AT524807B1 - Balcony or terrace element with a drainage system, drainage system for such a balcony or terrace element, and manufacturing process - Google Patents

Abstract

The invention relates to a balcony or terrace element comprising a concrete slab and a drainage device (1) comprising a pipe section (10) extending through the concrete slab and a channel section (20) extending along a surface of the concrete slab and firmly connected to the pipe section (10), wherein the channel section (20) is embedded in the concrete slab and positively anchored in the concrete slab. The invention further relates to a drainage device for such a balcony or terrace element and a manufacturing method.

Description

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Description

[0001] The invention relates to a balcony or terrace element comprising or consisting of a concrete slab and a drainage device. The invention further relates to a drainage device for a balcony or terrace element and a manufacturing method.

[0002] Balcony or terrace slabs are usually prefabricated in a factory as precast concrete elements. To enable drainage of the precast concrete element, it has been common practice to cast a drainage channel directly into the balcony or terrace slab. For this purpose, a formwork, for example made of wood, is inserted during the manufacturing process so that a space within the formwork is not filled with concrete when the concrete is poured. Once the concrete has hardened, the formwork is removed, leaving a concrete channel.

[0003] It is known from the prior art to cast drain pipes directly into a concrete slab. DE 2 351 200 A1, for example, shows such a drain pipe cast into a balcony slab. Since the drain pipe extends through the entire concrete slab, anchoring the drain pipe is easy to achieve. However, the inflow to the drain pipe still occurs either via a slope in the concrete slab or via a channel. Both creating a slope and forming a channel are complex processes in the production of precast concrete elements.

[0004] From EP 3 379 000 A1, a drainage device for a balcony or terrace is known, comprising a pipe section and a channel section, wherein the channel section has anchoring elements for positive-locking embedding in a concrete slab.

[0005] WO 94/25696 A1, AT 006 559 U2 and DE 20 2017 002 357 U1 each disclose a balcony or terrace element with a drainage device consisting of a pipe section and a channel section, wherein the channel section extends along a surface of a concrete slab and is connected to the pipe section, and wherein the channel section is embedded in the concrete slab.

[0006] Known concrete channels, which are produced by formwork during the manufacturing process and essentially form a depression in the hardened concrete, have the further disadvantage, in addition to their complex manufacturing process, that it is not possible to insert a grate. For example, balcony or garden furniture cannot be placed securely in the area of the channel, as the channel is essentially a depression in the concrete slab. Furthermore, such channels in concrete slabs are not protected from dirt due to the lack of a grate. In particular, autumn leaves can significantly impair drainage performance.

[0007] The object of the invention is therefore to provide a balcony or terrace element that is easy to manufacture and offers improved, permanent drainage performance. Furthermore, it is an object of the invention to provide a drainage device for such a balcony or terrace element and a manufacturing method.

[0008] According to the invention, this problem is solved with regard to the balcony or terrace element by the subject matter of claim 1, with regard to the drainage device by the subject matter of claim 9 and with regard to the manufacturing method by the subject matter of claim 10.

[0009] Specifically, the invention is based on the idea of providing a balcony or terrace element comprising a concrete slab and a drainage device, wherein the drainage device has a pipe section and a channel section. The pipe section extends through the concrete slab. The channel section extends along a surface of the concrete slab and is firmly connected to the pipe section, wherein the channel section is embedded in the concrete slab and positively anchored in the concrete slab.

[0010] The balcony or terrace element according to the invention can include the concrete slab and the drainage system, and it is not excluded that further components may be included.

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The balcony or terrace element can consist of a concrete slab and a drainage system, or even just these two components or assemblies. In all cases, the balcony or terrace element can be a precast concrete component, particularly a precast concrete slab with an integrated drainage system.

[0011] The invention is based on the idea of providing a drainage system that is initially separate but is integrated directly into the concrete slab during the concrete pouring process. In this way, the drainage system becomes an integral part of the balcony or terrace element. This eliminates the need for complex formwork to maintain a concrete channel during manufacturing. The workload is significantly reduced because only the drainage system needs to be inserted into the outer formwork of the concrete slab before the concrete is poured. The channel section is positively connected to the concrete slab, thus ensuring effective drainage over the long term. Since the channel section remains in the concrete slab after the concrete has hardened, post-casting work is avoided. In the prior art, the formwork for the concrete drainage channel must be removed after the concrete has hardened. This step is eliminated, thereby reducing the manufacturing costs for the balcony or terrace element according to the invention compared to the prior art.

[0012] In a preferred embodiment, the channel section has a U-shaped cross-sectional contour with a base and two legs, with at least one anchoring element for positive-locking embedding in the concrete slab being arranged on each leg. The drainage device is preferably oriented in the concrete slab such that the base of the channel section runs parallel to a surface of the concrete slab. The legs can be oriented substantially perpendicular to the base. The anchoring elements arranged on the legs preferably penetrate deep into the concrete slab, resulting in secure fastening of the drainage device in the concrete slab. In this respect, the anchoring elements ensure a firm connection between the channel section and the concrete slab, which would not otherwise occur, since concrete and, for example, stainless steel do not bond with each other.

[0013] Specifically, the anchoring element can be formed by a flange with through-openings, wherein the material of the concrete slab penetrates the through-openings for positive-locking anchoring. In other words, the concrete flows between the through-openings when casting the concrete slab and thus, after hardening, forms a solid structure that positively locks the flange. Additionally, there is a force-fit holding component, which, however, is negligible compared to the positive-locking element.

[0014] In a further preferred embodiment of the invention, the channel section, in particular including its anchoring elements, is formed in one piece as a sheet metal part. This design results in a particularly cost-effective manufacture of the balcony or terrace element. Furthermore, it ensures that the drainage system has a high degree of watertightness. Particularly high cost efficiency can be achieved if the sheet metal part is bent into the channel section by multiple folds.

[0015] The pipe section is preferably firmly, and in particular permanently, connected to the bottom of the channel section. The connection can be made, for example, by a weld. A one-piece connection or a monolithic construction of the pipe section and channel section is also conceivable. This also results in a particularly good tightness of the drainage system.

[0016] The pipe section can also include a sleeve pipe and an inner pipe, the inner pipe having a connection fitting for a pipe socket of a piping system. The sleeve pipe thus surrounds the inner pipe and protects it from contamination during the manufacturing process. When the concrete for the concrete slab is poured, the sleeve pipe is thus enclosed by the concrete, with the sleeve pipe simultaneously preventing liquid concrete from coming into contact with the inner pipe.

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This means the inner pipe remains free and can be used to connect pipe couplings, for example to connect the balcony or terrace element to a pipe system for further irrigation.

[0017] In the invention, the drainage device can also include a grate that can be positively inserted into the channel section. The grate thus covers at least part of the channel section and prevents it from becoming dirty. The grate can also be driven over or walked on. Furthermore, it is possible to place garden or balcony furniture on the grate, as the grate provides a level surface. This allows the entire area of the balcony or terrace element to be used for placing garden or balcony furniture without the risk of, for example, a garden table tipping over. The grate ensures that table legs positioned in this area are level with the other table legs. Therefore, it is preferred that the grate has a height adapted so that one surface of the grate is flush with the surface of the concrete slab.

[0018] In a particularly preferred embodiment of the invention, the drainage device, in particular at least the pipe section and the channel section, is made of metal. The use of stainless steel as the material for the drainage device, in particular the pipe section and the channel section, is particularly preferred. The grate preferably comprises the same material as the channel section.

[0019] According to a subordinate aspect of the invention, a drainage device is provided for a balcony or terrace element, in particular for a balcony or terrace element as previously described, wherein the drainage device has a pipe section and a channel section, and wherein the channel section has anchoring elements with through-openings for positive-locking embedding in a concrete slab of the balcony or terrace element.

[0020] The advantages and preferred further developments described in connection with the balcony or terrace element apply analogously to the drainage device mentioned here.

[0021] A further subordinate aspect of the invention relates to a method for manufacturing a balcony or terrace element, in particular a balcony or terrace element as previously described. In the method according to the invention,

- formwork provided for pouring a concrete slab;

- a drainage device, in particular a drainage device as previously described, placed in the formwork in such a way that a pipe section of the drainage device protrudes above the formwork; and

- Concrete is poured into the formwork in such a way that the concrete forms a positive connection with the anchoring elements of the drainage system during hardening.

[0022] The manufacturing process according to the invention provides concrete and terrace slabs that achieve good drainage performance, whose drainage system includes a channel section that can be covered by a grate to create a level surface on the concrete or terrace slab, and which eliminates the need for additional formwork and corresponding work steps. The manufacturing process is thus improved in a cost-efficient manner.

[0023] To prevent concrete from penetrating the pipe section during pouring, a sleeve pipe or formwork bell can be arranged on the pipe section as formwork before the concrete is poured. The sleeve pipe can be attached to the channel section by welding. After the concrete has been poured, the sleeve pipe is preferably cut to the thickness of the concrete slab or cut to length. In another embodiment of the invention, the formwork bell is removed after the concrete has been poured, in particular after it has hardened. After removing the formwork bell, a socket pipe can be attached to the pipe section, in particular to a connecting spigot, and in particular connected.

[0024] The invention is described below with reference to an exemplary embodiment.

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The attached drawings explain this in more detail. They show

[0025] Fig. 1 shows a perspective view of a drainage device for a concrete or terrace element according to the invention in a preferred embodiment; and

[0026] Fig. 2 shows a sectional view of the drainage device according to Fig. 1 along the longitudinal axis of the pipe section;

[0027] Fig. 3 shows a perspective view of the drainage device according to Fig. 3 from below, with the sleeve pipe hidden;

[0028] Fig. 4 shows a perspective view of a drainage device for a concrete or terrace element according to a further preferred embodiment, wherein the pipe section is provided with a formwork bell; and

[0029] Fig. 5 shows a sectional view through the drainage device according to Fig. 4 in the area of the formwork bell.

[0030] Figure 1 shows a drainage device 1 comprising a pipe section 10 and a channel section 20. The pipe section 10 and the channel section 20 are rigidly connected to each other. The pipe section 10 is arranged at one longitudinal end of the channel section 20. Other arrangements are possible depending on the application. For example, the pipe section 10 can also be arranged in a central region of the channel section 20.

[0031] As can be seen in Fig. 2, the channel section 20 has a base 21 and two legs 22. In this respect, the channel section 20 forms a U-shaped cross-sectional contour. The legs 22 extend substantially perpendicular to the base 21.

[0032] In Fig. 2 it can also be seen that the legs 22 have an upper section which is double-walled by folding the sheet forming the channel section 20.

[0033] Approximately at the midpoint of the legs 22, the sheet metal forming the channel section 20 is bent outwards at an angle. This outwardly bent section forms an anchoring element 23 or a flange 24. In the embodiment shown here, the acute angle between the leg 22 and the anchoring element 23 or flange 24 is preferably less than 45°, particularly 30°. Other angles are possible. In any case, it is provided that there is an acute angle between the leg 22 and the anchoring element 23 or flange 24 that is less than 90°.

[0034] In Fig. 1, it is clearly visible that the flange 24 has several through-openings 25. The through-openings 25 are regularly formed over the entire length of the flange 24. Preferably, the through-openings 25 each comprise a rectangular opening contour.

[0035] The flange 24 with the through-openings 25 serves to anchor the drainage device 1 in a concrete slab. The concrete slab is usually produced by forming a formwork, which is mostly made of wood, and then filling the formwork with concrete. If necessary, steel reinforcements can be placed in the formwork beforehand and cast in during the pouring of the concrete.

[0036] Additionally, a drainage device according to Fig. 1 is inserted into the formwork. When the concrete is poured, the liquid concrete flows around the drainage device 1 and penetrates the through-openings 25 in the flange 24. Once the concrete has hardened, this results in a positive-locking, fixed connection between the drainage device and the concrete slab. The drainage device is preferably arranged such that the pipe section 10 completely penetrates the concrete slab and the channel section 20 is arranged in the concrete slab such that the upper edges of the legs 22 are flush with a surface of the concrete slab.

[0037] In Fig. 1 it is also clearly visible that the drainage section is divided by two grates 4110

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30 is covered. A different number of grates 30 is also possible. The grates 30 are, as shown in Fig. 2, positively inserted into the channel section 20. Preferably, the grates 30 are designed so that they are flush with the upper edges of the legs 22. End plates 26 can also be attached to the longitudinal ends of the channel section.

[0038] In the cross-sectional view according to Fig. 2, it can be seen that the pipe section has a sleeve pipe 11 and an inner pipe 12. The inner pipe 12 is significantly shorter than the sleeve pipe 11. The sleeve pipe 11 thus penetrates the concrete slab completely and can, for example, also protrude below the concrete slab. The sleeve pipe 11 is preferably welded to the channel section 20 and can be cut back to the thickness of the concrete slab after the concrete has been poured and, if necessary, hardened.

The inner pipe 12 forms a connecting piece 13, which has a conically tapered rim. The sleeve pipe 11 protects the inner pipe 12 during the pouring of the concrete for the concrete slab.

[0039] Fig. 3 shows the drainage device 1 in a perspective view from below, with the sleeve pipe 11 hidden so that the connection fitting 13 is clearly visible. The connection fitting 13 serves to accommodate a pipe socket of a piping system. This allows the drainage device of the concrete slab to be easily connected to a suitable drainage system or similar.

[0040] Instead of a sleeve pipe 11, a drainage device 1 can also consist solely of the inner pipe 12. To encase such a drainage device 1 in the concrete slab, a formwork bell 14 can be used. Fig. 4 shows a drainage device 1 in which the pipe section 10 is covered with a formwork bell 14 before the concrete for the concrete slab is poured. As the sectional view in Fig. 5 illustrates, the formwork bell 14 has a conical outer contour that tapers towards the channel section 20. The formwork bell 14 completely surrounds the inner pipe 12 and rests on the channel section 20. When the concrete for the concrete slab is poured, the formwork bell 14 is enclosed by the concrete, leaving an upper gripping section 15 of the formwork bell 14 exposed. The formwork bell can be gripped at this gripping section 15 and removed after the concrete has hardened. The conical shape of the formwork bell 14 facilitates its removal from the concrete slab.

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REFERENCE MARK LIST:

1 drainage device 10 pipe sections

11 Sleeve tube

12 inner tube

13 connection spigots

14 Formwork bell

15 Gripping section

20 Channel section

21 Floor

22 thighs

23 Anchoring element 24 Flange

25 Through opening 26 End plate

30 rust

Claims (14)

x bes AT 524 807 B1 2025-11-15 Ss N patent claims 1. Balcony or terrace element comprising a concrete slab and a drainage device (1) comprising a pipe section (10) and a channel section (20) extending along a surface of the concrete slab and being firmly connected to the pipe section (10), wherein the channel section (20) is embedded in the concrete slab and is positively anchored in the concrete slab, characterized in that the pipe section (10) extends through the concrete slab. 2. Balcony or terrace element according to claim 1, characterized in that the channel section (20) has a U-shaped cross-sectional contour with a base (21) and two legs (22), wherein at least one anchoring element (23) is arranged on each of the legs (22) for form-fitting embedding in the concrete slab. 3. Balcony or terrace element according to claim 2, characterized in that the anchoring element (23) is formed by a flange (24) with through openings (25), wherein the material of the concrete slab penetrates the through openings (25) for positive anchoring. 4. Balcony or terrace element according to one of the preceding claims, characterized in that the channel section (20), in particular including its anchoring elements (23), is formed in one piece as a sheet metal part. 5. Balcony or terrace element according to one of claims 2 to 4, characterized in that the pipe section (10) is firmly, in particular indetachably, connected to the bottom (21) of the channel section (20). 6. Balcony or terrace element according to one of the preceding claims, characterized in that the pipe section (10) has a sleeve pipe (11) and an inner pipe (12), wherein the inner pipe (12) has a connection spigot (13) for a pipe socket of a piping system. 7. Balcony or terrace element according to one of the preceding claims, characterized in that the drainage device (1) has a grate (30) which can be positively inserted into the channel section (20). 8. Balcony or terrace element according to one of the preceding claims, characterized in that the drainage device (1), in particular at least the pipe section (10) and the channel section (20), are made of metal, preferably stainless steel. 9. Drainage device (1) for a balcony or terrace element according to one of the preceding claims comprising a pipe section (10) and a channel section (20), wherein the channel section (20) has anchoring elements for positive-locking embedding in a concrete slab of the balcony or terrace element, characterized in that the anchoring elements have through openings (25). 10. Method for manufacturing a balcony or terrace element according to any one of claims 1 to 8, wherein: - a formwork for casting a concrete slab is provided; - a drainage device (1), in particular according to claim 9, is placed in the formwork; - concrete is poured into the formwork in such a way that the concrete is bonded with anchoring elements. menten (23) of the drainage device (1) forms a positive connection during hardening, characterized in that the drainage device (1) is inserted into the formwork in such a way that a pipe section (10) of the drainage device (1) protrudes beyond the formwork. 11. Method according to claim 10, characterized in that a sleeve tube (11) or a formwork bell (14) is arranged on the tube section (10) as formwork before the concrete is poured. 12. Method according to claim 11, characterized in that the sleeve tube (11) is cut to the thickness of the concrete slab after the concrete has been poured. 13. Method according to claim 11, characterized in that the formwork bell (14) is removed after the concrete has been poured, in particular after it has hardened. 14. Method according to claim 13, characterized in that after removing the formwork bell (14) a socket pipe is connected to the pipe section (10). This includes 2 sheets of drawings