JP7054175B2 - Inner fitting container for packaging - Google Patents

Description

The present invention relates to a structure in which the lid of a packaging container, which is a molded resin sheet, and the container body are closed by internal fitting, and the container body and the lid can be tightly engaged without being easily disengaged. It is about the technology improved so that it can be done.

As for the closed structure of the packaging container which is a resin sheet molded product, in addition to the outer fitting type in which the fitting portion between the lid and the container body is provided on the outer edge of the container body, the fitting portion is provided from the outer edge of the container body. There is also an inner fitting type provided inside (Patent Document 1).

In general, the inner fitting type packaging container is said to have better sealing performance than the outer fitting type, and tends to be adopted as a packaging container for foods having a lot of juice.

Japanese Patent Application Laid-Open No. 2003-63573

In the packaging container of Patent Document 1, the fitting portion of the container body has an inverted tapered wall surface that is inclined inward from the outer edge portion of the recess and is raised to an appropriate height, and the outer edge portion of the lid body. The inverted tapered folded-back portion formed in the above is internally fitted into the fitting portion of the container body to close the lid, but the folded-back portion of the lid does not reach the depth of the recess of the container body, which is sufficient. There was a risk that the lid would come off with a slight impact because the fitting strength could not be obtained.

Further, in the packaging container of Patent Document 1, since the inner edge of the recess of the container body forms a gap with the lid and is open so as to communicate with the storage portion, the container can be opened even after the lid is closed. When tilted, the juice in the storage portion may enter the recess through the gap, causing juice leakage from the fitting portion.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent the lid from being easily disengaged by strengthening the internal fitting between the container body and the lid, and to prevent the lid from easily coming off. It is an object of the present invention to provide an inner fitting container for packaging in which juice leakage is less likely to occur.

In order to achieve the above-mentioned object, in the present invention, it is a sheet-molded inner fitting container for packaging, which is composed of a container body and a lid, and the container body is a bottom surface, a wall surface rising from the periphery of the bottom surface, and the same. It has a lid fitting flange portion that faces outward with respect to the wall surface, and a container-side reverse tapered surface that extends upward from the lid fitting flange portion, and the lid body has a top plate and a top plate. A first lid wall that is continuous downward from the peripheral edge of the top plate, a lid flange portion that expands outward from the lower edge portion of the lid wall, and a lid flange portion that is continuous downward from the lid flange portion. It has a second lid wall and a lid-side reverse taper surface provided upward from the second lid wall via an extension portion, and the depth of the lid-side reverse taper surface is set to the container-side reverse taper . The means of making it correspond to the depth of the surface is used.

Corresponding in the present invention means that the depths are matched, and the depth of the reverse taper surface of the lid is slightly shallower than the depth of the reverse taper surface of the container body, but the reverse taper surface of the lid engages deeply. This includes the range in which a reliable closure is achieved. In the present invention, since the reverse taper surface is formed on both the container body and the lid body, the cover body side reverse taper surface provided on the lid body engages with the container side reverse taper surface, and is surely engaged. Achieve the combination.

On the other hand, the container-side reverse taper surface of the container body can be tilted within a range of 30 to 90 degrees with respect to the vertical, so that more reliable engagement can be realized.

Regarding the dimensions, if the depth of the reverse tapered surface on the container side and the lid side is set to 0.5 to 4.0 mm, the engagement between the container body and the lid is reliable, and at the same time, even when the lid is opened. The lid can be opened without using a strong force. Further, when the depth of the reverse taper surface on the lid side is sufficient, the depth of the reverse taper surface on the lid side may be relatively shallower than the depth of the reverse taper surface on the container side.

It is preferable that the second lid wall in the lid is formed so as to rise toward the top plate from the extension portion located between the second lid wall and the reverse tapered surface on the lid side. According to this means, the compressive strength of the lid can be increased when a load is applied to the top plate from above.

It is preferable that at least a part of the extension portion of the lid body overlaps with the lid fitting flange portion of the container body. According to this means, the juice of food or the like contained in the product can be blocked in front of the inverted tapered surface by the overlapping portion.

Further, the lid has a corner portion (X1) on the lower surface side where the second lid wall and the extension portion are connected, and the container body is on the upper surface side where the lid fitting flange portion and the wall surface are connected. It has a corner portion (X2), and the upper surface side corner portion (X2) in the container body has a protruding width (L1) more than the lower surface side corner portion (X1) in the lid body and protrudes inward of the container. The protrusion width (L1) is set to be smaller than either the upper surface width (L2) or the lower surface width (L3) of the lid flange portion of the lid. According to this means, it is possible to prevent the contained matter and its juice from adhering to the region of the reverse tapered surface on the lid side. In the present invention, the "width" (including L4 described later) means the length of each part in the horizontal direction.

Further, it is preferable to set the width (L4) of the extension portion of the lid body to be larger than either the upper surface width (L2) or the lower surface width (L3) of the lid body flange portion of the lid body. According to this means, the extension portion having a sufficient width (L4) increases the distance from the second wall of the lid to the reverse tapered surface on the lid side, and the inclusion or the inclusion is provided in the region of the reverse tapered surface on the lid side. It is possible to prevent the juice from invading.

Furthermore, it is preferable that the extension portion of the lid has a downward slope from the reverse tapered surface on the lid side toward the second lid wall. According to this means, it becomes difficult for the contents and its juice to invade the area of the extension portion of the lid, and even if a small amount of juice or the like invades, it is returned to the inside of the container along the downward gradient of the extension portion. Is done.

According to the present invention, it is possible to prevent the lid from easily coming off by strengthening the fitting between the container body and the lid.

Further, in a packaging container having an inner fitting structure, which is said to have a higher sealing property than an outer fitting structure, it is possible to more reliably prevent the contained matter and its juice from leaking, and these are reverse tapered surfaces. It is also possible to prevent the container from adhering to or invading the area of the container, and to prevent the visibility of the inside of the container body through the lid from being obstructed.

The plan view which shows the disassembled state of the inner fitting container for packaging which concerns on 1st Embodiment of this invention. Similarly, a plan view showing a closed (fitted) state. Similarly, an enlarged cross-sectional view taken along the line AA'in FIG. Enlarged sectional view of a main part of the inner fitting container for packaging according to the second embodiment of the present invention. Enlarged sectional view of a main part of the inner fitting container for packaging according to the third embodiment of the present invention. Enlarged view of area B in FIG. Top view showing the disassembled state of the inner fitting container for packaging which concerns on the modification of 1st Embodiment An exploded perspective view of an inner fitting container for packaging showing another application example of the present invention. Top view showing the disassembled state of the inner fitting container for packaging which shows still another application example of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 3 show, as the first embodiment of the present invention, a bowl-shaped inner fitting container for packaging having a circular plan view with respect to a sheet-molded inner fitting container for packaging composed of a container body 1 and a lid 2. Shows. FIG. 1 shows a state in which the container body 1 and the lid 2 are separated, FIG. 2 shows a state in which the lid 2 is fitted to the container body 1, and FIG. 3 is an enlarged cross section taken along the line AA'in FIG. The figure is shown.

The basic configuration of the container body 1 includes a bottom surface 1a, a wall surface 1b rising from the periphery of the bottom surface 1a, and a lid fitting flange portion 1c facing outward with respect to the wall surface 1b. Further, the basic configuration of the lid 2 is the top plate 2a, the first lid wall 2b continuous downward from the peripheral edge of the top plate 2a, and the lower edge portion of the lid wall 2b toward the outside. It has a lid flange portion 2c that expands. Further, the lid body 2 is provided with a second lid body wall 2d that is continuous downward from the lid body flange portion 2c. The final outer edge portion 1d of the container body 1 is set to be one size larger than the final outer edge portion 2e of the lid body 2, while a knob portion 3 is provided at one position of the final outer edge portion 2e of the lid body 2. ..

Then, a recess that fits into each other between the lid fitting flange portion 1c of the container body 1 and the final outer edge portion 1d and between the second lid wall 2d and the final outer edge portion 2e of the lid body 2. The fitting portions 1e and 2f of the strips are provided over the entire circumference to form an inner fitting container for packaging that employs an inner fitting structure as the fitting structure. Of these fitting portions 1e and 2f, the container body Regarding No. 1, a strong fitting region, which is a characteristic configuration of the present invention, is provided in one place of the B region surrounded by the chain line circle in FIG. 1, and the lid 2 also has a strong fitting region corresponding to the B part. Is provided. That is, in the present embodiment, in the inner fitting container for packaging in which the container body 1 and the lid 2 are internally fitted over the entire circumference, a part (one place) thereof is used as a strong inner fitting region.

As shown in FIG. 3, the specific structure of this strong inner fitting region has, as shown in FIG. 3, the container body 1 has a container-side reverse tapered surface 1f provided by extending upward from the lid fitting flange portion 1c. The lid 2 has a lid-side reverse tapered surface 2h provided upward from the second lid wall 2d via an extension 2g having a shape corresponding to the lid fitting flange portion 1c of the container body 1. The depth of the lid-side reverse taper surface 2h corresponds to the depth of the container-side reverse taper surface 1f. The container-side reverse taper surface 1f and the lid-side reverse taper surface 2h are inclined inward of the container, and are connected to the final outer edge portions 1d and 2e via folded portions 1g and 2i having an appropriate shape.

Here, the depth D of the container side reverse taper surface 1f and the lid side reverse taper surface 2h is set to 0.5 to 4.0 mm, and the respective reverse taper surfaces 1f and 2h are 30 to 90 with respect to the vertical direction. Set to degree. Here, 90 degrees corresponds to folding back in the horizontal direction, but it should not be completely overlapped with the lid fitting flange portion 1c and the extension portion 2g, but should be in a state where there is a gap. Is preferable. Therefore, it is less than 90 degrees to be exact. In this way, in order to deepen the undercut, a slide core is used for the mold used for sheet molding. If the depth D is shallower than 0.5 mm, the lid is likely to come off as in the conventional problem, while if it is deeper than 4.0 mm, extra force needs to be applied when opening the lid. Then, the depth D is set in this way. Regarding the depth D, the container side reverse taper surface 1f and the lid side reverse taper surface 2h may be completely matched, but by making the depth of the lid side reverse taper surface 2h sufficiently deep, the container side reverse taper surface 2h may be completely matched. It may be relatively shorter in extension length than surface 1f, i.e. somewhat shallower. Further, regarding the taper angle, when the taper angle is smaller than 30 degrees, the reverse tapered surface 1f on the container side becomes too high in order to deepen the depth D, and the stackability of the container body 1 deteriorates, so that the container body 1 is transported during transportation. The number of items in the box cannot be increased. Therefore, the angle is set to an angle exceeding 30 degrees.

On the other hand, in the present embodiment, as the wall surface configuration of the lid 2, a second lid wall 2d is provided between the lid flange portion 2c and the lid side reverse tapered surface 2h in addition to the first lid wall 2b. The second lid wall 2d is provided so as to rise from the extension portion 2g toward the top plate 2a as in the case of the first wall wall 2b, instead of rising upward from the lid flange portion 2c. Is formed in. As a result, the compressive strength of the lid 2 is increased, and a concave groove is formed between the extension portion 2g and the lid side reverse tapered surface 2h, so that the strength of this portion can also be increased. Therefore, the lid-side reverse taper surface 2h can be strongly fitted into the container-side reverse taper surface 1f of the container body 1.

Further, in this embodiment, when the lid 2 is attached to the container body 1, the extension portion 2g of the lid 2 is configured to overlap the lid fitting flange portion 1c of the container body 1, so that the container body is configured. The juice and other liquids such as foods contained in 1 can be blocked by the overlapping portion to prevent the juice from leaking to the outside of the container. The overlap can be maximized by accurately matching the shapes of the extension portion 2g and the lid fitting flange portion 1c, but it may be at least partially overlapped.

Further, in the present embodiment, when the lid 2 is attached to the container body 1, the second lid wall 2d of the lid 2 is configured to be located outside the wall surface 1b of the container body 1. .. That is, the lid 2 has a corner portion (X1) on the lower surface side where the second lid wall 2d and the extension portion 2g are connected, and the container body 1 has a lid fitting flange portion 1c and a wall surface 1b. The upper surface side corner portion (X2) of the container body 1 has a corner portion (X2) on the upper surface side to be connected, and the upper surface side corner portion (X2) of the container body 1 is located inside the container by the protrusion width (L1) from the lower surface side corner portion (X1) of the lid body 2. It has a structure that pushes out. Since the lower surface side corner portion (X1) of the lid body 2 has a rounded shape, for convenience of explanation, it is shown as a virtual point where the lower surfaces of the second lid body wall 2d and the extension portion 2g intersect. In the enlarged view shown by the chain line circle in the figure, the state in which the lid 2 is not completely fitted but is slightly raised from the container body 1 is shown. The protruding width (L1) is set to be smaller than either the upper surface width (L2) or the lower surface width (L3) of the lid flange portion 2c of the lid 2. Therefore, with this configuration, it is possible to prevent the contained material and its juice from adhering to the region of the lid-side reverse tapered surface 2h.

As described above, in the inner fitting container for packaging of the present embodiment, the fitting between the container body 1 and the lid 2 is strengthened in a part of the inner fitting region, so that the lid 2 is prevented from being easily disengaged. be able to. In addition, in the inner fitting container for packaging, which is said to have a higher sealing property than the outer fitting structure, it is possible to more reliably prevent the contained matter and its juice from leaking, and these are used. It is also possible to prevent the container body 1 from being adhered to or intruding into the region of the inverted tapered surface, and to prevent the visibility of the inside of the container body 1 through the lid 2 from being hindered. Furthermore, since the extension portion 2g of the lid 2 has a downward slope from the lid side reverse tapered surface 2h toward the second lid wall 2d, it is difficult for the container or its juice to invade the region of the extension 2g. Therefore, even if a small amount of juice or the like invades, it is returned to the inside of the container along the downward gradient of the extension portion 2 g.

FIG. 4 shows a second embodiment of the present invention. By setting the horizontal length of the lid flange portion 2c to be small in the lid 2, the lid 2 is opposed to the above embodiment. The lower surface side corner portion (X1) is configured to protrude toward the inside of the container from the upper surface side corner portion (X2) of the container body 1. Also in this case, the protrusion width (L1) is set to be smaller than either the upper surface width (L2) or the lower surface width (L3) of the lid flange portion 2c. Therefore, in this second embodiment, a part of the extension portion 2g in the lid body 2 becomes an eaves, and more reliably prevents the contained matter and its juice from adhering to the region of the lid side reverse tapered surface 2h. can do.

Further, since the width (L4) of the extension portion 2g of the lid body 2 is set to be larger than either the upper surface width (L2) or the lower surface width (L3) of the lid body flange portion 2c, a sufficient width (L4) is set. The extension portion of the lid 2 increases the distance from the second wall wall 2d of the lid 2 to the reverse tapered surface 2h on the lid side, and more reliably invades the region of the reverse tapered surface 2h on the lid side. Can be prevented from doing so.

On the other hand, the lower surface side corner portion (X1) of the lid body 2 and the upper surface side corner portion (X2) of the container body 1 can be completely matched as in the third embodiment shown in FIG. Also in this case, it is possible to prevent the contained matter and its juice from invading the fitting region while maintaining the strong fitting of the reverse tapered surfaces 1f and 2h.

In the above embodiment, as shown in FIG. 6, the B region of FIG. 1 is enlarged in a part (one place) of the conventionally known inner fitting portion 1e that appears in a circular shape in a plan view in the container body 1. Since a strong fitting portion corresponding to the lid reverse tapered surface 2h of the lid 2 is provided, when attaching the lid 2, normally, the lid 2 is internally fitted to the container body 1 and then the lid 2 is attached. By rotating, the regions of the opposite tapered surfaces of both can be matched.

On the other hand, in order to keep the lid 2 closed more firmly, as shown in FIG. 7, it is possible to provide two or more configurations of the B region in FIG. 1 (six in the drawing). It is not excluded that all of the inner fitting portions have a strong fitting structure due to the reverse tapered surface of the B region.

However, since there is a strong fitting area even in a part, for a person with a weak hand such as an elderly person, the work of releasing the strong fitting and opening the lid 2 cannot be smoothly performed. Is expected.

Therefore, in the present invention, the lid 2 is provided with the knob portion 3 corresponding to the strong fitting region (region B in FIG. 1) (see FIGS. 1, 2, and 7). As a result, if the lid opening work is performed by holding the knob portion 2, the fitting of the strong fitting region is released, so that the lid opening work of the lid body 2 can be smoothly performed even by an elderly person or the like. can. In other words, since the grip portion 3 indicates the position of the strong fitting region, the user can perform the lid opening operation without worrying about the position of the particularly strong fitting region. Further, if a sticker or cellophane tape is attached to the knob portion 3, unauthorized opening can be prevented.

The outer shape of the inner fitting container for packaging in the present invention is widely applied to a circular shape, an elliptical shape, an oval shape, a rectangular shape, a hexagonal shape, etc., and as another application example, specifically, a cup-shaped container body is provided. Examples include an inner fitting container for wrapping for soup (FIG. 8), and an inner fitting container for wrapping for lunch (FIG. 9) in which both the container body and the lid are relatively flat and square. As described above, the present invention has a strong internal fitting structure due to the above-mentioned inverted tapered surface, so that it can be suitably used for soups in which juice leakage is a problem and containers with a large amount of juice. It does not limit the contents to be contained, and can be widely applied to the conventional contents. Further, the lid opening work can be smoothly performed by providing at least a knob portion on the lid body corresponding to the region where the fitting strength is increased.

1 Container body 1a Bottom surface 1b Wall surface 1c Closure fitting flange 1d Final outer edge 1e Fitting part 1f Container side reverse tapered surface 1g Folded part 2 Cover 2a Top plate 2b First lid wall 2c Cover flange 2d 2nd lid wall 2e Final outer edge 2f Fitting part 2g Extension 2h Lid side reverse tapered surface 2i Folded part 3 Knob part

Claims (3)

A sheet-molded inner fitting container for packaging consisting of a container body and a lid.
The container body is
With the bottom
The wall that rises from around this bottom and
The flange for fitting the lid facing outward with respect to this wall surface,
It has a container-side reverse taper surface that extends upward from the lid fitting flange portion and is provided.
The lid is
Top plate and
The first lid wall that continues downward from the periphery of this top plate,
The lid flange that expands outward from the lower edge of the lid wall,
A second lid wall that is continuous downward from the lid flange portion,
It has a lid-side reverse taper surface provided upward from the second lid wall via an extension portion.
The depth of the reverse taper surface on the lid side corresponds to the depth of the reverse taper surface on the container side .
The second lid wall is
It is formed so as to rise toward the top plate from the extension portion located between the reverse tapered surface on the lid side.
The extension is
At least a part of the container body overlaps with the lid fitting flange portion ,
The lid is
A corner portion (X1) is provided on the lower surface side where the second lid wall and the extension portion are connected.
The container body is
A corner portion (X2) is provided on the upper surface side where the lid fitting flange portion and the wall surface are connected.
The corner portion (X2) of the container body is
It has a protrusion width (L1) more than the corner portion (X1) of the lid body and protrudes toward the inside of the container.
The protrusion width (L1) is
It is smaller than either the upper surface width (L2) or the lower surface width (L3) of the lid flange portion of the lid.
An inner fitting container for packaging, characterized by that. The width (L4) of the extension of the lid is
It is larger than either the upper surface width (L2) or the lower surface width (L3) of the lid flange portion of the lid.
The inner fitting container for packaging according to claim 1 . The extension of the lid is
There is a downward slope from the reverse taper surface on the lid side toward the second lid wall.
The inner fitting container for packaging according to claim 1 or 2 .

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