EP0392064A1 - Roof-covering arrangement - Google Patents

Abstract

The device provides for an aesthetic and inexpensive opening in a roof, e.g. for roof ventilation or roof surface penetration, if an insert (8) with a catchment area to trap and lead away deposits and dirt entering through the aperture (12) is fitted beneath the roof component and substantially parallel to the roof component plane, if the insert (8) has at least one penetration aperture (30) and if the penetration aperture (30) is offset sideways in relation to the catchment area (22) and/or upwards from said catchment area (22).

Description

The invention relates to an arrangement for roofing with a flat roof element having at least one opening, for example for roof ventilation or for a pipe leadthrough, according to the preamble of the independent claim.

A generic arrangement, which is designed as a vent stone, is known from DE-GM 87 09 514. The flat roof element is designed as a central bead stone which has a through opening approximately in the middle covered by a dormer with a semicircular profile. A ventilation grille with vertical ribs and a closed front surface on the eaves side is provided at the dormer opening in the extension of the dormer jacket. The roof tile, dormer and ventilation grille must be manufactured as individual parts and then glued together in one piece. The dome-like cover and the glued ventilation grille lead to a striking visual interruption within a roof area. In addition, it is readily apparent that different materials, in particular plastic, are used for the ventilation grille.

Roof tiles for pipe penetrations are also known. These are used for the roof penetration of antennas, ventilation pipes and struts for gratings and climbing steps. In the passage area, a lead sleeve is usually placed on the pipe, which covers the edge of the opening and prevents rain from penetrating into the sub-roof prevents. An individual adjustment of the sleeve to the roof tile opening is usually required. In addition, the sealing effect of the sleeve can gradually decrease when the pipe in question is loaded, for example in wind or snow, because the sleeve is unable to compensate for the relative movement between the pipe and the stationary roof element.

The invention has for its object to provide an arrangement for roofing of the generic type, which is easy to install and still ensures a reliable seal and which also fits harmoniously into a roof landscape.

This object is achieved in that under the roof element and essentially parallel to the top surface of the roof element there is an insert with a collecting area for collecting and draining off precipitation and impurities entering through the opening, that the insert has at least one passage opening, and that the passage opening is offset laterally and / or upwards from the collecting area relative to the collecting area. With such a design, roof elements, in particular ventilation tiles, with a larger opening can be used, since they no longer have to be covered at the top against the penetration of precipitation and contamination. To a volume or To ventilate the sub-roof specified in terms of area, fewer ventilation tiles are required than previously. In addition, ventilation tiles within the umbrella organization can hardly be distinguished from the other tiles, since they essentially have no externally recognizable shapes. In particular, an externally visible variety of materials is avoided here because only the outer roof element is visible and the use does not appear to the outside.

Roof elements with an opening for a pipe penetration do not need a technically complex and individually adjustable cuff. Precipitation can get under the roof element according to the invention by breaking through it, where it impinges on the collecting area of the insert and is derived from there. The water is either diverted to the roof section further down or it can be fed to a central drainage or water collection system via sewer and hose systems.

Since the pipe bushing in the critical area is no longer directly connected to the roof element, movements of the pipe during wind and snow loads can be compensated for by the insert, which must be made less rigid than the outer roof element. In particular, if it is made of plastic, it can compensate for the movements that occur.

In an arrangement designed for under-roof or roof space ventilation, it is advantageous if a transverse rib is arranged on the insert, which is led to the eaves-side edge of the opening in the outer roof element beyond the opening, and the free end of which is designed as a tear-off edge. This edge causes an air flow passing over the roof surface to be torn off. The resulting negative pressure leads to suction of air from the lower roof.

It is expedient to arrange this transverse rib with the aid of support ribs oriented in the outflow direction at a predetermined distance from the collecting area of the insert, so that there is a passage opening in the direction of the eaves for the collected precipitation between this rib and the collecting area. If the supporting ribs are arranged on the sides of the opening, they, like the transverse rib with the tear-off edge, prevent inclined precipitation in the catchment area, as it could occur especially in strong winds. Precipitation is thus directed to the collecting area and uncontrolled penetration into the roof space is prevented.

In order to further improve the stability and bending stiffness of the insert, support ribs are arranged in a grid-like manner at predetermined intervals over the entire opening of the outer roof element and extend into the area of the opening. In this way, a protective grid against the penetration of foliage, small animals or the like is formed. The engagement of the support ribs in the opening in the outer roof element also fixes the insert in its position relative to the roof element. This has the advantage that the insert does not have to be fastened separately on the roof battens or the like, so that the arrangement can be placed on the roofing unproblematically and as quickly as a normal roof tile.

A particularly advantageous development of the invention in connection with an under-roof ventilation is that the opening in the flow direction is arranged on the lower side and essentially over the entire width of the outer roof element, that the passage opening of the insert is arranged offset upwards with respect to the opening and that the cross section of the passage opening, the opening and the space between the roof element and the insert is substantially the same. This measure allows maximum air passage with the least possible disturbance of the air flow. To ensure reliable drainage of water, it is advisable to provide the insert along its two side edges with an upward-facing collar. The collar serves the same dimensions for stiffening the edge of the insert.

It may also be appropriate that the insert is provided with a transverse offset above the passage opening. This has the advantage that the distance and thus the passage cross section between the insert and the outer roof element is increased. In addition, the collecting area can be shaped and braced in the manner of a trough.

It is also advantageous to provide the end of the attachment on the eaves side, which rests on the next roof element within a roof structure, with a drip edge. In addition, it can be expedient to provide at least the lower edge, but preferably also the two adjoining side edges of the insert passage opening, with an upwardly facing collar. In this way it is ensured that, for example in the case of a low roof pitch, precipitation that may back up can penetrate into the roof space through the passage opening.

To fix the position of the roof element, it can also be advantageous for it to be provided on the underside at its ridge side end with a web for hanging in a roof batten.

If the arrangement is to serve as a lead-through for a pipe, a good seal against ingress of precipitation is achieved in that the passage opening of the insert is formed by a nozzle and that the nozzle is so long that the passage opening is sufficiently far upwards relative to the collecting surface is offset in order to prevent the penetration of precipitation from the collecting area into the nozzle. In a preferred embodiment, a vent pipe with an edge overlapping the neck can be placed on the neck. This has the advantage that an additional cuff is not necessary.

As an alternative to this, it is particularly advantageous that there is an angled tube piece on which an edge is formed for plugging onto the connecting piece. By appropriate alignment of the elbow, the leg placed on the connecting piece can be aligned substantially vertically in order to attach a fan tube thereon, so that it runs exactly vertically. The elbow can also serve as an adapter with regard to the fan tube cross section.

Here, too, a precipitation-proof connection between the nozzle and the elbow can be produced without using a separate sleeve.

The insert is preferably made of plastic or metal.

The insert can have a profiled cross section to improve its stability. Above all, this helps to improve the rigidity. A higher rigidity can also be achieved by providing reinforcing ribs on the insert. The reinforcing ribs can run parallel to the flow direction and at the same time serve to guide runoff precipitation.

Advantageous developments of the invention are the subject of the dependent claims.

• Fig. 1 zeigt einen Längsschnitt durch eine Anordnung zur Ent­lüftung eines Dachraums;
• Fig. 2 zeigt eine perspektivische Ansicht des Einsatzes der Anordnung gemäß Fig. 1;
• Fig. 3 zeigt einen Längsschnitt durch eine erste Anordnung für eine Rohrdurchführung; und
• Fig. 4 zeigt einen Längsschnitt durch eine zweite Anordnung für eine Rohrdurchführung.

The invention is further described below using three exemplary embodiments:

• Fig. 1 shows a longitudinal section through an arrangement for venting a roof space;
• FIG. 2 shows a perspective view of the insert of the arrangement according to FIG. 1;
• Fig. 3 shows a longitudinal section through a first arrangement for a pipe bushing; and
• Fig. 4 shows a longitudinal section through a second arrangement for a pipe bushing.

The arrangement illustrated in FIG. 1, which can also be referred to as a surface fan 9, comprises an outer roof element designed as a fan tile 10 for mounting on an inclined roof. The fan brick 10 has at its lower, eaves-side end within the brick surface an opening 12 which extends as far as possible over the entire width of the fan brick 10 perpendicular to the plane of the drawing. The opening 12 has a rectangular cross section. At its ridge-side end, the fan tile 10 is suspended with a lug 14 on a roof batten 16 in the roof construction, while the eave-side end 18 rests on the ridge-side end of the next roof tile 20. A plastic insert 8 is arranged under the fan tile 10, which forms a chicane, on the one hand to collect and discharge precipitation penetrating through the opening 12 and on the other hand to ensure an air flow from the inside to the outside for venting the lower roof 7.

The insert 8 rests on the ridge side on the roof batten 16, being pressed from above by the weight of the fan tile 10. Its eaves-side end 25 lies on the adjacent roof tile 20, wherein it engages with a web-shaped downward drip edge 6 in a groove on the roof tile 20.

The insert 8 has a closed collecting area 22 below the opening 12 of the fan tile 10, which collects penetrating precipitation and discharges it down onto the roof tile 20. In the catchment area 22 there are support ribs 27 which are oriented in the direction of flow and project vertically and extend into the opening 12. The support ribs 27 carry a cross on their eaves-side end face rib 26, which extends beyond the edge of the opening 12. The edge projecting over the surface of the fan brick 10 forms a sharp tear-off edge 28. An air flow passing over the fan brick 10 breaks off at the edge 28 and thereby creates a negative pressure in the opening 12. The transverse rib 26 ends at a predetermined distance above the collecting area 22 , so that there is a sufficient outlet 29 in the direction of discharge. In the example shown, the transverse rib 26 is provided with a rounded cross section for aerodynamic reasons.
In the flow direction above the collecting area 22, the insert 8 is provided with a passage opening 30, which creates a connection to the lower roof 7. A collar 31 running around the edge of the passage opening 30 prevents precipitation entering through the opening 12 from entering the sub-roof 7 through the passage opening 30, particularly in the case of a low roof pitch. 5 denotes an aerodynamic rounding at the edge of the passage opening 30.

The insert 8 extends essentially in one plane and parallel to the top surface of the fan brick 10 at a predetermined distance from its underside. An air passage cross-section 32 is determined via the distance, which corresponds to the cross-sectional area of both the passage opening 30 and the opening 12.

As FIG. 2 further illustrates, the insert 8 is provided with upstands 33 along its two long sides, which prevent penetrating precipitation from reaching the lower roof beyond the long sides in the joint area of the tiles in question. The perspective view further clarifies that the support ribs 27 form a protective grid which prevents the penetration of leaves or the like into the opening 22. In addition, it fixes the insert 8 in the correct position below the fan brick 10 by means of a positive fit in the opening 12.

In the second example according to FIG. 3, the arrangement comprises a breakthrough tile 40, via which a pipe is led out of the sub-roof 7 to the outside. It is provided with a round opening 42 which lies on the top of a step-like formation 41. The opening 42 thus runs essentially horizontally, taking into account a predetermined roof pitch, in order to allow the pipe in question to pass as vertically as possible. The insert 46 has a nozzle 48 below the opening 42, which in the example shown here extends beyond the surface of the perforated brick 40. In this exemplary embodiment, the edge of the socket 48 forms the passage opening 43 of the insert 46, which in turn lies above the catchment area 45 of the insert 46. Precipitation that passes past the nozzle 48 through the opening 42 is collected by the collecting area 45 and drained down onto the next brick 47 of the roof formation.

The insert 46 is provided with a longitudinal offset 49 in the ridge direction above the socket 48. At the ridge-side end of the insert 46 there is also a web 51 pointing downward, which engages behind a roof batten 53, so that the insert 46 is suspended from this roof batten 53.

An angled tube piece 50 with two legs 54, 56 is placed on the socket 48, the outer diameter of which corresponds to the inner diameter of the socket 48. One leg 54 is inserted into the nozzle 58, while the other leg 56 protrudes freely upwards. The free leg 56 is oriented vertically by corresponding rotation of the leg 54 about its longitudinal axis. The free leg 56 can be adapted to another roof pitch by a 180 ° rotation relative to the position shown. The angle of inclination between the two legs 54, 56 is therefore chosen with regard to the common roof pitches so that a vertical alignment is generally possible. In the example shown, a vent pipe 44 is placed on the free leg 56, such as it is used for room ventilation, roof ventilation or similar. It can be seen that the ventilation pipe 44 can be placed directly on the connection piece 48 if, due to the roof pitch, a vertical alignment of the ventilation pipe 44 is possible. For this purpose, the tube 44 is provided with a sleeve 61.
One leg 54 is provided with an outside, downwardly facing cylindrical collar 58 which is positively attached to the nozzle edge. The collar 58 represents a precipitation-proof, sliding-resistant connection, by means of which the angled tube piece 50 is supported on the socket 48. The cross section of the angled tube piece 50 is reinforced in the connection to the collar 58 up to the foot region of the free leg 56, so that a shoulder 60 is formed in the foot region of the leg 56, on which the end face of the ventilation tube 44 is seated.

FIG. 4 illustrates a further variant of an insert 66. The breakthrough brick 40 corresponds to that according to FIG. 3, so that a detailed description is omitted here. The nozzle 68 is tapered on the eaves side similar to the brick-shaped formation 41 up to the support area. In this way, the base of the nozzle 68 is expanded so that it can accommodate a metal support 62. The metal support 62 is screwed onto a roof rail directly in the base area of the connector 68. The support 62 comprises a central tube receptacle 70 projecting into the connection piece 48 and vertical ribs 72. In addition, it is suspended from the roof batten 76 by means of a cranked metal band 74.

In the pipe receptacle 70 there is a pipe 76 which carries a snow guard grille 78 as an example in FIG. 4. Alternatively, it can also carry an antenna or a tread, for example.

The nozzle opening is abge with a plastic sleeve 84 covers, which is placed over the nozzle 68 with a wide edge 80. At the end on the ridge side, the insert 66 is provided with a recess 82 through which the metal strip 74 comes into engagement with the roof molding 64. The insert 66 is suspended on the roof rail 64 on both sides of the metal strip 74.

Claims (10)

1. Arrangement for roofing with a flat roof element having at least one opening, for example for roof ventilation or for a pipe leadthrough,
characterized by
that an insert (8, 46, 66) with a collecting area (22, 45) is arranged under the roof element and essentially parallel to the top surface of the roof element, for collecting and draining off precipitation and impurities entering through the opening (12, 42),
that the insert (8,46,66) has at least one passage opening (30,43) and
that the passage opening (30, 43) is offset laterally and / or upwards relative to the collecting area (22, 45) from the collecting area (22, 45). 2. Arrangement according to claim 1,
characterized by
that on the insert (22) a transverse rib (26) is arranged, which on the eaves-side edge of the opening (12) of the outer roof element extends beyond the opening (12), and the free end of which is designed as a tear-off edge (28). 3. Arrangement according to claim 2,
characterized by
that the transverse rib (26) is arranged at a predetermined distance from the collecting area (22) of the insert (8) with the aid of support ribs (27) oriented in the outflow direction is net, so that between the transverse rib (26) and the collecting area (8) a spout pointing in the direction of the eaves (29) is present. 4. Arrangement according to claim 3,
characterized by
that support ribs (27) are arranged in a grid-like manner at predetermined intervals over the entire opening (12) of the outer roof element and are guided into the area of the opening (12). 5. Arrangement according to one of the preceding claims,
characterized by
that the opening (12) is arranged in the flow direction on the lower side and essentially over the entire width of the outer roof element,
that the passage opening (30) of the insert (8) with respect to the opening (12) is arranged offset upward in the direction of flow, and
that the cross section of the passage opening (30), the opening (12) and an intermediate space between the roof element and the insert (8) is substantially the same. 6. Arrangement according to claim 1,
characterized by
that the passage opening of the insert (46,66) is formed by a connection piece (48,68), and that the connection piece (48,68) is so long that the passage opening (43) is sufficiently far upwards in relation to the collecting area (45) is offset in order to prevent the penetration of precipitation from the collecting area (45) into the connection piece (48, 68). 7. Arrangement according to claim 6,
characterized by
that an angled tube piece (50) is provided, on which a collar (58) for fitting onto the connecting piece (48) is formed. 8. Arrangement according to one of the preceding claims,
characterized by
that the insert (8, 46, 66) is provided along its two side edges with an upward upturn (33). 9. Arrangement according to one of the preceding claims,
characterized by
that the insert (8, 46, 66) has a drip edge (6) at its eaves-side end. 10. Arrangement according to claim 6,
characterized by
that a sleeve (84) is slipped onto the connection piece (68) for narrowing the cross section of the passage opening (43).

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