JP2007131322A - Aluminum foil molded container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aluminum foil molded container having a hemmed rising rim on a flange, the container which is inexpensive, suppresses bulkiness in stacking the containers, and facilitates handling of the containers by an automatic machine. <P>SOLUTION: The rising rim 140 of the container 100 consists of a first vertical portion 141, a taper portion 142, a second vertical portion 143, and a hemmed portion 144 which are formed in an increasing order from the periphery of the flange 130. When the container 100 are stacked, the taper portions 142 ease the interference of the rim 140 at the lower tier with that at the upper tier to suppress the bulkiness of the containers 100, thus facilitates handling of the containers 100 by the automatic machine. The second vertical portion 143 and the hemmed portions 144 overlapping with each other, which give difficulty in taper molding, are formed perpendicular to the flange 130, which enables stable caulking molding of the vertical portion 143 and the hemmed portions 144. The first vertical portion 141 supports vertical load when the container 100 is subjected to caulking molding, thus further stabilizing the molding process. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an aluminum foil molded container in which a rising rim is provided on the peripheral edge of a flange and an upper edge of the rising rim is trimmed.

  Conventionally, an aluminum foil molded container having a rising rim provided on the periphery of the flange is commercially available. Such a container is filled with contents such as cake, pie, etc., put a lid on the flange, and then squeeze the rising rim toward the periphery of the lid to hold the lid between the rising rim and the flange. And sealed for use.

  An example of such a conventional aluminum foil molding container is shown in FIGS. As shown in the figure, this aluminum foil molded container 200 includes a circular bottom wall 210, a peripheral wall 220 that rises from the periphery of the bottom wall 210 and tapers toward the open end, and a flange that projects horizontally from the upper edge of the peripheral wall 220. 230 and a rising rim 240 that rises from the periphery of the flange 230.

  More specifically, as shown in FIG. 4B, the rising rim 240 includes a vertical portion 241 that rises vertically from the periphery of the flange 230 and an edge portion 242 that is folded back from the upper edge of the vertical portion 241. The reason for this edging treatment is to reinforce the rim of the container and prevent the hand from touching the cut surface of the aluminum foil.

The container 200 that has been widely used conventionally has the following drawbacks due to the rising rim 240 rising vertically from the periphery of the flange 230.
That is, as shown in FIG. 5, when stacking a plurality vertically (stacking), the vertically rising rims 240 vertically raised interfere with each other and become bulky. High and wasteful. Similarly, since stacking is not accurately performed due to interference between the rising rims 240, the stacking is unstable, and the handling by the automatic machine is hindered.

  On the other hand, as described in Patent Document 1, the present inventor is concerned with an aluminum foil molded container having a square bottom wall or the like, in which a rising rim composed of a side portion and a corner portion is provided at the periphery of the flange. The technique which makes a taper shape which spreads a part toward an open end from a flange periphery is disclosed previously.

This technique is directly applied to the container 200 in which the rising rim 240 shown in FIG. 4 is trimmed, and the entire rising rim 240 is formed into a tapered shape, thereby preventing the interference between the rising rims 240 in the stacking state described above. It is theoretically possible to suppress the problem of increasing the bulk and to improve the convenience of handling in an automatic machine at the same time.
Japanese Utility Model Publication No. 5-44815

However, in actual manufacturing, if it is attempted to mold the edge part and the edge part and the part that is continuously opposed to the edge part in a taper shape, the molding pressure at the time of forming the edge part increases and decreases. It is often crushed in the direction or bent, and it is difficult to perform stable and accurate molding.
Then, due to the variation in the shape of the tapered portion, there is a risk that the instability of the stacking state may be spurred.

  On the other hand, if a special apparatus in which the molding pressure or the like is adjusted so that the above-described portion can be stably caulked and formed, the manufacturing cost of the container increases.

  Therefore, the problem to be solved by the present invention is an aluminum foil molded container provided with a rising rim that rises from the peripheral edge of the flange, and the upper edge of the rising rim is folded and subjected to the edging process. While paying attention to the stable formability of the overlapping parts of the rising rims that face each other continuously, handle it with an automatic machine at a low cost, suppressing the increase in bulk in the stacking state and the cost of packing, transportation and storage To make it easier.

  In order to solve the above-described problems, the present invention provides an aluminum foil molded container having a rising rim that rises from the peripheral edge of the flange, and has an upper edge of the rising rim folded back to form an edge portion. The taper portion that widens toward the top and the portion that continuously faces the edge portion of the rising rim is a single vertical portion that is perpendicular to the flange.

  Thus, if at least a part of the portion that does not overlap with the edge portion of the rising rim is formed in a tapered shape, interference between the upper and lower rising rims can be suppressed when the containers are overlapped. Therefore, an increase in bulk can be suppressed as compared with a case where the entire rising rim is vertical. Moreover, since the stacking state is stabilized, handling by an automatic machine becomes easy.

  Then, by forming a vertical portion where the edge portion and the rising rim that continuously faces the edge portion, which are difficult to be formed into a tapered shape, are formed vertically, it is possible to make this portion stable and inexpensive.

  In the above case, if the part directly above the peripheral edge of the flange of the rising rim is another vertical part that rises perpendicular to the flange, this other vertical part supports the load from above and below during container molding. This makes it possible to form a more stable container.

As for the dimensional relationship, the width (E) of the edge portion and the width (V ₁ ) of the other vertical portion are formed so as to satisfy the relationship of 1 × E ≦ V ₁ ≦ 1.8 × E, and the edge portion If the width (E) and the width (V ₂ ) of one vertical portion are formed so as to satisfy the relationship of 1 × E ≦ V ₂ ≦ 1.5 × E, particularly stable molding becomes possible.
Similarly, the width (T) of the tapered portion and the width (R) of the entire rising rim may be formed so as to satisfy the relationship of 0.2 × R ≦ T ≦ 0.5 × R. In addition, the width | variety in this application means the length in a perpendicular direction with respect to a flange.

  In addition, if the inclination is too steep, it is difficult to form the taper portion. On the other hand, if the inclination is too loose, a significant improvement in interference between the rising rims of the upper and lower containers in the stacking state cannot be expected. Therefore, when the angle between the taper portion and the perpendicular to the flange is α, it is appropriate that 5 ° ≦ α ≦ 20 °, and more preferably 10 ° ≦ α ≦ 15 °. Is appropriate.

  The container according to the present invention has a tapered rim and at least a part thereof is tapered. Therefore, when stacking, the bulk is suppressed to a low level, and the packing, transportation, and storage costs are reduced, and handling by an automatic machine is easy. It has the effect of becoming.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 (a) and 1 (b), an aluminum foil molded container 100 according to the embodiment includes a circular bottom wall 110, a peripheral wall 120 that rises from the periphery of the bottom wall 110 toward the opening, and expands in a tapered shape, and a peripheral wall 120 comprises a flange 130 that projects horizontally from the upper edge, and a rising rim 140 that rises from the periphery of the flange 130.

  More specifically, as shown in FIG. 1B, the rising rim 140 extends in a taper shape from the upper edge of the first vertical portion 141 toward the open end, and the first vertical portion 141 rising vertically from the periphery of the flange 130. However, the taper portion 142 rises, the second vertical portion 143 rises vertically from the upper edge of the taper portion 142, and the edge portion 144 that folds down and hangs down from the upper edge of the second vertical portion 143.

  The aluminum foil molded container 100 is molded by press die molding. However, since the portion where the rim portion 144 and the opposing second vertical portion 143 overlap is vertical, it can sufficiently withstand the load during rim molding. It has a structure and does not collapse or bend in the vertical direction. In particular, as in the case of the container 100, the presence of the first vertical portion 141 provides a structure that is more resistant to loads from above and below, and thus enables more accurate and uniform molding.

  As shown in FIG. 2, when the plurality of containers 100 are stacked one above the other, since the rising rim 140 is provided with the tapered portion 142 as described above, interference between the rising rims 140 can be suppressed, and the conventional structure shown in FIG. As is obvious from the case of the container 200, the bulk in the stacking state is significantly reduced. In addition, since the upper and lower containers 100 fit correctly, stable stacking is possible, and it is difficult for handling by an automatic machine to occur.

  The degree of inclination of the tapered portion 142 is adjusted in consideration of both the ease of edge forming and the improvement of the stacking state. As shown in FIG. When the angle formed with the vertical line is α, it is formed so that 5 ° ≦ α ≦ 20 °.

For the same reason, the mutual dimensional relationship between the respective portions 141, 142, 143, and 144 of the rising rim 140 is adjusted. As shown in FIG. When the width of one vertical portion 141 is V ₁ , the width of the tapered portion 142 is T, the width of the second vertical portion 143 is V ₂ , and the width of the edge portion 144 is E, 1 × E ≦ V ₁ ≦ 1 .8 × E and 1 × E ≦ V ₂ ≦ 1.5 × E and 0.2 × R ≦ T ≦ 0.5 × R.

(A) is a perspective view of the aluminum foil molding container of embodiment, (b) is the longitudinal cross-sectional view Front view of stacking aluminum foil molded container of embodiment (A) is a figure which shows the inclination angle of the taper part of a rising rim, (b) is a figure which shows the dimensional relationship of each site | part of a rising rim. (A) is a perspective view which shows an example of the conventional aluminum foil shaping | molding container, (b) is the longitudinal cross-sectional view. Front view of stacking conventional aluminum foil molded containers

Explanation of symbols

100 Aluminum Foil Molding Container 110 According to Embodiment 110 Bottom Wall 120 Perimeter Wall 130 Flange 140 Standing Rim 141 First Vertical Portion 142 Tapered Portion 143 Second Vertical Portion 144 Edged Portion 200 Conventional Aluminum Foil Molding Container 210 Bottom Wall 220 Perimeter Wall 230 Flange 240 Rising rim 241 Vertical portion 242 Edge R R Overall width of rising rim V ₁ Width of first vertical portion T Taper width V ₂ Width of second vertical portion E Edge width α Vertical to taper and flange Angle with line

Claims (6)

In an aluminum foil molded container having a rising rim that rises from the periphery of the flange, and folding the upper edge of the rising rim into an edge portion,
An aluminum foil characterized in that at least a part of the rising rim is a tapered part that spreads toward the open end, and a part that is continuously opposed to the edge part of the rising rim is a vertical part perpendicular to the flange. Molded container.   2. The aluminum foil molded container according to claim 1, wherein a portion immediately above the peripheral edge of the rising rim is set as another vertical portion that rises perpendicular to the flange. The trimmed part of the width (E), the other vertical portion of the width (V ₁₎ and the aluminum foil forming container described in claim 2 which is formed so as to satisfy the following equation relationship.
1 × E ≦ V ₁ ≦ 1.8 × E And the trimmed part of the width (E), an aluminum foil forming according to any one of claims 1-3 in which the relationship is formed so as to satisfy the following equation with the one of the vertical portion of the width (V ₂₎ container.
1 × E ≦ V ₂ ≦ 1.5 × E The aluminum foil molded container according to any one of claims 1 to 4, wherein a relationship between a width (T) of the tapered portion and a width (R) of the entire rising rim satisfies the following formula.
0.2 × R ≦ T ≦ 0.5 × R The aluminum foil molded container according to any one of claims 1 to 5, wherein an angle (α) formed between the tapered portion and a vertical line with respect to the flange satisfies the following condition.
5 ° ≦ α ≦ 20 °

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