JP2005306390A - Packaging body with lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging body with a lid which allows a lid to be easily removed from or fitted on a container body, enables strong engagement between the lid and the container body, maintains the engagement between the lid and the container body even when heated rapidly in a microwave oven, and is well adapted for microwave cooking. <P>SOLUTION: The packaging body with the lid 1 is equipped with the container body 2 and the lid 3, and the lid 3 is engaged with the container body 2 on the inside thereof for closing. A projection 241 and a recession 242 are formed on the inner peripheral surface 24 of an opening 21 of the container body 2, and a projection 331 is formed on the outer periphery 33 of the lid 3. The projection 331 of the lid 3 is fitted into the recession 242 of the container body 2. When the package 1 is heated rapidly in a microwave oven after being frozen, the engagement between the container body 2 and the lid 3 is maintained. The packaging body 1 is, therefore, usable as a container with the lid for storing a cooking food. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lidded package suitable for microwave cooking, because the fitting strength between the container body and the lid is excellent while the fitting strength between the two is excellent.

  With the spread of convenience stores in recent years, various cooked foods such as pasta, lunch boxes and prepared dishes are widely distributed or sold. Since this cooked food is stored in a predetermined container and sold, and can be easily cooked by simply heating it with a microwave while storing the food, it is easily used and eaten mainly by young people.

  As a container for storing such cooked food, it is preferably formed of a lightweight and inexpensive synthetic resin because it is a disposable application that is discarded after use, and a container body for containing cooked food A container with a lid, which is a separate body from the container main body and is made of a lid that covers the opening of the container main body, is widely used.

  Further, in this container with a lid, a so-called inner fitting type fitting configuration in which the lid is fitted inside the peripheral edge of the container main body is widely applied. Specifically, a thermoplastic resin foam is used. A container body made of a sheet and a synthetic resin lid that can be attached to the container body, and a fitting portion is formed over the entire circumference in the vicinity of the inner surface opening of the container body. There is provided a container with a lid in which the outwardly facing surface of the lid is fitted internally (for example, Patent Document 1).

  FIG. 4 is a cross-sectional view showing a fitting configuration of the container body 200 and the lid body 300 in the conventional lidded container 100 adopting the internal fitting type. As shown in FIG. 4, the conventional lidded container 100 is provided with a fitting portion made of an undercut 210 with respect to the inner peripheral surface 202 of the opening 201 of the container main body 200. On the other hand, the outwardly facing surface 301 of the lid 300 is fitted.

  On the other hand, cooked foods are distributed or sold at room temperature or in a chilled state (refrigerated at a non-freezing temperature around 0 ° C.) in a state of being stored in a container with a lid as shown in FIG. However, in recent years, in view of the diversification of cooked foods and the preservability of the foods, a container with a lid containing cooked foods is kept at 0 ° C. or lower ( For example, it may be frozen to about −20 to −30 ° C. and then cooked in a microwave oven.

JP-A-9-323743 (Claim 1, FIG. 2)

  However, in the case of cooking by heating rapidly in a microwave oven from a state frozen at about -20 to -30 ° C, the conventional lidded container having the configuration shown in FIG. When the internal pressure of the container rises due to heating, the fitting state between the container main body and the lid body is easily released, and there is a problem that the lid body is easily detached from the container main body.

  In addition, for resin materials that make up the lid of the lidded container, polystyrene resins have been used in the past, but because the temperature rises during cooking in the microwave oven, there is an alternative to more heat-resistant polypropylene resins. It was desired.

  Therefore, the object of the present invention is that the container main body and the lid can be easily attached and detached, while the fitting strength between them is excellent, and the container main body and the lid are fitted even when heated rapidly by a microwave oven. Therefore, it is in providing the package body with a favorable lid | cover for microwave oven cooking.

  In order to solve the above-mentioned problem, a lidded package of the present invention is a package with a lid that includes a container body and a lid, and is closed by fitting the container body and the lid inside. A convex portion and a concave portion are formed on the inner peripheral surface of the opening of the main body, and a convex portion is formed on the outer peripheral portion of the lid body, and the concave portion of the container main body and the convex portion of the lid body are fitted. It is characterized by.

The package with a lid according to the present invention includes a container body and a lid, and both of them are internally fitted and closed, while the internal fitting is convex with respect to the inner peripheral surface of the opening of the container body. And forming a convex portion on the outer peripheral portion of the lid body, and the concave portion of the container body and the convex portion of the lid body are fitted. The combined state is good, and the package with a lid having excellent fitting strength is obtained while both can be easily attached and detached. Therefore, for example, even when heated in a microwave oven for a long time in a frozen state, the fitting state between the container body and the lid body is released by heating in the microwave oven and increasing the internal pressure of the container. Can be suitably prevented.
And according to this fitting configuration, the feeling of wearing when the lid is fitted to the container main body is also good, and it can be confirmed that the two are firmly fitted by emitting a light sound at the time of fitting. There is also a secondary effect.

  Here, in the present invention, “a package with a lid in which a container body and a lid body are fitted together” generally means that the opening of the container body projects outward when the lid body is fitted into the container body. This refers to a package with a lid in which the outer peripheral part of the lid is fitted to a position corresponding to the inside of the container in the overhanging part (for example, a flange-like flange part).

In the lidded package of the present invention, the above-described lid is preferably made of a polypropylene resin.
According to this invention, since the lid is made of polypropylene resin, the above effects can be suitably achieved while applying the lid made of polypropylene resin in combination with the above-described fitting configuration. It is possible to provide a lidded package that can be used.
In addition, since the polypropylene-based resin is a general-purpose resin, the molding process is easy, and the lid constituting the package with lid can be manufactured at low cost. Furthermore, since a polypropylene resin has high heat resistance, it can sufficiently cope with cooking in a microwave oven.
Further, by using a polypropylene resin as the lid, a good initial fitting property can be obtained even with a deep inner fitting configuration that is difficult to fit with a polystyrene resin lid.

In the lidded package of the present invention, the haze value of the lid is preferably 30% or less.
According to the present invention, since the haze value of the lid made of polypropylene resin is within a specific range, it is possible to suitably provide a polypropylene resin lid having good transparency and high commercial value. Moreover, since the transparency of a cover body is favorable, the state of the cooked food accommodated will appear clearly and it can also increase purchase willingness.
In addition, the value measured based on JISK7136 can be used for the haze value of this cover body.

It is preferable that the bottom part of the convex part formed in the above-mentioned cover body is a curl shape.
According to the present invention, since the bottom portion of the lid body has a curl shape, it is easy to fit the convex portion of the lid body into the concave portion formed on the inner peripheral surface of the container body, and the fitting between the container body and the lid body is efficient. Can be done automatically.

In the package with lid of the present invention, it is preferable that both the container body and the lid are made of polypropylene resin.
According to this invention, since the container main body and the lid body, which are constituents of the lidded package, are made of the same kind of resin material as a polypropylene resin, the container main body and the lid body are discarded without being separated. It is possible to recycle the materials together, and the package with a lid is excellent in recyclability.
In addition, the package with a lid is made of polypropylene resin, and the container body and the lid are internally fitted, so that even if it is in a refrigerated state, it will not crack due to a light impact, etc., and low temperature impact resistance is good Thus, it is possible to provide a package with a lid having a high commercial value.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 is the schematic which showed the one aspect | mode of the package body 1 with a lid | cover of this invention, FIG. 1 is the schematic of the package body with a lid | cover (however, the container main body 2 and the lid body 3 were isolate | separated). Status)
FIG. 2 is a cross-sectional view showing a fitting configuration of the container body and the lid. 1 and 2, reference numeral 1 denotes a package with a lid, 2 denotes a container body, and 3 denotes a lid.

  As shown in FIG.1 and FIG.2, the package body 1 with a lid | cover of this embodiment is equipped with the container main body 2 and the cover body 3, and this container main body 2 and the cover body 3 are obstruct | occluded by what is called an internal fitting. It will be. Specifically, the lid 3 is located at a position (inner peripheral surface 24) corresponding to the inner side of the container (a flange portion 25 described later) where the opening 21 of the container main body 2 projects outward. Can be fitted.

  The container main body 2 constituting the package 1 with a lid is for storing articles such as cooked food therein, and as shown in FIG. 1, a substantially circular opening portion 21, a bottom surface portion 22, A side surface portion 23 is formed so as to be inclined downward from the opening portion 21 toward the bottom surface portion, and an inner surface of the side surface portion 23 near the opening portion 21 is an inner peripheral surface 24 of the container body 2.

Further, a flange-like flange portion 25 is formed on the entire circumference of the opening 21 of the container body 2. As the shape of the flange portion 25 in the present embodiment shown in FIGS. 1 and 2, the U-shaped cross section is formed by extending in the horizontal outer direction from the surface to which the opening portion 21 belongs and hanging down at the outermost edge. The example which employ | adopted the skirt flange of is shown.
In addition, the container main body 2 of the present embodiment shows an aspect in which an inclined portion 26 (slope) is connected to the lower portion of the flange portion 25 so that the lid 3 can be easily inserted and fitted. Yes.

The container body 2 is preferably made of a thermoplastic resin. For example, a polyester resin such as a polystyrene resin, a polypropylene resin, or polyethylene terephthalate (PET) can be used.
In addition, inorganic fillers such as talc and calcium carbonate may be added to these materials.

Of these thermoplastic resins, it is preferable to use a polypropylene resin as a constituent material of the container body 2. Examples of polypropylene resins include, for example, polypropylene resins such as homopolypropylene, random polypropylene, and block polypropylene.
Examples thereof include propylene copolymers, and one of these may be used alone, or two or more of these may be used in combination.

  And this container main body 2 is simply by thermoforming the sheet | seat (including a foam sheet) obtained by using the above-mentioned various thermoplastic resins using a well-known extrusion molding method or a foaming extrusion molding method, for example. Can be manufactured. In addition, as the thermoforming method, various thermoforming methods such as vacuum forming method, pressure forming method, vacuum pressure forming method, plug assist vacuum forming method, plug pressure forming method, so-called hot plate forming method may be adopted. it can.

  On the other hand, the lid 3 is internally fitted with the container body 2 containing various items such as cooked food, and the entire packaging body 1 is closed, and the top surface portion 31, the side surface portion 32, and the outer peripheral portion 33. And a flange portion 35. Moreover, in this embodiment, the flange part 25 formed in the cover body 3 employ | adopts the flat flange extended and formed in a horizontal outer side direction.

The lid 3 is preferably made of a thermoplastic resin as in the case of the container body 2. For example, a polypropylene resin, a polystyrene resin, a polyester resin such as polyethylene terephthalate (PET), or the like can be used. It is preferable to consist of resin.
In addition, as a specific example of the polypropylene resin constituting the lid 3, the polypropylene resin constituting the container body 2 described above can be suitably used.

And if the packaging body 1 with a lid | cover of this invention makes a container main body 2 and the cover body 3 from a polypropylene resin, while being able to discard the container main body 2 and the lid body 3 without separating, Both can be combined and material recycled, and this is preferable because the lidded package 1 is excellent in recyclability.
Moreover, if the package 1 with a lid | cover is comprised with a polypropylene-type resin, even if it is a case where it is set as the refrigeration state, it will not be broken by a light impact etc.

Further, when the lid 3 is made of a polypropylene resin, the haze value is preferably 30% or less, and particularly preferably 15% or less. If the haze value of the lid 3 is 10% or less, it is preferable because the lid 3 is made of polypropylene resin and has good transparency, and the commercial value of the lidded package 1 can be increased.
In addition, the value measured based on JISK7136 can be used for the haze value of this cover body.

  In order to obtain the lid 3, as in the case of the container body 2 described above, a sheet obtained by using the above-described various thermoplastic resins by using a known extrusion molding method may be thermoformed. In addition, as in the case of the container body 2, such thermoforming methods are also various, such as vacuum forming method, pressure forming method, vacuum pressure forming method, plug assist vacuum forming method, plug pressure forming method, so-called hot plate forming method, etc. A thermoforming method can be employed.

The lidded packaging body 1 of the present invention is configured to fit the container body 2 and the lid body 3 configured as described above into a closed state.
FIG. 2 is a cross-sectional view showing a fitting configuration of the container body 2 and the lid 3. As shown in FIG. 2, as described above, the container body 2 is arranged in the inner direction of the opening 21 with respect to the inner peripheral surface 24 of the opening 21 following the inclined portion 26 (slope) from the flange portion 25. A convex portion 241 protruding upward and a concave portion 242 formed continuously with the convex portion 241 are provided.
On the other hand, the convex part 331 which protruded toward the outer side direction is formed with respect to the outer peripheral part 33 of the cover body 3. As shown in FIG. And in order to make the container main body 2 and the cover body 3 fit and make it a closed state, as shown in FIG. 2, the recessed part 242 formed in the internal peripheral surface 24 of the opening part 21 of the container main body 2, and a cover body The convex part 331 formed in the 3 outer peripheral part 33 should just fit.

  That is, a convex portion 241 and a concave portion 242 are formed on the inner peripheral surface 24 of the opening 21 of the container body 2, and a convex portion 331 is formed on the outer peripheral portion 33 of the lid 3, while the concave portion of the container main body 2 is formed. When the 242 and the convex portion 331 of the lid body 3 are fitted, as shown in FIG. 2, the convex portion 241 of the container body 2 is formed by forming the convex portion 331 on the lid body 3. In order to enter 332, the container main body 2 and the lid 3 are fitted well. Furthermore, when the container main body 2 and the lid body 3 are fitted to each other by the concavo-convex shape, the fitting strength between the two becomes high.

Here, as shown in FIG. 2, it is preferable that the bottom part 331a of the convex part 331 formed in the outer peripheral part 33 of the lid 3 has a curl shape. If the bottom portion 331a has such a shape, the convex portion 331 of the lid body 3 can be easily fitted into the concave portion 242 formed on the inner peripheral surface 24 of the container main body 2, so that the container main body 2 and the lid body 3 are efficiently fitted. Can be done automatically.
In addition, as shown in FIG. 2, there is a slight (a maximum clearance of about 100 to 500 μm between the concave portion 242 formed on the inner peripheral surface 24 of the container body 2 and the convex portion 331 of the lid 3. ) By providing the clearance 40, the both can be fitted more smoothly.

An example of the method of using the lidded package 1 according to the present embodiment will be described. First, a known amount is used using polypropylene to which an appropriate amount (for example, about 10 to 60% by mass with respect to the entire container body 2) is added. A polypropylene sheet having a thickness of 0.2 mm to 2 mm is produced by the extrusion molding method.
The polypropylene sheet has the shape shown in FIG. 1 by a known thermoforming method, and the convex portion 241 shown in FIG. 2 and the concave portion 242 continuous to the convex portion 241 are formed on the inner peripheral surface 24. The obtained container body 2 is obtained.

  Next, using polypropylene, a transparent polypropylene sheet having a thickness of 120 to 800 μm is produced by a known extrusion molding method, and this transparent polypropylene sheet is formed in the shape shown in FIG. 1 by a known thermoforming method. Thus, the lid 3 having the convex portion 331 shown in FIG.

  Further, for the container body 2 and the lid body 3 obtained in this way, after the predetermined cooked food (not shown) is stored in the container body 2, the lid body is fitted to the container body 2 in FIG. 2. If it fits so that it may become a combined state, the package body 1 with a lid | cover which accommodated the cooked food can be obtained.

And even if this packaging body 1 with a lid | cover is refrigerated at -20 degreeC--30 degreeC, for example, when it is a case where it heat-processes for 0.5 to 5 minutes with the microwave oven which made the output about 1500-1700W, The fitting state of the container body 2 and the lid body 3 can be maintained, and the lid body 3 is not detached from the container body 2.

The lidded package 1 of the present embodiment having the above-described configuration can exhibit the following effects.
(1) As shown in FIG. 2, as a fitting configuration of the package body 1 with a lid, a convex portion 241 and a concave portion 242 are formed on the inner peripheral surface 24 of the opening portion 21 of the container body 2, and the lid body 3. Since the convex portion 331 is formed on the outer peripheral portion 33 of the container body 2 and the concave portion 242 of the container body 2 and the convex portion 331 of the lid body 3 are fitted, the fitting state of the container body 2 and the lid body 3 is good. Thus, the fitting strength is excellent while both can be easily attached and detached. Therefore, even if it is a case where it heats for a long time with a microwave oven as a frozen state, the fitting state of the container main body 2 and the cover body 3 will be cancelled | released by heating with a microwave oven and the internal pressure of a container rising. It becomes the package 1 with a lid | cover which can prevent suitably.
Furthermore, according to the fitting configuration shown in FIG. 2, the fitting feeling when the lid 3 is fitted to the container body 2 is also good, and a light sound is emitted during fitting so that the two fit firmly. You can also check that

(2) If the lid 3 is made of a polypropylene resin, the effect (1) is preferable while applying the lid 3 made of a polypropylene resin by combining with the fitting configuration shown in FIG. It is possible to provide a package 1 with a lid that can be produced as described above.
Moreover, since the polypropylene resin is a general-purpose resin, the molding process is easy, and the lid 3 constituting the package with lid can be manufactured at low cost.
Furthermore, since the polypropylene resin has high heat resistance, it can sufficiently cope with heat treatment in microwave cooking.

(3) In addition to the lid 3, the container body 2 is also made of polypropylene resin, and the container body 2 and the lid body 3 are disposed without being separated by fitting the container body 2 and the lid body 3 inside. In addition, it is possible to recycle the materials together, and the lidded package 1 is excellent in recyclability. Further, by forming the lid-wrapped body 1 from a polypropylene resin, it is possible to provide the lid-wrapped body 1 having a high commercial value without being broken by a light impact or the like even in a refrigerated state. .

(4) By making the bottom part 331a of the convex part 331 formed in the lid 3 into a curl shape, the convex part 331 can be easily fitted into the concave part 242 of the container main body 2, and both can be efficiently fitted. Can do.

(5) By setting the haze value of the lid body 3 made of polypropylene resin to 10% or less, the lidded packaging body 1 provided with the lid body 3 made of polypropylene resin having good transparency and high commercial value; Become.
Moreover, since the transparency of the lid 3 is good, the state of the cooked food to be stored is clearly shown to the outside, and the willingness to purchase is increased.

  The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and is within the scope of achieving the object and effect of the present invention. Needless to say, modifications and improvements are included in the content of the present invention. Further, the specific structure, shape, and the like in carrying out the present invention are not problematic as other structures, shapes, and the like as long as the objects and effects of the present invention can be achieved.

  For example, in the above-described embodiment, as shown in FIG. 2, the bottom portion 331 a of the convex portion 331 formed on the outer peripheral portion 33 of the lid 3 is curled as a fitting configuration of the container body 2 and the lid 3. In addition, although a slight clearance 40 is provided between the concave portion 242 formed on the inner peripheral surface 24 of the container body 2 and the convex portion 331 of the lid, the fitting strength between the two is further increased, For example, in the case where the stored item contains a liquid, in order to prevent leakage of the stored item, a fitting configuration as shown in FIG. 3 may be adopted.

FIG. 3 is a cross-sectional view showing another embodiment of the fitting configuration of the lidded packaging body 1 without forming the bottom 331a of the convex portion 331 formed on the outer peripheral portion 33 of the lid 3 into a curled shape. The structure which eliminated the clearance 40 of the said convex part 331 and the recessed part 242 formed in the internal peripheral surface 24 of the container main body 2 as much as possible is shown.
According to the configuration shown in FIG. 3, the fitting between the container body 2 and the lid 3 is somewhat less smooth than the configuration shown in FIG. Leakage of objects can be prevented as much as possible.

  In the embodiment described above, the container body 2 and the lid body 3 made of polypropylene resin have been described as examples of means for obtaining the package body 1 with a lid. However, the present invention is not limited to this example. As a constituent material of 2 and the lid 3, a polystyrene resin or the like which is a thermoplastic resin may be used.

  In the above-described embodiment, the example in which the shape of the opening 21 of the container body 2 is substantially circular has been shown. However, the shape of the opening 21 is not limited to this, and the shape of the opening 21 may be various shapes such as a square shape and an elliptical shape. It is good also as a shape.

And in above-mentioned embodiment, as shown in FIG. 1, although the example using a skirt flange was shown as a shape of the flange part 25 formed in the opening part 21 of the container main body 2, it is not limited to this. A flat flange formed extending in the horizontal outer direction with the surface to which the opening 21 belongs, or extending in the horizontal outer direction with the surface to which the opening 21 belongs, and hangs down at the outermost edge so that the end is curled. A curling flange or the like may be employed.
In addition, the specific structure, shape, and the like in the implementation of the present invention may be other structures as long as the object of the present invention can be achieved.

  Since the package with a lid of the present invention has the characteristics that the container body and the lid are easy to attach and detach, and the fitting strength between the two is also excellent, rapid heating by a microwave oven after being frozen On the other hand, the fitting state of the container body and the lid can be maintained, and the container can be widely used as a lidded container for storing cooking foods such as pasta, prepared foods and lunch boxes.

It is the schematic which showed the one aspect | mode of the package body with a lid | cover of this invention. It is sectional drawing which showed the fitting structure of the package body with a lid | cover. It is sectional drawing which showed another aspect of the fitting structure of the package body with a lid | cover. It is sectional drawing which showed the fitting structure of the conventional container with a lid | cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Package 2 Container body 3 Lid 21 Opening part 22 Bottom part 23 Side part 24 Inner peripheral surface 25 Flange part 26 Inclined part 31 Top surface part 32 Side part 33 Outer part 35 Flange part 40 Clearance 241 Convex part 242 Concave part 331 Convex part 331a bottom 332 depression

Claims (5)

A package body with a lid that includes a container body and a lid, and is closed by being fitted inside the container body and the lid,
While forming a convex portion and a concave portion with respect to the inner peripheral surface of the opening of the container body,
Forming a protrusion on the outer periphery of the lid,
A package with a lid, wherein the concave portion of the container body and the convex portion of the lid body are fitted. The package with lid according to claim 1,
A package with a lid, wherein the lid is made of polypropylene resin. The lidded package according to claim 2,
A lidded package having a haze value of 30% or less. In the lidded package according to any one of claims 1 to 3,
A package with a lid, wherein a bottom of a convex portion formed on the lid has a curl shape. The lidded package according to any one of claims 1 to 4,
A package with a lid, wherein the container body and the lid are both made of polypropylene resin.

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