JPS6340742B2 - - Google Patents

Abstract

1. A stackable container (1) which has been erected from a blank and which has a quadrilateral container floor (2) which is surrounded on all sides by an upwardly conically opening container wall which, in its corner regions, has triangular fold portions (8-14) which extend from the corners (7) of the container floor (2) and which, partly over themselves and partly over quadrilateral wall regions (3, 4, 5, 6) disposed therebetween, form transitional portions between these wall regions which are folded so as to comprise three layers of material, characterized in that seven fold portions (8-14) are provided in each corner region, adjacent fold margins (17, 21 ; 20, 24 ; 23, 27) being contiguous, and in that the container (1) has a capacity of at least 56 litres.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stackable container manufactured from a blank by folding the same, and more particularly, to a stackable container manufactured by folding the same from a blank.
A wall that surrounds the entire circumference of the bottom and spreads upward, and a triangular bent surface having a common tip located at each corner of the bottom and at the connection point between the bottom and the two walls are triple-folded. The present invention relates to a container consisting of four transitions formed between walls. Note that the blank refers to a piece of material having a predetermined shape and size.

This type of container typically has three triangular folds at each corner. However, such three triangular bent surfaces do not provide high stability. Therefore, conventional containers are usually provided with a bend or similar reinforcement at the top end. For example, in the description of known containers in German Patent Publication No. 1810600 and US Pat. No. 3,536,248, it is said that the container can be used stably without bending or reinforcing the upper end, but specific examples described in detail The top edge is bent. Of course, such bent ends not only complicate the manufacture and construction of the container, but also the size of the container cannot structurally exceed a certain small capacity.

The object of the invention is to provide a container of the above type which is simple in construction and stable enough, even if relatively large, to store liquids and other easily flowing bulk substances.

To achieve this objective, according to the present invention, seven triangular folding surfaces are arranged at each corner, and after the folding surfaces are triple-folded, the inner or outer surface of one folding surface is It is characterized in that the two bent ends located anywhere are in contact with each other.

Thus, an important advantage of the present invention is that by using seven folded surfaces, the stability of the container can be maximized. As in the known container, it is only triple-folded, but the stability is improved mainly due to the large number of bent ends. Improving the stability of this corner (transition) is very important for filled containers. Stack the filled containers on top of the first container,
Pressure is applied to the corner, but if the pressure cannot be withstood at the corner, it is distributed to the adjacent side surfaces by the bent ends and overlapping layers. In addition, by increasing the number of bends, it is possible to provide even more elasticity to the corner portions. Of course, the corners must be stable,
It needs to be somewhat elastic so that it does not get damaged by small impacts. This elasticity is provided by slightly opening the bends at the corners.

The seven folded surfaces are triple-folded to form a transition section, in which case the folded edges of the folded surfaces contact each other at two locations on the inside of the container and at one location on the outside of the container. ing. It is therefore very difficult for filling material to penetrate behind the transition from this point of contact. This prevents the transition from yielding or being damaged.

The containers according to the invention can also be manufactured relatively large from paper or cardboard. Paper or cardboard is an acceptable container material for storing many chemicals when plastics or metals are not suitable, so the present invention provides a simple solution, preferably made from paper or cardboard. A container is provided, the container being suitable for storing corrosive chemicals. However, this container is very stable and reliable, which is required when storing the chemicals mentioned above. Further, as an advantage of the container of the present invention, it is possible to bend the container along a straight line in a relatively simple manner, so that the container of the present invention can be manufactured by mechanically bending the container.

The containers of the invention are preferably made of paper or cardboard, but may also be made of other materials such as plastic or metal.

When manufacturing with cardboard, it is advantageous to use multilayer cardboard, since the stability is greatly increased. The container is formed, for example, by folding the size in a multilayer cardboard after it has hardened. However, if the size is bent before it hardens, no further gluing is required to maintain a stable fold after removal of bending pressure or tools. In particular, it has been found advantageous to manufacture containers from five-layer cardboard. In particular, suitable materials include strong paperboard (Scandinavian quality kraftboard).
kraftboard) or soda paper (soda
paper). In order to obtain a particularly suitable container for the given purpose, the thickness of each layer of material should be approximately 300 g/m ²
and should be 0.5mm. The layers can be adhered with polyvinyl alcohol sizing or dispersion or melt adhesives, which have been found to be particularly suitable. Of course, other adhesives can also be used.

An advantage of the container according to the invention is that it can be fully utilized in cases of at least 56 volumes. The 56 capacity fully exploits the advantages of the container according to the invention and also meets packaging standards. Of course, it can also be conveniently used as a container with a capacity of more than 56.

To increase the stability of the container and protect the top end, the top end can be provided with a flanged metal strip, preferably about 8 mm thick. Of course, the strip also prevents the contacting bent ends from opening.

It is also possible to provide parallel inwardly projecting beads or corrugations below the upper end, thereby further increasing stability. In addition, if the container is provided with a lid, this protrusion can form a support surface for the lid, fixing the lid to the container and preventing its movement. Additionally, a sheet member can be provided between the lid and the protruding corrugated portion.

The contents can be sealed by securing the lid with a clamp ring. The container can also be sealed in a conventional manner.

Such lids are primarily manufactured from wood, board, metal, plastic, paper or similar materials. Alternatively, the lid may be a somewhat smaller second container that fits over the top of the large capacity container of the invention and rests on the protruding corrugations. This would greatly increase the capacity of the container.

The containers of the invention have been found to be very stable and can withstand up to three times their own weight and fill weight if made of five layers of tough paperboard (Scandinavian quality kraftboard) of the thickness mentioned. I can do it.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the container of the present invention, and FIG. 2 is a plan view of a blank (cardboard) used for manufacturing the container of the present invention, in which the folding lines of the cardboard are shown by solid lines. 3 is a sectional view taken along the plane of FIG. 1, and FIG. 4 is a sectional view taken along the plane of FIG. 1.

In the drawing, the container 1 has a bottom 2 and four walls 3.
~6. The bent surfaces 8 to 14 form an acute triangle, extend from the tip 7 of the bottom portion 2, and widen toward the upper end.

FIG. 2 depicts a blank with folding lines, with folding surfaces 8-14 shown. The solid line indicates the folded line,
The broken line indicates the position of the bent end after bending. In the folded state, the wall portion 3 is bent approximately 90° upward in the drawing along the folding line 15. Wall portions 4, 5 and 6 are also bent in the same manner. The first to seventh bending surfaces 8 to 14 are bent as follows. The first folding surface 8 is bent outward along the solid line 17 so that the solid line 18 is located on the back side of the broken line 16. Next, the second folding surface 9 is bent inward along the solid line 18 so that the broken line 19 is aligned below the solid line 17. Next, the third bent surface 10 is bent inward along the solid line 20, and the solid line 21
Align it on the broken line 19. Next, the fourth bent surface 11 is bent outward along the solid line 21, and the broken line 22 at the center thereof is aligned with the upper side of the bent end 20. Next, the fifth
Bend the bent surface 12 outward along the solid line 23,
The solid line 24 is aligned below the center broken line 22 of the folded surface 11. Next, the sixth folding surface 13 is folded inward along the solid line 24, and the broken line 25 is bent inside the folding surface 11.
Align it with the lower side of the bent end 23 of. Next, the seventh folding surface 14 is bent inward along the solid line 26, and the solid line 27 is aligned with the broken line 25. Next, the wall portion 6 is bent along the solid line 27, and the broken line 2 is placed on the folding line 26.
Match 8.

FIG. 3 shows a cross section in the folded state. In the drawing, the container material has four layers. As mentioned above, five layer materials are particularly advantageous, although fewer or more layers may be used. In all cases, the bends at the transitions between walls are tripled with multilayer material. As shown at positions 29, 30 and 31, the two folded ends 1 are formed on the inner surface of the second folded surface 9.
7 and 21 are in contact with each other (position 29), the two folded ends 23 and 27 are in contact with each other on the inner surface of the sixth folding surface 13 (position 30), and the two folded ends 23 and 27 are in contact with each other on the outer surface of the fourth folding surface 11. Curved ends 20 and 24 touch each other (position 31). It is therefore ensured that no filler material can penetrate behind the transition from this contact point.

In FIG. 4, there is a metal strip 32 at the top of the container.
is fixed and bent in a U-shape around the end. Also, the metal strip 32 and the container wall 5
An inward corrugation is formed at position 33, and the corrugation extends parallel to the entire upper end. This wavy portion 33
provides a support surface for the lid 34. The lid 34 has a seal 35 at its end, which is fitted into the lid 34 at position 36. A clamp ring 37 is installed across the upper end, one end of which fits into the corrugations 33, while the other end extends over the lid 34 to firmly hold the lid 34. in this way,
By closing it, it is possible to prevent the contents from leaking out.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of the container of the present invention;
The figure is a plan view of the cardboard used to manufacture the container of figure 1, figure 3 is a sectional view taken along the plane of figure 1, and figure 4 is a sectional view taken along the plane of figure 1. Attachment: 1...Container, 2...Bottom, 3-6...Wall, 7
... Tip, 8-14 ... Bending surface (transition part).

Claims (1)

[Scope of Claims] 1. Manufactured by bending a blank, a bottom portion 2, walls 3, 4, 5, 6 that surround the entire circumference of the bottom portion 2 and extend upward, and each corner of the bottom portion 2. 4 formed between the wall parts by folding seven triangular bent surfaces 8 to 14 having a common tip 7 three times over each other and located at the connection point between the bottom part 2 and the two wall parts. In the stackable container 1 consisting of two transition parts, two folds located on the inner surface of the second folding surface 9 are in a state after the first to seventh seven triangular folding surfaces 8 to 14 are folded. ends 17 and 21, two bent ends 20 and 24 located on the outer surface of the fourth bent surface 11, and the sixth bent surface 1
Stackable container, characterized in that the two folded ends 23 and 27 located on the inner side of 3 are in contact with each other and have a capacity of at least 56. 2. The container according to paragraph 1, which is manufactured from cardboard. 3. A container according to paragraph 1 or 2, which is manufactured from multilayer cardboard. 4. The container according to item 3, which is manufactured by bending the sizing agent in the multilayer cardboard before it hardens. 5. A container according to any one of clauses 1 to 4, which is manufactured from a five-layer cardboard. 6. The container according to any one of items 1 to 5, which is manufactured from tough paper board or soda paper. 7. A container according to clause 6, wherein the material thickness of each layer is approximately 300 g/m ² and 0.5 mm. 8 A third layer in which each layer is adhered with a polyvinyl alcohol sizing agent or a dispersion or melt adhesive.
The container according to any one of Items 7 to 7. 9 Flanged metal strip 32 at the top of the container
9. The container according to any one of Items 1 to 8, having: 10. The container according to item 9, wherein the metal strip has a thickness of about 0.8 mm. 11. The container according to item 9 or 10, which has a bead or wave-shaped portion 33 that projects inward in parallel to the lower part of the upper end of the container. 12. The container according to any one of Items 1 to 11, which has a lid 34. 13 Bead or wavy portion 33 from which the lid 34 protrudes
A container according to paragraph 11 or paragraph 12 above. 14 Lid 34 and protruding bead or corrugation 33
14. The container according to claim 13, wherein a sealing member 35 is provided in between. 15. The container according to any one of items 12 to 14, wherein the lid 34 is fixed with a clamp ring 37. 16 a first container whose lid 34 is a second, somewhat smaller container;
The container according to any one of Items 3 to 15.