JPH0939956A - Folding insulated container for carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container which is simple in assembly and folding, capable of being folded almost in one simple operation, firm to collapse the form after being assembled in a box, tough and excellent in the heat insulation effect, compact in a flat and rectangular shape when it is empty, and not bulky even when a large number of containers are stored or carried. SOLUTION: Four side wall panels 10, 11 consisting of blow formed products of double wall structure are successively connected by flexible films 14, 15 on the side part to form a prismatic cylinder. One side of a bottom panel 30 is connected to a lower edge on the inner side of one of the side wall panels 10 by a flexible film 33, while a receiving rib 17 is formed on the inner side in the vicinity of the bottom edge of the side wall panels 10, 11. Folded side wall parts are provided in two sets of side wall panels 10. A space C in which the bottom panel 30 can be held is formed between the side wall panels when they are flat. When folded, a flat and compact rectangle is formed to simplify the assembly and folding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container used in a product distribution process, and more particularly to a foldable container that reduces an empty container volume.

[0002]

2. Description of the Related Art In most of the conventionally known foldable containers of this type, sidewall panels are connected to the four sides of the bottom panel by flexible membranes.
FIG. 1 of Japanese Patent No. 3 and FIG. 1 of Japanese Utility Model Laid-Open No. 6-87226.
Are known respectively. Since these publicly known ones have the above-mentioned structure, when they are expanded and flattened, they have a large area, and when they are flattened, they do not have a rectangular shape. They have to be combined or separated and are cumbersome to handle.

[0003]

The present invention is easy to assemble and flatten, and can be flattened when empty, and when flattened, the overall contour shape is rectangular, and a large number of containers of this type can be stored. It is to provide the market with containers that have excellent storage efficiency even when they are stored or transported. Further, the present invention is to provide the market with a container which has a heat insulating structure as a whole and is suitable for transportation or storage of products that need to be transported at frozen or low temperature.

[0004]

In order to achieve the above object, the present invention connects a side wall panel and a bottom panel made of a blow-molded product having a double wall structure by hinges connected by a flexible membrane at a ridge. In the foldable container, the side wall panels are sequentially connected at a ridge line portion by a flexible film to form a rectangular tube shape, and one of the side wall panels has an inner side near a bottom edge thereof. The one side of the bottom plate panel is hingedly connected by a flexible film,
When the bottom panel is placed upright along with the side wall panel,
This bottom panel is equal to or half the height of the side wall panel
The receiving ribs for supporting the bottom panel along the bottom edge are respectively provided inside at least the bottom edges of the other three side wall panels to which the bottom panel is not connected. Of the square tubular side wall panel, which is formed, the standing ridge portion located on the diagonal line of the square tubular side wall panel on one side of each of the facing side wall panels,
A bent side wall that is bent inward is formed,
The inwardly projecting dimension of the bent side wall portion is equivalent to the thickness of the bottom panel, and the side wall panels adjacent to the longitudinal vertical edges of the bent side wall portion are hingedly connected by a flexible film. It is characterized by comprising the combination of the components of.

Further, in order to achieve the above object, the flexible membrane of the foldable transport heat insulating container is formed integrally with at least one of adjacent panels at the time of blow molding. It is preferable that

Further, in order to achieve the above-mentioned object, the connection between the longitudinal vertical edge of the bent side wall portion of the foldable heat insulating container for transportation and the vertical edge of the side wall panel connected to the bent side wall portion is such that inner ridge edges are both polar. They are closely connected and hinged by a flexible film, and the connection between the side wall panels of other parts is
It is preferable that the tip portion of the side wall flange which is continuous with the outer edge of one of the side wall panels is hingedly connected to the outer edge of the adjacent side wall panel with a flexible film. .

In order to achieve the above object, it is preferable that the hollow portion of the double wall structure of each of the panels of the folding type heat insulating container is filled with a foamed resin. .

In order to achieve the above object, the receiving ribs of the foldable heat insulating container for transportation are provided on all side wall panels, and the size of the bottom panel is such that when the container is assembled in a box shape. The end faces of the four sides of the bottom panel are in contact with or extremely close to the inner faces of the receiving ribs, and bottom flanges that engage with the upper faces of the receiving ribs are formed along the four sides of the bottom panel. It is preferable that

Further, in order to achieve the above-mentioned object, of the side wall panels formed in the cylindrical shape of the folding type heat insulating container for transportation, the side wall panels on two opposite sides correspond to the panel thickness. It is preferable that the hand-holding depression is formed at the time of blow molding, and that an undercut sufficient for finger engagement is formed inside the upper edge of the hand-holding depression.

Further, in order to achieve the above-mentioned object, in the state where the side wall panels of the folding type heat insulating container for transportation are formed into a box shape, a lid flange that fits inside the side wall panels and engages with the upper edge is provided. In some cases, it is characterized in that a lid panel provided in the periphery is detachably equipped.

In order to achieve the above object, the lid panel of the foldable transport heat insulating container also has a double wall structure formed by blow molding, and the hollow portion thereof is filled with foamed resin. On the lower surface of the lid flange, there is a projection that fits around the opening of the container almost all around, and when another container is stacked on the lid panel, it fits around the bottom of the upper container almost all around. It is preferable that the protrusion is formed on the upper surface of the lid panel.

In order to achieve the above object, a regenerator package pack containing a regenerator, which is a shallow recess reaching almost to the periphery, is housed inside the lid panel of the foldable transport insulating container. A storage chamber is formed, and the storage chamber is equipped with a mesh or lattice-shaped lid having a ventilation characteristic for supporting the pack, and one locking means of a locking band. In some cases.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 It is a representative embodiment including the inventions described in FIGS. 1 to 7 and including all claims, and the adjacent side wall panels 10 and 11 are integrally formed at the time of blow molding. The side wall panels 10 and 11 are formed into a heavy wall structure.
Among them, one end of the longer side wall panel 10 is bent and formed in an L shape, and the overhanging dimension t2 of the bent side wall portion 12 formed by bending is a bottom panel 30 described later.
Is equal to the thickness equivalent dimension T2 of the above, or is slightly larger than the thickness of the bottom panel 30.

Between the longer L-shaped side wall panel 10 and the shorter side wall panel 11, the longer side wall panel 10 is provided.
The side wall flange 13 integrally formed from the outer edge of the side wall flange 13 is formed, and the leading edge of the side wall flange 13 and the outer edge of the shorter side wall panel 11 form a hinge portion by the flexible film 14. Are connected. The side wall flange 13 described above
Width t of the side wall panel 11 formed by blow molding
The thickness T is equivalent to The flexible film 14 is formed by reducing the thickness of the flange, and the two side wall panels are hinged at the flexible film 14 portion (see FIG. 4).

On the inner edge of one end of the shorter side wall panel 11, a second flexible film 15 having a short width and a connecting plate portion 16 connected to the second flexible film 15 are formed. That is, the flexible film 15 forms a hinge portion.

The aforementioned flexible membranes 14 and 15 have a blow-molded portion made of polyethylene, and have 10 to 2 inside.
A container for packaging 0 kg has a thickness of about 0.5 to 1.2 mm and a width of about 3 mm.
And The thickness of the side wall plunge 13 and the plate-shaped portion 16 was set to about 1.5 to 2 mm. The thickness T1 of the side wall panels 10 and 11 was set to about 10 mm. If the box is small and the object to be packaged is light in weight, these values will be smaller than those in the above example.Conversely, if the container volume is large, and in the case of loading heavy objects, it will be a large value. Therefore, these numbers have no limited meaning.

Two sets of the above-mentioned series of side wall panels 10 and 11 are prepared, they are laid on each other, and the connecting plate 15 is welded or adhered to the inside of the other side wall of the bent side wall 12 of the other set to form a corner. It has a tubular shape (see FIG. 5). This connecting plate 1
As means for connecting 5 to the bent side wall portion 12,
Unlike the above-mentioned example, in the case of a container for storing heavy objects, they may be joined by tacks or bolts and nuts.

Side wall panels 10 and 11 forming the four sides
In the vicinity of the bottom edge, receiving ribs 17 for receiving a bottom panel 30 which will be described later are formed integrally with the respective panels in the vicinity of the bottom edge, and the protruding dimension t1 is 1 / th of the thickness T2 of the bottom panel. 2, that is, a half of the overhanging dimension t2 of the bent side wall portion 17 (see FIG. 6).
A foamed resin 19 is integrally formed in the hollow portion of the double wall structure of the side wall panels 10 and 11 and the bottom panel 30 during blow molding.

Reference numeral 30 denotes a bottom panel having a rectangular shape,
When the side wall panels 10 and 11 are formed into a rectangular tube shape, the end faces 31 of the four sides are sized to come into contact with the leading end faces of the receiving ribs 17, and the bottoms extending horizontally to the upper ridges around them. A flange 32 is formed, and this bottom flange 32 is engaged with the upper surface of each receiving rib 17.

One side of the bottom flange is the third flexible film 3
The bottom connecting plate portion 34 is formed integrally with the bottom panel 30 via the hinge portion 3 and the bottom connecting plate portion 34 conforms to the upper surface of one receiving rib 17 of the side wall panel 10. It is welded or adhered to the inner surface of the side wall panel 10 (see FIG. 6). Of course, in a container that stores heavy objects, they may be connected by tacks or bolts and nuts.

The structure of the bottom panel 30 is also the side wall panel 1.
Like Nos. 0 and 11, it has a double wall structure formed by blow molding, and the hollow portions are filled with the foamed resin 35 made of synthetic resin together with the side wall panels 10 and 11. In the embodiment, the thickness of the connecting plate portion 34 of the bottom panel 30 is about 2 mm.
There is.

When the above-mentioned bottom panel 30 is erected parallel to the side wall panel 10 with the flexible film 33 portion as the center of rotation, the bottom flange 32 at the free end of the bottom panel 30 is outward from the upper edge of the side wall panel 10. The dimension is such that it does not protrude, and it depends on the shape of the container, but it is usually dimensioned to reach at least ½ of the height of the side wall panel to the height of the side panel.

Reference numeral 40 denotes a lid panel, which is also a blow molded product and has a double wall structure. Thickness T3 is about 28 mm
The plane dimension of the side panel 1 is the rectangular tube shape.
0 and 11 are the same as the upper end contour dimension, and a lid inner surface rib 41, which is a kind of a flat rectangular protrusion that fits with the side wall panels 10 and 11 when formed into a rectangular tube shape on the lower surface, is made to protrude. In the peripheral portion of the upper surface of the lid panel 40, a step 42 is formed, and a protrusion 45 having a raised central portion is formed.
The protruding portion 45 has a size and a height which are fitted around the entire circumference of the bottom portion of the upper container when the containers are stacked in multiple stages. This lid panel 40
The hollow portion of the double wall is filled with the foamed resin 43 and integrated (see FIG. 7).

On the outer surface 21 of the short side wall panel 11 described above, a surface layer 18 having a double wall structure is recessed so that a handle recess 2 can be formed.
Two of them are simultaneously molded at the time of blow molding. The inside of the upper edge 23 of the handhold depression 22 is largely undercut, and the upper edge 23 projects downward.

That is, in the first embodiment including the invention according to claim 1, when assembled in a box shape, the four side wall panels 10, 1 connected by the flexible films 14, 15 are formed.
1 is a substantially rectangular tube shape, and the bottom panel 30 is a side wall panel 1
When leveled at right angles to 0 and 11, at least three perimeters of the bottom panel 30 are supported by the receiving ribs of the side wall panels 10 and 11, and the square shape of the bottom panel 30 holds the entire cubic shape. Also all sidewall panels 1
Since 0, 11 and the bottom panel 30 have a double wall structure and a hollow portion, they have a heat insulating function and enhance their rigidity.

In this state, frozen or refrigerated products are filled in a container and transported by a truck or the like by using an appropriate lid, or they are temporarily stored in a multi-stage stack or transported. When the product is empty, the bottom panel 30 is bent upward from the flexible membrane portion on one side thereof, and the bottom panel 30 is put inside the side wall panels 10 and 11 to which the bottom panel is connected. 12
The adjacent side wall panels 10 and 11 which are continuous with each other are folded inward so as to be parallel, and the two side wall panels 10 and 11 which are continuous with the flexible film 14 of the other part are extended in the same plane to form a whole. Flatten (see Figure 2). In this way, the thickness of the folded container is two side wall panels.
The total thickness of 0 and 11 and the bottom panel is a little greater than the thickness, and the size of the plane is the size of two adjacent side wall panels 10 and 11, and the bottom panel 30 is the continuous side wall panel 1 of these two.
It falls within the range of the contour shapes of 0 and 11.

In the first embodiment including the invention according to claim 2, in addition to the function of the invention according to claim 1, the flexible membranes 14 and 15 are provided on at least one of adjacent panels. Since it is integrally molded with the panel during blow molding, it is firmly connected.

In the embodiment including the invention according to claim 3, in addition to the function of the invention according to claim 1 or 2, the longitudinal vertical edge of the bent side wall portion 12 and the side wall panel 11 connected to the longitudinal vertical edge. Since the inner ridge edges of the connecting portions with the vertical edges of the both are very close to each other and are connected by the flexible film 15,
When the four side wall panels 10 and 11 are formed into a rectangular tube shape, the bent side wall portion 12 and the side wall panel 11 adjacent thereto are in a butt state, and the heat insulating effect is maintained also in this portion. Further, when the side wall panel groups 10 and 11 are flatly folded, a space having a thickness capable of accommodating the bottom panel 30 is formed between them.

The other side wall panels 10 and 11 are connected to each other by the tip end of the side wall flange 13 having a width corresponding to the thickness of the side wall panel 10 which is continuous with the outer edge of one side wall panel of these side wall panels. Since the flexible film 14 is connected to the outer edge of the side wall panel 11 of FIG.
When 1 is made into a rectangular tube shape, it bends at a right angle in the flexible film 14 portion, the end surface of one side wall panel 10 contacts the inner surface of the side wall flange 13, and the inner wall surface of that portion further adjoins the adjacent side wall panel. The corner portion of the container is formed in contact with the end face of 10, and also in this portion, a sufficient heat insulating effect is maintained.

In the first embodiment including the invention according to the fourth aspect, the first, second and third aspects are provided.
Alternatively, in addition to the function of the invention described in claim 4, each panel 10, 1
Since each of the panels 1 and 30 has a double wall structure and the hollow resin is filled in with the foamed resin 19, each panel has high rigidity and is hardly deformed, and has a heat insulating function.

In the first embodiment including the invention according to claim 5, in addition to the function of the invention according to claim 1, claim 2 or claim 3, the receiving ribs 17 are all side wall panels. 10 and 11, the size of the bottom panel 30 is configured as described above. Therefore, when the container is assembled in a box shape, the four end faces of the bottom panel 30 and the receiving ribs are formed. Since the inner surface 17 is in contact with the bottom panel 30, the joint between the bottom panel 30 and the side wall panels 10 and 11 has a double wall shape as a whole, and a sufficient heat insulating effect is maintained in this portion as well. In addition, the bottom flange 32 of the four sides is provided with the receiving ribs 1 of the side wall panels 10 and 11.
Since they are respectively supported by 7, the load of the packaged object in the container is not directly applied to the flexible film 33 portion connected to the bottom panel 30.

In the first embodiment including the invention according to claim 6, in addition to the function of the invention according to claim 1, claim 2, claim 3, claim 4 or claim 5, the shape described above is provided. Since the container recess 22 is provided, the undercut U is formed when the packaged object is stored in this container and then transported, so that the fingers of the carrier can be sufficiently engaged with the container recess 22. Even if a heavy package is stored, the finger of the carrier cannot be removed from the depression 22.

In the first embodiment including the invention described in claim 7, claim 1, claim 2, claim 3,
In addition to the function of the invention described in claim 4, claim 5, or claim 6, since the lid panel 40 having the lid flange 42 on the periphery is provided, the six surfaces serve as a container.

In the first embodiment including the invention described in claim 8, in addition to the function of the invention described in claim 7, since the lid panel 40 also has a double wall structure, this part also has a heat insulating function. Make up. Further, when this lid panel 40 is used, when the containers are stacked in multiple layers, the inner ribs 41, which are protrusions on the lower surface of the lid panel 40, fit into the opening of the container substantially all around, and the upper surface of the lid panel 40 projects. The portion 45 fits around the bottom of the upper container over substantially the entire circumference, and the upper and lower containers and the lid panel independently prevent the lateral movement and prevent the collapse of the load due to skidding.

In the first embodiment including the invention according to claim 9, in addition to the function of the invention according to claim 7 or claim 8, the cold storage agent package 46 containing the cold storage agent can be stored. Since the storage chamber 47 is inside the lid panel 40,
When the cooled or frozen package 46 is placed in the storage chamber 47 and the inner lid 48 is closed, or the package 46 is locked with a band, the package 46 is supported inside the lid panel 40. The cooled or frozen cold air around the package 46 can be stored or transported while keeping the packaged object at a lower temperature by passing through the air-permeable inner lid or directly into the container.

Embodiment 2 As shown in FIGS. 8 and 9, claims 1 and 2 are provided.
It is another embodiment including the described invention. The same components as those in the first embodiment are designated by the same reference numerals and have the same functions. The difference is that all the flexible membranes 14 and 15 of the side wall panels 10 and 11 have a narrow width, and they are all connected at the inner edge of each panel. Therefore, when the container is formed into a box shape, the corners without the bent side wall portions 12 are in a state in which the ridge lines are missing, and the heat insulating action and the cushioning action of this portion are inferior to those of the first embodiment. Other functions are similar to those of the first embodiment.

In each of the above-mentioned embodiments, the surface layers 18, 36 and 44 formed on the double walls of the side wall panels 10, 11, the bottom panel 30 and the lid panel 40 are generally referred to as hard polyethylene, polypropylene or the like. Molded resin or a mixture thereof, and the foamed resins 19, 35 and 43 inside are foamed materials of polyurethane and polystyrene. The foamed resins 19, 35 and 43 are preferably those having closed cells. Of course, the materials of these resins are merely examples and are not meant to be limiting, and even if they are replaced with other resins as long as they have sufficient mechanical strength, they are included in the present invention. When the foamed resin is polyurethane, a foamable two-component urethane is blow-molded and then injected into the hollow portion of the double wall of each panel for foaming to obtain a foamed resin made of hard urethane foam. In the case of polystyrene, expandable beads are injected into the double-walled hollow portion of the parison during blow molding and foam-molded during blow molding to form a foamed resin.

In addition, expandable beads made of the same material as the surface layers 18, 36 and 44 of each panel are used, and after the blow molding of the surface layers 18, 36 and 44, the parison is still blown from the blow molding die. Before releasing
Blowing expandable beads made of a thermoplastic resin of the same type as the surface layers 18, 36 and 44 into the parison and further blowing high temperature steam to foam the expandable beads in the parison to foam this space. Resins 19, 35 and 43
And the temperature of the mold and the molded product are lowered to a temperature required for post-mold release, and then the product is obtained by releasing from the blow mold.

In the above embodiment, the bottom panel 30 has the bottom flange 32 on the periphery thereof. However, the bottom flange 22 is not provided at all and the double wall structure of the bottom panel 30 is provided. The structure in which the rib 17 is supported around the periphery of the portion is also an embodiment of the invention of all other claims except the invention of claim 4 (see FIG. 10).

Further, in each of the embodiments, a portion surrounded by the inner rib 41 of the lid on the inner surface of the lid panel 40 is defined as a storage chamber 47 for storing the cold storage agent package 46 in which the cold storage agent is packaged.
A breathable back lid 48 is detachably fitted into the opening of the storage chamber 47, and the back lid 4 is attached by turning claws 49 attached to the inner surfaces of the lid inner surface ribs 41 one by one.
8 may be able to be locked to the inner surface of the lid 40 (see FIG. 8). Instead of the back cover 48, the cold storage agent package 46 is locked in the storage chamber 47 on the inner surface of the lid 40 by using a locking band (not shown) which is locked in a part of the storage chamber 47. You may.

[0041]

【Example】

Embodiment 1 This is an embodiment including the inventions of claim 1, claim 2, claim 3, claim 5, claim 6 and claim 8, and the size of the container is just 20 beer bottles standing upright. The size of the side wall panels 10 and 11 is 10
mm, and the thickness of the lid panel 40 is 27.5 mm.
The design thickness of each parison forming the hollow body was 1.5 mm, and the material was polyethylene.

On the outer surfaces of the pair of side wall panels 11 facing each other, a surface layer 18 having a double wall structure is recessed to form a hand-holding recess 22. The inside of the upper edge of the recess is largely undercut U. Yes, usually about 10mm undercut U
Are formed during blow molding. That is, the upper edge of the hand-holding recess projects downward by 10 mm. A bottom flange 32 is supported around the bottom panel 30 by the receiving ribs 17 of the side wall panels 10 and 11. The lid panel 40 also has a double wall structure, which is the structure shown in the first embodiment, and the storage chamber 47 is not formed. Height when the container is assembled is 300mm, bottom panel 3
The width of 0 is 270 mm including the bottom flange 32, and when the bottom panel 30 is erected, its free end is substantially flush with the upper edge of the side wall panel 10.

Embodiment 2 This is an embodiment including the inventions described in all claims. In this embodiment, the dimensions are substantially the same as those of the first embodiment, except that the depth of the portion surrounded by the inner rib 41 of the lid panel 40 is greatly increased by 25 mm, and this portion stores the cool storage agent. A storage chamber 47 for storing the pack is provided with a removable breathable inner lid 48, and the breathable inner lid 48 is a punch plate shape made of an injection-molded product of polyethylene.

As a structure for locking the breathable inner lid 48,
Similar to the case where the back cover of the frame is stopped, one turning claw 49 is provided on each side of the inner rib 41 of the cover, whereby the pack and the breathable inner cover 48 are locked (FIG. 8). reference). In addition, the foamed resin 1
9, 35 and 43 are filled. This foam resin 1
9, 35 and 43 are foamed polyethylene beads after blow molding at the time of blow molding the surface layers 18, 36 and 44, and yet before releasing the parison from the blow molding die,
Blow into the parison, then blow high-temperature steam,
The expandable beads are foamed in a parison, the space is filled with a foamed resin 19, and the temperature of the mold and the molded product is lowered to a temperature required for post-mold release, and then the mold is released from the blow mold. The foamed resin filling method of this type is generally called a super-plow foaming method.

[0045]

According to the invention described in claim 1, since the four corners of the container constituted by the four side wall panels are all connected by the flexible film, the container is formed into a box shape. Even when expanded, it is not necessary to join the corners in particular,
If you simply fold the bottom panel horizontally after making it into a rectangular tube shape, it will become a box shape, and since the periphery of the bottom parnet is supported by each receiving rib, the bottom panel will not come off and this horizontal bottom The periphery of the panel is brought into contact with the inner surfaces of all the side wall panels to exert the effect of maintaining the box shape. The width dimension of the bottom panel with respect to the height of the side wall panel is such that when the container is folded, the height of the bottom panel is in the range of 1/2 to the same as that of the side wall panel. It is stable and can be stacked in multiple stages. In addition, at the connecting portion between each side wall panel and the bottom panel, the panels having the double wall structure are brought into contact with each other, and the entire structure becomes the double wall structure, and a sufficient heat insulating effect is maintained.

When folding, the bottom panel is flipped up,
It is possible to flatten the two side wall panels as a set, and in particular, the bent side wall of the aforementioned size is placed inside the end of the side wall panel that is diagonally located on the side wall of the rectangular tubular shape that is composed of each side panel. Since each part is formed, when the rectangular tubular side wall panel is flatly folded, a sufficient space for the bottom panel to be sandwiched between them is formed, and the protrusion of the receiving rib of each side wall panel is formed. Since the dimension is 1/2 the thickness of each panel of the overhanging dimension of the bent side wall of the bottom panel to 1/2 of the thickness of these panels, these can be simply butted against each other to flatten the rectangular side panel. Not hindering
It has an effect that it can be flattened to a thickness that is approximately the sum of the thickness of the two side wall panels and the thickness of the bottom panel.

When further flattened, the two side wall panels adjacent to each other are housed in a flat rectangular outline shape of the expanded size, and become extremely compact, and the cost required for collecting and storing empty containers is saved. Become.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, at least two ridge line flexible films formed by the side wall panels of the container are at least adjacent to each other. Since it is formed integrally with one panel during blow molding, the connection is strong and there is no risk of peeling at this portion.

According to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, since the side wall panels are connected to the loop in sequence as described above, the container is box-shaped. When assembled, all the connecting parts are in a state where the double walls of the respective side walls are in direct contact or extremely close to each other, and all the side wall parts are surrounded by the double wall structure part, and the heat insulating effect is excellent.

In the invention of claim 4, in addition to the effects of the inventions of claim 1, claim 2, claim 3, claim 4 and claim 5, the hollow portion of the double wall structure of each panel Since it is filled with foamed resin, it has excellent heat insulation effect, rigidity and strength of each panel, and is optimal as a container for cold storage, frozen foods and the like.

According to the invention of claim 5, in addition to the effects of the inventions of claim 1, claim 2 and claim 3,
Since the relationship between the size of the bottom panel and the peripheral wall panel is as described above, when the container is made into a box shape, all the bottom flange portions around the bottom panel are supported by the receiving ribs, and the load applied to the bottom panel is It is supported by the receiving rib at the bottom flange part, and the connecting part of the bottom panel and side wall panel does not work,
There is no risk of peeling or damage to this joint.

Furthermore, the peripheral surface of the bottom panel is in a state of abutting and abutting with the tips of the receiving ribs, and there is also a heat insulating effect in this portion. Also, since the bottom panel is supported by the relatively thin bottom flange, the effective volume inside the container can be large.

According to the invention of claim 6, in addition to the effects of the inventions of claim 1, claim 2, claim 3, claim 4, claim 5, and claim 6, the handle recess having the above-described shape is obtained. It is easier to carry and safer because it has

According to the invention of claim 7, in addition to the effects of the inventions of claim 1, claim 2, claim 3, claim 4, claim 5, claim 6 and claim 7, a lid panel Since the container is separate, the container can be covered, and the cover panel has the above-described structure. Therefore, if the cover is provided, it fits into the opening of the side wall panel and does not move excessively.

In the invention described in claim 8, in addition to the effect of the invention described in claim 7, since the lid panel has the same structure as other panels, the heat insulating and cushioning effects are exhibited in this portion. . Further, because of the above-mentioned structure, by using the lid panel, when the containers are stacked in multiple layers, the vertically overlapping containers do not move independently to the side, and the collapse of the load is prevented, and the containers are neatly arranged in the vertical direction. It can be stacked in multiple layers.

In the invention described in claim 9, in addition to the effect of the invention described in claim 7 or 8, the cold storage agent package can be used as a container because it can be attached to the inner surface of the lid panel. According to this, the container has an effect of keeping cold for a longer time, and the regenerator package is removable, so that the regenerator package can be cooled or frozen in a detached state.

Effects of Embodiment 1 In addition to the effects of all claims, the side wall panel 1
The outer surface 21 of 1 is formed with a depression 22 for easy carrying of the container, and since it does not project outward, even if a large number of containers are arranged side by side, the adjacent containers can be handled. There is no risk of the part 22 getting caught. In particular, since the upper edge 23 of the hand-held portion 22 projects downward, the hung hand does not slip and the container can be easily moved. In addition, if the lid panel of the first embodiment is used, the inner side ribs of the inner surface allow the side wall panels 10, 1 to be formed.
The rectangular tube shape of 1 is more stable. Further, when the containers are stacked in multiple stages, they are fitted to the rectangular side wall panels 10 and 11 of the upper container at the step 42 portion, and the upper and lower containers do not move laterally, so that the load during storage or transportation can be reduced. It is hard to collapse.

Particularly, in the first embodiment, since the upper edge 23 of the above-mentioned hand-holding recess 22 is projected downward by 10 mm, the object to be packaged reaches 10 to 20 kg such as a beer bottle. However, there is no risk of slipping a finger, and it can be safely transported.

Effect of Embodiment 2 In addition to the effect of the invention described in claim 4 other than the effect of the invention described in claim 4, the structure of the corner portion of the container is simplified and the storage volume of the container is reduced. In comparison, the amount of resin used to manufacture the container is small, which reduces costs.
In each of the other embodiments, each panel 10, 11, 3
0 and 40 are double-walled structures, and each hollow part has a foamed resin 19,
Since 35 and 44 are filled, the rigidity is high and there is no fear of losing the shape, and the surface layers 18, 36 and 43 are molded from hard polyethylene, polypropylene or the like. In addition, even if the surface layer is broken, since the foaming inside is closed cells, moisture does not penetrate and the heat insulating effect is not diminished. Further, in each embodiment, in the case where the surface layer and the foamed resin of each panel are the same kind of resin, when this product is regenerated, even if all are collectively melted and regenerated, the same kind of raw material is used again. Can be reused. In each example,
In addition to the effects described above, the width of the bottom panel 30 is set as described above, so that the stability when assembled is even higher.

[Brief description of drawings]

FIG. 1 is a perspective view of a container of Example 1 assembled in a box shape.

FIG. 2 is a side view showing a state in which the container of FIG. 1 is folded flat.

FIG. 3 is a partially longitudinal side view of FIG.

FIG. 4 is a partially cutaway sectional view of a portion indicated by an arrow 4 in FIG.

5 is a partially cutaway cross-sectional plan view of a portion indicated by an arrow 5 in FIG.

6 is a partially cutaway side view of a portion indicated by an arrow 6 in FIG.

FIG. 7 is a partially cutaway vertical side view of the lid panel.

FIG. 8 is a partially longitudinal side view showing a state in which the cool storage agent package is attached to the inner surface of the lid panel.

FIG. 9 is a side view of the folded state of the second embodiment.

FIG. 10 is a plan view of the box of FIG. 8 assembled.

FIG. 11 is a partially longitudinal side view showing a state in which a side wall panel and a bottom panel of another embodiment are engaged with each other.

[Explanation of symbols]

 10, 11 Side wall panel 12 Bending side wall part 14, 15, 33 Flexible film 17 Receiving rib 22 Hand recess 30 Bottom panel 19, 35, 43 Foam resin 40 Lid panel 46 Cooling agent package 47 Storage room

Claims (9)

[Claims] 1. A foldable container in which a side wall panel and a bottom panel made of a blow-molded product having a double wall structure are hingedly connected by a flexible membrane at a ridge line portion, wherein the side wall panels are sequentially formed at the ridge line portion. One side wall panel among these side wall panels is connected by a flexible film so that one side of the bottom plate panel is hingedly connected by a flexible film inside the vicinity of the bottom edge. When the bottom panel is erected along with the side wall panel, the bottom panel has a height equal to or half the height of the side wall panel, and at least the bottom panel is connected. Inside the vicinity of the bottom edge of the other three side wall panels that are not formed, receiving ribs for supporting the bottom panel along the bottom edge are respectively formed, Side wall The rising ridges located on the diagonals of the square tubular side wall panels on each side of the flannel have bent side walls that are bent inward. As the thickness of the bottom panel,
A foldable heat-insulating container for transportation, characterized in that side wall panels adjacent to the longitudinal edges of the bent side wall portions are hingedly connected by a flexible film, and the above components are combined. 2. The foldable heat-insulating container for transport according to claim 1, wherein the flexible film is integrally formed with at least one of adjacent panels at the time of blow molding. 3. A connecting portion between a longitudinal vertical edge of the bent side wall portion and a vertical edge of a side wall panel connected to the bent side wall portion is such that inner edge edges thereof are extremely close to each other and are hingedly connected by a flexible film, The other side wall panels are connected to each other by connecting the tip of the side wall flange, which is continuous with the outer edge of one of the side wall panels, to the outer edge of the adjacent side wall panel with a flexible film. The foldable transport insulating container according to claim 1 or 2, wherein the foldable transport insulating container is provided. 4. The foldable heat-insulating container for transport according to claim 1, wherein the hollow portion of the double wall structure of each panel is filled with foamed resin. . 5. The receiving ribs are provided on all side wall panels, and the size of the bottom panel is such that when the container is assembled in a box shape, the end faces of the four sides of the bottom panel contact the inner faces of the receiving ribs. 4. A bottom flange which is in contact with or very close to each other and which is engaged with the upper surface of the receiving rib along the four sides of the bottom panel is molded, respectively. Alternatively, the collapsible transport insulating container according to claim 4. 6. A handle recess corresponding to the thickness of the panel is formed on the outer side of two side wall panels facing each other among the side wall panels formed in the tubular shape at the time of blow molding. An undercut sufficient to engage a finger is formed inside the upper edge, claim 1, claim 2, claim 3, claim 4 or claim 5.
Foldable transport insulation container as described. 7. A lid panel, which is fitted inside the sidewall panels and has a lid flange on the periphery, which engages with the upper edge of the sidewall panels in a box-shaped state, is detachably mounted. The foldable transport heat insulating container according to claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6. 8. The lid panel also has a double wall structure formed by blow molding, and a foamed resin is filled in a hollow portion of the lid panel, and the lower surface of the lid flange is formed around the entire circumference of the opening of the container. The projection to be fitted is such that when another container is stacked on the lid panel, a projection which fits around the bottom of the container at the upper stage almost all around is formed on the top surface of the lid panel. The collapsible transport insulation container according to claim 7. 9. A storage chamber is formed inside the lid panel to store a cold storage agent package containing a cold storage agent, which is a shallow recess reaching almost the periphery. The storage chamber supports the pack. The foldable insulated container for transportation according to claim 7 or 8, further comprising a mesh or lattice-shaped lid having a ventilation characteristic, and a locking means, which is a kind of a locking band.