JP2021024608A - Packaging container - Google Patents

Abstract

To provide a packaging container capable of efficiently releasing steam.SOLUTION: There is provided a packaging container for closing a container body by a lid body, the packaging container comprises: a standing wall on a periphery of the container body; and a flange part which is continuous to an inclined wall surface being continuous to a top face of the lid body. By a standing part which fits to inside with respect to the standing wall, an internal fitting structure is achieved, and by a vertical groove provided on the standing part or the standing wall, and a plurality of lateral groove groups which are provided on a bent part of the lid body or a bent part of the container body and communicate with the vertical groove, a steam release part is formed, and the steam release part makes the container body communicate with an external part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a structure for safely discharging steam when a liquid such as juice, which is the content of a packaging container which is a resin sheet molded product, does not leak and is cooked in a microwave oven or the like. ..

In a sheet-molded packaging container for accommodating contents containing a liquid such as juice, the closing lid generally adopts an inner fitting structure so that the liquid does not leak to the outside. Recently, many of these containers are compatible with microwave ovens, but if the container body and lid are completely sealed by internal fitting, steam generated during cooking will eject steam from the container with strong pressure. Therefore, it is necessary to adopt a structure that allows steam to escape safely.

In order to solve these problems, inventions adopting a steam venting structure have been conventionally proposed.

Japanese Unexamined Patent Publication No. 2016-199285 JP-A-2009-28325

In Patent Document 1, in order to cope with an increase in internal pressure when the container is heated in a microwave oven, a steam vent groove portion is formed in a flat portion of the lid to cope with an increase in internal pressure. Further, in Patent Document 2, a recess is formed in a part of the upper surface of the lid, a valve formed by a notch for bleeding steam is provided in the recess, and the valve portion is covered with a label in an unused state. ..

However, in the configuration described in Patent Document 1, since the steam vent groove portion communicates with the container body and does not communicate with the external space, the internal pressure increases the internal pressure to some extent and then the internal pressure lifts the flat lid portion. The steam escapes. In other words, the internal pressure inside the container rises first, and steam is released only when it cannot withstand this. Therefore, if the fitting structure between the container body and the lid is strong, the internal pressure inside the container becomes high, and there is a danger that steam will suddenly escape due to the strong pressure. Further, in the configuration described in Patent Document 2, in order for the valve for removing steam to function, it is necessary to artificially remove the label before cooking.

The present invention solves such a conventional problem, and the container body and the lid are securely fitted to each other so that the contents do not leak carelessly, and the internal pressure of the container increases carelessly. It is an object of the present invention to provide a packaging container capable of releasing steam generated by cooking.

In a packaging container in which the container body of the present invention is closed by a lid in order to achieve the above-mentioned object, a flange portion continuous with a rising wall on the outer periphery of the container body and an inclined wall surface continuing to the top surface of the lid. It is assumed that the structure is internally fitted by a rising portion that rises from the top and fits inward with respect to the rising wall. Then, a steam vent is formed by a vertical groove provided in the rising portion and a plurality of horizontal groove groups provided in communication with the vertical groove, and this steam vent communicates the container body with the outside. Was used. In the normal state, the steam vent communicates the inside and the outside of the container, and the internal pressure is basically the same as the external pressure. Therefore, for example, when cooking in a microwave oven, the above gradually becomes external as the internal pressure rises. It will be released into the air and will not be accompanied by an abnormal increase in pressure. Further, since the groove communicating with the outside is composed of a plurality of horizontal groove groups, it is possible to avoid releasing steam with a strong pressure even when releasing the internal pressure. Further, if the structure is internally fitted, the airtightness of the container is high, so that the inside of the container becomes negative pressure when the lid is opened, which makes it difficult to open the lid. However, in the above configuration, the steam vent is always communicated with the outside. Therefore, the lid can be easily opened and closed without the need to provide a separate air vent.

In addition, by setting the depth of the horizontal groove group so as not to exceed the depth of the vertical groove and setting the total width of the horizontal groove group to be smaller than the width of the vertical groove, the pressure is increased when the steam is released to the outside. The above release can be dispersed and safe.

Further, when the lateral groove group is formed into a plurality of lattice-shaped grooves, the flow path has a bent form, and it is possible to effectively cope with the mixing of foreign matter from the outside. Furthermore, in a configuration in which two or more steam vents are evenly arranged on the outer periphery of the lid, and more specifically, two or more are arranged at point-symmetrical positions on the outer periphery of the lid, the steam can be released to the outside in a well-balanced manner. This makes it possible to prevent an accident in which the closed lid is opened due to a sudden rise in internal pressure.

According to the present invention, since the inside and the outside are communicated with each other even when the steam is evacuated and a horizontal groove group is formed following the vertical groove, it is possible to avoid the danger of steam being ejected to the outside due to a high internal pressure. .. Further, since the lateral groove group is formed by being bent as a whole, there is a high possibility that foreign matter will stay in the middle of the lateral groove group even when foreign matter is about to enter from the outside, and an effective foreign matter mixing prevention structure can be obtained.

The plan view of the lid body of the packaging container of this invention. Similarly, a cross-sectional view showing a state in which the lid is closed to the container body. The same, enlarged end view of the main part. The same, enlarged plan view of the main part. The same, enlarged sectional view of the main part. The same, enlarged sectional view of the main part. Top view showing another embodiment. FIG. 5 is a plan view showing still another embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing a lid 1 of a packaging container according to an embodiment of the present invention, and FIG. 2 is a steam vent provided at four outer circumferences of the lid 1. The number of steam vents 2 is not particularly limited, but if it is too small, steam will not be sufficiently released, but if it is too large, it will be an extra configuration. Reference numeral 3 denotes a tongue piece used when removing the lid 1 from the container body. The tongue piece 3 is preferably provided at a position different from the position of the steam vent 2. This is because if the tongue piece 3 and the steam vent 2 are provided at the same position, the tongue piece 3 gets wet due to the above, and there is a risk of slipping when the tongue piece 3 is picked. FIG. 2 is a cross-sectional view showing a place where the lid 1 is closed to the container body 4, and the lid 1 is closed to the container body 4 by internal fitting. As a configuration for that purpose, a rising wall 5 is provided on the outer peripheral portion of the container main body 4, an inclined wall surface 7 is formed on the lid 1 from the outer peripheral portion of the top surface 6, and a flange portion 8 is provided on the outer peripheral portion of the inclined wall surface 7. At the same time, the rising portion 9 is continuously formed corresponding to the rising wall 5 of the container body 4. Then, the rising wall 5 of the container body 4 is internally fitted by the rising portion 9 of the lid 1. The rising wall 5 of the container body 4 and the extended bent portions 10 and 11 of the rising portion 9 of the lid 1 are overlapped with each other when the lid 1 is closed, so that the lid 1 is predetermined. It functions as a positioning that allows the lid to be closed at the specified position. On the other hand, the rising wall 5 of the container body 4 is made to rise from the upper expanding portion 13 of the side wall 12 of the container body 4, and the position of the flange portion 8 when the lid 1 is closed is regulated. However, the configuration of the expansion portion 13 may be omitted. In the present embodiment, the material of the container body 4 is represented by an effervescent resin, but if the high temperature during cooking is not taken into consideration, the container body 4 is formed of a non-effervescent resin like the lid 1. May be good.

Next, FIG. 3 is an enlarged end view concretely showing the configuration of the steam vent 2 important for the present invention, and FIG. 4 is an enlarged plan view. The configuration for steam removal consists of a vertical groove 14 provided in the rising portion 9 of the lid body 1 and a plurality of horizontal groove groups 15 provided in the bent portion 11 continuous with the rising portion 9, and the vertical groove 14 and the horizontal groove. The group 15 communicates with each other, and the vertical groove 14 communicates with the inside of the container body 4. As a result, even when the lid 1 is closed to the container body 4, the inner space of the container body is communicated with the outside by the vertical groove 14 and the horizontal groove group 15. The vertical groove 14 has a concave shape when the lid 1 is fitted to the container body 4, and a space portion is formed. Similarly, the horizontal groove group 15 also has the bent portion 10 and the lid of the container body 4. It is a concave shape in which a space portion is formed when the bent portion 11 of the body 1 is superposed. In the present embodiment, the vertical groove 14 is one thick groove as shown in the cross-sectional view of FIG. 5, and the horizontal groove group 15 is a plurality of narrow grooves continuing from the vertical groove 14 as shown in the cross-sectional view of FIG. .. Further, the lateral groove group 15 is formed in a mesh shape or a grid shape. More specifically, as shown in the figure, the relationship between the width W of the vertical groove 14 and the width Wb of the horizontal groove group 15 is Wb <W, and the relationship between the depth H of the vertical groove 14 and the horizontal groove group Hb is Hb <=. It is H. Further, preferably, the relationship between the total width Ws of the lattice-shaped horizontal groove group 15 and the width W of the vertical groove is Ws> = W. By setting Ws> = W, the steam generated inside the container is not released at high pressure, but is stepped down by the lateral groove group 15 and released, so that the steam is prevented from being ejected. Can be done. The groove represented as the vertical groove 14 in the present embodiment is substantially formed on the outlet side in the lateral direction corresponding to the bent portion 11 of the lid body 1, but it is necessary in the present invention. Is that the side communicating with the container body 4 is formed in the vertical direction, and the vertical groove 14 also includes a portion in which the portion communicating with the horizontal groove group 15 is formed in the horizontal direction.

FIG. 7 is a modification of the steam venting of the present invention. In the form of the horizontal groove group 15 communicating with the vertical groove 14, the branch groove 16 of the horizontal groove group 15 communicates with the vertical groove 14 first, and the branch groove 16 communicates with the vertical groove 14. On the other hand, a plurality of branch groove groups 17 are connected so as to communicate with the outside. With this configuration, the steam discharged from the vertical groove 14 is discharged from the support groove group 17 at substantially equal pressure via the branch groove 16 that functions as a header. The relationship between the width and the depth of the vertical groove 14 and the horizontal groove group 15 is the same as that of the previous embodiment.

FIG. 8 is a further modification of the steam venting of the present invention, in which a plurality of horizontal groove groups 19 communicate with each other in a mesh pattern so as to communicate with the vertical groove 18 having a width wider than the vertical groove 14 in the previous embodiment. There is. The relationship between the width and the depth of the vertical groove 14 and the horizontal groove group 15 is different from that of the previous embodiment, and the total width Ws of the horizontal groove group is smaller than the width W of the vertical groove. That is, by making the width W of the flutes sufficiently wide, the ejection pressure is lowered.

In each of the above embodiments, the vertical grooves 14 and 18 are all described as one groove, but if the vertical grooves 14 and 18 are all connected to the container body 4, the vertical grooves may be composed of a plurality of, for example, two. is there.

In the above embodiment, in the first embodiment and the second embodiment, the horizontal groove group is described as a grid shape or a mesh shape, but when the internal pressure of the container body rises, the horizontal groove group is transmitted through the vertical groove. The shape of the lateral groove group is not limited to a lattice shape or a mesh shape unless the shape is such that when the steam is discharged to the outside, it shows high flow path resistance and flows backward. What is required is that the pressure applied from the vertical groove to the horizontal groove group is reduced by the horizontal groove group, and if this is satisfied, it is within the scope of the present invention. Further, in each of the embodiments described above, the lateral groove group constitutes a bent passage as a whole, and even if a foreign matter invades from the outside, the foreign matter is likely to stay somewhere in the bent passage. , It is possible to prevent accidents involving foreign matter.

In each of the above embodiments, the case where the steam vent is provided on the lid has been described, but a vertical groove for steam vent is provided on the rising wall corresponding to the inner peripheral portion of the container body, and the bent portion of the container body communicates with the vertical groove. It is also within the scope of the present invention to provide a plurality of lateral groove groups similar to those in the above embodiment.

1 Lid 2 Steam vent 4 Container body 5 Rising wall 8 Flange part of lid 9 Rising part of lid 10 Bending part of container body 11 Bending part of lid 14 Vertical groove 15 Horizontal groove group

Claims (6)

A packaging container in which the container body is closed by a lid, which rises from a flange portion continuous with a rising wall on the outer periphery of the container body and an inclined wall surface continuing to the top surface of the lid, and with respect to the rising wall. An inner fitting structure is formed by a rising portion that fits inside, and a vertical groove provided in the rising portion or the rising wall is provided in the bent portion of the lid or the bent portion of the container body in communication with the vertical groove. A packaging container characterized in that a steam vent is formed by a plurality of horizontal grooves, and the steam vent communicates the container body with the outside. The packaging container according to claim 1, wherein the depth of the horizontal groove group does not exceed the depth of the vertical groove. The packaging container according to claim 1 or 2, wherein the total width of the horizontal grooves is smaller than the width of the vertical grooves. The packaging container according to any one of claims 1 to 3, wherein the horizontal groove group is composed of a plurality of lattice-shaped grooves. The packaging container according to any one of claims 1 to 4, wherein two or more steam vents are evenly arranged on the outer peripheral portion of the lid or the inner peripheral portion of the container body. The packaging container according to claim 5, wherein the steam vent is arranged at two or more point-symmetrical positions on the outer peripheral portion of the lid or the inner peripheral portion of the container body.

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