JP2017532260A - Packing box with stacking protrusion cutout and set of cutouts for making such a box - Google Patents

Abstract

The present invention includes side walls (2, 2 ', 3, 3'; 45, 47; 57, 59) and a bottom surface (4; 46; 58), and includes at least one side wall (3, 3 '; 45, Cutout or cutout to form a box and a box made of corrugated board, 47) comprising at least one stacking protrusion (7) and the bottom face (4; 46; 58) with a corresponding recess (8) Related to the set. Each protrusion (7) has a substantially right trapezoidal shape including one inclined side (15) with a straight opposite side (16) at least at the bottom, and each corresponding recess (8) is A rectangular first region (21) cut from the bottom (4) of the box and adjacent triangles cut from adjacent side walls (2, 2 ', 3, 3'; 45, 47; 57, 59). (21) formed in the second region (24), the bottom surface (4; 46; 58) and the adjacent side walls (2, 2 ', 3, 3'; 45, 47; 57, 59) being rectangular And the region (29) that meets at the end of the (24) recessed region of the triangle forms a corner of the triangle that is crushed at an angle with respect to the bottom surface (4; 46; 58), and the protrusion of the lower box ( 7) Form a guide ramp for nesting or extrusion.

Description

  The present invention relates to a packaging box made of corrugated paper comprising a side wall and a bottom surface, wherein at least one side wall is provided with at least one protrusion for stacking and the bottom surface is provided with a corresponding recess.

  The invention also relates to a cutout or set of cutouts to form such a box.

  The present invention is of particular importance, although not only in the field of boxes that can be stacked on each other on a pallet, with stacking protrusions, and in particular requiring several processing operations during the unloading stage from the pallet. Application is found.

  A mortise / mortise-type box stacking system designed to allow vertical and rectangular protrusions (tenons) to cooperate with corresponding recesses having a complementary rectangular shape to allow skidding Already known.

  While such systems certainly do lock well together, for the same reason they are difficult to remove when trying to lower the box from one side. They are also fragile and cannot withstand repeated handling tasks.

  The packaging is also made of a flap, which is shaped to complement the shape of the notch formed on the bottom part, which is also formed of a flap, allowing connection and hence lateral locking It is known (FR-A-2 311 717).

  In addition to the fact that such an aspect determines a blank shape with two sets of flaps, it is not suitable for low basis weight boards and due to inconsistencies that can occur when creating boxes, It cannot always be stacked vertically.

  For example, a box having a cover with a tab that engages the side wall by folding around a fold line between the wall and the flap and is glued to the upper surface thereof is also known.

  Such a box allows good centering and locks together firmly and firmly, while its design generally leads to weakening of the walls and each other against overturning due to excessive lateral forces. It may prove that the lock is insufficient.

  The present invention alleviates these disadvantages, and in order to do so, a solution that allows the box protrusions to be easily guided and released, especially while it is being unloaded from one side of the stack, among others. Proposed measures and attempt to provide a set of boxes, cutouts and cutouts that meet the requirements of practical experience better than previously known in that they do so without the risk of breaking the sides of the box held by the operator To do.

  Thus, the present invention facilitates the loading and unloading of particularly low basis weight corrugated paper trays, and at the same time holds the boxes in contact with each other while on the pallet and maintains excellent lateral locking. .

  The present invention also allows for easy and inexpensive production of boxes and is not limited to boxes with lids and is particularly advantageous for trays.

Therefore, according to the present invention, when packing materials are stacked on top of each other and placed on a pallet, slipping of the packing materials can be avoided and a light basis weight (less than 150 g / m ² ) can be used. While at the same time allowing for excellent release and unlocking of the packing material with respect to each other without the risk of damaging them.

  The box configuration also allows an optimized transmission of the weight load of the upper box to the lower box, thereby allowing for excellent centering of the walls when aligned vertically to each other To do.

  To this end, the present invention is especially a packaging box made of cardboard including side walls and a bottom surface, wherein at least one side wall comprises at least one stacking projection and the bottom surface comprises a corresponding recess. Propose. The packaging box is characterized in that each protrusion has a substantially right trapezoidal shape including one inclined side and at least another side that is straight at the bottom. The packaging box is characterized in that each corresponding recess is formed by a rectangular first region recessed at the bottom of the box and an adjacent triangular second region recessed at an adjacent side wall. The junction region where the bottom surface and the adjacent side wall meet at the end of the rectangular and triangular recessed region forms a corner of a crushed triangle that forms an angle with the bottom surface, and the protrusion of the lower box It constitutes a guide slope for connecting or pushing protrusions.

  An adjacent triangular area refers to a recessed area that is adjacent to the rectangular recessed first area and is in its lateral extension (on the adjacent wall).

In some advantageous embodiments, one and / or another of the following arrangements are additionally and / or additionally:
The first region of the recessed rectangle is opposite to and perpendicular to the straight side of the protrusion (when the box is created) and on the straight side of the upper box protrusion (at least in the bottom portion) A) defining a range of one side of a recessed triangular region that forms an angle with a first side edge that abuts and a bottom face and forms a corner of a crushed triangle on an adjacent sidewall; The corners of the crushed triangle including the two sides are designed to abut the inclined sides of the lower box projection. A side that forms an angle with respect to the bottom surface means that, in particular, the side edge is inscribed in a plane that forms an angle with the bottom surface.
The box comprises a bottom surface and at least four side walls, two opposing walls connected to the bottom surface by a first fold line on one side and an upper end on the other side; The upper end includes at least one of the protrusions. The lower end of the bottom surface and the lower end of the adjacent side wall are provided with at least one of the corresponding recesses that are in line with the protrusion and can cooperate therewith. Each protrusion is aligned with and / or coincides with the upper end of the corresponding side wall to form a predetermined first length long base and a predetermined angle with respect to the end to form an inclined side Chamfered toward the inside of the protrusion to form a straight opposite side at least at the bottom portion, comprising a first side directed toward the inside of the protrusion and an upper first portion A predetermined second length connecting the opposite second side and the apex of the two sides, perpendicular to the corresponding upper end and extended by the adjacent second lower part A predetermined third length having a bottom side and each boxed rectangular first region of the bottom of the box having a side that coincides with (or substantially coincides with) the first fold line. And a second portion that is an extension of the rectangular first region. , On the vertical line with the area of the triangle, being crushed are adjacent region laterally outer end of the second portion and the triangular area to form the corners of crushed triangles;
The width of the rectangular first recessed area is comprised between 0.7 cm and 1.2 cm;
The length of the first rectangular recessed area is comprised between 2 cm and 5 cm;
The inclination of the inclined sides of the protrusion is comprised between 10 ° and 45 °, for example 30 °;
The box is formed of a tray comprising a central panel board with side flaps, at least two opposite side flaps being provided with projections;
The tray includes an edge from which the protrusion is cut;
The box is formed from a cut-out or blank containing a series of at least four main panels, ending with a marginal tab, which are joined together by a first fold line, two of the main panels being connected to the bottom and cover of the box The other two form two first sidewalls facing each other, the series comprising a first set of flaps on one side and a second set of flaps on the other side, Two other side walls adjacent to the first wall facing the set are formed, and the recesses and protrusions are at the first fold line and / or at the outer end of the series of main panels without the flaps, Formed in the panel;
The box is formed from a cutout comprising a series of at least four main panels ending in a marginal tab, which are joined together by a first fold line to form the side wall of the box, said series being a second fold The line is connected to a first set of flaps forming the bottom of the box on one side and to a second set of flaps forming a cover on the other side, and the recesses and protrusions are Formed in the flap at the position of the line;
The box is composed of two cutouts of corrugated paper sheet material: a first cutout that can form an open box for the bottom of the box and a second cutout that can form the cover of the box Formed, the first cutout includes a protrusion and / or a recess, and the second cutout includes a corresponding protrusion or recess.

  The present invention also proposes a cutout or set of cutouts to form a box, as previously described in the present document.

  The present invention also proposes a cutout or set of cutouts for forming a corrugated paper box comprising a side panel board and a main panel board forming a bottom surface. The side panel board comprises at least one protrusion for nesting. The main panel board has a corresponding recess. Each projection has a substantially right trapezoidal shape including one sloping side and another side that is at least partially straight. Each corresponding recess is formed by a recessed rectangular first region of the main panel board and a recessed adjacent triangular second region of the adjacent side panel board. The junction area where the bottom and adjacent side walls meet at the ends of the rectangular and triangular recessed areas can form triangular corners, and when the box is created, It is characterized in that the corners of the triangle can be crushed at an angle with respect to the bottom surface in order to constitute a guide ramp for coupling or extrusion.

  Advantageously, the side panel board is joined to the central panel board by two opposing side panel boards by means of a first fold line on one side, the panel board comprising an upper end on the opposite side and at least one upper end. Each of the protrusions includes at least one corresponding recess that is designed to vertically align with and cooperate with the protrusions of the main panel board and the lower surface of the adjacent side panel board. Oriented to the inside of the protrusion to form a slanted side, forming a predetermined angle with respect to the end, coincident with the upper end of the corresponding side wall, and a predetermined first length Provided with a first side and an upper first part, at least at the bottom part, chamfered towards the inside of the projection to form a straight opposite side and perpendicular to the corresponding upper end A box having an opposite second side extended by two adjacent lower second parts and a short base of a predetermined second length connecting the vertices of the two sides; A first portion of a predetermined third length and an extension of the first region of the rectangle, each of the recessed first regions of the rectangle having sides coincident with the first fold line. The second part and the area adjacent to the outer edge of the triangular area on a straight line perpendicular to the triangular area are designed to be crushed when the box is created Is done.

  Advantageously, the cut or set of cuts is made from at least one cut made of corrugated paper sheet material, i.e. a first cut that can form an open box, the first cut being a protrusion and / or Or a recessed part is included.

  Also advantageously, the set includes a second cutout, the second cutout can form a cover, and includes a recess and / or protrusion corresponding to the protrusion or recess of the first cutout.

  The invention will be better understood from reading the following description of some embodiments given hereinafter by way of non-limiting example.

The present invention refers to the accompanying figures:
It is a perspective view of the tray which illustrates the 1st embodiment of the present invention. It is a top view of the cutout corresponding to the tray of FIG. FIG. 3 is an enlarged view of the protrusion of FIG. 2 and a corresponding recess. 2 is an exploded perspective view from the front and back of an mortise (protrusion) / mortise (recess) coupling according to an embodiment, and more particularly the embodiment described herein. FIG. 2 is an exploded perspective view from the front and back of an mortise (protrusion) / mortise (recess) coupling according to an embodiment, and more particularly the embodiment described herein. FIG. FIG. 3 is a plan view of a cutout according to an embodiment of the present invention in the form of a tray. FIG. 3 is a plan view of a cutout according to an embodiment of the present invention in the form of a tray. FIG. 3 is a plan view of a cutout according to an embodiment of the present invention in the form of a tray. FIG. 3 is a plan view of a cutout according to an embodiment of the present invention in the form of a tray. Figure 7 shows a plan view of a cutout according to another embodiment of the invention for a tray with edges; Figure 2 shows a plan view of two embodiments of cutouts forming a series of panels with flaps according to the present invention with recesses and protrusions in the panel. Figure 2 shows a plan view of two embodiments of cutouts forming a series of panels with flaps according to the present invention with recesses and protrusions in the panel. Figure 2 shows a plan view of two embodiments of a cutout according to the present invention with recesses and protrusions in the flap. Figure 2 shows a plan view of two embodiments of a cutout according to the present invention with recesses and protrusions in the flap. FIG. 6 is a plan view of a cutout for a tray with a cover according to another embodiment of the present invention. FIG. 6 is a plan view of a cutout for a tray with a cover according to another embodiment of the present invention. FIG. 6 is a plan view of a cutout for a tray with a cover according to another embodiment of the present invention. Fig. 4 shows the steps involved in disengaging two coupled boxes according to the present invention. Fig. 4 shows the steps involved in disengaging two coupled boxes according to the present invention. Fig. 4 shows the steps involved in disengaging two coupled boxes according to the present invention.

  FIG. 1 shows a corrugated paper tray 1 according to a first embodiment of the present invention.

  It comprises four rectangular side walls, i.e. two transverse walls 2, 2 'and two longitudinal walls 3, 3' facing each other in pairs and connected at right angles to the rectangular bottom surface 4 .

  The longitudinal walls 3, 3 'each include a lower end 5 connected to the bottom surface by a first fold line and an upper end 6 with two projections 7 for stacking.

  The lower end 5 is provided with a corresponding recess 8 located along the projection.

  Throughout the remainder of the description, the same reference numerals are used to denote the same or similar elements.

  FIG. 2 is a plan view of a cutout 9 that can be used to obtain the tray 1 of FIG.

  This cutout includes a central panel board 4 connected on each side to two rectangular side panel boards 3, 3 ′ forming a bottom surface and forming a longitudinal side wall, which are connected to a first fold line 11. With respect to the central longitudinal axis 10.

  Each one of the side panel boards 3, 3 ′ is additionally connected to a rectangular or square flap 12 at each of its ends by a second fold line 13.

  The central panel board 4 is also connected on the other two sides to the two panel boards 2, 2 'forming a transverse wall by means of a third fold line 14, in a manner known per se. .

  According to the embodiment of the invention described here in more detail (see also FIG. 2A), the upper end 6 is inclined towards the outside of the projection 7, ie from 10 ° to 45 ° with respect to the upper end 6. A substantially right-angled trapezoidal protrusion comprising, as an example, an angle α of 30 ° and, as an example, a first side 15 having a predetermined first length d comprised between 1 cm and 3 cm. 7

  On the opposite side, the projection 7 comprises a second side 16 in which at least the portion 17 adjacent to the upper end 6 (at the bottom) is substantially perpendicular to the corresponding upper end 6.

  More specifically, the second side 16 connects the long bottom 18 of the protrusion that is in line with the end 6 and the short bottom 19 on the outer side of the trapezoid. It includes a chamfered or cut corner 20 at the upper end portion for facilitating the connection in the extended portion towards the outside of the portion 17.

  The length of the long base 18 is L (for example, 5 cm), and the length of the short base 19 (including the chamfered portion) is 1 (for example, 3 cm), and the height of the trapezoid formed by the protrusions The length is h (for example, 1 cm).

  The recess 8 corresponding to the projection of that part includes a rectangular, recessed first region 21 formed in the bottom surface 4 extending in the longitudinal direction, ie parallel to the first fold line 11.

  It has a length l 'configured as an example at 1-7 cm, for example 2-5 cm, and configured as an example at 0.4-1.5 cm, as an example 0.7-1.2 cm Has a width x and l 'is equal to or substantially equal to l (slightly smaller than l, for example 0.1 cm smaller for ease of connection).

  Accordingly, the rectangular indented first region 21 has two longitudinal sides 22, 23, that is, the first side 22 outside the length l and the length l on the first fold line 11. And a second side 23 that coincides with the first portion.

  The recess 8 also includes a triangularly recessed second region 24 adjacent to the end 25 of the first region 21.

  In other words, the recess 8 straddles the first fold line 11 and comprises a rectangular region 21 on one side on the bottom surface 4 and a triangular shape on the other side on the adjacent longitudinal panel board 3 '. A region 24 is provided. The triangle forming the recessed second region 24 is a right triangle and extends to the vertex A on the panel board 3.

  One side 26 of the triangle (starting from vertex A) is in line with one side 27 of the first region of the rectangle, and the other (imaginary) side of the right triangle itself is , On the extension of the fold line 11.

  The hypotenuse 28 of the triangular second recessed area 24 is located on the vertex A and the second longitudinal side 23 of the rectangular area 21 (located on the first fold line). B so that the first and second regions of the recess form only one single hole that straddles line 11.

  According to the present invention, the bottom and side walls meet and a triangular joint area 29 made of corrugated paper is provided to form a crushed corner.

  It is delimited by two fourth fold lines 30, 31 starting from a point C located on the first fold line 11. The point C is on a straight line perpendicular to the vertex D. The vertex D is located on the end 6 and is formed at the end of the trapezoidal slope of the protrusion 7 corresponding to the recess 8 or the end of the first side 15. Therefore, the junction region 29 forms a triangle between the side edges A and E of the recess 8 and the vertex C. The recess 8 is formed by first and second recessed regions facing each other, which face the recess region 8 laterally.

  It can be used to configure a guide ramp for connecting or extruding the upper tray protrusion to the recessed area 8, as more specifically described hereinbelow with reference to FIGS. 8A-8C. Triangulated crushed corners can be formed that are fixed at one side to the bottom and the other side to the wall at an angle to the bottom.

  Thus, when the first tray is created (see FIGS. 3A and 3B), the protrusions 7 can be inserted into the corresponding recesses 8 of the boxes or trays stacked on the first tray, The 29 triangles (during the creation of the tray) take a planar direction that is oblique with respect to the bottom surface 4 and the wall 3 'to form a crushed corner.

  Thus, the latter forms a tetrahedron whose vertex C is on the first fold line and whose base AE is angled and extended by a rectangular first recessed area.

  In other words, the inner surface 32 of the tetrahedral joining area 29 (squeezed corner) thus forms an inclined plane and constitutes a guide slope for the connection or extrusion of the projection 7 of the tray connected below. To do.

  More specifically, during insertion, the inclined first side 15 of the projection 7 abuts the surface 32 and is guided vertically by the latter.

  The protrusion 7 is also guided by the side of the rectangular area 21. The second side 16 of the protrusion 7 is scraped until the side is reliably in contact with the first lateral side of the recess 8.

  The protrusion 7 is then locked by the upper end of the recess and the bottom surface 4 of the tray stacked thereon.

  The tray 1 therefore stays in place correctly even if it is moved around.

  4A-7C illustrate several embodiments of cutouts for boxes or trays according to the present invention.

  In the embodiment illustrated in FIGS. 4A-4D, each tray includes four protrusions 7 and four recesses 8 arranged in pairs on the upper end 6 and the first fold line 11 of the tray, respectively. .

  Thus, referring to FIG. 4A, the cut-out has a center of symmetry 33, and the protrusion 7 and the recess 8 are therefore formed symmetrically with respect to the center 33.

  In FIG. 4B, there is longitudinal symmetry with respect to the longitudinal axis 34 of the cut-out, and in FIG. 4C, there is lateral symmetry with respect to the lateral direction axis 35.

  4A-4C, a set formed by four pairs of protrusions / recesses is vertically centered, and for each pair, a second fold line 14 closest to that pair and an average equal between the pair. Leave the distance y.

  FIG. 4D shows an arrangement 36 for obtaining two identical cutouts with staggered configurations at the same time, allowing the formation of two trays to limit the piece of corrugated paper.

  Here, the pair of protrusions 7 / recesses 8 is not centered or symmetrical and corresponds between the second fold line 14 and the first pair 37, opposite the second pair 38. A distance a smaller than the distance b between the folding lines is left.

  This allows savings in corrugated paper, since the first and second cutouts are arranged relative to one another.

  FIG. 4E shows another embodiment of a cutout 39 according to the present invention for making a tray with edges. The cut-out here is on the one hand that the transverse walls 2, 2 'are substantially T-shaped, the outer end of the horizontal bar of T coincides with the second fold line 14, and on the other hand it is further longitudinal. The cut-out of FIG. 4A as a whole, except that on each side of the directional panel board 3, 3 ′ includes a rectangular flap 40 to which it is connected by a fifth fold line 41 parallel to the first fold line. It is the same.

  Each fifth fold line includes two discontinuities 42 that form a protrusion by cutting its outer periphery (except its long bottom).

  A rectangular flap 40 forms the edge of the produced tray and includes a marginal flap 43 articulated at each of their longitudinal ends, as is known per se.

  5A-7C show an embodiment according to the present invention for a corrugated cardboard box including a bottom surface and a cover.

  FIGS. 5A and 5B illustrate cutouts to form a box that includes a set of four main panels 44, 45, 46, 47 that terminate in a fold tab 48.

  The main panel and the margin tab are connected to each other by first fold lines 49, 50, 51, 52.

  Two of the non-adjacent main panels (44, 46 in FIG. 5A or 45, 47 in FIG. 5B) form the bottom and cover of the box, and the other two panels, when the box is created, Two opposing first sidewalls are formed.

  The series of panels is provided with a first set 53 of flaps on one side and a second set 54 of flaps on the other side for forming part of the side wall. is there.

  In FIG. 5A, the recess 8 is formed on one of the first fold lines 50 of one of the main panels 45 forming the bottom surface 4. The protrusions 7 are formed in the corresponding adjacent panels 47 on the first fold line 51 on the opposite side of the adjacent panels 46, themselves facing each other.

  In FIG. 5B, on the one hand, there is a first pair of protrusions 7 continuous on the upper end 6 of the panel 44 and on the other hand on the first fold line 49-52, then the first fold line. On 49 there is a corresponding pair of recesses 8, then on the fold line 50 there is another pair of recesses 8 and finally on the next fold line 51 of the panel 46 of the corresponding projection 7. There is a second pair. A recess 55 in the margin tab 48 is also provided to accommodate the projection 7 of the panel 44.

  In summary, the protrusions 8 and 7 are formed in the panel at a series of positions on the outer edge 6 without the first fold line and / or flap.

  The first pair of protrusions 7 of the protrusion 7 has, for example, a height that is greater than the height of the second pair or is on the bottom surface of the rectangle between the upper end and them. Thus, the thickness of the corrugated cardboard through which they pass is compensated to provide a protrusion 7 with the same holding capacity on each of the two sides of the box.

  In the embodiment of FIGS. 6A and 6B, the cutout includes a series of four rectangular panels 56, 57, 58, 59 with a marginal tab 60. Two sets of flaps 61 and 62 are joined to each side of the panel by joint lines 63 and 64. Here, the protrusion 7 and the recess 8 are located on the joining lines 63 and 64, respectively. In the joint lines 63 and 64, the projection 7 and the recess 8 are connected to the panel, and the bottom surface 4 and the cover are formed by flaps at the height of the joint line.

  In FIG. 6A, the protrusion 7 and the recess 8 are formed on each side of the same panel 58.

  In FIG. 6B, the two non-adjacent panels 56 and 58 include a protrusion 7 and a recess 8.

  Figures 7A-7C show three sets 65, 66, 67 of two cutouts (70, 71; 72, 73; 74, 75) for making a box according to another embodiment of the present invention.

  The box forms a cover with two cuts of corrugated paper sheet material: a first cut-out (70, 72, 74) that can form an open box for the bottom face 4 of the box and a top face 76 of the box. With a second cutout (71, 73, 75) that can be made.

  In the embodiment of FIGS. 7A and 7B, the first cutouts 70, 72 include protrusions 7 or recesses 8 and the second cutout includes corresponding recesses 8 or protrusions 7 on corresponding fold lines.

  The first cutout that forms the bottom surface 4 is similar to that described in FIG. 2, but differs in that it includes only protrusions or recesses 8.

  The second cutout forming the cover is itself connected to the first flap 77 in the longitudinal direction by the first fold line 78 and to the second flap 79 in the lateral direction by the second fold line 80. The main panel 76 is formed.

  In FIG. 7A, the first cutout 70 includes the central panel board 4, and two protrusions 7 are formed on each side of the second fold line 82. The cover includes four recesses disposed in pairs on each of the first fold lines 83 of the second cutout.

  In FIG. 7B, the locations of the protrusions and recesses are inverted, and the protrusions are formed on the second cutout main panel 76.

  In FIG. 7C, the first cutout is similar to that described in FIG.

  The second cutout itself includes a rectangular opening 84 having a suitable length and width through which the protrusion 7 can pass at a location in the main panel 76 that is aligned perpendicular to the protrusion 7.

  The stacking function according to the present invention will be described with more specific reference to FIGS.

  In FIG. 8A, the first tray 85 is placed on the second tray 86 and stacked. The protrusions 7 of the second tray 86 are therefore locked into the corresponding recesses 8 of the first tray 85, and the recesses thus act like a mortise.

  In FIG. 8B, a normal force (arrow 87) is applied to one of the ends 88 of the first tray, for example by an operator.

  The upper first tray 85 is therefore lifted as a result of the applied force, thus releasing the projection 7 of the bottom second tray 86 on the relevant side.

  On the opposite side, the inclined portion of the first side 15 of the protrusion 7 rotates by slightly pressing the second side of the concave portion 8 on the joining area and / or with a slip.

  Next, a longitudinal and diagonal force 89 is applied to the tray by the operator pulling the first tray in his / her direction (see FIG. 8C).

  On the opposite side, the projection 7 slides longitudinally along the rectangular recess 8 and the crushed corner surface forms a guide slope at the same time as applying a lateral force on the projection. .

  The transverse force then tends to move the protrusions aside when the protrusions are no longer maintained vertically by the upper first tray sidewall.

  When the protrusion slides until the straight end of the protrusion moves beyond the first portion of the rectangular area of the corresponding recess, the protrusion then moves away from the tray on the opposite side of the upper tray sidewall. Extruded.

  The chamfering of the straight end portion can prevent the straight end portion from being caught on the second side of the concave portion of the upper tray, so that the extrusion is facilitated. Unloading from the pallet is therefore much easier.

  Needless to say, and as is apparent from the foregoing, the present invention is not limited to the embodiments described in more detail. Rather, the present invention encompasses all alternatives and particularly those in which the protrusions are located on walls other than the walls that form the outer wall of the box, such as reinforced internal panel boards.

Claims (17)

A packaging box made of corrugated paper,
Including side walls (2, 2 ', 3, 3'; 45, 47; 57, 59) and a bottom surface (4; 46; 58);
At least one side wall (3, 3 '; 45, 47) comprising at least one stacking projection (7) and the bottom surface (4; 46; 58) comprising a corresponding recess (8);
Each protrusion (7) has a substantially right trapezoidal shape including one inclined side (15) and at least another side (16) that is straight at the bottom portion;
Each corresponding recess (8) has a recessed rectangular first region (21) in the bottom (4) of the box and adjacent side walls (2, 2 ', 3, 3'; 45, 47; 57, 59 ) And a concavely adjacent triangular second region (24),
The bottom (4; 46; 58) and the adjacent side walls (2, 2 ', 3, 3'; 45, 47; 57, 59) are the ends of the recessed areas of the rectangle (21) and the triangle (24). The joining area (29) that intersects at an angle forms a corner of the crushed triangle that forms an angle with the bottom surface (4; 46; 58) for coupling or extrusion with the projection (7) of the lower box The box that composes the guide slope. A concave rectangular first area (21)
A first side (22) that faces and is perpendicular to the side (17) of the projection (7) that is straight at least at the bottom portion and is capable of contacting the projection (7) of the upper box;
A second side (23) at an angle to the bottom surface (4; 46; 58) and delimited at adjacent side walls (2, 2 ', 3, 3'; 45, 47; 57, 59) And including
One side of the recessed triangular region (24) can form a corner of the crushed triangle;
Box according to claim 1, designed so that the corners of the crushed triangle are in contact with the inclined sides (15) of the projection (7) of the lower box. Including a bottom surface (4; 46; 58) and at least four side walls (2, 2 ', 3, 3'; 45, 47; 57, 59), of which two opposing walls are on one side Connected to the bottom surface (4; 46; 58) by a first fold line (11; 49, 50, 51, 52), including an upper end (6) on the other side;
The upper end (6) includes at least one protrusion (7), the lower end of the bottom surface (4; 46; 58) and the adjacent sidewall (2, 2 ', 3, 3'; 45, 47; 57, 59) At least one corresponding recess (8), which is in a straight line perpendicular to the protrusion (7) and can cooperate with the protrusion,
Each projection (7) is aligned with and / or coincides with the upper end (6) of the corresponding side wall (2, 2 ', 3, 3'; 45, 47; 57, 59) In order to form a predetermined angle (α) with respect to the base (18) having a long length ( L ) and the end (16) and to form an inclined side (15), it is formed inside the protrusion (7). A first side (15) oriented towards the top and a first upper part (20), at least a bottom part (19) to form a straight opposite side (16) Opposite second side (16) chamfered inward of (7), perpendicular to the corresponding upper end (16) and extended by the adjacent lower second part (17) And a short base of a predetermined second length ( l ) connecting the vertices of the two sides (15, 16),
The first area (21) of each recessed rectangle on the bottom surface (4; 46; 58) of the box has one side that coincides with the first fold line (11; 49, 50, 51, 52). A first portion (23) of a predetermined third length and a second portion (25) that is an extension of the rectangular first region (21);
In a straight line perpendicular to the triangular area (22), the second part and the area adjacent to the lateral outer edge of the triangular area (22) are crushed to form the corners of the crushed triangle. The box according to claim 2. 4. Box according to claim 3, characterized in that the width ( x ' ) of the first rectangular recessed area is comprised between 0.7 cm and 1.2 cm.   Box according to any one of claims 1 to 4, characterized in that the length of the rectangular first recessed area (21) is comprised between 2 cm and 5 cm.   6. Box according to any one of the preceding claims, characterized in that the slope ([alpha]) of the inclined side (15) of the projection (7) is comprised between 10 [deg.] And 45 [deg.].   Formed of a tray comprising a central panel board (4; 46; 58) with side flaps (2, 2 ', 3, 3'; 45, 47; 57, 59), at least two opposite sides Box according to any one of the preceding claims, characterized in that the side flaps are provided with protrusions (7).   A box according to claim 7, characterized in that the tray includes an edge (40) into which the protrusion (7) is cut.   Formed from a cutout comprising a series of at least four main panels (44, 45, 46, 47) ending in a marginal tab (48), which are joined together by a first fold line (49, 50, 51, 52) Two of the main panels (44, 46) form the bottom and cover of the box, and the other two (45, 47) form two first side walls facing each other, A first set of flaps (53) on one side and a second set (54) of flaps on the other side, the other two side walls adjacent to the first wall facing the set The recesses (8) and projections (7) are formed at the first fold line and / or at the unwrapped outer end position of the series of main panels, said panels (44, 45, 46, 47). Claims formed One box of one claim of 6.   Formed from a cutout comprising a series of at least four main panels (56, 57, 58, 59) ending in a marginal tab (60), which are joined together by a first fold line to form a side wall of the box; The series is joined by a second fold line (63, 64) to a first set of flaps (61) forming the bottom of the box on one side and a first of the flaps forming a cover on the other side. 1 to 6, characterized in that the second set (62) is joined and the recess (8) and the projection (7) are formed in the flap at the position of the second fold line (63, 64). The box as described in any one of.   Two cutouts of corrugated paper sheet material (70, 71; 72, 73; 74, 75), ie first cutouts (70, 72, which can form an open box for the bottom face of the box (4) 74) and a second cutout (71; 73; 75) capable of forming a box cover, the first cutout comprising a protrusion (7) and / or a recess (8), Box according to any one of the preceding claims, characterized in that the cut-out of the box comprises a corresponding protrusion (7) or recess (8). A cutout or set of cutouts (9; 39; 70, 71; 72, 73; 74, 75) to form a corrugated paper box, comprising a side panel board and a main panel board forming a bottom surface,
The side panel boards (2, 2 ', 3, 3'; 45, 47; 57, 59) are provided with at least one protrusion (7) for nesting, the main panel board having a corresponding recess (8) With
Each protrusion (7) has a substantially right trapezoidal shape including one inclined side (15) and another side (16) that is at least partially straight;
Each corresponding recess (8) is formed by a recessed rectangular first region (21) of the main panel board and a recessed adjacent triangular second region (24) of the adjacent side panel board. ,
A junction region (29) where the bottom and adjacent sidewalls meet at the ends of the recessed regions of the rectangle (21) and the triangle (24) can form triangle corners, creating a box. A cutout, characterized in that the corners of the triangle can be crushed at an angle with respect to the bottom surface to form a guide slope for coupling or extrusion with the projection (7) of the lower box Or a set of cutouts. The side panel board is joined to the central panel board by two opposing side panel boards by means of a first fold line (11; 49, 50, 51, 52) on one side, the panel board being the upper end on the opposite side (6), the upper end includes at least one protrusion (7), and the lower surface of the main panel board and the lower surface of the adjacent side panel board are vertically aligned with and cooperate with the protrusion (7). Comprising at least one corresponding recess (8) designed in
Each protrusion (7) coincides with the upper end (6) of the corresponding side wall and has a long base (18) having a predetermined first length ( L ) and a predetermined angle ( α ) with respect to the end (6). A straight opposite side with a first side directed toward the inside of the protrusion (7) and an upper first part (20) to form a slanted side To form (17), the chamfered inward of the protrusion (7), perpendicular to the corresponding upper end (6) and extended by the adjacent lower second part (17) A second side (16) on the side and a short base (19) of a predetermined second length ( l ) connecting the vertices of the two sides (15, 16),
A predetermined third length of the rectangular first region (21) of the bottom of the box having sides coincident with the first fold line (11; 49, 50, 51, 52) A first part (23) and a second part in an extension of the rectangular first region (21);
In a straight line perpendicular to the triangular area (24), the second part and the area adjacent to the outer edge of the triangular area are designed to be crushed when the box is created 13. A cutout or set of cutouts according to claim 12.   Made from a blank containing a series of at least four main panels (56, 57, 58, 59) ending in a marginal tab (60), which are joined together by a first fold line to form the side wall of the box; The series is joined by a second fold line (63, 64) to a first set of flaps (61) forming the bottom of the box on one side and a first of the flaps forming a cover on the other side. 14. Cutout according to any one of claims 12 or 13, characterized in that it is connected to the second set (62) and the recesses and projections are formed in the flap at the position of the second fold line.   Created from a blank containing a series of at least four main panels (44, 45, 46, 47) ending in a marginal tab (48), which are connected to each other by a first fold line (49, 50, 51, 52) Combined to form a side wall of the box, said series comprising a first set (53) of flaps forming on one side the bottom face of the box and on the other side a second set of flaps forming a cover And a recess (8) and a protrusion (7) are formed in said panel at a position of the first fold line and / or the unwrapped outer end of a series of main panels. 14. A cut-out or set of cut-outs according to claim 13, characterized in that   Made from at least one cut-out (70; 72; 74) made of corrugated paper sheet material, ie a first cut-out that can form an open box, the first cut-out being a protrusion (7) and / or 14. Cutout or set of cutouts according to any one of claims 12 or 13, characterized in that it comprises a recess (8).   A recess (7) comprising a second cutout (71; 73; 75), wherein the second cutout can form a cover, corresponding to the protrusion (7) or recess (8) of the first cutout, and 17. A set of cutouts according to claim 16, characterized in that it includes / or protrusions (8).

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