EP0786568A1 - Ventilating element for roofs - Google Patents

Abstract

The sealing component (7) is formed as a deformable, in particular elastic bellows (10) provided with air outlet apertures (8). These apertures are formed as incisions or free cuts. The ventilation component (1) is formed as a flexible bellows ventilator sealing strip unwound from a roll. The incisions run crossways, especially at right-angles to the longitudinal extent. The ventilator cap (3) is formed in one piece with at least one bellows. The bellows is fitted on at least one lateral end area (4) of the ventilator cap. The bellows and ventilator cap are made of plastics or metal.

Description

The invention relates to a ventilation element for roofs, with a fan cap to be arranged in the ridge, hip or ridge area and with at least one elastically flexible sealing element which adjoins the fan cap at its edge area.

In the introduction it is said that the ventilation element according to the invention includes a fan cap to be arranged in the ridge, hip or ridge area. The word "fan cap" could lead to the assumption that it is a dimensionally stable, ie dimensionally stable body. However, this does not have to be the case. In the context of the invention, “fan cap” is also understood to mean such an element which can be as resilient as is postulated for the sealing member.

In the introduction it is also said that the ventilation element - in addition to a fan cap to be arranged in the ridge, hip or ridge area - includes at least one sealing member. It should be pointed out here that, as a rule, a ventilation element of the type in question - symmetrical to the fan cap - has two sealing elements. As a rule, it is a ventilation element for roofs, with a fan cap to be arranged in the ridge, hip or ridge area and with two resilient sealing members adjoining the fan cap at its edge areas. Nevertheless, the phrase "with at least one sealing member" is always used in the following.

It is known to use sealing elements made of foam in ventilation elements of the type in question. The disadvantage is that, with different spacing differences and / or sharp-edged transitions, the foam is not able due to its structure to achieve a sufficient level of tightness, for example against flying snow and driving rain. Another disadvantage is that the foam is not resistant to aging, so it becomes brittle and crumbly over time, so that the functional stability is not guaranteed. Furthermore, foam requires a high compression pressure, which makes laying difficult and often leads to unsatisfactory work and sealing results. Finally, accessible areas are exposed to bird feeding.

It is also known to use a brush strip as a sealing element for ventilation elements, the brush strip having a large number of elastic brush threads arranged in at least largely flow-tight packing. It is disadvantageous that the fine thread ends can therefore bend the individual thread tips, for example if they encounter obstacles such as rough spots, edges etc., whereby the tightness is questioned. Finally, in critical areas, for example in corner areas, it is not ensured that the brush threads extend into these areas. Furthermore, the brush threads tend to stand up or lift off when the roofing material heats up strongly and no longer return to the starting position when it cools down, as a result of which the areas released in this way can penetrate, particularly in the case of wind pressure, flying snow and driving rain. There is also the danger that the very fine brush threads become brittle and break off due to environmental influences, strong sunshine (UV radiation), which in turn greatly reduces the tightness. Another disadvantage is that when the wind pressure is high, the brush threads are spread apart in a wedge shape, and this creates large entry openings for flying snow and driving rain. It also happens that the fine brush threads stick together due to environmental influences and clump together like rake tines, creating free spaces through which flying snow and driving rain can penetrate. In addition, the loose brush threads lose their most important feature, namely the elasticity, which greatly reduces the seal.

The object of the invention is therefore to provide a ventilation element of the type mentioned, in which an optimal seal is guaranteed and which adapts evenly and homogeneously to any roofing material.

The ventilation element according to the invention, in which the previously derived and shown object is achieved, is now initially and essentially characterized in that the sealing member with a closed body in its region adjoining the edge region of the fan cap and in its region remote from the edge region of the fan cap is preferably approximately pear-shaped cross section. Characterized in that the sealing member is designed as an elastically deformable hollow body, it is able to use any roofing material, for example brick-shaped roofing material, wavy roofing material or otherwise adapt profile-shaped roofing material. The sealing member designed in accordance with the invention can very well fit both in depressions and on elevations of the roofing material. This largely prevents the entry of flying snow and driving rain.

In the ventilation element according to the invention, the hollow body representing the sealing member is preferably formed by a sheet-like starting material that has been folded in or folded over. The two sides of the sheet-like starting material are placed one on top of the other, which then gives the hollow body, which, as already stated, preferably has an approximately pear-shaped cross section. The properties of the sheet-like starting material, in particular the elasticity, are advantageously utilized by the turning or turning over of the sheet-like starting material to the hollow body forming the sealing member, namely in that the hollow body thus formed has a high degree of adaptability, as a result of which a uniform seal between the fan cap and the roofing material is guaranteed.

For ventilation elements of the type in question, it is generally the case that the ventilation takes place via air passage openings provided in the fan cap; these air passage openings can have any cross section, in particular a round or oval cross section. The effective sealing member between the fan cap and the roofing material has essentially two functions. On the one hand, as already stated, the sealing member is intended to prevent the entry of flying snow and driving rain. On the other hand, the sealing member is also intended to prevent outside air from entering the interior, ie below the fan cap, which could impair the ventilation function of the ventilation element as a whole, that is to say, above all, the ventilation function of the fan cap.

Taking into account what has been stated above regarding the basic function of ventilation elements according to the invention, in the ventilation element according to the invention the hollow body can nevertheless have incisions, cut-outs or recesses which lead above all to increasing the elasticity of the sealing member. Surprisingly, these incisions, free cuts or recesses do not have a negative effect on the basic function explained above of the ventilation elements in question. Rather, these incisions, free cuts or recesses can even bring an advantage in terms of ventilation in addition to the function of increasing the elasticity of the sealing member. Surprisingly, it has been shown that the design of the sealing member according to the invention, described in detail above, leads to different flow resistances being present. While the flow resistance from outside to inside is relatively large, as required, the interference resistance from inside to outside is considerably lower. As a result, air is undesirably prevented from entering from the outside in, but is allowed to flow from the inside to the outside through the sealing member.

If the hollow body has an incision in the ventilation element according to the invention, these incisions expediently run transversely to the longitudinal extent of the sealing member, in particular at an angle of less than 90 °. In particular, the incisions can run at such an angle to the longitudinal extent of the sealing member that in the area adjoining the edge region of the fan cap, the strip-shaped parts formed by the incisions overlap or intersect - partially or completely.

The ventilation element according to the invention can consist of a ventilation cap and a separate sealing member or two separate sealing members, that is to say can be made in several pieces. Then it is advisable to provide the sealing member with a connecting strip in its area adjoining the edge area of the fan cap. In such an embodiment, the sealing member can then be inserted with a terminal strip into a groove provided in the edge area of the fan cap.

A particularly advantageous embodiment of the ventilation element according to the invention is now characterized in that the fan cap and the sealing member - or the fan cap and the sealing members - are integrally formed. This has both manufacturing and assembly advantages.

Finally, an embodiment of the ventilation element according to the invention is particularly advantageous in that the ventilation element is flexible, in particular to a roll of sealing tape can be wound up or unwound from a roll. This configuration makes it possible to first wind up the ventilation element or ventilation band, which is produced in relatively large lengths, so that space-saving storage or transport is possible. On the spot, namely on the roof to be equipped with such a ventilation element, the ventilation element or the sealing tape is then simply rolled out, positioned and fastened over the ridge batten. The time and thus the cost of installing the ventilation element designed in this way is consequently extremely low.

The subject of the invention is not only the ventilation element described in detail above, but rather the subject of the invention is also a method for producing such a ventilation element. This method is characterized in that the fan cap and the sheet-like starting material for the sealing member are extruded, that the sheet-like starting material for the sealing member is then connected on one side in the edge region of the fan cap to the fan cap and that finally the sheet-like starting material for the sealing member to form the hollow body folded over and connected with its free side in the edge region of the fan cap to the fan cap or in the region of the sheet-like starting material for the sealing member adjoining the edge region of the fan cap to this starting material.

If the ventilation element to be produced is one in which the fan cap and the sealing member or the fan cap and the sealing members are formed in one piece, then the previously explained method is implemented in such a way that the fan cap and the starting material for the sealing member are extruded in one piece .

The connection of the starting material for the sealing member to the fan cap, which is required in the previously described method for producing a ventilation element according to the invention, can be carried out in different ways. In particular, it is recommended to weld or glue here.

Fig. 1

einen Querschnitt durch den Firstbereich des Daches eines Gebäudes, wobei im Firstbereich ein erstes Ausführungsbeispiel eines erfindungsgemäßen Lüftungselementes vorgesehen ist,

Fig. 2

eine der Fig. 1 entsprechende Darstellung mit einem zweiten Ausführungsbeispiel eines erfindungsgemäßen Lüftungselements,

Fig. 3

eine perspektivische Ansicht des Firstbereiches nach Fig. 1,

Fig. 4

eine Seitenansicht und eine Draufsicht des gemäß Fig. 1 verwendeten erfindungsgemäßen Lüftungselements,

Fig. 5

eine der Fig. 4 entsprechende Darstellung eines anderen Ausführungsbeispiels eines erfindungsgemäßen Lüftungselements,

Fig. 6

eine Detaildarstellung zur weiteren Erläuterung der Erfindung,

Fig. 7

eine Seitenansicht, eine Draufsicht und eine perspektivische Darstellung eines weiterens Ausführungsbeispiels eines Abdichtorgans eines erfindungsgemäßen Lüftungselements,

Fig. 8

in einer perspektivischen Darstellung ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Lüftungselements,

Fig. 9

eine der Fig. 7 entsprechende Darstellung eines weiteren Ausführungsbeispiels eines Abdichtorgans eines erfindungsgemäßen Lüftungselements,

Fig. 10

eine den Fig. 7 und 9 entsprechende Darstellung eines weiteren Ausführungsbeispiels eines Abdichtorgans eines erfindungsgemäßen Lüftungselements und

Fig. 11

eine den Fig. 4 und 5 entsprechende Darstellung eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Lüftungselements.

In particular, there are now a multitude of possibilities for designing and developing the ventilation element according to the invention. Reference is made to this on the one hand to the claims subordinate to claim 1, on the other hand to the description of preferred exemplary embodiments in conjunction with the drawing. In the drawing shows

Fig. 1

3 shows a cross section through the ridge area of the roof of a building, a first exemplary embodiment of a ventilation element according to the invention being provided in the ridge area,

Fig. 2

1 corresponding representation with a second embodiment of a ventilation element according to the invention,

Fig. 3

2 shows a perspective view of the ridge area according to FIG. 1,

Fig. 4

2 shows a side view and a top view of the ventilation element according to the invention used according to FIG. 1,

Fig. 5

4 shows a representation of another exemplary embodiment of a ventilation element according to the invention,

Fig. 6

a detailed representation to further explain the invention,

Fig. 7

2 shows a side view, a top view and a perspective illustration of a further exemplary embodiment of a sealing member of a ventilation element according to the invention,

Fig. 8

a perspective view of a preferred embodiment of a ventilation element according to the invention,

Fig. 9

7 shows a representation of a further exemplary embodiment of a sealing member of a ventilation element according to the invention,

Fig. 10

a representation corresponding to FIGS. 7 and 9 of a further embodiment of a sealing member of a ventilation element according to the invention and

Fig. 11

4 and 5 corresponding representation of a further embodiment of a ventilation element according to the invention.

1 shows a ventilation element 1 which can be used in the ridge, hip or ridge area of a roof. The ventilation element 1 has a band-shaped fan cap 3 with a first edge area 4, a middle area 5 and a wide edge area 6 and with sealing elements 7 connected to the edge areas 4, 6. A lath holder 11 is fastened to counter laths 9 and has a U-shaped profile 13 into which a ridge lath 15 is inserted. A battens is also attached to the counter battens 9, of which only the battens 17 are shown here. Bricks 19 are hung on the slats 17.

The fan cap 3 rests with its central region 5 on the ridge batten 15 and is held on the ridge batten 15 by means of spacers 21 which are spaced apart and are shown in FIG. 6. Each spacer 21 is fastened to the ridge batten 15 by means of its fastening region 23 with nail-like pins 25. Ridge clamps 29 are fastened to the ridge batten 15 with screws 27 and serve to fix ridge tiles 31 in place. The ridge tiles 31 are supported by contact edges 22 of the spacers 21. The spacers 21 form the fan cap 3 by means of edges 24, that is to say the fan cap 3 is pressed down by the spacers 21, as a result of which it is reversibly or elastically deformed.

The sealing members 7 are attached to the two edge regions 4, 6 of the fan cap 3. This can be done for example by means of a clip connection, an adhesive connection or a screw connection. Alternatively, a one-piece design is also conceivable. “One piece” is to be understood to mean that the ventilation element 1 is formed from one material. The sealing members 7 serve to close the irregularly large gaps between the top 20 of the brick 19 and the bottom 32 of the ridge tile 31 in such a way that on the one hand there is air circulation is possible in the ridge area and on the other hand prevents the penetration of flying snow and driving rain.

According to the invention, each sealing member 7 is designed as a closed hollow body 10 in its area adjoining the edge area 4, 6 of the fan cap 3 and in its area remote from the edge area 4, 6 of the fan cap 3. This means that the hollow body 10 extends from the area of the sealing member 7, which adjoins the edge area 4, 6 of the fan cap 3, to its end remote from the edge area 4, 6 of the fan cap 3.

For the essence of the invention, however, it is not necessary for the hollow body 10 to extend as far on both sides as has been explained again above. It is readily conceivable that the hollow body 10 does not begin immediately where the sealing member 7 connects to the edge area 4, 6 of the fan cap 3. It is also conceivable that the hollow body 10 already ends before the end of the sealing member 7 remote from the edge region 4, 6 of the fan cap 3.

The sealing members 7 have incisions 41 which are not visible in FIG. 1; in this regard, reference is made to FIGS. 4, 5, 7 and 9. The sealing members 7 are shown unfolded. They have cuts 41 arranged at a distance from one another and transversely to the longitudinal extent of the sealing member 7. These are introduced into the sealing member 7 such that the two ends 42 and 42 'of the incisions 41 are spaced apart from the area in which the two sides of the starting material for the sealing member 7 lie one on top of the other in the folded state. The starting material for the sealing member 7 is hammered in after the incisions 41 have been made and is held together at the connection point 43 in the manner already mentioned. The incisions 41 are made in a punching or cutting process in the ventilation element 1 lying flat before the handling process. If material is removed at the cutting point during this machining process, free cuts are formed. In the case of cuts, no material is removed.

1, the function of the sealing member 7 is explained in more detail. An air flow 35 flows in the roof structure from the eaves to the ridge and is divided into two air flows 37 and 36. The air flow 37 passes through the air passage openings 8 of the band-shaped fan cap 3 and passes into the intermediate space 47, which is formed between the ventilation element 1 and the ridge tiles 31. From there, the air flow 37 reaches the outside through a gap which is formed between the underside 32 of the ridge tile 31 and the top 49 of the sealing member 7. The air flow 36 passes through the incisions 41 of the hollow body 10, that is to say the air flows through the incisions 41 into the hollow body 10 and from there through the incisions 41 to the outside. It is also conceivable that the air flow 35 - in special weather conditions - escapes exclusively through the vent openings 8 and the gap between the underside of the ridge tile 31 and the top of the sealing member 7.

FIG. 3 shows a perspective view of the ridge area of the roof according to FIG. 1. In this exemplary embodiment, the bricks 19 have a wavy surface, against which the sealing member 7 lies in such a way that the ridge area is sealed against flying snow and driving rain. In the recess between two shafts of the brick 19, the parts of the sealing member 7 produced by an incision or free cut lie close to one another and to the surface of the brick 19, while they are spaced apart on the shafts of the brick 17, that is to say the The space between two parts of the sealing member 7 is enlarged so that the air flow 36 illustrated in FIG. 1 can flow through the hollow body 10 without greater resistance. In another exemplary embodiment, the bricks 19 can have a different surface shape, against which the hollow body 10 lies in a suitable manner. Regardless of the embodiment of the brick 19, the ventilation element 1 according to the invention ensures the desired sealing against flying snow and driving rain and air circulation in the ridge area of the roof.

Fig. 2 also shows a cross section of a roof in the ridge area. Another exemplary embodiment of a ventilation element 1 is shown. The same parts are provided with the same reference numerals, so that reference is made to the description of FIG. 1. The fan cap 3 'is, however, rigid, so that it also takes over the function of the spacers 21 according to FIG. 1 and thereby replaces them. The sealing member 7 is fastened to the edge regions 4, 6 of the fan cap 3 'in the manner already mentioned.

4 shows the side view and the top view of the ventilation element 1. The ventilation element 1 consists of three parts, namely the fan cap 3 'and the two sealing members 7. In the central region 5 of the fan cap 3', air passage openings 8 - in the form of elongated holes - are provided. The three parts are made of sheet-like material, that is, a mat-like material. This makes it very easy to make the incisions 41 and the air passage openings 8.

FIG. 5 shows a side view and a top view of a further embodiment of a ventilation element 1 which is formed in one piece, that is to say the fan cap 3 and the sealing members 7 are made from a sheet-like material. The one-piece ventilation element 1 is preferably produced by extrusion.

Fig. 7 shows a sealing member 7, in which the folded ends 42 and 42 'are clipped together like a strip. A separate clamping rail can also be used for the connection. To fasten the sealing member 7, this is inserted into a receptacle of the fan cap 3 with a connecting strip 50.

FIG. 8 shows a ventilation element 1 according to FIG. 1 in a rolled-up state. The compact shape of the ventilation element 1 makes it possible to transport it without any special effort. The transport of the ventilation element 1 is thus considerably simplified.

In the case of a fan cap 3 which is formed in one piece, the sealing member 7 can have a smaller material thickness than the fan cap 3. This strengthens the fan cap 3 in the area in which the nail-like pins of the spacer 21 penetrate the fan cap 3, and the sealing member 7 maintains its elasticity.

Another embodiment of the ventilation element according to the invention is characterized in that the ventilation element 1 is made of different materials. For example, the fan cap 3 can be made of metal and the sealing member 7 can be made of plastic.

Fig. 10 shows a sealing member 7, in which the incisions 41 are made zigzag.

Finally, FIG. 11 shows an exemplary embodiment of a ventilation element according to the invention which has been extruded as such, in which the hollow body 10 is therefore already present after the extrusion, so that it is not necessary to wrap or turn over sheet-like starting material.

In conclusion, it should also be pointed out that the ventilation element 1 according to the invention has the great advantage that the sealing members 7 do not have to be glued to the roofing material, so that the ventilation element 1 can be laid without any problems in any weather.

Claims (13)

Ventilation element for roofs, with a fan cap to be arranged in the ridge, hip or ridge area and with at least one elastically flexible sealing element adjoining the fan cap at its edge area, characterized in that the sealing element (7) as in its edge area (4, 6) the area surrounding the fan cap (3) and in its hollow body (10) which is closed to the edge area (4, 6) of the fan cap (3) and is preferably of a pear-shaped cross section. Ventilation element according to claim 1, characterized in that the hollow body (10) is formed by a folded-in or folded-over sheet-like starting material. Ventilation element according to claim 1 or 2, characterized in that the sealing member (7) is provided with a connecting strip (50) at its area adjoining the edge area (4, 6) of the fan cap (3). Ventilation element according to one of claims 1 to 3, characterized in that the hollow body (10) has incisions (41), free cuts or recesses to increase the elasticity of the sealing member (7). Ventilation element according to claim 4, characterized in that the incisions (41) run transversely to the longitudinal extent of the sealing member (7), in particular at an angle of less than 90 °. Ventilation element according to claim 5, characterized in that the incisions (41) run at such an angle to the longitudinal extent of the sealing member (7) that in the area adjoining the edge region (4, 6) of the fan cap (3) the area through the incisions (41 ) formed strip-shaped parts overlap or cross - partially or completely. Ventilation element according to one of claims 1 to 6, characterized in that the fan cap (3) and the sealing member (7) are integrally formed. Ventilation element according to one of claims 1 to 7, characterized in that the ventilation element (1) is designed as a flexible sealing tape, in particular a tape that can be wound up or unwound from a roll. Ventilation element according to one of claims 1 to 8, characterized in that the fan cap (3) and / or the sealing member (7) consists or consist of plastic or metal. A method for producing a ventilation element according to one of claims 1 to 6, 8 and 9, characterized in that the fan cap and the sheet-like starting material for the sealing member are extruded, that the sheet-like starting material for the sealing member is then connected to the fan cap on one side in the edge region of the fan cap is and that finally the sheet-like starting material for the sealing member is turned over to form the hollow body and is connected with its free side in the edge region of the fan cap to the fan cap or in the area of the sheet-like starting material for the sealing member adjoining the edge region of the fan cap to this starting material. Method according to claims 7 and 10, characterized in that the fan cap and the starting material for the sealing member are extruded in one piece. A method according to claim 10 or 11, characterized in that the connection takes place in the form of welding or gluing. Method for producing a ventilation element according to one of claims 1, 4, 5 and 6 and according to one of claims 7 to 9, characterized in that the fan cap and the sealing member are extruded in one operation.

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