EP0947651A1 - Lock fitting of the espagnolette type for a door, a window, or similar - Google Patents

Abstract

The lock fitting consists of long bolts and an actuating mechanism with at least one toothed sprocket (6) engaging with a rack (7) connected to a bolt. The rack teeth are spaced to ensure a clearance (15) from the sprocket teeth so that a force applied to the rack or the connecting piece between the rack and bolt will cause the rack to press against a thrust surface (18) on the tip (17) of a tooth.

Description

The invention relates to a locking fitting for a door, window or the like, of the cremone bolt or cremone bolt type, comprising a control mechanism provided with at least one wheel toothed engagement with a defined rack, either by a series of openings interspersed with steps, either by a toothing, and associated, directly or through a suitable transmission member, at least one rod operation to bring the latter into the locking position or unlocking by the action of a button or a handle control and / or a key element, provided capable of acting, directly or indirectly, on said toothed wheel.

The present invention will find its application in the field of the building hardware and concerns, more especially the locking fittings of the lever type or lock-bolt.

In this regard, it will be observed that such cremones or cremones-locks are distinguished in that they comprise at least one operating rod extending above and / or below a box closing the control mechanism capable of bringing these operating rods in a locked position and unlocking. In fact, these operating rods, according to the cases, are fitted or act on locking devices which are able to cooperate with strikes.

We understand, of course, that if we take no other precaution it is easy to repel such a rod maneuver from its locked position in its position unlocked by direct action on said organs of lock on which it acts. As a result, a opening, door or window type, fitted with a lever, such that it has just been described, offers little resistance to attempted break-in.

It is true that locks and bolts are also known which, through a key element, usually allow to act on a deadbolt so that after unlocking an individual maneuvering rods, seeking to enter through breaking into a home, must, moreover, to fracture the key element to obtain complete unlocking of opening it. Anyway, a point opening single locking is often more fragile to such attempted break-in compared to a point opening multiple locks.

To remedy the above problem, namely to avoid that under the action of a thrust exerted through an organ of locking on the operating rod it is possible to make the locking points that it provides inoperative, we have already imagined several solutions that are, in reality, relatively complex. At least such locking devices for operating rods in position locking, usually lead to an increase in number of parts making up the control mechanism of these bolts or bolts.

Also, if it is customary to equip such blocking devices lock bolts, simple bolts are, generally lacking. This is mainly explained by the fact that this locking of the operating rods in the position of locking can intervene, precisely, only once these fully locked operating rods. Also, the command of the key element which frequently completes the action locking as part of a lock-bolt turns out perfectly suited to fulfill the above function.

In contrast, in the case of a cremone bolt, a fast handling and just as simple as its design. Also, it was a question of finding a solution that would allow locking the operating rods once locked through the only manipulation carried out to bring these rods from their unlocked position in locking position, this does not result in an increase in the number of parts making up such cremone bolt.

Ultimately, the inventive approach of this invention was to develop a mechanism cremone bolt or bolt lock which is irreversible without this having increased, whatever the order, resistance to maneuver provided by the control mechanism. Indeed, it took avoid the resistance felt by the user at a handle or button, is no more important than usually.

Ultimately, the present invention has been able to respond to the problem described above, while respecting the requirements to which it has just been referred to.

To this end, the invention relates to a locking fitting for door, window or the like, of the cremone bolt or locking bolt type, comprising a control mechanism provided with at least a toothed wheel engaged with a defined rack, either by a series of openings interspersed with steps, either by a toothing, and associated, directly or through a suitable transmission member, at least one rod operation to bring the latter into the locking position or unlocking by the action of a button or a handle control and / or a key element, provided capable of acting, directly or indirectly, on said gear, characterized by the fact that the rung spacing or still teeth of said rack is determined for authorize an empty run of the latter relative to the or the teeth of the gear on which it comes to mesh, the top of these teeth of said gear being provided capable of defining a bearing surface against which is able to come up against, through said race to empty, a rung or a tooth of the rack, following a thrust exerted from the operating rod on said control mechanism.

In the end, we will notice that to achieve the goal sought, the present invention did not result a substantial modification of the component parts a cremone bolt or bolt-lock control mechanism. Indeed, for the implementation of this invention, it was sufficient only of an adaptation of these elements which has resulted, essentially, by increasing the clearance between a rack and a gear.

In this regard, it will be noted that the present invention has known go against a usual approach in the context of the design of locking fittings. More particularly, so far we have constantly sought a reduction in functional clearances so as to obtain a certain precision in the amplitudes of displacement of moving elements.

In fact, as will emerge from the description which follows follow, this additional game resulting from the implementation of the invention does not affect, in any way, the quality of the operation of the control mechanism of such a lever or lock-bolt.

Ultimately, the present invention allows the design of bolts or bolts that can be described as security for a cost strictly identical to a bolt
or conventional bolt lock, having no means of immobilizing in translation their operating rod, once it in the locked position.

Other objects and advantages of the present invention will appear during the description which follows relating to an embodiment given by way of example indicative and not limiting.

• la figure 1 illustre, de manière schématisée, un temple de crémone conforme à l'invention ;
• la figure 2 est une vue de détail de la figure 1 permettant de mieux visualiser la course à vide d'une crémaillère associée à une tringle de manoeuvre par rapport à une roue dentée, les éléments du mécanisme de commande de cette crémone étant illustrés, ici, en position de verrouillage.

The understanding of this description will be facilitated by referring to the attached drawings in which:

• Figure 1 illustrates, schematically, a cremone temple according to the invention;
• Figure 2 is a detail view of Figure 1 to better visualize the idle stroke of a rack associated with an operating rod relative to a toothed wheel, the elements of the control mechanism of this lever being illustrated, here , in the locked position.

As illustrated in Figures 1 and 2 of the accompanying drawings, the present invention relates to the field of fittings of lock for door, window or the like, more particularly that of cremones or cremones-locks.

Thus, as an example of application of this invention, there is shown in these Figures 1 and 2 a cremone bolt 1 comprising two operating rods 4, 5 extend, respectively, above and below a central box 3 and to which the control mechanism 2 of this cremone bolt 1 is able to communicate movements in opposition.

It is obvious that the present invention will also find its application in the context of bolts or bolts-locks does not comprising only one operating rod or else operating rods moving systematically in a same direction during locking and unlocking phase.

Anyway and as it emerges from this mode of embodiment illustrated in the drawings, such a mechanism gear lever 2 or gear lock 1 is provided with minus a toothed wheel 6 engaged with a rack 7 which can be directly associated with an operating rod 4 knowing that this rack could also equip a suitable intermediate transmission device, moreover connected to this operating rod 4.

In addition, such a rack 7 can be defined, either by a toothing, either by a series of openings 8, interspersed steps 9, arranged at the level of this operating rod 4 or any other intermediate transmission member.

The toothed wheel 6 is none other, here, that the follower on which is able to act the user using a handle or a control button. Also, this toothed wheel 6 or follower has, in its center, a housing 10 for receiving the square of operation of such a handle or control button.

Ultimately, to fully understand the purpose of this invention, it should be observed that such a toothed wheel 6 does not does not necessarily constitute a follower directly maneuverable, by the user. It suffices, in fact, that this wheel toothed 6 acts on the control mechanism 2 of the cremone bolt or bolt lock 1 so that it ensures the drive of said operating rod 4 from the moment the user controls the locking or unlocking of this cremone bolt or bolt lock, whatever, at the end of account, using a command handle or a key item.

In short, user intervention can be passed on directly or indirectly on this gear 6.

Returning to the particular embodiment illustrated in the drawings, the cremone bolt 1 comprises, in this case, a second toothed wheel which is in fact a reverse gear 11 suitable to retransmit the movement communicated to the rod of maneuver 4 to the second operating rod 5 by conferring on the latter a displacement in a direction opposite to the former. Also, these operating rods 4, 5 come mesh with racks 12, 13 and so diametrically opposite on this reversing pinion 11.

Anyway, according to a particular characteristic of the present invention, the spacing 14, as the case may be, between the rungs 9 or the teeth defining the rack 7 cooperating with the gear 6, is determined to authorize a stroke vacuum 15 of this rack 7 of the operating rod 4 relative to the tooth or teeth 16 of this toothed wheel 6, on which one or which it comes to mesh. In addition, the vertex 17 of these teeth 16 corresponding to said toothed wheel 6 is provided capable of defining a bearing surface 18 against which is able to come up against abutment, following a displacement of said rack 7 over a length corresponding to the idle stroke 15, a step 9 or a tooth of this rack 7. A note that this displacement of the latter is comparable to a push that comes from a rod operation 4, 5 on said control mechanism 2 in a unlocking direction, this during an attempt breaking the door or window fitted with this lever or lock-bolt 1.

In fact, the desired result is particularly visible in Figure 2 where we see, clearly, that under the impulse of a push, symbolized by the arrow 19, the rack 7 so the operating rod 4 through its relative mobility relative to the toothed wheel 6, abuts, at its level 9a, on this support surface 18 that defines the apex 17 of a 16a of the teeth 16 of the toothed wheel 6. Also, this thrust is reflected, at the level of this step 9a of the rack 7, by a reactive force f 20 extending, substantially, in a radial direction relative to this toothed wheel 6.

In the end, the thrust corresponding to arrow 19 does not can be exerted on the side of the teeth 16 of the toothed wheel 6, it cannot be subjected to a couple who would have tendency to unlock the cremone bolt or bolt lock 1.

It is obvious that in an embodiment as illustrated in the figures corresponding to a cremone bolt or cremone bolt provided with operating rods 4, 5 with displacement in opposition, the connection of these operating rods through of the reverse gear 11 leads to the same blocking situation of these operating rods 4, 5 that the thrust is exerted on one and / or the other of them.

Finally, it will be noted that the no-load race 15 through of which the control mechanism 2 of a lever or cremone bolt 1, according to the invention is made irreversible, does not cause, contrary to what one could think, no harmful side effects, which goes against prejudices in this area where it is usually sought solutions to reduce the game as much as possible functional of a control mechanism.

By having been able to respond effectively and simply to the problem posed, the present invention should be considered as representing a clear progress in this field of fittings of lock for door, window or the like.

Claims (1)

Lock fitting for door, window or the like type cremone bolt or cremone bolt (1), comprising a locking mechanism control (2) provided with at least one gear (6) in engagement with a rack (7) defined, either by a series openings (8) intersected by steps (9, 9a), either by a toothing, and associated, directly or through a suitable transmission member, at least one rod operation (4) to bring the latter into the locking position or unlocking by button or handle control and / or a key element provided capable of acting directly or indirectly on said toothed wheel (6), characterized in that the spacing (14) of the steps (9) or teeth of said rack (7) is determined to authorize an empty run (15) of the latter by relative to the tooth (s) (16) of the toothed wheel (6) and on which one or which it meshes, the top (7) of these teeth (16, 16a) of said toothed wheel (6) being provided capable to define a bearing surface (18) against which is in able to come into abutment, through said idle stroke (15), a rung (9a) or even a tooth of the rack (7), following a push from the operating rod (4) on said control mechanism (2).

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