JP2001114268A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the resistance of longer side walls to load, and prevent a hinge female section and a hinge male section from being damaged by forming a planar contact section at one section of the contact section between the longer side walls and a bottom section when a folding container is built up, and the longer side walls are vertically erected to the bottom section. SOLUTION: For this folding container, longer side walls 2 and shorter side walls 3, which are arranged in a manner to surround a bottom section 1, can be folded in a manner to be superposed with the bottom section. In such a folding container, when the folding container is built up, and the longer side walls are vertically erected to the bottom section, a planar contact section S is formed at one section of the contact section between the longer side walls and the bottom section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding container which can be folded so that a side wall disposed so as to surround a bottom portion overlaps the bottom portion.

[0002]

2. Description of the Related Art Conventionally, a long side wall connected to an opposing long side of a rectangular bottom through an appropriate hinge, and an opposing short side of the above-mentioned bottom also via an appropriate hinge. Foldable containers with connected short side walls are known, in which, in the folded state, the short side wall is folded over the bottom, the long side wall is further folded thereon, and the container is folded. By setting the long side wall in the folded state perpendicular to the bottom and then setting the short side wall in the folded state perpendicular to the bottom,
It is configured to be assembled into a box-shaped folding container.

Hereinafter, the above-mentioned conventional folding container will be described with reference to FIGS. 7 and 8. FIG. In addition, FIGS. 4 to 6 which are perspective views of the folding container of the present invention are used for the description of the assembly and the like of the folding container.

The above-mentioned folding container has a bottom 1 having a rectangular planar shape. The opposite long side 1a of the bottom 1 is connected to a long side wall 2 via a hinge, which will be described later, and the opposite short side 1b of the bottom 1 is also connected via an appropriate hinge. The short side walls 3 are connected.

As shown in FIG. 4, in order to fold the folded container assembled in a box shape, first, the short side wall 3 is folded down inside the folded container, and as shown in FIG. Over the bottom 1 as if
Then, similarly, the long side wall 2 is turned inside out of the folding container, and is overlapped on the bottom 1 and the short side wall 3 as shown in FIG. Conversely, to assemble as shown in FIG. 4 from the folded state shown in FIG. 6, the long side wall 2, which is overlaid on the bottom 1 and the short side wall 3, is set upright. Then, the short side wall 3 is set upright, and the folding container is assembled in a box shape.

It is to be noted that the short side wall 3 of the folded container in the assembled state does not easily fall down inside.
Engaging portion 2 for engaging left and right ends of long side wall 2 and short side wall 3
a, 3a are formed at both left and right end portions of the long side wall 2 and the short side wall 3. Such engaging portions 2a, 3a are already known before the filing of the present application (for example, JP-A-6-1342). And JP-A-8-318939).
Detailed description is omitted.

Next, the hinge connection between the bottom 1 and the long side wall 2 will be described with reference to FIG.

The bottom 1 is formed along a long side of a bottom plate 1c having a cross rib 1c 'vertically provided on a lower surface thereof, and a bottom plate 1c.
A substantially inverted U-shaped double wall 1d constituting the above-described long side 1a, and the above-described short side formed along the short side of the bottom plate 1c and having a lower height than the double wall 1d. And a peripheral wall 1e on the upper surface of the horizontal wall 1d1 of the double wall portion 1d.
Are formed.

On the upper surface of the horizontal wall 1d1 of the double wall 1d,
The inverted J-shaped hinge female portion H1 is formed at a predetermined interval in the longitudinal direction of the double wall portion 1d. Hinge female part H
Reference numeral 1 denotes a strip h1 extending upward along the inner wall 1d2 constituting the double wall 1d, and a semi-cylindrical hook connected to the strip h1 and extending in the direction of the peripheral wall 1e. H2, and the hinge female portion H1 is
e is located below the upper end. This hinge female part H1
Has an appropriate elasticity by integrally molding the bottom 1 with a synthetic resin.

The long side wall 2 has a horizontally long rectangular plate-like portion 2b.
And a lower horizontal frame 2c extending outward from the lower end of the plate-like portion 2b. The lower horizontal frame 2c has a lower surface corresponding to the hinge female portion H1 formed on the bottom 1 on the lower surface. , A hinge male portion H2 is formed. The hinge male part H2 is hung from the lower surface of the lower horizontal frame 2c, and includes a pair of vertical pieces h3 perpendicular to the plate-like part 2b and a horizontal pin h4 disposed between the pair of vertical pieces h3. The lower part of the vertical piece h3 is formed as a semicircular part h3 ′. Also,
The opposing vertical piece h3 of the adjacent hinge male part H2 is a vertical part 2 formed as a downward extension of the plate-like part 2b.
d 'and a semi-cylindrical portion 2d "connected to the vertical portion 2d' and are connected by a connecting wall 2d.
The lower end of d is aligned with the lower end of the vertical piece h3 of the male hinge part H2, and the semi-cylindrical part 2d ″ of the connecting wall 2d and the vertical piece h3
Has substantially the same radius as the lower semicircular portion h3 '. 2b 'is a reinforcing vertical rib formed on the outer surface of the plate-like portion 2b as required.

The diameter of the horizontal pin h4 of the male hinge part H2 formed on the long side wall 2 is defined between the peripheral wall 1e of the bottom part 1 and the hook part h2 of the hinge female part H1 formed on the bottom part 1.
A narrow gap is formed.

When the horizontal pin h4 of the hinge male part H2 formed on the long side wall 2 is forcibly inserted into the gap formed between the peripheral wall 1e of the bottom part 1 and the hook part h2 of the hinge female part H1, the hinge The strip portion h1 of the female portion H1 is tilted inward. Therefore, a gap through which the horizontal pin h4 of the male male portion H2 passes between the peripheral wall 1e of the bottom portion 1 and the hook portion h2 of the hinge female portion H1. The horizontal pin h4 can be connected to the hinge female part H1.
Is pushed down to below the hook portion h2. Then, the strip part h1 of the hinge female part H1 returns to the original position by the elastic force of the strip part h1 itself, and the hinge male part H2
Is fitted into the concave portion h2 'of the hook portion h2 of the hinge female portion H1, and the hinge female portion H1 formed on the bottom portion 1 and the hinge male portion H2 formed on the long side wall 2 form: The bottom 1 and the long side wall 2 are hinged. The bottom portion 1 and the short side wall 3 are similarly connected by hinge connection between the hinge female portion H1 and the hinge male portion H2.

[0013]

In the above-mentioned conventional folding container, the long side wall 2 in the folded state is used.
Can be assembled in a box-shaped folding container by standing upright on the bottom 1 and then standing the short side wall 3 in the folded state perpendicular to the bottom 1,
In the state assembled in this manner, the bottom 1
The semi-cylindrical portion 2d "of the connecting wall 2d formed on the long side wall 2 and the semicircular portion h3 'of the vertical piece h3 of the male hinge portion H2 are placed on the horizontal wall 1d1 of the double wall portion 1d. become,
Therefore, the bottom 1 and the long side wall 2 are in line contact, not surface contact. The lower surface of the lower horizontal portion 2c formed on the long side wall 2 and the upper end of the peripheral wall 1e formed on the bottom portion 1 are configured to contact or approach each other when the folding container is assembled. Have been.

As described above, when the folding container is assembled, the semi-cylindrical portion 2d "of the connecting wall 2d is placed on the horizontal wall 1d1 of the double wall portion 1b of the bottom portion 1 and the hinge is provided. The semicircular portion h of the vertical piece h3 of the male portion H2
3 ′ is placed, and accordingly, the horizontal wall 1d1 of the double wall 1e of the bottom 1 and the connecting wall 2d formed on the long side wall 2 and the vertical piece h3 of the hinge male portion H2 are in contact with each other. It is a line contact, not a contact. Thus, the double wall 1 of the bottom 1
e, a horizontal wall 1d1 and a connecting wall 2d formed on the long side wall 2.
Since the vertical piece h3 of the hinge male part H2 is in line contact with the vertical piece h3, when a load is applied to the long side wall 2 as in the case where a large number of folding containers accommodating articles are stacked, the length is long. The side wall 2 is located on the plate-like portion 2 b of the long side wall 2.
It is easy to move in the right angle direction, and the contact between the lower horizontal portion 2c of the long side wall 2 and the peripheral wall 1e of the bottom portion 1 easily comes off.
The load applied to the long side wall 2 is applied to the hinge joint portion composed of the hinge female portion H1 and the hinge male portion H2, and the hinge female portion H
1 and the hinge male portion H2 are damaged.

An object of the present invention is to solve the problems of the above-mentioned conventional folding container.

[0016]

According to the present invention, in order to achieve the above-mentioned object, firstly, a long side wall and a short side wall arranged so as to surround a bottom portion are folded so as to overlap the bottom portion. When the folding container is assembled and the long side wall is set upright with respect to the bottom, a surface contact portion is formed at a part of the contact portion between the long side wall and the bottom. Second, when the folding container is assembled, from the upper end of the long side wall,
The upper end of the short side wall is made lower.

[0017]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it exceeds the gist of the present invention. The same reference numerals are used for the same components as those of the above-described conventional folding container, including the hinge female portion H1 and the hinge male portion H2, and the detailed description thereof is omitted.

According to the present invention, when assembling the above-mentioned conventional folding container, the horizontal wall 1d1 of the double wall 1e of the bottom 1 and the vertical pieces of the connecting wall 2d and the male hinge H2 formed on the long side wall 2 are provided. By adding a configuration that makes a partial surface contact to the line contact with h3, it is intended to bear most of the load applied to the long side wall 2 at this surface contact portion.

In this embodiment, a vertical wall 2e is formed to extend substantially vertically downward near both ends of the lower horizontal frame 2c formed on the long side wall 2, and further formed at the lower end of the vertical wall 2e. Then, a horizontal frame 2f extending in the direction of the plate-like portion 2b is connected.
When the folding container is assembled and the long side wall 2 is set upright with respect to the bottom 1, the horizontal frames 2 f formed near both ends of the lower horizontal frame 2 c provided on the long side wall 2 are formed. , On the horizontal wall 1d1 of the double wall 1e of the bottom 1. Thus, by forming the surface contact portion S including the vertical wall 2e and the horizontal frame 2f near the lower corner of the long side wall 2, the load applied to the long side wall 2 is borne by the surface contact portion S. Thus, the load applied to the hinge connecting portion composed of the hinge female portion H1 and the hinge male portion H2 is reduced to prevent the hinge female portion H1 and the hinge male portion H2 from being damaged.

Assembling the folding container, the bottom 1
On the other hand, when the long side wall 2 stands upright, the horizontal wall 1d1 of the double wall portion 1e of the bottom portion 1, that is, the surface contact portion S formed on the long side wall 2 to make surface contact with the upper surface of the bottom portion 1. Is not limited to the embodiment formed near the lower corner of the long side wall 2 as described above, but can be formed near both lower end portions of the long side wall 2 or formed near the lower corner. In addition to the formed surface contact portion S, it can be formed at the center of the long side wall 2.
Plural pieces can be formed between the surface contact portions S formed near the lower corner. In particular, it is desirable to form the surface contact portion S at the corner of the bottom 1 in terms of strength.

In this embodiment, as shown in FIG. 3, when the folding container is assembled, the upper end 3 'of the short side wall 3 is slightly larger than the upper end 2' of the long side wall 2. It is configured to be low. With this configuration, when a load is applied to the folding containers from above, such as when a large number of folding containers each containing articles are stacked, the bottom portion 1 and the surface contact portion S make surface contact. Long wall 2
Since most of the load is applied to the surface contact portion S
Is not formed, and no load is applied to the short side wall 3 that is weak against the load. Therefore, the hinge connecting portion composed of the hinge female portion H1 and the hinge male portion H2 that hinge connects the bottom portion 1 and the short side wall 3 is formed. Such a load is reduced, so that the hinge female portion H1 and the hinge male portion H2 that hinge-join the bottom portion 1 and the short side wall 3 are not damaged.

[0022]

Since the present invention has the above-described structure, the following effects can be obtained.

When the folding container is assembled and the long side wall is set upright with respect to the bottom, a surface contact portion is formed in a part of the contact portion between the long side wall and the bottom. It is possible to prevent the resistance to the load from being increased, and thus prevent the hinge female portion and the hinge male portion from being damaged.

When the folding container is assembled, the upper end of the short side wall is configured to be lower than the upper end of the long side wall, so that no surface contact portion is formed.
A load is not applied to the short side wall that is weak against the load, and therefore, it is possible to prevent the hinge female portion and the hinge male portion that hinge-join the bottom portion and the short side wall from being damaged.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of a bottom portion and a long side wall of a folding container according to the present invention.

FIG. 2 is a vertical cross-sectional view of the folding container of the present invention near the bottom and the end of the long side wall.

FIG. 3 is a vertical sectional view along a short side wall of the folding container of the present invention.

FIG. 4 is a perspective view of the assembled state of the folding container.

FIG. 5 is a perspective view showing a state in which the folding container is being assembled.

FIG. 6 is a perspective view of the folding container in a folded state.

FIG. 7 is a partially exploded perspective view of a bottom portion and a long side wall for explaining hinge connection of a conventional folding container.

FIG. 8 is a vertical sectional view of a bottom portion and a long side wall of a conventional folding container.

[Explanation of symbols]

 H1 ... Hinge female part H2 ... Hinge male part S ... Face contact part 1 ... Bottom 2 ... ... Long side wall 3 ・ ・ ・ ・ ・ ・ ・ ・ Short side wall

Claims (2)

[Claims] 1. A folding container having a long side wall and a short side wall disposed so as to surround a bottom portion, wherein the long side wall is perpendicular to the bottom portion by assembling the folding container. A folding container wherein a surface contact portion is formed at a part of a contact portion between a long side wall and a bottom portion when standing. 2. The folding container according to claim 1, wherein the upper end of the short side wall is lower than the upper end of the long side wall when the folding container is assembled.