METALWARE FOR A WINDOW

The present invention relates to the metalware for a window, in particular the set of accessories, usually metallic, which are applied to the window frame to allow its opening and closure.

The term window will refer to the windows properly speaking, but also more generally to French windows, doors, skylights, and the like.

The technical characteristics of the window are described below with reference to the configuration that it most commonly assumes, that is, the configuration in which it is arranged vertically.

In a widely known manner, the window comprises a fixed frame, a movable frame and a handle which facilitates movement of the movable frame during opening and closure. The fixed frame develops mainly in a vertical plane. In a known manner, the handle also controls locking members which allow the movable frame (or shutter) to be locked in the closure position. The locking members may comprise one or more latches, usually movable along the vertical direction. Each latch, vertically protruding from the shape of the movable frame, engages a respective seat obtained by means of a hole in the fixed frame. In addition, or alternatively to the latches, the locking members may also comprise one or more locking pins. Also the locking pins are usually movable along the vertical direction, but unlike the latches they do not vertically protrude from the shape of the movable frame. The locking pins run along a strut of the mobile frame and are designed to engage suitable seats having the shape of a U (hereinafter referred to as U-shaped seats) formed on a matching structure to which the strut of the movable frame abuts when it is brought into the closed position. The matching structure may consist of the fixed frame in the case of a single-shutter window or, in the case of a multiple- shutter window, from the strut of the other movable frame.

Each U-shaped seat must therefore be suitable for receiving a respective locking pin. The coupling between the locking pin and the respective U- shaped seat must be as accurate as possible. On the one hand, to allow a firm and reliable closure of the shutter, the coupling must not have excessive clearance. The relative dimensions of the locking pin and of the respective seat are defined during the design process also for this purpose. On the other hand, to allow an easy closure, there must be no interference between the locking pin and the respective U-shaped seat, and this is achieved by a correct relative positioning of the locking pin with respect to the U-shaped seat.

Of course, during the design step of the window and of the respective metalware, a nominal position of the locking pins and of the U-shaped seats is defined, which guarantees a perfect coupling, without clearance and without interference. However, when the window is implemented, it is no longer in the ideal design conditions and therefore the relative position between the locking pins and the respective U-shaped seats varies slightly with respect to the nominal position.

Once the window has been placed, therefore, it must be possible to perform a fine adjustment of the relative position of each locking pin and the respective U-shaped seat. It is usually provided that the locking pins can be moved, within a range of few millimetres, laterally to the axis Z along which they move. A more detailed description of this known solution is provided later.

The windows that allow two different types of opening are particularly widespread and appreciated. A first type of opening, called a swing opening, is that in which the shutter is free to rotate around the main hinge axis (usually vertical and placed laterally to the movable frame). This movement allows to open the window completely, for example to let a large amount of air pass through. This opening allows at the same time the passage through the window of voluminous objects or people, possibly even unwanted. Moreover, unless the auxiliary closure devices are provided outside the window, this type of opening leaves the shutter free to move independently with respect to the user's will, typically following the air drafts. A second type of opening is that which instead allows the shutter a limited movement and which, once the opening limit has been reached, keeps it almost steady in position. Usually this type of constrained opening is called fanlight and is obtained by rotating the shutter around a secondary hinge axis (horizontal and located below the movable frame). This second type of opening allows the passage of a reduced amount of air, does not allow the passage of people at all and prevents the shutter from moving in an unwanted way.

In order to control the locking members, the handle can rotate around an axis perpendicular to the plane of the movable frame, so as to take different positions. Usually the handle comprises a lever which can rotate between three positions: a closure position, a swing opening position and a fanlight opening position.

Generally, the locking position of the shutter is obtained with the handle vertically, for example with the lever facing downwards. By turning the handle 90°, and then bringing it horizontally, it usually moves into the swing opening position. By further turning the handle another 90°, and then bringing it vertically again but with the lever facing upwards, it moves into the fanlight opening position. Within an overall rotation of 180°, the handle must therefore be able to provide a sufficient stroke for moving the locking members so that they move from one to the other of the three configurations. Generally, it is always been considered that it was not appropriate to allow the handle a rotation angle greater than 180°. In this way, in fact, the handle lever would exit from the outer shape of the movable frame, which is an event that has always been considered as undesirable.

The window metalware of the known type comprises a strip and a rod which support the locking members and the handle. The strip is fixed to the thickness of the free strut of the movable frame. Below the fixed strip, in a dedicated channel, the rod, which by contrast is free to slide along the strut of the movable frame, is housed. A latch can be mounted at the end of the rod. In addition, slots are provided along the fixed strip through which the locking pins mounted on the underlying rod protrude, usually by riveting of a tang.

As said before, the position of the locking pin must be able to be varied, at the construction site, laterally with respect to the Z axis along which it translates. A solution known for achieving this object envisages the realisation of the locking pins with a cylindrical body with a circular section and the application of the tang in a slightly displaced position with respect to the axis of the cylindrical body. The tang is then riveted in a hole of the rod, so that it can be rotated in the hole itself, although with difficulty. This solution allows the installer who mounts the window to adjust the relative position of the locking pin with respect to the U-shaped seat, by rotating with a tool (e.g., a wrench or pliers) the locking pin around its tang. The eccentric rotation of the locking pin allows the latter to have slightly different positions on the side of the axis Z. Once the installation step is over, under normal window use, the friction due to riveting keeps the locking pin in the position defined by the installer.

Another solution for the same purpose is to realise the locking pin with a cylindrical body having an elliptical section instead of a circular one. In this case the tang can be applied coincidentally with the axis of the cylindrical body. Apart from this small difference, in all other aspects this solution is exactly the same as the previous one. The tang is riveted in a hole of the rod, so that it can be rotated with difficulty and the rotation of the elliptical body of the locking pin allows the latter to have slightly different dimensions on the side of the axis Z. Also in this case, the friction due to the riveting keeps the locking pin in the position defined by the installer.

The handle is also mounted at an intermediate point of the strip. The handle comprises a pinion that engages a rack integral with the rod. The handle rotation therefore determines the pinion rotation and thus the translation of the rack and of the rod integral thereof. The translation of the rod determines an identical translation of the latch and/or the locking pins, a translation necessary to move from the locking position of the shutter to the opening position.

From the foregoing, the skilled person can easily understand how the maximum translation that can be obtained for the locking members is limited by the pitch radius of the pinion. In fact, the overall rotation of the handle being fixed in just 180°, the maximum translation obtainable for the rod along which to place the three positions (locking, free opening, constrained opening) is equal to the pitch radius of the pinion multiplied by

TT.

In turn, however, the pinion dimensions, and therefore its pitch radius, are not free from constraints at all. In particular, it is commonly believed that the window structures (i.e. the fixed frame and the movable frame) must be as small as possible in order to favour the glazed surface. From this constraint derives that the reduced dimensions of the strut which houses the handle and the locking members limit the radius of the pinion in cascade and therefore the maximum stroke of the rod.

In the locked position each of the locking pins must be housed inside the respective U-shaped seat, while the latch must sink as far as possible into the respective hole seat. On the contrary, the locking pins in the opening position must be completely outside the respective U-shaped seats and the latch must be completely outside the respective hole seat. The maximum diameter of the locking pins is therefore limited by the stroke which can be obtained with a 90° rotation of the handle.

Flowever, the windows and the related locking members described so far, although widely appreciated, are not free from defects.

As the skilled person can well understand, the fixing of the locking pins is not completely stable. This implies that, in some conditions, even when the window is normally used, they can rotate in an undesired manner by introducing clearance or interference with respect to the U-shaped seat. In this case, therefore, the rotation of a locking pin implies a malfunction of the entire window. Some conditions that can lead to an undesired rotation of the locking pins can occur during normal use, e.g. when the normal regulation is carried out many times and a slight wear of the coupling between the locking pin and the rod is therefore introduced. Furthermore, an excess of lubrication of the metalware can drastically reduce the friction effect between the locking pin and the rod. Moreover, the undesired rotation of the locking pin can also derive from tampering, e.g. by criminals who force the opening of the window.

Therefore, the object of the present invention is to overcome the drawbacks underlined before with respect to the prior art.

In particular, a task of the present invention is to make available a window metalware whose locking pins, although allowing the adjustment, are well anchored during the normal use of the window.

In this way, the metalware for a window allows to obtain locking pins with greater mechanical resistance and therefore to increase the level of safety. Furthermore, a task of the present invention is to provide a metalware for a window which, alongside the advantages introduced with respect to the known solutions, also maintains their benefits.

This object and these tasks are achieved by means of a window metalware according to claim 1 , and by means of a window according to claim 9.

To better understand the invention and appreciate its advantages, some of its exemplifying and non-limiting embodiments are described below with reference to the accompanying drawings, wherein:

- figure 1 schematically shows a first type of known window in a closed configuration;

- figure 2 schematically shows a second type of known window in a closed configuration;

- figure 3 schematically shows the window of figure 1 in an open configuration;

- figure 4 schematically shows the window of figure 2 in an open configuration; - figure 5 schematically shows an enlarged view of the detail referred to as

V in figures 3 and 4;

- figure 6 schematically shows an enlarged view of the detail referred to as

VI in figure 5, in a configuration;

- figure 7 schematically shows the view of the detail of figure 6, in a different configuration;

- figure 8 shows a perspective view of a window according to the invention, in a closed configuration;

- figure 9 shows a front view of the window of figure 8;

- figure 10 shows a perspective view of a shutter of the window of figure 8;

- figure 11 shows an enlarged view of the detail referred to as XI in figure 10;

- figure 12 shows a view of the section made along the plane XII-XII of figure 11 ;

- figure 13 shows an enlarged view of the detail referred to as XIII in figure 12;

- figure 14 shows a perspective view of a locking pin according to the invention;

- figure 15 shows an exploded perspective view of the locking pin of figure 14;

- figure 16 shows an enlarged view of the detail referred to as XVI in figure 10, wherein the U-shaped seat has been added; and

- figure 17 shows a view of the section made along the plane XVII-XVII of figure 13.

Since the invention is designed to be used in presence of gravitational acceleration g, it is intended that the latter uniquely defines the vertical direction.

The present invention relates to a window 20 and the respective metalware 30. In a known manner per se, the window 20 comprises a fixed frame 22 and a movable frame 24 which can rotate around a hinge axis Y. Below reference will be made, in an exemplary and non-limiting manner, to the most common configuration of the window 20, in which the hinge axis Y is vertical. However, the skilled person will have no difficulty in reporting the teachings of the invention in a window 20 having a different configuration, for example in which the movable frame 24 rotates around a horizontal axis.

The metalware 30 is, in a manner known per se, the set of accessories, usually metallic, which are applied to the window 20 to allow its opening and closure.

The metalware 30 according to the invention comprises:

- a strip 32 suitable for being fixedly mounted on a strut 240 of the window 20;

- a rod 34 mounted on the strip 32 so as to be slidable with respect to the strip 32 along a direction Z;

- at least one locking pin 36 mounted on the rod 34 and comprising:

- a main body 360 which defines an own geometric axis s,

- a tang 364 which extends from the main body 360 and defines an own geometric axis t, and

- a prismatic portion 362 placed between the main body 360 and the tang 364;

wherein

- the axes s and t are parallel and spaced the one with respect to the other,

- the cross section of the prismatic portion 362 is a regular polygon p centred on axis t of the tang 364,

- the tang 364 is fixed on the rod 34 so as to be rotatable around axis t,

- the strip 32 comprises, in correspondence of the locking pin 36, a slot 320;

- the prismatic portion 362 of the locking pin 36 is at least partially comprised in the slot 320 of the strip 32; and

- the main body 360 of the locking pin 36 protrudes from the strip 32 in the direction opposed to the one of the rod 34. The rod 34, the strip 32 and therefore the entire metalware 30 share the same prevalent development direction, and the rod 34 is free to slide along the strip 32 along such direction, hereinafter referred to as axis Z. Preferably the main body 360 of the locking pin 36 has a cylindrical shape, preferably with a circular section. According to some embodiments (see, e.g., figures 12 to 15), the main body 360 also comprises an outer skirt 366 which can rotate about the main body 360 and the respective geometric axis s. The presence of the outer skirt 366 facilitates the sliding of the locking pin 36, in particular when there is a slight contact with the U- shaped seat 244.

Preferably the tang 364 is realised in such a way as to facilitate the fixing by riveting on the rod 34. For example, as can be seen in the attached figures 14 and 15, the end portion of the tang 364 can take a tapered and hollow shape, a shape which facilitates the plastic deformation once the end portion of the tang 364 has been introduced into the respective hole on the rod 34.

As mentioned, the cross section of the prismatic portion 362 is a regular polygon p. The fact that the polygon p is regular, ensures that there is no ambiguity in referring to its centre, since for the regular polygons the centre is uniquely defined. Preferably the regular polygon p has an even number of sides and even more preferably it is a square, a hexagon or an octagon.

The slot 320 has, in a manner known per se, a length L oriented parallel to the axis Z and a width / oriented perpendicularly to the axis Z; see, e.g., figures 6 and 7. Also the slot 320 provided in the strip 32 according to the invention has a length L oriented parallel to the axis Z. As regards the dimension perpendicular to the axis Z, the slot 320 according to the invention has an operation width which extends for most of the length L. Moreover, at one end, the slot 320 preferably comprises an adjustment area 324 which has an adjustment width IM greater than the operation width /L A more detailed description of these parameters is provided below for some embodiments of the invention.

Preferably, the operation width k of the slot 320 is slightly greater than twice the apothem of the polygon p. Advantageously the operation width k of the slot 320 may exceed twice the apothem of the polygon p of an amount ranging between 0.05 mm and 0.25 mm. This allows the prismatic portion 362 to translate along the slot 320 without interference with the inner edges 322 of the latter, when a pair of sides of the polygon p is parallel to the axis Z.

Moreover, the operation width k of the slot 320 is considerably smaller than the longer diagonal of the polygon p. This prevents the prismatic portion 362 from rotating about its own axis t when it is received in the slot 320.

The relationships shown above are the same as those between a nut (or a bolt) and the respective open-end wrench. The width of the wrench is slightly greater than twice the apothem and is significantly smaller than the longer diagonal of the polygon that defines the nut section. When the nut is engaged in the wrench, by applying a torque that tends to impose a relative rotation between the two elements, a pair of corners of the nut rests on the inner edges of the wrench, preventing rotation. Similarly, in the metalware 30 according to the invention, when the prismatic portion 362 is engaged in the slot 320, by applying a torque which tends to impose a relative rotation between the two elements, a pair of corners of the prismatic portion 362 rests on the inner edges 322 of the slot 320 preventing rotation. For this reason, the regular polygon p has an even number of sides and, preferably, it is a square, a hexagon or an octagon. These polygons allow an effective lock with respect to rotation and an adequate number of operation positions for the locking pin 36 with respect to the strip 32. As the number of sides of the polygon increases, the effectiveness of the lock with respect to rotation is greatly reduced, since a section which is increasingly similar to a circular section is obtained.

As mentioned, each slot 320 comprises an adjustment area 324, centred and communicating with the slot 320 and arranged at one of its ends along the axis Z. As can be seen from the attached figures 10, 1 1 , 16 and 17, the presence of the adjustment area 324 confers to the slot 320 a shape that resembles a keyhole. The adjustment area 324 has an adjustment width l _m greater than the operation width . In particular, the adjustment area 324 has an adjustment width IM greater than the longer diagonal of the polygon p. This allows the prismatic portion 362 to rotate about its own axis t when it is received in the adjustment area 324.

In a manner known per se, the metalware 30 also comprises a rack 40 and a pinion 42. The rack 40 is mounted in a firm manner on the rod 34. The pinion 42 is mounted on the strip 32 so that it can rotate about a fixed axis Xwith respect to the strip 32, engaging the rack 40. This makes it possible to impose a stroke to the rod 34 with respect to the strip 32 along the axis Z.

According to the invention, the configuration of the metalware 30 defines an operation stroke SL of the rack 40 (and therefore of the rod 34 and of the locking pins 36) along the direction Z. The operation stroke SL is obtained with an ordinary rotation angle a of the pinion 42 and allows the metalware 30 to pass from one usual configuration of use to the other. In some embodiments the usual configurations of use are two: locked and swing opening configurations. In this case, the ordinary rotation angle a separates the locked configuration from the swing opening configuration. According to other embodiments, the usual configurations of use are three: locked, swing opening and constrained opening configurations. The ordinary rotation angle a is formed by an angle CM , which separates the locked configuration from the swing opening configuration, and an angle 02, which separates the swing opening configuration from the constrained opening configuration.

Moreover, the metalware 30 according to the invention preferably define an adjustment extra-stroke SR of the rack 40 (and therefore of the rod 34 and of the locking pins 36) along the direction Z. The adjustment extra- stroke SR is added to the operation stroke SL (see in particular figure 16) and is obtained with an extraordinary rotation angle b of the pinion 42 which is added to the ordinary rotation angle a described above.

For instance, the ordinary rotation angle a of the pinion 42 can be 180° as described with reference to the prior art. For instance, the extraordinary rotation angle b can be of additional 10° which are added to the 180° of the angle a. See figure 9 in this regard.

The operation stroke SL moves each locking pin 36 along the respective slot 320 to pass from one normal configurations of use to the other. The adjustment extra-stroke SR instead carries the locking pin 36 to the end of the slot 320, so as to make it enter the adjustment area 324. Once the locking pin 36 has been moved into the adjustment area 324, the prismatic portion 362 no longer engages the inner edges 322 of the slot 320 and can therefore rotate about its own geometric axis t. Since the geometric axis t of the tang 364 and of the prismatic portion 362 does not coincide with the geometric axis s of the main body 360 of the locking pin 36, the latter can be moved, within a range of few millimetres, laterally with respect to the axis Z. For example, the locking pin 36 can be moved laterally with respect to the axis Z within a range of 2,4 mm.

The adjustment manoeuvre of the locking pin 36 will have to bring the prismatic portion 362 to rotate until another pair of sides of the polygon p is parallel to the axis Z. In particular, therefore, the locking pin 36 according to the invention can have a finite number of positions on the side of the axis Z.

Preferably (see, e.g., figure 16), the main body 360 of the locking pin 36 comprises a mark 365 which is useful for providing a reference to the user. In particular, the mark 365 can be advantageously arranged in such a way that it is parallel to the axis Z when the locking pin 36 is symmetrically centred on the axis Z itself.

In the metalware 30, the rod 34 has an outer surface 340 facing the strip 32, an inner surface 342 opposite the outer surface 340, and a thickness which separates the outer surface 340 from the inner surface 342. According to some embodiments of the invention, the pitch surface of the rack 40 can be spaced, with respect to the inner surface of the rod 34, towards the strip 32, beyond the half thickness of the rod 34. This solution allows, with the same overall dimensions of the metalware 30, to increase the pitch diameter of the pinion 42 and therefore to increase the overall maximum stroke of the rod 34 with respect to a traditional solution. An increased overall maximum stroke may be advantageous in view of the need to provide the adjustment extra-stroke SR which is added to the normal operation stroke SL.

This solution, described in further details below, was developed by the same Applicant and is the subject of the Italian patent application no. 1020170001 15099.

The magnitude of the maximum stroke is directly connected to the pitch diameter of the pinion 42, as well as to the rotation angle which it can perform during operation. However, as already said in relation to the prior art, since the overall rotation of the pinion 42 is limited, it follows that the maximum stroke is a function of the only pitch diameter of the pinion 42. These technical features are better understood by comparing the solution considered here with the prior known art. In the prior art, the pitch surface of the rack 40 lies substantially on the same plane as the inner surface 342 of the rod 34. More in particular, in some known solutions the rack 40 can be made as a separate piece and then applied on the rod 34. In this case the pitch surface of the rack 40 is slightly spaced, with respect to the inner surface 342 of the rod 34, towards the pinion 42, that is on the opposite side of the strip 32. In other solutions the rack 40 can instead be obtained by notching the teeth in the material of the rod 34 itself, for example by plastic deformation of the material or by chip removal. In this case, therefore, if the notch takes place from the inner surface 342 of the rod 34, it is clear that the pitch surface of the rack 40 will be slightly spaced, with respect to the inner surface 342 of the rod 34, towards the strip 32. This displacement, however, is not comparable with that of the solution developed by the Applicant, in which the pitch surface of the rack 40 is displaced, with respect to the inner surface 342 of the rod 34, towards the strip 32 beyond the half thickness of the rod 34.

According to some embodiments of the invention, the pitch surface of the rack 40 is spaced, with respect to the inner surface 342 of the rod 34, beyond the outer surface 340 of the rod 34.

According to some embodiments of the invention (see, e.g., figures 10 and 1 1 ), the strip 32 of the metalware 30 comprises a slot 321 at the rack 40. The slot 321 (which can be blind or through) allows to house the footprint of the rack 40 and/or the rod portion 34 on which the rack 40 is mounted. According to some embodiments of the invention, the rod 34 comprises a through opening within which a channel-shaped structure is arranged and the rack 40 is arranged in the channel-shaped structure.

According to other embodiments of the invention, instead, the rod 34 comprises a shifted section with respect to the prevalent development of the rod 34 and the rack 40 is arranged on the shifted section. In particular, a rectilinear rod 34 can be subjected to successive bends in order to obtain the shape desired.

In all the embodiments described, the rack 40 can be made as a separate piece and then applied respectively on the channel-shaped structure or on the shifted section, or it can be obtained by notching the teeth in the material of the channel-shaped structure or of the shifted section.

In light of the foregoing, therefore, the slot 321 of the strip 32 houses slidingly the channel-shaped structure or the shifted section of the rod 34. In particular, the length of the slot 321 allows the channel-shaped structure or the shifted section to slide freely during the movement of the locking members. In particular, the slot 321 develops in the direction of the axis Z, in order to allow the rack 40 to slide in this direction. The movement allowed to the rack 40 must be at least equal to the sum of the operation stroke SL and of the adjustment extra-stroke SR. Preferably, the metalware 30 comprises locking members such as the locking pins 36 described above and possibly one or more latches 368 mounted in a firm manner on the rod 34.

According to another aspect, the invention also relates to a window 20 comprising a fixed frame 22 and a movable frame 24 which is movable between a complete opening position and a complete closure position. The movable frame 24 comprises a strut 240 on which the metalware 30 is mounted according to the invention. The strut 240 must have transversal dimensions sufficient to house the entire metalware 30 inside. The metalware 30 according to the known art and the metalware 30 according to the invention need respective struts having identical dimensions. However, as already underlined above, the strut 240 of the window according to the invention can possibly house a metalware 30 with a pinion 42 of greater pitch diameter and which therefore allows a greater maximum stroke for the locking members.

Advantageously, the movable frame 24 can rotate around a hinge axis Y. The direction of the hinge axis Y is preferably parallel to the prevalent development direction Z of the metalware 30. Usually, both the hinge axis Y and the prevalent development direction Z of the metalware 30 are substantially vertical.

Preferably, the window 20 further comprises a handle 26 suitable for imposing on the pinion 42 a rotation around the axis X. As can be seen in figure 12, one way of connecting the handle 26 to the pinion 42 is to mount both of them on a bar suitable for transmitting the rotation, for example a square-section bar. However, as the skilled person can well understand, other kinematic connections can be employed for this purpose.

In a manner known per se, when the movable frame 24 is in the complete closure position, the strut 240 on which the metalware 30 is mounted matches to a matching structure 242. In a similar known way, in the windows 20 with a shutter (as for example the one represented schematically in figures 1 and 3) the matching structure 242 is a strut of the fixed frame 22. Alternatively, in multi-shutter windows 20 (such as that represented schematically in figures 2 and 4 or in figures 8 and 9), the matching structure 242 is a strut of a second movable frame. Preferably, the second movable frame is fixed with respect to the fixed frame 22, in order to remain firmly in position and to provide reliable abutment for the movable frame 24.

In a known manner per se, when the metalware 30 comprises one or more latches 368, the fixed frame preferably comprises as many hole seats 246, each of which is suitable for receiving a latch 368 which accesses it by sliding in the direction Z.

Similarly, when the metalware 30 comprises one or more locking pins 36, the matching structure 242 preferably comprises as many U-shaped seats 244, each of which is suitable for receiving a locking pin 36 which accesses it by sliding in the direction Z. For a firm and secure closure of the window 20, each locking pin 36 must enter as far as possible into the groove of the respective U-shaped seat 244.

The operation of the window 20 and of the related metalware 30 is briefly described below. After the installation, it is likely that at least one of the locking pins 36 has lost the design alignment with the respective U-shaped seat 244, thus introducing an interference which makes the closure movement difficult or impossible. In this case the installer must proceed to adjust the position of the locking pin 36. To do this, the following steps are necessary:

- imposing on the handle 26 the entire ordinary rotation angle a so as to bring the locking pin 36 at the end of the operation stroke SL along the slot 320, in the use configuration opposite to the locked configuration;

- moving away the strut 240 on which the metalware 30 is mounted from the related matching structure 242;

- imposing an extraordinary rotation angle b on the handle 26 so as to impose an adjustment extra-stroke SR on the locking pin 36 up to the adjustment area 324 of the slot 320; - imposing to the locking pin 36 a predetermined rotation about the geometric axis t of the tang 364 so as to make a pair of sides of the polygon p parallel to the axis Z;

- imposing an extraordinary rotation angle -b to the handle 26 so as to impose to the locking pin 36 a stroke -SR reverse to the adjustment extra stroke SR which brings it back from the adjustment area 324 in the slot portion 320 having an operation width k.

At this point it is possible to approach again the strut 240 to the related matching structure 242 and impose the entire ordinary rotation angle -a to the handle 26 so as to bring the locking pin 36 to the locked configuration.

If the locking pin 36 reaches the locked configuration without an abnormal effort, then the adjustment is over. If, instead, it is impossible to bring the locking pin to the locked configuration or it is possible only by an abnormal effort, then it is necessary to repeat the adjustment described above, while carefully changing again the pair of sides of the polygon p which is parallel to the axis Z. In doing so, the presence of the possible mark 365 can be useful to give a reference point to the installer.

As the skilled person can understand, the invention allows to overcome the drawbacks highlighted above with reference to the prior art.

In particular, the present invention provides a window metalware whose locking pins, although allowing the adjustment, are well anchored during the normal use of the window.

In this way, the metalware for a window allows to obtain locking pins with greater mechanical resistance and therefore to increase the level of safety. Furthermore, the present invention provides a metalware for a window which, alongside the advantages introduced with respect to known solutions, also maintains the benefits inherent in the latter.

It is clear that the specific features are described in relation to various embodiments of the invention with exemplifying and non-limiting intent. Obviously, a person skilled in the art may make further modifications and variations to this invention, in order to meet contingent and specific requirements. For example, the technical features described in connection with an embodiment of the invention may be extrapolated from it and applied to other embodiments of the invention. Such modifications and variations are, however, contained within the scope of the invention, as defined by the following claims.