FR2838103A1 - BLANK AND BOX ASSEMBLY WITH POLYGONAL SECTION - Google Patents

Abstract

The invention concerns an assembly of blanks and a box made of corrugated sheet or the like designed to form a box (36) with polygonal cross-section. The box comprises a first blank including a series of four panels (3, 4, 5, 6), each panel comprising on one side a free edge (12, 13, 15, 16) and on the other a flap (10, 11, 17, 18) arranged opposite the adjacent panel, bonded on the bottom or on the lid. It further comprises second and third blanks (21, 28) designed respectively to form the bottom and the lid of the box, each including a central flap (22, 29) provided with two opposite free edges (26, 27, 33, 34) and two opposite lateral flaps (23, 24, 30, 31), bonded at right angle with the respective free edges (12, 13, 15, 16) of the adjacent flaps.

Description

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BLANK AND BOX ASSEMBLY WITH POLYGONAL SECTION
The present invention relates to a set of blanks of material of cardboard sheet or equivalent intended to form a box with polygonal section comprising lateral faces, an upper face forming a cover and an inner face forming the bottom of the box.

 It also relates to such a fund.

 Polygonal boxes are already known, in particular suitable for being mounted around a mandrel from blanks formed by a series of flaps provided on either side with a set of flaps intended to form the bottom and the cover of the box.

 Such boxes have advantages in particular at the time of assembly and also in resistance to compression.

 However, they will not always allow the constitution of solid and stable stacks during the stacking of these boxes on a pallet insofar as the boxes can slide relative to each other.

 Alternatively, these boxes have lower and / or upper faces having discontinuous surfaces, which are not leaktight, since they are formed from several parts of flaps which are more or less contiguous.

 The present invention aims to provide a set of blanks and a box with a polygonal cross-section which responds better than those previously known to the requirements of practice, in particular in that it allows good lateral and vertical blocking of the corrugated boxes one by one. compared to others while

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 offering lower and upper body sides in one piece.

 It also allows economical production of boxes thanks to the use of blanks cut contiguously, flat, which minimizes cardboard losses.

 Thanks to the invention, it is also possible to optimize the type of cardboard used, for example by choosing different cardboard qualities for the cover, the belt and / or the bottom. Thus, the resistances of these three parts of the body will be able to vary, which has an important advantage.

 To this end, the invention essentially proposes a set of blanks of material of corrugated cardboard sheet or equivalent intended to form a box of polygonal section comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the box. , characterized in that it comprises a first blank capable of constituting the lateral faces of the box, said first blank comprising a series of four rectangular flaps terminated by a fixing tab, connected together by parallel fold lines, each flap comprising on one side a free edge perpendicular to said fold lines and on the other side a flap disposed in opposition relative to the flap of the adjacent flap, said flaps being arranged to cover the outer surface of said upper face or said lower face to be glued to it, and in that it comprises a second and a third blanks intended respectively to form the

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 bottom and cover of the box, each comprising a central flap to form the lower or upper face, each central flap being provided with two opposite free edges and two opposite lateral flaps arranged to at least partially cover the external surface of two opposite flaps suitable for forming the lateral faces, in line with the respective free edges of said flaps, to be glued to them.

 In advantageous embodiments, recourse is had to one and / or the other of the following arrangements: the flaps of two opposite flaps of the series of flaps suitable for forming the side faces have form-shaped side edges complementary or adaptable to the lateral edges of the flaps of the adjacent flaps of said series of flaps; - The flaps of the series of flaps are trapezoidal; - The upper free edges of two of the side flaps intended to form the side walls of the box are provided with at least one stacking lug, and the fold lines of the flaps of the central flap of the cover wall have one or more notches corresponding; - At least two blanks among the first, second and third blanks are corrugated cardboard of different quality and / or thickness.

 For example, the first blank is made of thin double-sided cardboard, for medium compressive strength, the bottom of double-double or double-sided cardboard very thick to support heavy products and the corrugated cover

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 double face of medium thickness, to allow a good grip for suction cups.

 The invention also provides a box obtained with a set of blanks as described above.

 It also offers a box with polygonal section comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the box, characterized in that two opposite lateral faces are devoid of flap on the side of the cover and provided with flaps of the side of the bottom, and two other opposite faces are devoid of flap on the side of the bottom and provided with flaps on the side of the cover, said flaps being respectively glued to the upper face and the lower face of the body, and in that the bottom and the cover are respectively formed of a single central flap provided with two opposite free edges and two opposite side flaps, said flaps being respectively glued to the outer surface of corresponding side faces, in line with the respective free edges of said faces.

 Advantageously, the box is arranged to be formed around a mandrel.

 The invention will be better understood on reading the following description of an embodiment given below by way of non-limiting example.

 The description refers to the accompanying drawings in which: - Figure 1 is a top plan view of first blanks belonging to an assembly according to an embodiment of the invention.

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 - Figures 2 and 3 give plan views of the second and third blanks intended respectively to form the bottom and the cover of a box according to the embodiment of the invention more particularly described here.

 FIG. 4 is a perspective view of an open box, devoid of a cover, obtained from the blanks of FIGS. 1 and 3.

 FIG. 5 is a block diagram in perspective, showing the steps for forming the box of FIG. 4.

 - Figure 6 shows in perspective, the vertical interlocking of two boxes formed according to Figure 4.

 Figure 1 shows several first blanks 1, 1 ', 1' ', 1' '' of corrugated sheet material, for example of thin thickness (2 to 3 mm) to form the walls of a box according to the method of embodiment of the invention more particularly described here.

 Each blank 1 comprises a series 2 of four rectangular flaps 3, 4, 5 and 6 terminated by a bonding tab 7, for example trapezoidal, linked together by first parallel fold lines 8.

 Each flap comprises on one side a free edge perpendicular to said first fold lines 8 and on the other side an isosceles trapezoidal flap connected to the opposite edge of the free edge, by a second fold line 9 perpendicular to the first fold lines 8 .

 The flaps are located on either side of the suite, alternately, sometimes on the side which will be that of the bottom of the box, sometimes on the side which will be that of the cover of the box.

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 More specifically, the suite comprises two identical identical first rectangular flaps 3 and 6 provided with flaps 10 and 11 situated on the same side which will be that of the top of the body, and comprises on the other side two straight free edges 12 and 13, said first flaps being intended to form the transverse lateral faces of the body.

 These advantageously each comprise a central recess 14, forming a handle.

 Suite 2 also includes two second identical rectangular flaps 4 and 6 provided with free edges 15 and 16 situated on the same side of the suite as the flaps 10 and 11 of the first two flaps 3 and 5, and each provided respectively with a flap 17 and 18 located on the same side of the series as the free edges of flaps 3 and 5.

 These two flaps 4 and 6 are for their part intended to form the longitudinal lateral faces of the body.

 In the embodiment more particularly described, the free edges 15 and 16 of the flaps 4 and 6 are respectively provided with two pins 19 for blocking the cover and / or stacking. The nipple is for example formed by a small rectangle located in the extension of the lateral face, 1 to 2 mm high.

 Symmetrically the flaps 17 and 18 are terminated on the side opposite to the fold lines 9, by a free edge comprising two notches 20 of shape complementary to that of the nipples, so that the cardboard scraps are minimized during the flat cutting (cf. Figure 1), the nipples 19 'of a blank 1'

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 fitting into the 20 '' notches of the directly adjacent 1 '' blank.

 The edges of the flaps 10 ', 11' of the blank 2 'are also in contact with the free edges 12' ', 13' 'of the adjacent blank 1' ', which minimizes cardboard losses.

 In the embodiment more particularly described here, the second fold lines 9 between flaps and flaps are offset slightly, for example by a half thickness of cardboard, relative to the free edges of the adjacent flaps.

 In another embodiment, they are aligned with said edges.

 Figure 2 shows a plan view of a second blank 21 intended to form the bottom of the box.

 The blank 21 has a rectangular central flap 22 suitable for forming the lower face of the body, in one piece, and two trapezoidal flaps 23 and 24, opposite, connected on either side to the flap 22 by fold lines 25. The other two opposite edges 26 and 27 of the flap 22 are free.

 The flaps 23 and 24 are intended to be glued to the external faces of the flaps 3 and 5, forming the transverse lateral walls of the box.

 Figure 3 shows a plan view of the third blank 28 intended to form the cover of the box.

 The blank 28 comprises a rectangular central flap 29 capable of forming the lower face of the box, in one piece.

 The central flap 29 is provided with two identical, opposite trapezoidal flaps 30 and 31, connected to said flap by fold lines 32 and two

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 free edges 33 and 34. Each fold line 32 has two slots 35 adapted to cooperate with the pins 19 of the box.

 In the following description, the same reference numbers will be used to designate the same elements.

 FIG. 4 shows a box 36, open, of rectangular section, formed from the first blank 1 and the second blank 21.

 It has a belt of lateral faces 3, 4.5 and 6 terminated by a bonding tab, glued to the external face of the wall 3 adjacent to the flap 6.

 The two opposite lateral faces 3 and 5 have flaps 10 and 11 in the upper part and are devoid of flaps in the lower part, lower part on the external surface of which the flaps 23 and 24 of the central flap 22 of the bottom are respectively stuck.

 FIG. 5 schematically shows a method of forming the body 6, by winding a blank 1 around a mandrel (not shown), after bonding the bottom wall 21 to the lower flap 17 of the longitudinal flap 4 of the suite 2, in a manner known in itself.

 The assembly is wound around the mandrel after gluing of the second flap 18, of the tongue 7, and of the flaps 23 and 24, then by plate, by pressurization (jacks and / or push plates) of the flaps on the external faces of the shutters concerned opposite.

 Then, after vertical delivery and filling of the box, we come to cover the open box

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 by the blank 28 of the cover, the notches or slots 35 which fit into the studs 19, and the previously glued flaps 30 and 31 being closed on the free edges 15 and 16 of the side walls.

 The shape of the lateral edges 37 of the flaps 10 and 11 glued to the external faces of the central flap 29 of the cover is complementary to that of the edges 38 'of flaps 17', 18 'glued to the external face of the central flap 22' of the bottom, which allows the embedding of the bottom of the top box on the cover of the bottom box, the dimensions of said flaps being also arranged to allow an edge to edge junction of these flaps.

 Such embedding, edge to edge, excludes any sliding of a box 36 relative to the other 36 '.

(see figure 6).

 As is obvious and as also follows from the above, the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all variants and in particular those where the body is folded glued, the bottom being simply folded down on the continuation for the transport.

Claims (10)

1. Set of blanks of corrugated sheet material or equivalent intended to form a box (36, 36 ') with polygonal section comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the box, characterized in that it comprises a first blank (1, 1 ', 1' ') suitable for constituting the lateral faces of the box, said first blank comprising a series (2) of four rectangular flaps (3,4, 5,6) terminated by a fixing tab (7), interconnected by parallel fold lines (8), each flap comprising on one side a free edge (12 13,15, 16) perpendicular to said fold lines and the 'other side a flap (10, 11, 17,18) disposed in opposition relative to the flap of the adjacent flap, said flaps being arranged to cover the outer surface of said upper face or said lower face to be glued thereto, and in what it has a second and a third fla ns (21,28) respectively intended to form the bottom and the cover of the box, each. comprising a central flap (22,29) to form the lower or upper face, each central flap being provided with two opposite free edges (26,27, 33, 34) and two opposite lateral flaps (23, 24; 30, 31 ) arranged to cover at least partially the external surface of two opposite flaps suitable for forming the lateral faces, in line with the free edges (12, 13; 15, 16)) respective of said flaps, to be glued thereto. <Desc / Clms Page number 11>  2. Set of blanks according to claim 1, characterized in that the flaps (10, 11) of two opposite flaps (3,5) of the series of flaps suitable for forming the lateral faces have lateral edges (37) of shape complementary to the lateral edges (38) of the flaps (17, 18) of the adjacent flaps (4, 5) of said series of flaps.  3. Set of blanks according to claim 2, characterized in that the flaps (10,11, 17,18) of the series of flaps are of trapezoidal shape.  4. Set of blanks according to any one of the preceding claims, characterized in that the upper free edges (15, 16) of two of the side flaps (4, 6) intended to form the side walls of the box are provided with at least one stud (19), and in that the fold lines (32) of the flaps (30, 31) of the central flap (29) of the cover wall have one or more corresponding notches (35).  5. Set of blanks according to any one of the preceding claims, characterized in that at least two blanks from the first, second and third blanks are made of corrugated cardboard of different quality and / or thicknesses.  6. Box (36) of sheet material of corrugated cardboard or equivalent, having a polygonal section, comprising lateral faces, an upper face forming the cover and a lower face forming the bottom of the box, characterized in that two lateral faces opposite (4,6) are devoid of flap on the side of the cover and provided with flaps (17,18) on the side of the bottom, and two other faces <Desc / Clms Page number 12>  opposite (3,5) are devoid of flap on the side of the bottom and provided with flaps (10,11) on the side of the cover, said flaps being respectively glued on the upper face and the lower face of the body, and in that the bottom (21) and cover (28) are respectively formed of a single central flap (22, 29) provided with two opposite free edges (26, 27; 33, 34) and two opposite side flaps (23, 24; 30, 31), said flaps being respectively glued to the outer surface of two lateral faces corresponding to the right of the respective free edges of said faces.  7. Box according to claim 6, characterized in that the flaps of the lateral faces constitute protruding protrusions relative to the exterior surfaces of said upper and lower faces, the lateral edges of the flaps of two adjacent lateral faces are of adapted shapes or complementary, to allow an interlocking with the flaps of a box arranged below or above.  8. Box according to claim 7, characterized in that the flaps of the lateral faces are of trapezoidal shape.  9. Box according to any one of claims 6 to 8, characterized in that the upper free edges (15,16) of two of the side flaps (4,6) intended to form the side walls of the box are provided with at least one stud (19), and in that the fold lines (32) of the flaps (30, 31) of the wall (29) of the cover comprises one or more corresponding notches (35). <Desc / Clms Page number 13>  10. Box according to any one of claims 6 to 9, characterized in that it is arranged to be formed around a mandrel.