EP1389711B1 - Recessed lighting fixture - Google Patents

Description

The invention relates to a recessed luminaire in which oblong luminous bodies, in particular fluorescent tubes, are housed with the associated holding devices and ballasts in a quadrangular, frontally open housing with pairwise parallel housing walls, wherein the front opening of the housing by a flat, laterally outwardly projecting , Transparency frame disposed transparent glass or acrylic glass is sealed and a rear wall attached to the back of the housing walls closes a rear housing opening.

Such recessed lights are usually installed in machine tools, which have in the housing wall in which this recessed light is to be attached, corresponding rectangular installation openings. To attach the housing of the recessed light to the provided with the respective mounting hole housing wall of the machine tool can, the luminaire housing is provided with a circumferential leadframe, which either depending on the application, either on the outside of the machine housing seated or can be applied on the inside to fastened with screws, which protrude through both the edge of the housing of the lamp and the wall of the machine housing become.

In known recessed lights of the generic type, the housing consists of a one-piece plastic body with four right angles and in pairs parallel to each other side walls. The rear edges of the walls are each provided with inwardly projecting strips on which a rear wall can be attached. The front ends of the side walls are each provided with at right angles to the outside or inside projecting glass carrier strips on which a glass pane can be placed. As the actual fastener, a metal frame is provided which surrounds the glass support strips on all sides and is provided at the front with a peripheral cover strip for the glass pane edge and with an outwardly projecting stop bar. This stop bar is applied in each case on the outside at the edge of the recess present in the housing wall of the machine tool and there by means of screws attached. For the attachment of the lamp housing to this mounting frame special connection means are required. Each housing size requires a special thermoforming mold.

The invention has for its object to provide a recessed light of the type mentioned, the housing allows for different embodiments and / or dimensions a particularly cost-effective production both in small batches and in large batches.

This object is achieved according to the invention, characterized in that the housing walls are formed of a metal extruded profile body on the inside and near the edge of a extending over the housing height wall element at least approximately perpendicular projecting glass carrier strip for the transparency and on the same edge outside a right-angled, the has flat edge frame forming edge strip and the opposite peripheral edge is provided with a screw for screwing the rear wall.

While it is necessary in the known recessed lighting to produce a mold or thermoforming mold for all different sizes, housing sizes in any dimensions can be made quickly and inexpensively with the extruded body according to the invention, which is available by the meter. It only requires the cutting of the required sidewalls on miter and length.

While the embodiment according to claim 2 serves to functionally place an adhesive strand (also called adhesive bead) for the attachment of the translucent lens on the glass support bar, the embodiment according to claim 3 offers the advantage that the translucent glass is arranged and fixed both outside and inside the glass carrier strip can be.

Due to the embodiment according to claim 4, the advantage is achieved that a patch on the outside of the glass support strip transmitted light disk only minimally surmounted the front plane of the skirt and is bordered at least over part of its thickness.

By provided in accordance with claim 5 cross-sectional tapered zone which connects the skirt with the wall element, the skirt receives a certain flexibility, by which it is possible to adapt to any existing unevenness of a housing wall of a machine tool.

The provided according to claim 6 support rib provides a simple way to position a Lichtleit- or anti-glare screen functionally.

While the embodiment according to claim 7 brings particular advantages in terms of stability and installation, it is achieved by the embodiment according to claim 8 smooth, reaching to the rear wall inner surfaces on the housing walls.

The embodiment according to claim 9 allows the use of wire bow springs for mounting the recessed light in the wall of a machine tool housing, wherein the wire bow spring can be positively supported in the longitudinal groove.

Due to the configuration according to claim 10, not only the attachment of the translucent lens, namely a glass pane or acrylic glass on the circulating in a plane glass carrier strips of the four housing walls designed very simple, but it is also unnecessary additional connection means on the mitered cutting abutment surfaces of the four side walls because the translucent lens itself is used as the connecting element by its adhesive connection with the four glass carrier strips.

Fig. 1

die Frontansicht des Gehäuses einer Einbauleuchte;

Fig. 1a

in vergrößerter Darstellung einen Schnitt Ia-Ia aus Fig. 1;

Fig. 2

einen Schnitt II-II aus Fig. 1 in vergrößerter Darstellung;

Fig. 3

im gleichen Maßstab wie Fig. 2 nach der gleichen Schnittlinie II-II aus Fig. 1 eine andere Befestigungsart der Einbauleuchte an der Gehäusewand eines Werkzeugmaschinengehäuses;

Fig. 4

im gleichen Maßstab wie Fig. 2 nach der gleichen Schnittlinie II-II aus Fig.1 eine andere Anordnung der Durchlichtscheibe und eine gegenüber den Ausführungsformen der Fig. 2 und 3 verschiedene Befestigungsart an der Gehäusewand einer Werkzeugmaschine;

Fig. 5

in isometrischer Explosionsdarstellung die einzelnen Baugruppen der Einbauleuchte gemäß Fig. 2;

Fig. 6

einen vergrößerten Ausschnitt des Lichtleitgitters aus Fig. 5;

Fig. 7

eine isometrische Explosionsdarstellung der Baugruppen der Einbauleuchte gemäß Fig. 4;

Reference to the drawings, the invention is explained in more detail below. It shows:

Fig. 1

the front view of the housing of a recessed luminaire;

Fig. 1a

in an enlarged view of a section Ia-Ia Fig. 1 ;

Fig. 2

a section II-II Fig. 1 in an enlarged view;

Fig. 3

on the same scale as Fig. 2 according to the same section line II-II Fig. 1 another Type of mounting the recessed light on the housing wall of a machine tool housing;

Fig. 4

on the same scale as Fig. 2 according to the same section line II-II Fig.1 another arrangement of the transparency and one over the embodiments of the FIGS. 2 and 3 various attachment to the housing wall of a machine tool;

Fig. 5

in an isometric exploded view of the individual modules of the recessed luminaire according to Fig. 2 ;

Fig. 6

an enlarged section of the Lichtleitgitters Fig. 5 ;

Fig. 7

an isometric exploded view of the modules of the recessed luminaire according to Fig. 4 ;

The recessed light has a in Fig. 1 in a front view shown housing 1 with a rectangular basic shape and pairwise parallel longitudinal housing walls 2 and 3 and transverse housing walls 4 and 5.

In this case 1 are on the inside of a rear wall 6, two fluorescent tubes 10 and 11 with the associated Tube socket 12 and a ballast 13 is arranged.

The front side opening 8 formed by the side walls 2 to 5 is tightly sealed in all embodiments by means of a translucent lens 9, which may be made of glass or acrylic glass. Between the fluorescent tubes 10 and 11 on the one hand and the transparency plate 9 on the other hand, a Lichtleitgitter 14 is arranged in all embodiments, which serves as a glare shield.

The four side walls 2 to 5 of the housing 1 each consist of a metal extruded profile body 20, the in Fig. 1a in the cross section in the scale 2: 1 is shown. This extruded profile body 20 has an inner side 21 and an outer side 22 and forms a wall element 23 extending over a housing height h with the surfaces of the inner side 21 and the outer side 22 running parallel to one another.

On the inner side 21 of the wall element 23 is located at the front edge close to a right-projecting glass carrier strip 24 for the transparency 9. At the same edge is a right angle projecting, the flat frame 25 of the housing 1 forming edge strip 26 is arranged on the outside. The opposite edge 27 of the wall member 23 is provided with a screw 28, the inner surfaces are each provided with staggered thread profiles.

This screw 28 is used for screwing the bores 51 provided with the rear wall 6 on the housing walls 2 to 5.

The bottom open screw 28 is disposed on a protruding on the outside 22 thickening 38 of the wall member 23. This thickening 38 forms a shoulder, which is provided with a longitudinal groove 39.

The glass carrier strip 24 has, along its longitudinal edge facing away from the wall element 23, two beads 29 and 30 arranged symmetrically to the imaginary center plane of its cross-sectional profile, which prevent an adhesive bed 32, with which the transmitted-light disk 9 is attached to the glass carrier strip 24, from emerging beyond the peripheral edge.

From the front end face 31 of the wall element 23 or the edge strip 26, the glass carrier strip 24 has a distance h1 which is smaller than the thickness d of an outside on the glass support strips 24 patched translucent 9th

At a distance h2 , which corresponds to the thickness d1 of the light guide 14, a support rib 35 is arranged below the glass support strip 24 on the inner side 21 of the wall element 23 and runs parallel to the glass support strip 24. This support rib 35 serves as a support for the light guide 14th

The edge strip 26 is connected via a between two notches 33 and 34 lying cross-sectional tapered zone 36 with the wall member 23 so that it receives a certain flexibility and can adapt to the possibly uneven inner or outer surface of the edge of a mounting hole 40 of the housing wall 41 of a machine housing if to their attachment, as in the 3 and 4 is shown, screws 45 are used with or without nuts 46.

In the in the Fig. 2, 3 and 4 in scale 1: 1 reproduced sectional views of various embodiments or applications, the wall element 23 has a Thickness d2 of 2.5 mm and height h of 57.5 mm. At a thickness d of 5 mm, the height h1 is 3 mm, with the two beads 29 and 30 each being 0.5 mm thick. The height h2 corresponding to the thickness d1 of the light guide grille 14 is 10 mm in this exemplary embodiment.

With these dimensions and the features described above, the extruded profile body 20 is produced by the meter in a suitable aluminum alloy and kept in stock. To produce a housing 1 for a recessed luminaire, the required four housing walls 2 to 5 are each mitred from the extruded profile body 20 in the appropriate length and in the in Fig. 1 assembled manner shown, wherein initially one of the short side walls 4 or 5 can be omitted. The other three walls are then first screwed onto the already equipped with the bulbs rear wall 6.

The rear wall 6 is provided on its longitudinal sides in each case with a perpendicularly to the front (in the picture above) curved edging strip 16 and 17 whose height h3 at least approximately the height h4 provided with the screw 28 thickening 38 of the wall element 23 corresponds, so that their Edge edges 18, 19 each flush with the approach formed by the thickening 38.

The two Einfaßleisten 16 and 17 in the assembled state, the outer thickening 38 of the two longitudinal side walls 2 and 3, so that the fastening screws 50, for example, the size M4, through corresponding holes 51 in the rear wall 6 from below or back into the screw 28th can be screwed.

It has already been described above that the rear wall 6 is already equipped prior to assembly with the side walls 2 to 5, with the fluorescent tubes 10 and 11, the base 12 and the ballast 13.

In this preassembled state, the one narrow side wall 4 or 5 by screws 45 which are screwed into its screw 28 from below, with the rear wall 6 is firmly connected.

From the side of the missing in this state short side wall 4 or 5 ago, then the Lichtleitgitter 14 is inserted and then also the missing short side wall 4 or 5 in position and screwed from below.

The housing 1 must be provided in this state only with the transmitted light disk 9. For this purpose, the mitered cut edges 55 of the individual side walls are pressed together by suitable means. In this compressed state, a circumferential, self-contained adhesive bead or an adhesive strand is applied to the top or outside of the glass carrier strips, on which the transmitted-light disk 9 is then pressed or pushed with its edge surfaces until it assumes the correct position. By this impressions of the translucent lens 9 in the adhesive bead or the adhesive strand is the already mentioned adhesive bed 32. The usually fast-curing adhesive then establishes the connection between the translucent lens 9 and the individual side walls 2 to 5 ago, whereby the further cohesion of mitred cut abutting edges 55 is ensured by this adhesive connection with the transparency plate 9.

However, this procedure just described applies only to the embodiment of Fig. 4 in which the Transmitted light disk 9 is mounted on the outside of the glass support strips 24. In the embodiments of the FIGS. 2 and 3 on the other hand, the translucent lens 9 is arranged on the inside of the glass carrier strips 24 and embedded in the circumferential adhesive bed 32 which is also located inside.

In this arrangement of the translucent lens 9 on the inside of the glass support bars 24, it is necessary to use the translucent lens 9 before screwing the rear wall, since this is only possible with the rear open housing.

In this arrangement, the transmitted light disk 9 and the interposed between the transparency plate 9 and the support ribs 35 in space is reduced to about half. Therefore, it is necessary, also lying on the outer sides of the Lichtleitgitters 14 ribs 36 (see Fig. 6 ) accordingly, so that in the Fig. 2 and 4 shown position of the Lichtleitgitters 14 in the housing 1 results.

As the Fig. 2, 3 and 4 show, the recessed luminaire in the finished state in different ways in installation openings 40 a housing wall 41 of a machine tool used and attached.

In the arrangement of Fig. 2 the recessed light is inserted from the outside into a mounting hole 40 of the housing wall 41 of a machine tool and by means of wire bow springs 43, which are supported in the longitudinal grooves 39 and the housing wall 41, attached.

In this arrangement, the edge strips 26 are on the outside on the edge of the mounting hole 40 of the housing wall 41. Expediently, the translucent lens 9 is arranged on the inside of the glass carrier strips 24 so that it does not protrude into the plane of the outer surface 42 'of the wall 41. This is also in the arrangement according to Fig. 3 the case.

In this arrangement, the Fig. 3 the edge strips 26 are each fastened by means of screws 45, which are screwed directly into threaded holes 47 of the housing wall 41.

In the arrangement according to Fig. 4 the recessed light is arranged so that the edge strips 26 rest against the inner surface 42 of the housing wall 41 and at this in each case by Bolts 45 and nuts 46 are attached. It can be seen that in this arrangement arranged on the outside of the glass support bars 24 transmitted light disk 9 is still within the mounting hole 40 with its outer surface, so the plane of the outer surface 42 'of the housing wall 41 does not dominate, resulting in a machine tool for their safety of large Advantage is. For the same reason, in arrangements of FIGS. 2 and 3 the transmitted-light disks 9 are respectively arranged on the inner sides of the glass carrier strips 24.

Claims (10)

1. Recessed lighting fixture, in which in a rectangular housing (1), which is open on the front side, elongated lighting bodies, in particular fluorescent tubes, are accommodated in pairs parallel to the housing walls (2 to 5) with the associated mounting devices (12) and ballast (13), wherein the front opening (8) of the housing (1) is closed tightly by a transilluminated disc (9) made of glass or acrylic glass arranged inside a flat contacting frame (25) projecting laterally outwards, and a rear wall (6) secured to the rear of the housing walls closes a rear housing opening,
   characterised in that
   the housing walls (2 to 5) are formed by a metal extruded profile body (20), which on the inside and in the front edge vicinity of a wall element (23) extending over the height of the housing (h) has an at least almost right-angled projecting glass support strip (24) for the transilluminated disc (9) and on the same edge on the outside has a right-angled extending edge strip (26) forming the flat contacting frame (25) and its opposite edge (27) is provided with a screw channel (28) for screwing on the rear wall (6).
2. Recessed lighting fixture according to claim 1, characterised in that glass support strip (24) along its edge facing away from the wall element is provided with at least one bead (29, 30).
3. Recessed lighting fixture according to claim 2, characterised in that the glass support strip (24) has a symmetrical cross-sectional shape.
4. Recessed lighting fixture according to one of claims 1 to 3, characterised in that the glass support strip (24) has a distance (h1) from the end face (31) of the wall element (23), which is smaller than the thickness (d) of the transilluminated disc (9).
5. Recessed lighting fixture according to one of claims 2 to 4, characterised in that the edge strip (26) is connected by at least one cross-sectionally tapered area (36) to the wall element (23).
6. Recessed lighting fixture according to one of claims 1 to 5, characterised in that the wall element (23) on the side of the glass support strip (24) is provided with a support rib (35) running parallel thereto.
7. Recessed lighting fixture according to one of claims 1 to 6, characterised in that the rear wall (6) on both longitudinal sides has an edge strip (16, 17) surrounding the wall element (23) in the region of the screw channel (28).
8. Recessed lighting fixture according to claim 7, characterised in that the screw channel (28) is arranged in a thickened part (38) of the wall element (23) projecting on the outside (22), which is at least almost flush with the edge of the edge strip (16, 17) of the rear wall (6).
9. Recessed lighting fixture according to claim 8, characterised in that the thickened part (38) on the outside (22) of the wall element (23) forms a shoulder which is provided with a longitudinal groove (39).
10. Recessed lighting fixture according to claim 1 or one of claims 2 to 9, characterised in that the transilluminated disc (9) is secured by means of a bed of adhesive (32) to the glass support strips (24) of all four housing walls (2 to 5), which adhesive attaches in particular to the butt joints of the bevelled glass support strips (24).

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