JP4124929B2 - Folding container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding container that can be folded so that a side wall disposed so as to surround the bottom portion overlaps the bottom portion.
[0002]
[Prior art]
Conventionally, a long side wall connected to an opposing long side portion of a rectangular bottom portion via an appropriate hinge portion, and a short side wall connected to an opposing short side portion of the bottom portion via an appropriate hinge portion. In the folded state, the folding container is folded so that the short side wall is superimposed on the bottom, and further, the long side wall is folded on the folded side. The side wall is set up vertically to the bottom, and then the folded short side wall is set up vertically to the bottom so as to be assembled into a box-type folding container.
[0003]
Below, the conventional folding container mentioned above is demonstrated using FIG.7 and FIG.8. Note that FIGS. 4 to 6, which are perspective views of the folding container of the present invention, are used for the description of the assembly of the folding container.
[0004]
The folding container described above has a bottom portion 1 whose planar shape is rectangular. A long side wall 2 is connected to a long side portion 1a opposite to the bottom portion 1 via a hinge portion, which will be described later, and a short side portion 1b opposite to the bottom portion 1 is similarly connected to a long side portion 1a via a suitable hinge portion. The short side wall 3 is connected.
[0005]
As shown in FIG. 4, in order to fold the folding container assembled in a box shape, first, the short side wall 3 is brought down inside the folding container, as shown in FIG. , Over the bottom 1. Then, similarly, the long side wall 2 is brought down inside the folding container and is superimposed on the bottom 1 and the short side wall 3 as shown in FIG. Conversely, to assemble from the folded state shown in FIG. 6 as shown in FIG. 4, the long side wall 2 in a state of being overlaid on the bottom 1 and the short side wall 3 is set up vertically. Then, the short side wall 3 is set up vertically to assemble the folding container into a box shape.
[0006]
Engaging portions 2a and 3a that engage the left and right ends of the long side wall 2 and the short side wall 3 are provided so that the short side wall 3 of the folded container in the assembled state does not easily fall inside. 2 and the short side wall 3 are formed at both left and right end portions. Such engaging portions 2a and 3a are already well known before the application of the present application (for example, Japanese Patent Laid-Open Nos. 6-1342 and 8-318939). Therefore, detailed description thereof is omitted.
[0007]
Next, the hinge coupling between the bottom 1 and the long side wall 2 will be described with reference to FIG.
[0008]
The bottom portion 1 is a substantially inverted U-shaped double wall that forms the above-described long side portion 1a formed along the long side of the bottom plate 1c with the cross rib 1c 'suspended from the lower surface and the bottom plate 1c. Part 1d and the above-mentioned short side part 1b formed along the short side of the bottom plate 1c and having a height lower than that of the double wall part 1d, and the horizontal wall 1d1 of the double wall part 1d A peripheral wall 1e is formed on the upper surface.
[0009]
On the upper surface of the horizontal wall 1d1 of the double wall 1d, an inverted J-shaped female female portion H1 is formed at a predetermined interval in the longitudinal direction of the double wall 1d. The hinge female portion H1 extends upward along the inner wall 1d2 constituting the double wall portion 1d, and is connected to the strip portion h1 and a semi-cylinder extending in the direction of the peripheral wall 1e. The hinge female portion H1 is located below the upper end of the peripheral wall 1e. The hinge female portion H1 has appropriate elasticity by integrally forming the bottom portion 1 with a synthetic resin.
[0010]
The long side wall 2 has a horizontally long plate-like portion 2b and a lower horizontal frame 2c extending outward from the lower end of the plate-like portion 2b. On the lower surface of the lower horizontal frame 2c, A hinge male portion H2 is formed corresponding to the hinge female portion H1 formed on the bottom portion 1. The hinge male part H2 is suspended 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 ′. The adjacent vertical piece h3 of the adjacent male male portion H2 includes a vertical portion 2d ′ formed as an extension downward of the plate-like portion 2b, and a semi-cylindrical portion 2d ″ connected to the vertical portion 2d ′. The lower end of the connection wall 2d coincides with the lower end of the vertical piece h3 of the hinge male part H2, and the semi-cylindrical part 2d "of the connection wall 2d and the vertical piece h3 are connected. The lower semicircular portion h3 ′ has substantially the same radius. Note that 2b ′ is a reinforcing vertical rib formed on the outer surface of the plate-like portion 2b as necessary.
[0011]
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 gap having a narrower interval than the diameter of the horizontal pin h4 of the hinge male part H2 formed on the long side wall 2 is provided. Is formed.
[0012]
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 female part H1 is inserted. Therefore, a gap through which the horizontal pin h4 of the male male part H2 passes is formed between the peripheral wall 1e of the bottom part 1 and the hook part h2 of the female hinge part H1, so that the horizontal part h1 is horizontal. The pin h4 is pushed down to the lower side of the hook part h2 of the hinge female part H1. Then, the strip part h1 of the hinge female part H1 is returned to its original position by the elastic force of the strip part h1 itself, and the horizontal pin h4 of the hinge male part H2 is connected to the hook part h2 of the hinge female part H1. The bottom portion 1 and the long side wall 2 are hinge-coupled to each other by the hinge female portion H1 formed on the bottom portion 1 and the hinge male portion H2 formed on the long side wall 2 by being fitted in the recess h2 ′. . Similarly, the bottom portion 1 and the short side wall 3 are configured to be coupled by hinge coupling between the hinge female portion H1 and the hinge male portion H2.
[0013]
[Problems to be solved by the invention]
In the conventional folding container described above, the folded long side wall 2 stands vertically with respect to the bottom 1, and then the folded short side wall 3 stands vertically with respect to the bottom 1. The box-shaped folding container is assembled. In this assembled state, the horizontal wall 1d1 of the double wall 1d of the bottom 1 has a semi-cylinder of the connecting wall 2d formed on the long side wall 2. The semicircular part h3 ′ of the vertical piece h3 of the part 2d ″ and the male male part H2 is placed, so that the bottom part 1 and the long side wall 2 are not in surface contact but in line contact. The bottom 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. Has been.
[0014]
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 male portion H2 is also mounted. Accordingly, the semicircular part h3 ′ of the vertical piece h3 is placed, and accordingly, the horizontal wall 1d1 of the double wall part 1e of the bottom part 1, the connecting wall 2d formed on the long side wall 2, and the hinge male part H2 The vertical piece h3 is not a surface contact but a line contact, thus, the horizontal wall 1d1 of the double wall portion 1e of the bottom 1, the connecting wall 2d formed on the long side wall 2, and the hinge male portion H2. Since the vertical piece h3 is in line contact, when a load is applied to the long side wall 2 such as when a large number of folding containers containing articles are stacked, the long side wall 2 becomes long. It is easy to move in the direction perpendicular to the plate-like portion 2b of the side wall 2, and the long side wall 2 The lower horizontal portion 2c of the bottom portion 1 and the peripheral wall 1e of the bottom portion 1 are easily disengaged, and the load applied to the long side wall 2 is applied to the hinge coupling portion composed of the hinge female portion H1 and the hinge male portion H2. There was a problem that the female part H1 and the hinge male part H2 were damaged.
[0015]
An object of the present invention is to solve the problems of the above-described conventional folding container.
[0016]
[Means for Solving the Problems]
The present invention, in order to achieve the above object, the long side wall and short side wall disposed so as to surround the bottom, the folding container can be folded so as to overlap the bottom portion, lower horizontal formed long side wall The horizontal frame is connected to the lower end of the vertical wall formed by extending the both ends of the frame substantially vertically downward, and when the long side wall is set up vertically with respect to the bottom, The horizontal frame formed near both ends of the lower horizontal frame of the long side wall is placed on the horizontal wall constituting the double wall portion of the bottom, and is formed on the horizontal frame and the bottom formed on the long side wall. Further, the horizontal wall is configured to form a surface contact portion, and when the folding container is assembled, the upper end of the short side wall is lower than the upper end of the long side wall. It is a thing.
[0017]
【Example】
Examples of the present invention will be described below. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded. In addition, about the same part as the component part of the conventional folding container mentioned above including the hinge female part H1, the hinge male part H2, etc., while using the same code | symbol, the detailed description is abbreviate | omitted.
[0018]
The present invention includes a horizontal wall 1d1 of the double wall portion 1e of the bottom portion 1 and a connecting wall 2d formed on the long side wall 2 and a vertical piece h3 of the hinge male portion H2 at the time of assembling the above-described conventional folding container. By adding a configuration in which the surface contact is partially made to the line contact, the surface contact portion tries to bear a large part of the load applied to the long side wall 2.
[0019]
In the present embodiment, the vicinity of both ends of the lower horizontal frame 2c formed on the long side wall 2 extends downward substantially vertically to form a vertical wall 2e, and further, a plate is formed at the lower end of the vertical wall 2e. A horizontal frame 2f extending in the direction of the shape portion 2b is connected. When the folding container is assembled and the long side wall 2 is set up vertically with respect to the bottom 1, the horizontal frame 2f formed near both ends of the lower horizontal frame 2c disposed on the long side wall 2 is provided. The bottom wall 1 is configured to be placed on the horizontal wall 1d1 of the double wall 1e. Thus, by forming the surface contact portion S composed of the vertical wall 2e and the horizontal frame 2f in the vicinity of the lower corner portion of the long side wall 2, a load applied to the long side wall 2 is borne by the surface contact portion S. Thus, the load applied to the hinge coupling portion including the hinge female portion H1 and the hinge male portion H2 is reduced to prevent damage to the hinge female portion H1 and the hinge male portion H2.
[0020]
When the folding container is assembled and the long side wall 2 is set up vertically with respect to the bottom portion 1, the long side wall 2 is in surface contact with the horizontal wall 1 d 1 of the double wall portion 1 e of the bottom portion 1, that is, the top surface of the bottom portion 1. As described above, the surface contact portion S formed in is not limited to the embodiment formed in the vicinity of the lower corner portion of the long side wall 2, and can also be formed in the vicinity of both lower end portions of the long side wall 2. In addition to the surface contact portion S formed in the vicinity of the lower corner portion, a plurality of portions may be formed in the center portion of the long side wall 2 between the surface contact portions S formed in the vicinity of the lower corner portion. You can also In particular, it is desirable in terms of strength to form the surface contact portion S at the corner portion of the bottom portion 1.
[0021]
In the present embodiment, as shown in FIG. 3, the upper end 3 ′ of the short side wall 3 is slightly lower than the upper end 2 ′ of the long side wall 2 when the folding container is assembled. It is configured. With this configuration, when a load is applied to the folding container from above, such as when many folding containers containing articles are stacked, surface contact is made by the bottom 1 and the surface contact portion S. However, since most of the load is applied to the long side wall 2 that is resistant to the load, such a surface contact portion S is not formed, and no load is applied to the short side wall 3 that is weak against the load. The load applied to the hinge coupling portion formed by the hinge female portion H1 and the hinge male portion H2 that are hinged to the side wall 3 is reduced, and accordingly, the hinge female portion H1 that is hinged to the bottom portion 1 and the short side wall 3 is hinged. And the hinge male part H2 is not damaged.
[0022]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be achieved.
[0023]
When the folding container is assembled and the long side wall is set up vertically with respect to the bottom part, a surface contact part is formed at a part of the contact part between the long side wall and the bottom part, so that resistance to the load on the long side wall is formed. Therefore, it is possible to prevent the hinge female part and the hinge male part from being damaged.
[0024]
When the folding container is assembled, the top end of the short side wall is configured to be lower than the top end of the long side wall. Therefore, it is possible to prevent damage to the hinge female portion and the hinge male portion that are hinged to the bottom portion and the short side wall.
[Brief description of the drawings]
FIG. 1 is a partially exploded perspective view of a bottom 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 according to the present invention near the bottom and the end of the long side wall.
FIG. 3 is a vertical cross-sectional view along the short side wall of the folding container of the present invention.
FIG. 4 is a perspective view of the folded container in an assembled state.
FIG. 5 is a perspective view of the folding container during assembly.
FIG. 6 is a perspective view of a folded state of the folding container.
FIG. 7 is a partially exploded perspective view of a bottom portion and a long side wall for explaining a hinge connection of a conventional folding container.
FIG. 8 is a vertical sectional view of a bottom and a long side wall of a conventional folding container.
[Explanation of symbols]
H1 ········ Hinge female portion H2 ···································································· ... long side wall 3 ... short side wall

Claims (1)

In a folding container that can be folded so that the long side wall and the short side wall that are arranged to surround the bottom part overlap the bottom part, the vicinity of both ends of the lower horizontal frame formed on the long side wall extends substantially vertically downward. The horizontal frame is connected to the lower end of the vertical wall formed by being present, and when the long side wall stands upright with respect to the bottom, it is formed near both ends of the lower horizontal frame of the long side wall. The horizontal frame is placed on the horizontal wall constituting the double wall portion of the bottom, and the surface contact portion is formed by the horizontal frame formed on the long side wall and the horizontal wall formed on the bottom. Further, when the folding container is assembled, the folding container is configured such that the upper end of the short side wall is lower than the upper end of the long side wall .

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