JP2004315032A - Cup type insulated container - Google Patents

Abstract

In a packaging container also serving as a cooking container for an instant food or the like, a combination of a plastic container main body and a paper cylindrical body is excellent in preserving various contents and is stabilized by a simple joining method for a heat insulating space. Provided is a cup-type heat-insulating container that forms a gap, is easy to separate after use, and has a low environmental load when disposed.
An inverted truncated cone-shaped plastic container body having a flange at an upper opening edge and having a body side wall having an inward horizontal rib formed near an upper end and / or a lower end, and a bottom plate; An inverted truncated cone-shaped paper cylinder having an inward curl portion at an end thereof, and the paper cylinder is attached so as to cover the body side wall of the plastic container body, and at least one of the upper and lower ends. A cup-shaped heat insulating container characterized in that an inward curl portion is fitted to an inward horizontal rib near the upper end and / or near the lower end.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cup-type insulated container used for instant foods, microwave cooked foods, and the like.
[0002]
[Prior art]
Conventional heat insulation containers for food, particularly those that also serve as distribution packaging, have two systems, plastic and paper. Typical plastic insulation containers are used for instant noodles, miso soup, etc. There is a molded container made of polystyrene foam. Further, there has been proposed an insulated container in which a plastic gap formed by two sheet moldings is double-fitted to form a space in the side wall. On the other hand, a typical paper-based heat-insulating container is one in which a paper-made cylindrical body having an uneven cross-sectional shape is wound as a heat insulating material around the outer periphery of the body of a paper cup body also used for instant noodles and the like. is there. More recently, an insulated container has been proposed in which a paper tubular body having a curl at the bottom is inserted into the side wall of the paper cup body and bonded at the top to form a space between the side walls. However, the cup-type insulated containers proposed and marketed so far are mainly cup-type insulated containers used for instant noodles. For example, powdered soups, liquid soups, raw ingredients, and the like have been sealed in separate plastic film bags and stored and distributed. Also, even if the container body is plastic, after filling the contents, it is not a long-term storage container that performs sterilization processing such as retort, but as a collective storage container for instant noodles and other bagged contents and as a food and drink tool Had the function of
[0003]
With the spread of microwave ovens, the number of cooked foods has increased remarkably, and the following proposals have been made to solve the problem of preserving foods with sap even in cup-type insulated containers. That is, the main body for directly enclosing the food is a plastic container, a paper cylinder is inserted into the plastic container, and the outward projection formed on the plastic container body and the inner surface of the paper cylinder are brought into contact with each other. The lower end portion and the inward curl portion of the lower end portion of the paper cylinder are brought into contact with each other to form a space between the side walls of the body. (See, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-7058
However, in the combination of the plastic container main body and the paper cylindrical body, as a means for bonding the same, the invention according to the above-mentioned Patent Document 1 discloses a technique in which they are brought into contact with each other. In such a case, there is a problem that it comes off during transportation or use, and it is necessary to bond any one of the contact portions. Also, the following device has been disclosed (for example, see Patent Document 2). In other words, it consists of a tapered outer cylinder and an inner cylinder made of paper. An annular groove is formed on the inner peripheral surface below the upper end of the outer cylinder, a curl is formed on the inner peripheral edge of the lower end, and a curl is formed on the outer peripheral edge of the inner cylinder upper end. An annular groove is formed on the upper outer peripheral surface of the lower yarn foot, and the curl at the upper peripheral edge of the inner cylinder is fitted and adhered to the annular groove below the upper end of the outer cylinder. As a means for joining the outer cylinder and the inner cylinder, a fitting technique is disclosed, but an annular groove formed on the periphery of the body is deeply and clearly carved. It is difficult to perform the process, and the paper does not have sufficient stability in the depth of the groove due to the hygroscopic property and the restoring force of the paper.
[0006]
[Patent Document 2]
Japanese Utility Model Publication No. 50-52003
As described above, when an adhesive is used to join the outer container and the inner container, the adhesive effect is likely to deteriorate due to the temperature conditions during transfer and storage, particularly in the case of a product placed in a frozen state or a chilled state. In addition, the container may fall off due to peeling, or may generate an unpleasant odor during cooking and heating, particularly when using a microwave oven, or peeling may occur due to a change in melting of the adhesive. In addition, because of the bonding using an adhesive, there is a drawback that it is difficult to separate a plastic container and a paper tube when discarding after use.
[0008]
[Problems to be solved by the invention]
Then, this invention is made in order to solve the said problem, and the aim is also to serve as a cooking container, such as a packaged food so-called cooked food, semi-cooked food or instant food. In the packaging container, the combination of the plastic container main body and the paper cylindrical body provides excellent preservation of various contents and forms a stable heat insulating space by a simple joining method, and furthermore, the separation after use is easy. Provided is a cup-type insulated container that is easy and has a low environmental load at the time of disposal.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is an inverted structure comprising a bottom wall and a body side wall having a flange at an upper opening edge and having an inward horizontal rib formed near an upper end and / or a lower end. It consists of a truncated cone-shaped plastic container body and an inverted truncated cone-shaped paper cylinder having inward curls at the upper and lower ends, such that the paper cylinder covers the body side wall of the plastic container body. A cup-type heat-insulating container, wherein at least one of the upper and lower inwardly curled portions is fitted to an inward horizontal rib near the upper end and / or near the lower end, the cup-shaped heat insulating container being made of a plastic container body and paper. By forming the joint with the cylindrical body by fitting, the gaps for heat insulation at the upper and lower ends are formed substantially uniformly, and stable fixing is achieved.
[0010]
According to a second aspect of the present invention, an inverted truncated cone-shaped plastic container main body includes a bottom wall and a body side wall having a flange at an upper opening edge and an outward horizontal rib formed near an upper end and / or a lower end. And an inverted frustoconical paper cylinder having an inward curl at the upper and lower ends, the paper cylinder is mounted so as to cover the body side wall of the plastic container body, and A cup-shaped heat insulating container characterized in that at least one inward curl portion is engaged with an upper part of an outward horizontal rib near an upper end and / or a lower end, wherein the plastic container main body and the paper cylindrical body are connected to each other. The joint is formed by engagement, and by engaging with the upper part of the outward horizontal rib, the heat insulating space gaps at the upper and lower ends are formed uniformly, and stable fixing is achieved.
[0011]
The invention according to claim 3 is the cup-type insulated container according to claim 2, wherein the outward horizontal rib is provided so as to intermittently circulate around a body side wall of the plastic container body. By providing the outward horizontal rib intermittently around the body side wall, the inward curl of the paper tubular body can be smoothly engaged during assembly, and can be disposed of after use. In, the removal operation for separation can be easily performed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described below in detail with reference to the drawings and the like.
FIG. 1 is an explanatory view of the configuration of a first embodiment of a cup-type heat insulating container according to the present invention. FIG. 2 is a configuration explanatory view of a second embodiment of the cup-shaped heat insulating container according to the present invention. FIG. 3 is an explanatory view of the configuration of a third embodiment of the cup-shaped heat insulating container according to the present invention. FIG. 4 is an explanatory view of the configuration of a fourth embodiment of the cup-shaped heat insulating container according to the present invention. FIG. 5A is a bottom view of the plastic container body 10 of the third embodiment. FIG. 5B is a bottom view of the plastic container body 10 of the fourth embodiment.
[0013]
FIG. 1 is an explanatory view of a configuration of a first embodiment of a cup-shaped heat insulating container according to the present invention. As shown in FIG. 1, a cup-shaped heat insulating container 40 of the first embodiment has a body having a flange 3 on an upper opening edge. A paper cylindrical body 20 is mounted around the body side wall 1 of the inverted truncated cone-shaped plastic container body 10 having a large opening at the top composed of the side wall 1 and the bottom plate 2. The upper end inward curl portion 5 of the paper tubular body 20 is fitted to the inward horizontal rib 4 formed near the upper end, and the lower end inwardly close to the lower end of the body side wall 1 of the plastic container body 10. The curl portion 6 comes into contact with the heat insulating space gap A between the two.
[0014]
The plastic container body 10 is formed by a sheet forming (vacuum / pressure forming) method using a synthetic resin sheet, or is formed into a cup shape by an injection molding method. The synthetic resin sheet may be a sheet made of a single resin that can be formed into a sheet by a well-known molding method, or a sheet obtained by laminating these resins by a well-known laminating method, for example, a coextrusion method, a dry lamination method, or an extrusion lamination method. If it is a laminated sheet laminated, etc., it can be appropriately selected and used according to the contents to be stored, but in consideration of storability, shape retention, heat resistance, oil resistance, hot water resistance, or ease of disposal treatment. A sheet made of a polypropylene resin alone or a laminate made of a polypropylene resin as a base is suitable.
A lid member 30 made of a laminated sheet having a sealant layer as the innermost layer is heat-sealed on the upper surface of the upper flange 3 so as to be peelable.
[0015]
On the other hand, the paper tubular body 20 is formed by sticking a blank plate obtained by punching a paperboard into a fan shape to form an inverted frustoconical body, and curling the upper and lower ends inward to form an upper inward curl portion 5 and a lower end inward. The curl portion 6 is formed. Paperboard for use in paper cylindrical body 20 is paperboard having a basis weight of 160g ^/ m ² ~600g / m 2 can be used simultaneously with the influence printability of the surface design of the plane rigidity of the cooking vessel is required balance between bets inward curled portion of the workability, a basis weight 230g ^{/ m 2} ~400g ^/ m 2 of coated cardboard, or 160g ^{/ m 2} ~370g ^/ m 2 of cardboard can be suitably used. If the basis weight of the paperboard is less than this limit, the rigidity of the paper tubular body 20 becomes low, and the bending becomes large especially at high temperature, so that the space gap cannot be maintained, and the paperboard 20 comes into contact with the plastic container body 10 and becomes insulated. No effect. Exceeding this limit increases the rigidity, but deteriorates the suitability of the inward curling process at the upper and lower ends and increases the material cost, which is not preferable. In order to form a space gap for obtaining a suitable heat insulating effect, it is preferable that the inward curl portion to be curled using the paperboard having the above-mentioned basis weight has a width and a height of 3 mm to 5 mm. The material of the paper tubular body 20 is further subjected to resin coating or resin impregnating treatment, etc., thereby improving the rigidity, compression resistance, crush resistance, etc. of the entire cup-shaped heat insulating container 40 of the present invention, and externally acting during distribution. Can function to protect the contents from excessive force.
[0016]
The inward horizontal ribs 4 formed in the vicinity of the upper end of the body side wall 1 protrude inward around the body side wall 1, and as described above, the upper end inward curl portion of the paper tubular body 20. 5 is fitted, and the width and depth are designed so as to form a space A for heat insulation at the upper end. The paper tube 20 is firmly fixed at the time of fitting of the tubular body 20, and is used after being used. At the time of disposal, the depth of the inward horizontal rib 4 is usually determined by the width of the inward curl portion. It is desirable that the dimension is half to slightly larger than half of the dimension, and the width dimension is desirably the same or slightly larger than the height dimension of the inward curl portion. Thereby, the upper inward curl portion 5 of the paper tubular body 20 is fitted to the inward horizontal rib 4, and the heat insulating space gap A formed at the upper end portion becomes approximately 1.5 mm to 2.5 mm. Thus, a suitable heat insulating effect can be obtained. In the first embodiment, the inner diameter of the upper end inward curl portion 5 of the paper tubular body 20 is slightly smaller than the outer diameter of the upper portion of the body side wall near the upper end, and the inner diameter of the lower end inward curl portion 6 is It is the same size as the outer diameter of the contact position near the lower end of the side wall 1.
[0017]
FIG. 2 is an explanatory view of the configuration of a second embodiment of the cup-type heat insulating container according to the present invention. As shown in FIG. 2, the cup-type heat insulating container 40 of the second embodiment has a flange 3 on the upper opening edge. A paper tubular body 20 is fitted around the body side wall 1 of the inverted truncated cone-shaped plastic container body 10 having a large opening at the top, which is composed of a body side wall 1 provided with a stack rib near the upper end and a bottom plate 2. A lower end inward curl portion 6 of the paper tubular body 20 is fitted into an inward horizontal rib 4 formed near a lower end of the body side wall 1 of the plastic container body 10. The upper end inward curl portion 5 is brought into contact with the vicinity of the upper end of the body side wall 1 to form a heat insulating space gap A therebetween. By making the overhang dimension of the stack rib provided near the upper end of the body side wall 1 substantially equal to the width of the upper inward curl portion 5 of the paper cylindrical body 20, the plastic container main body 10 The finished surface at the upper end portion by fitting with the paper tubular body 20 can be in a state with less unevenness.
[0018]
The inward horizontal ribs 4 formed in the vicinity of the lower end of the body side wall 1 circulate around the body side wall 1 and protrude inward. 6, the width and the depth are designed so as to form a space A for heat insulation at the lower end, and are firmly fixed when the paper tubular body 20 is fitted. At the time of disposal, it can be appropriately determined at the container designing stage so that the paper tubular body 20 can be easily separated. In the second embodiment, the inner diameter of the lower end inward curl portion 6 of the paper tubular body 20 is slightly smaller than the outer diameter of the fitting position near the lower end of the body side wall, and the inner diameter of the upper end inward curl portion 5 is smaller. Is substantially the same as the outer diameter of the abutment position near the upper end of the body side wall 1.
[0019]
FIG. 3 is an explanatory view of the configuration of a third embodiment of a cup-shaped heat insulating container according to the present invention. As shown in FIG. A cylindrical body 20 made of paper is fitted around a body side wall 1 of an inverted truncated cone-shaped plastic container body 10 having a large opening at an upper portion composed of a side wall 1 and a bottom plate 2, and a body side wall 1 of the plastic container body 10 is provided. The upper inward curl portion 5 of the paper tubular body 20 is engaged with the upper part of the outward horizontal rib 4 ′ formed near the upper end of the plastic container body 10, and the vicinity of the lower end of the body side wall 1 of the plastic container body 10. The lower end inwardly curled portion 6 is in contact with the lower end, and a space A for heat insulation is formed between the two.
[0020]
The outward horizontal ribs 4 ′ formed near the upper end of the body side wall 1 circulate around the body side wall 1 or intermittently as shown in FIG. 3 and FIG. The upper end inward curl portion 5 of the paper tubular body 20 is engaged with the upper portion of the outward horizontal rib 4 ′, contacts the upper end portion of the body side wall, and the lower end inward curl portion 6. Is designed to contact the lower end portion of the body side wall 1 to form a space A for heat insulation, and is firmly fixed at the time of engagement of the paper tubular body 20, and at the time of disposal after use. In the container design stage, the width and size of the paper tubular body 20 can be appropriately determined so that the paper tubular body 20 can be easily separated. In the third embodiment, the inner diameter of the upper end inward curl portion 5 of the paper tubular body 20 is substantially the same as the outer diameter of the abutting position near the upper end of the body side wall, and the inner diameter of the lower end inward curl portion 6 is The outer diameter is substantially the same as the outer diameter of the contact position near the lower end of the body side wall 1.
[0021]
FIG. 4 is an explanatory view of the configuration of a fourth embodiment of the cup-shaped heat insulating container according to the present invention. As shown in FIG. A cylindrical body 20 made of paper is fitted around a body side wall 1 of an inverted truncated cone-shaped plastic container body 10 having a large opening at an upper portion composed of a side wall 1 and a bottom plate 2, and a body side wall 1 of the plastic container body 10 is provided. The lower end inward curl portion 5 of the paper tubular body 20 is engaged with the upper part of the outward horizontal rib 4 formed near the lower end of the plastic container body 10 and the upper end of the body side wall 1 of the plastic container body 10 is located near the upper end. The upper end inwardly curled portion 6 is in contact with a heat insulating space gap A formed therebetween.
[0022]
The outward horizontal ribs 4 ′ formed near the lower end of the body side wall 1 circulate around the body side wall 1 or intermittently as shown in FIG. 3 and FIG. The lower end inward curl portion 6 of the paper tubular body 20 is engaged with the upper portion of the outward horizontal rib 4 ′, contacts the lower end portion of the body side wall, and the upper end inward curl portion 5. Is designed to abut the upper end of the body side wall 1 to form a space A for heat insulation, and is firmly fixed when the paper tubular body 20 is engaged, and is disposed at the time of disposal after use. In the container design stage, the width and size of the paper tubular body 20 can be appropriately determined so that the paper tubular body 20 can be easily separated. In the fourth embodiment, the inner diameter of the upper end inward curl portion 5 of the paper tubular body 20 is substantially the same as the outer diameter of the contact position near the upper end of the body side wall, and the inner diameter of the lower end inward curl portion 6 is The outer diameter is substantially the same as the outer diameter of the contact position near the lower end of the body side wall 1.
[0023]
The inward horizontal ribs 4 provided on the plastic container main body 10 shown in FIGS. 1 and 2 and the outward horizontal ribs 4 'provided on the plastic container main body 10 shown in FIGS. In order to be combined, it is preferable to be high in the protruding direction and sharp at the corners. However, when the plastic container body 10 is molded by the vacuum / pressure molding method, it is necessary to set the degree of protrusion to the extent that the plastic container body 10 can be extracted from the mold, so that the inward horizontal rib 4 and the outward horizontal rib 4 ′ are required. Each shape has its own limitations. This limit also depends on the material of the synthetic resin sheet used.
[0024]
FIG. 5A is a bottom view of the plastic container body 10 of the third embodiment. As described above, the outward horizontal rib 4 ′ is intermittently provided at a predetermined position near the upper end of the body side wall 1 of the plastic container body 10. Engagement of the inward curl portion 5 at the upper end of the paper tubular body 20 in comparison with a circumferentially provided outer rib 4 ′ provided continuously around the body side wall 1. The operation is easy, and the sorting operation at the time of disposal is also easy. That is, in the case where the outward horizontal ribs 4 ′ are continuously circulated around the body side wall 1, the ribs cannot be engaged unless pressure is applied uniformly over the entire circumference. When the ribs 4 ′ are provided, partial engagement can be performed, and finally, engagement over the entire circumference of the upper end inward curl portion 5 can be performed. FIG. 5B is a bottom view of the plastic container main body 10 of the fourth embodiment. The outward horizontal rib 4 ′ intermittently circulates at a predetermined position near the lower end of the body side wall 1 of the plastic container main body 10. As described above, the engagement of the inward curl portion 6 at the lower end of the paper tubular body 20 and the sorting operation at the time of disposal can be easily performed as described above.
[0025]
【The invention's effect】
As described above, the cup-type insulated container of the present invention is a packaged food that is a so-called cooked food, a semi-cooked food, an instant food, or the like. Is performed by a simple joining method, i.e., fitting or engaging, so that the plastic container main body and the cover material are provided with moisture proof property, excellent in the preservability of the contents by providing oxygen barrier properties, etc. It is also possible to join with a paper tubular body after the contents are filled and sealed and a sterilization treatment is performed. Also, since no adhesive or the like is used for bonding, the whole container has excellent heat resistance and cold resistance, can be distributed in a frozen state or a chilled state, and can be cooked by a microwave oven. There is no off-flavor generation.
[0026]
Since the upper and lower ends of the paper cylindrical body are curled inward, the paper cylindrical body has rigidity. Therefore, the thickness of the plastic container body to be joined can be reduced, and the weight of the entire container can be reduced. Further, since the upper and lower ends of the paper tubular body are curled inward to engage or engage with the plastic container main body, a stable heat insulating space gap is formed between the upper and lower sides of both body side walls. Thus, the heat insulation effect is high, and the material of the paper tubular body can be selected according to the required rigidity, and the rigidity of the whole container is high, so that physical safety as a cooking container can be obtained. Moreover, since no joining method such as an adhesive is used, not only the labor saving of the joining process is possible, but also the operation of separating the plastic container body and the paper tubular body by the consumer after use is easy, and The present invention provides a cup-type heat-insulating container having a low environmental load at the time of disposal because the volume can be easily reduced.
[Brief description of the drawings]
FIG. 1 is a configuration explanatory view of a first embodiment of a cup-type heat insulating container according to the present invention.
FIG. 2 is a configuration explanatory view of a second embodiment of the cup-shaped heat insulating container according to the present invention.
FIG. 3 is a configuration explanatory view of a third embodiment of the cup-type heat insulating container according to the present invention.
FIG. 4 is an explanatory view of the configuration of a fourth embodiment of the cup-shaped heat insulating container according to the present invention.
FIG. 5A is a bottom view of a plastic container body 10 according to a third embodiment.
(B) is a bottom view of the plastic container body 10 of the fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body side wall 2 Bottom plate 3 Flange 4 Inward horizontal rib 4 'Outward horizontal rib 5 Upper end inward curl part 6 Lower end inward curl part 10 Plastic container main body 20 Paper tubular body 30 Cover material 40 Cup according to the present invention Type heat insulation container A Space gap for heat insulation

Claims (3)

An inverted truncated cone-shaped plastic container body having a flange at an upper opening edge, a body side wall having an inward horizontal rib formed near an upper end and / or a lower end, and a bottom plate; An inverted truncated cone-shaped paper cylinder having a direction curl portion, wherein the paper cylinder is mounted so as to cover the body side wall of the plastic container main body, and at least one of the upper and lower ends has an inward curl portion. Are fitted in inward horizontal ribs near the upper end and / or near the lower end. An inverted truncated cone-shaped plastic container main body having a flange at an upper opening edge and having a body side wall and an outer horizontal rib formed near an upper end and / or a lower end, and a bottom plate; An inverted truncated cone-shaped paper cylinder having a direction curl portion, wherein the paper cylinder is mounted so as to cover the body side wall of the plastic container main body, and at least one of the upper and lower ends has an inward curl portion. Is engaged with the upper part of the outward horizontal rib near the upper end and / or near the lower end. The cup-shaped heat insulation container according to claim 2, wherein the outward horizontal rib is provided so as to intermittently circumvent the body side wall of the plastic container body.

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