EP1120535A1 - Insulating glazing with integrated double blind - Google Patents

Abstract

The blind has an upper (1) and a lower (2) slats which can be totally and independently confined in the top or bottom part of the bay in which the blind is to be used. The lower slat (3) of the upper unit and the upper slat (4) of the lower unit are connected to the slats of their respective units by vertical ladder chains (7,8). An Independent claim is also included for the double glazing.

Description

The present invention relates to insulating glazing in which is incorporated an improved blind. By “insulating glass” we mean here commonly glazing comprising at least two glass panels and / or a transparent plastic material such as polycarbonate, poly (methyl methacrylate) or similar, assembled by a frame peripheral, which enclose an intermediate plate of a gas, in particular of air can be dehydrated when the glazing structure is suitable for guarantee the required tightness. This type of glazing provides insulation thermal and phonic improved.

Insulating glass is frequently associated with blinds external, for example venetian blinds generally consisting of sets of blades capable of pivoting along horizontal axes, between a vertical shutter position and a horizontal position authorizing the passage of a substantial part of the light rays. Of such external blinds however have two types of drawbacks.

First, they have a tendency to retain large amounts dust, which requires cleaning operations made problematic by the complexity of the shape of the blind.

Second, these blinds are fragile and as much should be avoided as possible to subject it to impact or incorrect handling.

These two problems could be solved in accordance with an art represented by patent FR 2 697 281 by the integration of the blind Venetian in the air space delimited by two sheets of glass insulating. This assembly isolates the blind from the atmosphere more or less dusty and it further helps separate the different organs from blind control - twine or the like - from each other in spaces designed for this purpose in the context of insulating glass, which is likely to reduce the risk of improper handling. It needs possibly adapt the width of the blind blades to that of the blade air, i.e. decrease it to such low values in some cases as 1 to 2 mm.

In the context described above, the invention has however responded to the need to improve known blinds, but on another level than that of their integration in insulating glass. In the case of common venetian blinds for example one of their features is that all the blades they understand define parallel planes. he As a result, the degree of filtration of the light radiation, of the least impaired visibility possible corresponding to a virtual absence of filtration, until obturation, is almost identical over the entire height of the blind, to variations in the angle of incidence of the near radiation. Gold a functionality of the blind vis-à-vis the light radiation differentiated by height can be searched.

It may thus be desirable to seal an upper part of a glazing to limit the heat input due to light radiation while the blades of a lower part are in the visibility position, or on the contrary to adjust the blades of an upper part of a glazing in substantially horizontal position so that they reflect the light radiation on the ceiling while blocking part lower.

Several devices have been designed for this purpose.

Application EP 0 513 468 A1 describes a Venetian blind, the part of which bottom consists of a continuous ply vertically foldable in accordion, instead of disjointed blades. The only possible functionality of this lower part is therefore the obturation.

The utility model DE 298 15 654 U1 and the application EP 0 899 411 A2 describe a double blind integrated in insulating glass, consisting of an upper system of blades and a lower system of blades both fixed to a horizontal intermediate element. This one is an obstacle to vision, and these devices do not allow free at least one zone at medium height of the glazing from any element of awning.

Consequently, the object of the invention is to provide a awning to differentiate the degree of filtration of radiation bright at least one upper part and at least one lower part and clear at least one zone at medium height of the glazing from all blind element.

This object is achieved by the invention which consequently relates to a blind comprising at least an upper part and a part lower. The invention lies more particularly in the fact that the upper part respectively the lower part can be contained in their entirety and independently of each other in an upper part, respectively a lower part of the bay for which the blind is used.

The invention, by providing two parts of the blind separate, authorizes for each of the two parts an adjustment of the degree of filtration of differentiated light radiation. Organ design different commands for each of the two parts is easy.

On the other hand, the containment of the upper part and the part lower at the top and bottom of the bay makes it possible to release part of it average height, to almost all of its surface, of any element awning, and allows unobstructed vision in this area.

Although the Venetian blind type blinds have been mentioned above, any means of concealment and / or filtration gradual light radiation can enter the constitution said upper and lower parts of the blind: as such may be cited moving panels in sails or various fabrics, or in materials able to change color, darken or go from an opaque state to a translucent or transparent state, reversibly under the effect of various excitations, such as electrochromic materials, photochromic, liquid crystal or the like.

Of course, it is possible, even recommended in case of search for different effects for the upper part and the part use materials, colors and systems and principles of filtration of different radiation for the two parts. In this regard may be mentioned the use of a venetian blind for the upper part and a reflective fabric for the bottom, or vice versa. This is the especially when looking for a so-called "daylighting" effect consisting of reflection and scattering of light radiation incident up.

Depending on the case, it is easily understandable that the mode of containment of said upper and lower parts will include a stacking and / or folding and / or winding ...

However, in accordance with a preferred variant of the invention, the blind includes at least one set of upper slats and one set of lower blades, the blades of the upper assembly and the blades of the lower assembly being capable of pivoting independently from each other, a lower end element of said assembly upper, respectively an upper end member of said lower assembly being connected to the blades of the assembly to which they belong so that you can train them all successively up, respectively down.

• tout positionnement angulaire des lames de l'ensemble supérieur, c'est à dire de la position horizontale à la position verticale, et de même et indépendamment de celui-ci, tout positionnement angulaire des lames de l'ensemble inférieur ;
• le rassemblement progressif vers le haut des lames de l'ensemble supérieur par mouvement ascendant de l'élément d'extrémité inférieure de cet ensemble et/ou le rassemblement progressif vers le bas des lames de l'ensemble inférieur par mouvement descendant de l'élément d'extrémité supérieure de cet ensemble.

This Venetian blind simultaneously makes possible

• any angular positioning of the blades of the upper assembly, that is to say from the horizontal position to the vertical position, and likewise and independently of the latter, any angular positioning of the blades of the lower assembly;
• the progressive gathering up of the blades of the upper assembly by upward movement of the lower end element of this assembly and / or the progressive gathering downward of the blades of the lower assembly by downward movement of the element upper end of this set.

By rotating the top and bottom boards at angles different, a greater or lesser proportion of the radiation light is authorized to enter the demarcated enclosure, according to a more or less closed angle, i.e. a deflection of the radiation more or less important.

The heights of the upper and lower blade assemblies are variables one as a function of the other from a low minimum value to the almost the entire height of the glazing.

The height of the area between the blade assemblies upper and lower, not presenting any obstacle to vision, varies from zero value at almost the entire height of the glazing.

On the other hand the use of blades having a concavity on all their length is known. The upward orientation of the concavity of blades of the upper assembly promotes the reflection of radiation bright upwards, especially towards the ceiling. In the same way the downward orientation of the concavity of the blades of the lower assembly tends to bend the light towards the ground and is likely to avoid in a to some extent the glare of the occupants of the demarcated enclosure.

According to a preferred embodiment of the invention, the blades and the lower end element of the upper assembly on the one hand, the blades and the top end element of the bottom assembly else part, are connected to each other by vertical chain wires in scales transmitting pivoting to the blades.

In a particularly practical embodiment of the invention, the upper end member of the lower blade assembly includes an axis kept horizontal at a chosen and adjustable height.

On the other hand, the invention also relates to insulating glazing. comprising two transparent panels assembled by a frame peripheral, which enclose an interlayer of air, between which is positioned a Venetian blind as described above.

Other characteristics and advantages of the invention will appear in the following description of the attached drawing, which is a partial schematic exploded view of a double Venetian blind according to the invention, mounting elements thereof and elements insulating glass in which the blind is integrated.

The sheets of float glass 5, 6 are constituents of a glazing insulating. In some cases one or both of the sheets may be made of a transparent plastic material such as polycarbonate, poly (methyl methacrylate) or the like.

Sheets 5, 6 are assembled using a mounting frame not shown.

Is integrated into the insulating glass, i.e. in the defined space by sheets 5, 6 and their mounting frame, a Venetian blind made up an upper blade assembly 1 and a lower blade assembly 2. The upper blade assembly 1 is fixed to the horizontal upright upper of the insulating glass mounting frame, inside the blade dehydrated air, via a hollow parallelepiped profile in two parts 10a, 10b; the lower blade assembly 2 is fixed to the lower horizontal upright of the insulating glazing mounting frame by through a hollow parallelepiped profile in two parts 11a, 11b.

On the other hand, the upper blade assembly 1 comprises an element rigid end 3 connected to the blades of the assembly 1 by wires of vertical chains 7 in scales. Such ladder threads are operated from the outside according to a well-known way of operating to rotate together the element 3 and the blades of the assembly 1, of the so constantly oriented in parallel planes.

The same functional relationships exist between the blades of the lower assembly 2 and the upper end element 4 of this set 2 which are connected by vertical chain wires in ladders 8. Element 4 is mounted for rotation about its axis of symmetry longitudinal 9, each of the two ends of which is assembled to a drive element 12, only one of the two elements 12 being represented. Each of the two elements 12 can slide vertically at the interior of a hollow section 13 having over its entire height a groove which allows the connection of the axis 9 to the element 12. The hollow profiles 13 are fixed on the vertical lateral uprights of the mounting frame of the insulating glass, in the dehydrated air space. Each element 12 has a threaded bore with a vertical axis, intended to cooperate with a rod threaded 14 installed in profile 13. The lower end of the threaded rod 14 consists of a bevel gear 15 engaged with a gear conical 16 in extension of a horizontal shaft whose axis coincides with the longitudinal axis of symmetry of the hollow section 11a, 11b. This tree is capable of being rotated either by manual controls external to the glazing, either by means of a motor, in particular an electric motor, can be integrated into the hollow profile 11a, 11b. This results in a stake in rotation of the threaded rod 14, moving up or down, depending on the direction of rotation of said shaft and of the threaded rod 14, the element 12 and the upper end element 4. Although the mechanism associating the drive element 12, the profile 13, the rod threaded 14 and the bevel gears 15 and 16 is shown on the figure that on the left side of the glazing, a similar device is also present on the right side. However, in other variants, this device analog is absent on the right side.

A similar device can also be used to move vertically the lower end element 3.

Claims (5)

Blind comprising at least an upper part (1) and a lower part (2), characterized in that the upper part (1), respectively the lower part (2) can be confined in their entirety and independently of the other in an upper part, respectively a lower part of the opening for which the blind is used and in that for said upper part (1) and lower part (2), an adjustment of the degree of filtration of the differentiated light radiation is possible. Blind according to claim 1, characterized in that it comprises at least one upper blade assembly (1) and a lower blade assembly (2), the blades of the upper assembly (1) and the blades of the assembly lower (2) being able to pivot independently of each other, and in that a lower end element (3) of said upper assembly (1), respectively an upper end element (4) of said lower assembly (2 ) are connected to the blades of the assembly to which they belong so as to be able to successively drive them upwards, respectively downwards. Blind according to claim 2, characterized in that the blades and the lower end element (3) of the upper assembly (1) on the one hand, the blades and the upper end element (4) of the lower assembly (2) on the other hand, are connected to each other by vertical chain son in ladders (7), (8) transmitting the pivoting to the blades. Blind according to claim 2 or 3, characterized in that the upper end element (4) of the lower blade assembly (2) has an axis (9) kept horizontal at a selected and adjustable height. Insulating glazing comprising two transparent panels (5), (6), assembled by a peripheral frame, which encloses an intermediate blade air, between which is positioned a blind according to one of claims 1 to 4.

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