LU88686A1 - Multiple glazing and method of manufacturing such glazing - Google Patents

Description

Multiple glazing and method of manufacturing such glazing

The present invention relates to a multiple glazing, in particular to a glazing comprising two sheets of vitreous material arranged face to face and spaced from each other, comprising a space containing gas intermediate to said sheets delimited by a spacer s' extending peripherally. The present invention also relates to a method of manufacturing such glazing.

Multiple glazing, for example double glazing, is very useful for increasing the thermal and sound insulation of the interior of buildings and, therefore, for increasing the comfort of their occupants, in comparison with the low insulation provided by single glazing ordinary.

Double glazing consists of two sheets of a glassy material such as glass, kept spaced from each other, and assembled, usually by their edges, by means of a spacer. The spacer is usually a metal profile which is glued along the four edges of the sheets. A hollow space defined by the spacer and hermetically sealed is thus formed between the sheets. This space is filled with a dry gas such as dry air. It is important that the gas confined inside this space remains dry in order to avoid any condensation of water inside the double glazing during temperature changes. If there is condensation of water vapor on the internal walls of the glazing, its transparency will be reduced and the visibility through such glazing will be affected.

Multiple glazing comprising two sheets of vitreous material arranged face to face and spaced from one another is known. A space containing gas is delimited by a spacer extending peripherally between the sheets. A bead of resin is placed at least between the spacer and each of the sheets in order to hold the latter in place. Usually, the glazing is mounted in a frame having a U-shaped profile and in which the edges of the glazing are retained, this frame being fixed to a support structure, for example inside a bay of a building wall. .

There is a growing commercial demand to install glazing in bays by gluing the sheets to the support structure instead of mounting them in a U-profile frame. This recent glazing installation technique is often called "bonded exterior glazing (VEC)" or (somewhat improperly) "structural glazing". This technique first makes it possible to form apparently totally glazed facades. It also allows the glazing to be installed flush with the hull of a vehicle, for example. This provides advantageous aesthetic effects.

In a commonly used installation process, multiple glazing is first assembled in the factory. 11 is then transferred to a workshop where a frame is fixed by gluing to the periphery of the glazing. The assembly is then transferred to the building site to be attached to the building structure. In a process variant, the glazing is assembled on site.

These two processes are based on operations carried out outside the factory for which it is not easy to control the quality of the finished product and which may require costly additional steps.

German patent application DE 3626194 (Schüco) relates to double glazing fixed to the structure of a building so as to constitute a fully glazed facade. The outer sheet of such glazing is larger than the inner sheet and a fastening element, fixed to the structure of the building, is secured to the inner peripheral face of the iron; A branch of the fixing element is inserted in a U-shaped profile immersed in the center of the adhesive resin for sealing the glazing. This fixing system is relatively complex and expensive. Among other things, it complicates the construction of glazing and increases its cost, in particular because the glazing cannot be built in a production line of the type used for traditional double glazing. The insertion of the profile into the hardened resin after injection or the injection of the resin around the profile are delicate operations which are very difficult to carry out on a large scale. In addition, there is a risk of interruption in the continuity of the adhesive material, particularly at the corners of the glazing, which can drastically reduce its durability.

Another system for mounting double glazing on building facades by the technique known as "structural glazing" is described in the French utility model FR 2577274 (Schüco). The spacer of a double glazing is placed in a notch and a U-shaped profile is placed at the periphery of the glazing in the slot between the sheets of glass. The serial construction of this glazing is difficult because the extraction of the excess adhesive sealing resin necessary for the placement of the U-profile is a delicate operation to be carried out on a production line. In addition, there is a risk of moisture penetration between the outer sheet and the profile. This also causes a change in the external appearance of the periphery of the glazing, which is undesirable from an aesthetic point of view when looking at the facade of the building.

One of the objects of the present invention is to provide multiple glazing and a method of manufacturing such glazing, the operations of which can be carried out in the factory so as to more easily control the quality of the finished product and to provide ready multiple glazing. to be installed by a technique of "structural glazing".

The present invention, in its first aspect, relates to a multiple glazing comprising at least two sheets of vitreous material arranged face to face and spaced from each other, comprising a space containing gas intermediate said sheets and delimited by a peripherally extending spacer, a bead of resin securing said sheets to each other, and a fixing element immersed in said resin to constitute means for fixing the glazing to a support structure, said fixing element defining a channel open to the outside, characterized in that said fixing element is disposed in the immediate vicinity of the first of said sheets, while being spaced from the second of said sheets.

ns its second aspect, the invention relates to a glazed structure constituting at least one building facade, which incorporates several glazings as defined above.

One might think that the presence of fastening elements can hinder the application of the resin, with the consequence of the presence of bubbles at the glass-spacer interface or the risk of poor cohesion of the glazing sheets.

It is therefore surprising that the invention leads to the production of high-quality glazing which can be fixed directly to the structure of a building.

The fixing element can be fixed directly to the glazing on an automatic double glazing production line, when the glazing is assembled. This can be done under the supervision of a factory specialist, eliminating the need to rely on operations performed on the building site or in an additional workshop. It is therefore easier to control the quality of the finished product.

In addition, the invention provides a multiple glazing easy to install by a technique of "structural glazing" and easily achievable in the factory with careful control of the application of the resin.

Preferably, the fastening element is a U-shaped section which can comprise, in cross section, two wings joined by a core, the free ends of the wings not exceeding the edge of the first sheet, but ideally flush with the edge of the first and that of the second sheet. The core is preferably inclined so that the wing adjacent to said first sheet is longer than the other wing. The inclination angle can be greater than 10 ° C, for example between 10 ° C and 45 ° C, advantageously between 25 ° C and 40 ° C, such as 35 ° C.

Preferably, the fastener has a width of less than half the space between the first and second sheets, which provides sufficient space between the fasteners and the second sheet for the introduction of the resin. . In addition, the fixing element preferably has a depth which is between 25% and 75% of the depth of the space occupied by the resin, that is to say the distance between the spacer and the edges. leaves. This ensures that the resin comes into contact with a sufficient surface of the first sheet to adhere to it reliably while ensuring that the channel in the fixing element has a sufficient depth to ensure a secure fixing of the glazing once it installed.

Preferably, the glazing comprises several fixing elements, the assembly of which extends around the glazing. These arrangements have the advantage of providing the best possible fixing of the glazing to the support structure. When, for example, the glazing has a rectangular shape, four fixing elements are preferably each arranged along a different edge of the glazing and positioned at right angles to each other. Alternatively, fastening elements may be arranged only on two opposite edges of the glazing, its other opposite edges not being provided with fastening elements. The fastener can be made of aluminum, stainless steel or a rigid plastic such as PVC.

To allow the glazing according to the invention to be mounted by a "structural glazing" technique, it is preferred that the fixing elements do not project beyond the plane of the glass sheet of the glazing intended to be placed outside when the glazing is assembled with others in a structure such as a building.

To allow greater rigidity of the spacer / sheets / fixing element assembly, the resin bead preferably extends at least between the spacer and each of the sheets.

Preferably, the resin is an adhesive material which, at 20 ° C, has an elongation which is not more than 12.5% when it is subjected to a tensile stress of 0.1 MPa, advantageously 0.14 MPa, measured according to ISO 8339. The adhesive material also preferably exhibits, at 20 ° C, an elongation which is not more than 12.5% when it is subjected to a tensile stress of 0.1 MPa after aging. for 500 hours in water at 55 ° C, in particular when it is subjected to a tensile stress of 0.14 MPa after aging for 1000 hours at 45 ° C. It is particularly preferred that the adhesive material has an elongation which is not more than 12.5% when it is subjected to a tensile stress of 0.1 MPa, preferably 0.14 MPa, over a temperature range of -20 ° C to 55 ° C, preferably over a temperature range of -40 ° C to 70 ° C. Preferably, the adhesive material has a breaking stress at 20 ° C which is greater than 0.70 MPa, preferably at least 0.84 MPa, and a breaking strain greater than 50%. The preferred adhesive material exhibits cohesive failure when subjected to a tensile stress greater than its tensile strength.

Preferably, the adhesive material is chosen from silicone-based adhesive materials, but it is also possible to use polysulphide or polyurethane adhesive materials. When using a polysulfide or other light-sensitive material, it is preferred to include in the glazing means to protect the adhesive material against solar radiation. Such means may include, for example, an UV coating on the outer sheet of glassy material or a strip of glassy enamel formed by silk screen printing. /

Preferably, the sealing layers are arranged between the spacer and each of the sheets. Therefore, a waterproof seal can be obtained using two different materials. The first material, which is highly impermeable to water, but relatively flexible, is generally called "sealing material" in the present description and can for example be a polyisobutylene. The second material, which is highly adhesive and relatively rigid, is generally called "resin" in the present description.

The spacer may be formed from a metal or a plastic. It may be hollow, its interior then being in communication with the space containing gas internal to the glazing. When this is the case, a desiccant can be placed inside the spacer. Such a spacer may have a trapezoid-shaped cross section.

Alternatively, the spacer has a cross section which can be opened onto the gas space. For example, the cross section of the spacer has a flared U shape. Such a cross section may include two flared wings interconnected by a core. The flared wings can be deformably connected to the core to allow a certain transverse flexibility of the spacer which serves to compensate for the stresses resulting from temperature increases or other causes. In these embodiments, a desiccant may be disposed within the spacer. Alternatively or additionally, the sealant may contain a desiccant.

In another embodiment, the spacer is essentially made of a polymeric material. A suitable spacer is known under the name of "Swiggle Strip" "(trademark) of TREMCO SA, F-75643 Paris, Cedex 13, which is a pre-extruded butyl tape having a metal core and containing a desiccant powder of the type The molecular sieve also acts as a moisture barrier.

The first and / or second sheet (s) may (wind) consist (s) of a composite glazed panel, that is to say a glazing which consists of, or comprises, a pair of vitreous sheets glued to an intermediate layer of polymeric material sandwiched between them. The intermediate layer can, for example, be PVB to form laminated safety glazing. Other intermediate materials, such as acrylate polymers, can be used to provide glazing with exceptional acoustic properties due to their viscoelastic properties.

A composite panel may be formed from two or more glassy sheets which are of equal thickness, or there may be a difference in thickness between the sheets, the latter arrangement leading to different sound insulation properties.

If a composite panel, consisting of a polymeric intermediate sheet which has viscoelastic properties providing acoustic insulation, is placed in an external position, it is preferred that the sheets of the composite panel are secured by means of the resin bead. This can be achieved when the edges of the sheets are moved relative to each other in such a way that the bead of resin can be in contact with the two sheets of the composite panel, to ensure that the outer sheet is retained in a manner safe.

Advantageously, the second sheet of the glazing is a non-laminated sheet of vitreous material. Such a sheet has a much lower production cost than a composite panel. Preferably, the vitreous sheets of the glazing are subjected to a thermal quenching treatment. It is preferable, however, that the inner glassy sheet be thermally cured, rather than quenched, so that the outer panel continues to be held in place at its periphery should the inner sheet be broken.

According to another aspect, the present invention provides a method of manufacturing multiple glazing, comprising a step of: (i) providing two sheets of glassy material, characterized in that it comprises the steps of: (ii ) securing a fixing element to the periphery of the first of said sheets to constitute means for fixing the glazing to a support structure, said fixing element defining a channel open towards the outside and positioning each of said vitreous sheets facing facing and spaced from each other, with a space containing gas intermediate to said sheets and delimited by a spacer extending peripherally so that the fastening element is adjacent to the first of said sheets while being spaced the second of said sheets; (iii) applying a bead of resin in the space defined by said sheets, said spacer and said fixing element to immerse said fixing element and to secure said sheets to each other.

This simple manufacturing process can be carried out with a chain under controlled atmosphere, to ensure that the fixing element is fixed correctly and securely to the glazing so that the latter can be securely held in place and, at the same time ensuring the space containing the gas has a sufficiently low humidity level. The glazing arrives from the factory ready to be installed and does not require substantially any other manipulation on the site than its fixing to the support structure of a building, for example.

Preferably, the fixing element is fixed to the first sheet by means of a double-sided adhesive tape, but it is possible to use other fixing means, such as glue. When using a double-sided adhesive tape, this preferably has a portion which extends beyond the edge of the first sheet, this portion being folded over to cover the opening of the channel before step (iii) so as to avoid filling the channel with resin. The folded portion of the double-sided tape can be unfolded or removed before the glazing is mounted on a support structure.

Since the fixing element is already glued against one of the sheets, the resin injection must only be carried out on one side of this element, which makes it possible to assemble by a machine on a conventional chain of production. This also avoids the need to push the fixing element into the seal after gluing the glazing.

After the polymerization of the resin, the glazing leaving the factory can be sent directly to the site of the building to the structure of which it must be fixed and where additional fixing parts are inserted in the channel of the fixing elements.

In order to fix the glazing to a facade, it is possible for example to use pivoting fastening pieces, having a length of 25 mm, which are distributed every 20 cm around the opening in which the glazing is to be mounted. The glazing is put in place and the fixing parts are then pivoted by 90 ° to engage them in the channels formed by the fixing elements, so as to hold the glazing in place.

The invention will now be described in more detail with reference to the accompanying drawings, in which:

Figure 1 is a partial cross section of a double glazing according to a first embodiment of the invention;

Figure 2 is a partial cross section of double glazing according to a second embodiment of the invention;

Figure 3 is a partial cross section of double glazing according to a third embodiment of the invention;

Figure 4 shows in partial cross-section how two adjacent glazings as shown in Figure 1 are attached to the facade of a building; and

Figure 5 shows a partial plan view of glazing as shown in Figure 1 subject to the facade of a building. /

Figure 1 shows a multiple glazing comprising two sheets of glass 7, 8 arranged face to face and spaced from one another. The first sheet 7 constitutes the inner sheet of the glazing. A space 9 containing gas between the sheets is delimited by a spacer 3 extending peripherally made of galvanized steel 0.4 mm thick. Sealing layers 5 of polyisobutylene are placed between the spacer 3 and each of the sheets 7, 8. The polyisobutylene used has a permeability of approximately 0.11 g of water x mm of thickness per mx 24 hx kPa of water vapour.

A bead of resin 6 fills the space between the spacer 3 and each of the sheets 7, 8 and glues the sheets together. A fixing element 2 is immersed in the resin to constitute means for fixing the glazing to a support structure. The fixing element defines a channel 25 open towards the outside. The fastening element is placed in the immediate vicinity of the first sheet 7 and is glued to it, while being spaced from the second sheet 8. The fastening element 2 is a U-section profile comprising, in section, two wings 21, 22 joined by a core 23 which is inclined at an angle of about 35 ° so that the resin can completely fill the space. The free ends 21a, 22a of the wings do not protrude substantially from the edge 71 of the first sheet 7 and from the edge 81 of the second sheet 8.

The fixing element 2 is glued to the first sheet 7 by means of a double-sided adhesive tape 1, such as the Glazing Tape VG 132 (from Qualitape, Belgium).

The fastener 2 has a width which is less than half the space between the first and second sheets 7, 8. For example, when the sheets are spaced 12 mm apart, the total width of the fastener 2 is 5 mm. In addition, when the spacer 3 is placed 16 mm from the edges 71, 81 of the sheets 7, 8, the fixing element 2 preferably has a total depth of approximately 10 mm, to ensure that the resin 6 comes into contact with a sufficient surface of the first sheet 7 to ensure reliable fixing, while ensuring the channel 25 of the fixing element 2 a sufficient depth to ensure secure fixing of the glazing for use.

Resin 6 is an adhesive material based on silicone which has an elongation at 20 ° C which is not more than 12.5% when subjected to a tensile stress of 0.1 MPa, measured according to ISO 8339. The preferred silicone adhesive is "Q 3362" from Dow Corning, which has an elongation of 12.5% when subjected to a tensile stress of 0.27 MPa before aging, and an elongation 12.5% when subjected to a tensile stress of 0.2 MPa after aging for 21 days in water at 55 ° C, measured according to method A of ISO 8339. The tensile strength of this material is 1.08 MPa before aging and 0.92 MPa after aging, the elongation at break being greater than 50% and the break being cohesive, both before and after aging. The resin 6 is in contact with a face of the first sheet 7 and also with a face of the second sheet 8.

In use, the sealing material 5 acts as a barrier against the penetration of water vapor into the gas space 9 while the resin 6 contributes to keeping the sheets 7, 8 face to face.

The process for constructing multiple glazing is as follows. The fastening element 2 is first placed in the immediate vicinity of the first sheet 7 and secured to the latter by means of a double-sided adhesive tape 1. In a second step, polyisobutylene sealing cords are placed suitably on the side faces of the spacer 3; the spacer is placed along the marginal zone of the glass sheet 7 and the other glass sheet 8 is placed over it. The glass sheets are then pressed together to crush the sealing butyl between them to the desired point.

The fastening element 2 is thus placed in the immediate vicinity of the first sheet 7 while being spaced from the second sheet 8.

Then, the resin bead 6 is injected into the space defined by the sheets 7, 8, the spacer 3 and the fixing element 2 to immerse the fixing element 2 and it is left or hardened to stick. together sheets 7, 8.

The double-sided adhesive tape 1 has a portion 11 which extends beyond the edge 71 of the first sheet 7, the portion 11 being folded over (as shown by the dotted line in FIG. 1) to cover the opening of the channel 25 before injecting the resin, so as to prevent this channel from being filled with resin. The folded portion 11 of the double-sided tape is removed before the glazing is mounted in a support structure.

In the embodiment shown in Figure 2, the first sheet 7 consists of a composite panel having a pair of glassy sheets 72, 73 bonded to an intermediate layer 74 of polymeric material sandwiched therebetween.

The first sheet 72 is made of thermally hardened glass having a thickness of 6 mm and carrying an anti-solar coating of STOPSOL (trade mark) on its internal face. The second sheet 73 is made of thermally hardened glass 5 mm thick and bearing a coating with low emissivity. An emissivity fable coating is arranged on the face of the sheet 73 furthest from the sheet 72. The first sheet 72 constitutes the inner sheet of the glazing.

The layer of acrylic polymer material 74 has viscoelastic properties such that the critical frequency of coincidence of the sheet 7 is greater than the critical frequency of coincidence of a notional monolithic vitreous sheet which has the same shape and the same surface as the sheet 7 and has a mass equal to the total mass of the glassy material in this sheet 7. A suitable acrylic polymer is UVKOL (trademark) from UCB SA, B-1620 Drogenbos, Belgium.

FIG. 2 represents a double glazing comprising a sheet of glass 8 formed of thermally toughened glass 5 mm thick, placed facing the sheet 73 of the composite panel 7 and separated from the latter by an air layer 9 of 12 mm .

The method of manufacturing the glazing according to FIG. 2 comprises the following steps. First, the two glassy sheets 72 and 73 are placed face to face and spaced from each other. A ribbon 75 of butyl sealant 8 mm thick is placed between the sheets 72 and 73 at a distance of about 8 mm from their peripheral edge 71. The ribbon is formed by placing a bead of sealant butyl on one of the glass sheets and crushing this cord into a ribbon of width determined by pressing the two sheets towards each other. The ribbon 75 is continuous with the exception of two interruptions (not shown) which allow respectively to empty the space between the glass sheets and to inject into this space an acrylic polymer-forming material, the ribbon delimiting the surface occupied by the polymeric material in the composite panel 7. After the injection of the formative material, the interruption present in said strip is closed by an additional supply of sealing material. The acrylic polymer-forming material is then polymerized by exposure to ultraviolet radiation.

The next step in the process is the positioning of the fastening element 2, followed by the steps described above with regard to the embodiment shown in FIG. 1.

Alternatively, the film 74 extends to the edge 71 (i.e., the bead 75 of butyl sealant is omitted) and is made of PVB.

In another variant, the spacer 3 and the sealing material 5 are replaced by a "Swiggle Strip".

FIG. 3 represents a double glazing comprising a glass sheet 7 and a composite panel 8. The latter has two vitreous sheets 82, 83 bonded to an intermediate layer 84 of polymeric material having viscoelastic properties, sandwiched between them. A cord 85 of butyl sealing material is placed between the sheets 82, 83. The sheet 7 is arranged opposite the sheet 82 of the composite panel 8, and separated from the latter by an air layer 9. The first sheet 83 constitutes the outer sheet of the glazing.

A portion of the first sheet 83 protrudes from the edge of the second sheet 82. The protruding marginal portion extends over the entire periphery of the composite panel 8. The resin 6 is in contact with a face of the sheet 83 and also with a face and the edge of the sheet 82. This resin 6 is used not only to glue the sheet 7 to the composite panel 8, but also to glue the two sheets of this panel together.

The free ends 21a, 22a of the wings of the U-shaped fixing profile 2 are substantially flush with the edge 71 of the sheet 7 and the edge 81 of the outer sheet 83 of the panel 8.

FIG. 4 shows the way in which two adjacent glazing units 41, 42 are fixed to a building. The space between the panes is approximately 20 mm. Seals 44 are arranged between the glazing and a support piece 43 is fixed to the structure of the building. Fasteners 45, carried by the support piece 43 by means of screws 46 are rotated 90 °, after the glazing has been put in place, so that they engage in the fastening element 2. L 'between the glazing and the support piece 43 is delimited by a cylindrical spacer 47 surrounding the screw 46. The inner sheet of the glazing is thus pressed against the seals 44. A filling material 48 made of foam , covers the head of the screw 46 and is in turn protected by a silicone seal 49.

The mass of each glazing must be supported by at least two shims which are fixed to the structure of the building. These shims are not shown in FIG. 4 for reasons of clarity.

FIG. 5 represents a partial plan view of the glazing 41 and 42, as well as two adjacent glazing 41 'and 42 ’. Figure 5 shows the distribution of fasteners 45 around the glazing, and the arrangement of fastening elements 2. Only four corners of four adjacent glazing are shown, the dashed lines indicating the position of the fastening elements and pivoting fastening parts 45, which are turned upwards to fix the upper glazing, downwards to fix the lower glazing, and to the left or right to fix the glazing on the left and right respectively.

/

Claims (25)

1. Multiple glazing comprising at least two sheets of vitreous material arranged face to face and spaced from each other, comprising a space containing gas (9) intermediate said sheets and delimited by a spacer extending peripherally (3) , a bead of resin (6) securing said sheets to each other, and a fixing element (2) immersed in said resin to constitute means for fixing the glazing to a support structure, said fixing element defining a channel (25) open to the outside, characterized in that said fixing element is arranged in the immediate vicinity of the first of said sheets (7), while being spaced from the second of said sheets (8). 2. Multiple glazing according to claim 1, characterized in that said fixing element is secured to said first sheet (7), preferably by means of a double-sided adhesive tape (1). 3. Multiple glazing according to one of claims 1 or 2, characterized in that said fixing element is a U-shaped cross section profile. 4. Multiple glazing according to claim 3, characterized in that said fixing element (2) comprises, in cross section, two wings (2/1, 22) joined by a core (23), the free ends (21a, 22a ) of said wings not projecting from the edge (71) of said first sheet (7). 5. Multiple glazing according to claim 4, characterized in that said core (23) is inclined so that the wing (22) adjacent to said first sheet is longer than the other wing (21). 6. Multiple glazing according to one of claims 1 to 5, characterized in that the free ends (21a, 22a) of said wings are disposed substantially flush with the edge (71) of said first sheet (7) and the edge (81 ) of said second sheet (8). 7. Multiple glazing according to one of claims 1 to 6, characterized in that said fixing element (2) has a width less than half the spacing between said first and second sheets (7, 8). 8. Multiple glazing according to one of claims 1 to 7, characterized in that said resin bead (6) extends at least between said spacer (3) and each of said sheets (7, 8). 9. Multiple glazing according to one of claims 1 to 8, characterized in that said resin (6) is an adhesive material which has, at 20 ° C, an elongation which is not greater than 12.5% when it is subjected to a tensile stress of 0.1 MPa, measured according to ISO 8339. 10. Multiple glazing according to claim 9, characterized in that said adhesive material has, at 20 ° C, an elongation which is not more than 12.5% when it is subjected to a tensile stress of 0.14 MPa. 11. Multiple glazing according to one of claims 9 or 10, characterized in that said adhesive material has, at 20 ° C, an elongation which is not greater than 12.5% when it is subjected to a stress of tensile strength of 0.1 MPa after aging for 500 hours in water at 55 ° C. 12. Multiple glazing according to one of claims 9 to 11, characterized in that said adhesive material has, at 20 ° C, an elongation which is not greater than 12.5% when it is subjected to a stress of tensile strength of 0.14 MPa after aging for 1000 hours at 45 ° C. 13. Multiple glazing according to one of claims 9 to 12, characterized in that the adhesive material has a breaking tension at 20 ° C which is greater than 0.70 MPa and a deformation at break greater than 50%. 14. Multiple glazing according to one of claims 1 to 13, characterized in that said resin (6) is chosen from adhesive materials based on silicone. 15. Multiple glazing according to one of claims 1 to 14, characterized in that one of said sheets consists of a composite glazed panel comprising a pair of vitreous sheets (72, 73; 82, 83) bonded to a layer intermediate (74; 84) of polymeric material sandwiched between them. 16. Multiple glazing according to claim 15, characterized in that the intermediate polymer layer (74; 84) is chosen from acrylate polymers. 17. Multiple glazing according to one of claims 1 to 16, characterized in that sealing layers (5) are arranged between said spacer (3) and each of said sheets (7, 8). 18. Multiple glazing according to one of claims 1 to 17, characterized in that it comprises several fixing elements the whole of which extends around the glazing. 19. Multiple glazing according to claim 18, characterized in that it generally has a rectangular shape, each of four fixing elements being arranged along a different edge of the glazing and positioned at right angles to each other . 20. Glazed structure constituting at least one building facade, which incorporates several glazings according to one of claims 1 to 19. 21. A method of manufacturing multiple glazing comprising a step of: (i) providing two sheets of vitreous material, characterized in that it comprises the steps of: (ii) securing a fixing element to the periphery of the first of said sheets to constitute means for fixing the glazing to a support structure, said fixing element defining a channel open towards the outside and positioning of each of said glassy sheets face to face and spaced apart from one other by a space containing gas intermediate to said sheets and delimited by a spacer extending peripherally so that the fastening element is adjacent to the first of said sheets while being spaced from the second of said sheets; (iii) application of a bead of resin in the space defined by said sheets, said spacer and said fixing element to immerse said fixing element and subject said sheets to each other. 22. Method according to claim 21, characterized in that step (ii) comprises securing the fixing element to said first sheet by means of a double-sided adhesive tape. 23. The method according to claim 22, characterized in that said double-sided adhesive tape has a portion which extends beyond the edge of said first sheet, said portion being folded back to cover the opening of said channel before step ( iii) so as to avoid filling said channel with resin. 24. The method of claim 23, characterized in that it further comprises the removal of said folded portion of said double-sided tape before mounting the glazing on a support structure. 25. Method according to one of claims 21 to 24, characterized in that step (ii) comprises securing a fastening element along each edge of said first sheet.