DE20112752U1 - Packing unit with an octagonal cross-section - Google Patents

Description

KAPGM01136 -1-1 I **&Sgr; * J IJ I' III 07.08.01

Applicant: Kappa Wellpappe Wiesloch

Branch of

Kappa HoIfeider Werke GmbH & Co. KG

On the Autobahn 1

68789 St. Leon-Rot

Packaging unit with octagonal cross-section

Description

Packaging units with an octagonal cross-section are more rigid than packaging units with a rectangular cross-section and are therefore less likely to bulge after being filled with bulk goods with a high density, for example. In addition, their greater rigidity makes them easier to stack and therefore easier to store.

Packaging units with an octagonal cross-section made from two different inline-manufactured octagonal rings and a rotationally manufactured octagonal base and lid are known, i.e. a total of four parts. Packaging units with an octagonal cross-section made from a rolled base with a raised edge, ring and lid are also known, i.e. a total of three parts. The parts are cut out, punched, grooved and scored from flat corrugated cardboard boxes, for example.

A creasing is a squeezing of the corrugated cardboard and is used to specify a fold line. A scoring is a cut through a layer of corrugated cardboard so that the cardboard is bent along the scoring: lierden: icänn*. ·· ·**: "*!"':'.'.'·*": : : ··

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A side flap along a groove can be attached to the opposite side of the flat cardboard box, for example by means of gluing and/or staples, so that this folding creates a closed ring, for example. The disadvantage of these known packaging units is the many different components that have to be manufactured separately, which makes the construction of the packaging units complex.

The object of the invention is to create a packaging unit with an octagonal cross-section that is easy to manufacture and handle.

This object is achieved by the invention according to the independent claim. Advantageous developments of the invention are characterized in the subclaims.

The packaging unit according to the invention has a base and a lid, each made from separately prefabricated blanks. Each blank can be folded and closed separately and parallel to a common central axis of the base and lid to form a closed ring. The blanks for the lid and the base are each provided with eight parallel grooves parallel to the common central axis and one groove perpendicular to the common central axis. This means that on the one hand eight side surfaces in the base blank and eight side surfaces in the lid blank are each defined by two adjacent grooves. On the other hand, the grooves perpendicular to the common central axis enable at least four base and lid flaps for each blank, which are arranged as an extension of the side surfaces and can be pivoted about the grooves perpendicular to the common central axis.

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The packaging therefore consists of rings with an integrated folding bottom.

More than four base and lid flaps can be provided for each cut. Two of the base and lid flaps, namely the opposing base and lid flaps in extension of the third and seventh side surfaces, give the octagonal packaging its shape. They are essentially hexagonal. If they are folded inwards, they give the packaging its essentially octagonal shape. By choosing the right hexagonal shape for the base and lid flaps (length of the sides and the angle), the packaging can be given the shape of an isosceles or unequal-sided octagon.

In the preferred embodiment as a substantially isosceles octagon, two sides of the hexagonal base or lid flaps adjacent to the vertical groove each enclose an angle of approximately 45° and approximately 135° with the vertical groove.

Furthermore, retaining elements are provided which can fix the hexagonal base and cover flaps in their position. These can be at least two further base or cover flaps or modifications thereof. Essentially rectangular, long base and cover flaps which are provided on the first and fifth side surfaces are preferably used for this purpose.

The hexagonal base and lid flaps each have retaining elements that complement the retaining elements on the essentially rectangular, long lid flaps. These are special modifications of the cuts that interlock to achieve a fixation.

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Preferably, short base and cover flaps are provided on the second, fourth, sixth and eighth side surfaces, of which one side adjacent to the vertical groove forms an angle of approximately 45° or approximately 135° with the vertical groove in the preferred embodiment as a substantially isosceles octagon. If the short base or cover flaps are folded inwards by 90°, they stabilize the second, fourth, sixth and eighth side surfaces. The latter are thus even more resistant to bulging.

The base or lid, which can be folded and closed into a ring with a lateral end tab on the blank, is given an octagonal cross-section by first pivoting the essentially hexagonal base or lid flaps towards each other, preferably by a little more than 90°, into the interior of the ring. The side surfaces are then pivoted around the eight parallel grooves until the side surfaces lie against the shaping sides of the hexagonal base or lid flaps. The essentially square, short base and lid flaps are then pivoted towards each other, preferably by around 90°, into the interior of the ring. Finally, the essentially rectangular, long base and lid flaps are pivoted over them, preferably by around 90°, into the interior of the ring.

The retaining elements on the rectangular, long base and lid flaps are fixed to the complementary retaining elements of the hexagonal base and lid flaps, thus keeping all base and lid flaps flat in the closed position.

The lid has a slightly larger inner diameter than the bottom, so that the lid can be put on the bottom.

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This creates an octagonal packaging unit from just two cut pieces, whereby the cut pieces can be transported individually and folded flat on pallets so that they can be stacked. The octagonal packaging unit is dimensionally stable and, when filled with all kinds of bulk goods, is particularly stable against bulging. The octagonal packaging unit according to the invention is stackable. It can be easily assembled and disassembled by one person alone. After use, it can be disassembled without damage and stacked and transported for reuse.

Preferably, the essentially rectangular, long base or lid flaps are as long as the essentially hexagonal base or lid flaps, namely approximately as long as half the diameter of the octagonal packaging. As a result, the flaps folded inwards meet in the middle, which stabilizes the packaging against external pressure.

Preferably, the essentially rectangular, long base and cover flaps are provided with grooves on the side edges of the free ends facing away from the vertical grooves, so that the base and cover flaps are designed with tapered, yielding side edges. This makes them flexible with regard to manufacturing tolerances.

In order to achieve a particularly good fixation of the base and lid flaps, the essentially rectangular, long lid flaps are provided with elongated punched holes forming slots as part of the retaining elements in the free ends facing away from the vertical scoring and essentially parallel to the side edges. Furthermore, the essentially hexagonal base and lid flaps each have a tongue that can be inserted into the slots. The tongue is formed by tj&e'ignetp JRitzuljgfen: unH ikilllinc|eii and tapered

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towards the free end of the flaps. This design of the complementary retaining elements means that - when used primarily for the lid - the lid is slightly curved into the interior of the packaging, i.e. kept concave, and does not protrude outwards.

Alternatively, the essentially hexagonal base or lid flaps can be fixed in place by the following design of the retaining elements. The essentially hexagonal base or lid flaps have small flaps on the free ends facing away from the vertical grooves, the shape of which is determined by two notches and one groove. The rectangular, long base or lid flaps are clamped under the small flaps. This results in a particularly flat design of the base or lid.

In order to be able to easily remove bulk material that has been filled in, the small flaps on the essentially hexagonal base or cover flaps as well as the essentially rectangular, long base or cover flaps can be provided with superimposed, semicircular perforations for a discharge device. In the same way, a discharge device can be provided in one of the side surfaces.

The invention is illustrated below using a preferred embodiment. Shown are:

Fig. 1 a blank for the bottom of the octagonal packaging;

Fig. 2 a blank for the lid of the octagonal packaging;

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Fig. 3 a spatial representation of the octagonal packaging unit; and

Fig. 4 an alternative cut for the lid of the octagonal packaging.

Reference is made below to Fig. 1. A base 2 of an octagonal, isosceles packaging unit 1 (see Fig. 3) is pre-punched from a separate, flat element, e.g. a two-layer corrugated cardboard with a B- and a C-flute, the B-flute being 3 mm thick and the C-flute 4 mm thick, resulting in a total thickness of 7 mm for the blank 3.

The blank 3 has a tab 4 at the end, which is separated from the eight rectangular, equally sized side surfaces 5-12 by a groove 13 parallel to the end. The eight side surfaces 5-12 of the base 2 are separated by parallel grooves 14-20.

The blank 3 has a continuous groove 21 perpendicular to the parallel grooves 13 - 20.

Essentially rectangular, long bottom flaps 22, 23 are provided on the first and fifth side surfaces 5, 9. Essentially square, short bottom flaps 24, 25, 26, 27 are provided on the second, fourth, sixth and eighth side surfaces 6, 8, 10, 12, one side of which adjoins the vertical groove 21 forms an angle of approximately 45° or approximately 135° with the vertical groove 21.

Essentially hexagonal bottom flaps 28, 29 are provided on the third and seventh side surfaces 7, 11, two of which are attached to the vertical sides of the

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enclose an angle of approximately 45° and approximately 13 5° with the vertical groove 21.

Retaining elements in the form of a small flap 30, 31 are provided on the hexagonal bottom flaps 27, 29, which are essentially formed by grooves 32 and two vertical notches 33, 34 in the hexagonal bottom flap 28, 29 at the free ends facing away from the vertical groove 21.

The flaps 30, 31 are provided with semicircular punchings 35 for the discharge of bulk material.

Reference is made to Fig. 2 below. A lid 42 of an octagonal, isosceles packaging unit 1 is pre-punched in the form of a blank 43 from the above-mentioned two-layer corrugated cardboard.

The blank 43 has a tab 44 at the end, which is separated from the eight rectangular, equally sized side surfaces 45 - 52 by a groove 53 parallel to the end. The eight side surfaces 45 - 52 of the lid 42 are separated by parallel grooves 54 - 60.

The blank 43 has a continuous groove 61 perpendicular to the parallel grooves 53 - 60.

Essentially rectangular, long cover flaps 62, 63 are provided on the first and fifth side surfaces 45, 49. Essentially square, short cover flaps 64, 65, 66, 67 are provided on the second, fourth, sixth and eighth side surfaces 46, 48, 50, 52, one side of which adjoins the vertical groove 61 forms an angle of approximately 45° or approximately 135° with ^the vertical groove ^61. The cover flaps 47, 51 are

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Each of the lid flaps 68, 69 is provided with substantially hexagonal sides, two of which adjacent to the vertical groove 61 each form an angle of approximately 45° and approximately 135° with the vertical groove 61.

At the free ends of the essentially rectangular, long cover flaps 62, 63, elongated punched holes 75, 76 designed as slots are provided as part of the retaining elements.

Complementary retaining elements 70, 71 are provided on the hexagonal cover flaps 68, 69, which are designed as essentially rectangular grooves 72 of the hexagonal cover flaps 68, 69 at the free ends facing away from the vertical groove 61. Pairs of grooves 73, 74 in the essentially rectangular groove 72, which taper conically towards the free end, form retaining elements 77, 78 shaped as tongues, which are complementary to the elongated punched holes 75, 76 forming slots.

Fig. 3 shows a spatial view of a packaging unit 1 which is composed of the base 2 and the lid 42. The lid 42 has a slightly larger inner diameter than the outer diameter of the base 2, so that the lid 42 can be put coaxially over the base. The cross section of the octagonal packaging unit 1 is, for example, 1200 mm and the height 1800 mm.

Fig. 4 shows an alternative blank 79 for the lid of the octagonal packaging 1. The blank 79 essentially corresponds to the blank 43 for the lid 42. Corresponding features are designated with the reference numerals from Fig. 2. Only the deviations from the blank 43 according to Fig. 2 are described.

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Retaining elements 87, 88 are provided at the free ends of the essentially rectangular, long cover flaps 62, 63, which are provided with stepped grooves 80, 81, 82, 83. In continuation of the grooves 82, 83, grooves 84, 85 run parallel to the long sides of the cover flaps 62, 63. The grooves 82, 83 are connected at the ends directed towards the vertical groove 61 to a groove 86 parallel to the vertical groove.

The hexagonal lid flaps 91, 92 are shorter in length than half the diameter of the lid 79 of the octagonal packaging 1, namely by half the distance between the grooves 84 and 85. This serves to fix the hexagonal lid flaps 91, 92, as described below.

The procedure for assembling the octagonal packaging unit 1 is described below.

First, the blanks 3, 43 are each folded into a ring and closed by gluing and pressing the tabs 4, 44 to the opposite side surfaces 12, 52 and/or stapling them and/or fixing them with a tape.

Separately, the base 2 and the cover 42 are provided with an octagonal cross-section by first pivoting the essentially hexagonal base and cover flaps 28, 29, 68, 69 towards each other, preferably by slightly more than 90°, into the interior of the ring and pivoting the side surfaces 5 12 and 45 - 52 around the 8 grooves 13 - 20 and 53 - 60, respectively, until the side surfaces 6, 8, 10, 12, 46, 48, 50 and 52 rest in pairs on the shaping sides of the essentially hexagonal base and cover flaps 28, 29, 68, 69. :* : :..*

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Then, the essentially square, short base and cover flaps 24 - 27 and 64 - 67 are each pivoted towards each other by preferably approximately 90° into the interior of the ring and finally, the essentially rectangular, long base and cover flaps 22, 23, 62 and 63 are each pivoted towards each other by preferably approximately 90° into the interior of the ring.

The free ends of the rectangular, long bottom flaps 22, 23 are inserted under the small flaps 30, 31 of the essentially hexagonal bottom flaps 28, 29 and are thereby fixed so that all bottom flaps 22 - 29 are held in the closed position.

The tongues 77, 78 on the lid 42 are pressed inwards until they sink into the slots 75, 76 in the long lid flaps 62, 63. The tongues 77, 78 and the slots 75, 76 block each other, thereby fixing them. This also holds all the lid flaps 62 - 69 in the closed position.

The lid 79 is erected largely in the same way as the lid 42. Unlike the lid 42, however, the side flaps 89, 90 on the retaining elements 87, 88 are pivoted inwards by at least 90° around the grooves 84, 85. The retaining elements 87, 88 are then inserted under the essentially hexagonal lid flaps 91, 92. The side flaps 89, 90 are now pivoted back from below around the grooves 84, 85. They thus come into contact with the inside of the essentially hexagonal lid flaps 91, 92. In this way, the lid flaps 91, 92 and the long rectangular flaps 61, 62 are fixed in the closed position.

Claims (12)

1. Packaging unit ( 1 ) a) with a base ( 2 ) and a lid ( 42 ) made of separately prefabricated blanks ( 3 , 43 ), each of which can be folded and closed separately and parallel to a common central axis of the base ( 2 ) and lid ( 42 ) to form a closed ring, b) wherein the blanks ( 3 , 43 ) for the lid ( 42 ) and the base ( 2 ) are each provided with eight parallel grooves (13-20, 53-60) parallel to the common central axis and one groove ( 21 , 61 ) perpendicular to the common central axis, c) wherein eight side surfaces ( 5-12 ) in the cut ( 3 ) of the base ( 2 ) and eight side surfaces ( 45-52 ) in the cut ( 43 ) of the lid ( 42 ) are defined by two adjacent grooves, d) the blanks each have at least four bottom and cover flaps ( 22-29 , 62-69 ) which are arranged in extension of the side surfaces and are pivotable about the grooves ( 21 , 61 ) perpendicular to the common central axis, e) wherein the bottom and lid flaps ( 28 , 29 , 68 , 69 ) in extension of the third and seventh side surfaces ( 7 , 11 , 47 , 51 ) are substantially hexagonal and define the shapes of the packaging unit ( 1 ), and f) wherein retaining elements ( 30 , 31 , 70 , 71 ) are provided which can fix the hexagonal base and cover flaps ( 28 , 29 , 68 , 69 ) in their position. 2. Packaging unit ( 1 ) according to the preceding claim, characterized in that substantially rectangular, long bottom and lid flaps ( 22 , 23 , 62 , 63 ) are provided on the first and fifth side surfaces ( 5 , 9 , 45 , 49 ). 3. Packaging unit ( 1 ) according to the preceding claim, characterized in that the substantially rectangular, long base and lid flaps ( 22 , 23 , 62 , 63 ) are as long as the substantially hexagonal base and lid flaps ( 28 , 29 , 68 , 69 ). 4. Packaging unit ( 1 ) according to one of the preceding claims, characterized in that substantially square, short bottom and lid flaps ( 24-27 , 64-67 ) are provided on the second, fourth, sixth and eighth side surfaces ( 6 , 8 , 10 , 12 , 46 , 48 , 50 , 52 ). 5. Packaging unit ( 1 ) according to the preceding claim, characterized in that the essentially square, short bottom and lid flaps ( 24-27 , 64-67 ) each have a side adjacent to the vertical groove ( 21 , 61 ) which encloses an angle of approximately 45° or approximately 135° with the vertical groove ( 21 , 61 ). 6. Packaging unit ( 1 ) according to one of the preceding claims, characterized in that two sides of the substantially hexagonal bottom and lid flaps ( 28 , 29 , 68 , 69 ) each enclose an angle of approximately 45° and approximately 135° with the vertical groove ( 21 , 61 ) and their lengths are substantially equal to the width of a side surface (5-12, 45-52). 7. Packaging unit ( 1 ) according to claim 2, characterized in that the substantially rectangular, long bottom and lid flaps ( 22 , 23 , 62 , 63 ) are provided with grooves on side edges of the free ends facing away from the vertical groove ( 21 , 61 ). 8. Packaging unit ( 1 ) according to claim 2, characterized in that the essentially rectangular, long lid flaps ( 22 , 23 , 62 , 63 ) are provided with elongated punchings ( 75 , 76 ) forming slots as part of the retaining elements in the free ends facing away from the vertical creasing ( 21 , 61 ) and essentially parallel to the side edges. 9. Packaging unit ( 1 ) according to claim 2, characterized in that the essentially rectangular, long bottom flaps ( 22 , 23 , 62 , 63 ) are provided with semicircular punchings ( 35 ) for a discharge device in the free ends facing away from the vertical creasing ( 21 , 61 ), and that the essentially hexagonal bottom and lid flaps ( 28 , 29 ) are provided with semicircular punchings ( 35 ) for a discharge device at the free ends facing away from the vertical creasing ( 21 ). 10. Packaging unit ( 1 ) according to one of the preceding claims, characterized in that the substantially hexagonal bottom flaps ( 28 , 29 ) each have small flaps in the free ends facing away from the vertical scoring ( 21 ), the shape of which is predetermined by two scorings and one scoring. 11. Packaging unit ( 1 ) according to claim 2, characterized in that the essentially rectangular, long base or lid flaps ( 22 , 23 , 62 , 63 ) are provided with elongated punchings forming slots as part of the retaining elements in the free ends facing away from the vertical scoring and essentially parallel to the side edges, and that the essentially hexagonal base or lid flaps ( 28 , 29 , 68 , 69 ) each have a tongue at their free end which can be inserted into the slots and is formed by suitable scorings and scorings in the hexagonal base or lid flaps and tapers towards the free end of the hexagonal base or lid flaps. 12. Packaging unit ( 1 ) according to one of the preceding claims, characterized in that the base ( 2 ) and lid ( 42 ) are designed such that they can be placed concentrically over one another to form a closed packaging with an octagonal cross-section.