JP2772327B2 - Foldable container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable container which can be easily folded and requires no space for return transportation. In particular, the present invention relates to a foldable container capable of storing articles to be cooled and transported. More particularly, the present invention relates to a foldable container which is formed by containing an insulating resin but can be folded, and can be folded and transported without taking up space when returning the container after transporting the cooling article.

[0002]

2. Description of the Related Art Conventionally, as a container for cooling or transporting a frozen product, a container formed of a foamed resin such as styrofoam or the like (a so-called toro box) is used on a fish shore or the like. However, although it is very widely and commonly used, it is easily soiled, cannot be folded, takes up the same volume, space and is inefficient when returned.

[0003] On the other hand, it is designed to be folded,
Containers formed in a specific shape, that is, so-called oricons (foldable containers) are provided (for example, Japanese Utility Model Laid-Open No. 4-97030). This is one in which a resin plate or a foamed resin molded article that has been injection-molded is incorporated in a resin mold. Since the manufacturing cost is high, there is a tendency that actual use is hesitant. Further, in a configuration having a foamed resin surface, dirt is liable to occur, and dirt hardly falls.

[0004] Toro boxes made of foamed resin are widely and generally used. However, when dirt is severe or when they are partially damaged, they must be amortized, and in that case, environmental problems may occur. In addition, the conventional foldable container as described above is space-efficient and can be used repeatedly, but the biggest problem is that the cost is high and the actual adoption is difficult. is there.

[0005] Furthermore, the container which can be folded is
Conventionally, it has been proposed (for example, Japanese Utility Model Application Laid-Open No. 60-1677).
No. 33, JP-A-63-96031, JP-A-4-214
No. 738), which uses a frame and is provided with two facing side plates that can be folded from the center of the frame and a facing tilt plate that is rotatable. Therefore, the structure becomes complicated, and as a result, the cost becomes high. In addition, an assembly that is bent and assembled with a hinge is also proposed (see Japanese Utility Model Application Laid-Open No. 59-118723). However, the assembly is not integrated and folded, but the face plates are simply removed and stacked. Therefore, it has a complicated structure, is expensive, and is not one that is integrally folded, so that handling is troublesome.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a foldable container capable of significantly reducing the manufacturing cost. In addition, the present invention is easy to dirt,
An object of the present invention is to provide a foldable container which is difficult to attach, can be manufactured at low cost, and is easily adopted. Also insulation,
That is, it is an object of the present invention to provide a heat-insulating foldable container structure which is easy to manufacture by wrapping a foamed resin and is inexpensive.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned technical problem, and is constituted by a rectangular parallelepiped having six faces, and comprising five face plates excluding the upper surface thereof. In the foldable container which is bent at a substantially ridge end portion, among the five face plates, except for the bottom plate, when assembled, the four side plates constituting the side surface are hinged at the end portions and are continuously connected by four hinge connection portions. The two facing hinge connection portions form a hinge connection portion in which the face plates of the connection can be bent from 90 degrees to 0 degrees, and the other two facing hinge connection portions have the face plates of the connection there. Can be bent from 90 degrees to 180 degrees, and the width of the hinge connection portion has a width margin corresponding to the thickness of the bottom plate, and the bottom side of one of the four side plates is Near the end The bottom plate is connected at a hinge connection portion that can be bent from 90 degrees to 180 degrees, and further, when assembled near at least one bottom end of another of the four side plates, when the bottom plate is assembled. Characterized in that the container has an elongated projection that engages the end of the container.

[0008] Five face plates (A, B, C, D, E)
The four side plates (A, B, C, D) constituting side surfaces when assembled with the bottom plate (E) are hinge connection portions (3-5, 4).
-6) as a development form connected through a blow molding method, as a double structure having hollows (1 and 2), integrally molded and formed with a desired porous resin (2) to form a double structure. Is a structure filled into the hollow interior of the container, and thus has a heat insulating property, is configured into a foldable container, and two side plates at both ends of the integrally formed four side plates (A, B, C, D) Connect the ends of (A, D) to the hinge connection part (6)
Therefore, the structure of the connection is preferable. The long hinge connection portions (4, 6) that can be bent from 90 degrees to 0 degrees have at least the width of the thickness of the side plate, and the end surfaces of the corresponding side plates are separated from the outer end of the corresponding end surface. Extends perpendicularly to the outer end of the end face of the corresponding side plate,
One end has a hinge part (4), and when the corresponding side plate is bent at 90 degrees and assembled, the right angle of the end surface of the corresponding side plate is in contact with the end surface of the other corresponding side plate. The hinge connection portions (3, 5), which are engaged at right angles to the connection portion and can be bent from 90 degrees to 180 degrees, have a width plate (5) almost as high as the thickness of the bottom plate. A long hinge portion (3) is provided at an inner end of the width plate, and the long width plate (5) is moved from an end of the corresponding side plate to an inner surface of the side plate. At right angles, it has a height and an extension corresponding to the thickness of the bottom plate, and its long hinge portion (3) is capable of bending the corresponding side plate from 90 degrees to 180 degrees, and when assembled, corresponds to the corresponding side plate. The end surface of the side plate and the end surface of the width plate are engaged with the collision surface (see FIG. 4). When folding the Nah, 1
It is preferable that the long hinge portion (3) is bent at an angle of 80 degrees (see FIG. 5) and the long hinge portion (3) is bent at a right angle.

The foldable container according to the present invention has the following aspects. That is, in general, a porous resin, that is, a foamed resin has excellent heat insulating properties and is used in forming a conventional toro box. The corners are easily broken and easily lost. Further, in order to form a specific shape, a mold and a molding are required, and the production cost includes a mold cost, so that the cost is high. Further, by covering the surface of the porous resin with a resin film or the like, it is possible to overcome the disadvantage that the porous resin molded product is easily broken and easily stained, but the manufacturing cost is increased.

Further, if the heat insulating board covered with the resin film is directly cooled, frozen, placed outdoors, or roughly handled, it is easily damaged and rapidly deteriorates. When the structure is fixed to the end molding member made of resin so as to cover the end of the board,
Further, the manufacturing cost is increased. Furthermore, such a structure results in very high manufacturing costs.

On the other hand, in the foldable container of the present invention, as shown in the drawing, the blow molding method has a double structure.
This is a method of molding a foldable container member at a time, and is produced by a manufacturing method of filling a heat insulating resin, that is, a porous resin or a foamed resin, into a hollow interior of a double structure formed by blow molding, if desired. . As a result, the manufacturing cost was significantly reduced.

That is, first, the entire foldable container member is molded at a time by blow molding. Blow molding is a low-pressure method compared to injection molding, which is high-pressure molding.
The mold can be made of a zinc or aluminum alloy, can be easily processed and formed, and the processing cost can be reduced. Furthermore,
The use of inexpensive metals and alloys as described above also reduces material costs, and as a whole, the cost of the mold is significantly reduced. In addition, the blow-molded product can also increase the specific strength, so that the choice of raw materials used for the molded product can be widened,
In the blow molding, since the molding temperature can be generally lowered, the production cost can be significantly reduced as a whole.

The most important feature of the foldable container of the present invention is also the blow molding method, in which the double-structured wall can be formed in an asymmetric shape as shown, because the hinge between the face plates of the foldable container is formed. Fold the connection part 90 degrees,
Also, return to 0 degrees (ie, flatten) or 1
Since it is necessary to bend by 80 degrees, the wall structure of the double structure is asymmetric at each hinge connection portion between the face plate members, and the one that is biased to either side is suitable for bending. However, even with symmetry, 90 degrees and 18 degrees
It suffices if it can be easily bent to 0 degrees, and it is not particularly necessary to specify the shape of the hinge connection part.
However, a flexible film is generally used.

For example, the hinge connection portion that can be bent from 90 degrees to 0 degrees has a width of at least the thickness of the side plate, and extends from the outer end of the corresponding end surface of the side plate perpendicularly to the end surface. When the corresponding side plate is bent at 90 degrees and assembled, the right angle of the end surface of the corresponding side plate is hinged to the end surface of the other corresponding side plate. It engages at a right angle made by the connecting portion. The hinge connection portion that can be bent from 90 degrees to 180 degrees has a width plate having a height substantially equal to the thickness of the bottom plate, and a long hinge portion is provided at an inner end of the width plate. The width plate of the corresponding side plate from the end,
At right angles to the inner surface of the side plate, it extends at a height corresponding to the thickness of the bottom plate, and its long hinge portion is capable of bending the corresponding side plate from 90 degrees to 180 degrees. The end face of the corresponding side plate and the end face of the width plate are in contact with each other, and when the foldable container is folded, it is bent 180 degrees and its long hinge portion is bent at a right angle. The width plate allows the bottom plate to be inserted between the two folded left and right side plates when folded.

As a resin for forming a double structure by the blow molding method as described above, a semi-soft resin is generally suitable. For example, polypropylene, soft vinyl chloride, polyurethane, ABS, polyethylene, phenolic resin and the like can be used, and polypropylene is most preferred. However, not limited to these resins, any resin can be used as long as it satisfies economical aspects, manufacturing costs, blow moldability, and demand. The blow molding method is suitable for high-mix low-volume production, and the folding container of the present invention can provide folding containers of various shapes at low cost.

That is, as the porous resin to be filled in the interior of the double structure, that is, the foamed resin, a resin having a large heat insulating property and a resin advantageous in terms of cost are used. In particular, when high heat insulation is expected, urethane foam having heat insulation about twice that of styrene resin is preferable.

Next, the structure of the foldable container of the present invention will be described. As shown, the collapsible container of the present invention has an expanded five-sided shape that can be assembled into a hexahedron, i.e., a shape lacking the upper surface of a rectangular parallelepiped, so as to have a trough-box shape. To Therefore, the foldable container of the present invention can be provided with an appropriate lid, particularly a lid with a heat-insulating lid to provide a container with enhanced heat insulation.

The lid preferably has a shape that allows the upper and lower containers to be fitted and fixed when the foldable containers of the present invention are stacked up and down. For example, the lid has a downwardly convex portion so as to fit inside the container, and has an upwardly convex portion shaped to fit into the shape of the bottom of the upper container.

In accordance with the structure of the present invention, the collapsible container of the present invention comprises four side plates, A, B,
It has C and D. Then, the hinge connection portion is simply bent 90 degrees as shown in the figure (at this time, the foldable container of the present invention is assembled so that the articles to be conveyed are stored therein. is there)
And can be returned to zero degrees, ie, flat (the collapsible container of the present invention is now folded and returned), ie,
The folding container of the present invention can be bent 90 degrees (at this time, the foldable container of the present invention is assembled and the goods to be conveyed are stored therein), and further bent 180 degrees and folded. Sometimes, the foldable container of the present invention is in a state of being folded and returned), in which a margin is provided by the thickness of the bottom plate so that the bottom plate can be inserted therebetween, that is, the symbol E, and the arrangement is as shown in the figure. Therefore, the bottom plate E
The length is approximately the length of the side plate (for example, A, C),
The length of the bottom plate E is the length obtained by subtracting the plate thickness.
Therefore, the plate thickness and the bottom height are subtracted.

As described above, in the foldable container according to the present invention, the side plates A, B, C, D and the bottom plate E are connected at the hinge connection part, and have a folding structure. It is bent from 0 degrees to 0 degrees, and at a certain hinge connection portion, it is a structure that can be bent from 90 degrees to 180 degrees. In FIGS. 7, 8, and 9, the portion bent at a right angle is shown as loose, but actually, as shown in FIGS. Can be created exactly at right angles and can be held exactly at right angles. Then, the bottom plate E can be bent at a right angle even at the hinge connection portion sandwiching the bottom plate E, and can be bent exactly at 180 degrees, so that it can be molded with an accuracy that can be fixed. In other words, a product having a double structure with a hollow at right angles can be manufactured accurately by the blow molding method.

According to the invention, the hinge connection, which can be bent up to 90 degrees, extends from the end of the corresponding end face of the side plate at right angles to that surface and has a width of at least the thickness of the side plate. Therefore, the end faces of the side plates bent at 90 degrees are fitted in the meantime, and are accurately fixed when assembled. And the hinge connection portion that can be bent up to 180 degrees has a width plate at least as high as the thickness of the bottom plate,
It extends from the side of the end of the corresponding side plate at right angles to the surface, has a hinge at the inner end of the width plate, and is connected to the inner end of the end surface of the corresponding side plate. Yes,
When assembled, its side plates are parallel to its width plate,
When folded, its side plates are 9
Bend 0 degree, ie 18 for the corresponding side plate
It is bent to 0 degrees. In such a construction, when assembled, the foldable container is such that the end faces of the corresponding side plates engage with the right-angled recesses of the hinge connection part, are accurately fixed, and the face of the width plate of the hinge connection part And the foldable container of the present invention is folded 180 degrees when folded, so that the bottom plate is accurately inserted between the corresponding side plates, Is fixed.

Next, the foldable container of the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

[0023]

Embodiment 1 FIG. 1 is a front view showing the whole of a foldable container according to the present invention in an unfolded state. That is, the left end of the surface A and the margin 13 at the end of the hinge connection portion 6 at the right end of the surface D are combined and assembled. FIG. 2 is a sectional view of FIG. That is, five face plates forming a foldable container; A, B, C, D,
As shown in FIG. 1, E (becoming a bottom plate) is manufactured in a developed form. That is, the foldable container of the present invention is configured as a rectangular parallelepiped having six surfaces, A, B, C, D, and E, and a lid (not shown). The upper surface, that is, five face plates A, B, C, D, and E excluding the lid, is formed, and is bent at a substantially ridge end of the face plate. When assembled, form the side 4
The two side plates A, B, C, D are joined at their ends by four hinged parts.

There are two types of hinge connection parts.
A width plate 5 having hinge portions 3 and 3 'on both sides thereof (between A and B and between C and D as shown) and a hinge plate 4 at one end; (I.e., as shown, between B and C and between D and A: formed by combining A and D as described above). Further, a bottom plate E is connected to the vicinity of the bottom end of one of the four side plates (A in the figure) by a hinge connection portion that can be bent from 90 degrees to 180 degrees.
This hinge connection portion is formed by bonding the margin 12 by bending as shown in FIG. 3 (see FIG. 3). Further, the other side plates B, C, D of the four side plates
When assembled near at least one bottom end of
A bottom plate stopper 7 for engaging the end of the bottom plate D as shown in FIG. 3 is provided.

Further, as shown in FIG. 2, the foldable container of the present invention has a double structure, and a hollow portion in a topsheet 1 made of a resin film is filled with a porous heat-insulating resin 2. It was made. That is, FIG. 2 shows a cross section of a molded body to be formed when the foldable container of the present invention is manufactured by a blow molding method, and thus also suggests a shape of a mold therefor. That is, by blow molding, the container of the present invention must be formed into a stepped structure as shown in the figure. And, between the side plates A and B,
The width plate 5 is joined through the hinge portion 3 ′, and then the side plate B is formed through the hinge portion 3. When assembling,
When the width plate 5 is rotated 90 degrees at the hinge portion 3 ′ and stands on the side plate A, at the same time, the side plate B is rotated around the hinge portion 3 by 90 degrees and collides with the width plate 5. The side plate B stands vertically on the side plate A. Further, a hinge connection portion 6 having an interval corresponding to the thickness of the side plate is provided between the side plate B and the side plate C, and the hinge portion 4 is located at the outer end of the end surface of the side plate B as shown in FIG. When the side plate C is rotated by 90 degrees, the concave right-angled portion formed by the hinge connection portion 6 and the end surface of the side plate C is fitted to the right angle of the convex inside the end surface of the side plate B (upper side in the figure). The side plate C is fixed at a right angle. And between the side plate C and the side plate D, the width plate 5
And the hinges 3 ′ and 3 are provided at diagonal ends, so that the side plate D is perpendicular (vertical) to the side plate C in the same manner as between the side plates A and B.
Stand on. And, there is a margin to be joined to the outer side surface of the end of the side plate A, and a margin to be joined to the outer side surface of the end of the side plate A. Similarly, the hinged part 6 is formed and, when assembled, assembles four side plates at right angles to each other.
That is, as shown in the figure, the side plates A and D are joined by a wide hinge connection portion 6, and as a whole, the side plates A, B, C,
D can stand.

In order to join the margin 13 to the side surface of the end of the side plate A, it is possible to use a joining technique such as hot-melt joining or ultrasonic joining. And formation of a bottom board (floor board) E can be performed similarly. That is, as can be seen from FIG. 3, the margin 12 has a width corresponding to the height at which the bottom plate E is fixed to the side plate. And FIG.
As shown in the figure, it is folded back on the bottom side surface 14 of the side plate A,
The upper end 1 is bonded by a bonding technique such as ultrasonic bonding.
5 is a hinge part. That is, the foldable container of the present invention can be manufactured only by blow molding, filling of the porous resin, and the bonding technique.

Then, when assembled, the bottom plate E engaged with the bottom plate stopper 7 can be folded 90 degrees by the hinge portion 15 as shown by the dotted line in FIG. 3 and can be folded. At the same time, as described above, the two hinge connection portions (6, 4) facing each other form a hinge connection portion in which the connection face plates can be bent from 90 degrees (assembled state) to 0 degrees (folded state). The other two facing hinge connections (5, 3, 3 '), where the face plates of the connection
It is bendable from 90 degrees (assembled state) to 180 degrees (folded state), and has a width plate at the hinge connection portion, so that there is a margin corresponding to the height of the width plate, and the bottom plate just between them. Yes, it will be folded. That is, they are assembled as shown in FIG. 4 and then folded as shown in FIG.

FIG. 4 is a top plan view of the assembled state of the foldable container of the present invention. The four side plates A, B, C and D are vertically erected, and the bottom plate E is
Are fixedly engaged with the bottom plate stopper 7. As shown in the cross-sectional view of FIG. 3, the expanded and blow-molded parts of FIGS.
Hinge connection portions 6 with hinged portions 4 and 5 at the facing corners and with hinge portions 4 at the corners
Are at the corners facing each other. And, in the side plates B and D,
A handle recess 8 is provided. Then, when the bottom plate E is raised and folded by the hinge portion 15 to match the side plate A, the side plates A, B, C, and D are folded inward by the hinge portions 3 and 3 and simultaneously folded outward by the hinge portion 4. , The container is folded to the state shown in FIG.

That is, the side view of FIG. 5 is a view of the folded state as viewed from the side. This is folded at the two types of hinge connection portions as shown in the figure, so that the side plates A, B, C, D, and the bottom plate E are folded in parallel as a whole to be compact. The bottom plate E is folded 180 degrees and
Since there are two width plates 5, they can be inserted between the side plates and can be folded small. That is, when the foldable container of the present invention is returned, it can be transported with a reduced space, as shown in FIG.

That is, the key point of the present invention is that the folding container shown in FIG. 4 can be folded as shown in FIG. As shown in FIG. 2, when each member is manufactured at a right angle, when assembled and folded,
The precise shape can be maintained, which is convenient for use. The collapsible container according to the invention is advantageously used, for example, for transporting frozen products.

By utilizing the combination of the hinge connection portions 6, 6 and 5, 5, the foldable container of the present invention becomes easy to use and can be used in an integrated manner. 1 and 2, the side plate A of the developed product
In the foldable container made by connecting the ends of D, when it is folded, it is folded on the side as shown in FIG. 5, so that it can be integrated and returned and transported.

FIG. 3 is a sectional view of the foldable container assembled as shown in FIG. 4 as viewed from the side. The other side plates A and C are provided on the side plates B and D facing the handle concave portion 8, and the other side plates A and C face each other, and the bottom plate E extends so as to be bent at a right angle from near the bottom of the face plate C. That is, the bottom plate E is provided with a hinge portion 14 at a point slightly raised from the bottom of the face plate A, and the hinge portion 14 can be bent by 90 degrees and is engaged with the stopper 7 provided near the bottom of the face plate C, Will be retained.

FIG. 6 is a perspective view showing an assembled state of the foldable container of the present invention. That is, face plates (side plates) A, B, each of which has a double structure hollow filled with a heat insulating resin,
C and D are erected at 90 degrees to each other, at the bottom of which a bottom plate E extends from the face plate A as described above and has a flange-like bottom plate stopper 7 near the bottom of the face plates B, C and D. And can maintain the strength and maintain the rectangular parallelepiped shape. And the goods to be transported can be stored therein. When the foldable container having the rectangular parallelepiped and heat insulating properties shown in FIG. 6 is further covered with a heat-insulating lid having a cross-section (for example, a rectangular parallelepiped having a concave portion that is perfect for the inside diameter) that fits without any gap. ,
Obtain a foldable container with excellent heat insulation. Furthermore,
If the lid has a shape on the top surface that fits the bottom of the upper container when the foldable containers are stacked, the lid can stably be stacked and is convenient.

A method for manufacturing a foldable container according to the present invention will be described. The foldable container of the present invention is manufactured by a blow molding method. That is, the resin film to be blow-molded enters a mold having a lower outer shape in the cross section shown in FIG. 2 and the like, and blow molding is started. Then, the blow-molded thin film is extended to the mold. enter. Then, the upper mold is engaged so that the outer shape of the cross section shown in FIG.
Molded. The blow molding method can produce a double-structured foldable container with the desired accuracy in the present invention. As described with reference to FIGS. As described above, a significant cost reduction can be obtained.

[0035]

Embodiment 2 In this embodiment, the foldable container of the present invention is formed so that the ends of each member are looser than those in Embodiment 1 and each is curved. For this reason, the shape does not have an exact angle, but when the bottom plate is fitted, a substantially rectangular parallelepiped folding container is obtained. That is, as shown in FIGS. 7, 8, and 9, the four side plates A, B, C, and D are integrally formed through the hinge connection portion 5 and the wide hinge connection portion 6, and the face plate E serving as the bottom plate is further formed. , Through the hinge connection part 12 under the side plate C. The hinge connection portion 12 is formed at a level slightly higher than the lower ends of the other side plates A, B, and D. That is, in actual use, the bottom plate E is in a state of being perpendicular to this paper surface, and the other ends are fitted by bottom plate stoppers 7 provided near the lower ends of A, B, and D. Fixed. As shown in FIG. 9, the bottom plate stopper 7 is provided at a position slightly higher than the end of the side plate. Further, a concave portion is formed at the bottom of the container, and when the foldable container of the present invention is stacked in the concave portion, the lower lid is fitted, so that the upper and lower containers can be stabilized.

As shown in FIG. 8, similarly to the first embodiment, a surface portion 1 made of a resin film and having a double structure is formed.
Are filled with a heat insulating resin 2 in a hollow portion.
Between each face plate A and B there is a hinge connection part 5 that can be bent up to 90 degrees (ie from 90 degrees to 0 degrees). Then, between the face plates B and C, there is a hinge connection portion 6 (that is, it can be bent from 90 degrees to 180 degrees) having a width that has room for the thickness of the bottom plate. Then, between the face plates C and D, the same hinge connection portion 5 as before is provided. FIG. 8 is a view of the folding container of the present invention in the process of being produced, that is, a view in which the folding container is developed, and the left and right end portions of the drawing are joined by hot-melt joining or ultrasonic joining or the like. The technique forms a hinged connection 6 at the joint where the joint has a margin with a width equal to the thickness of the bottom plate, which makes it possible to produce a foldable container.

The side view of FIG. 9 is a view of the folded state as viewed from the side. This connects the end 3 of the side plate A and the end 4 of the side plate D. Then, as shown, the side plate A and the side plate D are joined by the wide hinge connection portion 6,
As a whole, it can be made to stand on the side plates A, B, C and D. The bottom plate E can then be folded 180 degrees with respect to the side plates and inserted between them by means of the two wide hinged parts 6 and can be folded small.

That is, the foldable container of the present invention is
In the case of return, it can be folded as shown in FIG. 9 to reduce the space and transport. That is, in the foldable container of the present invention, two hinge connection portions are provided.
There are several types of hinge connection parts 5 that can be bent up to 90 degrees (i.e., can be bent from 90 degrees to 0 degree), and the other can be bent up to 180 degrees (i.e., 90 degrees). From 180 degrees to 180 degrees), meanwhile, the other face plate, namely the bottom plate,
Between the two side plates folded at 180 degrees is a hinged connection 12 with a width that can be clamped. And
As shown in FIG. 9, the two facing hinged portions are of the same type so that they can be folded.

That is, as shown in FIG. 9, the key point of the present invention is a structure that can be folded. In the figure, the ends of each face plate are all provided with a radius.
This is only an indication that the present invention can be practiced, for example, the hinge connection between each faceplate is folded 90 degrees, assembled into a rectangular parallelepiped, and only the hinge connection 6 is folded 180 degrees. , Hinge connection part 5
Just turning it to 0 degrees,

Therefore, the folding container of the present invention can provide a low-cost, heat-insulating folding container which has been almost impossible in the past. Further, since the molding is performed by the blow molding method, the capital investment can be reduced.

[0041]

The foldable container of the present invention has the following technical effects by the configuration shown in the drawing.
That is, first, it is possible to manufacture a low-cost, highly heat-insulating foldable container. Second, a foldable container that is convenient to use, easy to handle, and of high practical value was provided.

[Brief description of the drawings]

FIG. 1 is an exploded view of a type of a foldable container for explaining the structure and manufacturing method of an example of the foldable container of the present invention.

FIG. 2 is a cross-sectional view of the foldable container of FIG. 1 as viewed from a side.

FIG. 3 is a sectional view of the foldable container of FIG. 1 assembled.

4 is a plan view of the assembled foldable container of FIG. 1 as viewed from above.

FIG. 5 is a side view of the foldable container of FIG. 1 folded.

FIG. 6 is a perspective view of the assembled foldable container of FIG. 1;

FIG. 7 is an exploded view of the foldable container when the foldable container is manufactured according to another embodiment of the present invention.

8 is a side sectional view of the foldable container of the present invention of FIG. 7;

FIG. 9 is a side view showing a state where the foldable container of FIG. 7 is assembled and further folded.

[Explanation of symbols]

A, B, C, D Side plate of hexahedron E Bottom plate of hexahedron 1 Surface layer of each panel (double structure by blow molding) 2 Filled heat insulating resin of each panel 3 Hinge part (90 degrees to 18 degrees)
4 hinge part (90 degree to 0 degree bending hinge connection part) 5 width plate 6 hinge connection part 7 long protrusion (bottom plate stopper) 8 handle concave part 12 connection margin of bottom plate (or bottom plate) (A part to be a hinge part) 13 Attaching part of hinge connection part 15 Hinge part of bottom plate

Claims (3)

(57) [Claims] 1. A collapsible container which is composed of six rectangular parallelepipeds, is composed of five face plates excluding an upper surface thereof, and is bent at a substantially ridge end of the face plate. At this time, the four side plates constituting the side surface are hinged at the ends and are continuous by four hinge connection portions, and the two facing hinge connection portions have a connection between the face plates of 90 ° to 0 °. Forming a foldable hinge connection, the other facing 2
The two hinged connections, where the faceplates of the connection are 90
From 180 degrees to 180 degrees, and the width of the hinge connection portion has a margin corresponding to the thickness of the bottom plate. Near the bottom end of one of the four side plates To
The bottom plate is connected at a hinge connection portion that can be bent from 90 degrees to 180 degrees, and further, when assembled near at least one bottom end of another of the four side plates, when the bottom plate is assembled. Characterized in that the container has an elongated projection for engaging an end of the container. 2. The five face plates, that is, the four side plates constituting side surfaces when assembled with the bottom plate, have a hollow shape by blow molding as a developed form connected through the hinge connection part. As a heavy structure, it is integrally molded,
The desired porous resin is filled into the hollow interior of the formed double structure, and is formed into a foldable container having heat insulating properties. Therefore, both ends of the integrally molded four side plates are provided. The foldable container according to claim 1, wherein the end portions of the two side plates are connected by a hinge connection portion. 3. The hinge connection portion that can be bent from 90 degrees to 0 degrees has a width of at least the thickness of the side plate,
The corresponding side plate extends from the outer end of the end surface of the corresponding side plate to the outer end of the end surface of the corresponding side plate perpendicularly to the end surface. When the corresponding side plate is bent at 90 degrees and assembled, the corresponding The right angle of the end face of the side plate to be engaged is engaged with the right angle between the end face of the other corresponding side plate and the hinge connection part, and the hinge connection part that can be bent from 90 degrees to 180 degrees is A width plate having a height substantially equal to the thickness of the bottom plate, and a long hinge portion provided at an inner end of the width plate. At right angles to the inner surface of the side plate, the height corresponding to the thickness of the bottom plate, extending,
The long hinges allow the corresponding side plates to extend from 90 degrees to 18 degrees.
It is foldable to 0 degrees, and when assembled, the corresponding end faces of the side plates and the end faces of the width plate are in a collision surface engagement, and when the foldable container is folded, it is 18 times.
3. The foldable container according to claim 1, wherein the container is bent at 0 degrees, and the long hinge portion is bent at a right angle.