Patent Publication Number: US-11654081-B2

Title: Outdoor furniture

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a United States National Phase Application of International Application PCT/EP2019/073453, filed Sep. 3, 2019, and claims the benefit of priority under 35 U.S.C. § 119 of European Application 18192233.7, filed Sep. 3, 2018, the entire contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The invention relates to outdoor furniture item, in particular with a sun and/or rain protection function, for the garden or beach, such as beach chairs. 
     TECHNICAL BACKGROUND 
     Beach chairs are usually used in the garden or on the beach in the spring and summer months, in order to be able to sit or lie therein in a manner protected from sun and/or the wind. Beach chairs mostly provide two seating spaces which are arranged next to one another on a two-seat bench and whose common back rest can be pivoted in its inclination together with the basket which protects from the sun and/or wind. A calf rest which can be pulled out for a lying function is often located below the seating spaces. 
     Commercial beach chair owners in the autumn and winter months bring in their beach chairs from the beach into dry winter storage at a significant expense with regard to labor, since the demand for beach chairs is low in winter and otherwise the beach chairs would weather on the beach unused during the winter. With regard to the private use of beach chairs in the garden, a tent-like covering is often drawn over the beach chair against weathering in autumn and winter. An ugly tent mass then stands unused in the garden in the autumn and winter months. 
     SUMMARY 
     It is therefore an object of the present disclosure to design an outdoor furniture item, for instance a beach chair, to the extent that it can be usefully used in the autumn and winter months and is protected from the weather. 
     The basic idea of the present disclosure lies in designing an outdoor furniture item, such as for instance beach chair, to be able to be refunctioned as a sauna cabin, a changing cabin, a garden shed and/or as a storage space. 
     According to the present disclosure for technically implementing this idea, an outdoor furniture item is provided with—at least one seating and/or lying unit,—a first shell element,—and a second shell element, wherein the first shell element and/or the second shell element can be selectively rearranged into a first configuration and into a second configuration with respect to the respective other shell element, wherein in the first configuration the first shell element and the second shell element are at least partly nested in one another and in the second configuration the first shell element and the second shell element together enclose an essentially closed inner space, in which the at least one seating and/or lying unit is located. 
     The first configuration can therefore be equated to a beach chair configuration, concerning which a user can use the seating and/or lying unit in the spring or summer, wherein the shell elements which are at least partly nested in one another form a wind protection and/or sun protection to the rear of the user. The second configuration can be equated to a cabin configuration, concerning which the shell elements form a closed inner space which can be used as a sauna cabin, a changing cabin, a garden shed and/or as a storage space. The closed inner space, in which the seating and/or lying unit is located, is protected from rain and weathering by the shell elements. In the second configuration, the interior is preferably effectively thermally closed to a minimal extent, i.e. with a heat transfer coefficient (U-value) of at the most 10 W/(m 2 ·K), preferably below 5 W/(m 2 ·K) to both sides, to the front, to the rear and to the top. The heat transfer coefficient can possibly be greater to the bottom. Deliberate ventilation openings and/or holes or slots which arise from manufacturing tolerances or material distortions do not negate the “essentially closed” inner space, inasmuch as the thermal loss which is due to such is small enough in order to be compensated for example by a sauna heating stove. Herein, what is meant by “can be rearranged” or “rearranged” is a repositionability or a repositioning, wherein the shell elements which are arranged in a manner in which they are releasable from one another are separated from one another and are repositioned on one another again with a changed alignment to one another. A pivotability or a pivoting of the shell elements to one another, concerning which the shell elements remain connected to one another, is not meant here by “rearrangeable” or “rearranged”. 
     One of the shell elements or both can be movable with respect to the respective other shell elements for the conversion of the outdoor furniture item between the two configurations. Depending on the embodiment, it lends itself for preferably only the shell element which is designed in a more lightweight manner to be moved, whilst the heavier shell element remains in place. However, both shell elements can also be moved and can be moved to one another as well as with respect to the overall position and overall alignment of the outdoor furniture item. One of the shell elements or both can preferably be carried or rolled, rotated and rearranged manually by one or two persons by way of handgrips. One of the shell elements or both can be designed as one piece or in a multi-part manner. A one-part design is preferable, in order to increase the stability and to reduce the variety of parts. A multi-part design can be advantageous if a single-part design is too heavy to rearrange. The shell elements are preferably designed in a rigid manner and as stiff in bending as possible. 
     Optionally, in the first configuration, the at least one seating and/or lying unit can be located in the first shell and be orientated towards an open front side of a first shell element. The seating and/or lying unit can then stand on a base of the first shell element. Such a base can be a fixed constituent of the first shell element. 
     The first shell element can therefore be defined as an inner shell element which in the first configuration as a beach chair is at least partly inserted into the second shell element or second shell element is placed onto a rear side of the first shell element. 
     Optionally, the first shell element can define a first semi-space which is open to a front side of the first shell element, and the second shell element can define a second semi-space which is open to the front side of the second shell element. The first shell element and the second shell element herein with regard to shape and size can correspond to one another such that in the first configuration the shell element essentially fills out the second semi-space. The shape of the shell elements can correspond essentially to non-closed polyhedrons or prisms, wherein the shell elements set upon one another in the second configuration can supplement one another into a closed polyhedron or prism. In the first configuration, the surfaces of the rear side, side walls and roof of the second shell element each preferably run essentially parallel to the respective rear side, the side walls and the roof of the first shell element. 
     Optionally, in the second configuration, the first semi-space and the second semi-space together form the essentially closed inner space, wherein the front side of the first shell element and the front side of the second shell element bear on one another in a manner directed to one another. The shell elements placed on one another in the second configuration essentially form the shape of a geometric prism with a preferably essentially mirror-symmetrical pentagon as a base surface which is formed by the side walls of the shell elements. 
     The second semi-space is preferably wider and/or higher than the first semi-space. In the second configuration, such a large size difference is compensated by a panel which runs transversely to the front side, in order in the second configuration to close the inner space at the transition between the shell elements. The panel can preferably form the front side of the first shell element and in the second configuration serves as a stop for the front side of the first shell element. 
     Optionally, the at least one seating and/or lying unit can be movable with respect to the first shell element and/or the second shell element, preferably is insertable or rearrangeable into the first shell element and/or the second shell element as a separate unit. In particular, this makes sense in an embodiment concerning which the second shell element which lies at the outside in the first configuration is designed as lightweight and stable as possible. Given a movable or insertable or rearrangeable (repositionable) seating and/or lying unit, a door can be provided in the heavier first shell element, since in the second configuration the seating and/or lying unit can be pushed into the second shell element. The seating and/or lying unit can possibly be rotated in its alignment by 180° prior to this, so that in the second configuration the viewing direction of a person positioned on the seating and/or lying unit is directed from the inside onto a window in the rear side of the first shell element. A window or a door in the second shell element which is as lightweight and stable as possible is not therefore necessary and such would render the second shell element unnecessarily heavier and more instable. 
     Optionally, the second shell element can comprise a base which is rearrangeable or can be folded over and which in the first configuration bears in a surfaced manner on a rear side and/or side wall of the second shell element and in the second configuration forms a base part of the essentially closed inner space. Herewith, it is particularly simple to place the second shell element from the rear onto the first shell element, for the first configuration. 
     Optionally, the first shell element and/or the second shell element can comprise a door in a side wall. The door can be a pivoting door or a sliding door. The door can open to the inside and/or to the outside, wherein it is preferable for the door to open to the outside. The door is preferably provided in the heavier of the two shell elements which is not moved between the two configurations for the conversion of the outdoor furniture item. Given a seating and/or lying unit which is fixedly installed in the first shell element and which cannot be displaced or repositioned, the door is preferably arranged in the second shell element even if the movement of the second shell element is to be envisaged for the conversion of the outdoor furniture item between the two configurations. 
     Optionally, the outdoor furniture item can comprise a sauna heating stove in the first or second shell element. Herewith, the second configuration can be denoted as a sauna configuration, concerning which the interior which is formed by the shell elements in the second configuration can be heated by way of the sauna heating stove and can serve as a sauna cabin. 
     Optionally, in the first configuration, the at least one seating and/or lying unit can cover the sauna heating stove and in the second configuration can be arranged in the second shell element remotely from the sauna heating stove and directed towards the sauna heating stove. In this embodiment, the seating and/or lying unit is preferably movable or repositionable and the sauna heating stove is fixedly installed in the first shell element. On conversion from the first configuration into the second configuration, the seating and/or lying unit can possibly be rotated in its alignment by 180° and in the second configuration can be pushed away from the sauna heating stove out of the first shell element into the second shell element. In the first configuration, the sauna heating stove which is not required can be hidden and securely stowed in a space-saving manner below or behind the seating and/or lying unit. 
     Optionally, the sauna heating stove can be arranged in a corner region which is formed by a side wall of the first shell element with a rear side of the first shell element, wherein the side wall of the first shell element which lies opposite this side wall comprises a door which preferably opens to the outside. Herewith, the sauna heating oven does not block the entrance region of the door and is as far as possible from the door and from the seating and/or lying unit which is pushed onto the rear side of the second shell element. 
     Optionally, the sauna heating stove can be electrically operated, preferably with 230±23V mains voltage, or with gas, preferably via a propane gas bottle or a gas tank. For an electrical operation via a lead which is fused up to 16 A with a mains voltage of 230±23 V, the sauna heating stove is preferably designed with a heating power of less than 3680 W. Trial tests have resulted that given an inner space volume of about 4 m 3  and a defined wall construction of the shell elements, such a heating power is sufficient, in order to achieve a temperature difference of 100° C. and more between the inner space and the outer temperature and to maintain this. Herewith, the inner space can therefore be used as a sauna in the second configuration. On operation with gas or via an electrical connection which is specially designed for higher powers, greater heating powers can also be possibly achieved. The operation with gas for example is advantageous when no electricity connection is in the proximity and/or high heating powers are necessary, such not being able to be met via a common electricity connection. 
     Optionally, the first shell element and/or the second shell element at a respective rear side can comprise a window of glass and/or of transparent plastic. This on the one hand permits a natural incidence of light in the second configuration given a closed door and on the other hand a view to the outside when in the sauna. Preferably, the window is arranged in the shell element, in which the seating and/or lying unit is not positioned in the second configuration. Given a seating and/or lying unit which is fixedly attached in the first shell element, the window is therefore preferably arranged in the rear side of the second shell element. Given a rearrangeable seating and/or lying unit which in the second configuration is pushed into the second shell element, the window is preferably in the rear side of the first shell element. In order to increase the incidence of light and the possibilities for the positioning of the seating and/or lying unit, both rear sides and/or the roof and/or the side walls can also comprise windows of glass and/or of transparent plastic. 
     Optionally, the first shell element and/or the second shell element can comprise walls with at least two, preferably three solid body layers and at least one metal foil which lies between the solid body layers, reflects radiant heat and preferably serves as a vapor block. Herewith, the loss of radiant heat is reduced and the heating process can be greatly shortened in regard to time, so that the energy consumption is reduced. Furthermore, one can make do without fibre insulation materials which on the one hand are heavier and on the other hand can become moist and thus lose their insulating properties and have a tendency to form mould. Condensation water can run down on the metal foil which preferably also serves as a vapor block and at the lower side can be led to the outside in a controlled manner for evaporation or for dripping away. Optionally, the outdoor furniture item can comprise one (or more) air gaps which lie between the solid body layers. The at least one metal foil can preferably be arranged on a side of one or more of the solid body layers, said side facing the respective air gap. Such a hollow chamber structure as a wall construction of the shell elements has at least one thermally insulating, stagnant air layer which reduces the thermal loss and lowers the required heating power of the sauna heating stove to such an extent that this can be operated electrically with a mains voltage of 230±23 V via a lead which is fused up to 16 A. One or more of the solid body layers preferably consist of wood, in particular the layer which is adjacent to the inner space. One or more of the solid body layers, in particular the outer-lying layer however can comprise another material such as for example plastic and/or fibre composite material. One or more of the solid body layers can for example themselves comprise particularly well thermally insulating material such as artificial cork and/or natural cork. Given an adequate thermal insulation by way of solid body layers, one can make do without a hollow chamber structure with an air gap. 
     Optionally, the first shell element and/or the second shell element can comprise essentially vertically running side walls, a rear side which is inclined to the rear by an angle ß in the range of 3° to 15° and a sloped roof which is inclined to the rear by a roof inclination γ in the range of 5° to 20°. Amongst other things, by way of this an optical impression of a beach chair with a lean-to roof arises in the first configuration and of a garden shed with a gable roof in the second configuration. The rear sides, possibly with windows, are furthermore protected directly to the top from rain. Furthermore, it permits a back rest of the seating and/or lying unit to be set at a deeper lying position, without for this having to increase the distance of the seating surface from the rear side. The sloped roof ensures that rain water runs off to the rear sides. 
     Optionally, the roof inclination γ is larger than the angle ß at which the rear sides are inclined to the rear. This on the one hand provides a harmonic, aesthetically pleasing shape as well as a high stability of the outdoor furniture item in the first as well as in the second configuration. 
     Optionally, a front side of the first shell element can be shouldered in a stepped manner such that a lower section of the front side of the first shell element projects with respect to an upper section of the front side of the first shell element. By way of this, the optical impression of a beach chair is amplified in the first configuration and a placement surface is provided in the first configuration. Optionally, herein a front side of the second shell element can be shouldered in a stepped manner corresponding to the front side of the first shell element such that a lower section of the front side of the second shell element is set back with respect to the upper section of the front side of the second shell element. Herewith, the two shell elements supplement one another in an exactly fitting manner into a closed space in the second configuration. On account of the front sides of the shell elements which are shouldered in a manner corresponding to one another, a horizontal section can be formed in the first front side, on which horizontal section the second shell element lies in the second configuration. By way of this, the stability and the statics of the outdoor furniture item are improved in the second configuration. In the first configuration, the horizontal section contributes to a more beach-chair-like appearance and can serve as a placement surface, for example for drinks or tableware. 
     The invention is hereinafter explained in more detail by way of embodiment examples which are represented in the drawings. The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the drawings: 
         FIG.  1    is a perspective view upon an exemplary first embodiment of the outdoor furniture item which is disclosed herein, in the first configuration; 
         FIG.  2    is a longitudinal sectional view in the xy-plane through an exemplary first embodiment of the outdoor furniture item which is disclosed herein, in the first configuration; 
         FIG.  3    is a perspective view upon an exemplary first embodiment of the outdoor furniture item which is disclosed herein, in the second configuration; 
         FIG.  4    is a longitudinal sectional view in the xz-plane through an exemplary first embodiment of the outdoor furniture item which is disclosed herein, in the first configuration; 
         FIGS.  5  to  10    are perspective views upon an exemplary first embodiment of the outdoor furniture item which is disclosed herein, in different phases of a stepwise conversion from the first configuration into the second configuration; 
         FIG.  11    is a perspective view upon an exemplary second embodiment of the outdoor furniture item which is disclosed herein, in the first configuration; 
         FIG.  12    is a perspective view upon an exemplary second embodiment of the outdoor furniture item which is disclosed herein, in the second configuration; and 
         FIG.  13   a - f    are schematic longitudinal section views in the xz-plane through an exemplary second embodiment of the outdoor furniture item which is disclosed herein, in different phases of a stepwise conversion from the first configuration into the second configuration. 
     
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     Referring to the drawings, an outdoor furniture item  1  is shown in  FIG.  1    in a first configuration, concerning which the outdoor furniture item  1  is optically and functionally similar to a beach chair. For an improved orientation, a right-handed Cartesian coordinate system is shown in the figures in each case, concerning which the x-axis runs in the depth direction, the y-axis in the width direction and the z-axis in the height direction. Here, the x-axis is randomly selected such that it corresponds to a viewing direction upon a front side of the outdoor furniture item  1  in the first configuration. The y-axis here is randomly selected such that given a viewing direction upon the front side of the outdoor furniture item  1  in the first configuration, it runs from the right to the left. From this it results that the z-axis runs vertically from the bottom to the top. The term “front side” or “front” is herein selected for all parts of the outdoor furniture item  1  such that what is meant herewith it is the side or direction which faces or points in the negative x-direction in the first configuration. In a second configuration of the outdoor furniture item  1  however, a “front side” of a movable part can face in the positive x-direction. Analogously, the term “rear side” or “rear” is herein selected for all parts of the outdoor furniture item  1  such that what is meant by this is the side or direction which faces or points in the positive x-direction in the first configuration. In a second configuration of the outdoor furniture item  1  however, a “rear side” of a movable part can face the negative x-direction. 
     The outdoor furniture item  1  comprises a seating and/or lying unit in the form of a two person seating bench  2 , a first shell element  5  and a second shell element  7 . The first shell element  5  forms a first semi-space  9  which is open to the front and in which the two-person seating bench  2  is arranged and which is directed to the front towards the opening in the negative x-direction. The first shell element  5  similarly to a beach chair forms a rain wind and/or sun protection from the rear, from the sides and from above, for a person who is positioned on the two-person seating bench  3 . The second shell element  7  is movable with respect to the first shell element  5  and is placed onto the first shell element  5  in the manner of a hood. The first shell element  5  and the second shell element  7  are therefore nested in one another, wherein the first shell element  5  almost completely fills out a second semi-space  11  which is formed by the second shell element  11  (see  FIG.  4   ). The second shell element is designed as lightweight and stiff in bending as possible, in order to be able to be removed and to be repositioned with respect to the first shell element  5  by one or two persons by hand by way of grips  13 . 
     The longitudinal section in the xz-plane, shown in  FIG.  2   , shows the nesting of the shell elements  5 ,  7  within one another in the first configuration in a clearer manner. The inner-lying first shell element  5  essentially forms a pentahedral polyhedron which is open towards a first front side  14 , with a first sloped roof  15 , a first rear side  17 , a first base  19  and two first side walls  21 ,  23  (not visible in  FIG.  2   , but in  FIGS.  1  and  5   ). The outer-lying second shell element  7  in the first configuration essentially forms a tetrahedral polyhedron which is open to a second front side  24  as well as to the bottom, with a second sloped roof  25 , a second rear side  27  and two second side walls  29 ,  31  (not visible in  FIG.  2   , but in  FIGS.  1  and  5   ). In the first configuration, a second base  33  of the second shell element  7  is folded up or set upright on the second rear side at the inner side, so that in the first configuration it lies between the first rear side  17  and the second rear side  27  essentially parallel to these. 
     The sloped roofs  15 ,  25 , the rear sides  17 ,  27  as well as the side walls  21 ,  23 ,  29 ,  31  each lie parallel to one another in the first configuration. The side walls  21 ,  23 ,  29 ,  31  herein run essentially vertically. The rear sides  17 ,  27  are inclined to the rear by an angle ß in the range of 3° to 15°, preferably by 6°, so that the optical impression of the beach chair is achieved and the rear sides  17 ,  27  are exposed less to the rain. The sloped roofs  15 ,  25  are inclined to the rear by a roof inclination γ in the range of 5° to 20°, preferably by 13° and in the first configuration form a lean-to roof, on which rainwater flows away to the rear. The first front side  14  is shouldered in a stepped manner such that a lower section  41  of the first front side  14  projects with respect to an upper section  43  of the first front side  14 . As can be easily recognized from  FIG.  1   , the second front side  24  in a manner corresponding thereto is shouldered in a stepped manner such that a lower section  45  of the second front side  24  is accordingly set back with respect to an upper section  47  of the second front side  24 . The first front side  14  here is formed by a frame-forming panel  34  which extends perpendicularly to the xz-plane and which to the rear partly covers the view onto the second front side  24 . In the second configuration, the panel  34  serve as a stop for the front side  24  of the first shell element  7  (see  FIGS.  3  and  4   ). Due to the front sides  14 ,  24  of the shell elements  5 ,  7  which are stepped in a manner corresponding to one another, the panel  34  here forms a horizontal section, on which the second shell element  7  lies in the second configuration. By way of this, the stability and the statics of the outdoor furniture item  1  is improved in a second configuration. In the first configuration, the horizontal section of the panel  34  contributes to the beach-chair-like overall appearance and can serve as a placement surface, for example for drinks or tableware. 
     The first rear side  17  comprises a window  35 , which preferably comprises thermally-insulating double or triple glazing. The window  35  can have one or more panes which comprise glass and/or transparent plastic. The window  35  can have a discretion layer for tinting the view, in particular from the outside to the inside. 
     The two-person seating bench  3  in the embodiment according to  FIGS.  1  to  10    stands on the first base  19  and is movably displaceable in the first shell element  5  and can even be taken out (see  FIG.  5   ). A back rest  37  of the two-person seating bench  3 , as is shown in  FIG.  2   , is adjustable in its inclination to the rear in a stepped or continuous manner. Herein, a seating surface  39  of the two-person seating bench  3  can be displaced horizontally to the front (in the negative x-direction) or the complete two-person seating bench  3  can be positioned further to the front in the first shell element  5 , in order to have more space at the rear for the rearward positioning of the back rest  37 . A calf support can be pushed out and folded up at the front on the seating surface  30  of the two-person seating bench  3  for a lying function, said calf leg support possibly projecting out of the first front side  14 . 
     A sauna heating stove  49  which can be electrically operated via a conventional 230V electricity mains connection is arranged below or behind the seating surface  39  of the two-person seating bench  3  in a hidden manner. The sauna heating stove  49  is not envisaged for operation in the first configuration according to  FIGS.  1  and  2   , but is only stowed for the use in the second configuration according to  FIGS.  3  and  4   . Here, the sauna heating stove is arranged in a corner region which is formed by the right first side wall  21  with the first rear side  17 . The left first side wall  23  which lies opposite the right first side wall  21  herein comprises a preferably outwardly opening door  51  (see  FIG.  3   ). 
     In  FIG.  2   , the hollow chamber structure of the second shell element  7  is shown in a detailed section. The first shell element  5  can have the same hollow chamber structure and/or a hollow chamber structure which is shown in  FIG.  4   . Preferably, the sloped roofs  15 ,  25 , the rear sides  17 ,  27  as well as the side walls  21 ,  23 ,  29 ,  31  all comprise a hollow chamber structure according to  FIG.  2    and/or  FIG.  4   . The hollow chamber structure according to  FIG.  2    comprises two wooden layers  52 ,  55  with a stagnant air gap  57  which lies therebetween. A metal foil, preferably comprising aluminum and reflecting radiant heat is arranged on the wooden layers  53 ,  55  towards the air gap  57 . Herewith, the loss or radiant heat is reduced by stagnant air gap  57 , additionally to the thermal insulation, and the heating-up procedure is greatly shortened with regard to time, so that the energy consumption is reduced. Furthermore, one can make do without fibre isolation materials which on the one hand are heavier and on the other hand can become damp and herewith lose their insulating effect and can have a tendency to form mould. The metal foils  59 ,  61  furthermore act as a vapor block, so that condensation water can run down on the metal foils and at the lower side can be led to the outside in a controlled manner for evaporation or for dripping away. Compared to the hollow chamber structure according to  FIG.  4   , the hollow chamber structure according to  FIG.  2    has the advantage that the respective shell element  5 ,  7  can be designed more lightweight and in particular is suitable for the shell elements  5 ,  7  to be repositioned (here the second shell element  7 ). 
     For simplifying the repositioning of the shell elements  5 ,  7 , these here are designed in a rollable manner on rollers  63 ,  65 . The first shell element  5  stands with the first base  29  on four first rollers  63 , and the second shell element  7  stands with the second rear side  27  or the second side walls  29 ,  31  on two second rollers  65 . 
       FIGS.  3  and  4    show the outdoor furniture item  1  in a second configuration, concerning which the outdoor furniture item  1  is optically and functionally similar to a sauna cabin or a garden shed. The first semi-space  9  and the second semi-space  11  in the second configuration together form a closed inner space which can be entered via the door  51 . The first front side  14  and the second front side  24  herein bear on one another in a manner directed to one another. Herein, the second shell element  7  is suspended on the front-side panel  34  of the first shell element  5  by way of holders  66 . The holders  66  comprise a male part on the front side panel  34  of the first shell element  5  in the form of upwardly obliquely tapering hooks. Corresponding to the male part on the front-side panel  34  of the first shell element  5 , the second shell element  7  on the second front side  24  comprises female parts of the holders  66  in the form of downwardly obliquely tapering receivers. The holders  66  can be shaped such that a wedging takes place due to corresponding obliquely tapering surfaces and/or the second shell element  7  is pressed by its intrinsic weight onto the first shell element in the x-direction. A sealing lip (not shown) can run along the second front side, said sealing lip in the first configuration being covered at least partly by the panel  34  and being protected from sun radiation and in the second configuration sealingly bearing on the panel  34  at the front side, in order to thermally seal the inner space which is formed by the shell elements  5 ,  7 , to an improved extent. Such a sealing lip can also serve as an elastic protection cushion, in order to avoid a scratching of the panel  34  by the second front side  24 . 
     The slightly different size of the shell elements  5 ,  7  is compensated by the frame-forming panel  34 . In order for the second shell element  7  to be able to be placed onto the first shell element  5  in the first configuration, the second side walls  29 ,  31  have a greater distance to one another than the first side walls  21 ,  23 . The second semi-space  11  in the y-direction is therefore wider than the first semi-space, so that the formed closed inner space has an offset. By way of the frame-forming panel  34  which extends perpendicularly to the xz-plane, this offset is closed in the second configuration. In the second configuration, the second base  33  is folded down or placed downwards and in the horizontal position supplements the first base  29  into an essentially closed total base of the inner space. 
     In the second configuration, the movable two-person seating bench  3  is now pushed into the second shell element  7  and is directed to the window  35  in the first shell element  5  to the rear (in the x-direction). The alignment of the two-person seating bench  3  can be changed for example by a 180° rotation about a vertical axis (z-axis), after the two-person seating bench  3  has been removed from the shell elements  5 ,  7  (see  FIG.  6   ). Alternatively or additionally to this, the seating and/or lying unit can comprises a back rest which can be repositioned or folded over, so that one can sit on the seating surface the other way round. The seating and/or lying unit then only need to be displaceable between the shell elements and does not need to be completely removed from the shell elements. 
     The sauna heating stove  49  stands at a maximum distance to the two-person seating bench  3  and the door in a corner region of the first shell element  5 . In the second configuration, the sauna heating stove can be operated for taking a sauna. For this reason, an electrical connection  67  for the electrical operation of the sauna heating stove  49  is arranged at the outside on the first rear side  17 . Additionally or alternatively, a gas connection for the connection of a propane gas bottle or another gas tank can be arranged at the location if the sauna heating stove  49  is to be operated with gas. 
     In  FIGS.  3  and  4   , the polyhedral shape contour of the outdoor furniture item  1  in the second configuration becomes clear, this essentially corresponding to the shape of a geometric prism with an essentially (with the exception of the offset which is closed by the panel  34 ) mirror-symmetrical pentagon as a base surface which is formed by the right side walls  21 ,  29  and the left side walls  23 ,  31  of the shell elements  5 ,  7 . By way of the joining-together of the shell elements  5 ,  7 , a garden shed with a gable roof is formed from the beach chair with a lean-to roof. 
     The hollow chamber structure of the first shell element  5  is shown in  FIG.  4    in a detail. The second shell element  7  can have the same hollow chamber structure and/or a hollow chamber structure as shown in  FIG.  2   . Preferably, the sloped roofs  15 ,  25 , the rear sides  17 ,  27  as well as the side walls  21 ,  23 ,  29 ,  31  all comprise a hollow chamber structure according to  FIG.  2    and/or  FIG.  4   . The hollow chamber structure according to  FIG.  4    comprises three wooden layers  53 ,  55 ,  69  with stagnant air gaps  57 ,  71  lying therebetween. A metal foil  59 ,  61 ,  73 ,  75  reflecting radiant heat and preferably comprising aluminum is arranged on the wooden layers  53 ,  55 ,  69  towards the air gaps  57 ,  71 . Herewith, additionally to the thermal insulation by way of the stagnant air gaps  57 ,  71 , the loss of radiant heat is reduced and the heating procedure can be greatly shortened with regard to time, so that the energy consumption is reduced. Furthermore, one can make do without fibre insulating materials which on the one hand are heavier and on the other hand can become damp and herewith lose their insulating effect and can tend to form mould. The metal foils  59 ,  61 ,  73 ,  75  furthermore serve as a vapor block, so that condensation water can run down on the metal foils and at the lower side can be led to the outside in a controlled manner for evaporation or for dripping off Compared to the hollow chamber structure according to  FIG.  2   , the hollow chamber structure according to  FIG.  4    has the advantage that a greater insulating effect is achieved by two air gaps  57 ,  71  and a higher radiant heat reflection by four metal foils  59 ,  61 ,  73 ,  75 , so that the sauna heating stove  49  can be operated with less power. In particular, this hollow chamber structure is suitable for the shell element which tends to be stationary (here the first shell element  5 ). 
       FIGS.  5  to  10    in steps show the conversion of the outdoor furniture item  1  from the first configuration into the second configuration. In  FIG.  5   , the two-person seating bench  3  is pulled out of the first shell element  5 , in  FIG.  6    is rotated about the vertical z-axis by 180° outside the first shell element  5  and hence in  FIG.  7    is inserted back into the first shell element  5 . Herein, the two-person seating bench  3  is not inserted in depth up to the first rear side  17 , but only so deep that the entry region at the door  51  is not blocked from the inside by way of the two-person seating bench  3 . 
     In  FIG.  8   , the second shell element  7  is then removed from the first shell element  5  by way of the grips  13  and according to  FIG.  9    is rotated by 180° about the vertical z-axis and is applied from the front with the second front side  24  onto the first front side  14  which is formed by way of the panel  34 . Prior to this, according to  FIG.  9    the second base  33  was folded or placed downwards, so that horizontally it delimits the second semi-space  11  to the bottom. As is shown in  FIG.  10   , one enters the first semi-space  9  of the closed inner space which is now formed by the shell elements  5 ,  7 , through the door  51  and pushes the two-person seating bench  3  onto the second base  33  onto the second rear side  27 . The outdoor furniture item  1  is then situated in a second configuration. If the steps are carried out in the reverse direction, then the outdoor furniture item  1  can be brought back into the first configuration as a beach chair. 
     In  FIGS.  11  to  13   , a second embodiment of the outdoor furniture item  1  is shown, concerning which the seating and/or lying unit  3  can be fixedly arranged in the first shell element  5 . The door  51  as well as the window  35  here is arranged in the second shell element  7 . The sauna heating stove  49  is also located in the second shell element  7  in this configuration. In order for the sauna heating stove  49  to be able to be accommodated in the second shell element  7  in the nestled first configuration, the second shell element  7  on the second rear side  27  comprises a rearward bulging  77 , in which the sauna heating stove  49  is stowed in the first configuration. In the second configuration (see  FIG.  12   ), the sauna heating stove  49  can be pulled out of the bulging  77  into the interior, in order to operate it as a sauna. Otherwise, the construction of the outdoor furniture item  1  in the second embodiment is very similar to the first embodiment example according to  FIG.  1 - 10   . The second base  33  in the second shell element  7  however in the second embodiment example according to  FIGS.  11 - 13    can be installed in a fixed manner and horizontally delimit the second semi-space  1  to the bottom. This increases the stability of the second shell element  7  since this in theory can be compromised by the door  51  and the window  35 . Additionally to the fixed second base  33 , it is advantageous for the stability to design the second sloped roof  25 , the second rear side  27  as well as the second side walls  29 ,  31  in a more stable manner than in the first embodiment example according to  FIG.  1 - 10   . Herewith however, the second shell element  7  also becomes heavier, so that in the second embodiment example according to  FIGS.  11 - 13    the weight difference between the first shell element  5  and the second shell element  7  can turn out to be smaller. For this reason, for the conversion from the first configuration (see  FIG.  11   ) to the second configuration (see  FIG.  12   ), the first shell element together with the fixedly installed seating and/or lying unit  3  can be pulled out of the second shell element  7 , rotated about a vertical z-axis by 180° and placed with the first front side  14  onto the second front side of the second shell element  7 . The second shell element  7  herein remains stationary. Alternatively to this, the second shell element  7  together with the sauna heating stove  49  can be pulled from the first shell element  5 , rotated 180° about a vertical z-axis and placed with the second front side  24  onto the first front side  14  of the first shell element  5 . The first shell element  5  herein remains in place. 
       FIG.  13   a - f    in schematic sectioned views show the steps-wise conversion from the first summer configuration (see  FIG.  13   a, b   ) into the second winter configuration (see  FIG.  13   e, f   ). The co-ordinate system which is randomly associated with the first shell element  5  here rotates between  FIGS.  13   b  and  13   c   , since the first shell element  5  from  FIG.  13   c    is rotated about the vertical z-axis by 180°. After the first shell element  5  in  FIG.  13   d    has been placed with the first front side  14  onto the second front side  24  of the second shell element  7 , the sauna heating stove  49  is pulled out of the bulging  77  into the inner space which is now formed by the hollow spaces  9 ,  11  of the shell elements  5 ,  7 , in order to operate it in  FIG.  13   e    for a sauna. 
     The numbered indications of the components or movement directions as “first”, “second”, “third” etc. have herein been selected purely randomly so as to differentiate the components or the movement directions amongst one another, and can also be selected in an arbitrarily different manner. Hence these entail no hierarchy of significance. A designation of a component or technical feature as “first” should not be misunderstood to the extent that there must be a second component or technical feature of this type. Moreover, any method steps, inasmuch as not explicitly stated otherwise or not compelling necessary, can be carried out in an arbitrary sequence and/or in a party or completely overlapping manner with regard to time. 
     Equivalent embodiments of the parameters, components or functions which are described herein and which appear to be evident to a person skilled in the art in light of this description are encompassed herein as if they were explicitly described. Accordingly, the scope of the protection of the claims is also to include equivalent embodiments. Features which are indicated as optional, advantageous, preferred, desired or similarly denoted “can”-features are to be understood as optional and as not limiting the protective scope. 
     The described embodiments are to be understood as illustrative examples and do not represent an exhaustive list of possible alternatives. Every feature which has been disclosed within the framework of an embodiment can be used alone or in combination with one or more other features independently of the embodiment, in which the features have been described. Whilst at least one embodiment is described and shown herein, modifications and alternative embodiments which appear to be evident to a person skilled in the art in the light of this description are included by the protective scope of this disclosure. Furthermore the term “comprise” herein is neither to exclude additional further features or method steps, nor does “one” exclude a plurality. 
     While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.