EP1039082B1 - Espagnolette lock fitting with a face plate having an opening for the passage of a fastening 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 minus an opening defined for the reception of a stud for the passage of a fixing member, in particular a head screw milled, at the rear of this headrest (3) being still attached, in particular by riveting, one or more accessories such as a guide rod, screw guide or the like.

The present invention will find its application in the field of building hardware and concerns, in particular, fittings of headrest lock 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 type or cremone bolt, comes to take position in a groove built-in rebate of an opening frame or a door, window or similar frame. So, such 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 cremone bolts or bolts, these include one or more operating rods extending above and / or below said central box and transmitting the movement of the mechanism control to locking members which may be located at a any location on the periphery of an opening frame.

These cremone bolts or cremone bolts also include a headrest which is made integral with the housing of the control mechanism and the rear of which extend the operating rod or rods. Such a headrest thus closes the recess groove in carpentry rebate, welcoming these different organs of the locking fitting. To do this, such a headrest includes openings for the passage of fasteners intended for liaise with the carpentry.

In this regard, such fasteners are often found under form of countersunk head screws, which are suitable for drowning in the thickness of the headrest including the openings for the passage of these screws have a frustoconical mouthpiece.

In fact, we encounter many difficulties in the context of the realization of these frustoconical mouth openings in a headrest. So, due to production rates particularly high of these locking fittings, only one design by stamping is possible. Indeed, a solution drilling and milling would be too long and there would be other solution than increasing the number of workstations on production lines.

If, in itself, cut, by stamping, a section opening any in a provided strip material capable of designing a headrest, therefore narrow, poses no difficulty, by this process, make a frustoconical mouthpiece, made intervene a material creep phenomenon with all difficulties that this poses to control it insofar as one works on a strip material of small width. So this stamping causes the lateral edges of the headrest. Also, it is useful to maintain, this, laterally, to avoid these distortions. In addition, the operation has a direct influence on the section of the opening for the passage of the fixing screw.

We have already tried, on several occasions, to control this matter creep problem in the context of design by stamping of a frusto-conical opening in a strip material intended to define a headrest. In particular, it is known, through document FR-A-2,308,440, a process consisting of punching, first in the workpiece, a pilot hole with a diameter greater than the nominal diameter of the hole final, then to realize, at the dorsal side of this piece, a circular groove, concentric with the pilot hole, intended for eliminate any horizontal fluctuation of the metal. Finally, we comes to realize the frustoconical mouthpiece by striking in partially pushing the metal back into the hole. This document covers, also, on a specific tool allowing the implementation of this process.

• un poinçon comprenant une partie cylindrique constituant le prolongement d'une partie tronconique ;
• et une matrice comportant un alésage de section ajustée à celle de la partie cylindrique du poinçon, cet alésage présentant, au niveau de sa paroi, au moins une rainure, débouchante sur la face supérieure de cette matrice en regard du matériau en bande à façonner, dans cette ou ces rainures venant s'échapper le matériau lors de l'emboutissage de l'embouchure tronconique.

It is also known, from document FR-A-2,763,522, another tool for shaping by stamping an orifice with a 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 cross section adjusted to that of the cylindrical part of the punch, this bore having, at the level of its wall, at least one groove, opening out on the upper face of this matrix opposite the strip material to be shaped, in this or these grooves coming to escape the material during the drawing of the frustoconical mouth.

Through such a tool, when you come to realize the stamping operation, the material, repelled, by creep, found due to the design of the matrix, at the level of the rear face of the headrest in the form of nipples, these being likely to help guide a rod coming to move at the back of such a headrest.

Ultimately, if the processes and tools, to which it is refers in these previous documents, allow to respond, with more or less success, to the problem of creep of the material when designing, in a headrest, an opening to tapered mouth, they do not offer a solution that would avoid this problem. This is precisely what make the present invention.

Furthermore, in the context of document DE-A-2918970, it is sought a solution to the problem of guiding a fixing screw so as to ensure that she comes to commit, perpendicularly, in the wall defining the bottom of the groove of joinery rebate. Also, it was imagined a tip or a stud similar to an ankle, comprising a body tubular provided able to be inserted through an opening in the headrest, this tubular body being partly completed upper, by a support flange, taking, therefore, support on the edge of the opening in the headrest. The tip or this stud of tubular shape opens out at the level of this support flange through a frustoconical mouthpiece for the reception of the countersunk head of the fixing screw.

In particular in the solution proposed in this previous document, the essential presence of the support flange creates an extra thickness at the front face of the headrest which should be held account at the level of the joinery rebate.

In this regard, as part of a first inventive step, we have could observe that at the back of such a headrest of locking, of the bolt type or lever-lock type, are still very often reported a number of accessories. In in particular, it is known to relate, in particular by riveting, to the back, of such a headrest, a screw guide, which, as its name indicates, has the function of guiding a fixing screw coming from cross the headrest towards the joinery and avoid let her come and stay there awry. This could have consequence of impeding the movements of an operating rod in the recess groove that this headrest closes. In fact, very often, such a screw guide intervenes, also as rod guide.

Accessories are also known in the form of rod guides specifically reported at the back and ends of a headrest. Their function is to maintain and guide the end of a maneuvering rod provided capable of being projecting by relation to the opening frame to define, in itself, a locking intended to cooperate with a strike made in correspondence on the sleeping frame. Such rod guides, for mechanical strength issues, communicate, just like a screw guide, with an opening in the headrest intended for the passage of a fixing screw intended to be housed in the bottom joinery mounting 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 in any case 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 bolt lock, comprising a headrest comprising at least one opening defined for the reception of a stud for the passage of a fixing member, in particular a screw with a countersunk head, at 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 by causes at least one accessory, made integral with the headrest, further extends under an opening in the latter for the passage of a fixing screw, the stud that receives this opening being associated with the accessory and crossed by a mouth hole frustoconical adjusted for the passage and reception of the screw countersunk head fixing, said stud being defined as thick throughout more equal to the thickness of the headrest.

Thus, the object of the invention is to provide an opening to frusto-conical mouthpiece for the passage of a countersunk head screw, not not in the headrest produced by stamping but at a accessory intended to be made integral with the latter. In these conditions one can be satisfied with cutting, by stamping in said headrest, a simple opening, in particular of shape circular, which avoids the problem of controlling the creep of the material. As for the accessory receiving the form opening frustoconical, it should be noted that it is usually performed through a molding process, in particular by injection of synthetic or metallic material so the very design of the frusto-conical opening at the level of this accessory does not poses no difficulty. Ultimately, the present invention advantageously responds to 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 the description which follows relating to an embodiment.

La figure 1 est une vue schématisée en élévation et en coupe longitudinale d'une extrémité de têtière à laquelle est rapporté un accessoire sous forme d'un guide de sortie de tringle ;

La figure 2 est une vue schématisée et de dessus de l'accessoire rapporté à l'arrière de la têtière, comme visible dans la figure 1.

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

Figure 1 is a schematic elevational view in longitudinal section of a headrest end to which is attached an accessory in the form of a rod exit guide;

FIG. 2 is a diagrammatic view from above of the accessory attached to the rear of the headrest, as visible in FIG. 1.

The present invention relates to the field of fittings of locking mechanism, of the bolt type or locking bolt, which, under the influence of the control mechanism housed in a central box (not visible) allow you to communicate a trip to operating rods 2 extending above and / or below it casing, such operating rods 2 coming to reflect their movement on locking members, such as rollers, pannets or the like.

Very often, such a lock or bolt lock takes position in a recessed groove provided for this purpose in rebate of a door leaf, window or the like, groove in which it is sheltered, through a headrest 3. A the latter is made integral, usually, the housing of this cremone bolt or cremone bolt.

In fact, at the back of a headrest 3 can still be reported one or more accessories 4, here represented in the form of a guide operating rod outlet 2 intended, therefore, to be fixed to the end of said headrest 3 by appropriate means 5, especially by riveting. Finally, such an exit guide from rod 4 wants to be able to contribute, on the one hand, to the maintenance and guide of the operating rod 2 relative to this headrest 3 and, on the other hand, it acts as a guide for a screw fixing 6A. This crosses an opening 6 in this headrest 3 to be housed at the bottom of the groove and thus make the whole in solidarity with the 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, suitable for receive a stud 30 associated with this accessory 4 and crossed by a hole 27 comprising a frustoconical mouth 31 for the passage and receiving a countersunk head fixing screw 6A.

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

This is defined as thickness 40 at most equal to thickness 41 of the headrest 3, while the frustoconical mouthpiece 31 will be designed to fit the head of the 6A screw to prevent it does not, in any case, stand out compared to the external face 42 of said headrest 3.

It will be noted that the pad 30 may, unlike the situation represented in the figures of the attached drawing, extend from a guide studs as are usually provided with accessories of the screw-guide type still playing the role of rod guide. More in particular, such a guide pad is provided capable of extending through an oblong light which, then, the rod of operation 2 sliding at the rear of the headrest 3.

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

Claims (4)

1. Locking fitting, viz. an espagnolette or espagnolette-lock, comprising a face-plate (3) including at least one opening (6) defined so as to receive a stud (30) for the passage of a fastening organ, in particular a countersunk screw (6A), against the rear face of this face-plate (3) being also inserted, viz. through riveting, one or several accessories (4), such as a rod guide, a screw guide or the like, characterised in that at least one accessory (4), made integral with the face-plate (3), also extends under an opening (6) provided for in the latter for the passage of a fastening screw (6A), the stud (30) this opening (6) is receiving being associated with the accessory (4) and drilled with a hole (27) with a truncated end (31) adapted for the passage of and for receiving the countersunk fastening screw (6A), said stud (30) being defined with a thickness (40) at most equal to the thickness (41) of the face-plate (3).
2. Locking fitting according to claim 1, characterised in that the stud (30) is defined with a circular cross-section, like the opening (6) in the face-plate (3), adjusted to this stud (30).
3. Locking fitting according to any of the preceding claims, characterised in that the truncated end (31) at the level of the stud (30) is designed so as to be adjusted to the head of the countersunk screw (6A), so as to avoid the latter from protruding out of the external face (42) of said face-plate (3).
4. Locking fitting according to any of the preceding claims, characterised in that the accessory (4), provided with the stud (30), is made by means of a plastic or metallic material moulding process, whilst the opening (6) in the face-plate (3) is made through deep-drawing.

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