FR2795119A1 - LOCKING HARDWARE PROVIDED WITH AN AUTOMATICALLY RETURN LOCKING MEMBER IN LOCKING POSITION AND LOCKING MEMBER, PARTICULARLY HALF PENE, FOR SUCH A HARDWARE - Google Patents

Abstract

Lock fitting comprises metal head (9) molded onto bolt shank. Side (10) defines ramp (11) for drawing back control of bolt in its unlocked position against spring under impulse of strike plate. Shank is covered by insert (12) made of synthetic material which absorbs noise of bolt clashing with strike plate. Insert is installed on end of bolt before molding on metal shank. An Independent claim is also included for the manufacturing method of half-turn bolt.

Description

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  The invention relates to a locking fitting, of the lock, cremone bolt or similar type, comprising at least one locking member, such as a latch bolt, which, under the action of automatic return means in locking or semi-locking position, comprises a metal active part provided capable of cooperating with a keeper. The invention also relates to such an automatic return locking member in the locked or semi-locked position. Finally, the invention relates to a half-turn bolt for locking fitting, of the lock or cremone-lock type, comprising a metal head, one side of which defines a ramp for controlling its reversing in the unlocked position, against the action elastic return means and under the impulse of a keeper provided capable of

to welcome the aforesaid latch bolt.

  The present invention will find its application in the field

of the building hardware.

  Many locking fittings, of the lock, lever-lock or similar type, are provided, among other things, with a latch bolt which is self-restoring in the

  locking, this under the impulse of elastic return means.

  In this position this latch bolt is provided capable of cooperating with a keeper to maintain a door leaf or the like in

  position closed on its sleeping frame.

  More specifically, a control member, in particular, a control handle makes it possible, when opening this door, to ensure the retraction of this latch bolt in a retracted position inside a housing and, therefore, released from the keeper in which it was previously introduced. Then, once the door is open and the action on said control handle is released, this latch bolt returns via the return means

  elastic, its initial position, protruding, locking.

  Conversely, when the opening is closed, the user has the possibility, via this same control handle, of ensuring, once again, the retraction of this latch bolt so as not to release the action on this handle that once the opening is closed,

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  that is to say in a position such that this latch bolt can come freely into the corresponding strike

arranged on the sleeping frame.

  However, such a latch bolt has a head, one side of which is biased so as to define a ramp which, when it comes into contact with the strike on the frame, automatically causes it to retreat against the action of the return means elastic. Then, when this latch bolt head is in line with the opening provided to receive it in the keeper, it is automatically pushed back into the keeper in the locked position. Consequently, by slamming the opening against the sleeping frame to close the door, it is ensured to be kept closed thanks to the particularities of the operation of said

turn around.

  However, such a door slam, whether voluntary or involuntary, causes a certain noise which, at times, can be amplified through poorly soundproofed premises. However, a large part of this door slamming noise results from the shock of the

  head of the latch bolt, metal type against the strike itself

  even often designed in metallic material.

  In this field of locking fittings, there are many other locking members than a latch bolt, the return of which to the locking position takes place automatically under the action of appropriate control means. In most cases, this return to the locking position is effected with force to guarantee the engagement of this or these locking members in the corresponding strike (s), this to overcome the resistance to this maneuver. However, it is only very rarely that such a locking member is located strictly in line with the opening in the keeper and does not strike any of the walls thereof at the time.

  o it is violently pushed back by said control means.

  Also, we understand that, again, the operation generates an annoying noise.

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  The present invention is therefore intended to be able to

answer this problem.

  To this end, the invention relates to a locking fitting, of the lock, cremone-lock or similar type, comprising at least one locking member, such as a latch bolt, which, under the action of return means automatic in the locked or semi-locked position, has a metal active part provided capable of cooperating with a keeper, characterized in that the metal active part is provided with an insert on at least one of its sides capable of entering in contact with the keeper, this insert being defined in a material, in particular synthetic material, capable of damping, at least in part, the noise of a

  collision of said active part with said strike.

  The invention also relates to an automatic return locking member in the locked or semi-locked position for a lock fitting of the lock, cremone-lock or similar type, comprising a metal active part provided capable of cooperating with a keeper, characterized by the the fact that said metallic active part is furnished with an insert on at least one of its sides capable of coming into contact with the keeper, this insert being defined in a material, in particular synthetic, capable of attenuating at least partially, the noise a collision of said part

active with said strike.

  Finally, the invention relates to a latch bolt for locking fitting, of the lock, cremone-lock or similar type, comprising a metal head, one side of which defines a ramp for controlling its reversal, in the unlocked position, against the action of elastic return means and under the impulse of a keeper provided capable of accommodating said latch bolt, characterized in that the head of the latter is lined, on its side defining said ramp, with an insert of a material, in particular synthetic material, defined capable of damping, at least in part, the noise of a possible collision of said bolt with said strike.

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  The object of the present invention will be better understood in view of

  the following detailed description relating to examples

  of realization given as an indication and not limiting.

  Understanding this description will be facilitated by

  referring to the attached drawing, in which: - Figure 1 illustrates, schematically, a door whose opening is equipped with a locking fitting provided with a latch bolt intended to cooperate with a keeper at the level the sleeping frame; - Figure 2 is a schematic perspective representation of the latch bolt and in particular of its head; - Figure 3 is a schematic sectional view of the head of the latch bolt in accordance with an exemplary embodiment; - Figure 4 is a schematic representation in elevation of a latch bolt, according to a second embodiment; - Figure 5 is a schematic view from below of the

figure 4.

  As visible in the figures of the attached drawing, the present invention relates to the field of locking fittings

  of the lock, lever-lock or similar type.

  In fact, it is concerned with a locking fitting 1 comprising at least one locking member with automatic return in the locked or semi-locked position, this under the impulse of suitable control means, such as elastic return means. . In this locking or semi-locking position, this locking member comprises a part

  active, metallic, designed to even cooperate with a strike.

  The following description, as well as the figures in the drawing

  attached, relate to such a locking member in the form of a latch bolt 2 with elastic return in the locking or semi-locking position. Such a latch bolt 2 is capable of being actuated by means of a control member, in particular a handle

  3, or even a key element 4.

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  Thus, there is shown, as an example in Figure 1, a door whose opening 5 receives such a locking fitting 1 in the form of a lock. More particularly, it is visible at the height of the front edge 6 of this opening 5 the latch bolt 2 which, in a natural position of rest, is protruding due to the elastic return means (not

  represented) to which it is subject.

  This U-bolt 2 is brought to cooperate, in the closed position of the door, with a keeper 7 located at the level of the

sleeping frame 8.

  Note, in this regard, that the U-bolt 2 comprises a head 9, one side 10 of which, oriented in the direction of the fixed frame 8, defines a ramp 11 which makes it possible to control the reversal of this U-bolt 2, in its unlocked position, against the action of the elastic return means, this under the impulse of said keeper 7, when closing the door without intervention by the user on any of the organs 3, 4. Insofar as the head 9 of this latch bolt 2, like the keeper 7 at the level of the frame 8, are usually made of metallic material, their meeting produces a

annoying knocking noise.

  Also, to remedy this problem, this head 9, made of metallic material, of the latch bolt 2 is furnished, at least on its side 10 defining the ramp 11, with an insert 12 made of a material, in particular of synthetic type, defined able to amortize, at least in

  part, this noise resulting from the collision of said half bolt

turn 2 with said strike 7.

  As shown in Figures 2 and 3, to ensure the function assigned to it, this insert 12 is slightly protruding at the level of the ramp 11. If necessary, it can still extend at the edge before 13 of this head 9 of the latch bolt 2 so that, until engagement with the keeper 7, this head 9 is in contact with the latter at

through its insert 12.

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  It should be observed that this insert 12 can be brought to cooperate with the head 9 of the latch bolt 2 by means of mechanical type connecting means. In particular, at the level of the ramp 11 can be formed a groove 14 in the form, for example, of a dovetail, in which is then engaged this insert 12, configured for this purpose. Note that this engagement can be made by force, just as the insert 12 can be glued in this groove 14. Insofar as the head 9 of such a latch bolt 2 is currently designed through a metal material molding process, the implantation at this head 9 of the insert 12 may result from an overmolding process. More particularly, this insert 12, made of synthetic material, can be predisposed in the mold into which the metallic material is then injected.

  fusion for the molding of this head 9.

  It will be noted in this connection and as visible in Figures 4 and 5 of the accompanying drawing, that a latch bolt 2 comprises, not only, a head 9, but also a tail 15 provided able to extend in the housing of the locking fitting 1, on this shank 15 acting, in particular, the control members such as the handle 3 or even the key element 4 by means of an appropriate control mechanism. In fact, it is very common for the head 9 to be molded onto the tail 15 which, therefore, is also in the form of an insert in the injection mold. Also, on the end 16 of this tail 15, can be mounted the insert 12 capable of extending, after molding, at least at

ramp level 11.

  As already indicated above, such an insert 12 can, not only extend along this ramp 11, but also at the level of the front edge 13 of the head 9, or even on the opposite side 17

to said ramp 11.

  In sum and as visible in FIG. 4, this insert 12 can take, in section, the shape of the head 9 while being slightly greater than the latter so as to be able to play its role of noise damper by coming into contact , first,

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  with the strike 7. It will be noted, however, the presence of a recess 18 in the central part of this insert 12 so as to allow the flow, on either side of the latter, of the molten metallic material during the molding of the metal head 9. In this regard, it will be observed that this process of overmolding a metallic material at high melting temperature on a plastic insert whose melting or degradation temperature is much lower seems to a priori difficult or even impossible to implement. However, it turns out, on the one hand, that through a very rapid injection into the mold of the molten metallic material, injection which can be followed, instantly, by the cooling of the mold and, on the other hand, due to the generally reduced thermal conductivity of a synthetic material, from which results a certain inertia in raising the temperature of the latter, we have been able to master this process of

  overmolding, a priori impossible to achieve.

  The present invention relates, in general, to a locking fitting, of the lock, cremone-lock or similar type comprising at least one locking member which, under the action of automatic return means in the locked or semi-closed position. locking, comprises a metal active part provided capable of cooperating with a keeper, knowing that this active part is able to receive, on at least one of its sides capable of cooperating with said keeper, an insert made of a material capable of 'dampen the noise caused by the collision of this metallic active part with said strike. Finally, the invention relates, in itself, to such a

locking.

  It is clear from the above description that

  the object of the present invention responds, advantageously, to the problem posed. Under these conditions, the invention must be considered as representing a clear progress in the

field.

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  Although the invention has been described in connection with an embodiment, it is understood that it is in no way limited thereto and that it is possible to make various modifications to it in terms of shapes, materials and combinations of these various elements without for that

  move away from the framework and the spirit of the invention.

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Claims (10)

Claims   1. Lock fitting of the lock, cremone bolt or similar type comprising at least one locking member, such as a latch bolt (2) which, under the impulse of automatic return means in the locking or semi position -locking, comprise a metal active part (9) provided capable of cooperating with a keeper (7), characterized in that the active part (9) is provided with an insert (12) on at least one of its sides likely to come into contact with the keeper (7), this insert (12) being defined in a material, in particular synthetic, capable of damping, at least in part, the noise of a collision of the part active (9) with said strike (7).   2. Locking member for a lock fitting of the lock, cremone bolt or similar type, comprising an active part (9) which, under the action of automatic means in the locked or semi-locked position, is able to cooperate with a strike (7), characterized in that said active part (9) is provided with an insert (12) on at least one of its sides capable of coming into contact with the keeper (7), this insert (12) being defined in a material, in particular synthetic material, capable of damping, at least in part, the noise of a collision of said active part (9) with said keeper (7).   3. U-bolt for locking fitting of the lock, cremone-lock or similar type, comprising a head (9), one side (10) of which defines a ramp (11) for controlling the reversal of this latch bolt ( 2) in the unlocked position against the action of elastic return means, under the impulse, in particular, of a keeper (7) provided capable of accommodating said latch bolt (2), characterized in that said head (9) is lined, at least on its side (10) defining the ramp (11), with an insert (12) made of a material, in particular synthetic, defined capable of damping, at least in part, the noise of a interlocking of said latch bolt (2) with the keeper (7). 2795119   4. U-bolt according to claim 3, characterized in that the insert (12) is associated with the head (9) by   by means of mechanical connection means.   5. U-bolt according to claim 4, characterized in that at the ramp (11) of the head (9) is formed a groove (14), in particular in the form of a dovetail for the engagement in the latter (14) of the insert (12) of appropriate configuration.   6. U-bolt according to claim 5, characterized by the   fact that the insert (12) is forcibly engaged in the groove (14).   7. U-bolt according to claim 5, characterized by the   causes the insert (12) to be glued into the groove (14).   8. U-bolt according to claim 3, characterized in that the head (9) results from an overmolding process by injecting metallic material into a mold in which is arranged the insert (12).   9. U-bolt according to claim 8, comprising a metal head (9) overmolded on the end (16) of a tail (15), characterized in that the latter is provided, before   overmolding, at said end (16), of the insert (12).   10. U-bolt according to claim 9, characterized in that the insert (12) equipping the end (16) of said tail (15) is defined to be of identical section while being slightly greater than that of the head (9), this insert (12) comprising, in its central part, a recess (18) allowing the flow of the   metallic material in fusion during the molding of said head (9).