FR2791387A1 - LOCKING HARDWARE OF THE CREMONE OR CREMONE-LOCK TYPE COMPRISING A FENDER PROVIDED WITH A COVER FOR THE PASSING OF A FIXING SCREW - Google Patents

Abstract

Accessory (4), attached to edge plate (3), extends under opening (6) made in edge plate to allow passage of fastening screw (6A). Opening is defined to receive contact block (30) associated to accessory, and crosses by hole (27) with opening (31) shaped as sawn-off cone. Contact block has largest thickness (40) equals to thickness (41) of edge plate.

Description

The invention relates to a locking fitting, in particular a cremone bolt or

  cremone bolt, comprising a headrest comprising at least one opening for the passage of a fixing member, in particular a countersunk head screw, at the rear of this headrest being further attached, in particular by riveting, one or more

  accessories such as a rod guide, a screw guide or the like.

  The present invention will find its application in the field of building hardware and relates, in particular, to headrest locking fittings more particularly intended to be embedded in a groove provided in the rebate of an opening

  or a door, window or similar frame.

  Very often, a locking fitting, of the cremone bolt or cremone bolt type, comes to take position in a recess groove provided in the rebate of an opening frame or of a door, window or similar frame. Thus, such a locking fitting comprises at least one housing for the reception of a central control mechanism provided capable of acting on one or more locking members. In the particular case of bolts or bolts and locks, these include one or more

  multiple operating rods extending above and / or between

  below said central box and transmitting the movement of the control mechanism to locking members which can be

  locate at any location on the periphery of an opening frame.

  These cremone bolts or cremone bolts further comprise a headrest to which the casing of the control mechanism is made integral and at the rear of which extend the operating rod or rods. Such a headrest thus comes to close the recess groove in the rebate of the joinery, accommodating these various organs of the locking fitting. To do this, such a headrest has openings for the passage of

  fixing intended to ensure the connection with joinery.

  In this regard, such fasteners are often in the form of countersunk head screws, the latter being able to drown in the thickness of the headrest whose openings for the

  passage of these screws have a frustoconical mouthpiece.

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  In fact, we encounter many difficulties in the context of the realization of these frustoconical mouth openings in a headrest. Thus, because of the particularly high production rates of these locking fittings, only a design by stamping is possible. Indeed, a drilling and milling solution would be much too long and there would be no other solution than to increase the number of workstations.

  work on production lines.

  If, in itself, cutting, by stamping, an opening of any section in a strip material provided capable of designing a headrest, therefore of small width, poses no difficulty, achieve, by this process, a frustoconical mouthpiece, made intervene a phenomenon of material creep with all the difficulties that this poses to control it insofar as one intervenes on a strip material of small width. Thus, this stamping results in the deformation of the lateral edges of the headrest. Also, it is useful to maintain it laterally to avoid these deformations. Furthermore, the operation has a direct influence on the section of the opening for the passage of

the fixing screw.

  Several attempts have already been made to control this problem of material creep in the context of the design by stamping of a frustoconical mouth opening in a strip material intended to define a

  headrest. In particular, it is known, through the document FR-A-

  2,308,440, a process consisting in punching, first in the workpiece, a pilot hole with a diameter greater than the nominal diameter of the final hole, then in making, at the dorsal face of this piece, a circular groove, concentric at the front hole, intended to annihilate any horizontal fluctuation of the metal. Finally, we come to realize the frustoconical mouthpiece by striking by partially pushing the metal back into the hole. This document also relates to specific tools

  allowing the implementation of this process.

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  It is also known, from document FR-A-2,763,522, another tool for shaping by stamping an orifice with frustoconical mouth in a metallic strip material, in particular a headrest, this tool comprising: - a punch comprising a cylindrical part constituting the extension of a frustoconical part; - And a matrix comprising a bore of section adjusted to that of the cylindrical part of the punch, this bore having, at the level of its wall, at least one groove, emerging on the upper face of this matrix opposite the strip material to be shaped , in this or these grooves coming to escape the material

  when stamping the frustoconical mouthpiece.

  Through such a tool, when one comes to carry out the stamping operation, the material, repelled, by creep, is found due to the design of the matrix, at the rear face of the headrest under shape of nipples, these being able to contribute to the guiding of an operating rod

  coming to move at the back of such a headrest.

  Ultimately, if the methods and tools, to which reference is made in these previous documents, make it possible to respond, with more or less success, to the problem of the creep of the material during the design, in a headrest, of a opening with a frustoconical mouth, they do not offer a solution which would avoid this problem. This is precisely what is looking for

to make the present invention.

  In this regard, as part of a first inventive step, it has been observed that at the rear of such a locking plate headrest, of the cremone bolt or cremone bolt type, still very often reported a certain number of accessories. In particular, it is known to attach, in particular by riveting, at the rear, of such a headrest, a screw guide, which, as the name suggests, has the function of guiding a fixing screw coming through the headrest in the direction of the carpentry and to prevent it from getting lodged there. This could have the effect of impeding the movements of an operating rod in the groove

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  that this headrest closes. In fact, very frequently, such a screw guide intervenes, also as

rod guide.

  Accessories are also known in the form of rod guides specifically attached to the rear and to the ends of a headrest. Their function is to maintain and guide the end of a maneuvering rod provided capable of being projecting relative to the opening frame to define, in itself, a locking member intended to cooperate with a keeper formed in correspondence on the frame. sleeping. Such rod guides, for reasons of mechanical strength, communicate, like a screw guide, with an opening in the headrest provided for the passage of a fixing screw intended to be housed in the

  carpentry at the bottom of the installation groove.

  Ultimately, the present invention was to imagine a connection of the headrest of a locking fitting with the carpentry, not directly, but through such an accessory anyway made integral with this headrest by

riveting or similar means.

  To this end, the invention relates to a locking fitting, in particular a cremone bolt or cremone bolt, comprising a headrest comprising at least one opening for the passage of a fixing member, in particular a countersunk screw, to the rear of this headrest being still attached, in particular by riveting, one or more accessories, such as a rod guide, a screw guide or the like, characterized in that at least one accessory, made integral with said headrest, s further extends under an opening in the latter for the passage of a fixing screw, this opening being defined for the reception of a stud associated with the accessory and crossed by a hole with a frustoconical mouth adjusted for the passage and the receiving the screw

countersunk head fixing.

  Thus, the object of the invention is to provide an opening with a frustoconical mouthpiece for the passage of a countersunk head screw, not in the headrest produced by stamping but at the level

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  an accessory intended to be made integral with the latter.

  Under these conditions, one can be satisfied with cutting, by stamping in said faceplate, a simple opening, in particular of circular shape, which avoids the problem of controlling the creep of the material. As for the accessory receiving the frustoconical opening, it should be observed that it is usually carried out through a molding process in particular by injection of synthetic or metallic material so that the very design of the opening with frustoconical mouthpiece at the level of this accessory does not pose any difficulty. Ultimately, the present invention advantageously addresses the problem posed

  since it allows, quite simply, to get around this problem.

  The object of the present invention will be better understood on

  reading of the description which follows relating to a mode of

  realization which is given only by way of indicative and nonlimiting example.

  Understanding this description will be facilitated by

  Referring to the attached drawing, in which: - Figure 1 is a schematic view in elevation and in longitudinal section of a headrest end to which an accessory is attached in the form of a rod exit guide; - Figure 2 is a schematic top view of the accessory attached to the rear of the headrest, as visible in

Figure 1.

  The present invention relates to the field of locking fittings, of the cremone bolt or cremone bolt type, which, under the influence of the control mechanism housed in a central housing (not visible), make it possible to communicate a displacement to operating rods 2 extending above and / or below this housing, such operating rods 2 coming to reflect their movement on locking members, such as rollers,

pannets or the like.

  Very often, such a lever or lock lever takes position in a recess groove provided for this purpose in the rebate of a door, window or the like, groove in

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  which it is sheltered, by means of a headrest 3. To this latter is made integral, usually, the case of

this cremone bolt or cremone bolt.

  In fact, at the rear of a headrest 3 can still be attached one or more accessories 4, here represented in the form of an operating rod outlet guide 2 intended, therefore, to be fixed to the end of said headrest 3 by an appropriate means 5, in particular by riveting. Finally, such a rod exit guide 4 is intended to contribute, on the one hand, to the] 0 holding and guiding of the operating rod 2 relative to this headrest 3 and, on the other hand, it intervenes in while guiding a fixing screw 6A. This crosses an opening 6 in this headrest 3 to come to be housed at the bottom of the groove and to make,

  thus, the whole carpentry.

  This accessory defined by such a rod exit guide 4 necessarily comes to extend under said opening 6 in the

headrest 3.

  Such an opening 6 is defined, according to the invention, capable of receiving a stud 30 associated with this accessory 4 and traversed by a hole 27 comprising a frustoconical mouth 31 for the passage and

  receiving a countersunk head fixing screw 6A.

  Thus, the stud 30 can be defined in circular section or any other shape knowing that the opening 6 provided for the reception of this stud 30, being produced by stamping, can

  easily adopt the shape of this stud 30.

  This is defined as having a thickness 40 at most equal to the thickness 41 of the headrest 3, while the frustoconical mouthpiece 31 will be designed so as to be adjusted to the head of the screw 6A to prevent it from does not, in any case, stand out compared to

  the external face 42 of said headrest 3.

  It will be noted that the stud 30 can, contrary to the situation shown in the figures of the attached drawing, extend from a guide stud as are usually provided with accessories of the screw guide type still playing the role rod guide. More particularly, such a stud

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  guidance is provided capable of extending through an oblong slot which then comprises the operating rod 2 coming

  slide at the back of the headrest 3.

  Finally, insofar as such an accessory 4 is designed, usually, by a molding process of synthetic or metallic material, the production, in itself, of the stud 30 with a hole 27 with a frustoconical mouth 31, poses no problem. As for the opening 6 provided at the level of the headrest 3, it can be produced by simple cutting of material, without creep, which avoids

  deformations of the headrest 3.

  Although the invention has been described with reference to a particular embodiment, it is understood that it is in no way limited thereto and that it is possible to make various modifications to the forms, materials and combinations of these various elements, without for

  this is to depart from the framework and the spirit of the invention.

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Claims (5)

Claims   1. Locking fitting, in particular a cremone bolt or cremone bolt   lock, comprising a headrest (3) comprising at least one opening (6) for the passage of a fixing member, in particular a countersunk screw (6A), at the rear of this headrest (3) being still attached , in particular by riveting, one or   several accessories (4), such as a rod guide, a guide   screw or the like, characterized in that at least one accessory (4), made integral with the headrest (3), further extends under an opening (6) formed in the latter for the passage of a fixing screw (6A), this opening (6) being defined for the reception of a stud (30) associated with the accessory (4) and traversed by a hole (27) with a frustoconical mouthpiece (31) adjusted for the   passage and reception of the countersunk head fixing screw (6A).   2. Locking fitting according to claim 1, characterized in that the stud (30) is defined in circular section, just like the opening (6) in the adjusted headrest (3) to this stud (30).   3. Lock fitting according to any one of   previous claims, characterized in that the stud   (30) is defined as thickness (40) at most equal to the thickness (41) of the headrest (3).   4. Lock fitting according to any one of   previous claims, characterized in that   the frusto-conical mouthpiece (31) at the level of the stud (30) is designed so as to be adjusted to the head of the countersunk head screw (6A) so as to prevent it from projecting from the   external face (42) of said headrest (3).   5. Lock fitting according to any one of   previous claims, characterized in that   the accessory (4), provided with the stud (30), is designed through a plastic or metallic molding process while   the opening (6) in the headrest (3) is designed by stamping.