BE1023271B1 - Method for manufacturing a roof drain and roof drain - Google Patents

Abstract

The present invention relates to a method for manufacturing a roof drain 1 for the discharge of rainwater in particular, comprising the steps of: - providing a drain pipe 2; - providing a clamping bush 3; and - providing a plate-shaped part 4 with a plate opening 5, the method further comprising the steps of bulging an edge 6 of the plate opening 5 around the clamping bush 3, whereby a bulged part 7 is obtained, the around the bulged part 7 placing an end 8 of the drain pipe 2, and deforming the drain pipe 2 to fix the plate-shaped part 4 between clamping bush 3 and drain pipe 2. The present invention further relates to a roof drain 1 for the drainage of rainwater in particular.

Description

METHOD FOR MANUFACTURING A ROOF DRAIN AND

ROOF DRAIN

TECHNICAL DOMAIN

The invention relates to a method for manufacturing a roof drain and to a roof drain.

BACKGROUND ART

A roof drain is a device for the drainage of water, in particular rain water, and is well known in the art. NL 1 036 985 describes a roof outlet and method for manufacturing a roof outlet. In the method, an opening is made in a plate-shaped part and an edge of the opening is pushed into a metal tube, after which an inner tube is inserted into the metal tube, such that the inwardly bent edge is at least partly between the metal tube and the metal tube. inner tube. The components are interconnected by means of gluing or applying a constriction in the tube. NL 1 036 985 has the problem that the use of gluing or constriction can give rise to an incomplete connection between the components of the roof bushing. Such an incomplete connection is undesirable, since there are no guarantees for the permanent adhesion between the components of the roof bushing. NL 9 201 790 describes a plug for rainwater drainage, comprising a lead plate with a hole and an aluminum pipe that is tightly fixed in the hole, the relevant end of the pipe having bulges and the deformable plate having a collar at the location of the hole has, which with the aid of a stainless steel clamping bush to be pressed into the relevant end, keeps the collar in pressing contact with the protrusions. When manufacturing the insert, use is made of a draw mandrel, with which both the collar and the clamping bush are pressed into the relevant end. NL 9 201 790 obtains an adhesion between the parts of the insert via a mechanically pressing contact. The necessity of bulging the pipe with this bonding causes the problem that the bonding method is rather complex. In addition, in the case of small irregularities of the protrusions, the risk may arise that an incomplete connection is obtained between the parts of the insert.

It is an object of the present invention to find a solution to at least some of the aforementioned problems.

To this end, the present invention seeks a simple method for manufacturing a roof drain with a form-fitting connection between the components of this roof drain.

SUMMARY OF THE INVENTION

A first aspect of the present invention relates to a method for manufacturing a roof drain 1 for the drain of, in particular, rain water, comprising the steps of: providing a drain pipe 2; providing a clamping bush 3; and providing a plate-shaped part 4 with a plate opening 5, the method further comprising the steps of bulging an edge 6 of the plate opening 5 around the clamping bush 3, whereby a pinned part 7 is obtained, placing it around the pinned part 7 from one end 8 of the drain pipe 2, and deforming the drain pipe 2 to attach the plate-shaped part 4 between clamping bush 3 and drain pipe 2.

Placing an end 8 of the drain pipe 2 around the pinned part 7 and subsequently deforming the drain pipe leads to a clamping of the pinned part 7 between clamping bush 3 and drain pipe 2. Thus the plate-shaped part 4 is connected to the drain pipe 2. This connection is intuitive and simple to carry out since a deformation of the most externally located part, namely the discharge pipe 2, is used to effect the connection. In addition, performing the distortion requires only simple operations.

A second aspect of the present invention relates to a roof drain 1 for the drainage of, in particular, rain water, comprising a drain pipe 2, a clamping bush 3 and a plate-shaped part 4, the plate-shaped part 4 comprising a plate opening 5 with a pinned part 7 as an extension of an edge 6 of the opening 5, the pinned part 7 adapted to sit clampedly in a form-locked manner between an end 8 of the discharge pipe 2 and the clamping bush 3, wherein the discharge pipe 2 comprises a thermoplastic.

Because the discharge pipe 2 comprises a thermoplastic, it is highly deformable at elevated temperatures. Based on this, a form-locked connection can easily be obtained between drain pipe 2, plate-shaped part 4 and clamping bush 3. This ensures optimum adhesion between the components of the roof drain 1, so that the service life of the roof drain 1 is large.

DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic representation of a series of process steps leading to the manufacture of a roof drain 1, according to embodiments of the present invention.

DETAILED DESCRIPTION

A first aspect of the present invention relates to a method for manufacturing a roof drain 1 for the drain of, in particular, rain water, comprising the steps of: providing a drain pipe 2; providing a clamping bush 3; and providing a plate-shaped part 4 with a plate opening 5, the method further comprising the steps of bulging an edge 6 of the plate opening 5 around the clamping bush 3, whereby a pinned part 7 is obtained, placing it around the pinned part 7 from one end 8 of the drain pipe 2, and deforming the drain pipe 2 to attach the plate-shaped part 4 between clamping bush 3 and drain pipe 2.

Said drain pipe 2 is a tubular object that is adapted to drain water, in particular rain water. In embodiments, the provision of a discharge pipe 2 comprises the provision of a tailor-made discharge pipe 2, the customized removal of a desired quantity of a longer pipe on discharge pipe 2, or the customized manufacture of a discharge pipe 2. Said clamping bush 3 is a tubular object which is adapted to be placed internally of the discharge pipe 2 so as to be able to clamp said pinned part 7 between clamping sleeve 3 and discharge pipe 2. In embodiments, the provision of a clamping bush 3 comprises the provision of a clamping bush 3, the custom removal of a desired quantity of clamping bush 3 from a larger object, or the customized manufacture of a clamping bush 3. Said plate-shaped part 4 is arranged for resting on a portion of a roof and for directing water, in particular rain water, to the drain pipe 2. In embodiments, providing said plate-shaped part 4 comprises making said part 4 available, removing said part 4 from a larger object, or manufacturing said part to size. Drain pipe 2, clamping bush 3 and plate-shaped part 4 can comprise one or more suitable materials as known from the prior art. For reasons of watertightness and sturdiness, drain pipe 2, clamping bush 3 and plate-shaped part 4 can be constructed from one or more layers.

The plate-shaped part 4 is preferably made of a waterproof material. In one embodiment the plate-shaped part comprises 4 bitumen. In another embodiment, the plate-shaped member 4 comprises ethylene propylene diene monomer (EPDM) rubber, a type of synthetic rubber. EPDM rubber is an elastomer that is characterized by a wide range of applications. EPDM rubber is used, among other things, as a waterproof cover for roofs. EPDM rubber does not contaminate the drained rainwater, which is of vital importance if a person wants to use this water for personal hygiene applications. Another suitable material for the plate-shaped part 4 is a thermoplastic polyolefin. Thermoplastic polyolefins herein refer to polymer / filler blends which usually comprise a certain fraction of polypropylene, polyethylene, block copolymer polypropylene, or rubber, in addition to a reinforcing filler. Suitable fillers include, but are not limited to, talc, fiberglass, carbon fiber, wollastonite, and metal oxy sulfate. Suitable rubbers include ethylene-propylene rubber, EPDM rubber, ethylene-octene rubber, ethylene-butadiene rubber, and styrene-ethylene-butadiene-styrene rubber. In embodiments, the plate-shaped part 4 comprises one or more flexible plastics, such as plastics with thermoplastic properties, such as, but not limited to, polyethylene, polypropylene and / or polyvinyl chloride. In embodiments, the plate-shaped part 4 comprises a structure comprising one or more layers reinforced with carbon fibers, glass fibers, or other high-strength fibers.

The bulging of the edge 6 of the plate opening 5 around the clamping sleeve 3 is preferably carried out by pulling the plate opening 5 initially made with a smaller cross-section around the circumference of the clamping sleeve 3.

Deforming the discharge tube 2 is achieved in preferred embodiments by selecting a discharge tube 2 from a deformable material. This discharge tube 2 is then deformed while it is placed around the pinned part 7. In another embodiment, deformation of the drain pipe 2 is obtained by applying a clamping and inwardly directed force on the circumference of the drain pipe 2, after the drain pipe 2 has been placed around the pinned part 7. A known press can be used for this latter embodiment. Because of its simplicity, in contrast to more complex methods for manufacturing a roof drain as known from the prior art, the manufacture of a roof drain 1 in which the parts are adhered to each other by deforming the drain pipe 2 is not obvious to call for a skilled person skilled in the art.

Placing an end 8 of the drain pipe 2 around the pinned part 7 and subsequently deforming the drain pipe leads to a clamping of the pinned part 7 between clamping bush 3 and drain pipe 2. Thus the plate-shaped part 4 is connected to the drain pipe 2. This connection is intuitive and simple to carry out since a deformation of the most externally located part, namely the discharge pipe 2, is used to effect the connection. In addition, performing the distortion requires only simple operations.

Said form-locked connection ensures that the roof drain 1 according to the present invention is water-tight and airtight. This offers the advantage that a good water-sealing and odor-sealing adhesion exists between the drain pipe 2 and the plate-shaped part 4, wherein water falling on the plate-shaped part 4 flows directly into the drain pipe 2.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the discharge pipe 2 comprises a thermoplastic and the method further comprises the step of heating the discharge pipe 2 before said end 8 of the pipe 2 surrounds the pinned part 7 is placed, and wherein the deformation of the discharge pipe 2 takes place during the placing of the pipe 2.

The term "thermoplastic" is used herein for a polymeric material that is pliable, malleable, or fluidable above a specific temperature and substantially hardens upon cooling. Examples of thermoplastic polymers include, but are not limited to, vinyl-containing thermoplastics: such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, and other vinyl and vinylidene resins and copolymers thereof; polyethylene compounds: such as low density polyethylene and high density polyethylene and copolymers thereof; styrene compounds: such as ABS, SAN and polystyrenes and copolymers thereof, polypropylene and copolymers thereof; saturated and unsaturated polyesters; acrylic; polyamides such as nylon-containing species; engineering plastics such as acetyl, polycarbonate, polyimide, polysulfone, polyphenylene oxide and sulfide resins and the like.

Via the heating of the thermoplastic discharge pipe 2 before said end 8 of the pipe 2 is placed around the pinned part 7, wherein the deformation of the discharge pipe 2 takes place during the placing of the pipe 2, a form-tight bond between discharge tube 2 and plate-shaped part 4. The necessity of other more effort required fastening techniques such as welding, gluing, rolling and / soldering also becomes unnecessary, as well as operations that often accompany bonding, such as degreasing a surface and / or priming. Moreover, the connection obtained with the aid of a thermoplastic is insensitive to corrosion, in contrast to the well-known welding or soldering connections of traditional roof drains with metal parts. In addition, the roof drain 1 is advantageous in the context of health and environmental considerations, since the use of a formable thermoplastic makes the traditional use of formable parts in lead superfluous. The connection obtained with the aid of a thermoplastic for manufacturing the roof drain 1 is certainly not obvious for a person skilled in the art who is familiar with the state of the art. After all, such a person would rather resort to the traditional combination of metal parts and fixing techniques applicable to metal for the production of a roof drain.

In one embodiment, the heated and therefore flexible material of the drain pipe can moreover be bent locally, so that a roof drain 1 is obtained which is suitable for functioning as a side outlet element. This means that the latter embodiment of a roof drain 1 is suitable for draining water, in particular rain water, in a horizontal, slightly downward, direction. For this purpose, in clamp embodiments, the clamping bush 3 is designed obliquely.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the thermoplastic comprising drain pipe 2 is radially heated from the inside to the outside. As a result, the heat will first reach the interior of the discharge pipe 2 tube, as a result of which this interior can be optimally heated. Since the interior of the discharge pipe 2 is brought into contact with the pivoted part 7, the connection between discharge pipe 2 and potted part 7 will be positively influenced by said radial heating.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the discharge tube 2 is heated with a gaseous medium. Due to its great freedom of movement, a gaseous medium can easily reach the entire surface of the discharge pipe 2 to be heated. Any way of offering a heated gaseous medium, as known in the art, can be employed. For example, a stream of hot air can be blown to the tube 2, or the tube 2 can be placed in a convection oven.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, the method further comprising the step of cooling at least the pinned part 7, the end 8 of the discharge pipe 2 around the pinned part 7, and the clamping bush 3 at the level of the pinned part 7, wherein cooling takes place after placing and deforming the heated drain pipe 2 around said pinned part 7. By cooling, the heated pipe comprising thermoplastic comprising thermoplastic is brought to a lower temperature, whereby the liquefied material of the discharge pipe 2 hardens again. In this way a firm and form-fitting connection between discharge pipe 2, clamping sleeve 3 and plate-shaped part 4 is obtained.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein cooling is carried out by placing at least the pinned part 7, the end 8 of the discharge pipe 2 around the pinned part 7, and the clamping bush 3 at the height of the pinned part 7 in cooled water. When cooled by means of cooled water, the cold of the water is transferred in a simple manner over the entire submerged volume of the roof drain 1. In other embodiments, cooling is carried out by means of a gaseous medium. In yet another embodiment, cooling is carried out by means of ice. A fine distribution of the ice is thereby conducive to the transfer of the cold.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, the method further comprising the step of cutting the plate-shaped part 4.

The cutting can be performed manually or mechanically using a knife. In other embodiments, the cutting is done by punching. In embodiments, the plate opening 5 is also cut from the plate-shaped part 4. In embodiments in which the plate-shaped part 4 is provided with an internal reinforcement, the plate opening 5 can be enlarged if desired by pulling the plate-shaped part 4 along the opening 5 over the widening body of a tapered structure. In embodiments, the said tapered structure is a conical structure.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the bulging of an edge 6 of the plate opening 5 around the clamping sleeve 3 is carried out by placing the clamping sleeve 3 around the wide base 9 of a tapered mold 10, followed by moving the plate opening 5 around said mold 10 and clamping sleeve 3 placed along the tapered point 11 of the mold 10 towards the said base 9. In this way the plate opening 5 with originally smaller diameter is stretched and the plate-shaped part 4 is placed closed around the clamping bush 3 by means of the molded part 7 formed around the circumference of the clamping bush 3.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the method further comprises the step of placing the clamping bush 3 provided with the surrounding stub part 7 around a truncated mold 12. In such a way clamping bush 3 and plate-shaped part 4 are conveniently fixed, as a result of which a targeted placement of the end 8 of the discharge pipe 2 around the pinned part 7 is simplified in a later step.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, the method further comprising the step of forming the clamping bush 3 by rolling up and welding a metal lath 13. Forming the clamping bush 3 offers the advantage that the diameter of the clamping bush 3 can be optimally matched to the diameter of the discharge pipe 2. For welding, any welding process as known in the art can be used, including arc welding, electrical resistance welding, autogenous welding, pressure welding, spot welding and bundle welding. The clamping sleeve preferably comprises aluminum or stainless steel and most preferably aluminum.

In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the welding of the metal lath 13 to form the clamping bush 3 is carried out by TIG welding. TIG welding or Tungsten Inert Gas welding belongs to the electric arc welding category. TIG welding offers the advantage, among other things, that the welding process does not cause splashes. As a result, a person carrying out the welding process has a very good view of the melting bath, and the solid melting of welding splashes on the metal lath 13 or clamping bush 3, or on the environment, is avoided.

In an embodiment, in an additional step, the roof drain 1 is placed in an opening or on the contours of an existing or to be erected roof, wherein the plate-shaped part 4 rests on said roof and a roof covering is further laid on the plate-shaped part 4. In embodiments, the plate-shaped part 4 comprises an adhesive layer. With such an adhesive layer, this part 4 can be attached to said roof. In embodiments, said roofing comprises a bitumen product or a flexible plastic, such as a polyvinyl product or an ethylene-propylene-diene monomer product. In embodiments, the roof covering is glued and / or welded, wherein a hole is cut in the roof covering at the location of the opening. In embodiments, heating is used

A second aspect of the present invention relates to a roof drain 1 for the drainage of, in particular, rain water, comprising a drain pipe 2, a clamping bush 3 and a plate-shaped part 4, the plate-shaped part 4 comprising a plate opening 5 with a pinned part 7 as an extension of an edge 6 of the opening 5, the pinned part 7 adapted to sit clampedly in a form-locked manner between an end 8 of the discharge pipe 2 and the clamping bush 3, wherein the discharge pipe 2 comprises a thermoplastic.

Because the discharge pipe 2 comprises a thermoplastic, it is highly deformable at elevated temperatures. Based on this, a form-locked connection can easily be obtained between drain pipe 2, plate-shaped part 4 and clamping bush 3. This ensures optimum adhesion between the components of the roof drain 1, so that the service life of the roof drain 1 is large.

In a preferred embodiment, the present invention provides a roof drain 1 according to the second aspect of the invention, wherein the drain pipe 2 comprises polyethylene.

Polyethylene is a thermoplastic and is therefore particularly suitable as material for the drain pipe 2 of the roof drain 1 according to the present invention. Polyethylene also has favorable properties such as high robustness, high electrical resistance, low water absorption, relatively low rigidity and high tensile strength.

In embodiments, the drain pipe 2 of the roof drain 1 has a length of 200 to 800 mm, and more preferably of 350 to 650 mm. In embodiments, the discharge tube 2 has a diameter of 30 to 300 mm, and more preferably of 40 to 180 mm.

In a preferred embodiment, the present invention provides a roof drain 1 according to the second aspect of the invention which is manufactured using a method according to the first aspect of the invention. EXAMPLES EXAMPLE 1

FIG. 1, comprising the sub-figures FIG. 1-1, FIG. 1-II and FIG. 1-III, is a schematic representation of a series of process steps leading to the manufacture of a roof drain 1, according to embodiments of the present invention.

In a first step, the contours of a round plate-shaped part 4 are cut out of a sheet of EPDM rubber, and a plate opening 5 is further cut out of this. The diameter of the plate opening 5 is chosen such that it is smaller than the diameter of the clamping sleeve 3 to be produced.

In a second step, an aluminum slat 14 is rolled up and then the ends of the slat 14 facing each other are welded together by TIG welding. The diameter of the clamping bush 3 thus obtained is adjusted to the diameter of the discharge pipe 2 to be produced.

In a third step, the clamping bush 3 is first placed around the wide base 9 of a conical mold 10, after which the plate-shaped part through its plate opening 5 around said mold 10 and along the tapered point 11 of the mold 10 towards the said base 9 placed clamping bush 3 is moved. Thus, a pinned part 7 of the plate-shaped part 4 is formed. This pinned part 7 can be seen as a part of the plate-shaped part 4 which is folded around the clamping bush 3. By making use of the cone-shaped mold 10, and pulling out the plate-shaped part 4 during its displacement, a form-locked adhesion between pinned part 7 and clamping bush 3 is obtained.

In a fourth step, an end 8 of a discharge pipe 2 comprising a polyethylene and is heated with heated air 16 which is supplied by means of a heating device 15.

In a fifth step, the whole of clamping bush 3 and around it form-locked plate-shaped part 4 is mounted on a truncated mold 12, after which the discharge tube 2 is placed over the pinned part 7 by means of its heated end 8. Due to the heating in the previous step, the polyethylene material of the drain pipe 2 can be deformed, so that the drain pipe 2 can deform flexibly and can optimally adapt to the shape of the pinned part 7. In this way a form-locked connection between drain pipe 2 becomes plate-shaped part 4 and clamping bush 3, wherein the pinned part 7 is clamped between discharge pipe 2 and clamping bush 3.

In a sixth and final step, the whole of discharge pipe 2, clamping sleeve 3 and plate-shaped part 4 is removed from the truncated mold 12, after which the plate-shaped part 4, clamping sleeve 3, and the part of the discharge pipe 2 in the vicinity of the heated end 8 are immersed in a container 17 with cooled water 18, after which a cooled roof drain 1 is removed from said container 17. As a result of cooling, the heated pipe comprising polyethylene and which is polyethylene is brought to a lower temperature, whereby the flowed material of the discharge pipe 2 hardens again. The roof drain 1 thus obtained is therefore an extremely sturdy and form-locked whole, and this as a result of the extremely strong and form-tight bond between drain pipe 2, clamping bush 3 and plate-shaped part 4.

Although the example has been described for a drain pipe 2 and clamping bush 3 with a round cross-section, and a plate-shaped part 4 with a round cross-section as plate opening 5, the present invention is of course applicable to embodiments with non-round cross-sections, such as, but not limited to , square sections, triangular sections or hexagonal sections. The contours of the plate-shaped part 4 are also not limited to a round shape, but can have any other shape, such as, but not limited to, a square, triangular or hexagonal shape.

Claims (13)

CONCLUSIONS A method for manufacturing a roof drain (1) for the drainage of, in particular, rain water, comprising the steps of: providing a drain pipe (2); providing a clamping bush (3); and providing a plate-shaped part (4) with a plate opening (5), characterized in that the method further comprises the steps of bulging an edge (6) of the plate opening (5) around the clamping bush (3) whereby a pinned part (7) is obtained, placing an end (8) of the drain pipe (2) around the pinned part (7), and deforming the drain pipe (2) to attach the plate-shaped part (4) between clamping bush (3) and discharge pipe (2), characterized in that the discharge pipe (2) comprises a thermoplastic and that the method further comprises the step of heating the discharge pipe (2) before said end (8) of the pipe ( 2) is placed around the pinned part (7), and that the deformation of the discharge pipe (2) takes place during the placing of the pipe (2). Method according to claim 1, characterized in that the thermoplastic discharge pipe (2) is radially heated from the inside to the outside. Method according to claim 1 or 2, characterized in that the discharge pipe (2) is heated with a gaseous medium. Method according to any of claims 1 to 3, characterized in that the method further comprises the step of cooling at least the pinned part (7), the end (8) of the discharge pipe (2) around the pinned part (7), and the clamping bush (3) at the level of the pinned part (7), wherein the cooling takes place after placing and deforming the heated discharge pipe (2) around said pinned part (7). Method according to claim 4, characterized in that the cooling is carried out by placing at least the pinned part (7), the end (8) of the discharge pipe (2) around the pinned part (7), and the clamping bush (3) at the height of the pinned part (7) in cooled water. Method according to one of claims 1 to 5, characterized in that the method further comprises the step of cutting out the plate-shaped part (4). Method according to one of claims 1 to 6, characterized in that the bulging of an edge (6) of the plate opening (5) around the clamping bush (3) is carried out by placing the clamping bush (3) around the wide base (9) of a tapered mold (10), followed by moving the plate opening (5) around said mold (10) and along the tapered point (11) of the mold (10) towards the said base ( 9) clamping bush (3) placed. A method according to any one of claims 1 to 7, characterized in that the method further comprises the step of placing the clamping bush (3) provided with the surrounding stub part (7) around a truncated mold (12). A method according to any one of claims 1 to 8, characterized in that the method further comprises the step of forming the clamping bush (3) by rolling up and welding a metal slat (13). Method according to claim 9, characterized in that the welding of the metal slat (13) to form the clamping bush (3) is carried out by TIG welding. Roof drain (1) for drainage, in particular rain water, comprising a drain pipe (2), a clamping bush (3) and a plate-shaped part (4), the plate-shaped part (4) comprising a plate opening (5) with a shunt part (7) as an extension of an edge (6) of the opening (5), characterized in that the discharge pipe (2) comprises a thermoplastic and that the pinned part (7) is clamped thermally-formally between an end (8) ) of the drain pipe (2) and the clamping bush (3). Roof drain (1) according to claim 11, characterized in that the drain pipe (2) comprises polyethylene. Roof drain (1) according to claim 11 or 12 manufactured with the aid of a method according to one of claims 1 to 10.