Frame, recreational vehicle with the frame and methods for manufacturing and attaching the frame

Abstract

A frame (1), in particular for a recreational vehicle like a motor home or a caravan, wherein the frame (1) is configured to be attached to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, comprises an overlapping portion (5), which overlaps a wall portion W surrounding the wall opening in an attached state, where the frame (1) is attached to the wall portion W. The overlapping portion (5) comprises an attaching portion (6) which faces the wall portion W in the attached state. The frame (1) further comprises a first gasket (9), provided on the attaching portion (6), wherein the first gasket (9) is configured to seal the overlapping portion 5 of the frame 1 against the wall portion W in the attached state. The first gasket (9) comprises a foam material.

Description

[0001] FRAME, RECREATIONAL VEHICLE WITH THE FRAME AND METHODS FOR MANUFACTURING AND ATTACHING THE FRAME

[0002] The present invention refers to a frame, a recreational vehicle, like a motor home or a caravan, comprising the frame and a method for manufacturing and for attaching the frame.

[0003] Independent travelling with recreational vehicles gets more and more popular. A recreational vehicle such like a motor home or a caravan conventionally comprises a main body with a wall and openings in the wall. The openings are used for windows, air conditioners, service doors, doors, ventilation grilles, or the like, and are equipped with frames. The frames are attached to the wall around the openings. To protect the frames from the wall and the environment from external environmental influences, such as rain, wind, etc., the frames are equipped with gaskets. Of particular importance is a design and a material of the gasket. While the material of the gasket influences lifetime and manufacturing processes as for example the degree of automatization and associated costs herewith, the design essentially influences the water tightness and a frame design associated with the overall appearance.

[0004] Conventional frame gaskets in recreational vehicles are made of Butyl-based or silicone-based materials. Usually, such frame gaskets are applied manually to the frame. Butyl-based or silicone-based gaskets tend to stick both to the frame and the wall of the recreational vehicle. Hence, common decorative decals which are attached to the frame or the wall need a clearance around the frames as otherwise the gaskets may be damaged due to friction and movements of the frame relative to the wall of the recreational vehicle.

[0005] Accordingly, one of the objections to be solved by the present invention is to provide a frame with a gasket resulting in a simplified manufacturing process, a better sealing effect and a clean and attractive design and overall appearance. Besides that, a further objection of the present invention is to provide a corresponding recreational vehicle as well as appropriate methods for manufacturing and attaching such a frame.

[0006] These objects are solved by the present invention as claimed by the accompanied independent claims. Preferred embodiments of the present invention are to be found in the dependent claims.

[0007] According to a first aspect of the present invention, a frame, in particular for a recreational vehicle like a motor home or a caravan, wherein the frame is configured to be attached to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, comprises an overlapping portion, which overlaps a wall portion surrounding the wall opening in an attached state, where the frame is attached to the wall portion. The overlapping portion comprises an attaching portion which faces the wall portion in the attached state. The frame comprises a first gasket which is provided on the attaching portion. The first gasket is configured to seal the overlapping portion of the frame against the wall portion in the attached state, and the first gasket comprises a foam material.

[0008] With this configuration, a light and effective sealing can be achieved. By using a foam material, the weight of the first gasket is reduced compared to conventional gaskets used in recreational vehicles and the required compression for the effective sealing can be achieved. Advantageously, the foam material can be applied to the frame automatically. This allows the dimensions of the first gasket to be adapted locally to the required contact pressure for the effective sealing. A further advantage is that due to the design of the frame, in particular due to the use of the foam material, the frame only rests against an outer wall of the recreational vehicle via the first gasket. If a decorative decal, for example a decorative foil, is attached to the outer wall, a relative movement of the frame is harmless for the decorative decal, since only the first gasket and not the frame touches the decorative decal.

[0009] Within the scope of this disclosure and the present invention a wall opening is understood to be an opening in the wall of the recreational vehicle. The opening may be used to mount windows, air conditioners, service doors, doors, ventilation grilles, or the like at the recreational vehicle.

[0010] Preferably, according to the present invention the frame further comprises a second gasket, which is provided on the attaching portion, wherein the second gasket is located outside the first gasket when viewed from a top view of the frame.

[0011] The second gasket advantageously protects the first gasket. When cleaning a gap between the frame and the wall of the recreational vehicle, for example using a high-pressure cleaner on short distance, the second gasket prevents the high pressure water from directly impacting on the first gasket. Thus, the second gasket reduces damages of the first gasket caused by misuse, high pressure water or heavy rain. Furthermore, the second gasket shields the first gasket from UV-radiation. This results in an increased lifetime of the first gasket.

[0012] Further preferably, according to the present invention the second gasket is lower than the first gasket in a height direction, wherein the height direction is defined as a direction perpendicular to a main extending plane of the frame.

[0013] By reducing the height of the second gasket, at least the first gasket touches the wall of the recreational vehicle and ensures a sealing effect of the frame. Advantageously, the height of the second gasket is high enough to ensure the protective effect of the first gasket. The height of the second gasket can be for example, 25%, 50% or 75% of the height of the first gasket. The second gasket may be high enough to contact the wall portion, when the frame is attached to the wall portion. Alternatively, the height of the second gasket may be low enough to ensure ventilation to dry the gap between the first and second gasket, for example after a rain fall.

[0014] Especially preferably, the frame according to the present invention comprises a first groove and a second groove, wherein the first groove and the second groove are provided on the attaching portion, and the first gasket is inserted in the first groove such that the first gasket is partially accommodated in the first groove, and the second gasket is inserted in the second groove such that the second gasket is partially accommodated in the second groove.

[0015] By inserting the first and second gasket in the first and second groove, a form-fit connection can be obtained, resulting in a better adhesion of the first and second gasket and a better protection against impacting water with high pressure. By a partial accommodation it is understood that the gaskets are preferably entirely accommodated along their longitudinal direction in the groove but the gaskets are only partially accommodated in a direction perpendicular to the main extending plane of the frame, for example, by 20%, 30% or 50%. The cross-sectional shape of the groove can be rectangular, square, semicircular, segmental arch, rounded or pointed.

[0016] Preferably, according to the present invention a cross-sectional shape of the first gasket is asymmetrically formed and / or a dimension of the cross-sectional shape of the first gasket varies along a longitudinal direction of the first gasket.

[0017] By the asymmetrical shape of the cross-section of the first gasket, the required compression for the effective sealing is reached. The cross-sectional shape can be asymmetrical in every direction, for example, perpendicular or parallel to the main extending plane of the frame. The variation of the dimension of the cross-sectional shape ensures a local adaption of the compression and consequently of the contact pressure, if desired and / or required. The varying dimension can be a length, width, radius, protruding lengths, for example.

[0018] Further preferably, according to the present invention the asymmetrical cross-sectional shape of the first gasket is formed, such that the first gasket is capable of being compressed by a range of 30% to 70% in the height direction, when the frame is in the attached state.

[0019] The compression of the first gasket ensures the required amount of contact pressure of the first gasket.

[0020] Preferably, according to the present invention the foam material of the first gasket is a polyurethane foam material, in particular a two-component polyurethane foam material. A polyurethane foam is light material with a low density. A polyurethane foam is automatically applicable on the frame using automated devices, resulting in reduced manufacturing and assembly costs. Furthermore, with the polyurethane foam the required compression and the required contact pressure can be obtained. Compared to the commonly used gaskets in recreational vehicles the polyurethane foam is more sustainable an does not stick to the wall of the recreational vehicle, when the frame is attached to the wall. By doing so the above-mentioned advantages in terms of the decorative decal can be achieved. Alternatively, the first gasket can be made of a silicone foam material.

[0021] Preferably, according to the present invention the second gasket is made of an EPDM material or alternatively of a foam material, in particular a two-component polyurethane foam material.

[0022] Since the EPDM material is a more stable and harder material, the protection of the first gasket can be increased. Alternatively, the second gasket can be made of a silicone foam material.

[0023] Preferably, the frame according to the present invention is made of Aluminum, polyurethane or a plastic material.

[0024] By making the frame of Aluminum, polyurethane or a plastic material a weight of the frame can be reduced and the adhesion of the gasket on the frame can improved. The plastic material may be an Acrylonitrile Styrene Acrylate (ASA).

[0025] According to another aspect of the present invention, a recreational vehicle, in particular a motor home or a caravan, comprises at least one of the frames according to the present invention as described above.

[0026] Such a recreational vehicle benefits from the plurality of advantages of the frame according to the present invention.

[0027] According to a further aspect of the present invention, a method for manufacturing a frame according to the present invention, in particular one of the frames described above, comprises the step of providing the frame, configured to be attached to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle. The frame comprises an overlapping portion, which overlaps a wall around the wall opening in an attached state, where the frame is attached to the wall around the wall opening. The overlapping portion comprises an attaching portion which faces the wall in the attached state. The method comprises the further step of providing a first gasket on the attaching portion, wherein the first gasket is configured to seal the overlapping portion of the frame against the wall portion in the attached state. The first gasket comprises a foam material, preferably a polyurethane foam material, and more preferably a two-component polyurethane foam material. With this method, it is possible to achieve the above described frame and its preferable technical effect.

[0028] Preferably, according to the present invention, the step of providing the first gasket is performed by applying the first gasket on the attaching portion using an automated device, wherein the step of applying the first gasket on the attaching portion is performed in a time range less than two minutes.

[0029] The automated device comprises in particular a robot with a robot arm. The automated device further comprises in particular an automated dosing system which can be attached to the robot arm for example. By using the automated device, the positions where the gaskets are to be applied can be tracked automatically so that the gaskets can always be applied at the same position on the frames. This improves the quality of the gasket. Furthermore, an automated dispensing system allows local changes of the gasket, for example changes of the cross-sectional shape and the dimensions. This can be achieved, for example, by adjusting a nozzle geometry of the automated dosing system, a distance between the nozzle and the attaching portion or an angle between the nozzle and the attaching portion.

[0030] Preferably, according to the present invention, the step of applying the first gasket on the attaching portion is performed in a time range of 10 to 50 seconds.

[0031] This ensures that the step of applying the first gasket is completed before a material of the gasket cures. A short curing time speeds up the manufacturing process of the frame.

[0032] Preferably, the method according to the present invention further comprises the steps of providing a first groove on the attaching portion, applying an adhesive in the first groove, and inserting the first gasket in the first groove such that the first gasket is partially accommodated in the first groove.

[0033] By additionally applying adhesive in the first groove, the adhesion of the first gasket is improved. In particular, if the frame is made of a polyurethan or a plastic based material, the step of providing the first groove on the attaching portion may be part of an injection molding process of the frame, for example. In particular, if the frame is made of Aluminum based profiles, the step of providing the first groove on the attaching portion may be part of an extrusion process of the profiles, for example.

[0034] The step of inserting the first gasket in the first groove may include the step of applying the first gasket as a liquid into the first groove. In a next step, the liquid gets expanded to the foam material by a chemical reaction.

[0035] Preferably, the method according to the present invention further comprises the step of providing a second gasket on the attaching portion, wherein the second gasket is located outside the first gasket when viewed from a top view of the frame. With this method according to the present invention, it is possible to manufacture the above described frames in a simple and time saving manner. Hence, this offers to achieve the therewith related advantages.

[0036] Preferably, according to the present invention, the step of providing the second gasket is performed by providing the second gasket, which is lower than the first gasket in a height direction, wherein the height direction is defined as a direction perpendicular to a main extending plane of the frame.

[0037] With this method according to the present invention, it is possible to manufacture the above described frames to achieve the therewith related advantages.

[0038] Preferably, according to the present invention, the step of providing the second gasket is performed by providing the second gasket, which is made of an EPDM material. Alternatively, the second gasket is made of a foam material, in particular a two-component polyurethane foam material.

[0039] With this method according to the present invention, it is possible to manufacture the above described frames to achieve the therewith related advantages.

[0040] Preferably, according to the present invention, the step of providing the second gasket is performed by applying the second gasket on the attaching portion using the automated device, wherein the step of applying the second gasket on the attaching portion is performed in a time range less than two minutes.

[0041] With this method according to the present invention, it is possible to manufacture the above described frames in a simple and time saving manner. Hence, this offers to achieve the therewith related advantages and mutatis mutandis the same effects and advantages related to the step of applying the first gasket on the attaching portion.

[0042] Preferably, according to the present invention, the step of applying the second gasket on the attaching portion is performed in a time range of 10 to 50 seconds.

[0043] This ensures that the step of applying the second gasket is completed before a material of the gasket cures. A short curing time of the first gasket material speeds up a manufacturing process of the frame.

[0044] Preferably, the method according to the present invention further comprises the steps of providing a second groove on the attaching portion, applying an adhesive in the second groove, and inserting the second gasket in the second groove such that the second gasket is partially accommodated in the second groove. With this method according to the present invention, it is possible to manufacture the above described frame in a simple and time saving manner. Hence, this offers to achieve the therewith related advantages and mutatis mutandis the same effects and advantages related to the steps corresponding to the first groove and the first gasket.

[0045] Preferably, the method according to the present invention further comprises the step of applying the first gasket on the attaching portion using the automated device, wherein a cross-sectional shape of the first gasket is asymmetrically formed and / or a dimension of the cross-sectional shape of the first gasket varies along a longitudinal direction of the first gasket.

[0046] With this method according to the present invention, it is possible to manufacture the above described frame in a simple and time saving manner. Hence, this offers to achieve the therewith related advantages.

[0047] According to a further aspect of the present invention, a method for attaching a frame according to the present invention, in particular one of the frames described above, to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, comprises the steps of providing the frame with a first gasket, wherein the first gasket comprises a foam material, positioning the frame on a wall portion surrounding the wall opening, and pressing the frame against the wall portion, such that the first gasket is compressed by at least 20% in a direction perpendicular to the wall portion.

[0048] This method depicts a preferred operation of a frame according to the present invention. With this method according to the present invention, it is possible to attach the above described frames in a simple and time saving manner to the wall of a recreational vehicle. Optionally, the method comprises a step of fixing the frame at the wall portion using fixing members, such as threaded fasteners, clips, adhesive, or the like for example.

[0049] The features and advantages described with reference to the frame and the recreational vehicle of the present invention apply mutatis mutandis and vice versa to the methods of the present invention.

[0050] A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description of embodiments of the present invention in connection with the accompanying drawings, wherein:

[0051] FIG. 1 is a partial cross-sectional view of a window frame of a recreational vehicle in a first embodiment; and FIG. 2 is a partial cross-sectional view of a window frame of a recreational vehicle in a second embodiment, wherein the window frame comprises a second gasket, and the window frame is attached to a wall of the recreational vehicle.

[0052] A selected embodiment of the present invention will now be described with reference to the accompanying drawings FIG. 1 and FIG. 2, wherein identical reference signs designate corresponding or identical elements throughout the various drawings.

[0053] FIG.1 shows a partial cross-sectional view of a window frame 1 of a recreational vehicle like a motor home or a caravan in a first embodiment. The recreational vehicle comprises a wall and an opening in the wall. The wall of the recreational vehicle comprises a wall portion Wsurrounding the opening. In the illustrated embodiment, the window frame 1 is attached to the opening, which is explained later in more detail. The window frame 1 comprises a main extending plane EP, an outer side 2 and an inner side 3. If the window frame 1 is attached to the opening, the outer side 2 of the window frame 1 points outwards of the recreational vehicle, and the inner side 3 of the window frame 1 points inwards of the recreational vehicle. The main extending plane EP is defined by being substantially parallel to the wall of the recreational vehicle, when the window frame 1 is in an attached state, where the window frame 1 is attached to the wall portion W.

[0054] The window frame 1 comprises a main frame body 4 and an overlapping portion 5 which protrudes laterally outwards from the main frame body 4 along the main extending plane EP. The overlapping portion 5 overlaps the wall portion W around the opening, if the window frame 1 is in the attached state. The overlapping portion 5 comprises an attaching portion 6, at which the window frame 1 is attached to the wall portion W. When the window frame 1 is in the attached state, the attaching portion 6 faces the wall portion W.

[0055] In the illustrated embodiment, a first groove 7 is provided at the attaching portion 6. The first groove 7 has a rectangular cross-sectional shape with rounded inner edges. A second groove 8 is provided at the attaching portion 6. The second groove 8 has a cross-sectional shape which consists of a rectangle and a semicircle. The second groove 8 is located outside the first groove 7 when viewed from a top view of the window frame 1 . In other words, when viewing the main extending plane EP in the top view, the second groove 8 is located further outside the first groove 7. The first and second groove 7, 8 can be made for example simultaneously with the window frame 1 , if the window frame 1 is made by an injection molding process in a case, where the window frame 1 is made of a polyurethan and a plastic material. In a case, where the window frame 1 is made of Aluminum based profiles, the first and second groove 7, 8 can be made in an extrusion process of the profiles, for example. As illustrated in FIG.1 , the window frame 1 comprises a first gasket 9. The first gasket 9 is configured to seal the overlapping portion 5 of the window frame 1 against the wall portion W in a case, where the frame is in the attached state. The window frame 1 is sealed in such a way that no water, air or the like can enter the interior of the recreational vehicle from outside over the attaching portion 6. The first gasket 9 is inserted in the first groove 7 for a better adhesion of the first gasket 9. The first gasket 9 is partially accommodated in the first groove 7 by approximately 30% of a height of the first gasket 9. The height of the first gasket 9 is defined by a height direction H which is perpendicular to the main extending plane EP in a direction towards the inner side 3 of the window frame 1 . The height direction H is indicated by a black arrow in FIG.1.

[0056] A cross-section of the first gasket 9 has a shape which consists of a rectangle with two rounded edges 10 and two non-rounded edges 11 . The non-rounded edges 11 are located in the first groove 7. The rounded edges 10 are located in the height direction H more outwards. This enables the first gasket 9 to be compressed and deformed sufficiently to ensure the required contact pressure to seal the window frame 1.

[0057] The first gasket 9 is made of a foam material. In the illustrated embodiment, the foam material is a polyurethane-based material, in particular a two-component based polyurethane foam. Alternatively, the foam material is a silicone-base material.

[0058] FIG. 2 illustrates a partial cross-sectional view of the window frame 1 of a recreational vehicle in a second embodiment, when the window frame 1 is attached to the wall portion W of the recreational vehicle. In the second embodiment, the window frame 1 comprises a second gasket 12. The second gasket 12 is provided on the attaching portion 6 of the window frame 1 . The second gasket 12 is configured to protect the first gasket 9, when the window frame 1 is in the attached state. For example, the second gasket 12 protects the first gasket 9 from UV-radiation and water which could impact on the first gasket 9 with high pressure, for example caused by a high-pressure cleaner on a short distance. To obtain a better adhesion of the second gasket 12, the second gasket 12 is inserted in the second groove 8 such that the second gasket 12 is located outside the first gasket 9 when viewed from the top view of the window frame 1 . The second gasket 12 is partially accommodated in the second groove 8 by approximately 30% of a height of the second gasket 9. The height of the second gasket 12 is defined by the height direction H as the height of the first gasket 9.

[0059] In the illustrated embodiment, the second gasket 12 is made of an EPDM material. In another embodiment, the second gasket 12 is made of a polyurethane-based material, in particular a two- component based polyurethane foam. Since the EPDM material is a more stable and harder material than the material used for the first gasket 9, the second gasket 12 is capable to protect the first gasket 9, as described above. As illustrated in FIG.2, the window frame 1 comprises an inner circumferential protruding portion 13 which is provided further inside the first gasket 9, when viewed from the top view of the window frame 1 . A height of the inner circumferential protruding portion 13 is larger than a thickness of the wall portion W. The height of the inner circumferential protruding portion 13 is defined in the height direction H. The inner circumferential protruding portion 13 facilitates the positioning of the window frame 1 , when the window frame 1 is to be attached to the wall portion W.

[0060] In the following, a method to attach the window frame 1 to the wall portion 9 is described. When the window frame 1 is to be attached to the wall portion 9, the window frame 1 with the first gasket 9 is provided, wherein the first gasket 9 comprises the foam material. In a next step, the window frame 1 is positioned on the wall portion W which surrounds the opening. The inner circumferential protruding portion 13 is used to align the window frame 1 with edges of the opening. In a final step, the window frame 1 pressed against the wall portion W, such that the first gasket 9 is compressed by at least 20% in a direction perpendicular to the wall portion, which corresponds to the height direction H. To achieve the required contact pressure, the first gasket 9 is compressed preferably by a range of 30% to 70% in the height direction H. In the illustrated embodiment, the second gasket 12 is also compressed by at least 20% in the height direction H. In the illustrated embodiment, the compression of the first and second gasket 9, 12 is associated with a deformation and squeezing of the first and second gasket 9, 12.

[0061] Within this disclosure always when there is given a reference to at least one / at least two components having a specific feature / implementation, not necessarily all of the corresponding components have to be provided with this specific feature / implementation. Also, only several (or even only one) of the corresponding components can be provide with the corresponding feature / implementation as long as this does not contradict the therewith achieved effect of overall configuration according to the present invention.

[0062] REFERENCE SIGNS

[0063] 1 window frame

[0064] 2 outer side

[0065] 3 inner side

[0066] 4 main frame body

[0067] 5 overlapping portion

[0068] 6 attaching portion (6)

[0069] 7 first groove

[0070] 8 second groove

[0071] 9 first gasket

[0072] 10 rounded edges

[0073] 11 non-rounded edges

[0074] 12 second gasket

[0075] 13 inner circumferential protruding portion

[0076] EP main extending plane

[0077] H height direction

[0078] W wall portion

Claims

CLAIMS1 . A frame (1), in particular for a recreational vehicle like a motor home or a caravan, wherein the frame (1) is configured to be attached to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, the frame (1) comprising: an overlapping portion (5), which overlaps a wall portion (W) surrounding the wall opening in an attached state, where the frame (1) is attached to the wall portion (W), wherein the overlapping portion (5) comprises an attaching portion (6) which faces the wall portion (W) in the attached state, a first gasket (9), provided on the attaching portion (6), wherein the first gasket (9) is configured to seal the overlapping portion (5) of the frame (1) against the wall portion (W) in the attached state, characterized in that the first gasket (9) comprises a foam material.

2. Frame (1) according to claim 1 , characterized in that the frame (1) comprises a second gasket (12), which is provided on the attaching portion (6), wherein the second gasket (12) is located outside the first gasket (9) when viewed from a top view of the frame (1).

3. Frame (1) according to claim 1 or 2, characterized in that the second gasket (12) is lower than the first gasket (9) in a height direction (H), wherein the height direction (H) is defined as a direction perpendicular to a main extending plane (EP) of the frame (1).

4. Frame (1) according to one of the proceeding claims, characterized in that the frame (1) comprises a first groove (7) and a second groove (8), wherein the first groove (7) and the second groove (8) are provided on the attaching portion (6), and the first gasket (9) is inserted in the first groove (7) such that the first gasket (9) is partially accommodated in the first groove (7), and the second gasket (12) is inserted in the second groove (8) such that the second gasket (12) is partially accommodated in the second groove (8).

5. Frame (1) according to one of the proceeding claims, characterized in that a shape of a cross-section of the first gasket (9) is asymmetrically formed and / or a dimension of the shape of the cross-section of the first gasket (9) varies along a longitudinal direction of the first gasket (9).

6. Frame (1) according to claim 5, characterized in that the asymmetrical shape of the cross-section of the first gasket (9) is formed, such that the first gasket (9) is capable of being compressed by a range of 30% to 70% in the height direction (H), when the frame (1) is in the attached state.

7. Frame (1) according to one of the proceeding claims, characterized in that the foam material of the first gasket (9) is a polyurethane foam material, in particular a two- component polyurethane foam material.

8. Frame (1) according to one of the claims 2 to 7, characterized in that the second gasket (12) is made of an EPDM material or a foam material, in particular a two- component polyurethane foam material.

9. Frame (1) according to one of the proceeding claims, characterized in that the frame (1) is made of Aluminum, polyurethane or a plastic material.

10. A recreational vehicle, in particular a motor home or a caravan, is characterized in that the recreational vehicle comprises at least one frame (1) according to one of the preceding claims.

11. A method for manufacturing a frame (1), in particular a frame (1) according to one of the claims 1 to 9, characterized by the steps of: providing the frame (1), configured to be attached to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, wherein the frame (1) comprises an overlapping portion (5), which overlaps a wall around the wall opening in an attached state, where the frame (1) is attached to the wall around the wall opening, wherein the overlapping portion (5) comprises an attaching portion (6) which faces the wall in the attached state, and providing a first gasket (9) on the attaching portion (6), wherein the first gasket (9) is configured to seal the overlapping portion (5) of the frame (1) against the wall portion (W) in the attached state, and wherein the first gasket (9) comprises a foam material, preferably a polyurethane foam material, and more preferably a two-component polyurethane foam material.

12. Method according to claim 11 , wherein the step of providing the first gasket (9) is characterized by the step of: applying the first gasket (9) on the attaching portion (6) using an automated device, wherein the step of applying the first gasket (9) on the attaching portion (6) is performed in a time range less than two minutes.

13. Method according to claim 12, wherein the step of applying the first gasket (9) on the attaching portion (6) is characterized by performing the step of applying the first gasket (9) on the attaching portion (6) in a time range of 10 to 50 seconds.

14. Method according to one of the claims 11 to 13, characterized by the further steps of: providing a first groove (7) on the attaching portion (6), applying an adhesive in the first groove (7), and inserting the first gasket (9) in the first groove (7) such that the first gasket (9) is partially accommodated in the first groove (7).

15. Method according to claim 14, wherein the step of inserting the first gasket (9) in the first groove (7) is characterized by: applying the first gasket (7) as a liquid into the first groove (7), and the liquid gets expanded to the foam material by a chemical reaction.

16. Method according to one of the claims 11 to 15, characterized by the further step of: providing a second gasket (12) on the attaching portion (6), wherein the second gasket (12) is located outside the first gasket (9) when viewed from a top view of the frame (1).

17. Method according to claim 16, wherein the step of providing the second gasket (12) is characterized by: providing the second gasket (12), which is lower than the first gasket (9) in a height direction (H), wherein the height direction (H) is defined as a direction perpendicular to a main extending plane (EP) of the frame (1).

18. Method according to claim 16 or 17, wherein the step of providing the second gasket (12) is characterized by: providing the second gasket (12), which is made of an EPDM material.

19. Method according to claim 16 or 17, wherein the step of providing the second gasket (12) is characterized by: providing the second gasket (12), which is made of a foam material, in particular a two-component polyurethane foam material.

20. Method according to claim 19, wherein the step of providing the second gasket (12) is characterized by the step of: applying the second gasket (12) on the attaching portion (6) using the automated device, wherein the step of applying the second gasket (12) on the attaching portion (6) is performed in a time range less than two minutes.

21. Method according to claim 20, wherein the step of applying the second gasket (12) on the attaching portion (6) is characterized by performing the step of applying the second gasket (12) on the attaching portion (6) in a time range of 10 to 50 seconds.

22. Method according to one of the claims 16 to 21 , characterized by the further steps of: providing a second groove (8) on the attaching portion (6), applying an adhesive in the second groove (8), and inserting the second gasket (12) in the second groove (8) such that the second gasket (12) is partially accommodated in the second groove (8).

23. Method according to one of the claims 12 to 22, characterized by the further step of: applying the first gasket (9) on the attaching portion (6) using the automated device, wherein a shape of a cross-section of the first gasket (9) is asymmetrically formed and / or a dimension of the shape of the cross-section of the first gasket (9) varies along a longitudinal direction of the first gasket (9).

24. A method for attaching a frame (1) according to one of the claims 1 to 9 to a wall opening, in particular a window opening and / or a wall opening of the recreational vehicle, characterized by the steps of: providing the frame (1) with a first gasket (9), wherein the first gasket (9) comprises a foam material, positioning the frame (1) on a wall portion (W) surrounding the wall opening, and pressing the frame (1) against the wall portion (W), such that the first gasket (9) is compressed by at least 20% in a direction perpendicular to the wall portion (W).

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