Angled drain for flat roofs with a frame extending beyond the roof surface

Description

[0001] The invention relates to an angled drain for flat roofs with an enclosure projecting over the roof surface, with a drain pipe guided through the enclosure and with a flat sealing element having a recess.

[0002] EP 3 597 834 A1 discloses a component for a drainage device for a flat roof with a parapet, comprising an angled part made of an elastomer material with two legs, one of which, with an opening, can be arranged with its outer surface on the parapet projecting upwards from the top of the flat roof. The angled part is connected to a sealing film and a drain outlet.

[0003] Furthermore, DE 101 05 530 A1 shows a device for draining flat roofs with an edge finish, consisting of an inlet to which a horizontally running, outwardly projecting pipe section with an inclined surface section is connected.

[0004] US 5 615 526 A shows a device for drainage at the intersection of a wall and a roof surface.

[0005] An angled drain of the type mentioned in the generic term can be found in DE 200 02 607 U1 belonging to the applicant. The enclosure is understood to be a term used in technical terms, "parapet." The known angled drain comprises an elastic sealing element, called a foil body, and a plate body with a recess for connection to the drainpipe via a pipe socket. This angled drain has proven itself, but there is a need for a more stable design that can simultaneously ensure barrier-free drainage while also offering increased watertightness.

[0006] This object is solved by the features of claim 1. The subclaims relate to preferred embodiments of the invention.

[0007] The two drain bodies can each comprise a pipe socket and a partially annular flange body connected to the latter, which merges into an angled flange section via a bending edge, so that the flange body forms an L-shaped configuration with the flange section when viewed from the side.

[0008] The pipe sockets can be pushed into one another and form a locking connection, for example by inserting circumferential locking ring elements on the inner pipe socket and partially distributed counter-locking elements on an inner surface of the second pipe socket.

[0009] A reversed arrangement of the locking elements is also possible, in which the partial locking ring elements are arranged on an outer surface of the inner pipe socket and the circumferential locking ring elements are arranged on the inner surface of the second pipe socket.

[0010] The locking connection can create an advantageous, irreversible toothing and clamping area of ​​the sealing element.

[0011] At least one flat sealing element with a recess adapted to the inner pipe socket can be placed between the drain bodies, for example, a circular sleeve made of elastomer, plastic, or bitumen sealing membrane. When the two drain bodies are pressed together, the flat sealing element inevitably assumes an L-shape.

[0012] The drain bodies can be made of weather-resistant hard plastic, for example thermoplastic polymers such as PVC or ABS plastic, or of a corrosion-resistant metal alloy.

[0013] The two drain bodies, with the sealing element flanged between them, form an angled drain. Its two pipe sockets can be inserted into a duct opening in the parapet so that its larger flange body rests tightly against an inner surface of the parapet and its flange section rests tightly against the roof surface. The duct opening can have a gradient of 1° to 5°, preferably 2°. The drain pipe of any length inserted into the duct opening can be tightly bonded to the pipe socket of the angled drain.

[0014] With the angled drain according to the invention, any sealing membrane can be permanently fixed against external tensile forces by irreversibly pressing it with the clamping flange bodies.

[0015] In addition, additional pressing elements, such as sealing ribs incorporated into the flange bodies, can ensure increased tightness between the sealing membrane and the flange bodies of the angle drain.

[0016] Furthermore, at least one of the flange bodies can be permanently bonded to the installed sealing element, e.g., with a weather-resistant sealing and adhesive compound.

[0017] A great advantage is that the rainwater can drain away unhindered, without any damming edges or other obstacles.

[0018] The invention will now be explained in more detail using an example and the drawing. The figures show: Fig. 1 prefabricated drain bodies according to the invention, in a plan view of a flat side of the angled flange sections, before the two drain bodies are pressed together; Fig. 2 a section A - A according to Fig. 1 ; Fig. 3 the drain bodies according to Fig. 1in a perspective view; Fig. 4 an angle drain, composed of the drain bodies according to Fig. 1 , in a plan view of the flat sides of the flange sections, but without sealing element; Fig. 5 a section B - B according to Fig. 4 ; Fig. 6 the angle sequence according to Fig. 4 , in a plan view of a flat side of its flange bodies; Fig. 7 the angle sequence according to Fig. 4 , in a perspective view; Fig. 8 a schematic installation situation of the angle drain on a flat roof with parapet. and Fig. 9 the angle drain with compressed sealing element, in a perspective view.

[0019] Identical or similar elements may be provided with identical or similar reference numerals in the following figures. Furthermore, the figures of the drawing, their description, and the claims contain some features in combination. The exemplary embodiments illustrated in the figures are for descriptive purposes only and are not intended to limit the invention in any way.

[0020] The terms "upper", "lower", "inner" used below refer to the arrangement of the drain bodies or the angled drain shown in the drawing before or after installation on the flat roof.

[0021] In Figures 1, 2 and 3A drain body 1, referred to as the "first", is shown, which consists of a pipe socket 4 and a partially annular flange body 2. A round recess 3 is arranged on the flange body 2, which is slightly larger than the inside diameter of the pipe socket 4. The flange body 2 merges via a bending edge 6 tangent to the recess 3 into a flange section 8 bent at an obtuse angle β, as is particularly clearly shown in Fig. 3 can be seen. The angle β, measured between the flange section 8 and a plane E defined by the partially annular flange body 2, is 92 0< .

[0022] Furthermore, the Figures 1, 2 and 3 a second drain body 11 can be removed, comprising a second pipe socket 14 and a second partially annular flange body 12 with a recess 13, which merges via a bending edge 26 into a flange section 18 bent at almost the same angle β.

[0023] Preferably, the flange section 8 has an angle β that is 2° to 3° larger than the flange section 18, which ensures a stronger compression of the sealing element 7.

[0024] It is also worth mentioning that the flange section 8, when pressed, is flush with the complementary recess of the flange section 18, thus ensuring barrier-free drainage of the roof area to be drained. For this purpose, the flange section 18 is preferably installed in a recess in the waterproofing membrane running beneath the flange section 18.

[0025] The second pipe socket 14 has an inner diameter D2 that is not less than the outer diameter D1 of the first pipe socket 4, so that the pipe sockets 4; 14 can be pushed into each other. The second pipe socket 14 is shorter than the first; after pushing them together (see Figures 4 and 5), the inner pipe socket 4 protrudes beyond a free end 22 of the pipe socket 14. This in turn allows the sliding on of a drain pipe 5 (cf. Fig. 8 ) on the inner pipe socket 4 to the said end 22 of the pipe socket 14.

[0026] Preferably, the drain pipe 5 is inserted between the two pipe sockets 4; 14 and glued there.

[0027] Furthermore, on an outer casing 10 of the pipe socket 4 there are circumferential locking ring elements 15 made of hard plastic (cf. Fig. 1 ) are inserted, the tips of which (not shown) point outwards. Accordingly, complementary counter-locking elements are arranged on an inner side 17 of the shorter pipe socket 14.

[0028] Preferably, the counter-locking elements are designed as partial locking ring elements 16, in other words as sections of the locking ring elements distributed on the circumference of the inner side 17 (cf. Figures 2 and 3 ) is carried out.

[0029] Reference number "7" denotes a sealing element, indicated by a dashed line, with a recess 23 matching the outer diameter of the pipe socket 4. In this case, the sealing element 7 is made in the form of a flexible, 4 mm thick, circular elastomer sleeve. Furthermore, circumferential sealing ribs 19 are incorporated on both flange bodies 2, 12, which engage with the softer material of the intermediate elastomer sleeve during the subsequent pressing of the two drain bodies 1; 11 together.

[0030] In Figures 4, 5, 6 and 7 For the clarity of the drawing, the pressed-together drain bodies 1; 11 are shown without the sealing element 7. As can be seen from the Figures 4 and 5 As can be seen, the upper, inner pipe socket 4 projects beyond the free end 22 of the shorter pipe socket 14. Furthermore, Fig. 5 a schematically indicated locking connection 30 is shown, formed by the aforementioned locking ring elements 15 and 16.

[0031] An angle drain 100 composed of the drain bodies 1; 11 and a sealing element 7 flanged between them is shown in Fig. 9 shown. Increased stability and tightness are ensured not only by the interlocking locking ring elements 15 and 16 (cf. Figures 1 to 3 ), which compress the sealing element 7 on both sides, but also the sealing ribs 9, 19 (cf. Figures 3 and 7 ) and last but not least a permanent bonding of the sealing element 7 at least with the smaller flange body 2.

[0032] As the Fig. 8shows, a parapet (enclosure 20) with a slightly outwardly inclined through opening 24 projects over a flat roof sealing level 25, in the inlet area 27 of which the angle drain 100 with its two pipe sockets 4, 14 is installed and fastened to the enclosure 20 and the flat roof by means of screws (not shown). The screws are screwed in via peripheral openings 28 (screw head receptacles) distributed on the flange body 12. The drain pipe 5 inserted into the through opening 24 forms an angle α of a value of approximately 92 0< with the flange body 2; 12.

[0033] Consequently, a barrier-free angle drain 100 is created which is characterized by increased, permanent stability and tightness, the locking connection 30 of which has an irreversible toothing and tensioning area 21 (cf. Figures 8 and 9 ) of the sealing element 7. List of reference symbols:

[0034] 1 Drain body 2 Flange body 3 Recess 4 Pipe socket 5 Drain pipe 6 Bend edge 7 Sealing element 8 Flange section 9 Sealing rib 10 Outer casing (v. 4) 11 Drain body 12 Flange body 13 Recess 14 Pipe socket 15 Ring locking elements (annular) 16 Ring locking elements (partial) 17 Inside (v. 14) 18 Flange section 19 Sealing rib 20 Surround 21 Interlocking and bracing area 22 End (v. 14) 23 Recess (v. 7) 24 Through opening 25 Flat roof / flat roof sealing level 26 Bend edge 27 Inlet area 28 Opening (screw head receptacle) 30Snap-in connection αAngle βAngle D1Outer diameter D2Inner diameter ELevel 100 Angle drain

Claims

1. Angular drain (100) for flat roofs that have a projecting (20) surround above the roof surface, the drain comprising a drain pipe (5) passed through the surround (20) and comprising a flat sealing element (7) that has a cut-out (23), characterized in that the sealing element (7) is irreversibly pressed together on both sides by drain bodies (1; 11), specifically - by a first drain body (1) which comprises a first flange body (2) having a central cut-out (3) for water drainage and a first pipe nozzle (4) connected to the flange body (2), - and by a second drain body (11) which comprises a second flange body (12) having a central cut-out (13) and a second pipe nozzle (14) connected to the flange body (12), the two flange bodies (2; 12) each comprising a flange section (8; 18) which is angled along a respective bending edge (6; 26) outside the cut-out (3; 13), a section (17) of the sealing element (7) being arranged between the angled flange sections (8; 18) in the pressed-together state, wherein the second pipe nozzle (14) has an inside diameter (D2) which is not smaller than an outside diameter (D1) of the first pipe nozzle (4), so that the cutouts (3; 13) and the pipe nozzles (4; 14) and the cut-out ( 23) of the sealing element (7) are arranged coaxially to one another when the two drain bodies (1; 11) are joined together.

2. Angular drain (100) according to claim 1, characterized in that the two pipe nozzles (4; 14) can be inserted into one another to form a snap-in connection (30).

3. Angular drain (100) according to claim 1 or 2, characterized in that the snap-in connection (30) is formed from snap-in ring elements (15) arranged peripherally on an outer casing (10) of the inner pipe nozzle (4) and from complementary partial snap-in ring elements (16) on an inside (17) of the pipe nozzle (14).

4. Angular drain (100) according to claim 3, characterized in that the snap-in elements (15; 16) - in the pressed-together state of the two drain bodies (1; 11) - form an irreversible interlocking and bracing area (21) of the sealing element (7).

5. Angular drain (100) according to one of claims 1 to 4, characterized in that the flange bodies (2; 12) as well as the flange sections (8; 18) are provided with sealing ribs (9; 19) directed onto the sealing element (7), the ribs engaging in the material of the sealing element (7).

6. Angular drain (100) according to one of claims 1 to 5, characterized in that the angled flange section (8; 18) - as seen in a longitudinal axial section of the Angular drain - is arranged at an obtuse angle (β) with respect to a plane (E) defined by the flange body (2).

7. Angular drain (100) according to one of claims 1 to 6, characterized in that the angle (β) lies between 92° and 93°.

8. Angular drain (100) according to one of claims 1 to 7, characterized in that the flange body (2; 12) lies at an obtuse angle (α) of between 91° and 95° with respect to the drain pipe (5) - as seen in a longitudinal axial section of the Angular drain.

9. Angular drain (100) according to one of claims 1 to 8, characterized in that the sealing element (7) consists of a plastically or elastically deformable flat material, such as bitumen or plastic webs, preferably elastomeric webs.

10. Angular drain (100) according to one of claims 1 to 9, characterized in that the sealing element (7) flanged in between the flange bodies (2; 12) is permanently bonded to at least one of the flange bodies (2; 12).