Friction hinge for a pivoting door, window or shutter and method for mounting said pivoting door, window or shutter

Abstract

 Friction hinge for a pivoting door, window or shutter, comprising a first friction body susceptible of being held on the fixed frame of the door, window or shutter through first fastening means mechanically engaged to a first anchoring cavity of the fixed frame and rigidly fixed to the first friction body; and a second friction body pivotably mechanically coupled to the first friction body and susceptible of being fixed to the movable leaf of the door, window or shutter through second fastening means mechanically engaged to a second anchoring cavity of the leaf and rigidly fixed to the second friction body. The first and second fastening means each comprise a plate fixed to the respective inner or outer side of the corresponding first and second section bar and a counterplate provided with an engagement portion constrained by interference inside the first or second recess of the corresponding first or second section bar beneath the plate and fixed to the corresponding first or second friction body through a pair of first screws each having the head constrained to the friction body, and the shaft passing through a hole of the relative first or second friction body aligned with a first opening formed in the plate and engaged by screwing in a first threaded hole of the counterplate.

Description

[0001] The present invention concerns a friction hinge for a pivoting door, window or shutter and a method for mounting said pivoting door, window or shutter.

[0002] More specifically, the friction hinge concerned is intended to be advantageously used in the door, window or shutter industry to allow pivoting wings to move about a horizontal axis or a vertical axis, with respect to a frame mounted in a fixed manner on walls of buildings of any kind. The aforementioned pivoting wings are increasingly used for architectural reasons when making windows, skylights, or portholes.

[0003] As known, pivoting doors, windows or shutters can rotate about a horizontal rotation axis, generally placed half-way up the door, window or shutter, or about a vertical rotation axis that can be centred or even decentred, as there is no need for balancing like in the case of horizontal pivoting.

[0004] In the case of horizontal pivoting, usually when opening the lower part of the leaf projects outwards and the upper part projects inwards. For the pivoting door, window or shutter the hinges must be equipped with frictions to prevent the uncontrolled rotation of the leaf and allow opening to be regulated.

[0005] The accessory that allows the pivoting leaf to pivot is commonly known in the field by the term "pivot hinge" or "friction hinge", and hereafter the latter term will be used. Such a friction hinge is usually obtained through two distinct bodies, one intended to be fixed to the leaf, and the other to be fixed to the frame of the pivoting door, window or shutter. The two friction bodies are pivotably coupled together, in angularly adjustable position, through a mutual holding relationship by friction with respect to the relative rotation motion. The friction force that holds the pivoting door, window or shutter in position is of adjustable intensity and for this purpose an adjustment screw is usually foreseen that keeps the two friction bodies under compression with the desired force.

[0006] On the market there is a friction hinge, for example used for pivoting doors, windows or shutters using section bars of the line with the trade name "R", which foresees being fixed preferably in the middle of the frame through plates (or base blocks) inserted in recesses of the leaf and of the frame and fixed there in contrast against a projecting tooth of the recess, through dowels preferably of the grub screw type. The two friction bodies of the hinge are then fixed onto the plates through screws.

[0007] The dowel engages to the door, window or shutter through an irreversible deformation of the metal section bar of the door, window or shutter itself, consisting of an extruded piece of aluminium. The engagement of the dowel is indeed obtained through the formation of a cavity on the metal section bar, which is shaped by the penetration of the end of the dowel in the section bar.

[0008] The main drawback of the known friction hinge described above is the difficulty that the fitter has in mounting the door, window or shutter and fixing such a hinge to the leaf and to the frame in the correct position. Indeed, if the plates are not placed with precision in the recess of the section bar, for example usually at the middle thereof, the dowels produce a milling impression on the metal section bar of the frame in a position that is then difficult to change.

[0009] The fitter must therefore take special care in positioning the plates since if they are not fixed with the dowels exactly in the correct final position suitable for ensuring the perfect closure of the pivoting door, window or shutter, it is then difficult to move the dowels, i.e. to carry out a fine adjustment of the position of the plates along the longitudinal direction of the anchoring cavity, since clearly the dowel will tend to move and go back inside the cavity that has already formed on the section bar.

[0010] The friction hinge described above does nevertheless have the advantage of being able to mount the leaf of the pivot, with the friction body already fixed, by inserting it frontally inside the frame.

[0011] In accordance with a different embodiment, the two bodies of the friction hinge are equipped with a shaped foot to insert directly into the anchoring cavity of the section bar of the door, window or shutter without the use of intermediate plates. The need to fix the feet directly into the recess of the section bar of the door, window or shutter prevents the possibility of frontal installation of the leaf on the frame. Indeed, in accordance with this embodiment of friction hinge, once the friction hinge is secured on a first frame of the door, window or shutter with its foot fixed through self-tapping screws to the relative recess of the first frame, it is no longer possible to frontally mount the leaf on the frame by interference of the hinge itself and it is thus necessary to leave the second frame without one side in order to be able to slot the hinge already fixed to the first frame into the anchoring cavity of the second frame.

[0012] The correct fastening position of the feet of the two bodies is theoretically defined through measurement. Once such a position has been defined, the two bodies of the hinge are definitively fixed to the relative section bars through self-tapping screws. If the position of the hinge is not perfectly correct, it is necessary to replace the section bar that has been involved in the fastening of the hinge with the screws with another new one, given that it is impossible to make a new hole a few millimetres or tenths of millimetres from the previous hole.

[0013] In the field of pivoting doors, windows or shutters the problems connected with the mounting of the hinges on the profiles of the doors, windows or shutters have particular importance.

[0014] A particular requirement in the installation of pivoting doors, windows or shutters is the need to modify the position of the hinges, once they have been mounted, in order to allow the necessary adjustment operations to be carried out.

[0015] Indeed, it must furthermore be considered that when the pivoting door, window or shutter is mounted, the glass pane has not yet been installed. The latter, once mounted, substantially increases the weight of the pivoting leaf and closes up all the clearances of the support kinematism of the leaf on the frame with the consequence that inevitably the position of the leaf falls at least slightly. If the fitter has not predicted this yielding he must try to move the leaf with difficult adjustments or with the replacement of the section bars.

[0016] The friction hinges of the type described above therefore have the main drawback of not allowing adjustments of their position to be carried out along the anchoring cavity of the frames.

[0017] The process for mounting such friction hinges is consequently very complex and requires particularly specialised workers in order to allow the leaf of the pivot to be mounted in an optimal manner and with perfect seal on the frame.

[0018] On the market there are numerous section bars of pivoting doors, windows or shutters, the dimensions of which can vary slightly, for example depending on the manufacturer, even in the case in which they refer to standardised models like in the case of well-known European chamber section bars.

[0019] In particular, the different section bars have anchoring recesses of different dimensions with holding teeth that vary their shape and their projection above the recess. Consequently, the hinges must currently be optimised for the specific section bar on which they must then be mounted. Therefore, manufacturers of friction hinges for pivots as well as the fitters that work with different doors, windows and shutters must hold in stock a large number of hinges, each susceptible of being mounted on a specific corresponding section bar of a door, window or shutter. This circumstance means an increase in production and installation costs, which, in the end, result in a higher cost of the pivoting door, window or shutter.

[0020] In this situation, the basic purpose of the present invention is therefore to avoid the drawbacks encountered in the known solutions quoted above, providing a friction hinge for a pivoting door, window or shutter, which can be installed in section bars of doors, windows or shutters having different dimensional characteristics and in particular anchoring recesses of different dimensions.

[0021] Another purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which permits adjustment of its position after having been mounted on the section bars of the door, window or shutter.

[0022] A further purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which allows adjustment of the position of the leaf with respect to the fixed frame in a totally safe and extremely precise manner.

[0023] Another purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which permits its adjustment even with the door, window or shutter installed and in particular after the glass pane has been mounted. Another purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which allows pivoting doors, windows or shutters of substantial weight to be supported.

[0024] Another purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which is constructively simple and operatively totally reliable.

[0025] Another purpose of the present finding is to provide a friction hinge for a pivoting door, window or shutter, which allows the storage costs to be reduced.

[0026] A further purpose of the present finding is to provide a method for mounting a pivoting door, window or shutter, which allows the costs linked to its production process and to its maintenance to be reduced.

[0027] A further purpose of the present finding is to provide a method for mounting a pivoting door, window or shutter, which allows the movable leaf to be applied frontally in the fixed frame.

[0028] A further purpose of the present finding is to provide a method for mounting a pivoting door, window or shutter, which allows the position of the leaf to be adjusted with respect to the frame in a precise manner.

[0029] A further purpose of the present finding is to provide a method for mounting a pivoting door, window or shutter, which allows the position of the leaf to be adjusted with respect to the frame after having installed the glass pane.

[0030] A further purpose of the present finding is to provide a method for mounting a pivoting door, window or shutter, which allows the hinge to be installed on doors, windows or shutters having different dimensional characteristics and in particular anchoring recesses of different dimensions.

Brief description of the drawings

[0031] The technical characteristics of the invention, according to the aforementioned purposes, can be found in the content of the claims given below and the advantages thereof will become clearer in the following detailed description, made with reference to the attached drawings, which represent a non-limiting example embodiment thereof in which:

• figure 1 shows a first perspective view of a friction hinge for a pivoting door, window or shutter object of the present invention, mounted on a door, window or shutter, with a piece of fixed frame and a piece of movable leaf having been illustrated;
• figure 2 shows a second perspective view of the friction hinge of figure 1 with an inversion profile of the movable leaf having been removed to better highlight some characteristics of the friction hinge;
• figure 3 shows a perspective view of the side edge of a profile with a friction body of the friction hinge object of the present invention mounted;
• figure 4 shows a perspective view of the friction hinge object of the present invention as a whole associated with a section bar of the door, window or shutter and with the ironware for locking the leaf illustrated;
• figure 5 shows a perspective cross section view of the friction hinge object of the present invention, made according to a plane perpendicular to the longitudinal development of the movable leaf and of the fixed frame;
• figure 6 shows an enlarged detail of the cross section of the friction hinge with some parts removed to better highlight others;
• figure 7 shows an enlarged detail of the friction hinge object of the present invention relative to a plate and a counterplate coupled together;
• figure 8 shows an enlarged detail of the friction hinge object of the present invention relative to an eccentric element.

[0032] In accordance with the figures of the attached drawings, the friction hinge for pivoting doors, windows or shutters object of the present invention has been wholly indicated with 1.

[0033] The friction hinge 1 in object is intended to be used in a per sé conventional manner together with a second analogous friction hinge, to adjust the position of a movable leaf 3 on a fixed frame 2, with the movable leaf 3 being able to rotate between different positions about a rotation axis Y, horizontal or vertical, according to the different application requirements, and being able to be advantageously used usually to obtain a pivoting door, window or shutter such as a window, a skylight or a porthole.

[0034] The friction hinge 1 concerned is in particular intended for doors, windows or shutters consisting of metal section bars, generally made from aluminium, usually able to be obtained with extrusion processes.

[0035] In greater detail, the fixed frame 2 is mounted on the masonry wall of a building forming the support framework of the movable leaf 3 and it is arranged perimetrically delimiting the space used by the door, window or shutter. The fixed frame 2 is obtained with at least a first section bar 2' having an inner side 4 (i.e. facing towards the space used by the door, window or shutter) with a first anchoring cavity 5 formed, delimited by at least a first longitudinal tooth 6a for partially closing the opening exposed on the aforementioned inner side 4.

[0036] In turn, the movable leaf 3 is provided with at least a second section bar 3' having an outer side 7, i.e. facing towards the outside of the door, window or shutter, in a position substantially facing the first anchoring cavity 5, and with a second anchoring cavity 8 formed, delimited by at least a second longitudinal tooth 9, for partially closing the opening exposed on the aforementioned outer side 7.

[0037] The fixed frame 2 and the movable leaf 3 are also each provided, in a per sé totally conventional way, and for half of their perimeter extension, with at least an inversion section bar, respectively indicated with reference numerals 2" for the fixed frame 2 and with reference numeral 3" for the movable leaf 3, intended to go into abutment with the interposition of a gasket, respectively against the corresponding second section bar 3' of the leaf 3 and against the first section bar 2' of the frame2 to determine the sealed closing of the leaf 2 on the frame 3.

[0038] Each of the two friction hinges 1 of the pivoting door, window or shutter comprises a first friction body10, and a second friction body 11 pivotably mechanically coupled together in friction relationship and pressed against one another for example through a connection screw 130, adjustable in a per sé known way, to vary the friction force between the two friction bodies 10 and 11.

[0039] The first friction body 10 is susceptible of being held on the fixed frame 2 through first fastening means, generically indicated with reference numeral 13, which are mechanically engaged to the first anchoring cavity 5 of the first section bar 2' of the fixed frame 2 and are rigidly fixed to the first friction body 10. Similarly, the second friction body 11 is susceptible of being held on the movable leaf 3 through second fastening means, generically indicated with reference numeral 14, which are mechanically engaged to the second anchoring cavity 8 of the second section bar 3' of the movable leaf 3 and are rigidly fixed to the second friction body 11. According to the idea forming the basis of the present invention, at least one of the first and second fastening means 13, 14, and advantageously both of the fastening means 13, 14, comprises a plate 15, which is fixed to the respective inner or outer side of the corresponding first or second section bar 2', 3', and a counterplate 16, which is provided with an engagement portion 16' constrained by interference in the first or second recess 5, 8 of the corresponding first or second section bar2', 3' beneath the plate 15.

[0040] The aforementioned counterplate 16 is fixed to the corresponding first or second friction body10, 11 through at least a first screw 17, and advantageously through two screws 17, having the head 17' constrained to the relative friction body 10, 11, and the shaft 17" arranged to cross the through holes 22 formed on the two friction bodies 10, 11 and aligned with a first opening 18 formed in the plate 15 to manage to engage with the end in a first threaded hole 19 of the counterplate 16.

[0041] In greater detail, the screws 17 develop perpendicularly to the inner and outer sides 4, 7 respectively of the first and second section bar 2', 3', perpendicular to the prevalent development of the plate 15 and of the counterplate 16, and they have the shafts 17" that insert in the through holes 22 that are formed in two wings 100 of the two friction bodies 10, 11. The aforementioned wings 100 extend in a stepped fashion from a resting wall 10', 11' of the same friction bodies 10, 11 as explained hereafter.

[0042] Advantageously, the fastening means 13, 14 of the two friction bodies 10,11 are the same and therefore hereafter their components will be indicated indifferently and generically, i.e. without distinction through the adjectives first and second.

[0043] The longitudinal tooth 6, 9 of the anchoring cavity 5, 8 of the section bar 2', 3' (of the frame 2 and of the leaf 3) extends partially closing the recess 5, 8 and it is interposed between the counterplate 16 inserted in the recess 5, 8 and the resting wall 10', 11' of the relative friction body 10, 11 placed in contact with an outer front face 20 of the section bar 2', 3' (opposite the inner face of which from which the aforementioned longitudinal tooth 6, 9 extends).

[0044] Operatively, by clamping the first screws 17 by screwing, the counterplate 16 rigidly fixes to the relative friction body 10, 11 with the section bar 2', 3' of the frame 2 and of the leaf 3 interposed.

[0045] For this purpose, and in accordance with a preferred characteristic of the present invention, the engagement portion 16' of the counterplate 16 is equipped with a tilted wall 16", which when the first screws 17 are clamped, is compressed against the longitudinal tooth 6, 9 of the anchoring cavity 5, 8 of the relative section bar 2', 3' so that the aforementioned tilted wall 16 " slidably skids on the longitudinal tooth 6, 9 pulling the relative friction body 10, 11 with it until it is taken with its resting wall 10', 11' in abutment against the outer front face 20 of the section bar 2', 3' of the frame 2 or of the leaf 3 and with it clamping together the section bar 2', 3' itself, the friction body 10, 11, the plate 15 and the counterplate 16.

[0046] More clearly, in accordance with the preferred embodiment illustrated in the attached figures, each friction body 10, 11 is a metallic body shaped for example by extrusion and has the resting wall 10', 11', placed in abutment against the outer front wall 20 of the relative section bar 2', 3' on which it is mounted, and two wings 100, which extend perpendicularly from the resting wall 10', 11' above the anchoring cavity 5, 8 going to rest with a side face thereof 21 above the plate 15 keeping the through hole 22 aligned with the first opening18 formed on the same plate 15 to allow the insertion of the first screws 17.

[0047] Advantageously, the plate 15 defines a seat 24 for containing the counterplate16 through two opposite pairs of walls, two of which are side walls 25 and two are end walls 26.

[0048] Preferably, the plate 15 is made from metallic material, preferably steel, and it has an elongated shape in the direction of the anchoring cavity 5, 8 with the pair of side walls 25 obtained with two bends that at the ends define a resting edge 27 preferably in abutment on the inner side 4 or outer side 7 of the profile 2', 3' in particular above the two teeth 9, 9' that delimit the opening of the anchoring cavity 5, 8. For this purpose, the anchoring cavity 5, 8 has, in addition to the longitudinal tooth 9 for interference with the engagement portion 16' of the counterplate 16, also a second longitudinal tooth 9' opposite the longitudinal tooth 9 with respect to the opening of the recess 5, 8.

[0049] The two end walls 26 each have a second bend that delimits a fastening fin 28, parallel to the central portion of the plate 15, and intended to be fixed through second screws 29 onto the section bar 2', 3' at the anchoring cavity 5, 8 and advantageously on the bottom of the aforementioned recess.

[0050] Advantageously, the counterplate16 is provided with a first portion 30, which is inserted, in particular without clearance, in the containment seat 24 defined by the plate 15, and with a second portion 31 inserted with clearance in the anchoring cavity 5, 8.

[0051] In order to promote the sliding of the counterplate 16 with respect to the profile 2', 3' by means of the interference between the tilted wall 16" of the counterplate 16 and the longitudinal tooth 6, 9 of the anchoring cavity 5, 8, on the upper face 32 of the counterplate 16, preferably on the opposite side to that where the tilted wall 16" is foreseen, a projecting rib 33 is formed on which the inner face of the plate 15 rests.

[0052] In accordance with an advantageous characteristic of the present invention, the friction hinge 1 also comprises an eccentric element 34, which is provided with an enlarged head 35 inserted in a second shaped opening36 formed on the plate15 and with a shaft 37 fixed eccentrically to the head 35, and pivotably engaged in a second hole 38 formed in the counterplate 16, for this purpose being for example upset at the free end beyond the counterplate 16. In accordance with this advantageous embodiment, the first openings 18 are shaped like elongated slots in the direction parallel to the direction of development of the anchoring cavity 5, 8 whereas the second opening 36 is shaped like an elongated slot in the direction transversal to the direction of development of the anchoring cavity 5, 8. The enlarged head 35 of the eccentric element 34 is inserted without clearance into the second opening 36 in a direction longitudinally parallel to the anchoring cavity 5, 8 and it can slide in the second opening 36 in a direction transversal to the same anchoring cavity 5, 8. Operatively, by rotating the enlarged head 35 of the eccentric element 34 the head 35 itself slides in the direction transversal to the development of the anchoring cavity 5, 8 whereas its shaft slides in the longitudinal direction to the development of the anchoring cavity 5, 8 determining the sliding of the counterplate 16 to which the same shaft is engaged beneath the plate 15. Consequently, the movement of the counterplate 16 determines the movement of the friction body 10, 11 parallel to the anchoring cavity 5, 8 therefore allowing their adjustment in such a direction. An object of the present invention is also a method for mounting a pivoting door, window or shutter advantageously provided with a friction hinge 1 of the type described above.

[0053] Hereafter, for the sake of simplicity of presentation we will refer to the same nomenclature used up to now, even though it should be understood that the present method can also be used with hinges not provided with all of the characteristics considered above.

[0054] The method for mounting a pivoting door, window or shutter according to the present invention comprising a first step of fastening one of the two friction bodies 10, 11 to the respective section bar 2', 3' of fixed frame 2 or of the movable leaf 3. Such a first fastening step foresees a step of inserting the counterplate 16 inside the anchoring cavity 5, 8 of the section bar 2', 3' with the engagement portion 16' placed beneath the longitudinal tooth 6, 9; a step of mounting the counterplate 16 above the plate 15 and the friction body 10, 11 with its side face 21 resting above the plate 15.

[0055] In such a mounting step, the counterplate 16 inserts with its first portion 30 without clearance in the containment seat 24 defined by the plate 15 and with its second portion 31 with clearance in the anchoring cavity 5, 8.

[0056] Of course, the sequence of mounting steps of the three components one on top of the other can vary without for this reason departing from the scope of protection of the present patent document.

[0057] Such a mounting step therefore can also be carried out using section bars 2', 3' having anchoring recesses 5, 8 provided with different transversal width, keeping the clearance with which the second portion 31 of the counterplate 16 is inserted in the anchoring cavity 5, 8.

[0058] The first fastening step thus foresees a preliminary locking step of the friction body 10, 11 to the section bar 2', 3' through screwing of the first screw 17 into the first threaded hole19 of the counterplate 16.

[0059] Such screwing determines the compression of the engagement portion 16' of the counterplate 16 in abutment against the longitudinal tooth 6, 9 of the anchoring cavity 5, 8 of the section bar 2', 3' and the compression of the friction body 10, 11 against the section bar 2', 3'. In greater detail, during the aforementioned preliminary locking step following the clamping of the first screw17 (preferably there are two first screws 17), the engagement portion 16' of the counterplate 16 slides transversally to the longitudinal development direction of the anchoring cavity5, 8 with its tilted wall 16" that slides on the longitudinal tooth 6, 9 of the anchoring cavity 5, 8 of the section bar 2', 3' and until the resting wall 10', 11' of the corresponding friction body10, 11 comes into abutment against the outer front face 20 of the section bar 2', 3'.

[0060] Therefore, given that the friction body 10, 11 slides during its installation transversally with respect to the anchoring cavity 5, 8 until it meets the same section bar 2', 3', the method according to the invention makes it possible to mount the pivoting door, window or shutter through the aforementioned friction hinge 1, even in the presence of section bars 2', 3' having dimensions of the anchoring cavity 5, 8 and of its longitudinal tooth 6, 9 that are even substantially different.

[0061] The first fastening step thus foresees a final locking step of the friction body10, 11 to the section bar 2', 3' through fastening of the plate 15 to the same section bar 2', 3' through the use of at least a second screw 29 (and preferably two second screws 29).

[0062] Once the first fastening step is finished there is then a step of frontal insertion of the movable leaf 3 into the fixed frame 2 followed by a second step of fastening the other of the friction bodies 10, 11 to the respective section bar 2', 3' of the fixed frame 2 or of the movable leaf 3. Such a second fastening step can be operatively the same, mutatis mutandis, as the aforementioned first fastening step.

[0063] The method for mounting the pivoting door, window or shutter object of the present invention also preferably comprises a step of adjusting the longitudinal position of the friction hinge 1. Such an adjustment step comprises, for this purpose, a step of loosening the first screw17 in order to allow the relative sliding of the friction body 10, 11 above the plate 15; a subsequent step of setting the eccentric element 34 in rotation, determining the sliding of the counterplate 16 beneath the plate 15 and thus the movement of the relative friction body 10, 11 parallel to the anchoring cavity 5, 8 until a predetermined optimal closing position of the leaf 3 on the frame 2 is reached. During the sliding of the counterplate 16 beneath the plate 15, the first screw 17 slides in the first opening 18 shaped like an elongated slot formed in the plate 15 parallel to the anchoring cavity 5, 8.

[0064] With the subsequent step of clamping the first screw 17, the friction body 10, 11 is fixed in the predetermined position.

[0065] The finding thus conceived therefore achieves the predetermined purposes.

[0066] Of course, in its practical embodiment, it can also take on different shapes and configurations from the one illustrated above without for this reason departing from the present scope of protection. Moreover, all of the details can be replaced with technically equivalent elements and the shapes, sizes and materials used can be whatever according to the requirements.

Claims

1. Friction hinge for a pivoting door, window or shutter provided with a fixed frame (2), provided with at least a first section bar (2') having an inner side (4) with a first anchoring cavity (5) obtained inside it delimited by at least a first longitudinal tooth (6) and with a movable leaf (3), provided with at least a second section bar (3') having an outer side (7) with a second anchoring cavity (8) obtained inside it, also delimited by at least a second longitudinal tooth (9), said friction hinge (1) comprising:

- a first friction body (10) susceptible of being held on said fixed frame (2) through first fastening means (13) mechanically engaged to the first anchoring cavity (5) of said first section bar (2') and rigidly fastened to said first friction body (10);

- a second friction body (11) pivotably mechanically coupled to said first friction body (10) and susceptible of being fastened to said movable leaf (3) through second fastening means (14) mechanically engaged to the second anchoring cavity (8) of said second section bar (3') and rigidly fastened to said second friction body (11); characterised in that at least one of said first and second fastening means (13, 14) comprise:

- a plate (15) fastened to the respective inner or outer side (4, 7) of the corresponding first and second section bar (2', 3');

- and a counterplate (16) provided with an engagement portion (16') engaged by interference within the first or the second anchoring cavity (5, 8) of the corresponding first or second section bar (2', 3') beneath said plate (15) and fastened to the corresponding first or second friction body (10, 11) through at least a first screw (17) having the head (17') thereof constrained to said friction body (10, 11) and the shaft (17") passing through a first opening (18) of said plate (15) and engaged in a first threaded hole (19) of said counterplate (16).

2. Friction hinge according to claim 1, characterised in that the longitudinal tooth (6, 9) of the anchoring cavity (5, 8) of said section bar (2', 3') is interposed between said counterplate (16) and a resting wall (10', 11') of said friction body (10, 11).

3. Friction hinge according to claim 1, characterised in that said first screw (17) holds said counterplate (16) rigidly fastened to said friction body (10, 11), said section bar (2', 3') being interposed therebetween.

4. Friction hinge according to claim 3, characterised in that the engagement portion (16') of said counterplate (16) has a tilted wall (16") and in that said first screw (17) press the above-mentioned tilted wall (16") of said counterplate (16) in abutment against the longitudinal tooth (6, 9) of the anchoring cavity (5, 8) of said section bar (2', 3') and the resting wall (10', 11') of said friction body (10, 11) against said section bar (2', 3').

5. Friction hinge according to any one of claims 1 to 4, characterised in that said counterplate (16) is provided with a first portion (30) inserted, in particular without clearance, within a seat (24) for containing said plate (15) and a second portion (31) inserted with clearance within said anchoring cavity (5, 8).

6. Friction hinge according to any one of claims 1 to 5, characterised in that said first opening (18) is shaped as an elongated slot parallel to said anchoring cavity (5, 8); said hinge comprising an eccentric element (34) provided with an enlarged head (35) engaged in a second shaped opening (36) obtained on said plate (15) and a stem (37) pivotably engaged in a second hole (38) obtained in said counterplate (16); the rotation of said eccentric element (34) resulting in said counterplate (16) sliding beneath said plate (15) and subsequently in said friction body (10, 11) displacing parallel to said anchoring cavity (5, 8).

7. Friction hinge according to any one of claims 1 to 6, characterised in that said plate (15) defines a seat (24) for containing said counterplate, in particular through pairs of walls arranged opposite to one another (25, 26), and it is provided with two end fins (28) intended to be fastened through second screws (29) on the section bar (2', 3') at said anchoring cavity (5, 8).

8. Method for mounting a pivoting door, window or shutter provided with a hinge according to claim 1, comprising the following operational steps:

- a first step of fastening one of said first and second friction body to the respective section bar of fixed frame or movable leaf by:

- a step of inserting said counterplate within the anchoring cavity of said section bar, the engagement portion being arranged beneath said longitudinal tooth;

- a step of mounting said counterplate above said plate and said friction body above said plate;

- a step of preliminarily locking said friction body to said section bar through screwing said first through screw constrained with the head thereof to said friction body, in the first threaded hole of said counterplate; said screwing resulting in the engagement portion of said counterplate being pressed in abutment against the longitudinal tooth of the anchoring cavity of said section bar and in said friction body being pressed against said section bar;

- a step of finally locking said friction body to said section bar through fastening said plate to said section bar with at least a second screw;

- a step of frontally inserting said leaf in said frame;

- a second step of fastening the other of said first and second friction body to the respective section bar of fixed frame or movable leaf.

9. Method for mounting a pivoting door, window or shutter according to claim 8, characterised in that, during said step of preliminary locking, the engagement portion of said counterplate slides transversally with respect to the longitudinal development direction of said anchoring cavity a wall thereof being tilted against the longitudinal tooth of the anchoring cavity of said section bar until said one resting wall of said friction body goes in abutment against said section bar.

10. Method for mounting a pivoting door, window or shutter according to claim 8 or 9, characterised in that it comprises a step of adjusting the longitudinal position of said hinge by:

- a step of loosening said first screw;

- a step of rotatably actuating an eccentric element provided with an enlarged head inserted without clearance in a second opening obtained on said plate and a stem fastened in an eccentric manner to the head and pivotably engaged in a second threaded hole obtained in said counterplate; the rotation of said head resulting in said counterplate sliding beneath said plate and subsequently in said friction body displacing parallel to said anchoring cavity until reaching a predetermined position, said first screw sliding within a first opening shaped as an elongated slot obtained in said plate parallel to said anchoring cavity;

- a step of tightening said first screw, the friction body being in said predetermined position.

Drawing