JP3220615U - Packaging container lid - Google Patents

Abstract

Provided is a packaging container lid capable of suppressing contamination of foreign substances as much as possible and allowing vapor to escape while applying an appropriate internal pressure during heating.
In a lid that covers a packaging container body that is to be heated in a microwave oven with food stored inside, a concave surface is provided on the top surface, and a plurality of cuts 323 are provided on the concave surface. Convex ribs are provided at portions between the plurality of cuts. Instead of the convex rib, a concave rib may be provided. A rib may be provided in the vicinity of the end of the cut. Ribs may be provided between the cut extensions. While providing a recessed part in a top | upper surface and making the bottom part of a recessed part concave shape, you may provide a notch and a rib in a concave bottom part.
[Selection] Figure 1

Description

  The present invention relates to a lid for a food packaging container used for storing a lunch box or various cooked foods, and more specifically, has a mechanism for releasing steam generated when heated in a microwave oven to the outside. In addition, the present invention relates to a lid of a packaging container that can prevent contamination of foreign matters such as insects.

  At retail outlets such as supermarkets and convenience stores, lunch boxes and various cooked foods are packed and displayed in packaging containers.

  Such a packaging container includes a container main body configured to be able to store food, etc., a lid detachably attached to the opening of the container main body, and an opening of the container main body that contains the contents of the lid. The film packaging material which fixes a container main body and a cover body in the state attached to the part is provided.

  A packaging container that is film-wrapped after containing food or the like as described above is often heated using a microwave oven as it is film-wrapped.

  In a packaging container used for the above-mentioned purposes, water vapor generated when heated in a microwave oven is ensured so that the liquid juice of food contained in the container body does not leak outside. Therefore, it is required to release water vapor out of the container so that the container does not expand excessively or burst. Therefore, a valve is provided on the lid or a hole is provided to release water vapor to the outside.

  Patent Document 1 discloses a packaging container in which fitting of a corner portion is partially released by the pressure of water vapor generated inside the container when heated in a microwave oven and water vapor is released to the outside.

  Patent Document 2 discloses a packaging container in which an exhaust hole is formed in at least one of a flange of a container body or a flange of a lid.

Patent Document 3 discloses a packaging container capable of forming a valve by providing a notch in the lid of the packaging container to release steam.

Patent Document 4 discloses a packaging container in which an exhaust hole is provided in a lid by irradiating a laser beam.

  Patent Document 5 discloses a lid for a packaging container in which a concave surface recessed on the container body side is provided in the top plate portion, and a cut is provided in the concave surface.

JP 2001-97436 A JP 2007-276835 A Registered Utility Model No. 3138601 JP 2017-81599 A Registered Utility Model No. 3213110

  As described above, it is desirable that a container in which food or the like is packaged be provided with a means for releasing steam when heated.

  On the other hand, it is necessary to prevent foreign substances from entering from the means for releasing such steam.

  Moreover, if steam escapes with little resistance during heating and the internal pressure is too low, cooking may become poor.

  Accordingly, an object of the present invention is to provide a lid for a packaging container that can suppress the entry of foreign substances as much as possible and can release vapor while applying an appropriate internal pressure during heating.

The configuration of the present invention that solves the above problems is as follows.

  (1) The lid of the packaging container according to claim 1 is a lid that covers the packaging container body that is planned to be heated in a microwave oven in a state where food is contained inside the container body, and has a concave surface on the top surface. In addition, a plurality of cuts are provided on the concave surface, and convex ribs are provided at portions between the plurality of cuts.

  (2) The lid of the packaging container according to claim 2 is configured by providing a concave rib instead of the convex rib in the device according to claim 1.

  (3) The lid of the packaging container according to claim 3 is configured by providing a rib in the vicinity of the end of the cut in the device according to claim 1 or claim 2.

  (4) The lid of the packaging container according to claim 4 is configured by providing ribs on the extension of the cut in the device according to claim 1 or claim 2.

  (5) The lid of the packaging container according to claim 5 is a device according to any one of claims 1 to 4, wherein the top surface is provided with a recess composed of a wall and a concave bottom, and the recess The notch and rib were provided in the concave bottom part of the part.

  It will be outlined with reference to the drawings how the present invention configured as described above works to solve the problems.

  FIG. 1 shows a device according to claim 5. The operation of the present invention will be outlined with reference to FIG.

  The lid 320 of the packaging container according to the present invention is used by covering the container body 60 shown in FIG. 1 with food or the like not shown. By heating in the microwave oven in such a state, the steam generated inside the container main body 60 lifts the portion 323S between the cuts 323 and 323, and discharges the steam to the outside from the resulting gap.

  Thus, according to the present invention, it is possible to release steam to the outside. On the other hand, since the portion 323S is provided with the concave rib 322, the shape resistance is increased and the portion 323S is lifted. The drag will be great.

  That is, since the part 323S does not easily lift, a gap does not easily occur. In other words, it is possible to suppress contamination of insects and other foreign substances as much as possible.

  Furthermore, since the part 323S is not easily lifted, the internal pressure inside the container body 60 is increased, and for example, the effect that the meat juice is more likely to soak into the food also occurs.

  Moreover, when the internal pressure by steam falls, as a result of the site | part 323S falling and closing a gap | interval, a state with a high internal pressure can be maintained, As a result, the effect that cooking time can be shortened also arises.

  The above has outlined the invention described in claim 5 as an example, but each of the other inventions described in other claims has a plurality of cuts and ribs provided between the cuts or between the cuts. Thus, the same effects as those of the above-described invention of claim 5 can be obtained.

Explanatory drawing which shows the implementation state of the device of Claim 5 AA line sectional view in FIG. BB sectional view in FIG. The perspective view which shows other embodiment of the device of Claim 5 The perspective view which shows other embodiment of the device of Claim 5 CC sectional view in FIG. DD sectional view in FIG. The perspective view which shows other embodiment of the device of Claim 5 A perspective view of the device of claim 1 EE sectional view in FIG. A perspective view of the device of claim 2 FF sectional view in FIG. Cross-sectional view illustrating an embodiment of the present invention A perspective view of the device according to claim 3 A perspective view of the device of claim 4 The principal part enlarged view of the device of Claim 4

   Hereinafter, preferred embodiments of the components of the present invention will be outlined with reference to the drawings. In addition, embodiment of the component of this invention is not limited to the following embodiment at all, As long as it belongs to the technical scope of this invention, various forms can be taken. In the figure, U indicates the upper side and S indicates the lower side.

  The following outlines the device according to claim 5.

  The lid 320 of the packaging container according to claim 5 is used by being fitted into the opening 61 of the container body 60 as shown in FIG. The container main body 60 contains food and is cooked by microwave irradiation in a microwave oven with the lid 320 covered. In addition, as shown in FIG. 13, the lid 320 is sold as a shrink pack with the film 40 in a state in which the lid 320 is fitted to the container body 60, and is often heated in the range as it is.

  The lid 320 is illustrated in a circular shape when viewed from above, but the shape thereof is appropriate according to the opening of the container body 60, and may be a polygonal shape, an elliptical shape, or the like.

  The lid 320 is formed of a synthetic resin sheet that can be mass-produced and manufactured inexpensively and easily. Specifically, thermoplastic resin sheets such as polyethylene, polypropylene, polystyrene, and polyethylene terephthalate (PET resin) can be used.

  The usage, shape, and material of the lid 320 described above are the same in the device according to any one of claims 1 to 4.

  As shown in FIGS. 1, 2, and 3, the top surface 11 of the lid 320 has a wall portion 324 b bent at a substantially right angle toward the container body 60, that is, downward, and a substantially right angle at the lower end of the wall portion 324 b. A recessed portion 324 having a bottom portion 324a bent in the direction is provided.

  The bottom 324a of the recess 324 is formed in a concave shape, and a plurality of cuts 323... Are provided in the bottom 324a. A concave rib 322 protruding downward is provided at a portion 323S between the cuts 323.

  The depression 324 is provided in order to avoid excessive contact between the notch 323 and the film of the finger or shrink pack, that is, to suppress the vicinity of the notch 323 from being pushed by the finger or the film and generating a gap. It is.

  The fitting between the container body 60 and the lid 320 shown in FIG. 13 is a form called inner fitting, and the outer peripheral part 13 of the lid 320 is fitted into the opening 61 of the container body 60. Of course, in addition to the illustrated inner fitting, the fitting form can be an outer fitting. For example, it is the form which the edge part of a lid | cover covers from the outer side with respect to the opening part of a container main body. This fitting form is the same in the device according to any one of claims 1 to 4.

  As shown in FIG. 4, two or more concave ribs 322 may be provided.

  5 to 8 show a lid 320 provided with a convex rib 321. A convex rib 321 protruding upward is provided on the bottom 324 a of the recess 324. The number of the convex ribs 321 may be one as shown in FIGS. 5 and 6, or may be plural as shown in FIG.

  3. The following is an outline of the device according to claim 1.

  9 and 10 show a lid 100 for a packaging container according to claim 1.

  In the lid 100 according to claim 1, the top surface 11 is provided with a concave surface 101 curved toward the container body 60, that is, downward. Here, the concave surface refers to a surface curved in a curved shape directly from the top surface, while the recess has a side wall, and does not have a side wall.

  The concave surface 101 is provided with a plurality of cuts 102... And a convex rib 103 protruding upward is provided at a portion 102 S between the plurality of cuts 102. Although the number of the convex ribs 103 is one in the drawing, it is not limited to this, and a plurality of ribs 103 may be provided.

  4. The following outlines the device according to claim 2.

  11 and 12 show a packaging container lid 200 according to claim 2.

  In the lid 200 according to claim 2, the top surface 11 is provided with a concave surface 201 curved toward the container body 60, that is, downward. The concave surface 201 is provided with a plurality of cuts 202... And a concave rib 203 protruding downward is provided at a portion 202 S between the plurality of cuts 202. Although the number of the concave ribs 203 is one in the drawing, it is not limited to this, and a plurality may be provided.

  V. The following is an outline of the device according to claim 3.

  FIG. 14 shows a lid 400 for a packaging container according to claim 3.

  In the lid 400 according to the third aspect, the rib 401 is provided in the vicinity of the end of the notch 402. Although two ribs 401 are provided in the drawing, it is not limited to this, and may be one or three or more. Moreover, although the rib 401 is a convex rib protruding upward in the drawing, it is not limited to this, and may be a concave rib protruding downward.

  6. The following is an outline of the device according to claim 4.

  FIG. 15 shows a lid 500 for a packaging container according to claim 4, and FIG. 16 is an enlarged view of the vicinity of the notches and ribs.

  In the lid 500 according to the fourth aspect, the rib 501 is provided on the extension of the notch 502. Here, the space between the extension of the notch 502 means a space V between the virtual line X and the virtual line X extending in the length direction from the notch 502 as shown in FIG.

  Further, although two ribs 501 are provided in the drawing, it is not limited to this and may be one or three or more. Moreover, although the rib 501 is a convex rib protruding upward in the drawing, it is not limited to this, and may be a concave rib protruding downward.

100 ···································································································································· A part 203 between the convex ribs 320, a lid 321 of the packaging container, a convex rib 322, a concave rib 323, a cut 323S, a part 324 between the cuts, a concave part 324a, a bottom part 400, Packaging container lid 401, rib 402, cut 500, packaging container cover 501, rib 502, cutting

Claims (5)

In a state in which food is contained inside the container body, a lid that covers the packaging container body that is scheduled to be heated in a microwave oven,
Having a concave surface on the top,
Providing a plurality of cuts on the concave surface and providing a convex rib at a portion between the plurality of cuts;
A packaging container lid characterized by the above.   The lid of the packaging container according to claim 1, wherein a concave rib is provided instead of the convex rib.   The lid of the packaging container according to claim 1, wherein a rib is provided in the vicinity of the end of the cut.   The lid of the packaging container according to claim 1 or 2, wherein a rib is provided between the extended cuts.   The lid of the packaging container according to any one of claims 1 to 4, wherein a concave portion comprising a wall portion and a concave bottom portion is provided on the top surface, and a notch and a rib are provided on the concave bottom portion of the concave portion.

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