DE7020786U - FOLDABLE CONTAINER. - Google Patents

Description

Schweizeriscne Aluminum AG, Chippis, Switzerland

"Zusanunenl: collapsible container"

Priority: June 3, 1969 Switzerland No. 8392/69

The innovation relates to a collapsible container consisting of a bottom part and which can be opened and closed Side panels.

Such containers, usually called collapsible boxes, are known in the field of goods handling. You have opposite the common crates and cardboard boxes have the advantage that they can be folded up to form a flat structure when empty and so require a lot of space for storage or empty transport. They are made from a wide variety of materials such as wood, corrugated cardboard, metal, plastic. In many cases it is also desired that these containers reusable, and this must be taken into account when choosing the material. Not just ground, Side walls and cover must be designed accordingly, but especially the joint parts that make up the 'walls connect and which are heavily used after repeated use.

With the exception of cardboard boxes, which are usually made of a one-piece blank at least bottom and side walls are formed, these parts must be used for containers made of other materials with the help of special devices, such as hinges, are connected. This complicates it and makes production more expensive. On the other hand, folding boxes have the disadvantage of being material-related lower resistance and thus a shorter service life.

The present innovation combines the advantage of the simpler manufacture of the cardboard folding boxes with the greater resistance of the wooden, metal or plastic containers Plastic core layer and a top layer made of metal on at least one side of the core layer, the top layer (or top layers) being excluded in the area of the folds and the core layer having the thickness necessary for flexibility. The bottom and side parts outside the Folds consist entirely of the composite material , or only the zones bordering the folds can consist of it, in which case the cover layer (or the cover layers) with their from the fold

Line facing away from the edges protrudes over the core layer and engages over the edges of tarel-shaped elements adjoining the composite material zone.

The thermoplastics have a high flexibility and flexural fatigue strength, provided they are sufficient Are thin »In the case of the new, collapsible container, the plastic core layer is accordingly formed the articulated connection between the floor and the side panels in the required thickness. It can be a continuously equally strong, flexible core layer, or the core layer can be a v / isse

Have a thickness that makes them difficult to bend and only Ϊ

be thinned to the thickness required for folding at the fold. In the latter case, the backing

th can be kept thinner; the flexural rigidity outside the fold is then provided by the plastic-metal composite conditional, while in the former case only the cover layers provide the flexural rigidity.

The core layer can be provided with a cover layer on both sides or only on one side. As plastics for the Core layer for forming the joint are all flexible plastics, e.g. polyvinyl chloride, polyamides and especially polyolefins, especially polypropylene and polyethylene. The thickness of a polypropylene core layer at the fold, depending on the bending radius and

Il ff

the flexibility is now around 0.2-0.8. The core layer and thus also the fold can be strengthened by inserting a fiber fabric varstrength thrower ;.

The attached drawing explains the innovation in terms of an example. Show it

Fig. 1 and 2 in cross section, two embodiments the fait,

Fig. 5 is a plan view of a blank for a collapsible Container,

4 shows a collapsible container gsschlcs = sen in section,

Fig. 5-7, on a larger scale, different designs Fa It s te lie A in Fig. 4 *

According to Fig. 1, the container 1 is on both sides of the fold 4 consistently made of a composite material that is composed of the core layer 2 and the two cover layers 3, E.g. from a 2 - 8 mm thick polypropylene plate and two 0.5 - 0.8 mm thick cover sheets made of aluminum or one Aluminum alloy. At the fold 4, the cover sheets 5 have been removed and the core layer is 0.2 0.8 thick tapered mm.

Fig. 2 shows an embodiment in which only the joint part 5 in the area of the fold 4 made of the composite material made up of core layer 2 and cover layers 3

consists. This separate joint part 5 forms the container wall with the plates 6. The plates 6 are between the edges 7 of the cover layers 3 protruding beyond the core layer 2 are inserted and glued or bonded to them connected in a different way. The plate 6 can be, for example, a metal, plastic or composite plate.

3 and 4 show a folding box for transporting goods. It consists of a blank made of composite material which is provided with folds 4, so that a bottom 8 and four hinged wall parts 9 arise. A ring can be used to fix the erected wall parts 9 of the box be laid around, or, as shown in Fig. 4, a lid 10 can be placed on the filled box, the is provided with grooves 11 for attaching to the wall parts, which thereby in their erected position be fixed. The wall parts can be folded inwards or outwards for stacking or transport when empty so that a flat, space-saving structure is created.

There are various possibilities for the construction of the composite material, examples of which are shown in FIGS. 5-7 * as enlarged folds A of the box according to FIG. 4. According to Fig. 5, the composite material consists of the foldable plastic core layer 2a, which is on one side with a rigid cover sheet Yes. is equipped. That

Cover plate is at the folding point *; 4 separated by a cut. According to FIG. 6, the foldable core layer 2b is covered on both sides with rigid cover sheets 3b. The composite material according to Fig. 7 has a thicker, non-foldable core layer 2c, which is on both sides with a thinner Metal sheet 3c is covered. At the fold 4 are the Cut out metal sheets and notch the core layer so that it is foldable at the notch location.

The metal layer (or the metal layers) at the fold can be removed, for example, by milling away. the The core layer at the fold can also be tapered by milling away the plastic or by thermoplastic Pressing between two punches can be achieved. Depending on the function, the taper can be in V, U or another Form can be formed.

Claims (3)

Protection claims 1. Collapsible container consisting of a bottom part and side parts that can be opened and closed, characterized in that it is at least at the folds (4) Adjacent zones made from a composite material made from a thermoplastic core layer (2) and a cover layer (j5) made of metal on at least one side of the core layer (2), wherein the cover layer (or the cover layers) is excluded in the area of the folds (4) and the Core layer (2) has the thickness necessary for flexibility. 2. Collapsible container according to claim 1, characterized characterized in that the bottom (8) and side parts (9) outside the folds (4) are made entirely of the composite material exist. 3. Collapsible container according to claim 1, characterized characterized in that only the zones adjacent to the folds (4) consist of the composite material, wherein the top layer (or the top layers) (3) with j over their edges (7) facing away from the fold line the core layer (2) protrudes and the edges from > te 1 ft 1 · · I t · · the composite material zone adjoining tabular Elements (6) overlaps.