JP2001130558A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hinge section connecting the bottom section and the side walls from being damaged when the side walls greatly move to the bottom section by increasing the bonding strength between the bottom section and the side walls, and at the same time, restricting the movement of the side walls to the bottom section. SOLUTION: For this folding container, the side walls 2 and 3, which are arranged to surround the bottom section 1, can be folded in a manner to be superposed with the bottom section. In such a folding container, when the side walls are vertically erected to the bottom section, an engaging protuberance 3r formed on the side wall is fitted in a fitting hole 1n1 formed on the bottom section for the constitution.

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, as an example, a long side wall connected to a long side portion opposite to a rectangular bottom portion via a hinge portion,
Also known is a folding container consisting of a short side wall connected to the opposite short side part of the bottom part via a hinge part.In a folded state, the container is folded so that the short side wall overlaps the bottom part, Further thereon, the long side wall is folded, and the long side wall in the folded state stands upright to the bottom, and then the short side wall in the folded state stands upright to the bottom. By doing
It is configured to be assembled into a box-shaped container.

In the above-mentioned conventional folding container, engagement frames are formed at both ends of the long side wall and both ends of the short side wall, respectively, and the engagement frame formed on the long side wall and the short side wall are formed. The short side wall of the assembled folding container is configured not to fall inward by engaging the engaged engagement frame portion.

[0004]

[Problems to be solved by the invention]

As described above, in the conventional folding container, the engaging frame formed on the long side wall and the engaging frame formed on the short side wall are engaged with each other, so that the assembled folding container is Although the short side wall is prevented from falling inward, there is a problem that the short side wall falls inward due to insufficient engagement.

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

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a folding container capable of folding a side wall disposed so as to surround a bottom portion so as to overlap the bottom portion. On the other hand, when the side wall is set up vertically, the engaging projection formed on the side wall is fitted into the fitting hole formed on the bottom.

[0008]

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.

1 is a bottom portion 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 to the short side via a hinge. 3
Are connected.

As shown in FIG. 1, in order to fold the folded container in a box-shaped state, 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. 1 from the folded state shown in FIG. 3, 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.

Next, the bottom portion 1 will be described mainly with reference to FIGS.

The bottom 1 has a bottom plate 1c.
A substantially inverted U-shaped double wall portion 1d which forms the long side portion 1a of the bottom portion 1 is formed on the long side edge of c. Double wall 1
d comprises an outer wall 1d1, an inner wall 1d2, and a horizontal wall 1d3 connecting the upper end of the outer wall 1d1 and the upper end of the inner wall 1d2, and the bottom plate 1c is located below the lower end 1d1 'of the outer wall 1d1. , Lower end 1 of outer wall 1d1 of bottom plate 1c
The portion located below d1 'constitutes a bottom fitting portion 1' described later. Outer wall 1d constituting double wall 1d
1 is extended upward to form a horizontally long end wall 1e, and a plate-like piece 1f1 extending almost vertically upward from the upper end of the inner wall 1d2 constituting the double wall portion 1d. A substantially semi-cylindrical hook 1f connected to the plate-like piece 1f1 and disposed on the end frame 1e side with respect to the plate-like piece 1f1.
2, a substantially inverted J-shaped hinge female part 1f extends. The hinge female portion 1f is formed at substantially the same height as the end wall 1e, and is formed in an appropriate number along the long side portion 1a (in the present embodiment, at approximately equal intervals, Four hinge female parts 1f are formed.) The outer wall 1d1 and the inner wall 1d2 are provided inside the double wall portion 1d.
Internal reinforcement ribs 1g connecting the horizontal walls 1d3 can be formed at appropriate intervals.

An end wall 1e and a double wall located between a hinge female portion 1f located near both ends of the long side portion 1a and a hinge female portion 1f located closer to the center than the hinge female portion 1f. The corner formed by the horizontal wall 1d3 of the portion 1d has an outer surface 1
A long side locking block 1h is formed in which h1 is substantially flush with the outer surface 1e1 of the end wall 1e. The long side locking block 1h includes a protrusion 1 extending upward beyond the end wall 1e.
h2 and a notch 1 facing inward, having a mounting surface 1h3 substantially at the same height as the upper end of the end wall 1e.
h4 is formed.

At both ends of the long side 1a, an end locking block 1j having substantially the same height as the long side locking block 1h is formed, and the end locking block 1j has a long side. A mounting surface 1j1 having substantially the same height as the unit side locking block 1h
And a projecting portion 1j2 extending above the mounting surface 1j1 and extending along the long side portion 1a and a projecting portion 1j3 extending in a direction perpendicular to the long side portion 1a. An L-shaped protrusion 1j4 is formed. The outer surface 1j5 of the end locking block 1j is also formed substantially flush with the outer surface 1e1 of the end wall 1e. In addition, 1k is a reinforcing block appropriately formed at a corner formed by the end wall 1e and the horizontal wall 1d3 of the double wall 1d.
Of the reinforcing block 1k may be located below the upper end of the end wall 1e, if necessary.

The short side 1b of the bottom 1 is longer than the long side 1a.
The short side portion 1b has a vertical wall 1m extending almost vertically upward along the short side edge of the bottom plate 1c, and the bottom plate 1c adjacent to the vertical wall 1m includes: Vertical wall 1
The same hinge female portion 1f as described above is formed at predetermined intervals along m.
Four hinge female portions 1f are formed at substantially equal intervals. ).

At the corners formed by the short side 1b and the long side 1a and located at both ends of the short side 1b, through holes 1n are formed.
A fitting portion 1n in which a hole 1 is formed is formed, and a fitting protrusion formed on a short side wall 3 described later is configured to be fitted. A short side locking block 1p is formed at a corner formed by the vertical wall 1m and the bottom plate 1c of the short side 1b. And the height of the short side locking block 1p is
It is formed at substantially the same height as the above-described long side locking block 1h and the end locking block 1j, and similarly to the long side locking block 1h, substantially the same height as the upper end of the end wall 1e. Notch 1 facing inward, having a mounting surface 1p1
p2 is formed. Also, the short side locking block 1p
Is an outer surface 1m1 of the vertical wall 1m of the short side 1b.
And at least the short side 1b
Are configured so as not to protrude outward beyond the outer surface 1m1 of the vertical wall 1m.

1r is a pair of horizontal frames 1r formed in the middle of the short side 1b and arranged at predetermined intervals.
1, 1r2 and a back frame 1r3 are formed with a concave portion 1r4 having an open outside, and are hook members that can be inserted into a nail of an automatic machine such as a robot or a finger or the like by an operator. 1s
Is a concave portion formed in the outer wall 1d1 of the double wall portion 1d constituting the long side portion 1a of the bottom portion 1. In this concave portion 1s, the destination, the type, the number, etc. of the articles stored in the folding container are provided. A label, a barcode, a magnetic tape, or the like, in which various information regarding the folding container and the stored articles are described or stored, is attached. It should be noted that 1t is a low-height reinforcing rib formed on the back surface of the bottom plate 1c as necessary, running vertically and horizontally.

Next, FIG. 2, FIG. 5, FIG. 6, and FIG.
The long side wall 2 will be described with reference to FIG.

The long side wall 2 has a horizontally long rectangular plate-like portion 2a.
And a lower horizontal frame 2b extending outward from the lower end of the plate-like portion 2a. The lower horizontal frame 2b has a lower surface corresponding to a hinge female portion 1f formed on the bottom portion 1 on the lower surface thereof. , A hinge male part 2c is formed. The hinge male part 2c is suspended from the lower surface of the lower horizontal frame 2b, and includes a pair of vertical pieces 2c1 perpendicular to the plate-like part 2a and a horizontal pin 2c2 arranged between the pair of vertical pieces 2c1. The lower part of the vertical piece 2c1 is formed as a semicircular portion 2c1 '.

Reference numeral 2d denotes a lower block formed on the lower surface of the lower horizontal frame 2b.
c has a pair of vertical pieces 2d1 similar to the vertical piece 2c1 and a connecting wall 2d2 formed between the pair of vertical pieces 2d1. The lower end of the connecting wall 2d2 is formed in the semi-cylindrical part 2d2 ′. I have. The lower end of the lower block 2d coincides with the lower end of the vertical piece 2c1 of the male hinge part 2c, and the semi-cylindrical part 2d2 of the lower block 2d and the semi-circular part 2c1 'of the lower part of the vertical piece 2c1 are almost Have the same radius.

A plurality of vertical ribs 2e and horizontal ribs 2f are appropriately formed on the outer surface 2a1 of the plate-like portion 2a. The folding container is assembled and the long side wall 2 is
On the other hand, when it is set up vertically, the inner surface 2a2 of the plate-like portion 2a has a double wall portion 1d constituting the long side portion 1a of the bottom portion 1.
The inner wall 1d2 is substantially flush with the inner wall 1d2. When the folding container is assembled, the vertical ribs 2e and the horizontal ribs 2f do not protrude outward beyond the outer wall 1d1 of the double wall 1d constituting the long side 1a of the bottom 1. Have been.

At both ends of the long side wall 2, an engagement frame portion 2g extending in a direction perpendicular to the plate-like portion 2a is formed, and an upper fitting through hole is formed at an upper portion of the engagement frame portion 2g. 2h, a horizontal and horizontally long engaging projection 2k is provided between the two through holes 2j1 and 2j2 formed below the upper fitting through hole 2h.
Are projected from the inner surface 2g1 of the engagement frame 2g. FIG.
As shown in FIG. 0, the cross-sectional shape of the engagement protrusion 2k is
The tip is a tapered bulging portion 2k1 and a bulging portion 2k.
A horizontal portion 2k2 extending from 1 to the outer surface 2a1 of the plate-like portion 2a forms a substantially mushroom shape. Furthermore,
A fitting recess 2m is formed below the engaging protrusion 2k, and the long side wall 2 where the fitting recess 2m is located has a fitting through hole 2m.
m1 is formed. Furthermore, a lower fitting through hole 2n is formed below the fitting recess 2m. Engagement frame 2
g, upper fitting through hole 2h, through hole 2j1, 2j2
The lower fitting through hole 2n is formed substantially parallel to the plate-like portion 2a, and the lower surface 2g2 of the engagement frame portion 2g is located above the lower horizontal frame 2b. The above fitting through hole 2
In FIG. 3, when the long side wall 2 is folded so as to overlap on the folded short side wall 3 in the folding process of the folding container, as shown in FIG. The side locking block 1p is configured to be inserted.

At both lower end portions of the long side wall 2, a lower horizontal frame 2 is provided.
vertical frame 2 of horizontal frame 2p and male hinge portion 2c one step higher than b
A notch 2r formed by c1 is formed, and a long side wall 2 is attached to the bottom 1 at the notch 2r, and when the long side wall 2 stands upright with respect to the bottom 1,
The end locking block 1j formed on the bottom 1 is
It is configured to be able to enter without interference. An abutment wall 2p1 formed on the extension of the plate-like portion 2a is provided vertically on the lower surface of the horizontal frame 2p, and the lower end of the abutment wall 2p1 is substantially the same as the lower surface of the lower horizontal frame 2b. It is configured to be. When the long side wall 2 is set upright with respect to the bottom 1, the lower end 2 p 1 ′ of the abutment wall 2 p 1 approaches or rests on the mounting surface 1 j 1 of the end locking block 1 j of the bottom 1. At the same time, the abutment wall 2p1 is configured to contact the inner surface of the protruding portion 1j2 of the end locking block 1j.

When the long side wall 2 in the folded state is rotated in the vertical direction, the abutment wall 2p1 comes into contact with the inner surface of the protruding portion 1j2 of the end locking block 1j formed on the bottom 1 so that the long side wall 2p1 is long. The side wall 2 is prevented from further turning beyond the vertical state, and therefore, the hinge female portion 1f and the hinge male portion 2
It is possible to prevent the hinge portion made of c from being damaged. Also, when the long side wall 2 is set upright with respect to the bottom 1, the lower end 2 p 1 ′ of the abutment wall 2 p 1 approaches or comes into contact with the mounting surface 1 j 1 of the end locking block 1 j of the bottom 1. Even if a load is applied to the long side wall 2 from above, the load is applied to the abutment wall 2p1 and the end locking block 1j.
Since the load is not applied to the hinge portion, it is possible to prevent the hinge portion from being damaged.

Reference numeral 2s denotes a concave portion formed so as to bulge the lower horizontal frame 2b upward, and has a downwardly open concave portion. The long side wall 2 is attached to the bottom 1 and the long side wall 2 is attached to the bottom 1. When the is set up vertically, the long side locking block 1h formed on the bottom 1 is configured to be able to enter. In this embodiment, the concave portion 2s is formed by a pair of vertical pieces 2d1 of the lower block 2d and the top portion 2s1, and an upper portion of the concave portion 2s is formed on the extension of the plate-like portion 2a. A joint wall 2s2 is formed,
The lower end of the abutment wall 2s2 is configured to be substantially the same as the lower surface of the lower horizontal frame 2b. And this abutment wall 2
s2, when the long side wall 2 stands upright with respect to the bottom 1, the lower end thereof is placed on the mounting surface 1 of the long side locking block 1h.
h3 approaches or abuts, and the abutment wall 2s2
The protruding portion 1h2 of the long side locking block 1h is configured to abut.

When the long side wall 2 in the folded state is rotated in the vertical direction, the abutting wall 2s2 comes into contact with the protruding portion 1h2 of the long side locking block 1h formed on the bottom portion 1 so that the long side wall 2s2 is long. The side wall 2 is prevented from further turning beyond the vertical state, and therefore, the hinge female portion 1f and the hinge male portion 2
It is possible to prevent the hinge portion made of c from being damaged. In addition, when the long side wall 2 is set upright with respect to the bottom 1, the lower end of the abutment wall 2 s 2 approaches or comes into contact with the mounting surface 1 h 3 of the long side locking block 1 h of the bottom 1. Therefore, even if a load is applied to the long side wall 2 from above, the load is applied to the abutment wall 2s2 and the long side locking block 1h.
Since the load is not applied to the hinge portion, it is possible to prevent the hinge portion from being damaged.

Between the end wall 1e of the bottom portion 1 and the hook portion 1f2 of the hinge female portion 1f formed on the bottom portion 1, the horizontal pin 2 of the hinge male portion 2c formed on the long side wall 2 is provided.
A gap with a smaller interval is formed than the diameter of c2.

Next, referring to FIG. 1 and FIGS.
The short side wall 3 will be described.

The short side wall 3 is also similar to the long side wall 2 described above.
It has a horizontally long rectangular plate-like portion 3a and a lower horizontal frame 3b extending outward from the lower end of the plate-like portion 3a.
On the lower surface of the lower horizontal frame 3b, a male hinge portion 3c is formed corresponding to the female hinge portion 1f formed on the bottom portion 1. The hinge male part 3c is, like the hinge male part 2c formed on the long side wall 2 described above, hung on the lower surface of the lower horizontal frame 3b and a pair of vertical pieces 3c1 perpendicular to the plate-shaped part 3a.
And a horizontal pin 3c2 disposed between the pair of vertical pieces 3c1
The lower portion of the vertical piece 3c1 is formed as a semicircular portion 3c1 '.

Further, a lower block 3d similar to the lower block 2d formed on the long side wall 2 is formed. In this embodiment, the lower block 3d is composed of one vertical piece 3c1 of the hinge male part 3c, a vertical piece 3d1 similar to the vertical piece 3c1, and a connecting wall 3d2 formed between the vertical pieces 3c1, 3d1. A connecting wall 3 formed between a pair of vertical pieces 3c1 of the male hinge part 3c or formed
d2. The lower end of the connecting wall 3d2 is formed as a semi-cylindrical portion 3d2 '. Note that the lower end of the lower block 3d coincides with the lower end of the vertical piece 3c1 of the male hinge part 3c, and the lower end of the connecting wall 3d2 is a semi-cylindrical part 3d.
2 ′ and the lower semicircular portion 3c1 ′ of the vertical piece 3c1
They have approximately the same radius.

An upper horizontal frame 3e is formed at the upper end of the plate-like portion 3a, and a lower horizontal frame 3b and an upper horizontal frame 3e are formed.
An opposing vertical frame 3f connecting both ends of e is formed. When the folding container is assembled, the short side wall 3
Is set up perpendicular to the bottom 1, the plate-shaped portion 3 a
The inner surface 3a1 is substantially flush with the inner surface of the plate-like piece 1f1 of the hinge female portion 1f formed on the bottom portion 1. When the folding container is assembled, the lower horizontal frame 3b, the upper horizontal frame 3e, the vertical frame 3f, and the like are configured not to protrude outward beyond the short side 1b of the bottom 1.

On the short side wall 3, there is formed a vertically elongated concave portion 3g formed by bending the lower horizontal frame 3b upward and having an open lower portion. The concave portion 3g has a folding container. Is assembled, and when the short side wall 3 is set up perpendicular to the bottom 1, the short side locking block 1 p formed on the bottom 1 can enter without interfering with the short side wall 3. Is configured.

Outside the vertical frame 3f of the short side wall 3, an engagement frame 3h is formed, and is formed as an extension of the plate 3a, and is located above the plate 3h1 of the engagement frame 3h. Are formed at both ends of the long side wall 2 toward the outside.
g, a substantially prismatic upper fitting protrusion 3j that can be fitted into the upper fitting through hole 2h formed in
Under the upper fitting projection 3j, a pair of locking pieces 3k, which are formed so that the locking projections 3k1 face each other, extend substantially in the horizontal direction. A swelling portion 2k1 of an engaging projection 2k formed on the long side wall 2 is inserted between the pair of locking pieces 3k.
Through holes 2j formed above and below the engagement projections 2k.
1 and 2j2, and the engaging projection 3k1 of the engaging piece 3k formed on the engaging frame 3h of the short side wall 3 is engaged with the engaging projection 2k formed on the engaging frame 2g of the long side wall 2. Is configured to be locked to the back surface 2k1 'of the bulging portion 2k1.

Further, a vertical frame 3f is provided below the locking piece 3k.
An intermediate fitting convex portion 3m extending outwardly perpendicular to the inner wall is formed, and the intermediate fitting convex portion 3m is formed in a fitting concave portion 2m formed in the engaging frame portion 2g of the long side wall 2. It is configured to be fitted. Further, a flat lower engagement projection 3n is formed below the intermediate fitting projection 3m, and the lower engagement projection 3n is formed on the lower side of the engagement frame 2g of the long side wall 2. It is configured to be fitted in the fitting through hole 2n. Below the lower engagement projection 3n, a box-shaped lower fitting projection 3p is formed, and the lower fitting projection 3p is engaged with the engagement frame on the long side wall 2 side when the folding container is assembled. A gap D formed between the lower surface 2g2 of the portion 2g and the upper surface of the fitting portion 1n formed at both ends of the short side portion 1b of the bottom portion 1.
It is formed to be inserted into. Further, the engagement frame 3
A lower end engaging projection 3r is formed at the lower end of h, and the lower end engaging projection 3r is fitted into the through-hole 1n1 of the fitting portion 1n formed at both ends of the short side 1b of the bottom 1. It is configured to: Reference numeral 3s denotes a handle opening formed above the short side wall 3 and into which an operator's finger can be inserted.

The horizontal pin 3 of the male hinge portion 3c formed on the short side wall 3 is provided between the vertical wall 1m of the bottom portion 1 and the hook portion 1f2 of the female hinge portion 1f formed on the bottom portion 1.
A gap with a smaller interval is formed than the diameter of c2.

Next, the assembling of the bottom portion 1, the long side wall 2, and the short side wall 3 having the above-described configuration will be described.

The long side wall 2 is lowered, and the horizontal pin 2c2 of the male hinge part 2c formed on the long side wall 2 is connected to the end wall 1e of the bottom part 1 and the hook part of the hinge female part 1f formed on the bottom part 1. 1f2, when it is forcibly inserted, the plate-like piece 1f1 of the hinge female portion 1f of the bottom portion 1 tilts inward, and therefore, the end wall 1e of the bottom portion 1 and the hinge female portion 1f.
Between the hook portion 1f2 and the hinge male portion 2 of the long side wall 2.
c, there is a gap through which the horizontal pin 2c2 passes.
c2 is pushed down to below the hook portion 1f2 of the hinge female portion 1f of the bottom portion 1. Then, the hinge female part 1 of the bottom part 1
The plate-like piece 1f1 returns to its original position by the elastic force of the plate-like piece 1f1 itself, and the horizontal pin 2c2 of the hinge male part 2c of the long side wall 2 is connected to the hook part of the hinge female part 1f of the bottom part 1. The bottom portion 1 and the long side wall 2 are hingedly connected to the recessed portion 1f2 'of 1f2 by the hinge female portion 1f formed on the bottom portion 1 and the hinge male portion 2c formed on the long side wall 2. become. Similarly, the bottom portion 1 and the short side wall 3 are similarly connected by the hinge connection of the hinge female portion 1f formed on the short side portion 1b side of the bottom portion 1 and the hinge male portion 3c formed on the short side wall 3. It is configured to be.

To assemble as shown in FIG. 1 from the folded state shown in FIG.
Then, the long side wall 2 in a state of being superimposed on the short side wall 3 is set up vertically, and then the short side wall 3 is set up upright to assemble the folding container into a box shape. By engaging the engaging frame 2g formed on the long side wall 2 with the engaging frame 3h formed on the short side wall 3, the short side wall 3 of the assembled folding container can be easily formed.
It is configured not to fall inward.

As described above, when the short side wall 3 is rotated in the vertical direction with respect to the vertically long side wall 2, first, the lower end formed on the engagement frame portion 3h of the short side wall 3 is formed. The engagement protrusions 3r are fitted into the through holes 1n1 of the fitting portions 1n formed at both ends of the short side portion 1b of the bottom portion 1. Next, the lower fitting projections 3p of the engagement frame 3h of the short side wall 3 are fitted on the lower surface 2g2 of the engagement frame 2g on the long side wall 2 side and on both ends of the short side 1b of the bottom 1. It is inserted into the gap D formed between the upper surface of the joining portion 1n and the lower engaging protrusion 3n of the engaging frame portion 3h of the short side wall 3 is fitted to the lower fitting of the engaging frame portion 2g of the long side wall 2. The intermediate fitting projection 3m of the engagement frame 3h of the short side wall 3 is fitted into the fitting recess 2m of the engagement frame 2g of the long side wall 2. Furthermore, the engagement frame portion 3h of the short side wall 3
The locking projection 3k1 of the pair of locking pieces 3k is configured to be locked to the back surface 2k1 'of the bulging portion 2k1 of the engaging projection 2k formed on the engaging frame 2g of the long side wall 2. I have. And finally, the upper fitting projection 3 of the engagement frame portion 3h of the short side wall 3
j is fitted into the upper fitting through hole 2h of the engagement frame 2g of the long side wall 2 and the engagement frame 2g formed on the long side wall 2 and the engagement frame 3h formed on the short side wall 3 Are surely engaged with each other.

As described above, when the short side wall 3 is rotated in the vertical direction with respect to the long side wall 2 which is set up vertically,
First, the lower end engaging projections 3r formed on the engaging frame 3h of the short side wall 3 are fitted into the through holes 1n1 of the fitting portions 1n formed on both ends of the short side 1b of the bottom 1. You. Next, a flat lower engaging projection 3n of the engaging frame 3h on the short side wall 3 side.
Is fitted in the lower fitting through hole 2n of the engagement frame portion 2g of the long side wall 2 so that the short side wall 3 is shorter than the long side wall 2 (The direction in which the side wall 3 moves in the vertical direction).
The position of the engagement frame 3h of the short side wall 3 with respect to the plate-like portion 2a can be prevented from moving.
h and the engagement frame portion 2g of the long side wall 2 smoothly.
And it can be performed reliably.

Further, a substantially prismatic upper fitting projection 3 having a tapered tip is provided on the engagement frame 3h of the short side wall 3.
j is formed, and the upper fitting projection 3j is formed by the upper fitting projection 3j at the final stage of the engagement work between the engaging frame 3h of the short side wall 3 and the engaging frame 2g of the long side wall 2. Since the outer peripheral surface is configured to be fitted so as to approach the inner peripheral surface of the upper fitting through hole 2h formed in the engagement frame portion 2g on the long side wall 2 side, The vertical movement of the short side wall 3,
Since the movement of the short side wall 3 in the contact / separation direction with respect to the long side wall 2 is restricted, it is possible to prevent the long side wall 2 and the short side wall 3 from rattling in the assembled folding container. When the folded containers in the assembled state are stacked, it is possible to prevent the stacked folded containers from wobbling, and to stack the folded containers in a stable state.

As described above, the engagement frame 3h of the short side wall 3
Are formed so as to fit into the through holes 1n1 of the fitting portions 1n formed at both ends of the short side portion 1b of the bottom portion 1 so that the bottom portion 1 and the short side wall 3 Is improved, and the movement of the short side wall 3 with respect to the bottom 1 is restricted.
Is moved so that the hinge female portion 1f formed on the bottom portion 1 and the male hinge portion 3c formed on the short side wall 3 constitute a hinge connection connecting the bottom portion 1 and the short side wall 3. Can be prevented. Further, the lower end engaging projection 3r of the engaging frame 3h of the short side wall 3 and the through-hole 1n1 of the fitting portion 1n formed at both ends of the short side 1b of the bottom 1 function as a kind of positioning. Therefore, the connection between the bottom portion 1 and the short side wall 3 can be performed smoothly and reliably.

Further, the lower end engaging projections 3r formed on the engaging frame 3h of the short side wall 3 are fitted into the through holes 1n1 of the fitting portions 1n formed at both ends of the short side 1b of the bottom 1. So that
The coupling strength between the bottom portion 1 and the short side wall 3 is improved, and the lower engaging projections 3n formed on the engaging frame portion 3h of the short side wall 3 are provided.
In the lower fitting through hole 2n formed in the engaging frame portion 2g of the long side wall 2, and the long side wall of the intermediate fitting convex portion 3m formed in the engaging frame portion 3h of the short side wall 3. 2 is fitted into the fitting recess 2m formed in the engaging frame 2g, and the locking projections 3k1 of the pair of locking pieces 3k formed in the engaging frame 3h of the short side wall 3 are connected to the long side wall 2. Swelling portion 2 of engagement protrusion 2k formed on engagement frame portion 2g
and the upper fitting projection 3j formed on the engaging frame 3h of the short side wall 3 into the upper fitting through hole 2h formed on the engaging frame 2g of the long side wall 2. Since the long side wall 2 and the short side wall 3 are firmly connected by a plurality of fitting means and locking means called fitting, the connection between the long side wall 2 and the short side wall 3 is hard to be released, and as a result, the assembly is completed. The strength of the folded container in the state is improved, and even when a large number of folded containers in the assembled state are stacked, the long side wall 2 and the short side wall 3 do not move, and the state is stable. Can be stacked, that is, stacked.

Further, when the folding container is assembled, the lower fitting projection 3p formed on the engagement frame 3h of the short side wall 3 is used to lower the lower surface 2g2 of the engagement frame 2g of the long side wall 2.
And fitting portions 1 formed at both ends of the short side portion 1b of the bottom portion 1
n is formed in a sandwiched manner in a gap D formed between the folded container and the upper surface of the folded container. Since the load is borne by the lower fitting projection 3p of the short side wall 3 placed on the upper surface of the fitting portion 1n formed at both ends of the short side 1b, the bottom 1 and the short side wall 3 are separated. Since no load is applied to the connected hinge connection, it is possible to prevent the hinge female portion 1f formed on the bottom portion 1 and the male hinge portion 3c formed on the short side wall 3 from being damaged.

Furthermore, the engagement frame 3h of the short side wall 3 has
A pair of locking pieces 3k, which are formed so that the locking projections 3k1 face each other at the tips, extend substantially in the horizontal direction, and the pair of locking pieces 3k form an engagement frame on the long side wall 2 side. Since the rear surface 2k1 'of the bulging portion 2k1 of the engaging protrusion 2k formed on the portion 2g is configured to be locked, even if the long side wall 2 or the short side wall 3 is rattled in the vertical direction, any one of the two may be loose. Since the locking piece 3k is locked to the engagement projection 2k, the locking state of the locking piece 3k and the engagement projection 2k does not come off, and the long side wall 2 or the short side wall 3 is not removed. ,
Even if it moves in the horizontal direction, since the locking piece 3k is formed in a horizontally elongated shape extending in the horizontal direction, it does not come off from the engagement protrusion 2k, and therefore, the engagement frame portion of the long side wall 2 The engagement between 2 g and the engagement frame portion 3 h of the short side wall 3 becomes strong. Furthermore, the intermediate fitting projection 3m formed on the engagement frame 3h of the short side wall 3 is configured to be fitted into the engagement recess 2m formed on the engagement frame 2g of the long side wall 2. Because
Since the play between the long side wall 2 and the short side wall 3 and the relative movement between the long side wall 2 and the short side wall 3 are regulated, the locking between the locking piece 3k and the engagement protrusion 2k is more reliably performed. Departure from the state can be prevented.

In the state where the folding container is assembled as described above, the long side locking block 1h formed on the bottom 1 is attached to the lower horizontal frame 2 of the long side wall 2.
b, formed into the recess 2s which is open at the bottom, and the short side locking block 1p formed at the bottom 1
However, it is configured such that it can enter a vertically long concave portion 3g formed in the short side wall 3. In this manner, in a state where the folding container is assembled, the long side locking block 1h and the short side locking block 1p formed on the bottom 1 do not abut on the long side wall 2 and the short side wall 3. It is configured. In a state where the folding container is assembled, the end locking block 1j formed on the bottom 1 is attached to the lower horizontal frame 2 at both lower ends of the long side wall 2.
vertical frame 2 of horizontal frame 2p and male hinge portion 2c one step higher than b
It is configured such that it can enter into the notch 2r formed by c1 without interfering with the long side wall 2.

As described above, the outer surface 1h1 of the long side locking block 1h, the outer surface 1p3 of the short side locking block 1p and the outer surface 1p of the end locking block 1j formed on the bottom portion 1 are formed.
j5 is the long side 1a and the short side 1b of the bottom 1
And the long side wall 2 and the short side wall 3 are configured not to protrude outward beyond the long side portion 1a and the short side portion 1b of the bottom portion 1. Moreover, since the outer surfaces of the bottom portion 1, the long side wall 2 and the short side wall 3 are configured to be substantially flush, the assembled two folding containers are brought into contact with the long side wall 2 and the short side wall 3. Even if they are juxtaposed, there is substantially no gap between adjacent folding containers, and therefore, the storage efficiency of the assembled folding containers is improved. Also, unlike the conventional foldable container, the fitting bank portion is not formed, so that the inner volume is larger than the outer size of the assembled foldable container, and therefore, the storage efficiency of the assembled foldable container is improved. I do.

When the assembled folding container shown in FIG. 1 is to be folded, as shown in FIG. 3, first, the short side wall 3 is rotated in the direction of the bottom 1. Thus, the engagement between the engagement frame portion 2g of the long side wall 2 and the engagement frame portion 3h of the short side wall 3 is released, and the short side wall 3 is overlaid on the bottom portion 1. Next, the long side wall 2 is folded down and overlapped on the folded short side wall 3. At this time, the short side locking block 1 p formed on the bottom 1 is formed on the engagement frame 2 g of the long side wall 2. Into the fitting recess 2m, and then into the fitting through hole 2m1 formed in the long side wall 2, so that the short side locking block 1p formed in the bottom portion 1 is formed. There is no obstacle to folding of the long side wall 2.

Further, since the short side locking block 1p is configured to be inserted into the fitting through hole 2m1 formed in the long side wall 2, the short side locking block 1p is directed outward or inward. Even if a force is applied from the inside, the fitting through hole 2m1 serves to prevent the short side locking block 1p from shifting, so that the short side locking block 1p does not shift or be damaged. Thus, the folded containers can be stacked in a stable manner. In this way, the folding container will be folded. In addition, at the tip of the fitting recess 2m, a flared inclined surface 2m
By forming 2, the short side locking block 1p can be configured so as not to hit the engaging frame 2g located above and below the fitting recess 2m when the short side locking block 1p is inserted into the fitting through hole 2m1. preferable. The inclined surface 2m2 also functions as a guide surface when the short side locking block 1p is inserted into the fitting through hole 2m1.

When the folded containers in the folded state shown in FIG. 3 are stacked, the notch 1h4 of the long side locking block 1h formed on the bottom 1 of the lower folding container, and the short Side locking block 1
The notch 1p2 of the p and the protrusion 1j4 of the end locking block 1j have the bottom 1 of the folding container located thereon.
The bottom fitting portion 1 'formed by the inner wall 1d2 and the like is fitted, and the bottom fitting portion 1' is connected to the long side locking block 1h.
Mounting surface 1h3, mounting surface 1p of short side locking block 1p
1 and the end locking block 1j, so that it is mounted on the mounting surface 1j1. Therefore, the upper folding container is positioned at the lower side of the folding container and the longer side locking block 1h. The short side locking block 1p and the end locking block 1j prevent the movement in the horizontal direction,
It is configured such that a large number of folded containers can be stacked in a stable state.

In the embodiment described above, the long side locking block 1h and the short side locking block 1p formed on the bottom 1 are formed.
The arrangement and number of the end locking blocks 1j are not limited to the above-described embodiment. When the long side locking block 1h and the short side locking block 1p are formed on the bottom portion 1, when the folded containers in a folded state are stacked one on top of the other, the folding container located on the upper side is folded. The bottom fitting portion 1 'of the bottom 1 of the container is formed with a notch 1h4 of the long side locking block 1h and a notch 1p2 of the short side locking block 1p formed on the bottom 1 of the folding container located below. And the horizontal movement thereof is prevented, so that the end locking block 1j can be omitted. Furthermore, the end locking block 1j has a substantially L-shaped planar shape including a projection 1j2 extending along the long side 1a and a projection 1j3 extending at right angles to the long side 1a. Since the U-shaped protrusion 1j4 is formed, the folded state of the folded state is achieved only by the end locking block 1j without forming the long side locking block 1h and the short side locking block 1p. Stabilize containers
It can also be stacked.

[0052]

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

The joint strength between the bottom and the side wall is improved, and the movement of the side wall with respect to the bottom is restricted.
Therefore, it is possible to prevent the hinge portion connecting the bottom portion and the side wall from being damaged by the large movement of the side wall with respect to the bottom portion. In addition, since the engagement protrusion on the side wall and the fitting hole on the bottom function as a kind of positioning, the bottom and the side wall can be connected smoothly and reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view of an assembled state of a folding container according to the present invention.

FIG. 2 is a perspective view of the folding container according to the present invention in the middle of assembly.

FIG. 3 is a perspective view of the folding container according to the present invention in a folded state.

FIG. 4 is a perspective view of the bottom of the folding container of the present invention.

FIG. 5 is an exploded partial perspective view of the bottom and the long side wall for explaining the hinge connection between the bottom and the long side wall of the folding container according to the present invention.

FIG. 6 is an exploded partial perspective view near the bottom and the end of the long side wall of the folding container according to the present invention.

FIG. 7 is a rear perspective view of the folded container of the present invention in a folded state.

FIG. 8 is a perspective view of a long side wall of the folding container according to the present invention.

FIG. 9 is a partial perspective view of a long side wall of the folding container according to the present invention.

FIG. 10 is a vertical cross-sectional view of the long side wall and the short side wall of the folding container according to the present invention before the engagement frame portion of the long side wall and the engagement frame portion of the short side wall are engaged with each other.

FIG. 11 is a perspective view of a short side wall of the folding container according to the present invention.

FIG. 12 is a partial perspective view of a short side wall of the folding container according to the present invention.

FIG. 13 is a vertical cross-sectional view of the long side wall and the short side wall of the folding container according to the present invention in a state where the long side wall engaging frame portion and the short side wall engaging frame portion are engaged with each other.

[Explanation of symbols]

 1 Bottom 1f Hinge female 1h Long side locking block 1j End locking block 1p ··············································································································································· ..Recesses

Claims (1)

[Claims] In a folding container capable of folding a side wall disposed so as to surround a bottom portion so as to overlap the bottom portion, when the side wall is set upright with respect to the bottom portion,
A folding container, wherein an engagement projection formed on the side wall is fitted into a fitting hole formed on a bottom portion.