WO2003031747A1

WO2003031747A1 - Thermal insulated wall panel and joint arrangement for the same

Info

Publication number: WO2003031747A1
Application number: PCT/FI2002/000796
Authority: WO
Inventors: Tapio Kordelin
Original assignee: Oy Shippax Ltd
Priority date: 2001-10-12
Filing date: 2002-10-11
Publication date: 2003-04-17

Abstract

The invention comprises a wall structure (10, 101) of a room, a wall joint arrangement, a partition wall structure and a cabin of a ship. The wall structure (10, 101) comprises two or more wall plates (12, 14, 102, 103) which form a front surface of the wall structure (10, 101) intended to be visible. The wall plates (12, 14, 102, 103) forming one planar wall section are tightly joined together with a joint arrangement, where the joints (36, 104) between the wall plates (12, 14, 102, 103) are substantially horizontal. A joint member (16, 106) is located at the joint (36, 104), on the backside of the wall structure (10, 101) and substantially in parallel with the joint, the joint member being arranged substantially tightly against both wall plates (12, 14, 102, 103).

Description

Thermal insulated wall panel and joint arrangement for the same.

The invention relates to a wall structure of a room, to a partition wall, to a wall joint arrangement and to a cabin of a ship, according to the preambles of the independent claims presented below. The invention relates particularly to the wall structures of prefabricated, so called modular rooms.

The walls of ship cabins, hotel rooms and the like are typically made as a combination of a number of different materials. That surface of the wall, which is intended to be visible, is typically made of a suitable plate, for instance a metal sheet coated with PVC plastics. The plate, such as a metal sheet, is generally fitted as vertical panels having edges, which are bent in order to provide stiffness to the thin sheet. Adjacent panels can be fastened to each other, for instance through the bent portions on the vertical edges arranged against each other. In addition the vertical sheets are stiffened by support structures, such as metal pipes or the like, which are generally fastened to the sheets on the backside, for instance by welding. For soundproofing and fire resistance reasons, an insulation layer suitable for the purpose is typically arranged on the backside of the wall panels, whereby the layer is fastened to the wall's support structures of the wall or to the wall plates. The requirements regarding soundproofing and fire resistance regarding cabins and corresponding accommodation structures become successively more stringent.

The stability of the wall structure and a robust fixing of its components to each other is important, particularly when the room, such as a cabin, is made in a so called prefabricated fashion. The walls, inclusive all their structures, are assembled into a finished state already at the factory, or almost the whole cabin is assembled to the finished state outside the final installation location. It is also possible to furnish the cabin or another room to the finished state - beds, tables, cupboards are fastened to the structures in advance. Then the prefabricated cabin or other room is transported with the aid of different arrangements in order to be installed on the final installation location. In a construction method like this the structures will encounter high stresses during transport and installation.

Manufacturing speed and lightweight wall structures are important properties when the rooms are prefabricated in a factory. These requirements could be fulfilled in the present manufacturing processes, which typically include gluing a number of wall structures to each other. Gluing is a rapid and economical way to fasten the wall components to each other. Typically the isolation plates are glued tightly to the back surface of the wall plate. A tight gluing will stiffen the wall structure. The soundproofing properties of the walls will also improve as there are less gaps, which further the conduction of sounds and heat. It is also known to glue the stiffening structures to the wall sheet. However, there are also disadvantages in using glue. For instance, a typical cruising ship requires several tons of glue for the gluing of walls, e.g. 15000 kilograms of glues, typically urethane glues. This amount of glue is a risk, particularly if a fire breaks out, as the generated combustion gases are very toxic and smoky. In addition the use of glues requires effective ventilation at the factory premises.

The patent publication EP 878390 presents a typical panel structure of a cabin wall. There a vertical pipe, to which the bent edge of the adjacent panel is fastened with bolts or the like, is fastened on the backside of the vertical panel, at one of its suitably bent vertical edges. An insulating layer is arranged on the panels, always in the sections between the vertical pipes. Additional stiffness of the structure is obtained by mounting a horizontally corrugated metal sheet on the backside of the wall plate.

Structures like that of the EP 878390 require complicated solutions, such as the mentioned corrugated metal sheet, in order to obtain the required stiffness of the wall structure. The known panel joint solutions are complicated, for instance the bending of the vertical edge of each panel in the manner of EP 878390 is a laborious task. The prior art panel joints form heat and sound bridges through the wall structure, as there is always some space left between the bent edges of the sheets. This reduces the sound insulation and fire resistance. The insulation layer interruptions at the support bars will in addition considerably reduce the sound insulation and the fire resistance. Even a short wall section requires several panels as the available metal sheets generally have a maximum width of about one metre. The more panels are required, the more joints there will be in the wall, which cause installation work and heat and sound bridges.

The object of the present invention is to provide such a wall structure of a room, a partition wall, a wall joint arrangement and a cabin of a ship, that minimises the mentioned problems present in prior art.

An object of the present invention is particularly to provide a wall structure suitable for ship cabins or corresponding rooms, which structure compared to present solutions is more robust, provides better soundproofing, is more fire resistant and easier to install.

An object of the present invention is also particularly to provide a wall structure and a partition wall structure of modularly manufactured rooms, in the making of which it is possible to use essentially little or no glues, and which still fulfils all requirements placed on such walls.

Among other things the above defined objects will be attained by a wall structure of a room, a partition wall, a wall joint arrangement and a cabin of a ship according to the invention and characterised by what is defined in the characterising parts of the independent claims presented below.

Some advantageous embodiments of the invention are described in the dependent claims presented below.

A typical wall structure of a room according to the invention comprises two or more wall plates, which form the front surface of the wall structure intended to be visible. Advantageously the wall plates are fire resistant. The wall plates are joined by a joint arrangement. The wall plates are typically made of thin material, such as plates made of metal sheet. The wall plate is generally coated, for instance with PVC plastics. In some cases the wall plates are bent at their edges so that they form panels, a number of which can be joined to form an entire wall. Support members are arranged on the backside of the wall structure meant to be hidden, on which members the wall plates are supported. The object of the support members is to provide the required stability to the wall structure. A typical wall structure comprises further an insulating material layer, which covers at least the main part of the area of the wall structure. This insulating layer is typically made of a material, which is suitably soundproof and fire resistant. Covers at least the main part of the area means that there may be breaks in the insulating layer, for instance at such points where the support members are fastened to the back surface of the wall plates. Also the edge parts of the wall structure do not necessarily have any insulating layer, if the insulation there is handled in some other manner. In a typical wall structure of a room according to the invention the joints between the wall plates forming one planar wall section are at least substantially horizontal. This means that the planar wall sections are formed by mainly horizontal wall plates. Of course a wall according to the invention can comprise also vertical joints, for instance at a door frame, but in an advantageous wall structure according to the invention the straight wall sections are formed by horizontally arranged wall plates.

A room according to the invention is advantageously an accommodation space on a ship or in a hotel or the like, such as a cabin or a corresponding room. A wall structure according to the invention is also applicable in the manufacturing of walls for other rooms needed on ships, in hotels or the like, such as storerooms. Most advantageously the wall solutions according to the invention are applicable for ship cabins, particularly for prefabricated cabins. Advantageously two wall structures according to the invention are joined into one partition wall for modularly manufactured rooms, either on the installation location or in the factory.

In a ship cabin according to the invention at least one, advantageously all of its planar wall sections are formed by a typical wall structure of a room according to the invention.

Two adjacent wall plates of a substantially planar wall section are joined with a typical wall joint arrangement according to the invention. This arrangement is typically used in a wall structure of a room according to the invention. The joint arrangement comprises a joint member, which fastens the plates to each other on the backside intended to be hidden. According to the invention the joint between the wall plates is arranged mainly horizontally, and the joint member is fastened substantially tightly to both wall plates, for instance by spot welding.

One main advantage of the invention is that it reduces the number of joints required in the wall structure, which reduces the required installation work and the risk of sound bridges through the wall. Compared to previous solutions the wall can be made to better insulate sound and resist fire. For instance, a metal sheet available on the market has a maximum width of slightly over one metre. Already two such plates will provide a sufficiently high wall for a conventional cabin or other room, i.e. there is only one horizontal joint in the middle of the wall. With conventional vertical panels there will usually always be more joints. The small amount of joints makes it also easier to arrange the insulation layer so that it is maximally continuous over the whole wall area.

One advantage of the invention is that it presents easier solutions for the interior design. The horizontal joint is easily arranged at a suitable height, so that for instance a table or light fittings are located at this height, and then their attachments to the support structure of the wall, for instance electrical cabling, is easily arranged through the wall at the joint.

The most important advantages of a wall joint arrangement according to the invention are its tightness and the easy installation. On the backside of the wall plates, which is intended to be hidden, the joint member is arranged to be parallel with the horizontal joint, and it is fastened substantially tightly to both wall plates, for instance with spot welding. Advantageously, the edges of the wall plates to be joined are substantially unbent, which obviates the work required for bending. Particularly advantageously the joint member itself is a substantially unbent plate in parallel with the wall plates. The fastening of such a thin and even plate tightly against the backside of the joint between the thin and even wall plates provides a joint arrangement, which is very thin, but at the same time very tight. On the backside of this joint arrangement it is particularly easy to arrange an unbroken insulation layer. This minimises the risks of heat and sound bridges.

An advantageous embodiment of the invention is typically such that the support members, such as metal pipes on the backside of the vertical planar section of the wall structure are substantially vertical. A wall structure made of horizontal wall plates usually requires additional stability particularly in the vertical direction. The structure according to the invention has of course also horizontal support structures, particularly at the top and bottom edges of the wall.

A particularly advantageous embodiment of the invention is typically such that the insulation layer is substantially unperf orated. The joint arrangement according to the invention provides a better possibility for this than previously. The unperforated arrangement is particularly well obtained, if the couplings between the support members and the wall plates are arranged at least mainly at the edge parts of the wall structure.

An advantageous embodiment of the invention is typically such that the upper wall plate is at least partly bent to form a ceiling part. This bending will further stabilize the structure. In a prefabricated cabin or a corresponding room, furnishings, such as a bed or a cupboard, can be conveniently installed in advance below this ceiling part. This ceiling part can be coated so that it is not necessary to coat it with additional ceiling panels or the like. Thus the area of the actual ceiling is reduced. Advantageously, at the edge of the bent ceiling part there is arranged at least one support member, substantially in parallel with the outer edge of the ceiling part and on its backside, in order to further stabilize the structure.

A wall section formed by a typical wall structure according to the invention is longer in the horizontal direction than in the vertical direction, and its wall plates cover the whole horizontal length of the wall section. The advantages of the wall plates joined by horizontal joints are maximised in a wall of this kind.

An advantageous embodiment of the invention is typical in that the two wall plates joined by at least one horizontal joint are made of coated metal sheet, and coated with different materials. There may be different technical requirements placed on the different coatings on the upper and lower parts of the wall. On the lower wall part it is for instance advisable to have a coating, which can be cleaned in an easier manner than the upper part.

In a typical advantageous wall structure according to the invention a first support structure, typically a bent metal profile is arranged behind the wall plate and substantially in parallel with it. Said first support structure or at least a part of it is typically arranged at a so called first distance from the wall plate, so that an insulating layer or panel can be fastened in a robust manner to the wall structure, between the wall plate and said first support structure. The first distance is most preferably slightly less than the thickness of the used insulating layer, whereby the insulating layer can be fastened by pressing it between the wall plate and the first support structure. Such fastening points for the insulation are arranged along the wall in a sufficient number, advantageously at uniform intervals along the length of the wall. This structure facilitates a very advantageous wall structure according to the invention, which uses no glue or very little glue to fasten the insulating panel. How much smaller the first distance must be compared to the thickness of the insulating layer in order to achieve the required robustness depends on the insulating material and on the size and roughness of the surfaces pressing the insulation at the fastening point. The fact that the insulating layer is pressed between the wall plate and the support structure at the fastening point will not exclude that such a fastening point could include some member or material layer or the like between the wall plate or the insulation and the support structure.

In a very advantageous wall structure according to the invention the first support structure is substantially vertical. Then the structure is simple and easy to realise. The vertical fastening points for the insulation facilitate also the installation of the insulation plates. Most advantageously said first support structure is a metal profile, which is bent along its edges, typically a steel profile. The cross-section of the profile is advantageously hat-like, so that the edges are bent substantially in parallel with the wall plate at a first distance from the wall plate, and so that the central part is arranged substantially in parallel with the wall plate at a second distance from the wall plate.

The first support structure is most advantageously arranged so that said edges are towards the wall plate and that the central part is directed away from the wall plate, whereby the edges of said first support structure press the insulating layer towards the wall plate. In an advantageous wall structure according to the invention said second distance is larger than the first distance, preferably about twice the first distance. This makes it possible to arrange a second insulating layer between the edges of the first support structure, i.e. within the hat. A support structure like this is most advantageously arranged at the vertical joints of the insulating layer, whereby the second insulating layer arranged against the joint minimises the amount of heat and/or sound leaking through the joint.

In a very advantageous application according to the invention a second support structure is fastened to the back surface of the wall plate, advantageously by projection welding, whereby the second support structure is substantially vertical and extends to said first distance from the back surface of the wall plate. The second support structure is fastened to stabilize the structure of the wall plate. If the wall plate has vertical joints a stiffener of this kind could be fastened either at the location of such a joint or between the joints. Most advantageously the second support structure has a form like that of the first support structure, in cross-section a hat-like profile with bent edges. Most advantageously its edges are fastened to the wall plate and the central part is arranged to be substantially in parallel with the wall plate at a first distance from the wall plate. The space left between such a support structure and the wall plate could be filled for instance with insulation material. This is advantageous, particularly if the second support structure is located at a vertical joint of the wall plate. It is possible and advantageous to fasten a second support structure also at a horizontal joint of a horizontal wall structure.

Advantageously said first and second support structures are arranged on top of each other, whereby the making of the wall is further facilitated. Still more advantageously in such a structure the central part of the first support structure is substantially wider than the central part of the second support structure. Then the edges of the insulation layer on both sides of the second support structure are typically placed against the platform formed by the second support structure whereby the first support structure at the same time keeps both edges in their place. Then a second insulation layer is advantageously arranged in the space between the first and second support structures, i.e. typically within the hat of the profile of the first support structure. The second insulation layer extends over a substantial distance above the ends of the first insulation layer, because the central part of the first support structure, i.e. at the same time also the second insulation layer, is wider than the central part of the second support structure. In this way the insulation layer is made tight and at the same time the wall structure is stabilized.

Said substantially vertical first and second support structures, and at the same time thus the fastening points of the insulation layer, are advantageously arranged at substantially uniform distances over the width of the wall. Then the manufacturing of the wall is made still easier, because among other things, then it is possible to use available insulation panels with uniform widths.

The first and second support structures, particularly the substantially vertical support structures according to the invention, will nicely fit together with the horizontal wall panels, and thus they stabilize this wall structure.

To a designer of structures and interiors the wall solution according to the invention provides new possibilities in abundance. For instance different furnishings, laths or lamps may be installed in the horizontal joint. Between two wider wall plates it is possible to place a narrower plate, which may be of a material different from the main wall plates. At the backside of the wall structure at the horizontal joint it is easy to install for instance a casing for cables in parallel with the joint. Cabling outputs are easily arranged at a joint.

The insulation layer of the wall structure according to the invention is advantageously fastened to the wall structure at least substantially without glue, typically no glue is required to fasten the insulation layer. A main object of the invention is thus a wall structure of modularly manufactured rooms, the wall structure comprising at least

- a thin wall plate with a front side intended to be visible,

- an insulation layer fastened firmly to the wall structure on the backside of the wall plate, and - support structures. Said insulation layer is fastened to the wall structure, for instance only by pressing it mechanically, or with some mechanical fastening means, such as with screws or nails.

A particularly advantageous object of the invention is a partition wall structure where two wall structures according to the invention are fastened with fastening members, such as with glue or bolts, to a base, such as to a floor or to the deck of a ship. In a partition wall of this kind the front sides of the wall plates, which are intended to be visible, are directed away from each other. All above defined advantages and alternative solutions are of course applicable to this combination and the wall structure contained in it. A partition wall of this kind can be easily arranged to insulate sound and heat better than previous structures.

The invention is described in more detail below with reference to the enclosed schematic figures, in which

Figure 1 shows schematically a wall structure according to the invention in a cross-section perspective view as seen from the front side, and

Figure 2 shows schematically the wall structure of figure 1 in a cross-section perspective view as seen from the backside;

Figure 3 shows schematically another wall structure according to the invention in a side view;

Figure 4 shows schematically a horizontal cross-section B - B of an installed wall structure according to figure 3;

Figure 5 shows schematically a vertical cross-section C - C of an installed wall structure according to figure 3;

Figure 6 shows schematically a first support structure according to the invention;

Figure 7 shows a cross-section of the first support structure of figure 6;

Figure 8 shows schematically a second support structure according to the invention; and

Figure 9 shows a cross-section of the second support structure according to figure 8. Figures 1 and 2 show a wall structure 10 of a ship cabin according to the invention, which comprises an upper wall plate 12, a lower wall plate 14, a joint plate 16, an insulation layer 18, vertical support beams 20a, 20b, a horizontal support beam 22 of the lower edge, and a horizontal support beam 24 of the upper edge. The upper part of the upper wall plate 12 is bent into a horizontal ceiling part 26, whereby a support structure 24 is arranged on the backside of the edge 28 of the ceiling part. The edge 28 has a bend, against which the ceiling panels 30 are fixed. The upper parts of the support beams 20a, 20b are beiit to extend horizontally above the ceiling part 26. Figure 1 shows also a collapsible bed 32 with a handle 34 installed in the wall structure. In addition a table top 38 is arranged at the horizontal joint 36 between the wall plates 12 and 14.

The plates 12 and 14 have straight edges, which are joined in the horizontal joint 36. During the manufacturing of the wall it is not necessary to bend or otherwise treat the edges of the metal sheets, which shall be joined, but the plates 12 and 14 are placed adjacent each other on the assembly table, and the joint plate 16 is placed over the joint between the two plates. Then the joint plate 16 is welded substantially tightly to both wall plates 12 and 14.

The insulation layer 18 is completely unbroken along the whole area between the beam 22 of the lower edge and the beam 24 of the upper edge. This provides a structure, which very well insulates sound and resists fire. The vertical support beams 22a, 22b and so on are arranged at suitable distances between the beams 22 and 24 on the backside of the insulation layer 18, but they are not fastened to the wall plates 12 and 14 with any support member penetrating through the insulation layer 18. However, in some cases it is possible to penetrate the insulation layer 18, for instance the bed 32 is firmly fastened to the vertical support structures 22 of the wall.

The horizontally bent ceiling part 26 stiffens and stabilises the structure, and furniture, such as the bed 32 and the table top 38, can be installed already when the cabin or its components are prefabricated outside the final installation location. In prefabricated structures the stability is important, as the ready made components of a cabin will be exposed to high stress during transport and installation.

Figure 3 shows schematically and so that it is partly transparent, an advantageous wall structure 101 according to the invention seen from the front side, which is intended to be visible. The visible surface of the wall structure is formed by two horizontal wall plates, i.e. the upper wall plate 102 and the lower wall plate 103, and a horizontal joint 104 between these plates. Figure 3 shows the vertical second stiffening profiles 105, which are projection welded to the wall plates 102 and 103 on their backside, and the plate-like joint plate 106, which is also projection welded over the joint 104. The figure also shows the weld spots 107, which are formed during projection welding. A U-formed profile 120 extends around the wall structure 101 and supports the wall structure 101, and with the aid of this profile the wall structure 101 is fastened in its installation place.

Figure 4 shows the cross-section B - B of figure 3. Figure 4 shows a so called partition wall, whereby its both surfaces are intended to be visible, so that two wall structures 101 are now placed against each other. A hat-like second stiffening profile 105 is welded at its edges 111 to the wall plate 102. Over the second profile there is arranged a first stiffening profile 112 with its edges 113 toward the wall plate 102. The central part 114 of the second stiffening profile and the edges 113 of the first stiffening profile are arranged approximately at the same first distance 115 from the wall plate 102. The central part 118 of the second stiffening profile is located at a second distance 129 from the wall plate 102, whereby the second distance 129 is approximately twice the first distance 115. At rest the first insulation panel 116 is slightly thicker than said first distance 115, and therefore it was necessary to slightly press the end 117 of the insulation panel in order to find room for it between the wall plate 102 and the end 113 of the first stiffening profile. Due to the pressing the panel 116 will now be firmly attached to the wall structure 101, without any glue or other fastening members.

Figure 4 shows that the central part 118 of the first stiffening profile is clearly wider than the central part 114 of the second stiffening profile. The first stiffening profile 112 is filled over its whole central part 118 with a second insulation panel 119. The insulation panels 116 and 119 are interleaved over a distance, as the end 117 of the first insulation is located against the projection of the central part 114 of the second stiffening profile, whereby this distance is sufficiently long to prevent substantial heat or sound bridges from being created through the structure at this point.

In figures 4 and 5 we can see an edge profile 120 having a U-form which extends around the whole wall structure 101 and supports it so that it forms a so called cassette, which is easy to transport as a unit. The space 124 left between the cassettes or the wall structures 101 is called an installation margin. Typically it is 10 to 20 mm.

The cross-section C - C of figure 5 shows how the profile 120 extends around the structures 101 also at their horizontal edges. In the example of figure 5 the sections of the wall structure 101 are fastened tightly together, so that the vertical first stiffening profiles 112 and the first insulation panel 116 together are tightly fitted with their upper and lower edges between the vertical ends 122 and 123 of the U-profile. The location of the central part 118 of the first stiffening profile is drawn to be visible in figure 5, where the central part 118 is arranged tightly against the edge 122, which is left within the profile wall. In order to secure that the wool is firmly attached to the structures it is possible to arrange more support structures behind the wall plate. If the wall structure 101 according to the invention comprises horizontal support structures they are typically arranged between the edges 122 and 123 of the vertical sections of the profile 120. At the horizontal joint (not visible in figure 5) of the wall plates 102 and 103, on the backside of the wall plates, there is schematically shown a joint plate 106, which is projection welded to fit tightly against the back surface of both plates 102 and 103. Advantageously the joint plate 106, with which the wall plates are joined, is made of relatively thin material, approximately as thick as the wall plates.

Figure 5 shows schematically also the fastening of the wall structures 101 to a base 125, which for instance may be the deck of a ship. This fastening can be made for instance by bolts, by gluing or welding, or with some other suitable fastening member.

Figures 6 and 7 show an advantageous first stiffening profile 112 according to the invention. The figures 8 and 9 show a second advantageous stiffening profile 105 according to the invention. Figure 8 shows that the edges 111 of the second stiffening profile are formed by flaps 126. The welding points 107 of the projection welding are drawn as points on the flaps 126. The height 130 of the hat of the first stiffening profile and the height 131 of the hat of the second stiffening profile are approximately as high as the first distance 115. The width

127 of the central part of the first stiffening profile is clearly wider than the width

128 of the central part of the second stiffening profile.

In the following, the exemplary dimensions of the advantageous embodiment example of the invention presented in the figures 3 to 9, are listed by way of example. The height of the wall plates 102 and 103 is 120 to 130 cm, and the height of the whole wall element is about 250 cm. The thickness of one wall structure 101 is about 3 cm, and the thickness of the partition wall shown in figure 102 is typically about 7.5 cm. The vertical stiffening profiles 112 and 105 are arranged at intervals of about 50 cm. The first distance 115 typically equals the thickness of the first insulation panel 116 and the second insulation panel 119, i.e. about 1.5 cm. Advantageously the second distance 129 is then about 3 cm. The width of the central part 127 of the first stiffening profile 112 is typically 11 cm, and its edges 113 are 1.5 cm wide. The width 128 of the central part of the second stiffening profile 105 is typically about 5 cm, and its edges 111 are about 2 cm wide. A wall that is manufactured with the above mentioned dimensions, has been found to meet all requirements regarding fire resistance and sound proofing.

The wall solutions shown in figures 3 to 9 with the first and second support structures are also very advantageous without the additional joint arrangements presented above, and they can be used also with walls comprising vertical joints.

To a person skilled in the art it is obvious that the invention is not limited only to the examples presented above, but the invention may be varied within the scope of the claims presented below.

Claims

1. Wall stracture (10, 101) of a room comprising

- two or more advantageously fire-proof wall plates (12, 14, 102, 103), which form a front surface of the wall stracture (10, 101) intended to be visible, which plates (12, 14, 102, 103) are joined with a joint arrangement (16, 36, 104, 106),

- support members (20, 22, 24, 105, 112, 120) on that side of the wall stracture (10, 101) which is intended to be hidden, on which members the wall plates (12, 14, 102, 103) are supported,

- at least one insulation material layer (18, 116, 119) covering at least the main part of the area of the wall structure (10, 101), whereby the joints (36, 104) between the wall plates (12, 14, 102, 103) forming one planar wall section are at least substantially horizontal, characterised in that at the joint (36, 104) between the wall plates (12, 14, 102, 103) there is a joint member (16, 106) located on the backside of the wall stracture (10, 101) mainly in parallel with the joint, so that the joint member is arranged substantially tightly against both wall plates (12, 14, 102, 103), for instance by spot welding.

2. A stracture according to claim 1, characterised in that the support members (20, 105, 112) on the backside of the vertical, planar section of the wall structure (10, 101) are substantially vertical.

3. A stracture according to claim 1 or 2, characterised in that the insulation material layer (18, 116, 119) is substantially unperf orated.

4. A stracture according to any previous claim, characterised in that the upper wall plate (12) of the wall stracture is at least partly bent into a ceiling part (26).

5. A stracture according to any previous claim, characterised in that the couplings between said support members (20, 22, 24, 112, 120) and wall plates (12, 14, 102, 103) are arranged at least mainly in the edge parts of the wall structure (10, 101).

6. A stracture according to any previous claim, characterised in that the two wall plates (12, 14, 102, 103) joined by at least one horizontal joint (36, 104) are made of coated metal sheet, and coated with materials which differ from each other.

7. A stracture according to claim 1, characterised in that the edges of the wall plates (12, 14, 102, 103) to be joined are substantially unbent.

8. A structure according to claim 1, characterised in that the joint member (16, 106) is a substantially unbent plate in parallel with the wall plates (12, 14, 102, 103).

9. A structure according to any previous claim, characterised in that on the backside of the wall plate (102, 103) and at a first distance (115) from the plate there is arranged a first support structure (112), which is substantially in parallel with the wall plate (102, 103), and that a first insulation layer (116) is arranged firmly to the wall stracture (101) by fastening it (116) between the wall plate (102, 103) and said first support structure (112), whereby the first distance (115) is shorter than the thickness of the first insulation layer (116).

10. A structure according to claim 9, characterised in that the first insulation layer (116) is pressed between the wall plate (102, 103) and the first support stracture (112).

11. A stracture according to claim 9 and 10, characterised in that the first support structure (112) is a profile with bent edges (113), which are arranged substantially in parallel with the wall plate (102, 103) at a first distance (115) from the wall plate (102, 103), and that the central part (118) of the profile is arranged substantially in parallel with the wall plate (102, 103) at a second distance (129) from the wall plate (102, 103).

12. A structure according to any previous claim, characterised in that a second support structure (105) is fastened, advantageously by projection welding, to the back surface of the wall plate (102, 103), whereby the support structure extends to a first distance (115) from the back surface of the wall plate (102, 103).

13. A structure according to claim 12, characterised in that the second support stracture (105) is a profile with bent edges (111), which are fastened to the wall plate (102, 103), and that the central part (114) of the profile is arranged substantially in parallel with the wall plate (102, 103) at a first distance (115) from the wall plate (102, 103).

14. A partition wall stracture of modularly manufactured rooms, characterised in that it comprises two wall structures (10, 101) according to any previous claim, the wall structures being fastened with fastening members to a base (25), so that the front sides of the wall plates (12, 14, 102, 103) intended to be visible are located away from each other.

15. A wall joint arrangement of a room, which arrangement joins two adjacent wall plates (12, 14, 102, 103) of the same substantially planar wall section, the joint (36, 104) between these wall plates (12, 14, 102, 103) being arranged substantially horizontally, characterised in that the joint arrangement comprises a joint member (16, 106) substantially in parallel with the joint (36, 104), which member joins the wall plates (12, 14, 102, 103) on the backside of the plates (12, 14, 102, 103), which is intended to be hidden, and that the joint member (16, 106) is fastened substantially tightly to both wall plates (12, 14, 102, 103), for instance by spot welding.

16. Arrangement according to claim 15, characterised in that the edges of the wall plates (12, 14, 102, 103) to be joined are substantially unbent.

17. Arrangement according to claim 15 or 16, characterised in that the joint member (16, 106) is a substantially unbent plate in parallel with the wall plates

(12, 14, 102, 103).

18. Arrangement according to claim 15 or 16, characterised in that the joint member is a profile with bent edges, which are fastened to the wall plate (12, 14, 102, 103), and that the central part of the profile is arranged substantially in parallel with the wall plate (12, 14, 102, 103) at a first distance (15) from the wall plate (12, 14, 102, 103).

19. Cabin of a ship having at least one, advantageously all planar wall sections made of a wall stracture (10, 101) according to claim 1.