DESCRIPTION

Field of the Invention

The present invention relates to an optimized folding display. The display can be used as a commercial product dispenser and is formed by a folding structure built with sheet material, preferably cardboard, or a similar semiflexible material, which contains or allows housing one or more shelves for displaying the product.

Said display structures are transported in a planar or folded arrangement, and are expanded automatically, semiautomatically or with an easy to assemble system at the point of sale or display.

Displays of this type are widely used at the normal points of sale for product samples or set of product samples with usual product weight ranges of up to 50 kg per shelf, and this range varies depending on the materials used and the possible inner reinforcements to be added.

More particularly, the invention relates to an optimized folding display, comprising: two facing main side panels arranged parallel to each other at a given separation distance from one another, each of said main side panels having a set of first vertical through slots, the first through slots of one of said two main side panels being a symmetrical reflection of the first through slots of the other one of said two main side panels, said first through slots of one of said main side panels facing said corresponding first through slots of the other one of said two main side panels; a cross-member assembly formed by two narrow and elongated rectangular cross members of sheet material divided at least into a central region having the same length as said separation distance of said main side panels, and at least two end regions that can be articulated by means of folding lines; said at least two end regions of each of said cross members correspondingly pass through said first facing through slots of said main side panels, said at least two end regions being folded by bending along said folding lines towards the corresponding outer surface of each of said main side panels; said cross members of said cross-member assembly have their planes separated a given separation distance, such that said cross-member assembly connected to said corresponding outer surfaces of said main side panels form an articulated rhombus which from an expanded position can diagonally be closed into a folded position; and at least one shelf element located between said two main side panels of said display and resting flat on at least two of said cross members, forming a shelf assembly.

State of the Art

Different display systems of the mentioned type are known. They consist of a base structure and a shelf assembly coupled to the structure, intended for bearing weight.

The most complicated part of displays of this type is the folding system for transporting the display in reduced volume state. This feature represents an important convenience and an important logistic advantage, making it a desirable property to achieve. Therefore, great efforts have been carried out in this sense by a number of developers and inventors to achieve implementations and innovations.

Document ES2379334A1 discloses a self-assembling folding display, made from any lightweight semirigid material, preferably cardboard or plastic, for displaying and supporting products intended for sale. The display comprises a body formed by a rear area and two side flaps connected at the front by a lower baseboard. Both in the rear area and at the baseboard there are bellows-like folding lines which are completely straight once the display is unfolded. Furthermore, the display is provided with a plurality of shelves with connecting means for fixing them to one of the sides, leaving the other side supported by gravity in the means provided on the other side. The display can therefore be folded flat with the shelves in it.

Document ES111000511 discloses a folding shelf system obtained from a die cut and bent sheet that has at least three outer bearing walls resulting from bending a single sheet of sheet material along at least two vertical bending lines. The three walls can keep the shelf system upright. A set of shelves from parts of the bearing walls results from the die cutting and bending, the shelves being perpendicular to the bearing walls.

Document ES2293784A1 discloses a display that can be assembled by unfolding consisting of a bottom, sides, aerial shelves, a shelf of the base and an extension piece. The main feature of said display is that it is delivered preassembled with its parts suitably adhered to one another. Assembly is done by means of unfolding, bending and putting its components together. Inversely, it can be folded and packaged to be transported to another location.

Document EP2548477A2 discloses a modular folding stand comprising a panel of multiwall structure made of polypropylene. The stand comprises two vertical folds dividing said first panel into a rear plane, a left side plane and a right-side plane. The side parts are folded up to 180° towards the rear plane. The rear plane comprises a plurality of horizontal slots and the side parts comprise a plurality of holes corresponding with the plurality of slots. Furthermore, a plurality of rods is provided that can be inserted in the holes of the sides. A plurality of shelves comprising a multiwall structure of polypropylene rests on said rods and comprises flaps inserted in the slots of the rear panel.

Document FR2984705A3 discloses a display made from a semirigid material comprising a front panel and a bottom wall connected by two side walls and at least one bearing board. Said display can be folded, where said front part and said bottom wall are arranged against one another.

Although the displays mentioned in the state of the art meet their functional objective, they have not attained the simplification and the performance like that attained by the present invention the features of which are described below. In particular, the displays assembly known in the art are complicated to expand into the working position and cannot hold heavy loads of products to be exhibited. Summary of the invention

The object of the invention is to overcome this drawback. This is achieved by means of an optimized folding display of the type indicated above, characterized in that it each cross member of said cross-member assembly comprises at least one reinforcing flap protruding from the longitudinal side of said central region, said at least one reinforcing flap being connected to said central region by a longitudinal folding line in a foldable manner, such that said reinforcing flap overlaps said central region.

The present invention provides a display with a simplified structure that is particularly focused on achieving a significant reduction in handling times during the process of building said display and additionally that is it capable of supporting heavy loads of products, such as paint cans, drinking bottles or the like. This advantage is fundamental in terms of production cost reductions, and therefore allows classifying it as a highly competitive product against other displays of its kind.

The combination of system elements implicitly and naturally offers a structure for bearing the shelf element that is highly weight resistant with respect to other similar displays built with the same materials.

The invention further includes a number of preferred features that are object of the dependent claims and the utility of which will be highlighted hereinafter in the detailed description of an embodiment of the invention.

Preferably, said cross members of said cross-member assembly are located at a same height, to have a flat supporting surface.

Alternatively, a cross member of said cross-member assembly located at the front of the front of said display when said display is in expanded position, is located at a lower height than the cross member of said cross-member assembly located at the back of said display, to have a supporting surface exhibiting the products to be placed thereon. Preferably, main side panels arranged parallel at a given distance from one another, are made from a rigid sheet material from the group comprising cardboard, a plastic sheet, wood or the like. Also, the elongated rectangular cross members of the cross-member assembly are made of semiflexible sheet material such as from the group comprising cardboard or a plastic sheet.

Optionally, the display comprises fixing means for fixing said at least two end regions contiguous to said central region of said cross members, from the group comprising glue, staples, fasteners, anchors or the like, for keeping each of said at least two end regions flattened and fixed to the outer surface of the corresponding side panel.

According to a preferred embodiment seeking for further increasing the load capacity of the display assembly said at least one reinforcing flap is connected to the central region with fixing means selected from the group consisting of glue, staples, fasteners, anchors or their combinations.

In another embodiment seeking for fast mounting procedure of the display, that is from the folded position into the expanded position, the cross-member assembly comprises at least a pair of diagonally opposed notches on the longitudinal side of the corresponding central region of said at least two cross members and an elastic traction member mounted on said at least a pair of diagonally opposed notches forming an elastic traction system located on the main diagonal of said articulated rhombus, such that said elastic system is able to generate a force when said display is in the folded position that facilitates bringing said display to said expanded position.

Especially preferably, said elastic traction member is an elastic loop and said cross-member assembly comprises two pairs of diagonally opposed notches on the longitudinal side of the corresponding central region of said at least two cross members.

Also, to avoid the need of fixing means for the end regions of the cross members with the main side panels, in the invention the display further comprises: side covers covering said outer surface of said main side panels and said end regions of said cross members, said side covers being connected to said outer surface of said main side panels, overlapping said main side panels.

In another embodiment looking for a more rigid structure of the display said main side panels are connected by a rear panel, said rear panel having the same width as said separation distance of said main side panels, and said main side panels being articulated with said rear panel by vertical connecting lines.

Preferably, in an embodiment seeking to avoid any type of additional fixing means for any of the parts of the display while maintaining an easy assembly method of the display, said main side panels in which said cross members are arranged for receiving said shelf elements, said side covers and said rear panel are formed from a single sheet part having folding lines, such that said two main side panels are located at the lateral ends of said sheet part, said rear panel is located in the centre and said side covers are in the intermediate areas on the corresponding side of said rear panel; and said single sheet part is folded such that said main side panels form the inner walls of the sides of said display, said main side panels being articulated by folding lines, located in the front and connected to said side covers, said side covers being articulated by rear folding lines and connected with said rear panel on both sides; and the upper ends of said through slots are connected by a cutting line, such that an upside-down U-shaped cut remains where pairs of cross members connected at their ends in the form of a rectangular ring through said end regions can be engaged, passing said end regions through said cutting line. In this case, no fixing means are required at all. No glue, staples or similar elements are required, and nevertheless, a heavy-duty foldable display can be achieved.

In another embodiment further reinforcing the structure of the display it is provided that the display comprises at least one front cover for covering the front cross member of said cross-member assembly, said at least one front cover being formed by a narrow and elongated rectangular vertical cover member of sheet material divided at least into a central region having the same length as said separation distance of said main side panels, and at least two ears that can be articulated by means of folding lines each of said main side panels having an L-shaped through slot for receiving said at least two ears, the L-shaped through slot of one of said two main side panels being a symmetrical reflection of the L-shaped through slot of the other one of said two main side panels, said L-shaped through slot of one of said main side panels facing said corresponding L-shaped through slot of the other one of said two main side panels; and said through slots being arranged relative to said first through slots of the front cross member such that when each corresponding ear of said at least two ears is inserted in the corresponding L-shaped through slot, said front cover overlaps said front cross member of said cross-member assembly. In this embodiment, even though the front cross member is hidden by the cover, thanks to the ears inserted in the L-shaped slots, the display assembly can still be folded without problems. The L-shaped through slot leaves a triangular latch as remain that can easily be folded during the insertion of the ears, as it will be explained later.

Preferably, said at least one vertical cover member of said front cover comprises at least one covering flap protruding from the longitudinal side of central region and connected to said central region by a longitudinal folding line about which said covering flap can be tilted from the folding position into the expanded position of said display, such that said covering flap in said expanded position overlaps the longitudinal side of said central region of said front cross member of said cross-member assembly to receive said at least one shelf element. This coupling system has great advantages in terms of speed of assembly and resistance to the weight to be supported. At the same time, it is a system that keeps the articulation with the rest of the with the rest of the elements such that the display can easily be folded from the expanded position into the folded position only by tilting up the covering flap into a vertical position.

Also in another embodiment said at least one shelf element comprises at least one protruding tooth, said protruding tooth protruding from a longitudinal front edge of said at least one shelf element, and said covering flap of said at least one vertical cover member comprises at least one through slot arranged to receive said at least one protruding tooth of said at least one shelf element inserted in said at least one through slot, when said at least one shelf element is mounted resting flat on said cross members assembly. This system allows a perfect coupling between the shelf elements and the covering members, making the shelf elements more stable and preventing the shelf elements to tilt forwards when the weight of the product is displaced to the front part of the display. It also facilitates an improved weight distribution with respect to the front, which now supports a certain fraction of the total weight.

Still in another embodiment said display has a plurality of shelf assemblies at different heights, said shelf assemblies being formed by said shelf element and at least two of said cross members.

Also to achieve a more compact display assembly when folded in the folded position said main side panels have a horizontal cutting line at an intermediate height between said shelves, and said rear panel has a folding line that extends between each of said cutting lines and is aligned with them, forming a lower part and an upper part of said display, said upper part being able to be articulated and bent backwards up to 180° onto said lower part.

Also, to improve the presentation of the products exhibited said at least two cross members bearing said shelf element of the shelf assembly are not located at the same height, resulting in said shelf element still having a specific angle of inclination when it rests on said cross members.

In another embodiment the shelf assemblies of said plurality of shelf assemblies have reduced relative separations and depths according to the height at which they are assembled, giving rise to a display assembly with a stepped configuration.

Preferably, further to said central region and said two contiguous end regions, said cross members comprise two additional end regions, one at each end of said cross members, that can be articulated also by means of folding lines, and where each of said additional end regions of each of said cross members is inserted through a second slot provided in each of said main side panels, again into said main side panels, to form a link, said link being used as holding means for the corresponding cross member. Preferably to simplify the manufacture and assembly of the cross-member assembly, the cross-member assembly is formed from two narrow and elongated rectangular cross members of sheet material made as a single part and divided respectively into two central regions having the same length as said separation distance of said main side panels, and for end regions that can be articulated by means of folding lines.

Finally, in an alternative embodiment said side covers of said main side panels are formed from at least one side prolongation of each of the main side panels themselves, said side prolongations being articulated by vertical folding lines along which they can bend and be folded until covering said at least two end regions of said cross members.

The display can be built without using glues or attachment elements because of a structure of self-consistent assembly, making it the top choice in terms of competitiveness with respect to the displays known in the state of the art.

Brief description of the drawings

Further advantages and features of the invention will become apparent from the following description, in which, without any limiting character, preferred embodiments of the invention are disclosed, with reference to the accompanying drawings in which:

Figure 1 shows a cross member in its most basic form;

Figures 2 and 3 show how a pair of cross members is assembled to the main side panels. Figure 3 furthermore indicates possible fixing means for the end regions, such as glue, staples or others;

Figure 4 shows a cross member with two end regions on each side, which are articulated by folding lines; Figures 5 and 6 show how the cross members with two end regions according to Figure 4 are assembled to the main side panels by means of an additional slot provided in said main side panels;

Figures 7A, 7B and 7C show ways of fixing the end regions of the cross members to the main side panels;

Figures 8A and 8B show a display with a rear panel and how to place a shelf element;

Figures 9A, 9B and 9C show how to fold a display by flattening it diagonally;

Figures 10 and 11 show how to assemble side covers to the display and the final result;

Figures 12A, 12B and 13 show examples of side covers formed from extensions of the main side panels themselves;

Figure 14 depicts a display in which the shelves change in depth depending on the height and it also depicts a shelf element with a certain inclination; an optional bracket has also been included;

Figures 15, 16A and 16B show the possibility of a display with the sides divided by a cutting line, and as a result the assembly can be folded into a twice smaller shape.

Figures 17A and 17B show a display in which the cross-member assembly is formed by pairs of cross members connected at their ends in the form of a rectangular ring and how said rectangular ring fits into pairs of upside-down U-shaped slots provided on the main side panels.

Figures 18A and 18B show a display according to the invention in which the shelf element incorporates fixing flaps. Figure 19 shows an alternative embodiment of the display of Figures 18A and

18B.

Figure 20 shows a flat view of an embodiment of a preferred cross member according to the invention.

Figure 21 shows in a perspective view how the cross member of Figure 20 is assembled into a cross-member assembly.

Figure 22 shows a perspective view of a preferred display according to the invention.

Figures 22 to 26 show perspective views of the mounting procedure of a covering member for covering the cross-member assembly of the display according to the invention.

Figures 27 to 29 show an alternative embodiment of the covering member and the shelf assembly of the display according to the invention.

Detailed description of embodiments of the invention

For the sake of simplicity and clarity, most of the drawings show a diagrammatical form of a display without showing specific minor details, since they are not considered essential.

First, Figure 1 shows a preferred embodiment of the cross-member assembly in its most basic form, showing a central region 4, two end regions 5a and 5b, the folding lines 6a and 6b along which the different regions can be articulated, and optional slots 17 useful in aiding the optional fixing means 11 , 12, 13, 14 for fixing said end regions 5a and 5b are also indicated. In this figure it is also apparent that the cross member 3 of the cross-member assembly comprises, in this case one reinforcing flap 31 protruding from the longitudinal side of the central region 4. This reinforcing flap 31 is connected in a foldable manner to the central region 4 by a longitudinal folding line 33, such that said reinforcing flap 31 in the assembled state of the display overlaps the central region 4. Optionally more than one reinforcing flap could be provided in the cross member 3, such as second flap protruding from the lower longitudinal edge of the cross member 3.

A preferred basic embodiment of the display starts with an assembly such as the one shown in Figures 2 and 3. The cross members 3 are assembled to the main side panels 1 and 2, with their end regions 5a and 5b passing through first slots 9a and 9b provided in the main side panels 1 and 2. Then they are folded along the folding lines 6a and 6b and are finally fixed on the outer surface of the panels by fixing means 11 , 12, 13, 14 intended for that purpose. A basic display is complete once a shelf element 15 is placed, as will be shown in the following drawings.

Figure 4 depicts the embodiment of a cross member 3 with two additional end regions 7a and 7b, and Figures 5 and 6 show how said cross members 3 are assembled to the main side panels 1 and 2 by means of an additional second slot 10a, 10b provided in said main side panels 1 and 2. The two additional end regions 7a and 7b of each side of the cross member s are inserted through the first slot 9a, 9b. Next, they are bent along the folding lines 8a, 8b, 6a and 6b, and finally the additional end regions 7a, 7b are reinserted therein through the second slots 10a, 10b, said assembly being useful as fixing means for said cross members 3 and their end regions.

Figures 7A, 7B and 7C show preferred embodiments of optional fixing means for fixing the end regions 5a, 5b of the cross members 3 to the main side panels 1 and 2. The drawings show a rivet, screw or fastener system 12 in Figure 7A, a projecting tabs system 13 in Figure 7B, and a system in which the end regions 5a and 5b are fused into a single region 14 clasping the corresponding side panel 1 , 2 through the two contiguous first slots 9a. However fixing means as the ones used in these figures are not compulsory for the invention.

In a preferred embodiment schematically shown in Figures 8A and 8B, the display comprises a rear panel 16 connecting the two main side panels 1 and 2. The rear panel 16 is articulated with them through vertical connecting lines. The drawings further show how to place the shelf element 15.

According to another feature of the invention, the described display can be folded from an expanded position until achieving a flattened configuration or folded position. This process is shown in Figures 9A, 9B and 9C. As a result of the parallel configuration of the cross members 3, they can be articulated according to the shape of a rhombus which can diagonally be closed until all the surfaces of the cross members 3 and of the main side panels 1 and 2 are finally coplanar in the folded position.

In another preferred embodiment of the invention depicted in Figures 10 and 11 , further to the cross-member assembly 3 and main side panels 1 and 2, the display comprises side covers 20 fixed against the outer surface of said main side panels 1 and 2, thereby concealing the back faces and the ends 5a and 5b of the cross members 3. In this case, the reinforcing flaps 31 are folded to the inside of the display, as visible in Figure 10.

According to another preferred embodiment of the invention, the side covers 20 are formed from extensions or prolongations 21a, 21 b, 22a, 22b, 26a, 26b of the main side panels 1 and 2 themselves. Figures 12A, 12B and 13 show examples of this embodiment. Figures 12A and 12B show two prolongations 21a, 21b, 22a, 22b having about half of the width of the main side panels 1 and 2 and are articulated along connecting lines with same until being closed on the outer surface, leaving an open central line between both prolongations, whereas in Figure 13 the embodiment consists of a single side prolongation 26a, 26b of each of the main side panels 1 and 2 which folds onto the outer surface of the corresponding panel.

Figure 14 shows another preferred embodiment of a display in which the shelves change in depth depending on the height. Furthermore, the display has shelf elements 15 with a certain inclination, which is achieved by placing the cross members 3 on which each of said shelf elements 15 rests at a different height. An optional bracket 25 has also been included in the same embodiment for advertising purposes. An embodiment based on a display of the type comprising a rear panel 16 like the one described above is also disclosed. Furthermore, the display has a cutting line 23a, 23b, in each of the main side panelsl and 2, located approximately between two shelf assemblies. Both lines are located at the same height, and a folding line 24 in said rear panel 16 extends from a cutting line 23a of one side panel 1 to the cutting line 23b of the other side panel 2. As a result, the display can be articulated and folded backwards, further to being folded into the characteristic rhombus shape of the invention. Correspondingly, the assembly can be folded into a smaller shape with two-fold size reduction. This embodiment is shown in Figures 15, 16A and 16B.

Figures 17A and 17B depict another display according to the invention. In this case, the main side panels 1 , 2, the side covers 20 and the rear panel 16 are formed from a single sheet part 19 having vertical folding lines 28a, 28b, 29a, 29b. The sheet part is preferably rectangular, but it could have other shapes, especially in the upper part, to render the display more appealing.

In this case each cross member 3 of the cross-member assembly comprises a reinforcing flap 31 protruding from the longitudinal side 32 of the central region 4. These reinforcing flaps 31 are connected in a foldable manner to the central region 4 by a longitudinal folding line 33, such that in the mounted state of the display, they overlap the central region 4 of the corresponding cross member 3.

In this display, the two main side panels 1 , 2 are located at the lateral ends of the sheet part 19. In addition, the rear panel 16 is located in the centre and the side covers 20 are in the intermediate areas on either side of the rear panel 16.

This embodiment allows concealing the different panels and technical elements of the display in a simpler manner, and the display can be assembled without requiring additional fixing means. The assembly is therefore folded such that the main side panels 1 , 2 form the inner walls of the sides of the display. As seen in the drawings, the main side panels 1 , 2 are articulated by preferably vertical folding lines 28a, 28b, located in the front and connected to the side covers 20. In turn, the side covers 20 are articulated by rear folding lines 29a, 29b and connected with the rear panel 16 on both sides.

Finally, for the purpose of simplifying the assembly of the shelf assemblies and not requiring external fixing elements, the main side panels 1 , 2 have pairs of slots 9a, 9b the upper ends of which are connected by a cutting line 30, such that an upside-down U-shaped cut remains. Pairs of cross members 3 connected at the ends of the U in the form of a rectangular ring can be engaged through their respective end regions 5a, 5b. To that end, the end regions 5a, 5b are passed through the cut 30a.

Figures 18A and 18B show another embodiment of the folding display according to the invention.

In this case, the display has two main side panels 1 , 2 made from sheet material which, like in the previous embodiment, are provided with pairs of slots 9a, 9b the upper ends of which are connected by a cutting line 30 forming an upside-down U-shaped cut. Furthermore, the main side panels 1 , 2 are connected and articulated with a rear panel 16 by vertical connecting lines.

In addition, the display also has two shelf elements 15 with two side flaps 15a, 15c and a rear flap 15b which are articulated in respective folding lines. These side flaps 15a 15c are inserted in pairs of slots 9a, 9b of the main side panels 1 , 2 which, in the service position of the display, are facing one another and at one and the same height, such that it is possible to dispense with the cross members provided in the other embodiments.

Further to the elements that have already been described, in this embodiment the display also has side covers 20 covering the outer surface of the main side panels 1 , 2 and the two side flaps 15a, 15c of each of the shelf elements 15. To suitably conceal these elements, the side covers 20 are fixed to the outer surface of the main side panels 1 , 2. In this embodiment it is particularly preferable for the main side panels 1 , 2, the main side covers 20 and the rear panel 16 to be formed by a single sheet part 19 having vertical folding lines 28a, 28b, 29a, 29b. In this case, the two main side panels 1 , 2 are located at the lateral ends of the sheet part 19, the rear panel 16 is located in the centre and the side covers 20 are in the intermediate areas on either side of said rear panel 16. Preferably, the sheet part 19 is rectangular. Nevertheless, even though the base must hold on one plane once the display is assembled, the upper end does not necessarily have to be flat. Therefore, this upper end could have other alternative or fanciful shapes.

Figure 19 shows an alternative embodiment with respect to Figures 18A and 18B in which the main side panels 1 , 2 are not parallel. In addition, in this case, the shelf element 15 has two side flaps 15a, 15c but it does not have the rear flap of the previous embodiment.

Like in the case of the other embodiments, the sheet material according to the embodiments of Figures 17 to 19 is a rigid or semirigid sheet material, such as cardboard, plastic, foamboard or equivalents thereof. This sheet material must be rigid enough to hold the weight of the products displayed on the shelves. Furthermore, in those applications in which a panel must be folded, the material must be flexible.

Figures 20 to 21 show a preferred embodiment of the display according to the invention. 1 , like the one shown in Figures 17A and 17B, therefore, reference is made to the previous paragraphs for details not shown in these figures. The optimized folding display comprises again the two facing main side panels 1 , 2 arranged parallel to each other at a given separation distance from one another. These panels are made of a rigid material such as cardboard, plastic, foamboard or equivalents thereof. Each of the main side panels 1 , 2 has a set of first vertical through slots 9a, 9b, the first through slots 9a of one of said two main side panels 1 , 2 being a symmetrical reflection of the first through slots 9b of the other one of the two main side panels 1 , 2. The first through slots 9a, 9b of one of said main side panels 1 , 2 faces the corresponding first through slots 9a, 9b of the other one of said two main side panels 1 , 2. The upper ends of the through slots 9a, 9b are connected by a cutting line 30 such that an upside-down U-shaped cut remains. In this case, the cross-member assembly is formed from two narrow and elongated rectangular cross members 3 of sheet material made as a single part and divided respectively into two central regions 4 having the same length as the separation distance of said main side panels 1 , 2, and for end regions 5a, 5b that can be articulated by means of folding lines 6a, 6b.

In this case, the cross-member assembly is formed from two narrow and elongated rectangular cross members 3 of sheet material made as a single part and divided respectively into two central regions 4 having the same length as said separation distance of said main side panels 1 , 2, and for end regions 5a, 5b that can be articulated by means of folding lines 6a, 6b.

The two end regions 5a, 5b of each of said cross members correspondingly pass through said first facing through slots 9a, 9b connected by a cutting line 30 having an upside-down U-shape of the main side panels 1 , 2. The two end regions 5a, 5b are also folded by bending along the folding lines 6a, 6b towards the corresponding outer surface of each of the main side panels 1 , 2.

The cross members 3 of said cross-member assembly have their planes separated a given separation distance, such that the cross-member assembly 3 connected to the corresponding outer surfaces of the main side panels 1 , 2 form an articulated rhombus which from an expanded position can diagonally be closed into a folded position. Also in this case, a plurality of shelf elements 15 are located between the two main side panels 1 , 2 of said display and resting flat on each cross-member assembly formed by single part cross members 3, forming a shelf assembly.

As it is apparent from figure 20 the single part cross member 3 of the crossmember assembly comprises a reinforcing flap 31 protruding from the longitudinal side 32 of the corresponding central region 4. Each reinforcing flap 31 is connected in a foldable manner to the central region 4 by a longitudinal folding line 33, such that in the assembled position of the display, the reinforcing flap 31 overlaps central region 4. The reinforcing flaps 31 are connected to the corresponding central region 4 with fixing means selected from the group consisting of glue, staples, fasteners, anchors or their combinations.

Furthermore, Figures 20 to 22 show that the cross-member assemblies comprise two pairs of diagonally opposed notches 34 on the longitudinal side 32 of the corresponding central region 4 of the corresponding two cross members 3. Then an elastic traction member 35 is mounted on the at least two pairs of diagonally opposed notches 34 to form an elastic traction system located on the main diagonal of the articulated rhombus. Thanks to this configuration the elastic system can generate a force when the display is in the folded position that facilitates bringing said display to said expanded position.

Regarding the configuration of the rear panel 16 and the side covers 20 reference is made to the description of Figures 17A and 17B.

Differently to previous embodiment, the display of these figures 23 to 26 further comprises a front cover for each cross-member assembly for covering the corresponding front cross member 3 of said cross-member assembly. The front covers are formed by a narrow and elongated rectangular vertical cover member 36 of sheet material divided at least into a central region 37 having the same length as the separation distance of the main side panels 1 , 2, and two ears 38a, 38b that can be articulated by means of folding lines 39a, 39b.

Each the main side panels 1 , 2 further have an L-shaped through slot 40 for receiving the corresponding ears 38a, 38b. The L-shaped through slot 40 of one of the two main side panels 1 , 2 is a symmetrical reflection of the L-shaped through slot 40 of the other one of the two main side panels 1 , 2. This L-shaped through slot 40 of one of the main side panels 1 , 2 faces the corresponding L-shaped through slot 40 of the other one of the two main side panels 1 , 2. From Figures 25 and 26 it is apparent that the through L-shaped slots 40 are arranged relative to the first through slots 9a, 9b of the front cross member 3 such that when each corresponding ear 38a, 38b is inserted in the corresponding L-shaped through slot 40, the front cover overlaps the front cross member 3 of the cross-member assembly, thus hiding in an elegant manner the technical elements of the cross-member assembly.

Furthermore, the vertical cover members 36 of each front cover comprises at one covering flap 41 protruding from the longitudinal side of central region 37 and connected to said central region by a longitudinal folding line 42 about which the covering flap 41 can be tilted from the folding position into the expanded position of the display, such that the covering flap 41 in the expanded position overlaps the longitudinal side 32 of the central region 4 of the front cross member 3 of the cross-member assembly to receive the corresponding shelf element 15.

Finally, Figures 27 to 29 show an improvement on the shelf assembly of the display. In this case, the shelf elements 15 comprise two protruding teeth 44. These protruding teeth 44 protrude from a longitudinal front edge of each shelf element 15. Then the covering flap 41 of each vertical cover member 36 comprises as many through slots 45 as the corresponding shelf element 15 and these through slots 45 are arranged to receive the protruding teeth 44 of the corresponding shelf element 15 inserted in the corresponding through slot 45, when each shelf element 15 is mounted resting flat on the cross members assembly.

Although the invention has been described with respect to preferred embodiments, such embodiments must not be considered to be limiting of the invention which is defined by the broadest interpretation of the following claims.