Procedure for connecting the outer tubes of an inflatable tube system

Abstract

In the field of inflatable structures, a method is provided for connecting the outer tubes (10, 20) of an inflatable tubing system. This concerns outer tubes (10, 20) that have an opening area (12, 22) containing an opening (11, 21). According to the method, a connection pattern (13, 23) with a multitude of connection openings (14, 24) is applied around the opening (11, 21) in the opening area (12, 22) of each of the outer tubes (10, 20). Next, the outer tubes (10, 20) are placed against each other at the opening areas (12, 22) and connected to each other by fastening the connection patterns (13, 23) of the outer tubes (10, 20) together, possibly with the aid of a threading body (50) that is threaded alternately through connection openings (14, 24) of the connection pattern (13, 23) of one outer tube (10, 20) and connection openings (14, 24) of the connection pattern (13, 23) of the other outer tube (10, 20).

Description

Procedure for connecting the outer tubes of an inflatable tube- ste|se| The invention is in the field of inflatable structures, and generally relates to a method for connecting outer tubes of an inflatable tube system. This method is primarily intended to be applied during the manufacture of a device with an inflatable pipe system. A well-known example of a setup with an inflatable tube- ste|se| is an inflatable tent. Inflatable tents come in various shapes and sizes. available and have diverse applications, such as recreational applications, mili- taire applications and applications in the context of assistance. A general An advantage of using tents is a high degree of flexibility in creating of a sealed-off space at a desired location, at least temporarily and in advance upcoming cases (semi-)permanent. Conventional tents are constructed from cloth or sail that is shaped with poles. The poles can be rigid poles. are, which may be composed of multiple the|s, and which on the inside are placed on the side and / or the outside of the canvas or sail. It is also known for to use bendable sticks and form them into an arch. A disadvantage of the conventional use of poles to pitch tents to build is that knowledge is required to place the sticks correctly. Other disadvantages are that, especially in the case of a large tent, often multiple per- tools are needed for the various poles of the tent during the pitching of the tent to hold in the correct position until the entire assembly of canvas or tarpaulin and poles is underneath tension is attached to the substrate. There are also well-known designs in which poles must be threaded through slots in the canvas or tarpaulin. This often takes a lot. time and effort. An inflatable tent does not have the disadvantages of a pole tent. An inflatable tent has a tube system instead of poles that can be filled with air. filled. Setting up an inflatable tent therefore requires no more than introduction of air into the said piping system via one or more air openings. This can be done, for example, with a manually operated pump or an electric pump. be done. After inflating the inflatable tent, the one or more are air vents of the piping system closed and the tent remains in shape until the one or more air vents are opened again to let air out of the piping system and thereby bring the tent into a state where it can be folded. and / or rolled up and can be transported. The tubing system of an inflatable tent typically includes inner- tubes that serve to contain the air and outer tubes in which the inner- pipes extend. For the piping system, in conjunction with the design, Various shapes are possible for the inflatable tent in question. In many cases, there is at least one crossing of outer pipes in the piping system. Such a crossing Singing of outer tubes is present, for example, in tents with an arch perpendicular to the tent and a connecting piece in the longitudinal direction of the tent. For the execution of a Regarding the crossing of outer tubes, there are various possibilities in the state of the art. present, including the use of Velcro to attach the outer tubes to each other to fasten, application of straps to pull the outer tubes together, where the outer tubes can be split into two parts to fit together properly fitting, and application of sewing or welding techniques to join the outer tubes together to confirm. It is also possible to opt for the tent design in the design above each other | allowed outer tubes to cross. The known possibilities for realizing a cross of External pipes have various disadvantages. For example, the strength of the intersection can be too un- sen over|aten. This is less of an issue when applying sewing or hemming techniques, but In that case, realizing the crossing of external pipes in that way is complicated. It is a purpose of the invention to provide a possibility for the to provide a crossing of external pipes that on the one hand easily is under construction and which on the other hand contributes to a reliable and sturdy character of the cross sing |eidt. The invention provides a method for connecting to each other outer tubes of an inflatable tube system, where: - each of the outer tubes has an opening area containing an opening, - in the opening area of ​​each of the outer tubes a connection pattern with a multitude of connecting openings is made around the opening, and - the outer tubes are pressed against each other at the location of the opening areas placed and connected to each other by the connection patterns of the to fasten outer tubes together. According to the invention, the outer tubes are at the location of opening- areas in the outer pipes connected to each other. It is therefore possible to in the inflatable tubing system to have only a single level of outer tubes. Around the openings of the opening areas, a connecting pattern is created with connection openings are made. Next, the connection openings are used to firmly connect the outer tubes to each other. The outer tubes can be connected to each other in arbitrary downward orientations. In the context of for the invention this does not necessarily have to be done in a perpendicular orientation. The method according to the invention may involve the use of a stringing body. encompass like a flexible cord. Fastening the connecting The patterns of the outer tubes are then created by the lacing body alternately. through connection openings of the connection pattern of one outer tube and to thread the connection openings of the connection pattern of the other outer tube. According to another realistic possibility, the connection pattern of one of the outer tube loops. Connecting the connection patterns of the External tubing is then done by installing loops in succession by so- indeed a connecting opening of the other outer tube as a loop that previously through a preceding connection opening of the other outer tube has been made. In this in connection it is possible that the connection pattern of the other outer tube also includes loops. In the context of the invention, it has been shown that, based on the fastening the connection patterns of the outer tubes together a very sturdy connection of the outer pipes to each other can be realized. An additional The advantage of the invention is that the said connection can be detachable. After all, in the case of using a lacing body, the lacing body could be threaded and can be re-threaded at a later time, and in In the case of using loops, the stitch made could come apart. be retrieved and can be reformed at a later time. This is possible be interesting for repair purposes, for example when an inner tube serves to be replaced. The invention covers various possibilities for applying the connection pattern around the opening in the opening area of ​​each of the outer pipes. Practical examples are listed below. A first practical example includes: - providing a cord, and - alternately fasten the|s of the cord to the outer tube and leave loops in the cord. A second practical example includes: - provide a cord and a support such as a piece of cloth or tarpaulin, - alternately secure parts of the cord to the carrier and leave loops in the cord, and - attaching the carrier to the outer tube. In the first practical example and the second practical example the connection openings in the connection pattern are formed by the loops in the cord. A third practical example includes: - providing a cord and flap parts, - firmly connect a first section of the flap parts to the outer tube, in a row in the opening area of ​​the outer tube, - the cord in the row of flap parts |hedges, and - fold a second part of the flap sections around the cord through the opening and firmly connect to the outer tube. A fourth practical example includes: - provide a cord, flap parts and a support such as a piece of cloth or tarpaulin, - firmly attach a first section of the flap parts to the carrier, in a row an edge of the carrier, - the cord in the row of flap parts |eggen, - a second part of the flap parts over the edge of the carrier around the cord fold over and securely connect to the carrier, and - attaching the carrier to the outer tube. In the third practical example and the fourth practical example are the connecting openings in the connection pattern formed by openings between the flap sections, which are bounded on one side by the cord, and on the other side are bounded by an edge of the outer tube or the support respectively. It is a real possibility that the cord is laid in the flap sections in such a way that loops are formed between the flap sections are formed. A fifth practical example applies in particular to the possibility of using a stringing body and includes: - providing a perforated strip, and - connect the perforated strip to the outer tube. In the fifth practical example, the connecting openings are in the connection pattern formed by perforation openings in the strip. Combinations of different types of connection patterns are possible and it is therefore by no means necessary that the outer tubes be of the same type connection pattern are provided. In the context of the invention, it is possible that a barrier in the external pipes are installed. This is done, for example, by a piece barrier material provided with connecting openings on its perimeter to provide and prior to connecting the outer tubes between to place the opening areas of the outer tubes, and a threading body that is used to fasten the connection patterns of the outer tubes together also make by threading through the connecting openings of the piece of barrier material. A barrier in the outer tubes functions to prevent that when an inner if the tube breaks, another inner tube expands in the resulting space and as a result bursts from it. In other words, a barrier in the outer tubes has the function separate from each other spaces into which inner tubes extend, so that piece moving from one inner tube need not have any consequences for the other inner tube. tube. A practical example of the piece of barrier material is a piece of cloth or tarpaulin. In accordance with the foregoing, the invention has further relating to a device comprising an inflatable tubing system with outer tubes each of which has an opening area containing an opening and at the location of the connect opening areas to each other, and each of which is provided in the opening area of a connection pattern with a multitude of connection openings around the opening, where the connection patterns of the outer tubes are attached to each other- made. As has already been explained, a first possibility is that a stringing body de- alternating through connecting openings of the connection pattern of the one outer- pipe and connection openings of the connection pattern of the other outer pipe is strung, and is a second possibility that the connection pattern of one of comprises the outer tube loops, and that the loops are arranged sequentially by both a connection opening of the other outer tube and a loop that through a adjacent connection opening of the other outer tube has been installed. The various further possibilities mentioned above in connection with the working method according to the invention are defined and explained in a corresponding manner applicable to the device according to the invention. For the sake of completeness, it is noted that the piping system of the arrangement in a practical implementation further comprises at least one inner tube which extends at least partially through the outer tubes. The inner tube does not need to not necessarily to be formed as a single tube, and can be, for example, T-shaped or be X-shaped, or comprise a central section with at least two branches. Practical examples of the arrangement according to the invention are a tent, a kite, a drone, a piece of furniture and a support or suspension construction. Practical examples of a piece of furniture are a cupboard and a seat. furniture. Practical examples of a support or suspension structure are a mast for antennas and floodlights, a truss system where speakers and hanging lights at a stage, and a finish arch at a sports competition. The invention will be explained below by means of the figures, which are generally schematic in design and relate to various parts and sections of an inflatable tubing system, including outer tubes and inner tubes of the piping system, where equal venNijzing figures equal or indicate comparable parts, and where: Figure 1 schematically shows and illustrates a first outer tube in the flat state. how the first outer tube in an opening area thereof is provided with a connection pattern formed by an alternation of parts of a cord that be firmly connected to the outer tube and loops in the cord; Figure 2 schematically shows and illustrates a first outer tube in the flat state. how the first outer tube in an opening area thereof is provided with a connection pattern formed by a cord folded into a row flap parts; Figure 3 schematically shows and illustrates a first outer tube in the flat state. how the first outer tube in an opening area thereof is provided with a connection pattern formed by a perforated strip; Figure 4 schematically shows an assembly of the first outer tube of Figure 1 in round condition and shows a first inner tube in a coiled state; Figure 5 schematically shows the assembly of Figure 4, with the first inner tube in unrolled state; Figure 6 schematically shows an assembly of a second outer tube in the round state and shows a second inner tube in a coiled state; Figure 7 schematically shows the assembly of Figure 6, with the second inner tube in unrolled state; Figure 8 schematically shows an exploded view of a combination of the together- set of the first outer tube and the first inner tube, the assembly of the second outer tube and the second inner tube, a lacing body and an optional barrier piece- material; Figure 9 illustrates how the first outer tube and the second outer- are connected with the lacing body. pipes to be connected to each other; Figure 10 schematically shows the combination of Figure 8, with the outer tubes on connected to each other and the inner tubes in the unrolled state; Figure 11 schematically shows the combination of Figure 10, with the inner tubes in inflated and closed state; Figure 12 schematically shows a single T-shaped inner tube in the flat state; Figure 13 schematically shows the T-shaped inner tube of Figure 12 folded shut. condition shows, with airtight connecting seams; Figure 14 schematically shows the T-shaped inner tube of Figure 13 in the coiled state. shows; Figure 15 schematically shows an exploded view of a combination of the first outer tube, an assembly of the second outer tube and the T-shaped inner tube, and a stringing body; Figure 16 schematically shows the combination of Figure 15, with the T-shaped inner- tube in unrolled state; Figure 17 schematically shows an alternative for the connection pattern of the first outer tube of Figure 1, with longer loops in the cord; Figure 18 schematically shows an alternative to the connection pattern of the first outer tube of figure 2, with loops in the cord between the flap sections; Figure 19 schematically shows an exploded view of a combination of the first outer tube of Figure 17 and the assembly of the second outer tube and the inner- tube of figure 15; and Figure 20 illustrates how, via the respective connection patterns, the first outer- the tube and the second outer tube of Figure 19 are connected to each other. The invention is in the field of devices with a inflatable tubing system and is applicable in a manufacturing process of such devices. Figures 1-3 show three variants of a first outer tube 10 for use as part of an inflatable tube system, and figures 4 and 5 show the first variant of the first outer tube 10 in the round state. Figures 6 and 7 show a second outer tube 20 to which the first outer tube 10 must be attached- closed. The second outer tube 20 has an opening 21 in an opening area 22 on a wall thereof, and the first outer tube 10 has an opening 11 in a opening area 12 at one end of it. The first outer tube 10 and the second outer tube 20 serve in particular at their opening areas 12, 22 on to be connected to each other. To this end, the first outer tube 10 is inserted into the opening area 12 provided with a connection pattern 13 with connecting openings 14 and the second outer tube 20 is similarly in the opening area 22 provided with a connection pattern 23 with connection openings 24. Figure 1 shows a first variant of connection pattern 13 of the first outer tube 10. The connection pattern 13 is formed according to this variant by an alternation of parts 16 of a cord 15 which are firmly connected to the first outer tube 10 and loops 17 in the cord 15. The material of the first outer tube 10 is, for example, cloth or tarpaulin, and the cord 15 can be via applicable sewing techniques are secured to the material of the first outer tube 10. Figure 2 shows a second variant of connection pattern 13 of the first outer tube 10. The connection pattern 13 is formed according to this variant by a row of flap sections 18 which are firmly connected to the first outer tube 10, whereby the flap parts 18 are folded over an edge of the opening 11 and a cord 15 has been placed in the flap sections 18. The use of the flap sections 18 can be considered as an alternative to sewing the cord 15 directly onto the material of the first outer tube 10. Parts of the cord 15 that extend between the flap parts 18 Stretches are comparable to the loops 17 in the cord 15 of the first variant of the connection pattern 13. The flap parts 18 can be on any suitable be connected in a manner with the material of the first outer tube 10, for example by sewing or gluing. Figure 3 shows a third variant of connection pattern 13 of the first outer tube 10. The connection pattern 13 is formed according to this variant by a perforated strip 19 which is in any suitable way bonded with the first outer tube 10. Figures 4 and 5 show how the interior of the first outer tube 10 in round state can extend a first inner tube 30. in figures 6 and 7 show how the second outer tube 20 also has a connection pattern. 23 with an alternation of parts 26 of a cord 25 which are firmly connected with the second outer tube 20 and loops 27 in the cord 25 can be provided, and how in the interior of the second outer tube 20 a second inner tube 40 can protrude stretch. The inner tubes 30, 40 are the parts of the inflatable tubular system that must be filled with air for the purpose of shaping the piping system. An important function of the outer pipes 10, 20 is protection of the inner tubes 30, 40 against damage. The inner tubes 30, 40 are in initially in a rolled-up state in the respective outer tubes 10, 20 on- brought and subsequently rolled out. Alternatively, the inner tubes can 30, 40 for example as a plug or precisely as a long hose in the respective outer- Pipes 10, 20 are installed. Figure 8 illustrates how the first outer tube 10 containing the first inner tube 30 is connected to the second outer tube 20 containing the second inner tube 40. Use is made of a stringing body 50 such as a cord that alternating through loops 17, 27 of connection patterns 13, 23 of the outer- tubes 10, 20 are threaded. This presses the first outer tube 10 firmly against the second outer tube 20 is pulled and a robust connection is created between outer tubes 10, 20 obtained without the need for complex actions. Figure 9 illustrates how the stringing body 50 moves through the loops 17, 27 of the connecting- patterns 13, 23 of the outer tubes 10, 20 extends when the outer tubes 10, 20 is connected to each other. Figure 8 also illustrates an optional application of a piece. barrier material 60 of, for example, cloth or tarpaulin at the connection of the outer tubes 10, 20 on top of each other. When a piece of barrier material becomes 60 applied, it is achieved that the interior of the first outer tube becomes 10 sealed off from the interior of the second outer tube 20. Should the first inner- if tube 30 breaks, the second inner tube 40 cannot expand towards the internal of the first outer tube 10, and should the second inner tube 40 break, then the first inner tube 30 cannot expand into the interior of the second outer tube tube 20. Figure 8 shows a variant of the piece of barrier material 60 in which the piece of barrier material 60 is provided with connecting openings 61 in the shape of loops, in a similar way to the outer tubes 10, 20. The barrier piece material 60 is secured between the outer tubes 10, 20 by the threading body 50 not only through the connection openings 14, 24 in the connection patterns 13, 23 on to thread the outer tubes 10, 20, but also through the connecting openings 61 on the piece of barrier material 60. Figures 10 and 11 show the result of connecting the first outer tube 10 and the second outer tube 20 containing the inner tubes 30, 40, where figure 11 the inner tubes 30, 40 in inflated and closed state shows. Figures 12-16 illustrate how, as an alternative to the above-described- application of two inner tubes 30, 40 in the outer tubes 10, 20 a single T-shaped inner tube 35 can be used. Figures 12 and 13 illustrate that this T-shaped inner tube 35 can be manufactured by first forming a flat shape obtain, then fold it closed and in the thus obtained folded shape to achieve airtight connection seams, for example by high frequency welding or melting. The T-shaped inner tube 35 can easily be inserted into the second from the outside. outer tube 20 are installed by passing it through the outside in a rolled-up state to move opening 21 through the second outer tube 20. Next, the T- shaped inner tube 35 in both the second outer tube 20 and the one to be connected thereto first outer tube 10 be rolled out. Other ways of installing the T- shaped outer tube 35 also fall within the scope of the invention. An interesting advantage of using a single inner tube 35 in an appropriate form with respect to the application of two separate inner tubes 30, 40 refers to inflating the inner tube 35. There is no need for this purpose, namely, that air must be supplied to only one side of the inner tube 35. fed, after which the entire inner tube 25 easily fills with air. At a for the use of two separate inner tubes 30, 40 an air connection is required to be installed between the inner tubes 30, 40 when it is desired of a side both inner tubes 30, 40 to be filled with air. In the state of the art, it is known to do that with relatively thin air hoses, for example. Do not clamp 30, 40 separations can be made on the air hoses after inflating the inner tubes. be installed. Not the use of a single inner tube 35 in an application Such complex measures can remain in an appropriate form. Figures 17-20 illustrate a possibility to the stringing body 50 backwards. to omit, namely by the connection pattern 13, 23 of one of the outer- to execute tubes 10, 20 with sufficiently long loops 17, 27. In the examples of figures 17-20, the connection pattern is 13 of the first outer tube 10 of the long loops 17 provided. In accordance with Figure 1, Figure 17 shows how the loops 17 can be obtained from a cord 15 of which parts 16 be firmly connected to the first outer tube 10 and in which loops 17 are left. In accordance with Figure 2, Figure 18 shows how the loops 17 can are obtained on the basis of a cord 15 which is laid in flap sections 18, where the loops 17 are enclosed between the flap parts 18. Figure 19 illustrates the fact that the first outer tube 10 with the connection pattern 13 with the long loops 17 can be combined with the previously shown second outer tube 20, that is to say, the second outer tube 20 with the connection pattern 23 with significantly shorter loops 27. The joining together- making the connection patterns 13, 23 of the outer tubes 10, 20 then becomes done by the long loops 17 of the first outer tube 10 successively by so- indeed a connecting opening 24 of the second outer tube 20 as a long loop 17 which previously through a preceding connection opening 24 of the second outer tube 20 is applied to draw. Figure 20 illustrates how the connection patterns 13, 23 of the outer tubes 10, 20 are interwoven when the outer tubes 10, 20 is connected to each other. It will be clear to an expert that the extent of the out invention is not limited to the examples discussed above, but that various changes and modifications thereof are possible without deviating from the scope of the invention as defined in the attached claims. The possibility described above of applying a single inner tube 35 which passes through at least two interconnected outer- tubes 10, 20 can extend and an appropriate shape such as a T-shape has can be independent of the method of realizing described above a connection of 10, 20 external pipes to each other may be used. The same applies for the possibility of applying a barrier described above between the internal spaces of two outer tubes 10, 20 which otherwise via openings 11, 21 in the outer tubes 10, 20 would be directly connected to each other. In the context of the current text, the concept of cord should be interpreted broadly. interpreted in the sense that the thickness and material of the cord can be freely chosen. Thus, the term also covers variants that in everyday language are more commonly referred to as rope, thread or tape will be indicated. Also, in the context of the current in the text the concept of tent is to be interpreted broadly. In any case, all structures must who have a cloth or tarpaulin that serves to shield people, animals and / or objects to be included therein, where the construction is partially open or can be fully sealable. Thus, the term tent also covers a variant of a tent that in normal usage will rather be referred to as shelter. With regard to the concept of a connection opening, it is noted that this in any case a configuration containing a space that is completely framed by material covers. The invention can be summarized as follows. In the field of inflatable structures becomes a method for connecting external tubes 10, 20 of an inflatable tube system provided. These are outer tubes. 10, 20 which have an opening area 12, 22 containing an opening 11, 21. According to the method, in opening area 12, 22 of each of the outer tubes 10, 20 a connection pattern 13, 23 with a plurality of connection openings 14, 24 are made around the opening 11, 21. Next, the outer- pipes 10, 20 placed against each other at the location of the opening areas 12, 22 and connected to each other by the connection patterns 13, 23 of the outer tubes 10, to fasten 20 together, possibly with the aid of a lacing body 50 that af- alternating through connecting openings 14, 24 of the connection pattern 13, 23 of one outer tube 10, 20 and connection openings 14, 24 of the connection pattern 13, 23 of the other outer tube 10, 20 is threaded.

Claims

1. Device comprising an inflatable tubing system with outer tubes (10, 20) each having an opening area (12, 22) containing an opening (11, 21) and connect to each other at the location of the opening area (12, 22), and each of which in the opening area (12, 22) are provided with a connecting pattern (13, 23) with a multiple of connecting openings (14, 24) around the opening (11, 21), where the connection patterns (13, 23) of the outer tubes (10, 20) are attached to each other made, and where the pipe system furthermore has at least one inner tube (30, 35, 40) includes which extends at least partially through the outer tubes (10, 20).

2. Arrangement according to claim 1, where the inner tube (35) has a shape has that deviates from a simple tubular shape.

3. Arrangement according to claim 2, where the inner tube (35) is T-shaped or X- is shaped.

4. Arrangement according to conclusion 2, where the inner tube (35) a central section comprising at least two branches.

5. Arrangement according to one of claims 1-4, with a stringing body (50) alternating through connecting openings (14, 24) of the connection pattern (13, 23) of one outer tube (10, 20) and connecting openings (14, 24) of the connecting pattern (13, 23) of the other outer tube (10, 20) is threaded.

6. Arrangement in accordance with one of claims 1-5, whereby the connection- pattern (13, 23) of each of the outer tubes (10, 20) a perforated strip (19) includes which is connected to the outer tube (10, 20).

7. Arrangement in accordance with one of claims 1-4, whereby the connection- pattern (13, 23) of one of the outer tubes (10, 20) includes loops (17, 27), and where the loops (17, 27) are arranged sequentially by both a ver- binding opening (14, 24) of the other outer tube (10, 20) as a loop (17, 27) that through an adjacent connection opening (14, 24) of the other outer tube (10, 20) has been applied.

8. Arrangement according to one of claims 1-7, which arrangement a tent, a is a kite, a drone, a piece of furniture, or a support or suspension structure.

9. Method for connecting outer tubes (10, 20) of a inflatable tube system, whereby: - each of the outer tubes (10, 20) an opening area (12, 22) containing an open- ning (11, 21) has, - in the opening area (12, 22) of each of the outer tubes (10, 20) a ver- binding pattern (13, 23) with a multitude of connection openings (14, 24) around the opening (11, 21) is made, and - the outer tubes (10, 20) against each other at the opening areas (12, 22) are placed and connected to each other by the connection patterns (13, 23) to fasten the outer tubes (10, 20) together, and where at least one of the following characteristics applies: - the connection pattern (13, 23) of one of the outer tubes (10, 20) includes loops (17, 27), and the loops (17, 27) are for the purpose of fastening together of the connection patterns (13, 23) of the outer tubes (10, 20) in succession installed through both a connection opening (14, 24) of the other outer tube (10, 20) as a loop (17, 27) that previously through a preceding connection opening (14, 24) of the other outer tube (10, 20) is fitted, and - applying the connection pattern (13, 23) around the opening (11, 21) in the opening area (12, 22) of each of the outer tubes (10, 20) comprises one of a) providing a cord (15, 25), and alternating dividing (16, 26) firmly connect the cord (15, 25) to the outer tube (10, 20) and loop (17, 27) leave in the cord (15, 25), b) provide a cord (15, 25) and a support, alternating parts (16, 26) of the cord (15, 25) securely connect to the support and leave loops (17, 27) in the cord (15, 25), and attaching the carrier to the outer tube (10, 20), c) providing a cord (15) and flap parts (18), a first firmly attach part of the flap sections (18) to the outer tube (10, 20), in a row in the opening area (12, 22) of the outer tube (10, 20), the cord (15) in the row flap- parts (18) lay, and a second part of the flap parts (18) through the opening (11, 21) fold around the cord (15) and secure it to the outer tube (10, 20), and d) provide a cord (15), flap parts (18) and a carrier, a Securely attach the first part of the flap sections (18) to the support, in a row along lay the cord (15) in the row of flap sections (18), a second ge- fold part of the flap parts (18) over the edge of the carrier around the cord (15) connect firmly to the carrier, and attach the carrier to the outer tube (10, 20).

10. Method according to conclusion 9, where when a cord (15) and flap- parts (18) are provided, loops (17) are formed between the flap parts (18) in the cord (15).

11. Method according to conclusion 9 or 10, whereby a barrier on the outside pipes (10, 20) are installed by providing a piece of barrier material (60) and prior to connecting the outer tubes (10, 20) between to place the opening areas (12, 22) of the outer tubes (10, 20).

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