JP2003160130A - Folding container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding container, the height of which becomes small when the container is folded, so that the housing efficiency of the folded container is improved and a less housing space for the container becomes necessary, and in which a lower short side wall is surely locked to a long side wall to prevent the lower short side wall from falling toward the bottom, thus improving the workability of assembling the folding container. <P>SOLUTION: A short side wall 27 comprises an upper short side wall 2a and the lower short side wall 27b, both short side walls coupled together via hinge members H3, h3. A projected fitting strip 37 formed on the lower short side wall constituting part of the short side wall is inserted into the hole 63a of a fitting strip 63 formed on the long side wall, and the hooked part 37a of the projected fitting strip 37 is locked to the fitting strip 63 in order to engage the long side wall 51 with the short side wall 27. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 23 to 25, a long side wall 2 connected to an opposing long side 1a of a rectangular bottom portion 1 by a suitable hinge, and the bottom portion 1 similarly.
There is known a folding container comprising short side walls 3 connected to each other on their opposite short sides 1b by a suitable hinge. In the folded state, as shown in FIG. The short side wall 3 is folded so as to overlap, and the long side wall 2 is further folded thereon. Then, the long side wall 2 in the folded state is erected vertically to the bottom portion 1 as shown in FIG. 24, and then the short side wall 3 in the folded state is placed vertically to the bottom portion 1. As shown in FIG. 23, by standing up, it is configured to be assembled into a box-shaped container. And
By engaging the engaging recess 3a formed at the vertical end of the long side wall 2 with the engaging piece 3a formed at the vertical end of the short side wall 3, the folding container in the box-shaped assembled state The short side wall 3 is configured so as not to easily fall in the direction of the bottom 1.

[0003]

In the conventional folding container described above, as shown in FIG. 25, the height of the folded state is high, so that the folding container in the folded state has a poor storage efficiency. There was a problem that the storage space became large.

As shown in FIG. 23, when the engagement between the engagement recess 2a of the long side wall 2 and the engagement piece 3a of the short side wall 3 in the state of being assembled in a box shape is weak, the engagement is easy. There is a problem that the short side wall 3 of the folding container in the box-shaped assembled state falls down toward the bottom portion 1 due to the disengagement. Further, when the engagement state between the engagement concave portion 2a of the long side wall 2 and the engagement piece 3a of the short side wall 3 is strong, the short side wall 3 is tilted toward the bottom portion 1 as shown in FIG. There is a problem in that, when they are overlapped with each other, the engaging piece 3a of the short side wall 3 is not easily disengaged from the engaging concave portion 2a of the long side wall 2, and the workability of the folding operation of the folding container is deteriorated.
When the short side wall 3 stacked on the bottom part 1 is stood up and assembled in a box shape as shown in FIG. 23, the engagement recess 2a of the long side wall 2 and the engagement piece 3a of the short side wall 3 are There was a problem in that the workability of assembly of the folding container into the box shape deteriorates because the engagement is difficult.

An object of the present invention is to solve the problems of the conventional folding container described above and to provide a folding container in which the engagement state of the long side wall and the short side wall is reliable.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention sets a long side wall in a folded state to stand vertically with respect to a bottom, and then a short side wall in a folded state is set on a bottom. In a folding container that is assembled vertically into a box-shaped container, the short side wall is composed of an upper short side wall portion and a lower short side wall portion connected through a hinge member. Engaging the long side wall and the short side wall by inserting the fitting projection piece formed in the lower short side wall portion forming the short side wall into the through hole of the fitting piece formed in the long side wall, and This is done by engaging the hook portion of the fitting projection piece with the fitting piece. Secondly, a fitting hole is formed in the outer wall surface of the lower short side wall portion. To form a box-shaped bulge, and to pierce the bulge. The engaging projections formed on the upper short side wall are fitted into the fitting holes. Thirdly, the insertion projecting pieces are formed near the vertical edges on both sides of the upper short side wall. Then, the insertion projection piece is formed on the inner frame of the fitting piece projecting on the long side wall, and the fitting projection formed on the lower short side wall portion inserted into the through hole formed in the fitting piece. It is designed to be inserted into a gap formed between the locking projection piece and the fourth, and fourthly, below and on both sides of the locking projection piece around the locking projection piece formed on the upper short side wall portion. A substantially U-shaped projecting portion is provided along the lower short side wall part when the upper short side wall part is overlapped with the lower short side wall part. It is configured so as to be positioned close to the upper part and both sides of the box-shaped bulging portion formed on the outer wall surface of the box and having the fitting hole formed therein.

[0007]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

First, the bottom portion 10 integrally formed of synthetic resin will be described with reference to FIGS.

The bottom portion 10 is formed in a substantially rectangular shape in a plan view, and on the opposite long side sides of the bottom portion 10, a long side bank portion having a substantially inverted U-shaped cross section perpendicular to the longitudinal direction. 11
Are formed. On the outer upper surface of the long side bank portion 11,
An outer wall 12 that extends upward and is flush with the outer surface 11a of the long-side bank portion 11 (hereinafter referred to as the long-side outer wall) is formed, and an inner upper surface of the long-side bank portion 11 is formed. The plate-shaped part h1 that constitutes the long-side hinge female part H1 extends upward, and a hook h2 whose tip is curved toward the long-side outer wall 12 is formed at the upper part of the plate-shaped part h1. There is. The long side bank portion 11 is formed with a proper number of long side hinge female portions H1 at predetermined intervals. In this example,
An example in which six long-side hinge female portions H1 are formed is shown. The long-side hinge female portion H1 is formed at substantially the same height as the long-side outer wall 12.

An outer wall 13 (hereinafter referred to as a short side outer wall) 13 having a height lower than that of the outer wall 12 formed on the long side bank 11 is formed on the opposite short sides of the bottom portion 10. There is. Further, along the short side outer wall 13 and close to the short side outer wall 13, the bottom portion 10 includes a plate-shaped portion h1 and a hook h2 curved toward the short side outer wall 13. Short side hinge female part H2 similar to the long side hinge female part H1
Are formed. In the present embodiment, an example in which four short-side hinge female parts H2 are arranged is shown.
The short-side hinge female portion H2 is formed to have substantially the same height as the short-side outer wall 13.

At the four corners of the bottom portion 10, the long side outer wall 1 is provided.
A corner block 14 having a substantially L-shaped planar shape is formed so as to extend upward beyond 2 and the short side outer wall 13. Inside the corner block 14, a cutout concave portion 14b is formed in which a mounting surface 14a having substantially the same height as the long-side hinge female portion H1 and the long-side outer wall 12 is formed.

Numeral 15 is a plate-shaped rib formed at an appropriate number at a corner formed by the upper surface of the long-side bank 11 and the inner wall surface of the long-side outer wall 12 at a predetermined interval. It has a function of reinforcing the side outer wall 12. Reference numeral 16 is a plate-like rib similar to the above-mentioned plate-like rib 15 formed at an appropriate number at a corner formed by the upper surface of the bottom portion 10 and the inner wall surface of the short side outer wall 13. It has a function of reinforcing the short side outer wall 13.

Reference numeral 17 denotes a long side bank portion 11, which is formed by extending the central portion of the long side bank portion 11 by a predetermined width to the upper end of the long side outer wall 12 in the longitudinal direction. On the other hand, the vertical cross-section is a substantially U-shaped long-side convex portion, and the long-side convex portion 17 is substantially flush with the long-side outer wall 12 and the upper end of the long-side outer wall 12. Top 17a and long side bank 1
No. 1 inner wall 11b and an inner wall 17b flush with each other, and a side wall 17c facing each other similar to the plate-like rib 15 have an opening downward, and the inside of the long side convex portion 17 is formed into a cavity. Has been done. Reference numeral 18 denotes a cross-sectional shape which is formed by bulging the central portion of the bottom portion 10 near the short side outer wall 13 by a predetermined width to the upper end of the short side outer wall 13 and which has a substantially reverse cross-sectional shape perpendicular to the longitudinal direction. It is a U-shaped convex portion on the short side,
The short-side convex portion 18 has a top portion 18a that is substantially flush with the upper end of the short-side outer wall 13, and an inner wall 18b formed along the plate-shaped portion h1 that constitutes the short-side hinge female portion H2. , Plate-shaped rib 1
6 and a side wall 18c facing each other, and has an opening downward, and the inside of the short side convex portion 18 is formed as a cavity. The long side convex portion 17
The short side convex portions 18 increase the strength and rigidity of the long side and the short side of the bottom portion 10, respectively, and thus the bottom portion 10 respectively.
It has the function of increasing the strength and rigidity of the.

The bottom portion 10 extends downward beyond the lower end portion 11a1 of the outer wall 11a and the lower end portion 13a of the short side outer wall 13 forming the bank portion 11 on the long side, and has a rectangular rear surface and has a predetermined height. A fitting portion 19 having a thickness is formed,
The fitting portion 19 includes a long side wall 19a formed by extending the inner wall 11b of the long bank 11 downward, and a short side wall 19b located inside the short outer wall 13.
It is formed by a cross rib 19c formed in a region surrounded by the long side wall 19a and the short side wall 19b.

Reference numeral 20 denotes an inverted trapezoidal projecting wall formed by extending a substantially central portion of the outer wall 11a constituting the long side bank portion 11 to a fitting portion 19 at a lower end 20a thereof. A gap 20b is formed between the projecting wall 20 and the outer wall 11a of the long side bank 11 and between the inner wall 11b of the long side bank 11 and the long side wall 19a of the fitting part 19 and the gap 20b.
A pair of partition walls 21 that bridge the gap 20b are formed therein. Then, the protruding wall 20 and the long side bank portion 11
The outer side wall 11a, the inner side wall 11b of the long side bank portion 11, the long side side wall 19a of the fitting portion 19, the pair of partition walls 21 and the like form a long side fitting recessed portion 22 that is open downward. .

Reference numeral 23 is an inverted trapezoidal protruding wall formed by extending the lower end 23a of the substantially central portion of the short side outer wall 13 to the fitting portion 19. A gap 23a is formed between the protruding wall 23 and the short side wall 19b of the fitting portion 19, and a pair of partition walls 24 bridging the gap 23a is formed in the gap 23a. Then, the protruding wall 23, the short side wall 19b of the fitting portion 19, the pair of partition walls 24, and the like form a short side fitting recess 25 having an opening at the bottom. In addition, 26 is a substantially inverted U-shaped long side bank portion 1
It is a reinforcing partition rib formed in 1.

Next, referring to FIGS. 5 and 6, the short side wall 27
Will be described.

The short side wall 27 is composed of an upper short side wall portion 27a and a lower short side wall portion 27b which are vertically divided, and the upper short side wall portion 27a and the lower short side wall portion 27b are
Each is integrally molded of synthetic resin. The concave portion 2 is formed near both ends of the lower end of the upper short side wall portion 27a and in the central portion.
8 is formed, and in the recess 28, a horizontal pin h3 bridging the opposite side surfaces 28a forming the recess 28 is attached. 29 is a tongue formed by forming a pair of parallel slits 30 that extend downward from the upper end of the upper short side wall portion 27a by a predetermined depth in regions near both ends of the upper short side wall portion 27a. The tongue piece 29 is provided with a locking projection piece 31, and the locking projection piece 31 is
It is composed of a horizontal portion 31a and a slightly bulged portion 31b formed therein. Reference numeral 32 is a concave portion formed corresponding to the handheld opening 33 formed in the lower short side wall portion 27b, and 34 is an upper short side wall portion 27.
The above-mentioned locking protrusion 3 formed in the central region of the upper end of a
1 is a flange extending in the same direction as that of the flange 34.
Is the U-shaped portion 34a located at the center and the upper short side wall portion 27.
and a horizontal portion 34b formed at the upper end of a. Note that it is not always necessary to form the pair of parallel slits 30 to form the tongue piece 29.

A hinge female block H3 protruding upward is formed near both ends of the upper end of the lower short side wall portion 27b and in the central portion, and the hinge female block H3 is formed with a recess of the above-mentioned upper short side wall portion 27a. A slit 35 is formed along the width direction of the lower short side wall portion 27b into which the horizontal pin h3 attached in 28 can be inserted. Height of the entrance portion 35a of the slit 35 (in FIG. 5 and FIG. 6, the entrance portion 3a
The height of the vertical direction of 5a) is more than the diameter of the horizontal pin h3.
The horizontal pin h3, which is formed slightly smaller and is inserted into the slit 35, is configured so as not to easily come out of the slit 35. Reference numeral 36 denotes a pair of horizontally long fitting holes formed below the hinge female blocks H3 located at both ends, and is configured so that the locking projections 31 formed on the above-mentioned upper short side wall portion 27a fit therein. Has been done.

Numeral 37 is a vertically long fitting projection piece which is provided near the vertical edges on both sides of the lower short side wall portion 27b at a predetermined interval in the vertical direction. 38 is the lower short side wall portion 2
7b is a notch formed at the lower corners on both sides,
As will be described later, when the folding container is assembled into a box shape, the portion 14 located on the short side outer wall 13 side of the corner block 14 formed at the four corners of the bottom portion 10 described above.
c is configured to be able to enter the notch portion 38.

On the lower surface of the lower flange 39 extending horizontally from the lower end of the lower short side wall portion 27b, the above-mentioned bottom portion 1 is provided.
The short side wall hinge male part H4 is formed corresponding to the short side hinge female part H2 formed along the short side outer wall 13 of 0, and the short side wall male hinge H4 has a lower flange 39.
On the lower surface of the pair, a pair of support pieces h4 having a pair of lower end edges formed in a substantially semicircular shape and provided vertically with a predetermined interval, and a horizontal pin h5 bridged to the pair of support pieces h4 are configured. .
Reference numeral 40 denotes a protruding piece, which is vertically provided on the lower surface of the lower flange 39 by a predetermined number, similarly to the supporting piece h4 described above.
A connecting beam 41 that connects the support piece h4 with the protruding piece 40 and the adjacent protruding piece 40 is appropriately formed between the protruding piece 40 and the adjacent protruding piece 40. Reference numeral 42 denotes a concave portion formed between the projecting pieces 40 located in the central portion, and when the folding container is assembled, the short side convex portion 1 of the bottom portion 10 is formed.
8 is configured to be able to enter. Similarly, 43 is a pair of slit-shaped recesses formed between the protrusions 40, which are formed by the upper surface of the bottom portion 10 and the inner wall surface of the short side outer wall 13 when the folding container is assembled. The plate-shaped ribs 16 formed at the corners are configured to be able to enter.

At the central portion of the upper surface of the hinge female block H3 formed near both ends of the upper end of the lower short side wall portion 27b and in the central portion, a ridge 44 extending in the width direction of the lower short side wall portion 27b.
Are formed. Reference numeral 45a denotes a card pressing plate that extends upward from the center of the upper surface of the lower flange 39. In the present embodiment, two card pressing plates 45a are formed at a predetermined interval to form a card pressing plate. Between the plate 45a and the plate-like portion 46 of the lower short side wall portion 27b, the card pressing plate 45a is moved outward against its elasticity so that a gap into which a card can be inserted is formed. Is configured. 45b is a pair of card regulating vertical ribs formed on the plate-like portion 46 of the lower short side wall portion 27b located outside the pair of card retaining plates 45a. The upper portions of the pair of card regulating vertical ribs 45b are separated from each other. An inclined portion 45b1 inclined in the direction is formed, and the pair of card pressing plates 4 is formed.
A card insertion member 45 is configured by 5a and a pair of card regulating vertical ribs 45b. Incidentally, 47 is a card pressing plate 45 formed on the plate-like portion 46 of the lower short side wall portion 27b.
It is a mold insertion hole formed when a is injection-molded.

Reference numeral 48 is a substantially inverted U-shaped rib formed so as to surround the card insertion member 45, and both ends of the substantially inverted U-shaped rib 48 are connected to the lower flange 39. Four
Reference numeral 9 is a horizontal rib formed in an appropriate number on the plate-like portion 46 of the lower short side wall portion 27b, and 50 is similarly provided on an appropriate place of the plate-like portion 46 of the lower short side wall portion 27b. ,
An appropriate number of vertical ribs are formed, and the lower short side wall portion 27b
In order to reinforce, it can be formed as needed.

The upper short side wall portion 27a having the above-mentioned structure
The lower short side wall portion 27b and the lower short side wall portion 27b are provided in the slits 35 of the hinge female block H3 formed in the vicinity of the upper end portions of the lower short side wall portion 27b and in the central portion thereof. The horizontal pin h3 bridging the concave portion 28 formed in the above is inserted into the slit 35 so as to push open the entrance portion 35a of the slit 35, thereby being hinge-connected. The upper short side wall portion 27a is configured to be rotatable with respect to the lower short side wall portion 27b by the hinge portion formed by the hinge female block H3 and the horizontal pin h3. Then, in a state where the upper short side wall portion 27a and the lower short side wall portion 27b, which are hinge-connected, are arranged substantially flush with each other, the fitting protrusions provided near the vertical edges on both sides of the lower short side wall portion 27b. Piece 37 and lateral rib 49
The vertical ribs 50 and the like, and the locking projections 31 and the like protruding from the tongue piece 29 of the upper short side wall portion 27a are connected so as to be located on the same side, and as described later, the folding container is boxed. When assembled in a mold, assemble so that it is located outside the folding container. When the folding container is assembled in a box shape, the upper short side wall portion 27a and the lower short side wall portion 2 located inside the folding container are arranged.
The wall surface of 7b is preferably formed into a smooth surface with no unevenness, and such a smooth surface can prevent damage to the articles contained in the folding container.

Next, the long side wall 51 integrally formed of synthetic resin will be described with reference to FIGS. 7 and 8.

The long side wall 51 has a horizontally long plate-like portion 52, a lower flange 53 extending horizontally from the lower end of the horizontally long plate-like portion 52, and a horizontal flange extending from the upper end of the horizontally long plate-like portion 52. And a vertical flange 55 that is formed at both ends of the horizontally long plate-shaped portion 52 and connects both ends of the lower flange 53 and both ends of the upper flange 54. The long side wall 51 is included in the plate-like portion 52 surrounded by the vertical flange 55.
In order to reinforce, a suitable number of horizontal ribs 56 and vertical ribs 57 are formed as needed.

On the lower surface of the lower flange 53 of the long side wall 51, the long side wall hinge male part H1 corresponds to the long side hinge female part H1 formed on the inner upper surface of the long side bank 11 of the bottom part 10 described above. A portion H5 is formed, and the long side wall male hinge portion H5 has a pair of lower ends vertically erected at a predetermined interval on the lower surface of the lower flange 53, similarly to the short side wall male male portion H4 described above. Support piece h4 whose edge is formed in a substantially semicircular shape
And a horizontal pin h5 bridged to the pair of support pieces h4. 58 is on the lower surface of the lower flange 53,
A predetermined number of vertically projecting pieces similar to the above-mentioned supporting piece h4, and adjacent supporting pieces h4 and protruding pieces 58 are appropriately connected by a connecting beam 59. Reference numeral 60 denotes a concave portion formed between the projecting pieces 58 located in the central portion.
When the folding container is assembled, the long side convex portion 17 of the bottom portion 10 can be inserted. Similarly, 61 is a slit-shaped recess of an appropriate number formed between the projecting pieces 58, and the recess 61 has an upper surface of the long side bank 11 and a long side when the folding container is assembled. The plate-shaped ribs 15 formed at the corners formed by the inner wall surface of the outer wall 12 can be inserted.

Inside the upper end of the long side wall 51, the mounting surface 6 is placed.
A cutout portion 62 having 2a is formed. 63
Is a fitting piece which is provided in the vicinity of both ends of the inner wall surface 51a of the long side wall 51 at predetermined intervals in the vertical direction, and the fitting piece 63 includes both sides of the lower short side wall portion 27b. A vertically elongated through hole 63a into which the fitting projection piece 37 projecting near the vertical edge can be inserted. A bottom surface 64a is formed in the center of the upper end of the long side wall 51, and an inverted trapezoidal concave portion 64 that matches the mounting surface 62a is formed.
From 4a, the protrusion 65 along the width direction of the long side wall 51,
It is provided so as not to exceed the upper flange 54. In addition, 66 is a notch formed in the lower corners on both sides of the long side wall 52, and as will be described later, when the folding container is assembled into a box shape, the four corners of the bottom portion 10 described above are formed. A portion 14d located on the long side outer wall 12 side of the formed corner block 14 is configured to be able to enter.

Next, the bottom portion 10, the short side wall 27 and the long side wall 5
The work of assembling 1 into a folding container will be described.

To connect the short side wall 27 consisting of the above-mentioned hinged upper short side wall portion 27a and lower short side wall portion 27b to the bottom portion 10, it is formed along the short side outer wall 13 of the bottom portion 10. The short side wall male part H4 formed on the lower surface of the lower flange 39 of the lower short side wall part 27b in the gap between the hook h2 of the short side hinge female part H2 and the short side outer wall 13.
The horizontal pin h5 of
By hooking on the hook h2 of the short-side hinge female portion H2 of the bottom portion 10, the bottom portion 10 and the lower short side wall portion 27b forming the short side wall 27 are hinge-connected.

In order to connect the long side wall 51 to the bottom portion 10, the hook h2 of the long side hinge female portion H1 formed on the inner upper surface of the long side bank portion 11 of the bottom portion 10 and the long side outer wall 1 are connected.
The horizontal pin h5 of the long side wall male hinge H5 formed on the lower surface of the lower flange 53 of the long side wall 51 is fitted into the gap between the two, and the horizontal pin h5 is attached to the long side hinge female part of the bottom portion 10. The bottom portion 10 and the long side wall 51 are hinge-connected by being hooked on the hook h2 of H1. In this way, the bottom portion 10 and the short side wall 27 including the upper short side wall portion 27a and the lower short side wall portion 27b are hingedly connected,
In addition, the bottom portion 10 and the long side wall 51 are hinge-connected to each other, so that the folding container is assembled.

Next, the work of assembling the folding container in the folded state into a box shape will be described with reference to FIGS. 9 to 16.

In the folded state of the folding container shown in FIG. 12, the upper short side wall portion 27a and the lower short side wall portion 27b, which form the short side wall 27, are hinge-connected to the upper short side wall portion 27a. The lower short side wall portion 27b is superposed on the bottom portion 10 in a substantially flush state. In other words, both the upper short side wall portion 27a and the lower short side wall portion 27b are superposed on the bottom portion 10 in an expanded state.
Then, the long side wall 5 is formed on the upper short side wall portion 27a and the lower short side wall portion 27b which are overlapped on the bottom portion 10 in an expanded state.
1, the folding containers are folded as shown in FIG.

From the folded state of the folding container shown in FIG. 12, first, the long side wall 51, which has been overlaid on the upper short side wall portion 27a and the lower short side wall portion 27b which constitute the short side wall 27, is first of all. Is rotated in a substantially vertical state as shown in FIG.

Next, as shown in FIG. 13, the upper short side wall portion 27a and the lower short side wall portion 27 are kept in the expanded state.
b and are rotated in the vertical direction. Then, in the vicinity of both ends of the inner wall surface 51a of the long side wall 51 which is erected substantially vertically, a lower short part is formed in a through hole 63a formed in a fitting piece 63 projecting at a predetermined interval in the vertical direction. 10 and 14 show the upper short side wall portion 27a and the lower short side wall portion 27b in the expanded state by inserting the fitting protrusions 37 formed near the vertical edges on both sides of the side wall portion 27b. Stand almost vertically as shown in. After that, the upper short side wall portion 27a is
The upper short side wall portion 2 is rotated by rotating outward about a hinge portion formed by the hinge female block H3 and the horizontal pin h3.
The locking projections 31 projecting from the tongues 29 formed near both ends of the 7a are fitted into the horizontally long fitting holes 36 formed below the hinge female block H3 of the lower short side wall 27b. ,
As shown in FIGS. 9 and 15, the lower short side wall portion 2
The folding container is assembled in a box shape so that the upper short side wall portion 27a is overlapped with 7b.

A tongue piece 29 formed in the vicinity of both ends of the upper short side wall portion 27a is provided with a locking projection piece 31 projectingly provided on the lower short side wall portion 27b. When inserting into the fitting hole 36, the bulging portion 31b formed at the tip of the horizontal portion 31a of the locking projection 31 contacts the upper edge 36a of the fitting hole 36 of the lower short side wall portion 27b, The horizontal portion 31a of the locking projection 31 bends downward due to its elasticity, and as a result, the bulge portion 31b of the locking projection 31 passes through the fitting hole 36 of the lower short side wall portion 27b and is fitted. After passing through the fitting hole 36, the elasticity of the horizontal portion 31a of the locking projection 31 causes the horizontal portion 31a to return to the original horizontal state, and as shown in FIG. The bulging portion 31b of the hook catches on the upper edge 36a of the fitting hole 36, and the locking projection piece 1 of the bulging portion 31b is configured so as not to come out of the fitting hole 36 of the lower short side wall portion 27b. In addition, the locking protrusion 31 includes a pair of parallel slits 30.
Is formed on the tongue piece 29 formed by
Since the tongue piece 29 itself has elasticity like the locking projection piece 31, the locking work and the lower short length of the locking projection piece 31 can be performed by inserting the lower short side wall portion 27b of the locking projection piece 31 into the fitting hole 36. The unlocking operation by discharging the side wall portion 27b from the fitting hole 36 becomes easy.

When the upper short side wall portion 27a and the lower short side wall portion 27b are superposed on the tip of the tongue piece 29, the tongue piece 2
An inclined surface 29a is formed so that a wedge-shaped space is formed between the tip portion of 9 and the lower short side wall portion 27b. Upper short side wall portion 27a overlapped with lower short side wall portion 27b
Is rotated around a hinge portion constituted by the hinge female block H3 and the horizontal pin h3 to move the upper short side wall portion 27a.
When ejecting the locking projection 31 of the above from the fitting hole 36 of the lower short side wall portion 27b, a finger is used to form a gap formed between the tip portion of the tongue piece 29 and the lower short side wall portion 27b. Put it in
By lifting the tongue piece 29 upward, the locking projection 31
The bulged portion 31b of the engaging hole 36 is easily disengaged from the upper edge 36a of the fitting hole 36. Therefore, the unlocking work by discharging the lower short side wall portion 27b of the locking projection 31 from the fitting hole 36 becomes easier. .

In order to fold the folding container in the state of being assembled in the box shape shown in FIG. 9 as shown in FIG. 12, the reverse operation to the above-described assembling operation into the box shape is performed. By doing so, it can be folded. At the time of this folding work, the upper short side wall portion 27a, which is overlapped with the lower short side wall portion 27b, is rotated around the hinge portion formed by the female hinge block H3 and the horizontal pin h3, and the upper short side wall portion 27a is rotated. The locking projection 31 of the portion 27a is discharged from the fitting hole 36 of the lower short side wall portion 27b, and the upper short side wall portion 27a is rotated. This upper short side wall portion 27
During the turning operation of a, the upper short side wall portion 27a is further rotated from the vertical state toward the inside of the folding container, that is, the lower short side wall portion 27b and the upper short side wall portion 27.
In a state in which a is bent in an inverted V shape, or the upper short side wall portion 27a overlaps the lower short side wall portion 27b inside the folding container, the lower short side wall portion 27b and the upper short side wall portion 27a are formed. When the and are rotated in the direction of the bottom portion 10, the operator has to move the lower short side wall portion 27b and the upper short side wall portion 27.
There is a problem that extra work must be performed such that a and a are in a state where they are opened in a substantially flush manner, and thus the workability of the folding work of the folding container is deteriorated.

In order to solve the above-mentioned problems, the inward fall prevention projection 6 is provided near both ends of the upper end of the lower short side wall portion 27b.
7 is provided so as to project, and similar inward fall prevention projections 68 are provided vertically near both ends of the lower end of the upper short side wall portion 27a. Then, as shown in FIGS. 10 and 14, the upper short side wall portion 27a is substantially removed from the state where the lower short side wall portion 27b and the upper short side wall portion 27a of the folding container assembled in a box shape are overlapped. When the lower short side wall portion 27b and the upper short side wall portion 27a are turned substantially 180 degrees so that the lower short side wall portion 27b and the upper short side wall portion 27a are substantially flush with each other, the inward fall prevention projections 68 are vertically provided near the lower end portions of the upper short side wall portion 27a. However, FIG.
As shown in FIG. 6, the upper short side wall portion 27a is in the vertical direction from the vertical state, when the upper short side wall portion 27a abuts against the inward fall prevention protrusions 67 protruding near both ends of the upper end of the lower short side wall portion 27b. It is configured so that it can be prevented from rotating. With such a configuration, the above-mentioned problem can be solved, and therefore, the workability of the folding operation of the folding container is improved.

Further, in the present embodiment, the horizontally long fitting hole 36 formed below the hinge female block H3 of the lower short side wall portion 27b has the plate-shaped portion of the box-shaped convex portion 69 bulging outward. 46 is formed on the front wall 69a parallel to the upper wall 46, and the locking projections 31 projecting from the tongues 29 formed near both ends of the upper short side wall 27a have the box shape of the lower short side wall 27b. When the folding container is assembled in a box shape by being inserted into the fitting hole 36 formed in the front wall 69a of the convex portion 69, the lower short side wall portion 27b and the upper short side wall portion 27a are overlapped, The locking protrusion 31 is configured so as not to protrude beyond the inner wall surface 27b1 of the lower short side wall portion 27b into the folding container. With this configuration, it is possible to prevent the articles housed in the folding container assembled in the box shape from coming into contact with the locking projections 31 and being damaged.

Further, as shown in FIG. 11, a lower short side wall portion 27b forming a short side wall 27 is formed on the bottom portion 10.
When the upper short side wall portion 27a and the upper short side wall portion 27a are overlapped with each other in a substantially flush manner in an expanded state, the gap formed between the upper short side wall portions 27a of the opposite short side walls 27 is reduced. It is preferable to configure. When a large gap is formed between the upper short side wall portions 27a of the opposite short side walls 27. When an external force is applied from above to the long side wall 51 stacked on the gap, the long side wall 51 located above the gap does not have the upper short side wall portion 27a for supporting the external force, so that the long side wall 51 is Bends downward and will be damaged. As shown in FIG. 11, it is preferable that substantially no gap is formed between the upper short side wall portions 27a of the opposite short side walls 27. In addition, in FIG. 11, only the gap formed by the recess 32 formed in the upper short side wall portion 27a corresponds to the hand-held opening 33 formed in the lower short side wall portion 27b, and only the gap between the opposite short side walls 27 is formed. It is formed between the short side wall portions 27a.

Next, the stacking operation of the folding container assembled in the box shape will be described mainly with reference to FIGS. 18 to 22.

As shown in FIG. 18, the box-shaped folding container C1 located above and the box-shaped folding container C located below.
2 and 2 are stacked, and in this case, the folding container C1 assembled in a box-shape located on the upper side.
The inverted trapezoidal projecting wall 20 formed in the substantially central portion of the outer wall 11a constituting the long side bank portion 11 of the bottom portion 10 of the bottom wall 10 of the long side wall 51 of the folding container C2 assembled in the box shape below. As shown in FIG. 20, the ridges 65 that are inserted into the inverted trapezoidal recesses 64 formed in the center of the upper end portions and project from the bottom surfaces 64 a of the recesses 64 are the long sides of the bottom portion 10. It is configured to be inserted into a long side fitting recess 22 formed near the center of the side bank portion 11.
The fitting portion 19 of the bottom portion 10 of the upper folding container C1 is a cutout portion 62 formed on the long side wall 51 of the lower folding container C2. Folding container C that has been assembled in the box shape that is located inside
Outer wall 11a that constitutes the long-side bank portion 11 of the bottom portion 10 of No. 1
The lower end portion 11a1 of the above is configured to be placed on the upper flange 54 of the long side wall 51 of the folding container C2 that is assembled in the lower box. Further, the partition wall 21 that constitutes the long side fitting recess 22 of the bottom portion 10 of the folding container C1 that is assembled in the upper box shape.
Will be inserted into the gaps 70 located at both ends of the ridge 65 formed on the long side wall 51 of the folding container C2 that is assembled in the lower box. Therefore, the folding container C assembled in the box-shape located above
1 can be prevented from moving along the long side wall 51 of the lower box-shaped folded container C2, and the long side wall 51 of the lower box-shaped assembled container C2 can be prevented. However, due to the internal pressure of the contents and the weight of the box-shaped folding container C1 located above, it can be prevented from expanding outward.

Further, as shown in FIG. 18, a folding container C2 assembled in a box shape located below
When the folding containers C1 assembled in the upper box shape are stacked on top of each other, as shown in FIG. 22, the folding containers C1 assembled in the upper box shape are In the short side fitting concave portion 25 formed in the substantially central portion of the short side outer wall 13 of the bottom portion 10, in the central portion of the upper end of the lower short side wall portion 27b of the folding container C2 assembled in the lower box. The ridge 44 projecting from the upper surface of the formed hinge female block H3 is inserted. In addition, the fitting portion 19 of the bottom portion 10 of the folding container C1 that is assembled in the box shape located above
Goes into the inner side of the ridge 44 of the hinge female block H3 formed near both ends of the upper end of the lower short side wall portion 27b of the box-shaped folding container C2 located below and at the center, and moves upward. The lower end portion 13a of the short side outer wall 13 of the bottom portion 10 of the box-shaped folding container C1 positioned is configured to be placed on the upper surface 71 of the hinge female block H3 positioned outside the ridge 44. ing. Therefore, it is possible to prevent the folding container C1 assembled in the upper box-shaped container from moving along the short side wall 27 of the folding container C2 assembled in the lower box-shaped container, It is possible to prevent the short side wall 27 of the box-shaped folded container C2 from expanding outward due to the internal pressure of the contents and the weight of the box-shaped folded container C1 located above.

As described above, in the present invention, the short side wall 27 is divided into the upper short side wall portion 27a and the lower short side wall portion 27b via the hinge portion, and the upper short side wall portion 2 is formed.
7a and the lower short side wall portion 27b do not overlap each other,
Since it is configured to be stacked on the bottom 10 in the expanded state, the short side wall 27 stacked on the bottom 10 can be made thinner than the conventional short side wall 3, Therefore, since the height of the bottom portion 10 can be kept low, the overall height of the folded container in the folded state is reduced, the storage efficiency of the folded container in the folded state is improved, and the storage space is reduced. .

Further, the long side wall 51 and the short side wall 27 are engaged with each other by the through hole 63a of the fitting piece 63 formed in the long side wall 51.
While inserting the fitting projecting piece 37 formed on the lower short side wall portion 27b into the above, the upper short side wall portion 27a is rotated outward so as to overlap the lower short side wall portion 27b, and the upper short side wall portion 27a. The locking projection 31 formed on the lower side wall 2
Since the long side wall 51 and the short side wall 27 in the assembled state are engaged with each other, the long side wall 51 and the short side wall 27 are engaged with each other. Even if external force is applied, it will not be released. Moreover, the through hole 63a of the fitting piece 63 formed in the long side wall 51
Since the fitting projecting piece 37 formed on the lower short side wall portion 27b is only inserted into the lower short side wall portion 27b, as described above, the upper short side wall portion 27a is arranged around the hinge portion.
In the process of rotating the upper short side wall portion 27a and the lower short side wall portion 27b toward the bottom portion 10 while rotating the upper short side wall portion 27a in the direction away from b, the lower short side wall portion 27a is rotated.
The fitting protrusion 37 formed on the b side is the through hole 63 of the fitting piece 63 formed on the long side wall 51 without any other operation.
Since it is configured to come out of a, the workability of the folding work of the folding container is improved.

Further, in the present invention, the short side wall 27 is
An upper short side wall portion 27a and a lower short side wall portion 2 which are hinge-connected to each other.
Since it is formed by two plate-shaped members 7b and 7b, the short side wall 27 in a box-shaped assembled state is stronger in strength than the short side wall formed by one conventional plate-shaped member. .

As shown in FIGS. 9 and 15, when the folding container is assembled in a box shape, as described above, the lower short side wall portion 27b and the upper short side wall portion 27a overlap each other. And the lower short side wall portion 27b
Handheld opening 33 and upper short side wall 27a formed in
It is configured so that the concave portion 32 formed in the above-mentioned substantially matches. In addition, the lower short side wall portion 27b and the upper short side wall portion 27a
In the state in which and overlap, the central portion 34a1 of the U-shaped portion 34a of the flange 34 formed in the central portion region of the upper end of the upper short side wall portion 27a has the hand-held opening formed in the lower short side wall portion 27b. The substantially vertical portion 34a2 of the U-shaped portion 34a, which is located on the horizontal rib 49a extending horizontally from the upper edge of the portion 33, extends vertically from the side edge of the handheld opening 33. It is configured to be located inside the vertical rib 50a. Further, a cutout 72 is formed at the end of the horizontal portion 34b located on the U-shaped portion 34a side, and when the lower short side wall portion 27b and the upper short side wall portion 27a overlap each other, a cutout 72 is formed. A vertical rib 50a extending vertically from the side edge of the handheld opening 33 is formed in the notch 72.
Is configured to be inserted.

In the present invention, as described above, the bottom surface 64 of the recess 64 formed at the center of the upper end of the long side wall 51.
The ridge 65 projecting from a is formed so as not to exceed the upper flange 54, and is formed on the lower short side wall portion 27b forming the short side wall 27 when the folding container is assembled in a box shape. The ridges 44 projecting from the upper surface of the hinge female block H3 are
It is configured not to exceed the upper flange 54 of No. 1. Therefore, when the plate material is placed on the folding container assembled in a box shape and the folding container or the box container is further placed on the plate material, the plate material is It can be placed on the upper flange 54 of the long side wall 51 without abutting against the 44 and 65. In addition, when directly stacking other folding containers, box containers, etc. on the folding container in the box-shaped assembled state, the above-mentioned ridges 44, 65 are
Since it does not project from the upper flange 54 of the long side wall 51, other folding containers, box containers, etc. can be horizontally and stably maintained in the upper flange 5 of the long side wall 51.
4 can be stacked.

Further, since the ridge 65 is formed at the center of the upper end of the long side wall 51, which has the least effect on the dimensional accuracy of the folding containers, it is possible to stack the folding containers assembled in a box shape in a stack. It is possible to minimize the looseness of fitting, and thus improve the stability of the folding containers assembled in a box shape in stacking.

Next, another embodiment of the present invention will be described with reference to FIGS.

From the folded state of the folding container shown in FIG. 12, as shown in FIG.
In the case of assembling in a box shape, as shown in FIG. 11, first, the long side wall 51 is erected substantially vertically, and then,
The upper short side wall portion 27a and the lower short side wall portion 27b, which form the short side wall 27, are rotated in the vertical direction in the expanded state. However, in the above-described embodiment, this rotation work is performed. Through holes formed in the fitting pieces 63 formed in the vicinity of the vertical edges on both sides of the lower short side wall portion 27b, and in the fitting pieces 63 formed in the vicinity of both ends of the inner wall surface 51a of the long side wall 51. 63
Although it is configured to be simply inserted into a, in the present embodiment, the tip end of the fitting protrusion 37 is directed toward the central portion of the lower short side wall portion 27b, that is, toward the handheld opening 33. When the extending hook portion 37a is provided and the fitting projection piece 37 is inserted into the through hole 63a formed in the fitting piece 63, the hook portion 37a is attached to the outer frame 63b of the fitting piece 63. It is configured to fit into the formed recess 63b1 and to be locked to the outer frame 63b of the fitting piece 63. In this way, the fitting protrusion 37 formed on the lower short side wall portion 27b is
Through hole 6 formed in fitting piece 63 protruding from long side wall 51
Since the hook portion 37a formed on the fitting protrusion 37 while being inserted into the fitting 3a is configured to engage with the outer frame 63b of the fitting piece 63, the lower short side wall portion 27 can be reliably held.
b is locked to the long side wall 51, and the lower short side wall portion 27b is
It is possible to prevent it from falling toward the bottom portion 10, and
The workability of assembling the folding container is improved.

Further, in the present embodiment, the fitting protrusions 37 are provided near the vertical edges on both sides of the upper short side wall portion 27a in the expanded state of the lower short side wall portion 27b and the upper short side wall portion 27a.
An insertion protrusion 73 is formed that extends in the same direction as.
Then, as described above, the fitting projecting piece 37 formed on the lower short side wall portion 27b is fitted to the fitting piece 6 projecting on the long side wall 51.
The hook portion 37a formed on the fitting projection piece 37 is inserted into the through hole 63a formed in the hole 3, and after the hook portion 37a is locked to the outer frame 63b of the fitting piece 63, the upper short side wall portion 27a is removed. ,
The hinge is constituted by a hinge portion constituted by the hinge female block H3 and the horizontal pin h3, and the hinge portion is rotated outward, but is formed near vertical edges on both sides of the upper short side wall portion 27a during the rotation of the upper short side wall portion 27a. The inserted projecting piece 73 is inserted into the inner frame 63c of the fitting piece 63 projecting from the long side wall 51 and the through hole 63a already formed in the fitting piece 63. Is formed in the fitting projection piece 37 by being inserted into a gap formed between the fitting projection piece 37 formed in The hook portion 37a is configured to securely engage with the outer frame 63b of the fitting piece 63. After that, the upper short side wall portion 2
The locking projections 31 formed near both ends of 7a are fitted into the horizontally long fitting holes 36 formed below the hinge female block H3 of the lower short side wall portion 27b, and are shown in FIGS. 9 and 15. As described above, the upper short side wall portion 27a is overlapped with the lower short side wall portion 27b, and the folding container is assembled into a box shape. As described above, the insertion protrusions 7 formed near the vertical edges on both sides of the upper short side wall portion 27a.
3 presses the fitting projection piece 37 toward the outer frame 63b of the fitting piece 63, and the hook portion 37a formed on the fitting projection piece 37 becomes
Since it is configured to be securely locked to the outer frame 63b of the fitting piece 63, the upper short side wall portion 27a and the lower short side wall portion 2 are formed.
The short side wall 27 composed of 7b and the long side wall 51 are securely engaged with each other, and it is possible to prevent a trouble that the engagement state between the short side wall 27 and the long side wall 51 is released.

Further, a substantially U-shaped protrusion 74 is provided around the locking projection 31 formed on the upper short side wall portion 27a along the lower side and both sides of the locking projection 31. There is. Abbreviation U
As shown in FIGS. 9 and 15, the V-shaped protruding portion 74 has a lower short side wall portion 27 b and an upper short side wall portion 27 b.
When a is overlapped, it is configured to be positioned close to the upper side and both sides of the box-shaped convex portion 69 formed on the outer wall surface of the lower short side wall portion 27b and having the fitting hole 36 formed therein. There is.
With this configuration, when the folding container is assembled in the box shape, the lower short side wall portion 27 is formed.
Since horizontal and downward movement of the upper short side wall portion 27a with respect to b is suppressed, rattling of the upper short side wall portion 27a is reduced, and the short side wall 27 including the upper short side wall portion 27a and the lower short side wall portion 27b is reduced. When a load is applied to the lower short side wall portion 27 from above or laterally,
Since it can be borne by the box-shaped convex portion 69 formed in b and the substantially U-shaped protruding portion 74 formed in the upper short side wall portion 27a arranged in the vicinity of the convex portion 69, It is possible to prevent the locking projection 31 formed on the upper short side wall portion 27a from being damaged.

Next, another embodiment will be described with reference to FIGS. 27 and 28.

In the above-described embodiment, as shown in FIG. 1, FIG. 2, FIG. 4, etc., the short side outer wall 1 of the bottom portion 10 is formed.
A projecting wall 23 is formed in a substantially central portion of 3, and the projecting wall 23, the short side side wall 19b of the fitting portion 19, the pair of partition walls 24, and the like form a short side fitting concave portion opened downward. 25 are formed. Then, as shown in FIG. 18, when the folding container C1 assembled in a box shape located above and the folding container C2 assembled in a box shape located below are stacked, In the short side fitting recess 25 formed in the approximate center of the short side outer wall 13 of the bottom 10 of the folding container C1 located at the center of the upper end of the lower short side wall portion 27b of the folding container C2 located below. The ridge 44 projecting from the upper surface of the hinge female block H3 formed in is inserted. With this configuration, it is possible to prevent the folding container C1 assembled in the upper box-shaped container from moving along the short side wall 27 of the folding container C2 assembled in the lower box-shaped container. In addition to the above, the short side wall 27 of the folding container C2 that is assembled in the box-shaped container located below the internal pressure of the contents and the folding container C1 that is assembled in the box-shaped container located above
It is possible to prevent the product from bulging outward due to the weight. However, for example, when the short side wall 27 of the folding container C2 that is assembled in the lower box is curved outward due to the internal pressure of the contents, the hinge female block of the lower folding container C2 is used. There is a problem that the protrusion 44 protruding from the upper surface of H3 is not inserted into the short side fitting concave portion 25 formed in the substantially central portion of the short side outer wall 13 of the bottom portion 10 of the folding container C1 located above. May occur.

In order to solve the above-mentioned problem, in this embodiment, the projecting walls 23 are formed near both ends of the short side outer wall 13 of the bottom portion 10, and similar to the above-mentioned embodiment. In addition, the short side wall 1 of the protruding wall 23 and the fitting portion 19
9b and the pair of partition walls 24 and the like form a short side fitting recess 25 having an opening at the bottom. Then, the folding container C1 assembled in a box shape located above
And the folding containers C2 assembled in a box shape located below are stacked, the short sides formed in the approximate center of the short side outer wall 13 of the bottom 10 of the folding container C1 located above. Into the side fitting concave portion 25, the protrusion 44 protruding from the upper surface of the hinge female block H3 formed at the center of the upper end of the lower short side wall portion 27b of the folding container C2 located below is inserted and At both ends of the lower short side wall portion 27b of the lower folding container C2 in the short side fitting recesses 25 formed near both ends of the short side outer wall 13 of the bottom portion 10 of the folding container C1. The ridge 44 protruding from the upper surface of the hinge female block H3 formed in the vicinity is inserted.

As described above, the three short side fitting recesses 25 formed near the center and both ends of the short side outer wall 13 of the bottom portion 10 of the folding container C1 located above.
3 formed near the center and both ends of the upper end of the lower short side wall portion 27b of the folding container C2 located below.
Since the three convex ridges 44, which are respectively provided on the upper surfaces of the individual hinge female blocks H3, are configured to be inserted, the short side wall 27 of the folding container C2 that is assembled in a box shape located below is formed. It is possible to reliably prevent outward bulging.

Even when the short side wall 27 of the folding container C2 that is assembled in the box-shape located below is curved outward, the short side wall 27 at both ends thereof is smaller than the central part. Since it is not greatly curved, the short side fitting recess 25 formed in the approximate center of the short side outer wall 13 of the bottom portion 10 of the folding container C1 located above is provided with the folding container C2 located below. Even if the protruding strip 44 protruding from the upper surface of the hinge female block H3 formed at the center of the upper end of the lower short side wall portion 27b is not inserted, the short side of the bottom portion 10 of the folding container C1 located above. In the two short side fitting recesses 25 formed near both ends of the outer wall 13, two short side fitting recesses 25 formed near both ends of the upper end of the lower short side wall portion 27b of the folding container C2 located below. Since two projecting ridges 44 respectively projectingly provided on the upper surface of the female female block H3 are inserted, it is possible to prevent outward expansion of the short side wall 27 of the folding container C2, which is assembled in the lower box-shaped container. In addition, it is possible to prevent the folding container C1 assembled in the upper box shape from moving along the short side wall 27 of the folding container C2 assembled in the lower box shape.

Further, as described above, near the both ends of the short side outer wall 13 of the bottom part 10, the protruding wall 23, the short side wall 19b of the fitting part 19, the pair of partition walls 24, etc. Since the opened short-side fitting concave portion 25 is formed, the rigidity and the compression strength of the bottom portion 10 are enhanced, and by extension, the rigidity and the compression strength of the folding container are improved. Therefore, more folding containers can be stacked in a stable state.

In the above-described embodiment, the projecting wall 20 is formed substantially at the center of the outer wall 11a constituting the long side bank portion 11 of the bottom 10, and the projecting wall 20 and the long side wall 19a of the fitting portion 19 are formed. A pair of partition walls 21 and the like form a single long-side fitting concave portion 22 having an opening at the bottom.
The projecting wall 20 and the pair of partition walls 21 are formed near both ends of the outer wall 11a forming the long side bank portion 11 of 0.
It is also possible to form the individual long side fitting recesses 22. Thus, the outer wall 1 that constitutes the long-side bank portion 11 of the bottom portion 10
When the long-side fitting recess 22 is formed near both ends of the la, the long-side fitting recess 22 formed near both ends.
Corresponding to the above, the above-described recess 64 is formed at both ends of the upper end of the long side wall 51, and the bottom surface 64a of the recess 64 is formed.
In this case, the ridge 65 is projected. With such a configuration, when the folding containers assembled in the box shape are stacked, in the case where the long side wall 51 of the folding container C2 assembled in the lower box shape is curved outwardly, However, since the long side wall 51 is not largely curved at both ends of the long side wall 51 as compared with the central part, the long side wall 51 is formed substantially at the central part of the long side bank portion 11 of the bottom part 10 of the folding container C1 located above. Folding container C2 located below in the long side fitting recess 22
Even when the convex strip 65 projecting from the center of the upper end of the long side wall 51 is not inserted, it is formed near both ends of the long side bank portion 11 of the bottom portion 10 of the folding container C1 located above. Into the two long side fitting concave portions 22, the convex strips 65 projecting near both ends of the upper end of the long side wall 51 of the folding container C2 located below are inserted, so that the box located below It is possible to prevent outward bulging of the long side wall 51 of the folding container C2 assembled in the mold, and the folding container C1 assembled in the upper box is assembled in the lower box. It is also possible to prevent the folding container C2 from moving along the long side wall 51.

In the above-described embodiment, when the folding container is assembled in a box shape, the upper short side wall portion 27a forming the short side wall 27 is approximately one third above the lower short side wall portion 27b. The upper short side wall portion 27a and the lower short side wall portion 27b are configured to overlap each other.
And, as shown in FIG.
a and the lower short side wall portion 27b do not overlap each other but are in an expanded state, and when the tip portions of the upper short side wall portion 27a do not overlap with each other when they are stacked on the bottom portion 10, the folding container is a box. The upper short side wall portion 27a may be configured so as to overlap with the lower short side wall portion 27b by approximately half when assembled in a mold.

[0063]

Since the present invention has the constitution described above, it has the following effects.

The short side wall is composed of an upper short side wall portion and a lower short side wall portion connected via a hinge member, and the long side wall and the short side wall are engaged with each other by a fitting piece formed on the long side wall. The fitting projection piece formed on the lower short side wall portion forming the short side wall is inserted into the through hole, and the hook portion of the fitting projection piece is locked to the fitting piece. As a result, the height of the folded container in the folded state is lowered, so the storage efficiency of the folded container in the folded state is improved, the storage space is reduced, and the lower short side wall portion is surely Locked to the long side wall,
It is possible to prevent the lower short side wall portion from falling toward the bottom portion, so that the workability of assembling the folding container is improved.

On the outer wall surface of the lower short side wall portion, a box-shaped bulging portion having a fitting hole is formed, and the fitting hole bored in the bulging portion has an upper short portion. Since the locking projection formed on the side wall portion is fitted, engagement and disengagement of the upper short side wall portion and the lower short side wall portion which form the short side wall,
Since it can be performed easily and in a short time, workability of the assembling work and the folding work of the folding container is improved.

Insert protrusions are formed near the vertical edges on both sides of the upper short side wall, and the insert protrusions are formed in the inner frame of the fitting piece protruding from the long side wall and the fitting piece. Since it is configured to be inserted into the gap formed between the fitting projecting piece formed in the lower short side wall part that is inserted in the through hole, the insertion projecting piece is
Since the fitting projection piece is pressed in the outer frame direction of the fitting piece and the hook portion formed on the fitting projection piece is securely engaged with the fitting piece,
The short side wall including the upper short side wall part and the lower short side wall part is reliably engaged with the long side wall, and it is possible to prevent a trouble in which the engagement state between the short side wall and the long side wall is released. .

Around the locking projection formed on the upper short side wall, a substantially U-shaped projection is provided below and on both sides of the locking projection, and the lower short side wall is provided with a protrusion. On the other hand, when the upper short side wall portions are overlapped with each other, the substantially U-shaped protruding portion is formed on the outer wall surface of the lower short side wall portion, and the fitting hole is formed in the box-shaped bulging portion. Since it is configured to be positioned close to the upper side and both sides of the container, the horizontal and downward movement of the upper short side wall portion with respect to the lower short side wall portion is suppressed when the folding container is assembled in a box shape. The rattling of the upper short side wall portion is reduced, and when a load is applied to the short side wall consisting of the upper short side wall portion and the lower short side wall portion from above or in the lateral direction, this load is formed in the lower short side wall portion. Formed on the box-shaped bulging part and the upper short side wall part that is arranged close to the bulging part It is possible to bear by a substantially U-shaped projecting portion that can lock protrusion formed on the upper short side wall portion is prevented such that damage.

[Brief description of drawings]

FIG. 1 is a perspective view of a bottom portion of a folding container according to the present invention.

FIG. 2 is a perspective view of the bottom portion shown in FIG. 1 as viewed from the back surface direction.

FIG. 3 is a partial enlarged perspective view of the bottom portion shown in FIG.

4 is a partially enlarged perspective view of the bottom portion shown in FIG. 2 viewed from the back surface direction.

FIG. 5 is an exploded perspective view of a short side wall of the folding container according to the present invention.

FIG. 6 is an exploded perspective view of the short side wall of the folding container according to the present invention.

FIG. 7 is a perspective view of a long side wall of the folding container according to the present invention.

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

FIG. 9 is a perspective view of the folding container of the present invention assembled in a box shape.

FIG. 10 is a perspective view of the folding container according to the present invention during folding or assembling.

FIG. 11 is a perspective view of the folding container according to the present invention during folding or assembling.

FIG. 12 is a perspective view of the folding container of the present invention in a folded state.

FIG. 13 is a partially enlarged perspective view of the folding container according to the present invention during folding or assembly.

FIG. 14 is a partially enlarged perspective view of the folding container according to the present invention during folding or assembling.

FIG. 15 is a partially enlarged perspective view of the folding container of the present invention assembled in a box shape.

FIG. 16 is a vertical cross-sectional view taken along the long side wall of the folding container according to the present invention assembled in a box shape.

FIG. 17 is a vertical cross-sectional view taken along the long side wall of the folding container of the present invention in a state where the upper short side wall portion constituting the short side wall is rotated approximately 180 degrees from the box-shaped assembled state.

FIG. 18 is a perspective view showing a stacking state of folding containers assembled into two box shapes according to the present invention.

FIG. 19 is a partially enlarged perspective view of the folding containers assembled into the two box shapes of the present invention immediately before being stacked.

FIG. 20 is a partial vertical sectional view taken along the long side wall of the folding container in which the two box-shaped folding containers of the present invention are stacked.

FIG. 21 is a partially enlarged perspective view of a state in which the folding containers assembled into the two box-types of the present invention are in a state immediately before being stacked.

FIG. 22 is a partial vertical cross-sectional view taken along the long side wall of the folding container in which the two box-shaped folding containers of the present invention are stacked.

FIG. 23 is an exploded perspective view of a short side wall of another embodiment of the folding container according to the present invention.

FIG. 24 is a partially enlarged perspective view of the folding container according to the embodiment shown in FIG. 23 during folding or assembling.

FIG. 25 is a partially enlarged perspective view of the folding container of the embodiment shown in FIG. 23 during the same folding or assembling.

FIG. 26 is a bottom perspective view of yet another embodiment of the folding container of the present invention.

27 is a perspective view of the bottom portion shown in FIG. 26 as viewed from the back surface direction.

FIG. 28 is a perspective view of a conventional folding container assembled in a box shape.

FIG. 29 is a perspective view of a conventional folding container during folding or assembly.

FIG. 30 is a perspective view of a conventional folding container in a folded state.

[Explanation of symbols]

10: bottom 27 ... Short side wall 27a ..... upper short side wall 27b ・ ・ ・ ・ ・ ・ Lower short side wall 37 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Mating protrusion 37a --- Hook part 51 ・ ・ ・ ・ ・ ・ ・ ・ long side wall

Claims (4)

[Claims] 1. A folding container that is assembled into a box-shaped container by vertically standing a long side wall in a folded state with respect to a bottom and then standing a short side wall in a folded state with respect to a bottom. In the above, the short side wall is constituted by an upper short side wall part and a lower short side wall part connected via a hinge member, and the long side wall and the short side wall are engaged with each other by a fitting piece formed on the long side wall. By inserting the fitting projection piece formed on the lower short side wall portion forming the short side wall into the through hole, and locking the hook portion of the fitting projection piece with the fitting piece. A folding container that is characterized by 2. A box-shaped bulging portion having a fitting hole formed therein is formed on the outer wall surface of the lower short side wall portion, and the fitting hole formed in the bulging portion is formed with: The folding container according to claim 1, wherein a locking projection formed on the upper short side wall portion is fitted therein. 3. An insertion projecting piece is formed in the vicinity of vertical edges on both sides of the upper short side wall portion, and the insertion projecting piece is formed on the inner frame of the fitting piece projecting on the long side wall and the fitting piece. The device is configured to be inserted into a gap formed between a fitting projecting piece formed on a lower short side wall part that is inserted into a drilled through hole. The folding container described in 2. 4. A substantially U-shaped projecting portion is provided around the locking projection formed on the upper short side wall along the lower side and both sides of the locking projection, and the lower short side wall is provided. When the upper short side wall portion is overlapped with the portion, the substantially U-shaped projecting portion is formed in the outer wall surface of the lower short side wall portion and has a box-shaped expansion formed with a fitting hole. It is constituted so that it may be located close to the upper part and both sides of the projecting part.
Folding container as described in paragraph.