EP0021384B1 - Rigid profile grid for long extended reflector lamps - Google Patents

Abstract

1. A reflector member grid, which is rigid in itself, for reflector grid lighting arrangements having elongate lamps, comprising substantially V-shaped bar members (2) which are arranged transversely with respect to the longitudinal direction of the lamp at spacings from each other and which have a reflective coating on the outside and which have preferably parabolically curved limb portions, characterized in that the bar members (2) are secured to at least one carrier rail member (3) which passes through punched-out openings (6) disposed in opposing relationship in the limb portions (4, 5) of the bar members (2).

Description

The invention relates to a rigid mirror profile grid for mirror grid lights with elongated lamps, with approximately V-shaped slats arranged at intervals at right angles to the lamp longitudinal direction and mirrored on the outside with preferably parabolically curved legs.

Luminaires for mainly elongated tube lamps, which are equipped with such luminaire glare protection screens, have the highest visual comfort at certain viewing angles due to the absence of glare. With the right choice of the parabolicity of the lamella legs and the greatest possible degree of purity of the mirrored leg surfaces, the inherent luminance of such luminaires is also reduced to a minimum.

A disadvantage of the known grids of the type mentioned are the high manufacturing costs. As a result, despite the poor lighting quality, cheaper lights with high intrinsic luminance and diffuse radiation characteristics are predominantly installed. The high manufacturing costs of the known grids are based on the fact that the grids consist of longitudinal and transverse slats which have to be processed by means of punching and shaping tools in such a way that they can be put together to form grids of the type mentioned at the beginning. As a result of the longitudinal and transverse slats, there are complicated penetrations between the slats. These penetrations require expensive tools and locking devices, which are complex to assemble and also make production more expensive. In addition, the known grids are not very variable, so that desired changes in the fade-out angle or the radiation characteristic require modified manufacturing tools.

In the mirror profile grids of the type mentioned at the beginning, the longitudinal slats formed parts of the mirror reflector lamp. However, a head reflector is also required.

The object on which the invention is based is to provide a mirror profile grid for mirror grid lights which is rigid in itself and which, owing to a different structure, can be manufactured more easily and inexpensively.

According to CH-A-557 938, a ceiling cladding with lamellae is known, in which the lamellae are arranged at intervals and are held on at least one punching provided in the legs of the lamellae by a tensioned cable. The known arrangement is therefore not a rigid mirror profile grid for mirror grid lights. In addition, the slats consist of plate-shaped, slightly curved bodies. The problem of how the complicated penetrations of the slats can be avoided in the known grids is not addressed.

The same applies to the arrangement known from FR-A-23 82 647. Here, too, lamellae are provided as an object that differs from a rigid mirror profile grid for mirror grid lights and is designed as plates pointing vertically downwards.

From DE-C-803 229 a glare protection for fluorescent lamps is known, in which plate-shaped lamellae, which are approximately crescent-shaped, are connected via a holding rod. Apart from the fact that this arrangement is not a mirror profile grid of the type mentioned, the grid known from this publication is also not rigid. The mounting of the approximately half-moon-shaped anti-glare screens in the known arrangement takes place in that the anti-glare screens are attached to the fluorescent lamp and are held at two opposite points on the lamp. The holding rod then serves to hold the anti-glare panes together loosely, these only being immovable in their mutual distances, but otherwise movable relative to the holding rod. The mutual distances are fixed by recesses in the holding rod.

According to the invention it is provided that the lamellae are locked on at least one support rail which is provided in the limbs of the lamellae and is provided opposite. The punched-out areas are preferably provided in the vicinity of the end-side lamella ends. The mounting rails are preferably arranged in pairs. By lining up the slats on the mounting rails at intervals that can be calculated and determined based on the required blanking angle and the height of the slats, anti-glare louvres can be produced that can also be influenced in the parabolic nature of the slat leg surfaces during assembly. An advantage of the invention is that the lamellae and support rods are prefabricated and stored and can then be assembled in a simple manner to form grids for different blanking angles and parabolics.

The punched-out areas in the leg surfaces, which are adapted to the outer contour of the mounting rails, can have simple geometric shapes and can therefore be produced without problems. The cross sections of the support rods are basically arbitrary. The punched-out areas can be attached in such a way that the mounting rails either lie completely in the area of the slat surfaces or protrude beyond the sides of the slat edges.

The lamellae can be locked on the support rods in a simple manner by deforming the cross-section of the support rails in their areas encompassing the lamellae, for example by squeezing them. Another possibility of locking is to provide separate locking elements, such as spacer clamps, clips or the like, between the legs of the individual slats, that is to say in the area invisible to the viewer of the grid in the built-in form.

Another important advantage of the grid according to the invention is that it is now possible to vaporize the entire grid under vacuum with pure aluminum due to the elimination of the "longitudinal lamella" which is common in the known grids. A surface quality of the reflector surfaces of the grid can thus be achieved which exceeds the surface quality of, for example, anodized aluminum sheet. The possibility of vapor deposition also allows the production of grids from materials other than the previously used material. While aluminum was previously used for screens, the slats can now also be made of steel, which leads to a reduction in material prices. Another advantage of using steel is the higher stability, which makes it possible to use mirrored anti-glare screens for ball-proof sports facility lights.

Another advantage of the invention is the possibility to use for the production of the slats mirrored or mirrorable tape or plate material, which is painted on the other side, preferably black diffuse or painted before processing, so that after processing reflect the back or inside of the slats only weakly or not at all. When using this grid in mirror grid lights, which are equipped with mirrored head and side reflectors arranged above and next to the grid, the slat surfaces facing these reflectors are only reflected so weakly that no light contrasts are visible even on the screens of data display devices.

In a further embodiment of the invention it can be provided that the mounting rails are designed with a curved shape. For luminaires with anti-glare louvres that are continuously installed in series to form light strips, this arrangement of the slats on curved support rails is particularly advantageous, as this enables both horizontal and vertical curved transitions. Furthermore, grids can also be created for round luminaires in this way.

The size of the grid according to the invention can be such that a grid is attached below a plurality of light sources arranged side by side or one behind the other. The optically closed character of the grid ceiling can be loosened, for example, by arranging the grid elements offset by 90 °, so that, for example, a chessboard-like ceiling design is created, the chessboard-like arrangement not necessarily requiring square grid elements.

• Fig. 1 eine schematische perspektivische Darstellung eines Ausführungsbeispiels des Rasters gemäß der Erfindung;
• Fig. 2 eine perspektivische Darstellung einer Rasterlamelle des Rasters gemäß Fig. 1;
• Fig. 3 mehrere mögliche Querschnittsformen der Tragschienen;
• Fig. 4 eine Unteransicht von mehreren jeweils um 90° gegeneinander versetzt angeordneten Rastern gemäß der Erfindung;
• Fig. 5 einen Schnitt längs der Linie V-V in Fig. 4, wobei im linken Teil der Zeichnung noch eine Leuchte dargestellt ist;
• Fig. 6 eine Ausführungsform der Erfindung, bei der die Tragschienen - bezogen auf die Horizontale - gekrümmt sind;
• Fig. 7 eine weitere Ausführungsform, bei der die Tragschienen - bezogen auf die Vertikale - gekrümmt sind;
• Fig. 8 ein weiteres Ausführungsbeispiel des Rasters mit kreisförmigen Tragschienen, welches sich für ringförmige Leuchten eignet.

Further details, advantages and features of the invention emerge from the above patent claims and the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

• Figure 1 is a schematic perspective view of an embodiment of the grid according to the invention.
• FIG. 2 shows a perspective illustration of a grid lamella of the grid according to FIG. 1;
• 3 shows several possible cross-sectional shapes of the mounting rails;
• 4 shows a bottom view of a plurality of grids, each offset by 90 ° from one another, according to the invention;
• FIG. 5 shows a section along the line VV in FIG. 4, a lamp being shown in the left part of the drawing;
• Fig. 6 shows an embodiment of the invention, in which the mounting rails - with respect to the horizontal - are curved;
• Fig. 7 shows a further embodiment in which the mounting rails - with respect to the vertical - are curved;
• Fig. 8 shows another embodiment of the grid with circular support rails, which is suitable for ring-shaped lights.

The grid shown in FIG. 1 and designated overall by 1 has a plurality of lamellae 2 which are held at intervals on mounting rails 3. For this purpose, the lamellae 2 in their legs 4 and 5 (FIG. 2) have punched-out areas 6 which are gripped by the support rails 3. The legs 4 and 5 are curved parabolically. To fasten the slats 2 on the mounting rails 3, the cross section of the mounting rails 3 is cross-sectionally deformed in the areas 7 enclosed by the slats, for example by a squeezing process, so that the outer periphery deformed in this way bears firmly against the inner edge of the punched-outs 6. Another possibility of locking would be to provide separate locking devices in the areas 7. The slats 2 and the support rods 3 are made of mirrorable material. After the lamellae 2 have been lined up and locked onto the supporting rods 3, they can be vacuum-coated with pure aluminum in such a way that the surfaces facing the viewer, namely the outer surfaces of the essentially V-shaped lamellae and also the visible surfaces the support rods 3 are mirrored. The inner surfaces of the slats 2 are matte black.

As can be seen from FIG. 3, the support rods 3 can have a wide variety of cross-sectional shapes, for example a square hollow profile 3a, a triangular hollow profile 3b, a rectangular hollow profile 3c, a round full profile 3d, a square full profile 3e, a triangular full profile 3f, a rectangular full profile 3g, a T-shaped rolling or rolling profile 3h, a V-shaped rolling or rolling profile 3i, a V-shaped rolling or rolling profile with a rounded edge 3k or an angular rolling or rolling profile 31. There is also the option of Form flanks of profiles 3b, 3f, 3i or 3k in a parabolic curve.

As can be seen from FIG. 4 and FIG. 5, for example square grid 8 according to the invention can be assembled next to one another in a checkerboard manner in such a way that grid 8 and corresponding grid 8 'are alternately provided with slats 2, 2' offset by 90 °. FIG. 5 shows how a tube lamp 9 with a reflector 10 can be arranged above such a grid arrangement.

6 to 8 support rails are shown with a curved course. 6, lamellae 2 are attached to mounting rails 11, which are horizontally curved in accordance with the intended installation position of the grid. 7, slats 2 are lined up on support rails 12, which are curved in the vertical direction in accordance with the position of use of the grid. Fig. 8 finally shows slats 2, which are lined up on circularly curved support rails 13a, 13b and locked there.

Claims (9)

1. A reflector member grid, which is rigid in itself, for reflector grid lighting arrangements having elongate lamps, comprising substantially V-shaped bar members (2) which are arranged transversely with respect to the longitudinal direction of the lamp at spacings from each other and which have a reflective coating on the outside and which have preferably para- bolically curved limb portions, characterised in that the bar members (2) are secured to at least one carrier rail member (3) which passes through punched-out openings (6) disposed in opposing relationship in the limb portions (4, 5) of the bar members (2).

2. A grid according to claim 1 characterised in that the openings (6) are provided in the vicinity of the ends of the bar members and the carrier rail members (3) are arranged in pairs.

3. A grid according to claim 1 or claim 2 characterised in that the carrier rail members (3) are disposed completely in the region of the surfaces of the bar members (2).

4. A grid according to claim 1 or claim 2 characterised in that the carrier rail members are disposed partially in the region of the surfaces of the bar members (2).

5. A grid according to one of claims 1 to 4 characterised in that, in order to provide the securing action, the carrier rail members (3) are deformed in cross-section, in their regions (7) which pass through the bar members (2).

6. A grid according to one of claims 1 to 4 characterised in that separate securing elements are provided for securing the bar members (2) to the carrier rail members (3).

7. A grid according to one of claims 1 to 6 characterised in that the surface of the bar members which is opposite to the reflectively coated surface of the bar members is matt, preferably black.

8. A grid according to one of claims 1 to 7, characterised in that the carrier rail members (3) comprise material which is provided with or which can be provided with a reflective surface layer.

9. A grid according to one of claims 1 to 8 characterised in that the carrier rail members (11, 12, 13a, 13b) are of a curved configuration.

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