JPH0230932B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in reinforced containers and sleeves. More particularly, the invention relates to containers suitable for containing liquids or other free-flowing materials such as granules or powders (with plastic liners in the case of liquids), but the invention is not limited thereto. It is not something that will be done.

[Prior art and problems to be solved]

Corrugated containers for liquid and dry free-flowing materials are well known. However, to provide the necessary strength to resist the expansion that occurs within the walls of the container,
Such containers have traditionally been made in an octagonal shape. In this case, the lid for the container must be made separately. This is because the container flap cannot be made to close the container. This increases the cost of the container and makes it difficult to transport the container in a folded state since the lid is made separately.

The object of the invention is to provide a reinforced container or sleeve which is resistant to expansion and has good vertical or axial compressive strength and which can be closed at both ends by integral flaps. It is to provide.

[Means to solve the problem]

To achieve the above object, a container according to the present invention includes eight rectangular panels for forming a central portion of the container with at least a substantially octagonal cross section, and eight rectangular panels forming upper and lower portions of the container and substantially rectangular end portions of the container. a rigid material body including shaped panels integrally interconnected at adjacent edges via triangular panels respectively along the upper and lower edges of said rectangular panels for forming a container end; each shaped panel consists of connected rectangular flaps along the ends of the shaped panels, the included angle of the triangular panels adjacent the flaps being substantially less than 90° such that the container ends are separated from the connected rectangular panels. It is characterized by being configured to slope inwardly or outwardly to increase the resistance to bulge and the axial compressive strength of the container.

When using the invention as a reinforcing sleeve, no closure flap is required.

If the ends of the container are generally square, the slotted closure flaps can be arranged to close substantially the entire area of each end of the container. If the ends of the container are other than square, one pair of flaps will completely close the ends of the container, but the other pair of flaps will not completely close the ends of the container.

In a preferred embodiment of the invention, the central portion is a regular or irregular octagon and the edges of the container are square.

If desired, the container or sleeve of the present invention can be constructed from polystyrene or other desirable plastic material in the shape described above. However, the most important advantage is that the container is made of cardboard,
Obtained when made from cardboard or rigid paperboard (hereinafter collectively referred to as "paperboard").

In a particularly preferred embodiment of the invention, the middle part of the container is octagonal. This is because this profile is the most symmetrical and can be conveniently formed by punching, scribing, and creasing an essentially rectangular shape from paperboard. The central part of the octagon is formed by eight panels,
These panels are formed by fold lines. Each panel has additional shaped panels extending from opposite sides of the panel forming converging portions of the container. In a preferred embodiment, the alternating additional panels all extend inwardly toward the ends of the container, while the panels between said additional panels extend outwardly toward the ends of the container. This panel arrangement provides a form of "interlocking" structure which increases the stiffness of the container sufficiently to resist bulge due to internal pressure of the container and contributes significantly to the vertical compressive strength of the container. .

The panels of the container forming the central part of the octagon are preferably greater in height than they are wide, the additional panels extending inwards are preferably trapezoidal, while the additional panels extending outwards are preferably trapezoidal. The shape of is preferably triangular. The triangular panels formed between each trapezoidal panel may have an included angle with the flap of substantially less than 90°, preferably about 45°. To complete the container, one end of the blank or shape plate is punched out to match the shape of the fold at the other end of the shape, and the remaining portion of the shape plate extending from this fold follows the shape at the other end. It is glued to the outside or inside surface of the board, thereby creating a suitable connection.

[Examples and effects]

Particularly preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings.

First of all, in FIG. 1 of the drawings, the shape of the profile forming the container of the invention is clearly shown. The shape plate size of FIG. 1 is for one particular embodiment of the invention and can be varied to create containers of other desired sizes. For example, although the illustrated shapes form containers with square ends, the invention is equally applicable to differently sized containers with rectangular ends. however,
The arrangement shown in the drawings is preferred. This arrangement is the most practical and economical for containers having the dimensions illustrated. The broken lines shown in FIG. 1 represent fold lines formed by scoring or the like.

The profile plate shown in Figure 1 has four regularly slotted edge flaps 1 to 1 on each side of it.
4 and 5 to 8, and one end of the plate is punched out at position 9 in a shape corresponding to the fold line 10 at the other end on the opposite side. The portion 11 extending from the fold line 10 is coated with glue on its inner surface and glued to the outer surface of the shape plate at the other end. In this case, the punched out part 9 is aligned with the fold line 10. Otherwise, the glue will be removed from the above part 11.
and this outer surface is glued to the inner surface of the shape plate.

Fold lines are 8 central rectangular panels 12-19
, and these panels form the central portion of the octagon when the shape plate is upright as shown in FIG. These fold lines also form triangular panels 20-27 extending from either side of central panels 12, 14, 16 and 18.
formed one by one. Similarly, four panels 28-35 extend from each side of central panels 13, 15, 17 and 19, sharing sides with adjacent triangular panels. Other fold lines 36 and 37 are provided to facilitate folding of the forming plate as shown in FIG. 2 of the drawings.

As shown in Figures 3 to 6 of the drawings, when the container is upright, the trapezoidal panels 28-35 extend inwardly from the central panels 13, 15, 17 and 19 toward the ends of the container, while the triangular Panels 20-27
extend outwardly from central panels 12, 14, 16 and 18 toward each corner of the end of the container.

As discussed above, the inward and outward slopes of adjacent panels combine to provide an "entwined" structure that provides vertical compressive strength and expansion stiffness for the container. In addition to increasing the rigidity of the container compared to known octagonal containers, this arrangement provides distinct advantages over the integral edge flaps of standard construction. When used as a reinforcing sleeve, the edge flaps are naturally removed.

Although the octagonal shape of the central portion is preferable for the reasons mentioned above, the present invention provides a hexagonal central portion or two thereof.
The same applies to shapes with double angles.

If the container is completely closed, ie flaps are provided at both ends of the container, the outermost flaps are secured by adhesive tape or tear tape to facilitate opening. If the container is used to contain a liquid, a polyethylene or similar plastic bag may be provided inside the container in any suitable manner. If desired, a dispensing valve similar to that provided on wine barrels can be provided.

If the reinforcing sleeve is to be placed inside another container, quick gluing is omitted.

〔Effect of the invention〕

The container of the present invention having the above structure is configured such that the upper and lower end surfaces of the container are formed by combining a trapezoidal panel and a triangular panel to form an uneven surface. It exhibits strong resistance against bulges that occur inside the container. At the same time, the trapezoidal panel makes the container end opening a stable shape, and the triangular panel strengthens the corner of the container opening formed by the trapezoidal panel and fixes the flaps closing the top and bottom surfaces of the container, so that the lateral direction of the fluid flows. It has a strong resistance not only to the movement of the steel but also to the flow in the axial direction. Furthermore, this configuration makes the container of the invention strong against external axial compression.

[Brief explanation of drawings]

Figure 1 is a plan view of the form plates forming the container, Figure 2 is a perspective view of the container in the folded position, Figure 3 is a perspective view of the container in the upright position, and Figure 4 is a view of the container from one end. 5 and 6 are side views taken in the direction of arrows 5 and 6, respectively, in FIG. 4. 1 to 8...Flap, 10, 11, 36, 37...
Fold line, 12-19...Rectangular panel, 20-2
7...Triangular panel, 28-35...Trapezoidal panel.

Claims (1)

[Scope of Claims] 1. Eight rectangular panels for forming a center portion of a container having at least a substantially octagonal cross section, and eight rectangular panels for forming an upper and lower portion of the container and an end portion of the container having a substantially rectangular shape. a rigid material body comprising shaped panels integrally interconnected at adjacent edges via triangular panels along the upper and lower edges of each rectangular panel, and an end of each shaped panel for closing the container end; consisting of rectangular flaps connected along the sides, and the included angle of the triangular panel adjacent the flaps is substantially less than 90° so that the container end is directed inwardly or outwardly from the connected rectangular panels. A container configured to be sloped to increase resistance to bulge and axial compressive strength of the container. 2. A claim in which each of the triangular panels is configured to slope outwardly from the connecting rectangular panel toward the container end, and the shaped panels are configured to slope inwardly from the connecting rectangular panel toward the container end. The container according to item 1 in the scope of . 3. The container according to claim 1 or 2, wherein the height of the rectangular panel is longer than the circumferential width of the central portion of the container. 4. The body is formed of a blank of rigid sheet material that has been creased to form the panel, the blank being punched at one end to match the shape of the fold near the other end, and the blank being punched at one end to match the shape of the fold near the other end an extension extending from the fold of the blank, the extension being adapted to be adhered to the outer surface of the blank adjacent the stamped end to complete the container. The container according to item 1. 5. The container according to any one of claims 1 to 4, which has an equilateral octagonal shape at the center of the container and a quadrangular shape at the ends of the container. 6. A container according to any one of claims 1 to 5, wherein the body is formed from corrugated paperboard. 7. A container according to any one of claims 1 to 6, wherein the included angle is approximately 45°.