DE29701873U1 - Shipping box - Google Patents

Description

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KT 668

Corrugated cardboard factory Kunert & Söhne GmbH & Co. 97616 Bad Neustadt/Saale

Description

Transport box

The invention relates to a transport box with a base and side walls made of corrugated cardboard.

Transport boxes made of corrugated cardboard are known in various designs. For example, DE-GM 296 07 050 describes a foldable and erectable transport box made of corrugated cardboard. Its base area corresponds to the size of a standard pallet and is attached to a pallet. As a stacking aid, strips of corrugated cardboard are proposed on the lid of the box, which are intended to make it easier to slide the next pallet on top in an aligned manner. Such a stacking aid is not suitable for transport boxes without a lid. There is also no idea there of making transport boxes of different formats stackable.

In transport logistics, it is desired that a supplier sends a number of different, larger and smaller components, sorted, to a processing plant as a palletizable transport unit, whereby in the processing plant when placing them in a warehouse or when making them available at a work station

no re-sorting work should be required. This inevitably means that different containers must be stacked in the transport unit according to their volume. After delivery, each container and its contents should be able to be placed in a warehouse, for example a high-bay warehouse, or made available at a work station. Due to the often high weight of the components, such as screws, and due to the stacked shipping and/or stacked storage, the containers must be dimensionally stable. They should not slip against each other when stacked.

According to the state of the art, plastic boxes of different formats that can be stacked in different arrangements are used to solve the above problem. However, such plastic boxes have the disadvantage that they are comparatively expensive, heavy and difficult to recycle. In addition, the costs for transporting empty plastic boxes to the company that is to fill them are high, especially because they cannot be folded like transport boxes made of corrugated cardboard. Collapsible plastic boxes are also known. However, the folding mechanisms are unreliable and expensive and limit stackability and stability.

The object of the invention is to propose a transport container of the type mentioned at the beginning made of corrugated cardboard, whereby the transport containers should be able to be stably stacked with similar transport containers of different formats and slipping of the transport containers in the stack should be avoided.

According to the invention, the above object is achieved by the features of the characterizing part of claim 1. The bases of the plastic part fixed to the corrugated cardboard base, which is in particular a deep-drawn part made of recycled plastic fulfill two functions. Firstly, when the transport box is on a pallet or surface, they form

is set up, support surfaces that keep the corrugated cardboard floor at a distance from the surface so that any moisture from the surface cannot penetrate into the corrugated cardboard of the floor. On the other hand, when the transport boxes are stacked, they form lateral stops for the side walls of the next box below by engaging between its side walls so that the stacked transport boxes, even in the different formats, are stacked on top of each other, aligned against each other and cannot slip horizontally unintentionally.

Because the bases are arranged in the same grid pattern for all transport box formats, the different transport box formats can be stacked in various combinations, either overlapping or not, whereby for overlapping stacking the mutual distances between the bases are equal to or slightly greater than twice the thickness of the side walls. Another advantage is that it is not necessary to provide separate lids for each transport box. When stacked, the upper transport boxes cover the lower ones.

Empty transport boxes can be sent cost-effectively when folded flat together with the also flat plastic part, from which only the base protrudes, to a company that can easily unfold and fill them when the plastic part is attached.

The transport box described consists mainly of corrugated cardboard, in particular double-layer corrugated cardboard. The proportion of the plastic part is small in terms of volume and weight. The transport box is therefore comparatively light in terms of weight and cheap to produce. In addition, it is easily recyclable as corrugated cardboard after the plastic part has been removed.

The plastic part itself is also easily recyclable.

Further advantages, particularly with regard to the stability of the transport box and the loadability, arise from the subclaims and the following description. The closed design of the base and the side walls ensures that even small, sharp-edged components poured into the transport box cannot migrate out through the corrugated cardboard or slots.

Embodiments of the invention are described below. In the drawing:

Figure 1 shows a flat corrugated cardboard blank for folding a small format transport box,

Figure 2 shows a flat corrugated cardboard blank for folding a transport box of medium size, small height,

Figure 3 shows a flat white cardboard blank for folding a transport box of medium size, larger height,

Figure 4 shows a flat corrugated cardboard blank for folding a large format transport box - reduced in size compared to Figures 1 to 3 -,

Figure 5 a plastic part with bases for the large format transport box in top view,

Figure 6 the plastic part in side view,

Figure 7 is a perspective view of the partially folded large format transport carton,

Figure 8 is a perspective view of the finished folded large format transport box with

inserted plastic part,

Figure 9 is a perspective view of the inside of the transport box,

Figure 10 shows another corrugated cardboard blank for a transport box, where the plastic part is to be glued to the bottom,

Figure 11 shows a stacking example of large, medium and small format transport cartons,

Figure 12 shows an example of stacking the transport cartons on a standard pallet,

Figure 13 shows an alternative embodiment of a plastic part according to Fig.5 and

Figure 14 shows an alternative design of the retaining flap according to a corrugated cardboard blank corresponding to Fig.2.

The flat corrugated cardboard blanks of the various formats have folding flaps (d to 4) that merge into side surfaces (5 to 8) via pairs of scoring and pinion lines (l.l, 2.1, 3.1, 4.1). Clamping bevels (2.2 and 4.2) are designed on the folding flaps (2,4). The side surfaces (5 to 8) are continuously connected to one another at folding edges (5.1, 6.1, 7.1). A nose (5.2) is formed on the free edge of the side surface (5), to which a recess (8.2) of the free edge of the side surface (8) is assigned. When the free edges are put together, the nose (5.2) engages in the recess (8.2), thereby achieving alignment of the side surfaces (5,8). The free edges can be connected using an adhesive strip. The narrow side surfaces (6,8) have handle openings (6.3,8.3).

On the longer side surface (5) there is an inner

Bottom flap (9) is formed. On the narrower side surfaces (6, 8) there are outer bottom flaps (10, 11) which are essentially half the size of the inner bottom flap (9). On the side surface (7) there is a retaining flap (12) which is essentially the size of the inner bottom flap (9). The retaining flap (12) is provided with square openings (12.1) distributed in a grid pattern which serve to push through the bases of the plastic part described in more detail below.

The small format (Fig. 1) has six openings (12.1). The medium format (Fig. 2, 3) has twelve openings. The large format (Fig. 4) has twenty-four openings. All openings (12.1) are the same size and equally spaced; for reasons of clarity, the openings (12.1) in Fig. 4 are smaller than those shown in Figs. 1 to 3.

An insertion tab (13) with projections (13.1) and a slot (13.2) is formed on the retaining flap (12) according to Fig. 1. The insertion tab (13) is assigned notches (10.1, 11.1) in the outer bottom flaps (10, 11) and an opening (14) in the inner bottom flap (9). A projection (14.1) is formed in the opening (14) for engagement in the slot (13.2).

On the inner bottom flap (9), on its free edge opposite the opening (14), a nose (15) is provided, which serves to engage in a receptacle (16) formed on the side surface (7).

In the large format (see Fig.4), two insertion tabs13) and openings(14) are provided next to each other. In the medium format and the large format (see Fig.2,3,4), two lugs(15) and two additional side insertion tabs17) are arranged on the inner bottom flap(9) to further connect the retaining flap(12), to which cuts(18) of the

inner bottom flap (9) and recesses (19) of the side surfaces (6,8).

It is a plastic part, especially deep-drawn

(20) is provided, on which bases (21) are formed in a grid pattern, which, like the openings (12.1), have a square base area of, for example, about 60 mm x 60 mm. The plastic part (20) can be made from a PS regenerate and have a wall thickness of about 1.5 mm. To stabilize the bases (21), recesses (21.1) are designed on them. To prevent water from accumulating in the bases, they have openings (21.2). The bases (21) have essentially the same distances (a) (see Fig.5, 6), whereby the distance (a) corresponds approximately to twice the wall thickness (b) (see Fig.9) of a side wall, which consists of a side surface (5 to 8) and the respective folding flap (1 to 4) folded onto it, or is slightly larger. The distances (c) of the outer bases from the outer edges of the plastic part are approximately half as large as the distances (a). The height (h) of the bases (21) is greater than the wall thickness of the corrugated cardboard used for the cutting. It is, for example, approximately 15 mm.

Between the bases (21) the plastic part (20) forms flat webs (20.1). For the large format (see Fig.5,6) a plastic part (20) with twenty-four bases (21) is provided. Accordingly, for the medium format a plastic part (20) with twelve bases (21) is provided and for the small format a plastic part (20) with six bases

(21). The smaller plastic parts can be formed simply by halving or quartering plastic parts with twenty-four bases. Conversely, it is also possible to form a plastic part with twenty-four bases or twelve bases by placing plastic parts with six bases next to each other during assembly.

The bases (21) and the openings (12.1) can have the same base area. To increase the stability of the insertion tabs (13), especially when they are bent, it is advantageous to make the openings (12.2) closest to the insertion tabs (13) smaller than the others so that more corrugated cardboard remains in the border area (see Fig. 14). The associated bases (21') are then shaped accordingly smaller so that they fit through the openings (12.2) (see Fig. 13). For reasons of symmetry and in particular so that the plastic part (20) can also be inserted rotated by 180° in its plane, the openings (12.2') and the bases (21') on the opposite sides are also designed (see Fig. 13, 14).

Figure 13 shows the plastic part (20) intended for the box according to Figure 4, if the two openings near the two insertion tabs (13) and the symmetrical openings on the opposite side are designed to be small.

Figure 14 shows the corrugated cardboard blank for which a plastic part with twelve bases is intended, whereby the four bases associated with the openings (12.2,12.2*) are smaller than the others.

The method of assembling the transport boxes with the corrugated cardboard cuts of different formats is essentially the same and is as follows:

After cutting or punching the blank and preparing the folding and scoring lines, the edges are placed together with the tabs (5.2) and recesses (8.2) and connected with an adhesive strip.

In the flat state, the transport box with the plastic part can now be shipped. To set up the

In transport boxes, the side surfaces (5 to 8) are made into a rectangular shape and the inner bottom flap (9) is folded over by 90, whereby its nose or noses (15) snap into the receptacle (16) or receptacles (16). Then the outer bottom flaps (10, 11) are swung onto the inner bottom flap (9). This state of the bottom flaps is shown in Fig.7.

The plastic part (20) is then placed on the retaining flap (12) so that its base (21) protrudes downwards through the openings (12.1). The insertion tab(s) (13) is then bent over and pressed past the cuts (10.1, 11.1) into the opening(s) (14), whereby the projections (13.1) engage with this/these and the projection(s) (14.1) engage with the slot(s) (13.2). If necessary, the additional insertion tabs (17) are simultaneously engaged with the cuts (18) or the recesses (19) in a similar manner. The bottom flap (9, 10, 11) and the retaining flap (12) are thus held together in a dimensionally stable manner on the side surfaces (5, 6) and the plastic part (20) is fixed to the bottom without adhesive, with its webs (20.1) between the retaining flap (12) and the outer bottom flap (10, 11) being fixed vertically and it being held horizontally immovably to the bottom by means of its base (21) located in the openings (12.1). This state is shown in Fig. 8.

Finally, the folding flaps (l, 2, 3, 4) are swung inwards by about 180° around the scoring lines (l.l, 2.1, 3.1, 4.1) to the side surfaces (5 to 8). The folding flaps (l to 4) then stand on the inner bottom flap^). They cover the insertion tabs (13 or 13, 17) and the handle openings (6.3, 8.3) on the inside (see Fig. 9). Preferably, the folding flaps (2, 4) are swung inwards with the clamping bevels (2.2, 4.2) towards the folding flaps (l, 3), so that between

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the impact flaps (1 to 4) a clamping occurs.

The side surfaces (5 to 8) and the folding flaps (1 to 4) adjacent to them together form a side wall, so that the side wall thickness is twice as large as the thickness of the corrugated cardboard blank. At the same time, the upper edges (22) formed by the scoring lines (l.l to 4.1) form a comparatively wide (width b) dimensionally stable support for stacking the transport boxes (see Fig. 9).

Figure 8 shows the large format transport box in its finished state. To erect the transport box, a sequence of steps other than the one described above can be selected. In any case, the transport box can be easily erected from the flat state in preparation for filling, without the need for glue or other connecting means, such as clamps. The erected transport boxes can be moved individually or in a stack without losing their shape, even when they are filled with heavy components. In particular, they are also tightly closed on the inside by the folding flaps (1 to 4) and the directly adjacent continuous inner bottom flap (9), so that even smaller, poured components can practically not wander into cracks or gaps.

The transport boxes of the same or different formats can be stacked in a wide variety of arrangements. It is possible to arrange larger formats of transport boxes in a stack so that they overlap below or above smaller formats. In an overlapping arrangement, two adjacent bases of an upper transport box each reach over a side wall of the next lower transport box, whereby these bases form stops against horizontal displacement. In addition, the bases (21) - then the respective outer

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Bases - even when arranged in a non-overlapping arrangement, stops to prevent horizontal movement, with the outer bases resting tightly against the inside of the side walls of the lower transport box.

When the transport boxes are placed individually, the bases form support surfaces with their bases such that the filled transport box can be placed on a storage area or a pallet without the base bending under the weight of the filling. The bases (21) have the additional advantage that they keep the corrugated cardboard at a distance from the storage area or pallet so that moisture from the storage area or pallet cannot penetrate the corrugated cardboard. Moisture that collects in the bases for any reason can migrate downwards through the openings (21.2).

The transport box can be easily recycled separately. To do this, the retaining flap (12) is swung away from the base and then the plastic part (20) is removed. The corrugated cardboard and the plastic part (20) can then be recycled separately.

Figure 10 shows a corrugated cardboard blank for an alternative design of the transport box. There is no retaining flap (12) for the plastic part here. The side surfaces (5, 8) can be glued with a tab (23). A bottom flap (10', 11', 12') is formed on each side surface (5 to 8), with the bottom flaps each taking up half of the base area of the transport box in pairs. The plastic part (20) described of a corresponding size can be attached to the outer bottom flaps (9', 11') by gluing or needling. In addition, a transport box made from the blank according to Figure 10 also has the advantages described above in terms of stability, fillability and stackability.

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Figure 11 shows, for example, a stack with a large format transport box (F4) (see Fig.4), a medium format transport box with a large height (F3) (see Fig.3), a medium format transport box with a smaller height (F2) (see Fig.2) and two small format transport boxes (Fl) (see Fig.1). The two transport boxes (F3, F2) are placed on the transport box (F4), whereby they together take up the base area of the transport box (F4) and are held securely in place with their bases between the side walls of the transport box (F4). Two transport boxes (Fl) are placed on the transport box (F2), which in turn only have half the base area of the transport box (F2 or F3). The transport boxes (Fl) are held securely in place with their bases between the side walls of the transport box (F2). The transport box (F4) is as high as the transport box (F3) and twice as high as the transport boxes (F2, Fl),

In the stacking example according to Figure 12, which shows an incomplete stack, two transport boxes of format (F4) are placed on a standard pallet (24). Two transport boxes of format (F3) are placed on one of these. In addition, two transport boxes of format (F2) are placed on the pallet (24) next to one of the transport boxes of format (F4). Next to the other transport box (F4) are two transport boxes of format (Fl). In addition to these, there is still space on the pallet (24) to place two further transport boxes of format (Fl) or one transport box of format (F2 or F3). This stacking of the formats shows that the large format corresponds to a quarter of the base area of the standard pallet (24) and the formats (F2, F3) each take up half the base area of the format (F4) and the format (Fl) in turn takes up half the base area of the format (F2 or F3).

F3), the most varied combinations are possible. The height of the transport boxes (F3) is equal to the height of the transport boxes (F4). The height of the transport boxes (Fl, F2) corresponds to half the height of the transport boxes (F3, F4). Overall, it is therefore possible to stack the transport boxes on a pallet (24) in different combinations according to the respective requirements, so that different components in different shades can be shipped together on a pallet in a single stack.

Claims (25)

Protection claims transport box 1. Transport box with bottom and side walls made of corrugated cardboard, characterized, that at least one plastic part (20) is arranged on the base (9 to 12), that a plurality of bases (21) are formed on the plastic part (20), which are distributed in a grid pattern over the base and which protrude downwards from the base, the bases (21) being suitable on the one hand as support surfaces and on the other hand as stops against horizontal displacement of stacked transport boxes. 2. Transport carton according to claim 1, characterized in that the mutual distances (a) of the bases (21) are equal to or slightly larger than twice the side wall thickness (b). 3. Transport carton according to one of the preceding claims, characterized, that the bases (21) on the outside of the floor have a distance (c) from the edges of the floor that corresponds approximately to the side wall thickness (b). 4. Transport carton according to one of the preceding claims, characterized, that the bases (21) have the same base areas and the same heights (h). 5. Transport carton according to one of the preceding claims, characterized, that the bases (21) have an approximately square base. 6. Transport carton according to one of the preceding claims, characterized, that the height (h) of the base (21) is greater than the thickness of the corrugated cardboard. 7. Transport carton according to one of the preceding claims, characterized, that the height (h) of the base (21) is smaller than one edge of its base. 8. Transport carton according to one of the preceding claims, characterized, that an opening (21.2) is provided on the base of the base (21) as a water drain. 9. Transport carton according to one of the preceding claims, characterized, that a recess (21.1) projecting to the ground is formed on the base surface of the base (21). 10. Transport carton according to one of the preceding claims, characterized, that the plastic part having the base (21) is a deep-drawn part. 11. Transport carton according to one of the preceding Expectations, characterized in that the plastic part (20) is attached to the bottom of the corrugated cardboard base by gluing or by means of mechanical connecting elements. 12. Transport box according to one of the preceding claims 1 to 10, characterized in that in the bottom area of the transport box a retaining flap (12) made of corrugated cardboard is formed, on which at least one opening (12.1) is formed through which the bases (21) of the plastic part (20) protrude downwards, wherein webs (20.1) of the plastic part (20) existing between the bases (21) are fixed between the base flap(s) (10, 11) and the retaining flap (12). 13. Transport box according to claim 12, characterized in that the retaining flap (12) has a separate opening (12.1) for each base (21). 14. Transport carton according to one of the preceding claims, characterized in that the openings (12.1) are dimensioned such that the plastic part is held horizontally immovably on the floor by means of its base (21). 15. Transport carton according to one of the preceding claims, characterized in that the retaining flap (12) engages in the bottom flap (9) by means of at least one insertion tab (13, 17) and is fixed to the bottom. 16. Transport carton according to one of the preceding claims, characterized in that an inner bottom flap (9) occupies the base area of the transport carton and two outer bottom flaps (10, 11) jointly occupy the base area of the bottom. 17. Transport box according to one of the preceding claims, characterized in that the insertion tab (13) has a slot (13.2) into which a projection (14.1) of an opening (14) engages, through which the insertion tab (13) can be inserted. 18. Transport box according to one of the preceding claims, characterized in that the insertion tab (13) has projections (13.1) which lock on the opening (14) into which it can be inserted. 19. Transport box according to one of the preceding claims, characterized in that at least one lug (15) is provided on the bottom flap (9), which engages in a receptacle (16) of a side surface (7). 20. Transport box according to one of the preceding claims, characterized in that the four side surfaces (5 to 8) in the corrugated cardboard blank are continuous and that a nose (5.2) and a corresponding recess (8.2) are formed on the two free edges for aligned connection by means of an adhesive strip. 21. Transport box according to one of the preceding claims, characterized in that folding flaps (1 to 4) are provided on the side walls (5 to 8) to cover and stabilize them. 22. Transport carton according to one of the preceding claims, characterized in that the folding flaps (1 to 4) extend to the bottom flap (9) and together with the side surfaces (5 to 8) form the side walls. 23. Transport carton according to one of the preceding claims, characterized in that the folding flaps (1 to 4) are at least partially provided with clamping slopes (2.2, 4.2). 24. Transport carton according to one of the preceding claims, characterized in that handle openings (6.3, 8.3) are formed on at least two opposite side surfaces (6, 8). 25. Transport carton according to one of the preceding claims, characterized in that the opening (12.2) closest to the insertion tab (13) is smaller than the others and the base (21') associated with this opening (12.2) is also correspondingly smaller than the other bases (21).