TITLE

FRAME STRUCTURE FOR DOORS OR WINDOWS, FOR FURNITURE OR FOR LIGHTINGS, HAVING A SURFACE ON A SAME PLANE OF A WALL

DESCRIPTION Field of the invention

The present invention relates to the field of doors or windows, furniture and lightings having a surface on a same plane of a wall. In particular, the present invention relates to a frame structure for doors or windows made of extruded profiles for receiving leaf panels having a surface on a same plane of a wall, said frame being adapted to be incorporated in the wall made of bricks or of boards, for example plasterboard.

Description of the technical problem Among the structures of frames for doors or windows having a surface on a same plane of a wall, frames are known defining an aperture for a door in a wall, wherein the frame is embedded within the wall same. Normally, such frames have uprights and crosspieces assembled separately before being mounted in the wall, obtaining a high quality and geometric precision when matching with the leaf panels. The installation of the above described frames provides the step of arranging the frame, previously assembled, within the wall at the aperture, fixing the frame in the wall and then stuccoing and finishing the side slits between frame and wall.

In particular, an Italian utility model, application N°VI2001U000007 , describes a frame for doors or windows with a concealed hinge having a surface on a same plane of a wall with one or two pull leaves, having uprights and crosspieces formed with a same profiled element. This profiled element has a box-like substantially rectangular cross section having a substantially triangular protrusion consisting of a first edge perpendicular to a side of the leaf, and a second edge oblique with respect to said first edge, said second oblique edge remaining embedded in the wall .

Such profiled element has the drawback that said oblique edge obstructs the arrangement of a board-wall,

for example of plasterboard, thus requiring further work for cutting at an angle the end of the board to match the oblique edge of the profiled element, in such a way that a significant additional working and installation time results, with subsequent higher costs for manual work.

Furthermore, an Italian utility model, application N°BO97U000098, describes a frame structure for doors or windows with concealed hinges and frame having a surface on a same plane of a wall with one or two pull leaves, wherein this frame is obtained with a first extruded profile with shoulders for a second complementary profile suitable for completing to cover the remaining part of the thickness of the wall, at the aperture of the wall. Even in this case the profile that forms the above described frame structure is shaped with concealed edges with oblique face adapted to be overlapped by plaster close to the aperture.

Therefore, also in this case, the known frame structure has the drawback that the concealed edge having oblique faces blocks the arrangement of a board-wall, causing the technical problem of cutting the boards at the aperture of the wall.

Similarly, Italian utility model N°BO97U000097 describes a frame structure for doors or windows with concealed hinges and frame having a surface on a same plane of a wall with one or two push leaves, comprising a first extruded profile with a shoulder associated to a second complementary profile suitable for completing to cover the remaining part of the thickness of the wall, at the aperture of the wall. Even in this case the above described first and second profile has an edge with an oblique face, having the same drawbacks as already described.

Summary of the invention It is then a feature of the present invention to provide a frame structure for doors or windows for receiving at least one closure panel with at least one face having a surface on a same plane of a board or a wall, wherein said frame is operatively incorporated in

said board or wall, where in case of boards the shape of the frame does not require to cut the boards.

Another feature of the present invention is to provide a frame structure for doors or windows adapted to fill modularly the thickness of the wall at the aperture in the wall .

A further feature of the present invention is to provide a frame structure for doors or windows of modular type, implemented at a desired thickness of the wall, which allows obtaining a high finishing quality, and with very low installation time and cost.

It is still a feature of the invention to provide a frame structure for closure wings having a surface on a same plane of a wall, adapted to be used to form a built- in wardrobe or to close a space.

Another feature of the invention is to provide a frame structure for a closure panel having a surface on a same plane of a fixed wall suitable to form a lighting that has a surface on a same plane of the wall, or of a board or a glass.

Another feature of the invention is to provide a frame structure having a surface on a same plane of a wall adapted to receive an edge of a sheet or a glass completely concealed under a ground or ceiling surface. Another feature of the invention is to provide a frame structure for a closure panel having a surface on a same plane of a wall forming an upper crosspiece without shoulder for doors having a central pivot.

These and other objects are achieved by a frame structure for doors and windows, for furniture or for lightings, having a surface on a same plane of a wall for receiving at least one fixed or mobile closure panel, said frame being adapted to be incorporated in a board-wall or in a brick-wall, said frame defining an aperture where said closure panel engages, said closure panel having at least one side having a surface on a same plane of said wall, characterised in that said frame is made starting from a main section having a first face at the same side of said aperture and a second face opposite to said

aperture, and two side faces substantially parallel to said wall, from at least one of said side faces a support wing protruding at right angles.

In particular, the main section is solid or hollow and can be obtained by extrusion, by metal structural work, or it is a composite section with said support wing embedded in a matrix for example of wood, resin, etc., or it can be also obtained with several assembled elements, for example with screws . In particular, said closure panel is selected from the group comprised of:

- at least one leaf panel;

- at least one sliding panel;

- a bellows like closure , - a leaf panel with internal pivot,

- a fixed panel.

In particular, said closure panel is obtained with a material selected from the group comprised of:

- an opaque material; - a transparent material.

This way, if the closure panel is of a transparent material, the frame allows to obtain a lighting simply arranging behind the closure panel a light source, in particular in a recess obtained at the above described aperture wall. Also, if the transparent material is a glass wall, fixed windows can be obtained.

In a preferred exemplary embodiment, from each of said two side faces a wing protrudes at right angles, each wing belonging to a respective plane parallel to said first face.

Advantageously, said or each wing at right angles has a knurled inner surface, adapted to keep said frame adherent to a board of said board-wall, for example a sheet of plasterboard, or to the plaster of a brick-wall. In particular, said first face of the main section can have a thicker portion, having a width substantially equal to the thickness of said closure wing, adapted to allow applying self-threading screws and to provide an enough thick layer for said screws.

Said thicker portion of said first face can be solid or have inner chambers for lightening the section.

Advantageously, said frame comprises at least one concealed hinge that can be fixed between said thicker portion of said first face and said closure wing, said hinge remaining hidden when said closure panel is in closed position.

Advantageously, at least one of said two side faces of said main section is knurled outside. Advantageously, said or each wing at right angles ends with a protrusion oriented in an opposite direction with respect to said aperture. This protrusion has the function of forming an edge between said wall and said aperture.

Advantageously, said main section is associated to a complementary section suitable for completing to cover the whole thickness of said wall at said aperture, said complementary section having:

- a reference face operatively parallel to one of said side faces of said main section; - an outer face adapted to remain visible in said aperture and substantially aligned to the first face of the main section, lengthening it of a desired length;

- an engagement portion for positively engaging said wing with said main section.

In a particular exemplary embodiment, said frame comprises uprights and crosspieces obtained with said main section, said uprights and crosspieces being united to each other at an angle, in particular, at 90°, by means of a connecting element.

Said connecting element comprises advantageously a first and a second portion, said first and second portion being connected at an end thereof, in particular at right angles . Advantageously, said first and second portion of said connecting element have a substantially rectangular cross section.

Advantageously, said extruded main section comprises an a guiding groove adapted to house said first or said

second portion of said connecting element.

In particular, said groove is in said extruded main section.

In particular, said groove has a substantially rectangular cross section with an opening at a side.

Advantageously, said main section comprises a shoulder portion for said at least one closure panel.

Advantageously, said main section comprises a groove arranged near said shoulder portion, said groove being adapted to house a seal between said frame and said closure panel when said closure panel is in a closed position.

In a particular exemplary embodiment, said main section comprises a tubular portion adapted to house an adjustable shoe capable of adjusting the position in height of the frame once located in said aperture.

In particular, said tubular portion is adapted to house an adjustable shoe and is arranged within said main profile . In particular, said tubular portion adapted to house an adjustable shoe has an open circular cross section.

In a particular exemplary embodiment, said main section extends along a curvilinear axis.

Advantageously, said complementary section comprises a complementary wing, extending in a way coplanar with respect to said outer face opposite to said reference face, said complementary wing having a shape equal to said wing at right angles of said main section.

In particular, said engagement portion of said complementary section is conformed in order to reproduce in negative the shape of said wing at right angles of said main section, said engagement portion being adapted to coupling as a dap joint with said wing at square angles.

In particular, said reference face has a notch in intermediate position, adapted to assist cutting an exceeding portion, if required.

In particular, said complementary section has cross section open.

Advantageously, said complementary section comprises a

first support portion perpendicular to said complementary wing opposite to said outer face.

Advantageously, said complementary section comprises a second support portion parallel to said first support portion and distant from said reference face of a length substantially equal to the width of said wing at right angles of said main section.

Advantageously, said complementary section comprises a complementary protrusion that protrudes opposite to said outer face at a distance from said second support portion, equal to the width of said wing at right angles of said main section or of said complementary section. The presence of this protrusion allows cutting the complementary section immediately after this protrusion with respect to the above described reference face, providing a secondary wing protruding at right angles from said second support portion, said secondary wing resulting equal to said complementary wing.

Advantageously, the inner surface opposite to said outer face of said complementary section is knurled.

Advantageously, the surface of said first and/or second support portion, oriented outwards from said reference face, is knurled.

In particular, said main section and said complementary section are obtained in extruded of aluminium.

Advantageously, said or each support wing embedded in said matrix is obtained with at least one metal profile element having a protruding portion forming said wing at right angles and a root portion put in said matrix, or, alternatively, with a metal profile element having two protruding portions forming respective wings at right angles and a fastening portion embedded in said matrix.

In a possible exemplary embodiment, said first face of said main section is plane and said or each support wing extends as an extension from said first face. Such type of main section can be used as crosspiece of the frame structure of a door of the type with a pivot in the middle, where the axis of rotation of the pivot does not coincide with an edge of the door and remains parallel to

the same. The uprights, instead, have to be one with a pull-type shoulder and one with a push-type shoulder to allow the rotation of the door about its axis. Furthermore, such a section can be used to be arranged as an aperture on a wall on a ground or a ceiling surface, creating a crosspiece on one or several sides of the aperture.

Advantageously, said structure comprises fastening means for the closure panel in said main section on said first face, in particular, said fastening means comprises a sheet holding section that can be operatively fixed to said main section. This is the case of a fixed closure panel, such as the glass sheet of a glass wall. In this case the glass sheet is inserted abutting on a shoulder protruding from the section according to the invention that form the frame and then blocked by such a sheet holding section.

Advantageously, said first face at the same side of said aperture comprises a removable section having means for coupling to said structure, in particular, to said main section and to said sheet holding section, said main removable section allowing to access, when removed, to said main section for assembling the closure panel. This removable section can be connected to the frame structure after having connected the sheet holding section, for example a first end thereof can be connected to the sheet holding section and a second end to the main section.

In particular, said means for hanging can snap fit, magnetic, screw engagement, etc. Advantageously, said structure comprises an additional section adapted to be incorporated in a ground, in a ceiling or in a board-wall or a brick-wall, said additional section having a face oriented towards said sheet and two side faces, said additional section having: - a housing on said face oriented towards said sheet, adapted to contain an edge of said sheet;

- means for keeping said sheet in said housing;

- at least one support wing protruding at right angles from said face oriented towards said

sheet, on an extension of said housing. In particular, said means for keeping said sheet comprise a clamping portion having:

- at least one jaw member movable between an open position and a closed position, wherein in said closed position said clamping portion clamps said sheet;

- means for operating from the outside said or each jaw member. In particular, said means for operating comprise a transmission screw having perpendicular axes.

Advantageously, said jaw member comprises at least one protruding portion engageable in a corresponding recess obtained in said sheet. According to another aspect of the present invention, the above described objects are achieved by a frame structure for doors and windows, for furniture or for lightings, having a surface on a same plane of a wall, suitable for receiving at least one fixed closure panel, said frame being adapted to be incorporated in a ground, in a ceiling or in a board-wall or a brick-wall, said frame defining an aperture where said closure panel engages, said frame being obtained starting from a main section having a face oriented towards said closure panel and two side faces, characterised in that it comprises:

- a housing on said face oriented towards said sheet, adapted to contain an edge of said sheet;

- means for keeping said sheet in said housing; - at least one support wing protruding at right angles from said face oriented towards said sheet, on an extension of said housing. Brief description of the drawings

The invention will be made clearer with the description of some exemplary embodiments, exemplifying but not limitative, with reference to the attached drawings wherein:

- Figure 1 shows a cross sectional view of a main section of a frame for a push-type closure panel;

- Figure 2 shows a cross sectional view of a main section of a frame for a closure with pull-type leaf;

- Figure 3 shows a cross sectional view of a complementary section; - Figures 4 and 5 show a cross section made with a horizontal plane respectively on two embodiments of the present invention to a push-type door comprising respectively a frame formed by a main section and a frame formed by a main section and a complementary section;

- Figures from 6 to 9 show respectively alternative embodiments suitable for assembling a frame according to the invention for a push-type closure panel;

- Figures 10 and 11 show a cross section made with a horizontal plane respectively two embodiments of the present invention for a pull-type leaf comprising respectively a frame formed by a main section and a frame formed by a main section and a complementary section; - Figures from 12 to the 15 show respectively alternative embodiments of assembling steps of a frame according to the invention for a closure with a pull-type leaf;

- Figure 16 shows a cross sectional view of a main section of a frame according to the invention for a closure panel of a built-in wardrobe;

- Figure 17 shows a cross section made with a horizontal plane of an application of such a frame to a built-in wardrobe; - Figure 18 shows a cross section made with a vertical plane of such a frame, before being assembled;

- Figure 19 shows a cross section made with a horizontal plane of an application of such a frame for a lighting having a surface on a same plane of a wall;

- Figures from 20 to 23 show an exemplary embodiment of the section according to the invention, in an embodiment providing a composite section with the or each wing embedded in a matrix;

- Figure 24 shows an alternative exemplary embodiment of a main section for a pull-type door;

- Figures 25, 26 and 27 show the assembling steps of such a main section in a board-wall or brick-wall for example forming a frame for doors of a built-in wardrobe;

- Figure 28 shows a further exemplary embodiment of a main section according to the invention forming a frame for a closure panel or fixed panel, for example a glass wall;

- Figures 29 and 30 show respectively a sheet holding section and a removable section for such a main section;

- Figure 31 shows a cross sectional view of an exemplary assembling step of such a section for fixed panels in a board-wall;

- Figures from 32 to the 35 show a succession of assembling steps of such a section for fixed panels;

- Figure 36 shows an additional section adapted to be integrated under a ground or ceiling surface or in a wall, having a housing for a closure panel and at least one support wing according to the invention;

- Figure 37 shows an jaw member capable of blocking the closure panel when it is put in the housing; - Figures 38 and 39 show respectively a cross sectional and a perspective view of an exemplary assembling step of such an additional section;

- Figure 40 shows an exemplary assembling step of a glass sheet using the same section for fixed sheets both for lower edge that for upper edge of the sheet;

- Figure 41 shows, instead, an exemplary assembling step of the sheet by an additional section concealed under the ground for housing a lower edge of the sheet and a section for fixed sheets for the upper edge;

- Figure 42 shows an example of the main section according to the invention where the face of the edge of the aperture is plane;

- Figures 43 and 44 show a cross sectional view of a

main section respectively for uprights of a push-type door and for uprights of a pull-type door; - Figure 45 shows a cross sectional view of an assembling step for doors rotating about a median hinge in a frame structure obtained with an upright for a pull-type door and an upright for a push-type door.

Description of preferred exemplary embodiments In the following description an example will be illustrated of a frame structure for doors or windows for receiving at least one closure wing, said frame being adapted to be incorporated in a board-wall or in a brick- wall, said frame defining an aperture where said closure panel engages, said closure panel having at least one side having a surface on a same plane of said wall.

The frame is obtained starting from a main section 1,

2 or 3, for example an extruded profile of aluminium, with one or more chambers, as described respectively in figures

1, 2 and 16, having a first face 31 from the side of the above described aperture and a second opposite face 30, two side faces 15 and 16 substantially parallel to the above described wall, from at least one of said side faces

15 and 16 a support wing 17 protruding at right angles that ends with a protrusion 18, suitable to form an edge about said aperture.

In the examples shown the section 3 of figure 16 has a single support wing 17, whereas the profiles 1 and 2 (figure 1 and 2) have two support wings 17, which can also have different length from each other. The above described main section 1, 2 or 3 comprises a inner guide groove 20, adapted to house a connecting element 87, shown in figure 18, for two adjacent portions of the above described section 1, 2 or 3, for example an upright and a cross member. Instead of a single connecting element 87 (figure 18 to left) two connecting elements 87' can be provided (figure 18 on the right side) .

Furthermore, main sections 1, 2 or 3 comprise a groove 25 arranged according to various positions, depending on the case, adapted to house a seal rubber not shown for

tightness purposes when the above described closure panel is in the closed position. Groove 25 is obtained at first face 31, where it contacts an abutment surface 14, see figure 1, or on said abutment surface 14, see figures 2 and 16.

In particular, figures 1 and 2 show two examples of main section 1 and 2 for making the uprights of a frame obtained according to the invention, respectively for at least one push-type closure panel 60, shown in figures 4 and 5, or for at least one closure with pull-type leaf 61, shown in figures 10 and 11. The above described first face 31 has a thicker portion 32, having a width substantially equal to the thickness of the above described closure wing, consisting of an inner wall 22 and an external wall 23, with interposition of a chamber 24. Alternatively, the chamber 24 can be absent, and the thicker portion 32 is solid. In the example described in figure 1, the main section 1 comprises a main chamber 10 and an adjacent chamber 11, whereas in the example 2 of figure 2 the main section 2 comprises a chamber 12 having a substantially rectangular cross section to support abutment surface 14.

Main section 3, shown in figure 16, is particularly adapted ^• to obtain a frame for a door of a built-in wardrobe, shown in figure 17, having at least one closure panel 70 with at least one face having a surface on a same plane of the wall. Main section 3 comprises a chamber 11 and a chamber 13 in positions opposite with respect to the central chamber 10. In the example described in figure 16, a side face 16 is not knurled and is adapted to remain in the above described built-in wardrobe of figure 17, whereas side face 15 is knurled, as it is also the surface of wing 17 opposite to the aperture. The above described main section 3 comprises a tubular inner open portion 26, for example arranged like main chamber 10, adapted to house an adjustable shoe 85, shown in figure 18, capable of adjusting the position in height of the mounted frame.

Figure 3 shows a complementary extruded section 4 associable to the above described main section 1 and 2 described in figures 1 and 2, suitable for completing to

cover the thickness of said wall at the aperture (for example in figure 5-9 and 11-15) . This complementary section 4 has a reference face 41 adapted to operatively contact one of said side faces 15 of said main section 1 or 2, and an outer face 40 adapted to remain visible in the aperture defined by the frame on said wall.

On complementary section 4, furthermore, a complementary wing 45 can be provided, having a shape equal to wing 17 of main sections 1, 2 and 3 of figures 1, 2 and 16. The complementary wing 45 extends from said outer face 40 at the opposite ends with respect to said reference face 41. Furthermore, an engagement portion 42 is provided adapted to couple with said wing 17 of said main section 1 or 2 or to said complementary wing 45 of another complementary section 4. In particular, the above described engagement portion 42 is conformed in order to reproduce in negative the shape of the wing 17 of a main section 1 or 2, this engagement portion 42 being adapted to couple to wing 17 of a section 1 or 2 as above described or to a wing 45 of a next complementary section 4 mounted. In the example described, the outer face 40 and the reference face 41 are arranged substantially at an L configuration. The above described section 4 can have then a notch 44 in an intermediate position of the above described reference surface 41, adapted to assist cutting an exceeding portion, if required. The complementary section 4 of the example of figure 3 comprises a first support portion 47 parallel to the wall 50, shown in figures 4, 5 and 10, 11, which extends opposite to the outer face 40. From the first support portion 47 wing 45 protrudes at right angles. Furthermore, a second support portion 48 can be provided, parallel to said first support portion 47 and distant from said reference face 41 of the same length as the width of the wing 17 of a main section 1 or 2. Finally, the complementary section 4 has a complementary protrusion 55, equal to the protrusion 49 and the protrusion 18 of the main section opposite to the outer face 40 and at a distance from the second support portion 48 equal to the width of the wing 17 of the main

section 1 or 2 or the wing 45 of section 4 same. This way, by eliminating the part exceeding protrusion 55, opposite to reference face 41, a wing 46 remains, substantially equal to wing 45. The inner surface opposite to the outer face 40 is knurled, as also the surface of the above described first and/or second portion of reference is knurled, and oriented outwards with respect to reference face 41.

Figures 4 and 5 show a cross sectional view of two embodiments of a frame for doors or windows for receiving at least one push-type closure panel 60 having a surface on a same plane of a wall, mounted respectively on a board- wall 50, of thickness equal to the width of the main section 1, or on a wall 50 having a thickness equal to the total width of a main section 1 and of a complementary section 4 associated. Obviously, alternatively, the invention can be fixed to a wall brick-wall 51. In figures 4, 9, 10 and 11, on the right side, a wall is shown obtained from boards 52, for example of plasterboard, without showing the relative support structure. Instead, on the left side a brick-wall 51 is shown.

Figures from 6 to 9, show alternative assembling embodiments of a main section 1 for a push-type closure panel 60 (figure 4 and 5) associated respectively to a complementary section 4, a partial complementary section 4' , a complementary section 4 with a partial complementary section 4' , two complementary profiles 4 in series, according to the thickness of the wall.

Similarly, figures 10 and 11 show a cross sectional view of two embodiments of a frame for doors or windows for receiving at least one closure panel having a surface on a same plane of a wall for a pull-type door 61, respectively for a board-wall 50 of thickness equal to the width of the main section 2 and for a board-wall 50 of thickness equal to the width total of a main section 2 and of an associated complementary section 4. Obviously, like in figures 4 and 5, alternatively, the invention can be fixed to a brick-wall 51 (shown at the left) .

Figures from 12 to 15, show alternative embodiments of

assembling a main section 2 for a closure with pull-type leaf associated respectively to a complementary section 4, a partial complementary section 4' , a complementary section 4 with a partial complementary section 4', two complementary profiles 4 in series, depending the thickness of the wall.

Figure 17 shows an example of application of the frame according to the invention to obtain a built-in wardrobe comprising a closure wing, for example a wing 70. This frame is obtained with the section 3 described in figure 16 and, in particular, it has two uprights 80 and a cross member 82, shown in figure 18. This frame is connected for example to a box-like container consisting of wooden walls 72 defining a recess together, for example, to a bottom wall 71 suitable to form the above described built-in wardrobe. Obviously this recess can contain one or more shelves and can be defined directly by brick-walls.

Figure 18 shows a cross section made with a vertical plane of a frame for a built-in wardrobe as described in figure 17, before being assembled. This frame comprises two uprights 80 and a cross member 82 obtained with the above described main section 3, linked and kept together by means of two connection elements 87 in a single part, or in two parts 87 and 87', capable of engaging with a corresponding guiding groove 20 shown in figure 16. Similarly, also in case of the main section for a push-type closure panel 1 and for a pull-type door 2 the same connection elements 87 may be used. The frame of figure 18 comprises two adjustable shoes 85, having a cylindrical element 86 adapted to engage with open tubular portion 26 of main section 3. Figure 19 shows a possible alternative application of the frame obtained with main section 3 shown in figure 17, to obtain lighting, having a surface on a same plane of a wall and using a closure panel 70 made of a transparent material, associated to a light source hidden behind closure panel 70 in a recess 71. Like in figure 17, the recess is defined back by box-like container 72. The same arrangement of figure 19 can be used for panel like or bellows like trapdoors, shown in a rectilinear configuration, but it is not excluded that they can have

bent/angled or curved shape. Profiles 1-4 are preferably of extruded aluminium, but it can also be obtained by metal structural work, milling, casting, etc.

The examples of closure panels and walls are not limitative, being various other solutions possible according to the shape and the arrangements of the walls.

With reference to figures from 20 to 23, a section according to the invention can be obtained with a solid section 90, 91, 92, 93. More precisely, said or each support wing 17, is embedded in solid sections 90, 91, 92, 93, which can be for example a matrix of wood, resin, composite material, cement, etc. Wing 17 is obtained with at least one metal profile element 100, 101, 102, 103 having a protruding portion forming said wing and a root portion inserted or connected to the respective matrix 90, 91, 92, 93. As shown in particular, in figure 23, the two opposite wings 17 can also be obtained with a single metal profile element having the two protruding portions and a fastening portion all inserted in the matrix. This way, it is possible to obtain a profiled element alternative to the above embodiments made by extrusion or metal structural work.

Figure 24 shows an alternative exemplary embodiment of a main section 3, as already shown in figure 16, but with two support wings 17 at opposite sides. Such a section 3 can be used for the frame of a door for access to a recess, for example a built-in wardrobe as shown in figure 27. More in the detail the section 3 has both side faces knurled and wings 17 protrude from such faces. The first face 31 from the side of the aperture comprises an enlarged portion 110 with a bevelled portion 111 to assist centring screws for fastening a hinge. The inner sides can comprise respective channels 112 for assembling the head of more profiles in turn. Figures 25 and 26 show possible assembling configurations of such a section 3 for a board-wall 52. Section 3 can be mounted with a complementary section 4 (figure 26) in case of a wall of width higher than section 3. In case of a board-wall, section 3 can be mounted

through a bracket 120.

Figure 27 a horizontal cross section of assembling such a section 3 for forming the frame of a two wing door 70, arranged to stop a recess or for closing a built-in wardrobe defined by walls 71 and 72 within a brick-wall.

Figure 28 shows an alternative exemplary embodiment of a main section 150 according to the invention, adapted to assemble a fixed panel 138 (figure 31) , for example of a glass sheet to form a fixed glass wall, where the face from the side of the aperture 31 belongs to a removable section 150 (figure 30) , thus allowing the access to main section 3 to allow the operations of assembling sheet 70 (figure 31) . Such a removable section has side faces 15 and 16 knurled and has a support wing 17 protruding at right angles from side face 15. Section 150, which comprises chambers 131, 132 and 133, has an abutment surface 135, adapted to grip sheet 138 (figure 31) in an orthogonal direction, and a reference surface 130 adapted to contain it laterally. For stopping the sheet in position a sheet holding section 140 is provided, shown in figure 31, having a further abutment surface 141 adapted to push the edge of the sheet 138 (figure 31) when it is mounted, and, at right angles, an assembling surface 142 that couples operatively with reference surface 130 (figure 28). Sheet holding section 140 comprises coupling edges 143 adapted to engage at one end with removable section 155 (figure 30) . Removable section 155, shown in figure 30, has, at one end, a further coupling portion 152 and 153 within edges 143 of the sheet holding section 140. The opposite ends comprises another coupling wing 151, adapted to engage with a resilient section 154 (figure 31) mounted operatively in a channel 134 present in main section 150 (figure 28) .

In figure 31, a cross sectional view is shown of an exemplary assembling step of a section 150 mounted in a board-wall. On main section 150 the sheet holding section 140 and removable section 155 are mounted. Sheet 138, in particular, a wall glass, is insulated resiliently by section 150 by sealing members 156 and 157, whereas the

fixed joint of removable section 155 is fixed by sealing member 158 and by resilient section 154.

Figures from 32 to 35 show a succession of assembling steps of sheet 138 in section 150. In figure 32 the main section, with sealing members 156 and 157 and resilient section 154, is mounted in a wall for example a board- wall. In figure 33, the sheet 138 is located up to an abutment position. In figure 34 the sheet holding member is inserted in the main section. In figure 35, the removable section 155 is snap-fitted in main section 150.

In figure 36 a cross sectional view is shown of an additional section according to the invention, having a face from the side of the aperture 162, an inner face 164 at the opposite side, two side faces 160 and 163, a housing defined by support wings 167 that protrude at right angles from the face at the same side of aperture 162, whereby wings 167 are arranged as extensions of the above described housing. A releasable blocking diaphragm 168 can be provided in case the wings 167 are used as reference for a board. Side face 163 is arranged to leave free an outer recess defined by surfaces 163, 165 and 166. Additional section 160 is mounted concealed by embedding it in a ground or in a ceiling or also in a wall, as shown in figure 38, where the boards 170 of a ground surface are operatively mounted at minimum distance from the wings 167.

It is possible to increase the length of support wings 167, by adding to such wings one or more complementary profiles 4, shown in figures 3 and 26, in a way similar to that shown in figures 6-9 and 26, but not shown in figure 36.

The additional section can comprise a clamping portion consisting of a fixed wall 176 of additional section 160, inner to housing, and a movable jaw member 180 (figure 37), operated by pushing members 169 (figure 38). The movable jaw member 180 has an outer face 181 and an inner face 182.

As shown in figure 38, pushing members 169 are operated by a gear system having perpendicular axes, for

example a nut-worm screw system 190, mounted in the recess defined by surfaces 165, 166 and 163, which can be operated from the outside rotating a screw 174 (figure 39) . The sheet, in particular of glass, is insulated from the additional section by resilient seals 171, 172 and 173.

Figure 39 shows a perspective view of figure 38. In figure 40 an exemplary assembling step is shown of a glass sheet 138 using section 150 for fixed sheets already described in figure 31, both for assembling the lower edge of sheet 138 on a ground surface 210 and the upper edge on a ceiling surface 220.

Alternatively, as shown in figure 41, sheet 138 can be mounted with additional section 160 hidden in the ground or in the ceiling.

Obviously both section 150 and additional section 160 can be mounted on all the sides of sheet 138. In particular, arranging the additional section 160 on all the sides, the whole frame of the closure panel 138 remains completely hidden when the assembling steps are completed.

In particular, the additional section 160 allows to assemble safely boards with regular geometric shape, or shaped with irregular shape, protruding from a ground surface, from a wall, from a ceiling surface where the assembling device remains completely hidden, with ideal aesthetic effect.

Figure 42 shows a main section 200 according to the invention where the face from the side of the aperture 31 is plane, without shoulder. This particular conformation allows use this section 200 for making a crosspiece of the frame structure for a door 60' (fig 45) , having an axis of rotation 60' ' not coincident with an edge of the door 60' . Such plane shape is required because it works both for push- type and for pull-type engagements at the same time; in fact a portion of this section 200 should work for a pull-type door and another for a push-type door, since a side edge of the door has a push-type engagement, and the opposite edge has a pull-type engagement. Furthermore, such a section can be used for defining an aperture, not shown in the figure,

on a wall or on a ground or on a ceiling, creating a frame portion on one or several sides of the aperture.

In figures 43 and 44 examples are shown of a section for a pull-type door 2 and a push-type door according to the invention 1 used as uprights opposite to the frame. Such profiles 43 and 44 repeat the shape and the features of the respective profiles 2 and 1 of figures 2 and 1 with the difference that the enlarged portion 32 does not comprise recesses 24 (figure 1 and 2) . The foregoing description of a specific embodiment will so fully reveal the invention according to the conceptual point of view, so that others, by applying current knowledge, will be able to modify and/or adapt for various applications such an embodiment without further research and without parting from the invention, and it is therefore to be understood that such adaptations and modifications will have to be considered as equivalent to the specific embodiment. The means and the materials to realise the different functions described herein could have a different nature without, for this reason, departing from the field of the invention. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.