DOOR PROTECTION DEVICE.

The present invention relates to a security device for and more particularly to a protective device having a lock of the type of those comprising a deadbolt associated with a locking member, such as a groove, in order to provide movement transversely relative to the direction of translation of the bolt, to cooperate therewith, to lock it, the door being provided with, on its outer side, a counter plate protection, disposed substantially at said bolt and said locking member.

Such locks can in particular be a mortise or laying surface mountable on a door.

The backplates to which these locks are associated are primarily for the try to make impossible the burglar of these locks by drilling. A technique attack-doors, of which the door locks are not provided with such protective plates, consists, in effect, to pierce the door and the housing of the lock at said locking member and said deadbolt, to act on them directly, for disengaging said locking member of said bolt, and then moving it in translation.

However, such backplates do, often, that delay the tamper, as it is only necessary to disengage the burglar is backplates shielded doors on which they are mounted, to reach the bolt and the groove locks, via which was previously comprehended.

The present invention provides a protection device of the type mentioned above by which, when a burglar seeks to pluck a counter plate of the door on which it is mounted, it brings, simultaneously, disabling the lock, of which the locking member and the deadbolt fall then locked. In the present invention, this is accomplished via a locking member integral with the back plate, said locking member extending from said backing plate through the lock and having, on the catch side opposite to the back plate, a projection portion provided substantially at the locking member and the tail of the deadbolt. During the tearing of the counter plate, the projection deforms the entire locking device and optionally passes through it so that it may not be possible subsequently actuate the throat and the deadbolt, without at full cutting plates.

The present invention proposes a device for protecting a door separating the interior of a room from the outside and including a lock comprising a lock bolt movable in translation, said deadbolt accepting at least a position where it is projecting from the edge of the door to an unlocking position where it is substantially erased with respect to the said edge, said lock comprising a member for preventing also movable transversely to the direction of translation of said bolt and adapted to cooperate with teeth of said bolt for locking thereof, said locking member being associated with resilient means urging it towards said bolt, the door being equipped on its outwardly facing side of a counter-protecting plate disposed substantially at said bolt and said locking member, said lock being, further, provided with a wall juxtaposed to said bolt and said locking member, on the side thereof which is farthest from the counterplate protection, said device comprising a locking member integral with the back plate and comprising a body passing through said lock from said back plate to the aforesaid wall, said blocking member having, beyond the said wall, a projecting portion with respect to said body and directly opposite a portion of the aforesaid wall located at the locking member of the locking element and/or or their paths.

Advantageously, the portion of the locking member and the wall are spaced apart from one another; the body of the locking member passes through the wall with an opening therein, the projecting portion of said member being opposite a portion of said wall substantially surrounding said opening; the body of the locking member is a pin thread which cooperates with the internal thread of a fixing post secured to the counter plate protection.

Advantageously still, the blocking member is a screw, whose head is the protruding portion of said blocking member; the lock is recessed in the thickness of the door; the head of the screw which serves as a blocking member is disposed in the thickness of the door.

Preferentially, the wall is part of the trunk of the lock; the counter-protection plate is secured to the door by means of screws, whose thread cooperates with the inner thread fixing terminals integral with said backing plate, the head of the screw resting on the side of the door that faces inwardly; in a device wherein the lock has a barrel to provide its maneuvering, the locking member is a groove, which includes a lug adapted to cooperate with teeth of said bolt for locking thereof, said groove being intended to be lifted by the bit of the barrel, said catch cooperating with a notch of the bolt, to advance it in its direction of translation.

For understanding the invention, going in describe hereinafter, as purely illustrative and not limiting, one embodiment illustrated in the attached drawing.

Single Figure of the drawing is a view of a protection device in accordance with the invention, in a cross section in the thickness of the door, made in a plane parallel to the edge of the door through the axis of the lock cylinder.

See on the drawing that the protection device comprises a lock represented 1, which is a type lock mortise lock, [...] i.e. embedded in the thickness of a door such as will be understood, however, that the invention can be extended to other types of locks and, in particular, to locks mounted single point or multi-point applied.

This lock comprises a boot 2 1, commonly called escutcheon and disposed within the thickness of the P-gate, this box 2 being integrally fixed to a fixing plate (not shown) or face-plate disposed on the edge of the door. In the upper part of the box 2 is a part 3, generally called "follower", rotatably mounted about an axis perpendicular to the plane of the door e. this part 3 can be rotated by a shaft 4 of square cross-section, which is itself controlled by a handle (not shown) supporting leg.

This part 3 is provided with a substantially radially extending arm 5, the arm 5 being intended to actuate a latch bolt, of which it has been represented in Figure 6 the tail, this latch bolt having a portion protruding out of the lock 1 and passing through the face-plate thereof.

In the lower part of the enclosure 2 is mounted transversely to the plane of the door, a barrel 7 to profile cylinder, the cylinder 7 completely passing through the door P in its thickness. A key bit 8 integral with the rotor of the barrel 7 is rotatable in a plane parallel to that of the P-gate, its rotation being obtained by means of a key engaged in said barrel 7. above said barrel 7 is attached perpendicularly to the plane of the P-gate, between the two walls of the compartment 2, a terminal of the guide 9 cooperating with the tail 1Ø of a deadbolt, as well as with a groove 11.

Said terminal guide 9 is engaged in an oblong opening 12 formed in the tail 1Ø said lock bolt, said bolt being mounted in a plane parallel to the plane of the door P and being guided in translation in said plane, on the one hand by the opening of the faceplate that extends therethrough and, on the other hand, by said terminal tail guide 9.1Ø the bolt include, further, in its upper part, located above the oblong opening 12, two teeth 13 delimiting, with the tail body 1Ø of the bolt, three notches of deadbolt. In addition, the tail 1Ø dead bolt also has, in its lower part, located below the oblong opening 12, a tooth (not shown) defining with the head of the lock bolt and the tail body 1Ø, two detents adapted to cooperate with the bit 8 of the barrel.

The groove 11 is a plate movable transversely to the direction of translation of the bolt, in a plane parallel to that of the compartment and the door 2 on this plate P is provided an oblong slot 14 substantially perpendicular to the elongated opening 12 of the shank 1Ø of the deadbolt, the terminal guide 9 through said groove 11 in said oblong slot 14.

This groove 11 serves as a locking member 15 and includes a leg projecting perpendicularly to the plane of said groove 11 and adapted to cooperate with the notches of the upper deadbolt delimited by the teeth 13, to block it. Further, this groove 11 cooperates, towards its end furthest from the barrel 7, with a return spring urging the R 11 said groove toward said barrel 7, and thus the tab 15 towards the notches that delimit the teeth 13, so that said groove 11 said deadbolt locks.

This lock 1 is, further, associated with a back cover plate 16 disposed on the P-gate side thereof where it is desired to achieve enhanced safety, this counter plate 16 is disposed substantially opposite the entire trunk 2. this counter plate 16 is secured to the door P via three or four screws 17 whose rods 17has each have a thread which cooperates with the inner thread fixing terminals 18 welded on said back plate 16, the heads 17b. of these screws 17 resting on a plate 2Ø mounted on the P-gate, on the side of said P-gate opposite said counter plate 16. These terminals 18 and the rods 17has pass through the P-gate 19 in cylindrical housings provided in the door for this purpose.

Further, the protective device includes other elements external protection, and in particular a cover 21 which is a protective steel roller, drill resistant and impact, and that is mounted on the portion of the barrel 7 which is protruding from the P-gate on the side of the counter plate 16. This protector 21 is arranged in a housing of the counter plate 16 substantially conforming in its cross section and is associated with a support 22, which is a contact piece between said hood and 21, both, the door P and the barrel 7, as well as a protective washer 23 steel substantially surrounding the edge of the rotor of the barrel 7, while leaving free access to the key receptacle of said rotor, said protective washer being resistant to drilling.

At the middle portion of the lock 1, the door P is crossed in its thickness by a cylindrical housing 24 which receives a screw whose shank 25 25has includes a thread cooperating with the inner thread of a terminal 26 welded, in the same way as the terminals 18, on the backing plate 16. The rod 25has extends through the case 2 substantially just between the movable part 3 and the portion of the groove 11 furthest from the cylinder head 25 7.b. said screw 25 is located in the housing 24, in the thickness of the door, the end of the box 2 opposite to the counter plate 16, the flat portion of this head 25b. being directly opposite and parallel to the portion of the casing wall 2 which is referred to by 2has and which is furthest away from the counter plate 16, said flat portion being substantially flush with the edge of the part 6 and the trajectory of the groove 11. This head 25b. is more particularly in line with said groove 11 when the latter is in its position farthest from the cylinder head 25 7.b. and the wall 2has 2 trunk which is directly opposite are spaced from each other by a distance substantially corresponding to the thickness of said head 25b..

Further, the plate 2Ø has a circular opening 27 which is both traversed by the square pin 4 which is in front of the head 25b. of the screw 25. This plate 2Ø also includes, in addition to the openings necessary for the passage of screws 17, an opening 28 which is engaged by the portion 7 of the barrel protruding from the part P on the side of said plate 2&sl0 ;.

The mounting of such a lock occurs as that will now be described. Subsequent to formation in the thickness of the P-gate the mortise necessary to accommodate the trunk 2, and after having pierced the seats required to pass the cylinder barrel 7 and of the shaft 4, and the keepers 19 and 24, is installed the various elements of the lock 1 (box 2, barrel 7, square pin 4, forend, andc...). In a second step, after the barrel 7 disposed on the protective washer 23, the carrier 22 and the cover 21, is mounted on the outer side of the P-gate the counter plate 16, the rods 17has threadedly engageable with the inner thread of terminals 18, their heads 17b. bearing on the holding plate 2Ø disposed on the inside of the door P through the opening 27, just then engage the rod 25has in the terminal 26, until its head 25b. lies approximately at the level of the thickness of the P-gate, in the housing 24.

During an attempted break such a P-gate, the lock 1 being closed, for example to two turns, a first generally involves searching for stripping off the protective backing plate 16 for subsequent piercing the door. After shearing or tearing of one or more holding elements that constitute the terminals 18 and the screws 17 associated therewith, it is possible to flipping the counter plate 16 protection. At this point, the head 25b. the screw 25 is still far enough from the wall 2has the box 2 for no resistance to tearing of the counter plate 16.

In a second step, the operator does not smelling any resistance, will, therefore, tend to look to pluck at once said counterplate 16 protection, by exerting on it a large force using, for example, an outer tool such as a leverage bar. The screw 25 driven by the counter plate 16 through the boot 2, will depress and deform the wall 2has 2. after deformation of said casing, a portion of the wall 2has lies substantially at the path of the groove 11 and more specifically the upper position that said groove 11 admit previously, when the tab 15 was disengaged from the tail 1Ø dead bolt, which prohibits any movement of said groove 11, whose tab 15 remains engaged in the notches of the lock bolt, which is then impossible to maneuver.