JPH0920325A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a container that has a simple constitution and can prevent a wrapping material from breaking and dissolve an inconvenience during handling, by intentionally forming cut-off parts along the edge of a flange. SOLUTION: Containers 10 are produced in such a way that they are multiple- die-molded of a synthetic resin sheet in a large number so that their lugs to be scraps and flanges 11 formed at the upper parts are connected via joints, and then punched out with a Tomson blade to separate them from the lugs. A joint forming groove of the Tomson blade to form the joints has a scrap-side groove and a product-side groove smaller than the scrap-side groove, and the joints are left on the lug side when the lugs are pulled apart, so that cut-off parts 12 are formed along the edge of the flange 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container made of synthetic resin, and more particularly to a packaging container in which a large number of synthetic resin sheets are taken.

[0002]

2. Description of the Related Art A synthetic resin packaging container of this type is provided as a very inexpensive one by mass production, but the production is generally performed as shown in FIG. Done by the device 20.

That is, for example, a synthetic resin sheet 10a, which is a long-sized polyethylene sheet which is foamed to have a thickness of 3 to 4 mm, is cut into a predetermined length by the constant length cutting section 21, and then the synthetic resin sheet 10a is synthesized. The resin sheet 10a is heated as required and carried into the mold forming machine 23. Since a mold for forming a large number of packaging containers is arranged for one synthetic resin sheet 10a in the mold forming machine 23, the mold forming machine 23 can be used for, for example, vacuum forming or pressure forming. By means of the means, a large number of packaging containers are molded as shown in FIG. The predetermined length cutting of the synthetic resin sheet 10a at the constant length cutting part 21 may be performed after the molding of the packaging container by the molding machine 23.

After this molding, the molded synthetic resin sheet 10a is transferred to the punching machine 23 in the next stage and formed into individual packaging containers connected by the ears 13,
Furthermore, each packaging container is separated by the separator 24 at the next stage.

In the above molding apparatus 20, the packaging containers must not be separated from each other while the molded synthetic resin sheet 10a is transferred from the punching machine 23 to the separating machine 24. This is because, in the separator 24, each of the separated packaging containers is packed in a predetermined number, for example, in a bag. If the molded synthetic resin sheet 10a is used, one packaging container is formed. This is because the entire lot becomes a defective lot with insufficient quantity.

Therefore, the punching blade used in the punching machine 23, that is, the Thomson blade 25, has a connecting portion forming groove 26 as shown in FIG. The Thomson blade 25 is basically for punching out the outer shape of a packaging container which is a product.
6 is to leave a connecting portion 14 for partially connecting each product to the ears 13 to be scraped, as shown in FIG. 3, for example. As a result, each product
As shown in FIG. 3, the outer shape is punched out by the Thomson blade 25 assuming that it is connected to the ear 13 via each connection portion 14, and is transferred to the separator 24 while being integrated with the ear 13. It will happen. Separator 2
In FIG. 4, since each connecting portion 14 is cut by pushing each product with a rod or the like, each product becomes a single item separated from the ear 13.

In the conventional packaging container formed as described above, the protrusion 30 is often left on the outer edge of the punched flange 31 as shown in FIG. The protrusion 30 is actually the above-mentioned connecting portion 14 left on the outer edge of the flange 31, but is formed for the following reason. That is, the connecting portion 14 is the connecting portion forming groove 26 of the Thomson blade 25 described above.
The connection portion forming groove 26 of the Thomson blade 25 is formed by the product side and the ear 13 as shown in FIG.
Since the side having the same width as that of the connecting portion 14 has the same width, the connecting portion 14 has a uniform thickness as shown in the upper portion of FIG. Therefore, when attempting to divide the connecting portion 14, as shown in FIG.
Since the cutting part 32 may be biased toward the ear 13 side,
As a result, the connection portion 14 becomes the protrusion 30 and remains on the product side.

Although the protrusion 30 is small according to the width of the connecting portion forming groove 26 of the Thomson blade 25,
If it exists on the outer edge of the flange 31, the wrap will be damaged when it is hung.
In other words, when food is stored in this type of packaging container, it is necessary to wrap it with a transparent thin synthetic resin film in order to prevent the food from drying and maintain its freshness. Even a small protrusion 30 can be easily torn. In particular, if the projection 30 is present on the outer edge of the flange 31, it will cause damage to the wrap, which is always present here.

When the synthetic resin sheet 10a is relatively hard, for example, such a protrusion 30 not only makes a worker who handles the packaging container uncomfortable but also mounts it on a machine. When attempting to automate the work of storing or wrapping, the projection 30 may be caught in the machine, which may make automation difficult.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem to be solved is to obtain a large number of packaging containers from one synthetic resin sheet, It is the removal of the protrusions 30 that tend to occur at the edge of the flange of each packaging container.

That is, the object of the present invention is as follows.
It is an object of the present invention to provide a packaging container 10 having a simple structure that can eliminate damage to the wrap and troubles during handling by positively forming the cutout portion 12 on the edge of the flange.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems, the means adopted by the present invention will be described with reference to the reference numerals used in the examples. A packaging container 10 in which a scraped ear 13 and a flange 11 formed on the upper portion are connected to each other at a connecting portion 14 is punched out by a Thomson blade 25 and separated from the ear 13 to obtain a large number of them.
And the Thomson blade 25 for forming the connection portion 14
The connecting portion forming groove 26 is composed of a scrap side groove 26a and a product side groove 26b smaller than the scrap side groove 26a, and the cutout portion 12 formed by leaving the connecting portion 14 on the ear 13 side at the time of separation is formed at the edge of the flange 11. The packaging container 10 "is characterized in that.

That is, the packaging container 10 according to the present invention.
Is formed by the molding machine 23 of the molding apparatus 20 and then punched by the Thomson blade 25 of the punching machine 23. At that time, the respective flanges 11 are connected to the ears 13 and the connection portion 14 which are not products. Therefore, the punching machine 23 to the separator 24
A large number of them are integrated with the ears 13 so as not to fall apart when being transported to. Then, the packaging container 10 which has finally become an independent container has the flange 11 by the connection portion 14 remaining on the ear 13 side.
The cut portion 12 is formed at the edge of the.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In order to form the packaging container 10 in which the cutout portion 12 is positively formed, its manufacturing method must be established. The manufacturing method is as follows. . That is, the packaging container 10 can be basically manufactured by using the conventional molding device 20 as shown in FIG. In the punching machine 23 that punches each packaging container 10 individually, the Thomson blade 25 as shown in FIG. 2 may be adopted.

With this Thomson blade 25, when punching the outer shape of the packaging container 10 from the synthetic resin sheet 10a, as shown in FIG.
1 and a selvage 13 to be discarded as scrap, a connecting portion forming groove 2 for forming a plurality of small connecting portions 14
6 are formed. The connecting portion forming groove 26 of the Thomson blade 25 is, as shown in FIG. 2, toward the scrap side groove 26a that is enlarged toward the ear 13 side and toward the product side, that is, the flange 11 side of the packaging container 10. When the synthetic resin sheet 10a is punched out by the Thomson blade 25 having the connecting portion forming groove 26, which is divided into the smaller product side groove 26b, the synthetic resin sheet 10a partially shown in the upper part of FIG. It becomes like.

That is, the flange 11 of the packaging container 10 is provided in the vicinity of the cutting line L which is the outer shape of the packaging container 10.
The connecting portion 14 that slightly connects the ear 13 to the ear 13 is not largely cut by the scrap side groove 26a in the connecting portion forming groove 26 in the portion on the ear 13 side, so that the connecting portion 14 is about the thickness of the synthetic resin sheet 10a. The thickness remains close. On the other hand, the connecting portion 14 on the right side of the cutting line L in FIG.
Since b was small, the synthetic resin sheet 1
The thickness is about half or less than the thickness of 0a.

Therefore, when each packaging container 10 is forcibly separated from the ear 13 in this state, a cut 15 as shown in FIG. Therefore, as shown in (b) of FIG. 4, in a state where the connection portion 14 or a portion of the connection portion 14 and the flange 11 remains on the ear 13 side,
Each of the packaging containers 10 is separated from the synthetic resin sheet 10a, assuming that the flange 11 has the cutout portion 12 at the edge thereof.

That is, each excision portion 12 is shown in FIG.
Of the flange 11 as shown in the upper side of FIG. 4 or a small linear recess that matches the edge of the flange 11 as shown in the lower side of FIG. 4B. Become. In any case, each of these cutouts 12 is never at least a projection 30 as in the conventional packaging container shown in FIG.

The packaging container 10 according to the present invention constructed as described above has a plurality of cut portions 1 at the edge of the flange 11.
However, even if the packaging container 10 is the dish-shaped container shown in FIG. 1 (a), the cut-out portion 12 shown in FIG. Even if it is the so-called deep cup-shaped one shown in (b), the flange 1
No. 1 has no influence on the rigidity of the opening provided to the packaging container 10 at all.

Of particular importance is this packaging container 10.
In the conventional packaging container 10 shown in FIG. 8, the protrusion 30 remained on the edge of the flange 11, but no such protrusion 30 existed. The cutout 12 opposite to 30 is the flange 11
Is present at the edge of the
This means that even if the packaging container 10 is covered with a tearable wrap, the wrap is never damaged.

Each of these cutouts 12 becomes a small recess left on the edge of the flange 11 as shown on the upper side of FIG. 4B, or on the lower side of FIG. 4B. As shown in the drawing, the cutting portion 12 has a linear shape that coincides with the edge of the flange 11 as shown, but in any case, each of these cutouts 12 has at least the projection as in the conventional packaging container shown in FIG. Thirty is never.

Further, since each cutout portion 12 is literally recessed in the end edge of the flange 11, it does not get caught on human hands, gloves, or a part of the machine, and the packaging container 10 is not cut. It can be handled smoothly without any hindrance.

Moreover, each cutout portion 12 is formed by tearing apart a part of the synthetic resin sheet 10a, and although it tends to have an irregular shape, it is a small one, so it is necessary to pay close attention. Unless it is not visible, the quality of the packaging container 10 as a product is not affected at all. The reason is that the connecting portion 14 which is the origin of the cutout portion 12 is transferred from the punching machine 23 of the molding apparatus 20 to the separator 24 in the first place and when the synthetic resin sheet 10a is set in the separator 24. This is because the packaging container 10 is very thin because it can be connected to the ear 13, and the cutout portion 12 formed by cutting the thin connection portion 14 is also very small.

[0024]

EXAMPLE An example of the packaging container 10 according to the present invention having the above-described structure will be described below, focusing on a specific manufacturing method thereof.

First, regarding the synthetic resin sheet 10a, in this embodiment, a long foamed polyethylene (density: 0.148 g / cm ² ) having a thickness of 1.65 mm and a width of 1040 mm is adopted. It is made to flow over the molding apparatus 20 shown in FIG. In the standard length cutting unit 21 of the molding apparatus 20, since the size of the mold in the mold molding machine 23 in the next stage is 1000 mm, the synthetic resin sheet 10a is cut according to this length, and this length is cut. The synthetic resin sheets 10a are sent one by one to the molding machine 23. In the molding machine 23, a mold for picking up a large number of packaging containers 10 is installed. By molding each synthetic resin sheet 10a for 2 seconds by the molding machine 23, as shown in FIG. What is formed.

The predetermined length of the synthetic resin sheet 10a is cut by the standard length cutting section 21 after the molding of the packaging container by the molding machine 23, as described in the section of the prior art. Sometimes. In addition, in this embodiment, in order to facilitate the molding by the molding machine 23, the synthetic resin sheet 10a is heated to about 110 ° C. or heated to an ambient temperature of 230 ° C. in the preceding step. It is made to soften by passing through the furnace for about 18 seconds.

The molded synthetic resin sheet 10a is sent to a punching machine 23 and punched for each packaging container 10. In this punching machine 23, as shown in FIG.
As shown in FIG. 3, each packaging container 10 is connected to the scraped ear 13 by each connection portion 14. The reason for doing so is that if the packaging containers 10 are punched out by the punching machine 23 so as to be completely separated, it becomes difficult to take out the packaging containers 10 and prepare for packaging in bulk. Since it becomes difficult to continuously mold the seed packaging container 10 within a short time, the punching is performed by the punching machine 23, and each packaging container 10 is separated by the next-stage separator 2.
This is because it is necessary to divide the work, such as in 4.

In this punching machine 23, a Thomson blade 25 for punching each packaging container 10 from the synthetic resin sheet 10a is adopted. The Thomson blade 25 has a packaging container 10 side. The flange 11
14 for connecting between the ear and scrap 13
The connecting portion forming groove 26 for forming the is formed as shown in FIG. The connecting portion forming groove 26 is for leaving a part of the synthetic resin sheet 10a as the connecting portion 14, but is divided into a scrap side groove 26a on the left side of the drawing and a product side groove 26b on the right side of the drawing. That is, the scrap side groove 26a is formed on the ear 13 side of the synthetic resin sheet 10.
A is formed as deep as possible so as not to be cut as much as possible, and in this embodiment, the opening of the scrap side groove 26a at the left end surface in FIG. 2 is about 2 mm. On the other hand, the product side groove 26b is formed to be shallow so as to make as many cuts as possible in the synthetic resin sheet 10a on the flange 11 side, and in the present embodiment, the opening of the product side groove 26b on the right end surface in the figure is approximately equal. It is set to about 1 mm.

When the die-molded synthetic resin sheet 10a is punched out by the punching machine 23 having the Thomson blade 25 as described above, the synthetic resin sheet 10a becomes a packaging container as shown in FIG. 10 is formed to be connected to the ear 13 at each connection portion 14. Therefore, the packaging containers 10 are transferred to the next-stage separator 24 without being separated from each other while being connected to each other via the ears 13.

In the separator 24, the ears 13 on the outer periphery of the synthetic resin sheet 10a are fixed, and each packaging container 10 is fixed.
Are separated from the ears 13 by, for example, pushing down, and each separated packaging container 10 is sent to a portion for packing a predetermined number of pieces through a chute or the like (not shown) arranged at that position. Of.

Looking at the separation state at this time in detail,
This is as shown in FIGS. 2 and 4. That is, the packaging container 10 before being separated is, as shown in FIG.
Although it is connected to the ears 13 via the respective connection parts 14, when the ears 13 side is fixed and a pressing force is applied to the packaging container 10, the connection parts 14 are connected to the ears 13.
Cut 1 as in the synthetic resin sheet 10a shown in FIG.
5 comes in first. Since the connecting portion 14 is thin on the flange 11 side, the cut 15 is almost surely inserted toward the flange 11 side. That is, as shown in FIG. 4B, the respective connecting portions 14 are left almost always on the side of the ear 13, so that the respective connecting portions of the edges of the flange 11 of the packaging container 10 are connected. Part 1
As shown in FIG. 1, the cutout portion 1 corresponds to the portion 4
2 is surely formed.

[0032]

As described above, according to the present invention,
As illustrated in the above embodiment, "the synthetic resin sheet 10a
A plurality of ears 13 which are molded and scraped into a scrap and a flange 11 formed on the upper part are connected by a connecting portion 14 are punched by a Thomson blade 25, and a large number are taken by separating them from the ears 13 respectively. In the packaging container 10, the connection part forming groove 26 of the Thomson blade 25 for forming the connection part 14 is composed of a scrap side groove 26a and a product side groove 26b smaller than the scrap side groove 26a. The cutout 12 formed by leaving it on the side was formed on the edge of the flange 11. "
The feature of this is that the cutting container 12 is positively formed on the edge of the flange, whereby the packaging container 10 capable of eliminating the damage of the wrap and the trouble during handling can be formed with a simple structure. Can be provided.

[Brief description of drawings]

FIG. 1 shows a packaging container according to the present invention.
FIG. 3 is a perspective view illustrating a dish-shaped one and a cup-shaped one (b).

FIG. 2 is a partially enlarged cross-sectional view showing a relationship between a connection portion and a Thomson blade, which shows a state when a cut portion of the packaging container according to the present invention is formed.

FIG. 3 is a perspective view of a synthetic resin sheet showing a state in which a large number of packaging containers are formed on a synthetic resin sheet and each packaging container is punched by a punching machine.

FIG. 4 is a partially enlarged plan view showing (a) and (b) before and after separating each packaging container from the ear.

FIG. 5 is a schematic front view of a molding apparatus used for manufacturing the packaging container of the present invention.

FIG. 6 is a partially enlarged perspective view showing a conventional Thomson blade.

FIG. 7 is a partial enlarged cross-sectional view of the same Thomson blade centering on a connection portion forming groove.

FIG. 8 is a perspective view showing a conventional packaging container.

[Explanation of symbols]

 10 Packaging Containers 10a Synthetic Resin Sheets 11 Flange 12 Cutouts 13 Ears 14 Connections 15 Cuts 20 Molding Device 21 Standard Length Cutting Parts 22 Molding Machine 23 Punching Machine 24 Separator 25 Thomson Blade 26 Connection Forming Groove 26a Scrap Side Gutter 26b Product side groove 30 Protrusion 31 Flange 32 Cutting part L Cutting line

Claims (1)

[Claims] 1. A synthetic resin sheet, which is multi-molded, has ears to be scraped and flanges formed in the upper part connected at a connecting portion, is punched by a Thomson blade, and is separated from the ears by a large number. In a packaging container to be individually taken, the connection part forming groove of the Thomson blade for forming the connection part is composed of a scrap side groove and a product side groove smaller than this, and the connection part is left on the ear side at the time of separating. A packaging container characterized in that a cut portion formed by the above is formed on an edge of the flange.