JPH1111506A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely form a necessary flange, by forming the flange laterally stretched at the opening edge of a container body or a cover body and forming small protrusions the external ends of the bottom of which are positioned at the outer peripheral edge of the flange face, at the boundary between the flange and the peripheral wall continuously extended at nearly right angles against the flange. SOLUTION: A cover body 10b is continuously extended at nearly right angles against the peripheral wall and provided with a laterally stretched flange 11 of the cover body 10b. A plurality of small protrusions 13 the external ends of the bottom of which are positioned at the outer peripheral edge of the flange 11, are formed at the boundary of the flange 11 and the peripheral wall. When the packaging container 10 is punched out by a punching press, respective small protrusions 13 are pushed inward by the inside face of the female cutter 22b owing to the small protrusions 13, and the flange 11 positioned between small protrusions 13 is always arranged at the inside of the female cutter 22b. Accordingly, when the packaging container is punched out, a complete and sufficiently wide flange 11 can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container for storing and packaging foods and the like, and more particularly to a packaging container formed of a synthetic resin.

[0002]

2. Description of the Related Art Packaging containers for containing and packaging foods and the like can be made sanitary, can be easily manufactured at low cost, and can be provided at low cost. Due to the fact that the processing can be easily performed and the like, a synthetic resin is often used as a material. In addition, this type of packaging container is described in, for example,
As shown in Japanese Patent Application Publication No. 7-20551, the container comprises a storage container body for directly storing foods and the like, and a lid fitted to the main body. As shown in FIG. 2, a flange portion extending in the lateral direction is formed for reasons such as increasing the overall rigidity.

In such a packaging container, for example, taking its lid as an example, as shown in FIG. 9, while continuously conveying a synthetic resin sheet material, molding by a mold 21 and a punching press 22 are performed. By continuously performing the punching by using the method, a large amount can be manufactured in a short time. Of course, the completed lid is collected by the stacking device 23 and wrapped in a certain number, and the sheet material after the lid is punched is
It is pulverized by the pulverizer 24 and used again as a material.

[0004] Since a synthetic resin sheet material is generally thin and soft, even if the sheet material is molded by a mold 21, a punching press 22 is used.
When punching out the sheet material, it is necessary to cut the sheet material in a state fixed by the knife blade 22b, the flange portion,
Generally at least 0.5 mm to 1.5 in the width direction
mm, and is punched out of the sheet material by the shearing of the male blade 22a and the female blade 22b of the punching press 22.

[0005] According to the situation at the time of manufacturing as described above, the molded packaging container is provided with the male blade 22 of the punching press 22.
a and the knife blade 22b, the flange portion is slightly misaligned due to the force of conveyance and the action of mechanical positioning, etc., so that the flange portion is not punched in a necessary and sufficient shape, and in some cases, Also, a state where the flange portion does not exist partially also occurs. If the flange part is not of sufficient size and width or does not exist,
If the rigidity of the portion is insufficient, if the cover is used, the fitting to the storage container main body cannot be sufficiently performed, and if the storage container main body is used, the rigidity of the opening is insufficient.

Further, if the flange portion of the packaging container is not of a sufficient size and width or does not exist, the following problems may occur when food is stored in the packaging container. become. For example, taking a lid as an example, as shown in FIG.
1 are taken out one by one by a suction device 32 and fitted into a storage container body storing foods and the like. Although a large number of lids accumulated by the accumulation device 23 shown in FIG. 9 are accommodated in the storage device 31, the flanges of the lids are not of sufficient size and width or are not present. Otherwise, the lids may not be taken out one by one and the lid may be taken out extra.

[0007] Because, as shown in FIG. 8, a large number of the lids may be combined as a whole in an inclined state, as shown in FIG. 8, and the support bar 33 constituting the storage device 31 may be provided.
Is supported by surrounding the periphery thereof, and the most advanced lid is a small claw 3 provided at the tip of each support bar 33.
3a is supported by slightly engaging the flange portion. Therefore, if the flange portion is not of a sufficient size and width or does not exist, each lid cannot be supported by the claw 33a, and is easily detached from the storage device 31 by its own weight or the like. It is.

Therefore, the present inventor can form the flange portion sufficiently and reliably by devising some kind of packaging container made of such a rigid resin, thereby preventing the container from falling off from the storage device 31. As a result of various studies on how to make it possible, the present invention has been completed.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to reliably form a flange portion necessary for this kind of packaging container. It is.

That is, the object of the present invention is to
A simple packaging container capable of reliably forming a necessary flange portion, reliably providing a necessary rigidity to the flange portion, and reliably holding the storage device. It is to provide by a simple configuration.

[0011]

Means for Solving the Problems In order to solve the above-mentioned problems, first, means adopted by the invention according to claim 1 will be described with reference numerals used in the following embodiments. "A synthetic resin packaging container 10 for storing and packaging foods and the like, wherein a storage container main body 10a constituting the packaging container 10 or a lid 10 fitted thereto is provided.
A bottom outer end 13a is formed outside the flange 11 at the boundary between the flange 11 formed on the periphery of the opening b and extending in the lateral direction and the peripheral wall 12 substantially continuous to the flange 11 at right angles. A packaging container 10 "characterized by forming a micro-bulge 13 located on the periphery.

That is, the packaging container 10 according to the present invention.
Regardless of whether it is the storage container main body 10a or the lid 10b, the micro-bulging portion 13 is formed at the boundary between the flange portion 11 and the peripheral wall portion 12 which is substantially orthogonal to and continuous with the flange portion. The small bulging portion 13 enables the flange portion 11 to be formed as necessary and sufficient.

If the packaging container 10 is punched out by the punching press 22 if the micro-bulging portion 13 is present, as shown in FIGS.
Since each minute bulge 13 is pushed inward by the inner surface of b, the flange 11 located between these minute bulges 13 always exists inside the knife blade 22b. . Therefore, when the packaging container 10 is punched as the storage container main body 10a or the lid 10b, the flange portion 11 is completed with a complete and sufficient width, that is, as designed. In particular, as shown in the following embodiments, if a plurality of micro-bulging portions 13 are provided, the storage container body 10a or the lid 10b will be disposed at the center between the knife blades 22b and the like, The flange portion 11 is not partially chipped.

Further, in the packaging container 10, as shown in FIG. 3 (b), cutting may be performed by a Thomson blade, but even in this case, each minute bulging portion 13 is formed by the inner surface of the Thomson blade. Is pushed inward, the flange portion 11 located between these minute bulging portions 13 always exists inside the Thomson blade. Therefore, even when cutting is performed using this Thomson blade, the flange portion 11 is completed as a complete and sufficient width, that is, as designed.

If the flange portion 11 is sufficient, the rigidity of the portion becomes sufficient or as designed, and if the lid 10b, the fitting to the storage container main body 10a can be sufficiently performed. In addition, in the case of the storage container body 10a, the rigidity of the opening is sufficient.

As shown in FIG. 8, each packaging container 10 is surrounded by a support bar 33 constituting a storage device 31, and the most advanced packaging container 10 is
A small claw 33a provided at the tip of each support bar 33 is slightly engaged with the flange portion 11 and supported. Since the flange portion 11 of the packaging container 10 has a sufficient size and width as described above, and is not partially missing, the flange portion 11 easily comes off the storage device 31. There is no need to take out one by one without fail.

Further, in order to solve the above-mentioned problem, the means adopted by the invention according to claim 2 relates to the method according to claim 1, wherein the fine projections 13 are provided on the upper part 13 of the packaging container 10.
b is smaller than the bottom portion 13a ”. That is, the packaging container 1 according to claim 2
In the case of 0, the small bulging portion 13 having a small shape itself is used, so that the upper portion 13b is further smaller than the bottom portion 13a, and the scalpel blade 22b constituting the punching press 22 enters on the side where it enters. Is formed so as to be smaller.

Therefore, according to the packaging container 10 of the present invention, when the mold is molded and then die-cut, the micro-bulges 13 are not obstructed, and the die-cut is used for packaging. This can be performed without causing deformation of the container 10.
In addition, when the packaging container 10 is cut out by the knife blade 22b of the punching press 22, as shown in FIG. 2, the upper part 13b of each minute bulging portion 13 is located inside the knife blade 22b. , The packaging container 10 guides the knife blade 22b toward the bottom portion 13a, so that especially the entire flange portion 11 of the packaging container 10 is completely located inside the knife blade 22b. Even if the above-mentioned deformation occurs, the packaging container 10 having the flange portion 11 having a necessary and sufficient width can be cut out.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a packaging container according to an embodiment of the present invention; Since it is substantially contained in the packaging container 10, the following description will focus on the packaging container 10 which is the embodiment shown in the drawings.

FIG. 1 is a plan view of a packaging container 10 according to the present invention. The packaging container 10 is formed by fitting a lid 10b to an upper opening of a storage container body 10a. However, the lid 10b is mainly shown in the drawing. In the following, description will be made mainly on the lid 10b, but it goes without saying that the present invention can be similarly applied to the storage container body 10a.

Each of the lids 10b is molded from a synthetic resin sheet material so that a large number of the lids can be taken out by a mold 21 as shown in FIG.
It is formed by punching into a predetermined shape by 2. At the time of this punching, as shown in FIG. 2, the boundary between the flange portion 11 formed on the periphery of the opening of the lid 10b and extending in the lateral direction and the peripheral wall portion 12 which is substantially orthogonal to and continuous with the flange portion. The small bulging portion 13 formed in the portion and having the bottom outer end 13a located on the outer peripheral edge of the flange portion 11 is guided inside by the knife blade 22b.

That is, this lid 10b is
As shown in FIG. 3, the peripheral wall portion 12 which continuously hangs from the main body portion (the upper surface portion because it is the lid 10b) and is fitted to the peripheral edge of the opening of the storage container main body 10a, and the peripheral wall portion 12
And a flange 11 extending substantially in the horizontal direction of the lid 10b and extending substantially orthogonally to the lid 10b. A boundary portion between the flange 11 and the peripheral wall 12 is provided at (a) in FIG. As shown in enlarged form, a plurality of minute bulges 13 whose bottom outer end 13a is located on the outer peripheral edge of the flange 11 are formed.

In the storage container body 10a, as shown in FIGS. 2 and 6, when a large number of cut out pieces are stacked, for example, as shown in FIGS. 4 and 9, they do not fit each other. For this purpose, a stack protrusion 14 is formed so as to bulge at a boundary between the main body portion and the peripheral wall portion 12. Further, in the storage container body 10a,
As shown in FIG. 3A and FIG. 5, the storage container body 1
A plurality of engaging recesses 15 for exerting an engaging action when fitted to the periphery of the opening of the opening 0a are formed. Is formed.

As shown in FIG. 3A and FIG. 5, each of the micro-bulges 13 has an upper portion 13b having a bottom portion 13a.
It is formed so as to be even smaller than when viewed from the front or in a cross section, so that the upper side in the figure has a triangular shape. The reason for this is that the upper portion 13b of each of the micro bulges 13 can guide the knife blade 22b and the like on the punching press 22 side.

[0025]

As described in detail above, according to the packaging container 10 of the first aspect, since it is configured as exemplified in the above embodiment, the necessary flange portion 11 can be formed reliably. The required rigidity can be reliably given to the flange portion 11 and the holding in the storage device can be surely performed.
It can be provided by a simple configuration.

In particular, as in the packaging container 10 according to the second aspect, each of the micro-bulges 13 is formed such that its upper part 13b has a lower part 13b.
If it is formed so as to be smaller than a, the object of the first aspect of the present invention can be achieved.
Can be positively performed, and the production of the main packaging container 10 can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a plan view of a packaging container according to the present invention.

FIG. 2 is a partially enlarged plan view showing a state where the packaging container shown in FIG. 1 is punched out with a scalpel blade.

3 is a partially enlarged longitudinal sectional view of the lid taken along line 1-1 in FIG. 2, wherein (a) is a partially enlarged longitudinal sectional view also showing a state of punching with a scalpel blade, (b) FIG. 3 is a partially enlarged longitudinal sectional view also showing a state of punching with a Thomson blade.

FIG. 4 is a partially enlarged sectional view showing a state where a plurality of lids according to the present invention are stacked.

FIG. 5 is a front view of the lid.

FIG. 6 is a longitudinal sectional view of the lid.

FIG. 7 is a perspective view schematically showing a state where many of the lids are stored in a storage device and are taken out one by one by a suction device.

FIG. 8 is a cross-sectional view schematically showing a state in which a large number of the storage container bodies are stored in a storage device and are taken out one by one by a suction device.

FIG. 9 is a cross-sectional view schematically showing a state in which a number of packaging containers are formed from a synthetic resin sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Packaging container 10a Storage container main body 10b Lid body 11 Flange part 12 Peripheral wall part 13 Micro bulge part 13a Bottom part 13b Upper part 14 Stack protrusion 15 Engagement recessed part 21 Type 22 Punching press 22a Male blade 22b Female blade 31 Storage device 32 Suction cup Device 33 Support bar 33a Claw

Claims (2)

[Claims] 1. A synthetic resin packaging container for storing and packaging foods and the like, comprising a storage container body constituting the packaging container, or a peripheral edge of an opening of a lid fitted into the storage container body. A flange portion formed in the lateral direction and a boundary portion between a peripheral wall portion that is substantially orthogonal to and continuous with the flange portion, a small bulging portion whose bottom outer end is located at the outer peripheral edge of the flange portion. A packaging container characterized by being formed. 2. The packaging container according to claim 1, wherein the fine projections are formed such that an upper part thereof is smaller than the bottom part.