consists of a sheet of metal, such as copper or aluminum. Whatever the embodiment of the cover of the alarm device according to the invention, said device is ineffective if it is possible to disconnect the cover and the alarm center. Also, according to another additional feature of the device according to the invention, the electrical connection means which connect the cover to the alarm center consist firstly of cables comprising, in addition to electrical conductors son 15, a multilayer outer sheath that is to say two conductive layers separated by an insulating layer and forming part of a circuit connected to the alarm center, and secondly, connected to said conductive electrical wires, plug-in connection means comprising means capable of permitting the closing of the circuit in case of unplugging. According to another additional characteristic of the anti-theft alarm device according to the invention, the connection means comprise two sockets, a plug and a socket, said socket having separate contacts, as well as mobile means able to connect said contacts. when said socket is not coupled to said plug, which has suitable plugs, during coupling, on the one hand to move said movable means to break the connection between said contacts, and connect to said contacts.

According to another additional characteristic of the anti-theft alarm device according to the invention, the conductive layers of the cables are connected to the conductive electrical wires, so as to form only one circuit. The advantages and characteristics of the anti-theft alarm device according to the invention will become more clearly apparent from the description which follows and which refers to the appended drawing, which represents several non-limiting embodiments thereof. In the accompanying drawing: - Figure 1 shows a partial schematic view with cutaway of a tarpaulin of an alarm device according to the invention. - Figure 2 shows a partial schematic view with cut away of another embodiment of a tarpaulin of an alarm device according to the invention. FIGS. 3a, 3b and 3c show schematic views of connection means of an alarm device according to the invention, in different phases of use. FIGS. 4a, 4b and 4c show schematic views of another embodiment of connection means of an alarm device according to the invention, in different phases of use. - Figures 5a, 5b and 5c show schematic views of another embodiment of connection means of an alarm device according to the invention, in different phases of use.

With reference to FIG. 1, part of a cover 1 of an alarm device according to the invention can be seen. This sheet 1 consists of a multilayer material, comprising two webs 10 and 11 constituting the outer faces of the sheet 1 and made from material usually used, each covered on the inner side of a sheet, respectively 12 and 13, of material electrically conductive such as copper or aluminum, which sheets 12 and 13 are separated by a layer 14 of electrically non-conductive material, which keeps them isolated from each other.

The layer 14 is made, for example, of polyvinyl chloride, polypropylene or polyethylene, so as to have characteristics of elasticity, and low adhesiveness to the sheets 12 and 13. The two sheets 12 and 13 are part of an electrical circuit connected to an alarm center for issuing a warning signal in the event of a connection being made between the two sheets 12 and 13. Referring now to FIG. part of a variant 2 of a cover of an alarm device 5 according to the invention. This sheet 2 also consists of a multilayer material, which comprises two webs 20 and 21 constituting the outer faces of the sheet 2, each covered on the inner side of a mesh, respectively 22 and 23, with fine mesh, woven with 10 yarns. metal, such as copper or aluminum, while a layer 24 of electrically nonconductive material is interposed between the two lattices 22 and 23, and keeps them isolated from each other. The layer 24 is also constituted by a material of the characteristics of elasticity, and of low adhesiveness to the lattices 22 and 23. The two lattices 22 and 23 form part of an electrical circuit connected to an alarm central allowing to to emit a warning signal in the event of the connection being made between the two lattices 22 and 23. Thus, when attempting to break the tarpaulin 1 or 2 by cutting, with a cutting object made of conductive material electrically, the latter simultaneously contacting the two sheets 12 and 13, or the two lattices 22 and 23, establishes the contact and triggers the alarm. If the cutting object is not electrically conductive, it does not make it possible to establish contact between the two sheets 12 and 13, or the two lattices 22 and 23. On the other hand, it is necessarily less cutting than a conducting object 30 electrically, and the characteristics of the layer 14 or 24, namely on the one hand its elasticity which makes it less easily tranchable, and on the other hand its low adhesiveness to the sheets 12 and 13, or the lattices 22 and 23, which in facilitates the separation, allows its partial tearing of between the sheets 12 and 13, or the lattices 22 and 23, and the closure of the circuit by the contacting of the sheets 12 and 13, or lattices 22 and 23. Referring now to FIGS. 3a, 3b, 3c, 4a, 4b and 4c, and 5a, 5b and 5c, three embodiments of connecting means can be seen for connecting the cover 1 or 2 to an alarm center. . The cover 1 or 2 is connected to the alarm center through connecting means such as cables 3, and connection means, and whatever the embodiment of these last 10, the cables 3 comprise two son conductors 30 and 31, sheathed with coaxial layers, namely essentially two layers 32 and 33 made of an electrically conductive material, separated by a layer 34 of an electrically non-conductive insulating material, the assembly being disposed in a casing 35 made of electrically non-conductive material. The layers 32 and 33 are electrically connected to the alarm control unit, and preferably to the conductor wires, respectively 30 and 31, through connection tabs, respectively 36 and 37, and are part of the same electrical circuit, so that that the cutting of the cable 3 brings into contact the two layers 32 and 33, thereby causing the closure of the circuit and the triggering of the alarm. The connection means shown in FIGS. 3a, 3b, 3c and 4a, 4b and 4c, are intended to enable connection and / or disconnection of a cover 1 or 2 of the alarm control unit, either during docking or the unstowing of a tractor trailer, either when stowing or unstowing a trailer. These connection means are designed to prohibit a fraudulent disconnection.

Thus, it can be seen in FIGS. 3a, 3b and 3c that the connection means consist of an assembly 4 of two sockets, a plug 5 and a socket 6, each connected to the end of a cable 3 The plug 5 comprises two parallel plugs 50 and 51 35 mounted in a body 52, each connected to a conductor wire, respectively 30 and 31, and between these two plugs 50 and 51 2907079 7 parallel to it, a finger 53 in electrically non-conductive material, and longer than the plugs 50 and 51. The socket 6 comprises two parallel bushes 60 and 61, made of conductive material, arranged in a hollow body 62 and 5 each intended to receive one of the plugs 50 or 51. The body 62 also comprises a duct 63, parallel to the bushes 60 and 61, arranged therein and intended to house the finger 53. The bushing 60, respectively 61, has on the side opposite the duct 63, a light 64, respectively 65, while the duct 63 comprises, facing the light 64, a light 66, and facing the light 65, a light 67. On the other hand, the hollow body 62 contains two spring blades 68 and 69 to each of which is connected a conductive wire 30 , 31.

As can be seen more clearly in FIG. 3a, the blades 68 and 69 are configured to, at rest, come into contact with each other in the duct 63, passing through, respectively, the lights 66. and 67. In FIG. 3b, when the plugs 20 and 6 are brought together, it can be seen that, in a first step, before the plugs 50 and 51 are inserted into the sockets 60 and 61, the pin 53 enters the conduit 63 and discards the blades 68 and 69, thus breaking the electrical connection that binds them, while pushing them back into bushes 60 and 61 through the lights 64 and 66. In FIG. 3c, it can be seen that after their introduction complete in the bushes 60 and 61, the plugs 50 and 51 are in contact, respectively, blades 68 and 69, thus ensuring the connection between the two cables 3.

Such a device makes it possible to close the circuit when the two sockets 5 and 6 are disconnected. Referring now to FIGS. 4a, 4b and 4c, another embodiment of the connection means can be seen, which consist of a set 7 of two sockets, a plug 8 male 8 and a socket 9, each connected to the end of a cable 3.

The plug 8 comprises two parallel plugs 80 and 81 mounted in a body 82, each connected to a conductor wire, respectively 30 and 31. The socket 9 comprises two parallel conduits 90 and 91, arranged in a hollow body 92 and each intended to receive one of the plugs 80 or 81, the conduits 90 and 91 being open and of a length less than that of the plugs 80 or 81. The body 92 also encloses two spring blades 93 and 94, each connected to a conductive wire 30 and 31, and having a free end, respectively 95 and 96, passing in front of a conduit, respectively 90 and 91, to come abutting against a central stud 97 of electrically conductive material, adapted to perform the closing the circuit. It will be understood, with reference to FIGS. 4b and 4c, that the insertion of the plugs 80 and 81 into the ducts 90 and 91 is intended to separate the free ends 95 and 96 of the blades 93 and 94 from the central stud 97 and thus to break the circuit, and to make the connection between the pins 80 and 81 and the blades 93 and 94.

Referring now to FIGS. 5a, 5b and 5c, another variant can be seen, in which the circuit of the cable 3 is not connected to the wires 30 and 31, but constitutes a parallel circuit, and comprises for this purpose, for each jacks, pin-out means 38 and 39 connected to connection pads, respectively 36 and 37.

Claims (7)

  1) Antitheft alarm device for tarpaulin or tarpaulin storage locations, of the type comprising a tarpaulin (1) secured which includes laceration detection means connected to an alarm center for issuing a warning signal by the intermediate of electrical connection means, characterized in that said cover (1) consists of a multilayer material, and which comprises two layers (12, 13; 22, 23) of electrically conductive materials, separated by a layer (14; ) an electrically insulating material, which layer (14; 24) has low tack characteristics to said layers (12, 13; 22, 23) of electrically conductive material, and that the material of which it is made has characteristics of elasticity.   2) anti-theft alarm device according to claim 1, characterized in that the electrically conductive material layers consist of metal sheets (12, 13), such as copper or aluminum.   3) anti-theft alarm device according to claim 1, characterized in that the layers of electrically conductive materials consist of meshes (22, 23) with fine mesh, woven with metal son, such as copper or copper. aluminum.   4) Burglar alarm device according to claim 1, characterized in that one of the layers of electrically conductive material consists of a mesh (22, 23) with fine mesh, woven with metal son, such as copper, while the other consists of a sheet (12, 13) of metal, such as copper or aluminum   5) anti-theft alarm device according to any one of the preceding claims, characterized in that the electrical connection means which connect the cover to the alarm center consist firstly of cables (3) comprising, in addition to Conductive electrical wires (30, 31), a multi-layer outer sheath namely two conductive layers (32, 33) separated by an insulating layer (34) and forming part of a circuit connected to the alarm center, and on the other hand, connected to said conductive electrical wires, plug-in connection means (4; 7) comprising means (68, 69; 93, 94) adapted to allow the closing of the circuit in the event of withdrawal.   6) Anti-theft alarm device according to claim 5, characterized in that the connection means comprise two plugs, a plug (5; 8) and a socket (6; 9), said socket (6; 9) having separate contacts (30, 31) and movable means (68, 69; 93, 94) for connecting said contacts (30, 31) when said socket (6; 9) is not coupled to said male plug (5; 8), which has pins (50, 51; 80, 81) which, on coupling, can move said movable means (68, 69; 93, 94) so as to breaking the connection between said contacts (30,31) and connecting to said contacts (30,31).   7) Anti-theft alarm device according to claim 5 or claim 6, characterized in that the conductive layers (32, 33) of the cables (3) are connected to the conductive electrical wires (30, 31) so that form only one circuit.