ES1134033U - Stackable box made of laminar material (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Stackable box made of laminar material, comprising a rectangular bottom wall (1), two opposite end walls (2) and two opposed gualdera walls (3) connected to said bottom wall (1), where said walls of front part (2) and/or said end walls (3) provide upper support surfaces (4) on which the bottom wall (1) of another analogous stackable box situated in an immediately superior position in a stacked situation abuts, characterized in that it also comprises at least one auxiliary stacking element (10) connected to the bottom wall (1) in a position remote from the end walls (2) and the gualdera walls (3), where said auxiliary element stacking (10), which is at least one, has a body that provides an upper auxiliary support surface (12) provided to support the bottom wall (1) of the other analogous stackable box located in the immediately superior position in the situation a piled (Machine-translation by Google Translate, not legally binding)

Description

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DESCRIPTION

STACKABLE BOX MADE OF LAMINARY MATERIAL

Technical field

The present invention concerns a stackable box made of a sheet material, such as for example corrugated cardboard sheet, compact cardboard sheet, corrugated plastic sheet or compact plastic sheet, useful mainly but not exclusively for containing fruit and vegetable products.

The stackable box of the present invention includes one or more auxiliary stacking elements connected to a bottom wall of the box and which in a stacked situation partly support the bottom wall of another analogous stackable box located immediately above avoiding excessive bulging and even the breakage of the back wall due to the weight of the products contained.

Background of the invention

Document ES 1055310 U discloses a stackable box made of a sheet material, such as for example corrugated cardboard sheet, compact cardboard sheet, corrugated plastic sheet or compact plastic sheet, having a rectangular bottom wall, two opposite tester walls connected to the short sides of the back wall, two opposite side walls connected to the long sides of the back wall, and corner columns internally attached to corners formed between the tester walls and the walls of box of the box.

When the stackable box of document ES 1055310 U is arranged in a stacked situation on another analogous box, the corners of the bottom wall of the upper box rest on the corner columns and on portions of the tester walls, with that the weight of one or more similar boxes disposed thereon in a stacked situation is resisted without problem by the corner columns and the portions of the bottom walls of the bottom box.

Document ES 1032550 U discloses a stackable box similar to that of the aforementioned document ES 1055310 U, but provided with roofs parallel to the bottom wall instead of the corner columns. These roofs extend into the interior of the box from upper edges of the front walls, and are connected to the ends of the walls, so as to reinforce the front walls and

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ends of the walls of gualdera and contribute to resist the weight of one or more similar boxes arranged on top in a stacked situation.

However, in both stackable boxes of the aforementioned documents ES 1055310 U and ES 1032550 U, when two or more similar boxes are stacked, the central region of the bottom wall of the upper box is not supported in any way, so The bottom wall of the upper box can bulge down due to the weight of the products contained, and in extreme cases it can break causing the deterioration of the products contained in both boxes.

In addition, the bulging of the bottom wall of the upper box forces to leave a safety space between the maximum level reached by the products inside the lower box and the level of the bottom wall of the upper box, which is determined by the height of the corner columns or by the position of the roofs, in order to avoid that the bottom wall of the upper box, when being bulged, crush the products contained in the lower box. This safety distance implies an increase in the volume occupied by each box, and as a consequence an increase in the volume occupied by a plurality of stacked boxes, which negatively impacts storage and transport costs, and an increase in the amount of sheet material necessary for the formation of each box, which negatively affects the production costs of the box.

Each of the stackable boxes described in the aforementioned documents ES 1055310 U and ES 1032550 U can be obtained from a flat sheet of sheet material, stamped, folded and glued.

Exhibition of the invention

The present invention contributes to solve the above and other inconveniences by providing a stackable box made of sheet material, which comprises a rectangular bottom wall, two opposite front walls and two opposite side walls connected by their bottom edges to said bottom wall. The front walls and / or the gualdera walls provide superior support surfaces on which edges of the bottom wall of another analogous stackable box located in an immediately superior position are supported in a stacked situation.

The stackable box of the present invention further comprises at least one auxiliary stacking element connected to the bottom wall in a position away from the front walls and the slat walls. This stacking auxiliary element, which is at

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minus one, has a body that provides an upper auxiliary support surface intended to support the bottom wall of the other analogous stackable box located in the immediately superior position in the stacked situation.

Preferably, the upper auxiliary support surface provided by the auxiliary stacking element is located at the same level as said upper support surfaces provided by the tester walls and / or by slat walls.

With this construction, a peripheral region of the bottom wall of the stackable box located in an immediately superior position rests on the upper support surfaces provided by the tester walls and / or the slat walls while a middle region of the bottom wall of the stackable box located in the immediately superior position is further supported on the upper auxiliary support surface provided by the auxiliary stacking element.

Thus, a part of the weight of the products contained in the stackable box located in an immediately superior position is transmitted to the walls of the box located in the lower position through the upper support surfaces provided by the tester walls and / or The walls of gualdera while another very significant part of the weight of the products contained in the stackable box located in the upper position is transmitted to the auxiliary stacking element and to the bottom wall of the box located in the lower position through the surface of upper auxiliary support provided by the auxiliary stacking element of the box located in the lower position.

When a plurality of boxes are stacked, the weight is transmitted from top to bottom from one box to the other through its walls and its auxiliary stacking elements without the bottom walls experiencing excessive bulging, and since the box located in the last lower position is well seated on a resistant support surface, the accumulated weight of the products contained in all the boxes is finally transmitted to this resistant support surface by the walls and the auxiliary stacking element of the box located in the last lower position.

The stackable box of the present invention may include a single auxiliary stacking element preferably located in the geometric center of the bottom wall or a plurality of auxiliary stacking elements located in positions regularly distributed along the bottom wall.

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Preferably, the bottom wall, the two tester walls and the two slat walls are part of a flat sheet of a sheet material, such as for example corrugated cardboard sheet, compact cardboard sheet, corrugated plastic sheet or corrugated sheet Compact plastic, die cut, folded and glued. The auxiliary stacking element or each auxiliary stacking element may be made of different materials, among which is the same sheet material from which the box or other similar sheet material is made, or a lightweight solid material such as wood, molded cardboard , an organic material or fibrous plastic, an expanded plastic material, a blow molded plastic, etc.

The auxiliary stacking element may be attached to the bottom wall by adhesive or by another fixing element such as a staple, a nail, a screw or a rivet, or alternatively or additionally the stacking auxiliary element may have a lower projection that It is inserted into a hole in the back wall.

The stackable box of the present invention can also include a tray housed between the front walls and the walls of the board and supported on the bottom wall, this tray being of a known type which is made for example of a plastic or paper sheet very thin and has a plurality of concavities formed to accommodate individual units of the product contained in the stackable box. In accordance with the present invention, the tray includes one or more retention cavities in which part of the one or more auxiliary stacking elements are inserted.

In one embodiment, the retention cavity of the tray is concave and it tightly houses a lower part of the auxiliary stacking element, so that the auxiliary stacking element is retained and positioned relative to the bottom wall by the tray, in in which case no adhesive or other fixing element is used to attach the auxiliary stacking element to the bottom wall. Optionally, the auxiliary stacking element has a lower projection that is housed in a bowl formed in a base wall of the retention cavity and this bowl is in turn inserted into a hole in the bottom wall, which contributes to retaining and better position the auxiliary stacking element relative to the bottom wall of the box.

In another alternative embodiment, the tray retention cavity is convex and therein tightly houses an upper part of the auxiliary stacking element, so that the auxiliary stacking element is also retained and positioned relative to the bottom wall by the tray . However, in this case it can be optionally used

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adhesive or other fixing element for attaching the auxiliary stacking element to the bottom wall.

The stackable box of the present invention may comprise, in addition to the one or more auxiliary stacking elements and in addition to the tray, if necessary, corner columns located in interior corners formed between the tester walls and the walls of gualdera, and / or some roofs that extend from upper edges of the tester walls towards the inside of the stackable box parallel to the bottom wall, and that connect to some ends of the gualdera walls. The corner columns and the roofs also provide superior support surfaces on which the bottom wall of another analogous stackable box rests located in an immediately superior position in a stacked situation.

Both the corner columns and the roofs are known per se and can be part of the same flat die plate from which the box is formed.

Preferably, the stackable box includes anchoring projections that protrude upward from the upper support surfaces provided by the front walls and / or by the gualdera walls and anchor openings formed in the bottom wall, sized and positioned for receive the anchoring projections from another analogous stackable box located in an immediately inferior position in a stacked situation. These anchoring projections and anchoring openings ensure correct alignment of the tester walls, gualdera walls and auxiliary stacking elements of all stackable boxes in the stacked situation.

Brief description of the drawings

The foregoing and other features and advantages will be more fully understood from the following detailed description of some examples of embodiment, which are merely illustrative and not limiting, with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a stackable box made of sheet material according to an embodiment of the present invention;

Fig. 2 is a sectional side view of the stackable box of Fig. 1;

Fig. 3 is a sectional side view of a plurality of stackable boxes such as that of Figs. 1 and 2 in a stacked situation;

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Fig. 4 is a plan view of a stacking auxiliary element usable in the box

stackable of Figs. 1 2 and 3; Fig. 5 is a side elevation view of another auxiliary stacking element usable in the stackable box of Figs. 1 2 and 3;

5 Fig. 6 is a sectional side view of a variant of the embodiment shown in the

Figs. 1 and 2, with an expanded detail; Fig. 7 is a perspective view of a stackable box made of sheet material according to another embodiment of the present invention;

Fig. 8 is a perspective view of a variant of the embodiment shown in Fig. 7;

Fig. 9 is a plan view of the auxiliary stacking element used in the stackable box of Fig. 7; Fig. 10 is a plan view of the auxiliary stacking element used in the box

stackable of Fig. 8; Fig. 11 is a plan view of another auxiliary stacking element usable in the 15 stackable boxes of Figs. 7 and 8;

Fig. 12 is a perspective view of a stackable box made of sheet material according to yet another embodiment of the present invention, including a tray; Fig. 13 is a sectional side view of the stackable box of Fig. 12; Fig. 14 is a sectional side view of a plurality of stackable boxes such as those of the

20 Figs. 12 and 13 in a stacked situation; Fig. 15 is an enlarged detail of Fig. 14; Fig. 16 is an enlarged detail of a sectioned side view of a variant of the

embodiment shown in Figs. 13, 14 and 15; Fig. 17 is an enlarged detail of a sectioned side view of a stackable box made of sheet material according to another additional embodiment of the present invention, including a tray; Y

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Fig. 18 is a partial top plan view of a tray similar to that shown in the embodiment of Figs. 12 and 13 but adapted to the auxiliary stacking element of Fig.

10.

Detailed description of some embodiments

Referring first to Figs. 1 and 2, there is shown a stackable box made of sheet material in accordance with an embodiment of the present invention, which comprises a rectangular bottom wall 1, two opposite walls 2 and two opposite walls 3 connected by its lower edges to the perimeter edges of the bottom wall 1, and roofs 7 extending from upper edges of the tester walls 2 into the stackable box parallel to the bottom wall 1 and which are connected to ends of the walls of gualdera 3.

The bottom wall 1, the two tester walls 2, the two slat walls 3, the roofs 7, and a plurality of additional flaps and tongues, are part of a single flat sheet of die cut sheet material, which is conveniently bent and glued to form the stackable box. The sheet material is selected from corrugated cardboard sheet, compact cardboard sheet, corrugated plastic sheet and compact plastic sheet.

The front walls 2 and the roofs 7 provide upper support surfaces 4 on which the bottom wall 1 of another analogous stackable box located in an immediately superior position in a stacked situation is supported, as shown in Fig. 3.

The stackable box further comprises anchoring projections 18 projecting upwardly from the upper support surfaces 4 provided by the front walls 2 and the roofs 7, and in the bottom wall 1 anchors 19 are formed, which they are sized and positioned to receive the anchoring projections 18 of another analogous stackable box located in an immediately inferior position in the stacked situation (Fig. 3).

The stackable box of Figs. 1 and 2 further comprises auxiliary stacking elements 10, which are attached to the bottom wall 1, for example by means of adhesive or other fixing element (not shown), and located in positions away from the tester walls 2 and of the walls of gualdera 3. More specifically, in this

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embodiment there are three auxiliary stacking elements 10 distributed regularly along a longitudinal central line of the bottom wall 1.

Each stacking auxiliary element 10 has a body that provides an upper auxiliary support surface 12 located at the same level as said upper support surfaces 4 provided by the front walls 2 and the roofs 7, such that the bottom wall 1 of the other analogous stackable box located in the immediately superior position in the stacked situation is further supported on said upper auxiliary support surface 12 of the auxiliary stacking element 10, as shown in Fig. 3.

The body of the auxiliary stacking element 10 of Figs. 1 and 2 has a solid cylindrical shape, although alternatively it could have another solid or tubular shape, and in any case it is elongated in a direction perpendicular to the bottom wall 1, and is made of a solid and lightweight material such as wood, cardboard molded, injection molded plastic, blow molded plastic, an organic material or fibrous plastic, or an expanded plastic material, among others.

Figs. 4 and 5 show other possible embodiments of the auxiliary stacking element 10 usable in the stackable box of Figs. 1 and 2.

The body of the stacking auxiliary element 10 of Fig. 4 is made of a spiral wound sheet material according to a generatrix perpendicular to the bottom wall 1. The sheet material used for the stacking auxiliary element 10 of Fig. 4 can be the same sheet material used for the die-cut flat plate from which the stackable box is obtained, or other similar sheet material.

The body of the auxiliary stacking element 10 of Fig. 5 has a column shape with a base 15, a capital 16 which provides the upper auxiliary support surface 12, and a shaft 11 extending between said base 15 and said capital 16, said shaft 11 being thinner than base 15 and the capital. The sheet material used for the stacking auxiliary element 10 of Fig. 5 can be a lightweight solid material such as wood, molded cardboard, injection molded plastic, blow molded plastic, an organic material or fibrous plastic, or a plastic material expanded.

Fig. 6 shows a stackable box according to a variant of the embodiment shown in Figs. 1 and 2, which only differs from it in the fastening of the auxiliary stacking element 10 to the bottom wall 1. As the enlarged detail of Fig. 6 best shows, in this variant the body of the auxiliary stacking element 10 has a lower ledge

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13 which is inserted into a hole 5 formed in the bottom wall 1. By suitably sizing the lower projection 13 and hole 5, an appropriate interference fit can be provided to ensure retention of the stacking auxiliary element 10 in the bottom wall. However, this configuration, with or without interference adjustment, can be complemented, for example, by an adhesive bond.

Figs. 7 and 8 show two variants of another embodiment of the stackable box of the present invention. In both cases, the stackable box is constituted one in an identical manner to that described in relation to Figs. 1 and 2 and only differ from it in the configuration of the auxiliary stacking elements 10. In Figs. 7 and 8, the body of each of the auxiliary stacking elements 10 is made of a sheet material, which can be equal to or similar to the sheet material from which the box is made, and comprises two or more flat sections forming an angle between yes connected by a fold line 14 perpendicular to the bottom wall 1.

The stackable box of Fig. 7 comprises a single auxiliary stacking element 10 attached to the bottom wall 1, for example by means of adhesive or other fixing element, and located in the geometric center of the bottom wall 1. The body of This auxiliary stacking element 10, as best shown in Fig. 9, comprises two pieces 26, 27 made of said sheet material and having central flat sections 26a, 27a attached and joined together, for example by adhesive or stapling, and extreme flat sections 26b, 27b perpendicular to the respective central flat sections 26a, 27a and connected thereto by the corresponding bending lines 14 perpendicular to the bottom wall 1. The extreme flat sections 26b, 27b of both pieces 26, 27 extend in opposite directions.

The stackable box of Fig. 8 comprises two auxiliary stacking elements 10 attached to the bottom wall 1, for example by adhesive or other fixing element, and located on a longitudinal centerline of the bottom wall 1. The body of each of these auxiliary stacking elements 10, as best shown in Fig. 10, comprises two pieces 28, 29 made of said sheet material and having central flat sections 28a, 29a attached and joined together, for example by adhesive or stapling, and oblique flat sections 28b, 29b with respect to the respective central flat sections 28a, 29a and connected thereto by the corresponding bending lines 14 perpendicular to the bottom wall 1. The extreme flat sections 28b, 29b of both pieces 28, 29 extend in divergent directions.

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Figs. 9 and 10 show the auxiliary stacking elements 10 used in the stackable boxes of Figs. 7 and 8, respectively.

Fig. 10 shows another variant of the auxiliary stacking element 10 usable in the stackable boxes of Figs. 7 and 8, which has a body formed by a single piece 30 made of the aforementioned sheet material, and comprising four flat sections 30a, 30b, 30c, 30d connected in series by bending lines 14 perpendicular to the bottom wall 1 of the stackable box. The first flat section 30a and the last flat section 30d are attached and attached to each other, for example by means of adhesive or stapling, so that the stacking auxiliary element 10 of Fig. 11 has a triangular cross-sectional profile.

Other variants of the auxiliary stacking elements 10 of Figs will readily occur to one skilled in the art. 4, 5, 9, 10 and 11 without departing from the scope of the present invention.

Referring now to Figs. 12 and 13, there is shown a stackable box made of sheet material in accordance with another embodiment of the present invention, which comprises a rectangular bottom wall 1, two opposite walls 2 and two opposite walls 3 connected by its lower edges to the perimeter edges of the bottom wall 1, and corner columns 6 arranged in interior corners formed between the front walls 2 and the walls of the roof 3.

The bottom wall 1, the two tester walls 2, the two wall walls 3, the corner columns 6, and a plurality of additional flaps and tongues, are part of a single flat sheet of die cut sheet material, which is conveniently folded and glued to form the stackable box. The sheet material is selected from corrugated cardboard sheet, compact cardboard sheet, corrugated plastic sheet and compact plastic sheet.

The front walls 2 and the corner columns 6 provide upper support surfaces 4 on which the bottom wall 1 of another analogous stackable box located in an immediately superior position in a stacked situation rests, as shown in Fig. 14.

The stackable box further comprises anchoring projections 18 projecting upwardly from the upper support surfaces 4 provided by the front walls 2 and the corner columns, and on the bottom wall 1 are formed some

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anchor openings (not shown), which are sized and positioned to receive the anchoring projections 18 of another analogous stackable box located in an immediately lower position in the stacked situation.

The stackable box shown in Figs. 12 and 13 further includes a tray 20 housed between the tester walls 2 and the slat walls 3 and resting on the bottom wall 1. This tray 20 is preferably made of a thin sheet of a plastic material and has a plurality of concavities 21 provided to accommodate individual units of a product contained in the stackable box, such as individual units P of a fruit and vegetable product. The tray 20 also has a concave retention cavity 22 in which a lower part of an auxiliary stacking element 10 is inserted, which is analogous, for example, to that described above in relation to Figs. 1 and 2.

Fig. 15 shows in greater detail the retention cavity 22 of the tray 20, which has a base wall 23 that rests on the bottom wall 1 of the stackable box, and the auxiliary stacking element 10 has a surface of lower support 17 that rests on said base wall 23 of the retention cavity 22. Thus, the loads applied on the upper auxiliary support surface 12 of the stacking auxiliary element 10 by the bottom wall 1 of the stackable box located in the upper position in the stacked situation are transmitted by the stacking auxiliary element 10 to the bottom wall 1 of the stackable box located in the lower position through the base wall 23 of the retention cavity 22.

Fig. 16 shows a variant of the fastening system of the auxiliary stacking element 10 with respect to the bottom wall 1 of the stackable box, which differs only from that described above in relation to Fig. 15 in that the auxiliary stacking element 10 has a lower projection 13 that is housed in a bowl 24 formed in the base wall 23 of the retention cavity 22 and this bowl 24 is inserted together with the lower projection 13 in a hole 5 formed in the bottom wall 1 of The stackable box. In the embodiments shown in Figs. 15 and 16, the stacking auxiliary element 10 is not attached to the bottom wall 1 by means of adhesive or other fixing element.

Fig. 17 shows an alternative embodiment of the fastening system of the stacking auxiliary element 10 with respect to the bottom wall 1 of the stackable box, which differs from that described above in relation to Fig. 15 in that the retention cavity 22 of the tray 20 is convex and houses an upper part of the auxiliary stacking element 10. The retention cavity 22 has an upper wall 25 that rests on the surface of

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upper support 12 of the auxiliary stacking element 10. In turn, the auxiliary stacking element 10 has a lower support surface 17 that rests on the bottom wall 1 of the stackable box. Thus, the loads applied by the bottom wall 1 of the stackable box located in the upper position in the stacked situation are transmitted through

5 the upper wall 25 of the retention cavity 22 to the auxiliary stacking element 10 and to the bottom wall 1 of the stackable box located in the lower position.

Fig. 18 shows another variant of the fastening system of the auxiliary stacking element 10 to the bottom wall 1 of the stackable box, where that of the auxiliary stacking element 10 is similar to that described above in relation to Figs. 8 and 10, and where the retention cavity 22 of the tray 20 is configured to receive tightly a lower part of this auxiliary stacking element 10, and is located between the concavities 21 so that virtually no space is left for the units of the product contained in the stackable box. Obviously, variations in the configuration of the auxiliary stacking element 10 and the concavities 21 of the material will easily occur to one skilled in the art.

15 tray without going beyond the scope of the present invention.

It should also be noted that the stackable box made of sheet material of the present invention contemplates alternative embodiments (not shown) in which the one or more auxiliary stacking elements 10 are combined with corner columns instead of roofs, or with absence of roofs and corner columns, or in which tray 20

20 associated with one or more auxiliary stacking elements 10 is combined with roofs instead of corner columns, or with absence of roofs and corner columns.

The scope of the present invention is defined in the appended claims.

Claims (17)

U201431418 10-31-2014 1.- Stackable box made of sheet material, comprising a rectangular bottom wall (1), two opposite wall walls (2) and two opposite wall walls (3) connected to said bottom wall (1), where said walls of tester (2) and / or said wrought iron walls (3) provide upper support surfaces (4) on which the bottom wall (1) of another analogous stackable box located in an immediately superior position is supported in a situation stacked, characterized in that it further comprises at least one auxiliary stacking element (10) connected to the bottom wall (1) in a position away from the tester walls (2) and the gualdera walls (3), where said auxiliary stacking element (10), which is at least one, has a body that provides a support surface upper auxiliary (12) provided to support the bottom wall (1) of the other analogous stackable box located in the immediately superior position in the stacked situation. 2. Stackable box made of sheet material according to claim 1, characterized in that said upper auxiliary support surface (12) provided by the auxiliary stacking element (10) is located at the same level as said upper support surfaces (4) provided by the walls of testero (2) and / or walls of gualdera (3). 3. Stackable box made of sheet material according to claim 1 or 2, characterized in that said body of the stacking auxiliary element (10) is made of a spiral wound sheet material according to a generatrix perpendicular to the bottom wall (1) . 4. Stackable box made of sheet material according to claim 1 or 2, characterized in that said body of the stacking auxiliary element (10) is made of a sheet material and comprises at least two flat sections forming an angle to each other connected by a fold line (14) perpendicular to the bottom wall (1). 5. Stackable box made of sheet material according to claim 1 or 2, characterized in that said body of the auxiliary stacking element (10) is solid or tubular and has an elongated shape in a direction perpendicular to the bottom wall (1) . 6. Stackable box made of sheet material according to claim 1 or 2, characterized in that said body of the stacking auxiliary element (10) has a column shape with a base (15), a capital (16) that provides the surface of upper auxiliary support (12), and a shaft (11) extending between said base (15) and said capital (16), said shaft being (11) thinner than the base (15) and the capital. 14 U201431418 10-31-2014 7. Stackable box made of sheet material according to any one of the preceding claims, characterized in that the auxiliary stacking element (10) is attached to the bottom wall (1) by means of adhesive or other fixing element. 8. Stackable box made of sheet material according to any one of the preceding claims, characterized in that the auxiliary stacking element (10) has a lower projection (13) that is inserted into a hole (5) of the bottom wall ( one). 9. Stackable box made of laminar material according to any one of claims 1 to 6, characterized in that it also comprises a tray (20) housed between the front walls (2) and the slat walls (3) and resting on the wall bottom (1), wherein said tray (20) has formed a plurality of concavities (21) provided to accommodate individual units of a product contained in the stackable box and at least one retention cavity (22) in which it is inserted into the less part of the auxiliary stacking element (10), which is at least one. 10. Stackable box made of sheet material according to claim 9, characterized in that said retention cavity (22) is concave and houses a lower part of the auxiliary stacking element (10), and the auxiliary stacking element (10) has a lower support surface (17) that rests on a base wall (23) of the retention cavity (22), which in turn rests on the bottom wall (1) of the stackable box. 11. Stackable box made of sheet material according to claim 10, characterized in that the auxiliary stacking element (10) has a lower projection (13) that is housed in a bowl (24) formed in said base wall (23) of the retention cavity (22) and said bowl (24) is inserted into a hole (5) of the bottom wall (1). 12. Stackable box made of sheet material according to claim 9, characterized in that said retention cavity (22) is convex and houses an upper part of the auxiliary stacking element (10), and the auxiliary stacking element (10) has a lower support surface (17) that rests on the bottom wall (1) of the stackable box. 13. Stackable box made of sheet material according to claim 12, characterized in that the auxiliary stacking element (10) is attached to the bottom wall (1) by means of adhesive or other fixing element. 14. Stackable box made of sheet material according to claim 12, characterized in that the auxiliary stacking element (10) has a lower projection (13) that is inserted into a hole (5) of the bottom wall (1). fifteen U201431418 10-31-2014 15.- Stackable box made of sheet material according to any one of the preceding claims, characterized in that it also comprises corner columns (6) in interior corners formed between the front walls (2) and the wall walls (3). 16.- Stackable box made of sheet material according to any one of the claims 5, characterized in that it also comprises roofs (7) that extend from upper edges of the tester walls (2) into the stackable box parallel to the bottom wall (1). 17. Stackable box made of sheet material according to any one of the preceding claims, characterized by further comprising anchoring projections (18) that 10 protrude upwards from the upper support surfaces (4) provided by the tester walls (2) and / or slat walls (3) and anchor openings (19) formed in the bottom wall (1) sized and positioned to receive said anchoring projections (18) from another analogous stackable box located in an immediately lower position in a stacked situation. 18. Stackable box made of sheet material according to any one of the preceding claims, characterized in that the bottom wall (1), the two tester walls (2) and the two slat walls (3) are part of a flat sheet of laminar material, die cut, folded and glued. 16