GB2249432A

GB2249432A - A ventilation cover for a module receiving aperture of a housing

Info

Publication number: GB2249432A
Application number: GB9122963A
Authority: GB
Inventors: Klaus-Dieter Bovermann; Juergen Zachrai
Original assignee: Rittal Werk Rudolf Loh GmbH and Co KG
Current assignee: Rittal Werk Rudolf Loh GmbH and Co KG
Priority date: 1990-11-02
Filing date: 1991-10-29
Publication date: 1992-05-06
Anticipated expiration: 2011-10-29
Also published as: DE4034774C2; GB2249432B; GB9122963D0; DE4034774A1

Abstract

A ventilation cover for the module receiving aperture of a housing is designed in the pattern of a base width and base unit of height. To cover partial openings ventilation front panels (10) are provided with louvres (11) and louvre openings (12) disposed therebetween, which in width correspond to the base width of the receiving aperture, and which in height correspond to the base unit of height. The ventilation front panels (10) adjacent the lower edge thereof have at least two fixing receiving means (13) which are arranged at a spacing (A) from each other corresponding to a whole multiple of the distribution of threaded holes in securing bars, and the rear of the ventilation front panels (10) are provided with blind-hole-like screw receiving means (14) outside the openings (12) between the louvres (11). <IMAGE>

Description

1 22494-52 1 A VENTILATION COVER FOR A MODULE RECEIVING APERTURE OF A

HOUSING The invention relates to a ventilation cover for a module 5 receiving aperture of a housing.

Such a housing may have a receiving aperture accessible at the front side, the aperture having a base width and a height corresponding to a whole multiple of a base unit of height. Transverse carriers can be used to subdivide the receiving aperture into partial openings, the heights of which are a smaller whole multiple of the base unit of height, and the transverse carriers can be provided on the front with a T-slot into which a threaded hole bar is pushed, the threaded holes of which are arranged in a given distribution.

Printec circuit boards can be inserted into a housing of this kind with a module receiving means. The printed circuit boards can be guided on guide rails which are joined to the transverse carriers. The printed circuit boards bear front panels which are screwed to the threaded hole bars accommodated in the T-slots. Therein, the printed circuit boards can extend over the entire height of the receiving aperture of the module housing. The receiving aperture can be sub-divided into partial openings, as well, by the aid of further transverse carriers, whereby partial openings are created in the housing which can also receive other devices such as ventilators or cooling apparatus or which merely serve as ventilating chambers.

According to the invention there is provided a ventilation cover for a module receiving aperture of a housing which is accessible at the front side, the aperture having a base width and a height corresponding to a whole multiple of a base unit of height, wherein transverse carriers can be used to sub-divide the receiving aperture into partial openings, the heights of which are a smaller whole multiple of the base unit of height, the transverse carriers being provided on the front with a T-slot into which a bar having threaded holes therein can be pushed, and wherein the ventilation cover comprises ventilation front panels with louvres and louvre openings interposed therebetween to cover the partial openings, the width thereof corresponding to the base width of the receiving aperture and the height corresponding to the base unit of height, each ventilation front panel adjacent to the lower 2 edge bearing at least two fixing receiving means which are arranged at a spacing from each other which corresponds to a whole multiple of the distribution of the threaded holes in the bars, and the rear of the ventilation guide plates, outside the louvre openings, being provided with screw receiving means.

Thus the invention can provide a ventilation cover for partial openings of varying size for the module reebiving aperture of a housing, the partial openings requiring only one integrally formed part which can be fixed like a front panel. Thus ventilation front panels with louvres and louvre openings interposed therebetween are provided to cover the partial openings, the width thereof corresponding to the base width of the receiving aperture, and the height corresponding to the base unit of height. The ventilation panels adjacent to the lower edge bear at least two fixing receiving means which are advantageously arranged at a spacing from each other, which corresponds to a whole multiple of the distribution of the threaded holes in the bars. The rear of the ventilation guide plates, outside the louvre openings, are prefera bly provided with blind-hole-like screw receiving means.

The size of the ventilation front panels depends on the 20 basicstructural module of the receiving apertures of the module housing, so that the ventilation front panels can be fixed like normal front panels, wherein they can be juxtaposed both in width and in height. The partial receiving means merely have to be divided up by transverse carriers in the pattern of the base unit of height, so as to 25 be able to cover the opening of the module housing provided for ventilators and the like. The blind-hole-like screw receiving means which are provided at the rear of the ventilation front panel are used for fixture to a structural components carrier plate which can be fixed in a switch cabinet like a complete structural components carrier.

The ventilation front panel is designed according to one embodiment in such a way that the louvres are disposed approximately at an angle of 450 to the rear of the ventilation front panels. The louvres are chamfered at the ends. The fixing receiving means are square in cross-section, and are arranged at a spacing from the lower edge corresponding to the distance of the threaded holes of the threaded hole bar from the lower edge of the transverse carriers. The ventilation front panel can then be integrally joined with an opening, ,i 3 has the dimensions of the base width and base unit of height, and is delineated by transverse carriers. The base width of the opening can therein be the same as the width of the opening of a so called 1/2-1911-module housing.

If the housing is one known as a 1911-module housing, then it can be provided that the receiving aperture has a width which corresponds to twice the base width, and a partial opening which extends across the entire width of the receiving means opening and a base unit of height is covered by two juxtaposed ventilation front panels.

Access to the fixing receiving means of the ventilation front panel is not adversely affected by the louvre according to one embodiment if it is provided that the fixing receiving means are arranged in the edge regions of the lower edge not covered by the facing louvre.

In order that the louvres of the ventilation front panel do not project over the opening with the base width and a base unit of height, a further embodiment provides for the free edge of the louvre facing the lower edge to terminate in a plane which is perpendicular to the lower edge of the ventilation front panel, and for the louvre which faces the upper edge to emanate from the upper edge and to terminate in one piece therewith.

According to one embodiment, the ventilation front panel can thus be used to replace a so called 1/2-1911 -structural components carrier plate, if it is provided that the ventilation front panel is fixed on a structural components carrier plate which is provided with a recess, if the recess surrounds the louvre openings of the ventilation front panel, if the structural components carrier plate is proyided with fixing bores which are in accordance with, and intended for, the arrangement of screw receiving means on the rear of the ventilation front panel, if the height of the structural components carrier plate corresponds to the base unit of height, and ifthe structural components carrier plate is extended in width at either end across the ventilation front panel, and is in the form of a fixing flange with fixing bores.

If replacement for a so called 1911-structural components carrier is required, then it is provided that two ventilation front panels which are juxtaposed in width are fixed to a structural components 4 carrier plate. The structural components carrier plate is provided with two recesses, which determine fixing locations for the ventilation front panels. The recesses embrace the louvre openings of the ventilation front panels which are fixed thereon. The structural components carrier plate is provided with fixing bores which are in accordance with, and designed for, the screw receiving means of the juxtaposed ventilation front panels. The structural components carrier plate is of a height which corresponds to the base unit of height, and the structural components carrier plate is extended in width at either end across the juxtaposed ventilation front panels, and is in the form of a fixing flange with fixing bores.

The invention is diagrammatically illustrated by way of example in the accompanying drawings, in which:

Figure 1 shows a front view of a ventilation front panel of a ventilation cover according to the invention; Figure 2 shows a plan view of the ventilation front panel of Figure 1; Figure 3 shows a side view of the ventilation front panel of Figure 1; Figure 4 shows a rear view of the ventilation front panel of Figure 1; Figure 5 shows a section taken on line V4 in Figure 1; Figure 6 shows a section taken on the line V14I in Figure 1; and Figure 7 shows a structural components carrier plate for placement of two juxtaposed ventilation front panels as shown in Figures 1 to 6 in the form of a replacement-structural components carrier for a so called 1911-structural components carrier., Referring to the drawings, a ventilation front panel 10 shown in Figures 1 to 6 has a width B which corresponds to the base width of the 30 opening of a so called W2-191'-module housing. The height H of the ventilation front panel 10 corresponds to a base unit of height HE of a module housing of this kind. The ventilation front panel 10 has three louvres 11 which project to the front and downwardly at an angle of 450, wherein the uppermost louvre 11 emanates in one piece from the 35 upper edge of the ventilation front panel 10, and the free edge of the bottom-most louvre 11 terminates in one piece with the lower edge 15 of the ventilation front panel 10. The ends of the louvres 11 facing the height of the ventilation front panel 10 are chamfered and emanate in one piece into the vertical edges of the ventilation front panel 10. In the two lower corner regions which are not covered by the bottom-most louvre 11, there are two square fixing receiving means 13 which are arranged at a spacing A from each other, this spacing corresponding to a whole multiple of the distribution of bars with threaded holes therein inserted into the transverse carriers. The spacing of the fixing receiving means 13 from the lower edge 15 of the ventilation front panel 10 is selected such that the ventilation front panel 10 can be joined to the transverse carrier in such a way that the lower edge 15 thereof does not project over the lower edge of the transverse carrier. Between the louvres 11, the rear side ie the base plate of the ventilation front panel 10 has rectangular louvre openings 12 therein. These louvre openings 12 are only interrupted by a crosspiece with two blind-hole-like screw receiving means 14, as can be seen in Figures 4 and 6. Therefore, the ventilation front panel 10 can also be fixed additionally in their centre, if they are fixed onto a structural components carrier plate 20 according to Figure 7.

Since the dimensions B and H of the ventilation front panel 10 are such that they are in accordance with the base width and a base unit of height, eg with a so called V2-191'-module housing, a larger receiving opening of a module housing can be covered in a pattern which corresponds to the base unit of height.

If the module housing has a receiving means opening with twice the base width, ie if a so called 19"-module housing is being used, then two ventilation front panels 10 are juxtaposed with their narrow sides abutting against one another, in order to obtain adequate cover over the entire width of the receiving means opening. The height of the cover can be changed by the further juxtaposition of two ventilation front panels 10 which are arranged in series in the pattern of the base unit of height.

The two ventilation front panels 10 can be fixed to a structural components carrier plate 20 at two fixing locations 21, as shown in Figure 7. The fixing locations 21 have an opening 23 which the louvre openings 12 of the ventilation front panels 10 embrace. The fixing bores 22 of the structural components carrier plate 20 are in accordance with, and intended for, the arrangement of screw receiving 6 means 14 on the rear side of the ventilation front panels 10. At either end, the structural components carrier plate 10 makes a transition into fixing flanges 25 with fixing bores 24, so that it can be fixed in a switch cabinet in the form of a cover with the ventilation front panels 10 fixed thereon, like a so called 1911-structural components carrier.

In the width of the receiving means in the switch cabinet is in accordance with a so called 1/2-19 "-structural components carrier, then the structural components carrier plate 20 merely has one fixing location 21 with an opening 23 and the associated fixing bores 22 to which fixing flanges 25 with fixing bores 24, in turn, are attached. The cover designed thus can be fixed in a switch cabinet with appropriate receiving means, like a so called 1/2-19 "-structural components carrier.

The base width B and the base unit height H are not restricted to the 483 mm (19 inch) -technique. Any values for these dimensions are possible.

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Claims

1. A ventilation cover for a module receiving aperture of a housing which is accessible at the front side, the aperture having a base width and a height corresponding to a whole multiple of a base unit of height, wherein transverse carriers can be used to sub-divide the receiving aperture into partial openings, the heights of which are a smaller whole multiple of the base unit of height, the transverse carriers being provided on the front with a T-slot into which a bar having threaded holes therein can be pushed, and wherein the ventilation cover comprises ventilation front panels with louvres and louvre openings interposed therebetween to cover the partial openings, the width thereof corresponding to the base width of the receiving aperture and the height cornesponding to the base unit of height, each ventilation front panel adjacent to the lower edge bearing at least two fixing receiving means which are arranged at a spacing from each other which corresponds to a whole multiple of the distribution of the threaded holes in the bars, and the rear of the ventilation guide plates, outside the louvre openings, being provided with screw receiving means.

2. A ventilation cover according to claim 1, in which the louvres are disposed approximately at an angle of 450 to the rear of the ventilating front panels, and are chamfered at their ends.

3. A ventilation cover according to claim 1 or claim 2, in which the fixing receiving means are quadratic in cross-section and are arranged at a spacing from the lower edge which corresponds to the spacing of the threaded holes of the bars from the lower edge of the transverse carriers.

4. A ventilation cover according to any one of claims 1 to 3, in which the receiving aperture has a width which corresponds to twice the base width and a partial opening which extends across the entire width of the receiving aperture and a base unit of height can be covered by two of the ventilation front panels juxtaposed.

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5. A ventilation cover according to any one of claims 1 to 4, in which the fixing receiving means are arranged in the edge regions of the lower edge not covered by the facing louvres.

6. A ventilation cover according to any one of claims 1 to 5, in which the free edge of the louvre facing the lower edge terminates in a plane which is perpendicular to the lower edge of the ventilation front panel, and the louvre which faces the upper edge emanates from the upper edge and terminates in one piece therewith.

7. A ventilation cover according to any one of claims 1 to 6, in which each ventilation front panel can be fixed on a structural components carrier plate which is provided with a recess, the recess encloses the louvre openings of the ventilation front panel, the structural components carrier plate is provided with fixing bores which are in accordance with, and intended for, the arrangement of screw receiving means on the rear of the ventilation front panel, the height of the structural components carrier plate corresponds to the base unit of height, and the structural components carrier plate is extended in width at either end across the ventilation front panel, and is in the form of a fixing flange with fixing bores.

8. A ventilation cover according to any one of claims 1 to 6, in which two of the ventilation- front panels juxtaposed in width can be fixed to a structural components carrier plate, the structural components carrier plate is provided with two recesses which determine fixing locations for the ventilation front panels, the recesses embrace the louvre openings of the ventilation front panels which are fixed thereon, the structural components carrier plate is provided with fixing bores which are in accordance with, and designed for, the screw receiving means of the juxtaposed ventilation front panels, the structural components carrier plate is of a height which corresponds to the base unit of height, and the structural components carrier plate is extended in width at either end across the juxtaposed ventilation front panels and is in the form of a fixing flange with fixing bores.

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9. A ventilation cover substantially as hereinbefore described and illustrated with reference to the accompanying drawings.

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