Adjustable concealed hinge for windows with a projecting sash

Abstract

The present invention relates to the field of windows and doors and, in particular, to a concealed hinge for a window with a projecting sash provided with an advantageous adjustment system.

Description

[0001] TITLE

[0002] ADJUSTABLE CONCEALED HINGE FOR WINDOWS WITH A PROJECTING SASH

[0003] DESCRIPTION

[0004] Technical sector of the invention

[0005] The present invention relates to the field of windows and doors and more specifically to an adjustable concealed hinge for a window with a projecting sash.

[0006] Background of the invention

[0007] This type of hinge can be used on windows that generally project outwards, with the movable sash pivoted at the level of its upper transom and the corresponding upper transom of the fixed frame. The hinge elements are configured to be positioned and connected inside the profiles that form the fixed frame and the movable sash, i.e. not visible when the window is closed. There are numerous types of hinges of this type, but these often have drawbacks due to their excessive bulk, and above all adjustment and assembly difficulties, drawbacks that have been reduced or eliminated with the hinge according to the present invention.

[0008] Patent publications W02008 / 065510 and GB2262152 relate to known projecting hinges with limited adjustability functional to the movement of a single lower pivot point.

[0009] Summary of the invention

[0010] In fact, the object of the present invention is to provide a concealed hinge for windows with projecting sashes which allows, in particular, effective adjustment without at the same time entailing structural complications or penalising reliability and precision of operation, and on the contrary being simple both in terms of construction and operation, i.e. assembly operations.

[0011] These and other objects are achieved by the adjustable concealed hinge for projecting sashes which, according to the present invention, has the essential features defined by the first of the appended claims.

[0012] Further important characteristics are defined by the dependent claims.

[0013] Short description of the drawings

[0014] The characteristics and advantages of the adjustable concealed hinge for windows with a projecting sash according to the present invention will appear more clearly from the following description of the embodiments thereof, provided by way of non-limiting example with reference to the appended drawings wherein:

[0015] Figure 1 shows an axonometric view of a window, with an open sash, fitted with hinges according to the invention, the fixed frame and the window sash being shown in transparency;

[0016] Figure 2 is a cross-sectional view of the window in Figure 1 , with the sash closed, limited to a hinge mounting area, led in the plane of the fixed frame and sectioning the hinge in the longitudinal direction;

[0017] Figure 2a represents, enlarged, the region enclosed by the circle A in Figure 2;

[0018] Figure 3 is a cross-sectional view of the window area in Figure 2, with parts omitted for illustrative clarity, led according to plane Ill-Ill of the aforementioned figure;

[0019] Figure 4 is a sectional view according to plane IV-IV in Figure 2; and Figure 5 shows an exploded axonometric view of the hinge.

[0020] Detailed description of the invention

[0021] With reference to these figures, and in particular Figure 1 , a window 1 with a projecting sash, according to a known configuration, comprises a fixed frame 11 to which a movable sash 12 is pivotally connected, both, in the most typical configuration, rectangular in shape. In particular, the movable sash 12 is hinged on respective first and second mullions 12a, 12b, to a first vertical mullion 11 a and to a second vertical mullion 11 b of the fixed frame by means of respective hinges altogether indicated as C; with respect to the fixed frame, therefore, the sash has an opening / closing movement projecting towards an outer side of the frame, in roto-translation according to a movable horizontal axis defined between the two hinges and substantially running along an upper transom 11c of the frame itself, and an upper transom 12c of the sash 12.

[0022] Each hinge C comprises a support bar 2 fixedly anchored, as will be seen shortly, to the respective mullion 11 a, 11 b, of the fixed frame 11 of the window 1 . The fixed bar 2 supports an adjustment bar 3, superimposed on the fixed bar 2, with the possibility of sliding, along its longitudinal direction, corresponding to that of the mullion, and thus in this case in the direction of the height. The adjustment bar 3 is thus smoothly supported by the fixed bar along an axis Y that can be regarded as their common longitudinal axis. For this purpose, a hole 21 is drilled at the lower end of the fixed support rod to receive a freely rotatable shank 23a of an actuating knob 23 whose enlarged head 23b protrudes externally and is in a contact and thrust relationship with the lower end of the adjustment bar 3. The head 23b has a cam profile, e.g. circular, eccentric with respect to the axis of the shank 3, and has a seat 23c for engaging a key to promote rotation of the button about the axis of the eccentric shank 23a, and thus the adjustment thrust on the bar 3.

[0023] A finger-shaped upper end 24 of the fixed support bar 2 is adapted to rest on the upper transom 11c of the fixed frame. The mounting of the adjustment bar 3 to the fixed support bar 2 is achieved by means of a plurality of first bushings 32, e.g. two, which have their respective tangs 33 engaged in slots 34 spaced along the adjustment bar 3. As made clear by Figure 2a, each first bushing provides, in addition to an enlarged head 35 for axial sealing against the adjustment rod, in further coaxial projection with respect to the first tang 33 engaged in the slot 34, a second, narrower tang 36 which is riveted on a corresponding hole 22 obtained on the fixed bar 2. Fixing to the mullion 11 a, or 11b thus takes place by means of screws 25 which, introduced into the aforementioned bushings 32, go through the two bars through slots 34 and holes 22, to tap into the mullion. The slots 34, extending lengthwise, guide and stop the stroke of the bushings 32, and thus of the adjustment bar 3, in its adjustment slide. A third locking screw 27, located at the lower end of the assembly of fixed bar 2 and adjustment bar 3, serves to lock the two rods reciprocally in the desired adjustment position, and for this purpose operates in clamping by passing the rods through a hole 28 (on the fixed bar 2), and a further locking slot 37 (on the adjustment bar, to allow the movement thereof).

[0024] At an upper end, there is a shaped opening 4 on the adjustment bar 3 for the articulated connection with a movable bar 5, which is fixed to a mullion (in this case the first mullion 12a is the one illustrated) of the projecting sash 12 by means of screws 51 , 53. The curved shaped opening 4 guides and supports a first upper rotation pin 41 which, passing through the opening freely with respect to both translation and rotation about its own axis, is fixed by riveting to an upper end of the movable bar 5. In practice, the first pin 41 defines with its axis X the fulcrum of rotation of the hinge, this axis being orthogonal to the lying planes of the various bars, all of which are predominantly planar in extension.

[0025] The shaped opening 4 is preferably shaped with a raised edge 4a in order to have a larger bearing surface for the first pin 41 to prevent wear over time. In addition, a notch 3a is formed in the upper end zone of the adjustment bar 3, bent with respect to the plane of the bar and shaped to fit inside a groove 11e present along the mullion 11a of the fixed frame 11 to ensure the tightness of the hinge during opening (see Figures 1 and 4).

[0026] A connecting rod 6 then extends rotatable between the adjustment bar 3 and the movable bar 5, being articulated to these elements in their substantially intermediate positions. For this purpose, second pins 61 , 62 are used, which rotatably support the respective ends of the connecting rod 6 and are locked in seats 31 , 56 obtained in the intermediate position on the adjustment bar 3 and movable bar 5 respectively. In order not to mechanically interfere with the fixed bar 2, the head of the pin 61 locked in the seat 31 of the movable bar is housed in a slot 26 on the fixed bar, a slot which allows the adjustment movement described above.

[0027] In the opening movement, the concomitant action of the connecting rod 6 and the possibility of displacement of the first rotation pin 41 along the curved opening 4 generates a frontal and vertical displacement of the movable sash 12 with respect to the fixed frame 11 , effectively moving the sash away from the frame, thus allowing it to rotate.

[0028] The movable bar 5 still has two protruding portions 51a, i.e. elevated in relation to the plane of the bar, e.g. and preferably in correspondence with the holes for insertion of the screws 51 for attachment to the sash, which are adapted to fit into longitudinal fins 12d and 12e running along the mullion 12a (or 12b) of the sash (Figure 4). This engagement ensures the correct positioning, in a transverse direction, of the movable bar 5 in relation to the projecting sash 12. Finally, the movable bar 5, at its upper end, forms a fin 52a bent at 90° with respect to the plane of the bar, defining a first abutment face orthogonal to the longitudinal axis Y’ of the bar, which is adapted to abut on the upper transom 12c of the movable sash 12, for precise mounting reference in a vertical direction. The same upper end forms by bending with respect to the plane of the bar, an appendage 52b which provides a second abutment face inclined with respect to the longitudinal axis of the bar, adapted to abut on a surface 7a correspondingly inclined, a support block 7, shaped for the purpose and arranged for fixing, for example by interlocking, on a groove 11 d provided on the upper transom 11 c of the fixed frame 1 1 , as a precise stop in the closed position. The support block 7 is advantageously provided in a kit together with the hinge.

[0029] Depending on the construction characteristics of the window, it may not be possible to fasten one of the screws securing the movable bar 5 to the sash, namely the screw 53 arranged in a higher region. In this case, advantageously, the fastening can be perfected by simply rotating a shaped plate 54 arranged on the face of the bar 5 facing the movable sash, to actuate a second bushing 55 which passes through and rotates in the passage hole 57 for the screw 53. The plate is fixed, for example, by riveting to the end of the bushing that projects on the said face, while an enlarged head of the bushing 55 is placed on the other face of the bar, i.e. the one facing the assembly of fixed bar 2 and adjustment bar 3. This head is provided with an engagement seat for a key, e.g. a hex key, suitable for operating the rotation, as a result of which the plate can, depending on the angle assumed, engage and be locked inside the fins 12d and 12e of the mullion 12a of the movable sash 12. Typically, the plate 54 has an elongated shape, so that in a position aligned with the channel delimited by the fins it can fit into it, whereas in a position rotated by approximately 90° it is stopped within it by abutment on the fins.

[0030] In use, the hinge according to the invention offers in particular the advantageous possibility of adjusting the reciprocal position between the fixed frame and the movable sash, both in order to achieve perfect symmetry between the right and left hinge, and for the correct compression of the seal provided between the frame and the movable sash. This adjustment is carried out by acting on the cam adjustment button 23. Since the head 23b is eccentric with respect to the axis of the permitted rotation (that of the shank 23a), the rotation causes the bar 3, which rests on the surface of the cam- profiled head, to be pushed up or down, and consequently the lifting and lowering of the movable sash 12 with respect to the fixed frame 1 1 . This allows independent adjustment on the right and left hinge; said adjustment also optimises the contrast position between the appendage 52b and the abutment 7, effectively adjusting the compression of the sealing gasket. After adjustment, the position is fixed by tightening the screw 27. Contrary to known solutions such as those mentioned in the introductory part, according to the present invention there is ultimately a translation of the entire articulated assembly integral with the movable sash (with consequent raising and lowering adjustment of the movable sash itself).

[0031] The mullion fastening referred to above, although typical, is to be considered purely by way of example, the hinge according to the invention being configured to fit other window configurations, where functionally appropriate, with fastening generally to the appropriate profile of the fixed frame and movable sash. In this sense, the terms lower and upper used in this description should be understood in relation to the most typical assembly, and not in an absolute sense. The present invention has been described hereto with reference to preferred embodiments thereof. It is intended that other embodiments may exist which relate to the same inventive core, all falling within the scope of protection of the claims indicated below.

Claims

CLAIMS1. A hinge for opening / closing a window, the frame comprising a fixed frame (11) and a movable sash (12), the hinge comprising a fixed bar (2) extending in a predominantly planar manner configured for fastening to a profile (11a) of the fixed frame; a movable bar (5) also of planar shape configured for fastening to a profile (12a) of the movable sash and articulated in superposition with respect to the fixed bar (2) by means of roto-translation means (4, 41 , 6) adapted to provide a fulcrum of rotation between the bars according to an axis (X) orthogonal to the plane thereof and a translation in reciprocal distancing thereof on said plane, characterised in that said roto-translation means (4, 41 , 6) are operatively connected exclusively between said movable bar (5) and an adjustment bar (3) superimposed on said fixed bar (2) and slidingly supported thereby along a common longitudinal axis (Y), actuating means (23) being further provided, operatively arranged between said fixed bar (2) and said adjustment bar (3) adapted to be actuated to control the position of said adjustment bar (3) with respect to said fixed bar (2) along said longitudinal axis (Y), whereby the movement of said adjustment bar (3) responds to the translation of said roto-translation means integral with the movable sash (12) with consequent adjustment in raising and lowering of the movable sash (12) with respect to the fixed frame (11).

2. The hinge according to claim 1 , wherein said adjustment bar (3) has in one end zone a notch (3a) bent with respect to the plane of the bar itself and configured to engage within a groove (11 e) provided on said fixed frame (11) to ensure the tightness of the hinge during the opening thereof.

3. The hinge according to claim 2, wherein said notch (3a) is provided at an upper end of the adjustment bar (3), said groove (11 e) being provided along a mullion (11 a) of the fixed frame (11 ).

4. The hinge according to any one of the preceding claims, wherein said movable bar (5) has at one end a fin (52a) bent at 90° with respect to the plane of the bar itself defining a first abutment face orthogonal to a longitudinal axis (Y’) of the movable bar (5), which is adapted to abut by mounting reference on said movable sash (12).

5. The hinge according to claim 4, wherein said fin (52a) is obtained at an upper end of said movable bar (5), and is adapted to abut on an upper transom (12c) of saidmovable sash (12).

6. The hinge according to any one of the preceding claims, wherein one end of said movable bar (5) forms, by bending with respect to the plane of the bar, an appendage (52b) which provides a second inclined abutment face with respect to the longitudinal axis (Y’) of the movable bar, said second inclined abutment face being adapted to abut on a surface (7a), correspondingly inclined, of a support block (7) arranged to be fixed within a groove (11d) provided on said fixed frame (11 ), for stopping in the closed position of the hinge.

7. The hinge according to claim 6, wherein said appendage (52b) is obtained at an upper end of said movable bar (5), said block (7) being arranged for fastening in said groove (11d) provided on an upper transom (11c) of said fixed frame (11).

8. The hinge according to claim 6 or 7, wherein said support block is supplied in a kit together with the hinge.

9. The hinge according to any one of the preceding claims, wherein said actuating means comprise an actuating button (23) rotatably mounted on said fixed bar (21 ) and provided with a head (23b) eccentric with respect to the axis of rotation, which is adapted to contact and push through a cam profile thereof with one end of said adjustment bar (3).

10. The hinge according to claim 9, wherein said head (23b) of said actuating button is provided with a seat (23c) for engaging an actuating key.11 . The hinge according to any one of the preceding claims, wherein said adjustment bar (3) and said fixed support bar (2) are connected by means of a plurality of first bushings (32) having respective first tangs (33) engaged in slots (34) obtained in a spaced-out manner and longitudinally extending along said adjustment bar (3), each first bushing (32) providing, in addition to an enlarged head (35) for axial sealing in abutment on said adjustment bar (33), in further coaxial projection with respect to said first tang (33) engaged in the slot (34), a second, narrower tang (36) riveted to a corresponding hole (22) obtained on said fixed bar (2), screws (25) also being provided adapted to be introduced into said first bushings (32) for fixing the assembly of the fixed bar (2) and adjustment bar (3) to said fixed frame (11).

12. The hinge according to any one of the preceding claims, comprising means (27,28) for reciprocally locking said adjustment bar (3) with respect to said fixed support bar (2) in a desired position.

13. The hinge according to claim 12, wherein said locking means comprise a locking screw (27), adapted to operate in clamping by passing the bars through a hole (28) on said fixed bar (2), and a clamping slot (37) on said adjustment bar (3).

14. The hinge according to any one of the preceding claims, wherein said fixed support bar (2) has a finger-shaped end (24) adapted to abut on said fixed frame (11).

15. The hinge according to any one of the preceding claims, wherein said movable bar (5) is configured for fastening to said movable sash (12) by means of a plurality of screws (51 , 53), a shaped plate (54) arranged on a face of said movable bar (5) facing said movable sash, rotatable by actuation of a second bushing (55) passing through and rotating in a passage hole (57) of said at least one of said screws (53) being further provided for possible replacement of said at least one of said screws (53).

16. The hinge according to claim 15, wherein said shaped plate (54) is fastened to an end of said second bushing (55) projecting on said face facing the movable sash of said movable bar (5), whereas an enlarged head of said second bushing (55), provided with an engagement seat for an actuating key is arranged on a face of said movable bar (5) facing the assembly of the fixed bar (2) and adjustment bar (3), whereby, depending on the angle assumed, said plate is adapted to engage and be locked inside fins (12d, 12e) of the mullion (12a) of the movable sash (12).

17. The hinge according to claim 16, wherein said shaped plate (54) has an elongated shape, so that in a position aligned with a channel delimited by said fins (12d, 12e) it can be introduced into it, while in a position rotated by about 90° it is stopped within it by abutment on said fins (12d, 12e).

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