EP0745745B1 - Protection device for casing, holding a lock operating mechanism having a key - Google Patents

Abstract

The lock casing (2), containing a key-operated mechanism and located within the door panel (6), is fitted between two outer trim plates (9, 10) on the outside (7) and inside (8) of the door and incorporates an anti-drilling plate (11) on the outside of the casing, fixed it by screws (14) and made with a holes for the key. The anti-drilling plate is fitted directly to the outer surface of the lock casing and is fixed to the inner surface (17) of a security housing (18) recessed into the outside of the door panel and lying flush with the door panel's outer surface so that it fits behind the outer trim plate. The security housing is held in place by inner threaded bushes (16) engaging with the fixing screws (14).

Description

The invention relates to a protective device for a housing. used to house a control mechanism for a fitting locking recessed in an opening and comprising an element to key, barrel type, extending through cleanliness plates arranged on the internal and external side of the opening, this device comprising at least one anti-drilling plate arranged on the side external to the housing and made integral with the opening to using fasteners accessible from the internal side of this last, this anti-drilling plate further comprising a opening adjusted to the passage of the key element.

The present invention will find its application in the field of the building hardware.

There are already known protective devices corresponding to the previous description. In particular, as part of a locking fitting, of the lock, cremone bolt or analogous, embedded in the edge of an opening corresponding to a door, window or the like, said fitting comprises a housing serving as a housing for a control mechanism comprising, in particular, a key element of the barrel type. So it has already been contemplated protecting said case from the actions of a haddock seeking to enter unauthorized manner into any premises. Indeed, such a fitting case of locking, if not reinforced by adequate means, hardly resists drilling, for example, or deformation at the instigation of a lever or following an extraction attempt barrel, in particular.

The solutions implemented so far have consisted of either reinforce the elements of the control mechanism and the housing in modifying them, or protecting said case by working on, at minus, the surface mounted cleanliness plate of the opening. The latter solution is, for example, implemented works in the locking fitting as described in the document DE-A-3.604.719.

In particular, the specific cleanliness plate includes, on its side applied on the opening, an anti-drilling plate, or even performs the functions of the latter. She also receives threaded sockets made of a material specific for receiving fasteners such as screws crossing right through the opening, some to reach the internal cleanliness plate or treat it for him allow this role to be played.

Finally, the external cleanliness plate has specific characteristics (thickness, housing for reception a frame for the key element, etc ...) allowing it avoid direct actions on this key element.

We also know, from document Fr-A-2,613,750, a device of anti-drilling protection of a cylinder lock comprising several elements resistant to drilling, namely a front badge armored with a metal jacket under its inner side comprising an opening for the passage of the barrel knowing that the escutcheon only has a hole intended to coincide with the front face of the rotor of said barrel. In addition, this device has a lining plate positioned on the side inside of the door wall delimiting, externally, the housing receiving the lock. So this dubbing plate comes applied on the outer side of the lock housing. She also has a through annular collar, apart, the opening machined in this outer wall of the door. AT the very inside of this annular collar penetrates the shirt metal fitted to the front badge. As a hubcap or rosette, the assembly receives a conical ferrule, external side, mounted crazy around the metallic shirt corresponding to the badge before.

We can see that such prior protective devices use specific cleaning plates which, for example therefore, present an aesthetic that only matches very rarely with all the cleanliness plates corresponding to other openings of a dwelling. Furthermore, one cannot reasonably consider designing, for each model of existing cleanliness plate, cleanliness plates similar and comprising a protection device as described previously.

In addition, problems arise for adaptation after the fact, a protective device. Indeed, in this case the user is obliged to replace, purely and simply, the existing cleanliness plates.

As already indicated above, in parallel with these protection associated with cleanliness plates, there are those questioning the configuration of the case and / or the mechanism of the locking fitting itself. Such protection device is notably described in document FR-A-2.708.025. In particular, this document describes a certain number of ways to strengthen the establishment of the key element inside said housing. Aside from the downside principal which arises from this protective device, namely the total overhaul of the locking fitting itself, other disadvantages arise from such a design, in particular for the reinforcement, after the fact, of a locking fitting, it replace the housing plus mechanism assembly control.

The solution according to the invention proposes to remedy the whole of the aforementioned drawbacks, this through a device for protection which, while joining, from the point of view of efficiency, existing devices, avoids any modification the housing or the control mechanism of the locking fitting and allows the reuse of the plates usual cleanliness, with a simple resumption of machining.

The invention as characterized in the claims, solves the problem and consists of a protective device for housing for housing a mechanism for controlling a fitting locking device embedded in a leaf and comprising an element key, barrel type, extending through cleanliness plates arranged on the internal and external side of the opening, this device comprising at least one anti-drilling plate arranged on the external side of the case and made integral with the opening by means of attachment accessible from the inner side of the latter, this plate anti-drilling further comprising an opening adjusted to the passage of the key element, characterized in that said anti-drilling plate external is applied directly on the external side of the housing and is made integral with the internal face of a body of protection inserted in a machined housing on the external side of opening it so as to communicate with a notch practiced in the song of said opening and welcoming the case, this such so that the outer side of the protective body comes position flush with the outer side of the sash so that retract to the rear of the external cleanliness plate and comprising a protective cap enveloping the barrel in its part coming to extend through the external cleanliness plate, this comprising an opening adjusted to the section of the endpiece protection.

• la figure 1 représente une vue schématisée, en élévation et en coupe du dispositif de protection selon l'invention
• la figure 2 représente une vue schématisée et de gauche de la figure 1 ;
• la figure 3 représente une vue schématisée et en plan d'un élément à clé du type barillet ;
• la figure 4 est une vue de gauche de la figure 3.

The invention is set out in more detail in the description which follows, accompanied by drawings corresponding only to an exemplary embodiment.

• Figure 1 shows a schematic view, in elevation and in section of the protection device according to the invention
• Figure 2 shows a schematic left view of Figure 1;
• FIG. 3 represents a schematic plan view of a key element of the barrel type;
• Figure 4 is a left view of Figure 3.

The present invention relates to a protection device 1, more particularly visible in Figures 1 and 2 of the attached drawing, having the function, precisely, of protecting a case 2 accommodating the control mechanism 3 corresponding to a fitting locking device 4, of the lock, lever-lock or similar type comprising a key element 5.

In fact, the protection device 1 according to the invention has for purpose of protecting the housing 2 from a locking fitting 4 which is embedded in the thickness of an opening 6 corresponding to a door, for example.

It should be observed that in such an arrangement we find, in in addition, on the external side 7, but also, in the usual way, internal side 8 of this opening 6, cleanliness plates, respectively 9, 10, through which extends, in particular, the key element 5. On such cleanliness plates 9, 10 are still mounted, usually, the handles allowing to act on the locking fitting control mechanism.

As for the protection device 1 it includes an anti-drilling plate 11 disposed on the outer side 12 relative to the housing 2 and having an opening 13 adjusted to the passage of the key element 5. This anti-drilling plate 11 is made integral with the opening 6 by means of fasteners 14 of the screw type accessible from the side internal 8 to sash 6.

Therefore, these fasteners 14 such as screws cross, right through the opening 6 and, therefore, the housing 2 of so as to cooperate, at their end 15 with said anti-drilling plate 11.

In this regard, it receives threaded sockets 16 in which are fixed these screws constituting said organs of fixing 14. Note that with regard to these threaded sockets 16, they can, here again, be made of a material respecting certain qualities of resistance, such as hardness and another, avoiding their degradation under the actions of a shark.

In fact, according to the invention, said external anti-drilling plate 11 is applied directly on the external side 12 of the housing 2. It is, moreover, made integral with the internal face 17 of a protective body 18 which is inserted into a housing 19, with adapted dimensions, machined on the external side 7 of the opening 6. In thus being positioned in a milling made in the opening 6, itself, the protective body 18, to which is made integral the anti-drilling plate 11 can easily be retracted to the rear of a cleanliness plate 9 in the usual configurations. Indeed, the external side 20 of this protective body 18 can, thus, come to position, substantially, flush with the side outer 7 of the opening 6.

Note that this protective body 18 can receive, so integral, said threaded sockets 16 intended to cooperate with the fixing members 14 in order to ensure the fixing of the opening 11 anti-drilling plate 6.

The housing 19 housing the protective body 18 is machined in opening it 6 so as to communicate with the notching 21 practiced in the song of this opening 6 and welcoming the case 2 of the locking fitting 4, allowing, precisely, to the plate 11 anti-drilling to come directly on the side external 12 of the housing 2.

Preferably, this protective body 18 comprises a tip of protection 22 enveloping the key element 5 in its part extending through the external cleanliness plate 9. At this About, in the latter, it is machined an opening 23 adjusted to the section of the protective cap 22. In addition, the external face 24 of the latter is located, preferably flush with the end 26 of said key element 5 (see FIG. 3).

Usually, a key element 5 of the barrel type is immobilized inside the housing 2 of the locking fitting 4 by means of a fixing screw 27 introduced from the edge before 28 of the opening 6 and coming to cooperate with a threaded orifice 29 present at this key element 5.

For a security gain towards an attempt to extract this key element 5, this is also crossed, in some case, by a pin 30 projecting from both sides other of said key element 5. In fact, this pin 30 is located at the part 31 of this key element 5 oriented on the side of the opening 6. Thus, it is provided, according to the invention, to give the anti-drilling plate 11 a camber 32 on the part and other of the opening 13, these bends 32 being located in the same horizontal plane than that of pin 30 associated with the element to key 5. In such a way, the projecting ends of said pin 30 are positioned at the level of these camberings 32 on the internal side of the anti-drilling plate 11, which can thus contribute effectively to maintaining the key element in the case 2 in the event of an extraction attempt.

According to a preferred embodiment, the device protection 1 also includes an anti-drilling plate 33 disposed on the inner side of the housing 2. In reality, this plate anti-drilling 33 is applied on the internal side 8 of the opening 6, at the rear of the internal cleanliness plate 10. By therefore, it has an opening 34 allowing the passage of the key element 5. Likewise, other openings 35 are fitted at the level of this anti-drilling plate 33 used for passage of the screws constituting the fixing members 14.

In view of the above description, it can be seen that the protection device 1 according to the invention can not only be mounted, from the outset, on an opening fitted with a fitting of locking of the lever type-lock, lock or the like, but it is also possible to add it later, without much modification, that is to say without calling into question the existing. In effect, it suffices, for this, to slightly cut the external side opening and milling, at the level of the cleanliness plate external, an opening allowing the passage of the nozzle of protection 22. In particular, this protection device 1 can be used with almost any type of cleanliness plate external 9 which has advantages, not only economic, but also from an aesthetic point of view.

Claims (6)

1. Locking fitting (4) designed so as to be capable of being inserted into a cutout (21) of a leaf (6) of a door, window or the like, including, on the one hand, a casing (2) for holding a control mechanism (3) provided with a key element (5), such as a cylinder, capable of extending through face-plates (9, 10) designed so as to be capable of being arranged on the inner (8) and the outer side (7) of said leaf (6) and, on the other hand, a protection device (1) including at least one drill-proof plate (11) arranged on the outer side (12) of the casing (2) and designed so as to be capable of co-operating with fixing organs (14) passing through this casing (2), said drill-proof plate (11) including, in addition, an opening (13) adapted to the passageway of the key member (5), characterised in that said drill-proof plate (11) is applied directly onto the outer side (12) of the casing (2) and is made integral with the inner side (12) of a protection body (18) capable of being retracted behind a face-plate (9) and including a protection tip (22) capable of surrounding the key member (5) at its portion extending through the outer face-plate (9), the latter including an opening (23) adapted to the cross-section of the protection tip (22).
2. Locking fitting according to claim 1, characterised in that the protection body (18) receives, made integral, tapped sockets (16) aimed at co-operating with the fixing organs (14), such as screws.
3. Locking fitting according to any of the preceding claims, characterised in that the protection tip (22) includes an outer face (24) located flush with the end (26) of the key member (5).
4. Locking fitting according to any of the preceding claims, characterised in that the drill-proof plate (11) includes a cambering (32) on both sides of the opening (13), these camberings (32) being located on one and the same horizontal plane as a pin (30) passing through the key member (5) and the protruding ends of which, on both sides of the latter, are positioned at the level of said camberings (32) on the inner side of the drill-proof plate (11).
5. Locking fitting according to any of the preceding claims, characterised in that it includes a drill-proof plate (33) arranged on the inner side of the casing (2).
6. Locking fitting according to claim 5, characterised in that the drill-proof plate (33), designed so as to be capable of being applied against the inner side of the leaf (6), behind the inner face-plate (10), includes, on the one hand, an opening (34) allowing the passing-through of the key member (5) and, on the other hand, further openings (35) for the passing-through of the fixing organs (14).

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