JP4984245B2 - Insulated double container - Google Patents

Description

  The present invention is a combination of a top-opening tray-like container mainly formed by punching paperboard and the like and a cylindrical body formed by punching the same paperboard mounted on the outer peripheral portion of the side surface of the tray-like container. It relates to an insulated double container.

Conventionally, as a container for pouring hot water into a container for heating cooking, a molded container made of expanded polystyrene, a double container made of a paper cup, and the like are widely used. In addition, as packaging containers for cooking dishes containing ingredients etc. in a microwave oven, mainly heat-resistant molded containers and double containers with a heat insulating effect added to the peripheral wall on the molded containers are marketed. (For example, refer to Patent Document 1).
JP 2002-145356 A

  However, since the above containers use resin molded containers in whole or in part, at the time of disposal after use, the adhesion of exterior parts such as peripheral walls attached to the molded containers is strong, so the separation process There is a drawback that the volume of waste becomes bulky because it is bothersome or difficult to reduce the volume. Double containers made of paper cups are made of a single material and do not cause problems such as incineration. However, they are not as strong as the above-mentioned molded containers or to give the same strength as the molded containers. Therefore, volume reduction operations such as decomposition were difficult.

In addition, as a paper container for cooked foods and frozen foods that are coated or impregnated with fried chicken, etc., seasonings such as oil, sauce or sauce, and gravy, etc., prevent leakage of oil, seasonings, gravy etc. In this way, a web corner type paper container is used that is folded outward at a web corner portion (watering-like corner continuous portion) formed by folding pieces having four corners connected to each other and bonded to the outside of the paper container (see, for example, Patent Document 2).
JP 2004-51157 A

  This kind of web corner type paper container can be cooked by microwave oven with fried chicken etc. stored directly in the paper container, but immediately after cooking the paper container itself becomes hot and there is a risk of burns due to direct contact In addition, there is a drawback that it is difficult to carry, and there is also a disadvantage that discoloration and deformation of the furniture surface occurs when the bottom of the paper container immediately after cooking is placed on and in contact with the furniture surface.

  Accordingly, an object of the present invention is to solve the above-described problem, and is composed of an inner container and an outer container obtained by punching paperboard, and the inner container and the outer container are firmly connected by a simple operation. It can be attached to the container, and it has a heat insulation structure with a double wall as the peripheral wall of the container, enabling it to be carried without fear of burns after cooking, and after eating and drinking, the inner container can be removed from the outer container with a simple operation. It is possible to provide a heat-insulated double container that can be reduced in volume by a simple operation by flattening the inner container and the outer container after separation.

  In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that side plates are erected on each side of a polygonal bottom plate, and triangular folding pieces are continuously provided on both sides of each side plate. A web corner portion is formed in which pieces are connected to each other via a folding line extending radially from each corner of the bottom plate, and the folding pieces constituting each web corner portion are respectively stuck to the outside of a pair of side plates facing each other and stuck. The folded piece folded back to the outside of the folded piece consists of a tray-like inner container having an open upper portion that forms a locking notch with the upper end cut away, and a side wall that surrounds the outer side of the side plate of the inner container. The upper end of the pair of side walls comprises a cylindrical outer container in which a locking piece is continuously provided, and the inner container is fitted and inserted into the outer container, and the locking notch portion of the folding piece of the inner container, The outer container is folded inward Locking pieces is insulated double container, characterized in that engaging detachably.

  According to the invention of claim 2, the length of the lower side of each side plate of the inner container that contacts the bottom plate is shorter than the length of the upper side that faces the lower side, and the side plates of the inner container each have a trapezoidal shape that opens upward. It is a heat insulation double container of Claim 1 characterized by these.

  The invention according to claim 3 is the insulated double container according to claim 2, wherein the height dimension of the side plate of the inner container is shorter than the height dimension of the side wall of the outer container.

  According to a fourth aspect of the present invention, a lid plate is continuously provided on the extension of the upper side of at least one side plate of the inner container via a fold line, and the lid plate can be excised. It is the heat insulation double container in any one of.

  According to a fifth aspect of the present invention, there is provided the heat insulation according to the fourth aspect, wherein the fold line connecting the cover plates is formed by a broken line and at least one edge is notched on the cover plate side. It is a double container.

  The heat insulating double container of the present invention comprises an inner container and an outer container formed by punching paperboard, and can be firmly attached to the inner container and the outer container with a simple operation, and the container peripheral wall portion is insulated as a double wall. Provided is a cooking-use container that can form a heat-insulated double container having a structure, can be carried and operated without fear of a burn due to contact after cooking.

  In addition, after cooking food and drink using the insulated double container of the present invention, the inner container can be detached from the outer container by a simple operation, and after the separation, the inner container and the outer container can be made flat by a simple operation. Since the volume can be reduced, it is possible to reduce the volume of garbage from the home, thereby reducing waste disposal costs. Furthermore, since the heat-insulated double container of the present invention is mainly formed from paperboard as a material, generation of harmful gas due to combustion can be suppressed during the disposal process, which does not lead to environmental destruction.

  Among the heat insulating double containers of the present invention, the side plates of the inner containers each having a trapezoidal shape having an upper side dimension larger than the lower side dimension form a tray-shaped container with an open taper at the time of inner container assembly molding. It is possible to stack the stacks (in a nesting manner) and to save space during transportation and storage.

  The heat insulation double container of the present invention is such that the bottom plate of the inner container is floated inside the cylindrical outer container by making the height dimension of the side plate of the inner container shorter than the height dimension of the side wall of the outer container. Therefore, when cooking in a microwave oven, the bottom plate of the inner container is prevented from being overheated, and even when the container immediately after cooking is placed on a table or the like, the grounding part is the end face of the cylindrical outer container. Therefore, it is possible to suppress deformation and discoloration of the decorative plate or the like on the table surface. Further, when gripping the double container after cooking, it becomes difficult for the hand to touch the bottom surface of the inner container, and it is possible to prevent removal or burns due to heat.

  Moreover, in the heat insulation double container of this invention, what provided the cover plate in the upper side of the side plate of an inner container makes this coverable by a break line etc., and says that a cover plate does not become obstructive at the time of eating and drinking. effective. Furthermore, by making the notch-shaped notch at least one end of the cover plate, it is possible to clearly indicate the excision operation part and to perform a smoother excision operation.

  The present invention will be described in detail below with reference to the drawings. Fig.1 (a) is an expansion | deployment top view which shows the blank state of an inner container of the Example of the heat insulation double container which concerns on this invention. (B) is the expansion | deployment top view which shows the blank state of an outer container of an Example similarly. Fig.2 (a) is a perspective view for description which shows the assembly middle state of an Example similarly. (B) is the perspective view for description which shows the assembly completion state of an Example similarly. FIG. 3A is an enlarged end view taken along line XX in FIG. (B) is a principal part enlarged view of Fig.3 (a). FIG. 4 is a perspective view for explaining the cover plate excised state during eating and drinking after cooking in the same example.

FIG. 1A is a developed plan view showing a blank state of an inner container of an embodiment of a heat insulating double container according to the present invention, and a blank A formed by punching a sheet material such as paperboard is rectangular. In the bottom plate 1 having a shape, side plates 2 and 2 are connected to opposite sides on the left and right via folding lines L1 and L1, respectively, and side plates 3 and 3 are connected to opposite sides of the top and bottom via folding lines L2 and L2, respectively. It is installed. Triangular folding pieces 4 and 4 are connected to both sides of the side plates 2 and 2 via folding lines L3 and L3 extending radially outward from the corners of the bottom plate 1, respectively. Similarly, triangular folding pieces 5 and 5 are connected to each other via folding lines L4 and L4 extending radially outward from the corners of the bottom plate 1, and adjacent folding pieces 4 and 5 are also connected to the corners of the bottom plate 1. A portion where the folding pieces 4 and 5 are connected to each other is a web corner portion (a web-like corner continuous portion) W. Further, lid plates 6 and 6 having engagement flanges 9 and 9 are connected to the upper sides of one pair of opposing side plates 2 and 2 via fracture fold lines L7 and L7, respectively. Ear pieces 7 and 7 are connected to the upper sides of the side plates 3 and 3 via folding lines L6 and L6, respectively. [See Fig. 2]
In the figure, h1 indicated by a bidirectional arrow on a part of the side plate 3 is the vertical dimension of the inner container side plate and is the hypotenuse side dimension of the standing side plate 3, and is set shorter than the vertical dimension h2 of the outer container side wall described later. With the above setting, as shown in FIG. 3, when the inner container and the outer container are assembled and engaged, the bottom plate 1 of the inner container is formed in a cylindrical shape formed by the respective side walls 21 and 22 of the outer container. It stops when it is lifted from the lower edge of the body and is held without touching.

  Further, among the folding pieces 4 and 5 constituting the web corner portion W, each of the folding pieces 4 on the outer surface side is formed as a locking cutout portion 8 in which a triangular outer edge is shallowly cut into a V shape, When fitting with an outer container, which will be described later, a locking portion is formed by folding a locking piece 24 provided continuously from each of the side walls 22 and 22 of the outer container.

  Furthermore, the broken folding lines L7 and L7 engraved on the upper sides of the pair of side plates 2 and 2 are provided so that the cover plates 6 and 6 serving as shielding portions can be excised for eating and drinking after cooking, and Both end edges of the broken fold lines L7 and L7 are formed with notch-shaped notches 10 having notches formed on the lid plates 6 and 6 side, respectively, and when the lid plates 6 and 6 are excised, clearly indicate the cutting start portion. The cutting operation is easy to start. Similarly, the ear pieces 7 and 7 may be excised by using the fold lines L6 and L6 as the broken fold lines.

FIG. 1 (b) is a developed plan view showing a blank state of an outer container of an embodiment of a heat insulating double container according to the present invention, and a blank B formed by punching a sheet material such as paperboard is an upper side. The trapezoidal side walls 21, 22, 21, 22 and the sticking piece 23, each of which forms a tapered square cylindrical body whose peripheral edge is larger than each of the lower peripheral edges, are respectively connected via fold lines L 22, L 23, L 24, L 21. Locking pieces 24, 24 are extended through folding lines L 25, L 26 at the upper ends of the side walls 22, 22 that are sequentially provided and opposed to each other. In addition, folding lines L27 and L28 which are engraved by longitudinally cutting the widthwise central part between the respective locking pieces 24 and the side walls 22 are auxiliary folding lines. Although illustration is omitted, the outer container can be folded and stuck flat using the fold lines L21, L22, L23, L24 to form a cylindrical body part. For example, the adjacent side walls 21 and 22 are respectively In the case where the degree of taper of the trapezoidal shape is different, the auxiliary folding lines L27 and L28, which are engraved by cutting the widthwise central portion of the side wall 22 in one embodiment as described above, are provided. It is practically preferable to use and fold flatly.
In addition, h2 indicated by a bidirectional arrow on a part of the side wall 22 in the figure is the vertical dimension of the outer container side wall, and is the dimension of the oblique side of the standing side wall 22, and as described above, from the vertical dimension h1 of the inner container side plate. As shown in FIG. 3, when the inner container and the outer container are assembled and engaged, the bottom plate 1 of the inner container is made of a cylindrical body formed by the respective side walls 21 and 22 of the outer container. Stop in a state where it floats from the lower edge, and hold it without touching it.
Further, d1 indicated by a bidirectional arrow on a lead line from a part of the locking pieces 24 in the drawing is the vertical dimension of the outer container locking pieces, and each side plate 3 is assembled when the inner container to be described later is assembled. Among the folded pieces 4 and 5 that are bent and adhered to the outer surface of the folding piece 4, the cut line on the side of the broken line L 5 of the locking notch 8 cut out from the edge of the folded piece 4 becomes a horizontal cut line, It is set to be approximately equal to the dimension d2 between the cutting line and the upper edge of the inner container.

The inner and outer containers of the heat-insulated double container according to the present invention are mainly used as paperboard, but its range is wide, and it is used by selecting coated cardboard, Manila cardboard, milk carton base paper, cup base paper, etc. can do. The paper basis weight varies depending on the container size and usage, but is preferably in the range of 150 to 450 g / m ² . The heat insulating double container according to the present invention is formed by inserting a tray-like inner container into a cylindrical outer container, and therefore reduces the paper basis weight of the outer container within a range that does not lose the heat insulating effect. As a result, the overall container cost can be reduced.

In addition, depending on the contents and intended use of the inner container, it is effective to attach an oil-resistant paper or water-resistant paper due to resin impregnation or the like, or a plastic film that blocks exudates from the aqueous contents to the inner surface of the container. As the plastic film, polyethylene film, polypropylene film, polyester film, polyamide film and the like can be used. Biodegradable plastic film (polylactic acid, polyhydroxybutyrate, polylactocapton, polybutylene succinate, polyethylene succinate) , Polyvinyl alcohol, cellulose acetate, etc.) can also be used.
It is preferable that the plastic film can be peeled off and separated after use from the viewpoint of environmental friendliness and separation and disposal. As the bonding method, a method of bonding using a peelable adhesive, heat sealing or There is a method of partially bonding using a known emulsion type, solvent type, hot melt type adhesive or pressure sensitive adhesive.

Fig.2 (a) is a perspective view for description which shows the assembly middle state of the Example of the heat insulation double container based on this invention. (B) is an explanatory perspective view showing the assembled state of the embodiment in the same manner, and in assembling the inner container, a pair from one opposing side in the rectangular bottom plate 1 of the aforementioned inner container blank A is shown. The side plates 2 and 2 are each formed of a pair of side plates 3 and 3 erected obliquely upward from the other opposing side, and the side plates 2 and 3 adjacent to each other are formed by folding pieces 4 and 5 connected in series. The web corner portions W are connected to each other at the corner portions W, and the web corner portions W are respectively folded and fixed by sticking the respective folding pieces 5 to the outer surfaces of the side plates 3 and 3 to form a tray container with an upward opening taper. . At this time, as described above, the cut line on the side of the fold line L5 of the locking notch 8 obtained by cutting out the edge of the attached folding piece 4 becomes a horizontal cut line, and the cut line and the upper edge of the inner container The dimension d2 between the two is formed.
At the stage of the tray container with an opening taper, the upper sides of the cover plates 6 and 6 connected to the upper sides of one pair of side plates 2 and 2, and the upper sides of the other pair of side plates 3 and 3 facing each other. The ear pieces 7 and 7 connected to each other are open, and a plurality of stacks can be stacked (in a nested manner). Next, after the contents, that is, the cooked food or the package filled with the cooked food are put in and stored, the ear pieces 7 and 7 connected to the upper ends of the side plates 3 and 3 are folded inward, respectively, 2, while folding the cover plates 6, 6 connected to the upper end of the plate 2, the engagement flanges 9, 9 provided at the ends of the cover plates 6, 6 are engaged with each other to complete the assembly of the inner container. .

  Next, when assembling the outer container, the aforementioned outer container blank B is bent in advance using the auxiliary folding lines L27 and L28, and the one end of the side wall 22 and the sticking piece 23 are stuck to make a flat tapered cylinder. After forming the cylindrical body part and forming the tapered square cylindrical body part using the fold lines L21, L22, L23, and L24 at the time of assembly, the locking pieces 24 and 24 extending to the upper ends of the side walls 22 and 22 are formed. Is folded inward to obtain a temporary assembled state.

  The assembly completion state of the embodiment shown in FIG. 2 (b) is a state in which the inner container that has been assembled is inserted and fitted from the upper end open part of the tapered rectangular cylindrical body part of the outer container described above. For example, the size of each side edge of the upper end of the outer container and the size of each side edge of the upper end of the inner container are substantially equal (exactly, the size of each side edge of the upper end of the outer container is slightly larger), The dimensions are designed so that the lid of the inner container reaches the upper end of the outer container in advance, and the insertion is stopped when the lid of the inner container reaches the upper end of the outer container. At this time, the distal ends of the locking pieces 24, 24 that extend from the upper ends of the one opposing side walls 22, 22 of the outer container and are folded inwardly are in contact with the side plates 3, 3 of the inserted inner container, The inner container and the outer container are respectively engaged with the end surfaces of the notches 8 and 8 of the folded pieces 4 and 4 of the web corner portion W adhered to the outer surfaces of the side plates 3 and 3 of the inserted inner container. The stop position is maintained and the assembly is completed. Normally, after the mounting of the inner container and the outer container is completed, the product is commercialized by being encapsulated by thermal shrinkage of a shrink film or the like.

  In the assembled state of FIG. 2 (b), that is, the fitting and locking state of the inner container and the outer container, as shown in the enlarged end view taken along the line XX of FIG. The end surfaces of the engaging pieces 24 extended from the side wall 22 of the outer container are engaged with the engaging cutout portions 8 of the folded piece 4 folded back from the folded piece 5 so that the upper end portion of the inner container is It stops at a position substantially equal to the upper edge of the outer container. As described above, the side plate vertical dimension h1 of the inner container is slightly shorter than the side wall vertical dimension h2 of the outer container. In the state where it floats from the lower end edge of the cylindrical body formed by the side walls 21 and 22, it becomes a state where it does not come into contact with the ground, and during the microwave cooking, it prevents overheating of the bottom plate portion of the inner container and When placing on a table, etc., the part to be grounded has a cylindrical outer Since the end surface of, suppressing deformation and discoloration of the veneer or the like of the table surface.

  FIG. 4 is an explanatory perspective view showing the state of the cover plate cut out during eating and drinking after cooking in the same embodiment. The cover plate 6 on the front side in the figure has already been cut off, and the cover plate 6 on the back side has a notch notch 10. The state in the middle of excision using the fracture line L7 as a starting point is shown. Usually, the consumer removes the product envelope, opens the lid, performs a predetermined operation on food or the like contained in the inner container, reseals the lid, and cooks with a microwave oven. Since the lid plates 6 and 6 at the upper end of the tray-like inner container are relatively large when eating and drinking after cooking, the upper sides of the side plates 2 and 2 are constituted by broken fold lines L7 and L7 when they interfere with eating and drinking. Therefore, it can be excised as shown in the figure. Similarly, the ear pieces 7 and 7 may be excised by using the fold lines L6 and L6 as the broken fold lines. Further, in the embodiment, notch-shaped notches 10 are formed on the lid plate 6 side at both ends of the broken folding lines L7 and L7 to clearly indicate the excision operation portion of the lid plate 6 and facilitate the excision operation. It is said.

Although not shown in the drawings, when the container is discarded after eating and drinking with the heat-insulated double container according to the present application, the fitted state between the outer container and the inner container is released, that is, the folding piece 4 of the inner container is locked. After removing and separating the locking pieces 24 of the outer containers locked to the notches 8, the outer containers can be folded as they are, and the inner containers are peeled off the folded pieces at the web corners attached to the side plates. Thus, a flat blank can be obtained, and the volume can be reduced and discarded.
Further, as described above, since the heat insulating double container according to the present invention is mainly formed of paperboard, it is possible to suppress generation of harmful gas due to combustion in the disposal process, and it does not lead to environmental destruction. Depending on the contents and intended use, when a plastic film is bonded, it is preferable that it can be peeled off after use from the viewpoint of environmental friendliness and separation and disposal.

(A) is an expansion | deployment top view which shows the blank state of an inner container of the Example of the heat insulation double container which concerns on this invention. (B) is the expansion | deployment top view which shows the blank state of an outer container of an Example similarly. (A) is the perspective view for explanation which shows the state in the middle of the assembly of the execution example similarly. (B) is the perspective view for description which shows the assembly completion state of an Example similarly. (A) The XX line enlarged end elevation in Drawing 2 (b). (B) is a principal part enlarged view of Fig.3 (a). Similarly the explanatory perspective view which shows the cover plate cutting state at the time of eating and drinking after cooking of an Example.

Explanation of symbols

A Inner container blank B Outer container blank 1 Bottom plate 2, 3 Side plate 4, 5 Folded piece 6 Lid plate 7 Ear piece 8 Locking notch 9 Engagement piece 10 Notch-shaped notch 21, 22 Side wall 23 Sticking piece 24 Locking Piece L1 to L6 Folding line L7 Breaking fold line L21 to L26 Folding line L27, L28 Auxiliary fold line W Web corner h1 Inner container side plate vertical dimension h2 Outer container side wall vertical dimension d1 Outer container locking piece vertical dimension d2 Inner container upper edge-Locking notch Dimensions between parts

Claims (5)

Side plates are erected on each side of the polygonal bottom plate, triangular folding pieces are connected to both sides of each side plate, and adjacent folding pieces are connected via folding lines that extend radially from each corner of the bottom plate. Web corner portions connected to each other are formed, and the folded pieces constituting the respective web corner portions are adhered to the outsides of a pair of opposing side plates, respectively, and the folded pieces folded back to the outside of the adhered folded pieces have the upper ends thereof. A tray-shaped inner container with an open upper portion that forms a notch engaging notch and a side wall that surrounds the outside of the side plate of the inner container, and a locking piece is provided at the upper end of a pair of opposing side walls. A locking piece formed by inserting the inner container into the outer container and bending the inner container into the locking notch of the folding piece of the inner container. Is detachably engaged Insulated double container. 2. The length of the lower side of each of the side plates of the inner container that is in contact with the bottom plate is shorter than the length of the upper side that faces the lower side, and each of the side plates of the inner container has a trapezoidal shape that opens upward. Insulated double container as described. The insulated double container according to claim 2, wherein a height dimension of a side plate of the inner container is shorter than a height dimension of a side wall of the outer container. The heat insulation according to any one of claims 1 to 3, wherein a cover plate is continuously provided on an extension of an upper side of at least one side plate of the inner container via a broken line, and the cover plate can be excised. Double container. 5. The insulated double container according to claim 4, wherein a folding line connecting the lid plates is formed by a broken line and at least one end edge has a notch-like portion cut out on the lid plate side.

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