FR3043246A1 - RADIO-PROTECTIVE JOINERY - Google Patents

Abstract

Radio-protective joinery (10), comprising at least one radioprotective glazing (40) held by a frame, characterized in that the frame comprises at least one radioprotection shield (60; 80) partially superimposed on the glazing, formed of a multilayer complex consisting of at least one core (100) of a material with high absorption of ionizing radiation, sandwiched between two outer skins (101, 102), the complex comprising at least one curved zone (106, 107; without detachment in this zone between the outer skins and said absorbent material.

Description

Radio-protective carpentry

The present invention relates to radiation protection against ionizing radiation such as X-rays or gamma rays.

Many facilities used in the medical field or industry use ionizing radiation devices that require the protection of operators.

It is thus known to use opaque panels or shutters based on lead to provide this protection. The use of such panels or shutters is not entirely satisfactory insofar as it completely obscures the light.

The trend is to use more and more lead-based glass or other materials with high absorption of ionizing radiation.

Radiation tightness must be ensured around the glazing, which leads to the return of leaded shields in the form of flat plates, leading to a very often unsightly result.

There is therefore a need to benefit from radioprotective joinery, especially external joineries, in the form of sashes or fixed frames, which are at the same time aesthetic, luminous, effective in terms of absorption of ionizing radiation, and economical manufacturing. .

US Pat. No. 7,598,460 discloses a door providing protection against radiation comprising a small glazing unit. The protection is provided by an absorbent material in the form of flat plates. The structure of the door at the glazing is not detailed. The invention aims to meet the need mentioned above and it achieves it through a radio-protective joinery, comprising at least one radio-protective glazing maintained by a frame, characterized in that this frame comprises at least one shield of radioprotection partially superimposed on the glazing, formed of a multilayer complex consisting of at least one core of a material with high absorption of ionizing radiation sandwiched between two outer skins, the complex comprising at least one curved zone without delamination in this zone between the outer skins and said absorbent material.

The arched zone can thus maintain in the curved zone a thickness substantially equal to that of the complex outside the curved zone. The invention makes it possible, by using such a multilayer complex, to closely follow, if desired, the external profile of the surface facing the rest of the frame, with the advantage of being able to obtain the covering of the glazing just necessary. to obtain the desired radiation-proofing, while keeping the light as light as possible. The absence of delamination between the outer skins and the core, which are preferably assembled by gluing, can be obtained for example by maintaining a sufficiently large radius of curvature in the curved zone and / or by bending the complex already. assembled in the plane state. The bending is preferably less than 60 ° (the angle turns the complex when observed in cross section due to bending), and can be for example between 30 and 60 °, being for example close to 45 °. The invention offers new aesthetic possibilities in the field of radiation protection.

The material with high absorption of X-rays may comprise lead, in particular be made of a sheet of lead.

The outer skins are preferably metallic, being advantageously made of aluminum or aluminum alloy.

Preferably, the shield has a bevelled edge. This further reduces the impact of the shield on the brightness of the glazing. In particular, it is aesthetic that the beveled edge is angled at the vertex chosen so that the edge of the shield extends perpendicularly to the plane of the glazing.

The shield can be doubly bent toward the chassis. In particular, the shield may have a flat central portion and side portions extending obliquely diverging away from the central portion.

The shield may be fixed to the central casement of a semi-fixed opening so as to cover the glazing of the two openings, including a window or French window. It may be advantageous in this case that the shield has a flat central portion and side portions extending obliquely diverging away from the central portion, each coming to overlap the glazing of the corresponding opening.

When the shield has at least one lateral portion extending obliquely with respect to a main flat part, this lateral part may come opposite a close-fitting, substantially conforming to the slope thereof, preferably without compressing it.

Preferably, the shield is painted on the edge. This allows to obtain if desired a continuity of appearance between the back of the shield and its edge, or on the contrary to put it in value on the aesthetic level. It can also make it possible to isolate the edge of the shield from the outside in a simple and economical manner when the material with high absorption is a material whose use is regulated, such as lead.

Preferably, the shield is glued to the rest of the frame. In this case, it is advantageous that the facing faces of the shield and the remainder of the frame used for the assembly are constituted by the same material, in particular the same metal, for example aluminum, since this limits the shear stresses due to to dilatations, and maintains the long-term reliability of bonding when the frame is exposed to large temperature variations, which is potentially the case for an opening opening to the outside.

The frame preferably comprises an assembly of aluminum or aluminum alloy sections with the interposition of thermal insulators. These provide a thermal break, allowing the use of carpentry outdoors. The invention will be better understood on reading the description which follows, of an example of non-limiting implementation thereof, and on examining the appended drawing in which: - Figure 1 is a sectional view transverse of an opening made in accordance with the invention, and - Figures 2 and 3 show details of embodiment of the multilayer complex of Figure 1.

FIG. 1 shows a window 10 made according to the invention. This window comprises two openings 20 and 30, one said principal, left in Figure 1, and the other said semi-fixed, right. The invention is however not limited to external joineries constituted by double-opening windows, and applies equally to windows having only one opening, sliding or rotating, to glass doors, to French windows, to windows as fixed frames, composite assemblies and flat or curved glazings. The invention is not limited to glazing having particular structures, and concerns both doubles and single and triple glazing, among others, and glazing more or less reinforced against burglary and / or ensuring the protection of people. The glazings may be totally transparent, tinted or not, depolis, screen-printed or otherwise decorated, for example coated with films or semi-reflective coatings, electrical conductors, electro-chrome, photochromic or other. The glazings may comprise mineral or synthetic glass, in particular polycarbonate, loaded in its mass with a radioprotective material, that is to say a material of high atomic number, typically greater than or equal to 50, more preferably 56, even better at 82, able to strongly absorb ionizing radiation such as X-rays or gamma rays. Among these materials, mention may be made of tin, barium, tungsten, lead, bismuth, in alloyed or unalloyed form, and their oxides and salts. The invention is preferably applied to exterior joinery, but is also suitable for interior joinery. The following example relates to a carpentry known as "aluminum", by the use of this material for the realization of the frame, but the invention is also of interest for joineries called "PVC" or "wood" or d ' other materials.

Each opening 20 or 30 comprises a glazing 40 which is radioprotective, and preferably also thermal, burglar and protective of people.

The frame of the main opening 20 comprises a profile 21, preferably made of metal, in particular aluminum, on which is fixed a plastic section 22, for example polyamide, carrying a bumper with sealing lip 23 integrated, applying on the glazing. The profile 22 allows a thermal break.

A first seal 24 applied on the inner side of the glazing 40 is carried by the profile 21. A second seal 25, also carried by the profile 21, seals the closure on the inside. The semi-fixed leaf 30 comprises a profile 31, preferably of metal, in particular aluminum, ensuring the maintenance of the glazing 40 with the interposition of a first seal 32. This section 31 carries a central battue composed of an inner profile 34, preferably made of metal, in particular aluminum, and an outer profile 35, also preferably of metal, in particular aluminum, connected by plastic profiles 36 ensuring a thermal break. A second seal 36 is carried by the profile 31, and a seal-seal with integrated sealing lip 37, via a section 38 of plastic.

The inner profile 34 of the central battue serves to support the joints 25 and 36 when the window is closed, and it is fixed on the profile 31 by means of screws 39.

The window comprises a frame 50, only the part thereof associated with the semi-fixed opening 30 being shown.

The frame 50 comprises inner 51 and outer 52, preferably metal, particularly aluminum, joined by plastic profiles 54 ensuring a thermal break.

On the side of the frame 50, the opening 30 comprises a profile 60 carrying a first seal 61 applying to the glazing 40 and a second seal 62 applying to the frame when the door is closed. The profile 60 also carries a profile 64 for maintaining a sealing lip seal 66 integrated.

In this example, all the windshields have an external wall 70 extending obliquely, substantially at 45.degree., Above the sealing lip and substantially up to the level of the external face of the adjacent outer profile, particular the profile 35 in the case of closed screens with the lips 23 and 37.

According to the invention, the window comprises at least one radioprotection shield, and in the example considered the window comprises a central shield 60 fixed on the central battue and a shield 80 fixed to the periphery of the glazing 40 of each opening 20 or 30.

Each of these shields 60 and 80 is formed according to the invention with a multilayer complex comprising a core 100 and skins 101 and 102 covering the core, as can be seen in particular in FIG. 2.

The skins 101 and 102 are joined to the core 80 by adhesive layers 104, which may be continuous or discontinuous. The core 100 is formed of a high density material, absorbing X-rays, in this case a lead sheet in the example in question, of thickness e e for example between 0.5 and 5 mm, depending on the intensity of the radiation to be stopped and the density of the material used.

The skins 101 and 102 are made in the example considered aluminum, but other metals are usable, such as steel or brass, for example.

The skins 101 and 102 are preferably in the same metal.

The shield 60 is doubly bent at 106 and 107, and thus has a substantially planar central portion 110 and side portions 111 and 112 which each extend obliquely with respect to the central portion 110 with an angle alpha of preferably between 30 and 60 °, as seen more particularly in FIG.

The bending does not affect the cohesion of the multilayer complex and does not cause detachment of the core 100 and the skins 101 and 102. The thickness e of the complex thus remains constant at the transition between the central 110 and lateral 111 and 112.

A layer of adhesive 105 ensures the attachment of the shield 60 by the inner face of the central portion 110 on the flat outer face of the profile 35. This attachment may be reinforced by screws not shown, if necessary.

The lateral parts 111 and 112 extend as close as possible to the oblique walls 70 of the windshields, substantially parallel thereto, thus limiting the concealment of the glazing 40, while ensuring a cover over a width sufficient to shield radiation.

The lateral portions 111 and 112 each have a beveled edge 130, as can be seen in particular in FIG. 3. The angle of the bevel is chosen so that the end edge extends along a plane P parallel to the normal N to the portion 110, and therefore substantially perpendicular to the corresponding glazing 40. This allows to further limit the occultation of it and contributes to the aesthetics of the shield. The latter can be painted on the end edge.

The shield 80 is similar to the shield 60, except that it is bent at 108 only on the side of the adjacent pane 40.

The frame 50 can carry, on the inside, a shield 160 having a multilayer structure such as the shields 60 and 80, but completely flat, superimposed both on the shield 80 and on an adjacent wall M, thus avoiding radiation leakage at the level of the junction between the frame and the wall. The invention is of course not limited to the example just described. In particular, the structure of the frame can undergo modifications, in particular as regards the shape of the profiles, their method of assembly, the materials used, the shape of the joints, the manner in which they are maintained, and the shape of the or shields.

Claims (14)

1. Radio-protective joinery (10), comprising at least one radioprotective glazing (40) held by a frame, characterized in that this frame comprises at least one radioprotection shield (60; 80) partially superimposed on the glazing, formed a multilayer complex consisting of at least one core (100) of a material with high absorption of ionizing radiation, sandwiched between two outer skins (101, 102), the complex comprising at least one curved zone (106, 107; 108) without detachment in this area between the outer skins and said absorbent material. 2. Carpentry according to claim 1, the material with high absorption of X-rays comprising lead. 3. Carpentry according to claim 2, the material with high absorption of X-rays consisting of a lead sheet. 4. Carpentry according to any one of the preceding claims, the outer skins (101, 102) being metallic. 5. Carpentry according to the preceding claim, the outer skins being aluminum or aluminum alloy. 6. Carpentry according to any one of the preceding claims, the shield having a bevelled edge (130). 7. Carpentry according to the preceding claim, the bevelled edge being at an angle to the vertex chosen so that the edge of the shield extends perpendicularly to the plane of the glazing. 8. Carpentry according to any one of the preceding claims, the shield (60) being doubly curved toward the chassis. 9. Carpentry according to the preceding claim, the shield (60) being fixed to the central casement of a semi-fixed opening so as to overlap the glazing of the two openings. 10. Carpentry according to any one of the preceding claims, the shield having at least one side portion (111; 112) extending obliquely relative to a main flat part (110), this lateral part facing a bumper -close (70) substantially marrying the slope thereof, preferably without compressing it. 11. Carpentry according to any one of the preceding claims, the shield being painted on the edge. 12. Carpentry according to any one of the preceding claims, the shield being stuck on the rest of the frame. 13. Carpentry according to claim 12, the shield and the frame having surfaces joined together made of the same material, including the same metal, preferably aluminum. 14. Carpentry according to any one of the preceding claims, the frame comprising an assembly of aluminum profiles or aluminum alloy with interposition of thermal insulators.