JPH08175556A - Plastic container - Google Patents

Abstract

PURPOSE: To provide a plastic container that is equipped with a container cover capable of withstanding to the state of being stacked up for display on a store front even though the cover is made up by vacuum forming that is disadvantageous in terms of strength. CONSTITUTION: A container cover 20, made up by vacuum forming or pressure forming, is composed of a cover top face 21 having an area S for supporting the bottom of a container main body to be put thereon, a projecting rim 23 rising upward for demarcating the area on the cover top face 21, and a skirt 27 extending downward through a connecting belt 25 connecting to the lower end 23b on the external wall 23a of the projecting rim 23. The lower end 23b on the external wall 23a of the projecting rim 23 provided on the container cover 20 is set so that it can be positioned within the width of a flat part on a flange 41 of the container main body, and the skirt 27 of the container cover has an inwardly projecting belt-like channel 29, and the projecting belt-like channel 29 is constructed so that it can be engaged with the external edge 43a of an inclined belt-like part 43 of the container main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic container having a bottomed cylindrical container body and a container lid attached to the container body, and is particularly used for storing miso, pickles, fermented foods and the like. Related to the container.

[0002]

2. Description of the Related Art Conventionally, for example, when a fermented food such as miso is packed in a predetermined weight package and displayed at a store for sale, the packaging is a simple packaging form and the cost is inexpensive. Was used. However, such foods are not usually used up all at once, but the contents are dispensed little by little and used for a relatively long period of time. Therefore, the usual plastic bag form has a problem in that it is not convenient to use, and in addition, an attached matter such as miso remains on the outlet of the bag and is unsanitary. In addition, there is a demand for an increase in sales of high-grade miso due to consumers' preference for high-grade products, and a corresponding increase in the quality of containers.

Under these circumstances, a product in which miso or the like is stored in a high-grade plastic container composed of a bottomed cylindrical container body and a container lid attached to the container body is already on the market. It started to appear. Such plastic containers, especially container lids, are generally made of thick-walled injection-molded products in consideration of their strength so that they can be stacked in multiple stages when displayed and sold in stores. in use. Also, from the viewpoint of hygiene and ease of use, some of the injection-molded product container lids have begun to be fitted with an opening / closing lid piece.

[0004]

However, the containers of these injection-molded articles are heavy because of their wall thickness, high in cost as a temporary consuming packaging material, and excessive in quality as a disposable type. . Further, the one to which the opening / closing lid piece provided with the hinge portion is attached is limited to a specific material such as polypropylene, and there is a problem that the freedom of material selection is poor.

The present invention was devised based on the above circumstances, and its purpose is to be light and easy to handle, to be inexpensive, to be free from excessive quality, and to have a high degree of freedom in selecting materials. By using a vacuum formed product for the container lid and setting the structure of the container lid to a predetermined shape in relation to the container body, it is a molded product that is originally thin in thickness and is disadvantageous in strength. Even so, it is to provide a plastic container including a container lid that can withstand stacking of containers in a store display.

Another object of the present invention is to provide a plastic container having a container lid which can also be formed with an opening / closing lid piece.

[0007]

In order to achieve such an object, the present invention has a bottomed cylindrical container body for accommodating contents, and an opening portion of the container body. A plastic container having a container lid attached to,
The container body has a bottomed tubular body portion having an opening portion for storing contents, a flange portion provided with a flat portion of a constant width connected to the opening portion and extending outward, and the flange portion. The container lid is formed by vacuum forming or pressure forming, and the bottom portion of the container main body is placed on the inclined portion. An upper surface of the lid having a possible area, a jetty portion projecting upward in order to regulate the area of the lid upper surface portion, and a downward direction via a connecting band connected to the lower end portion of the outer wall of the jetty portion. And a lower end portion of the outer wall of the jetty portion of the container lid is set so as to be located within the flat portion width of the flange portion of the container body, and The skirt part is provided with a convex groove band protruding inward. , The outer edge engageable with the configured inclined belt portion of the container body.

Further, the container lid which constitutes the plastic container is provided with a punching line which is intermittently arranged for forming an opening / closing lid piece on the periphery of the lid, and the punching line is the lower end of the outer wall of the jetty portion. The punching line is formed within the width of the portion or the connecting band connected to this portion, and the punching line along the straight portion of one side of the container lid is formed with perforations so as to form a rotatable opening / closing base, and the other punching is performed. The line is constructed to be stamped with several seams left for easy separation.

[0009]

In the present invention, the container lid is made of a vacuum-molded product that is light and easy to handle, is inexpensive, does not have excessive quality, and has a high degree of freedom in selecting materials. In order to compensate for the weakness of the container, the structure of the container lid is set to a predetermined shape in relation to the container body. Specifically, the lower end of the outer wall of the jetty portion of the container lid is set to be located within the flat width of the flange portion of the container body, and the skirt portion of the container lid has a protrusion protruding inward. The grooved groove is shaped like a groove, and this grooved groove is configured to be engageable with the outer edge of the inclined belt portion located on the outermost side of the container body. First, when containers are stacked on the container lid, the lower end of the outer wall of the jetty of the container lid installed within the flat width of the flange of the container body becomes the point of action (line) of the container load. .

When the container load exceeds a certain limit and becomes large, the skirt portion of the container lid has the above-mentioned point of action (line).
It behaves as if it were lifted up by the lever principle, and at this time, the convex groove band formed so as to project from the inner surface of the skirt part and the outer edge of the inclined band part of the container body are securely engaged. This ensures that the load stacked on the container lid is supported.

Further, the container lid which constitutes the plastic container is provided with a punching line which is intermittently arranged for forming an opening / closing lid piece on a peripheral edge of the lid, and the punching line is a lower end of an outer wall of the jetty portion. The punching line that is formed within the width of the section or the connecting band that is connected to the section and that extends along a straight line on one side of the container lid forms a rotatable opening / closing base, leaving a seam that cannot be easily separated manually. The other punching lines are punched with several joints left so that they can be easily separated. Therefore, in addition to being able to support the load stacked on the container lid, for example, the opening / closing lid piece can be opened by the consumer pressing a predetermined number of joints from the back surface side of the container lid with fingers or the like. Once formed, the contents can be taken out hygienically and easily. The rotatable opening / closing base may be formed by hinge molding.

When forming the hinge, the hinge portion may be formed so that the opening portions at both ends of the gutter-shaped portion formed by the sheet forming the hinge portion block the air flow from the opening portion of the container body by the flange portion of the container body. Desirable from a hygiene standpoint.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a container body 20 constituting a plastic container 1 of the present invention before being combined with a container lid 40, and FIG. 2 is a front view of the container body 20 after being combined. Yes, FIG. 3 is a plan view of FIG.

As shown in FIG. 1, the plastic container 1 of the present invention has a bottomed cylindrical container body 40 for accommodating contents, and a container lid 20 attached to the container body 40. .

The container body 40 has an opening 49 for taking out the contents, and a bottomed tubular body 45 for temporarily storing the contents.

A flange 41 having a flat portion of a constant width extending outward is formed in the opening 49 so as to be connected to the opening 49, and the outer peripheral end of the flange 41 is formed. The inclined strip portion 4 extending below the container
3 are connected and formed.

The bottomed cylindrical body portion 4 of the container body 40 as described above.
No particular limitation is imposed on the cross-sectional shape of 5, and various shapes such as a substantially rectangular shape, a substantially square shape, and a substantially semicircular shape can be adopted. Considering that an opening / closing lid piece structure is provided as described later,
It is desirable to have a cross-sectional shape with one straight line portion. The container body 40 may be formed by any molding method such as injection molding or vacuum molding, and there is no particular limitation. The resin to be used is also not particularly limited, but usually, a raw material for forming a thermoplastic resin simple substance, a sheet, or a laminated sheet made of these resins is used. Specifically, the former can be exemplified by polyacrylonitrile (PAN), vinyl chloride (PVC), polystyrene (PS), polypropylene (PP), etc., and the latter is polyethylene terephthalate and ethylene / vinyl acetate laminated sheet, (PET /
Examples thereof include EVOH), polypropylene / ethylene / vinyl acetate laminated sheet (PP / EVOH / PP), and the like.
In particular, polyacrylonitrile (P
AN) simple substance, a sheet in which ethylene / vinyl acetate, an aromatic nylon (MX-NYLON) sheet are laminated, or the like is preferably used.

The container lid 20 is a container lid formed by so-called vacuum forming or pressure forming, and the plastic container of the present invention can be stacked and placed on the upper surface of the container lid 20. Bottom 48 of body 40
Installation area S larger than the outer diameter D1 (for example, outer diameter D2
(D2> D1)) is formed on the lid upper surface portion 21. In order to regulate the area of the lid upper surface portion 21 and to prevent lateral displacement of the plastic containers of the same type actually stacked on the lid upper surface portion 21, outside the lid upper surface portion 21, a jetty portion projecting upward. 23 is formed. Further, on the lower end portion 23b of the outer wall 23a of the jetty portion 23,
A connecting band 25, which is usually a flat surface, is connected to the connecting band 25, and a skirt portion 29 that is connected to the connecting band 25 and extends downward is formed.

As shown in FIG. 2, when the container lid 20 is attached to the container body 40, the lower end portion 23b of the outer wall 23a of the jetty 23 of the container lid 20 is used in the present invention.
However, it is set so as to be positioned within the flat portion width of the flange portion 41 of the container body 40 (in the present embodiment, the flange portions 41 are all formed flat). The preferred setting position is 20% to 80% from the inner circumference of the flange portion 41.
(Relative to the width of the flange portion 41), more preferably 50
% To 80%. With this setting, the container lid 2
0, when a new container is stacked, the container body 40
Container lid 20 placed within the flat width of the flange portion 41 of the
The lower end portion 23b of the outer side wall 23a of the jetty portion 23 is the point of action (line) of the container load. That is, the container load is firmly supported by the flange portion 41 of the container body 40.

Further, the skirt portion 27 of the container lid 20.
Has an inwardly projecting groove groove 29, and this groove groove 29 has an outer edge 4 of the inclined belt portion 43 of the container body 40.
3a can be engaged. Such a convex groove band 2
9 are preferably formed along the outer periphery of the skirt portion 27 with a constant space. There are no particular restrictions on the number, size, shape, etc. of the grooved strips 29 to be formed. Considering the material, wall thickness, etc. of the container lid 20, and the strength of the inclined strip portion 43 of the container body 40 for engagement. It may be selected as appropriate. By the way, in the case of the present embodiment, a total of four groove bands 29 are formed (at the positions corresponding to the four sides of the skirt portion 27,
As shown in FIG. 2, when the container lid 20 is attached to the container body 40, the formation position thereof is smaller than the outer edge 43a of the inclined band portion 43 of the container body 40 to engage. Is set to be located below.

As shown in FIG. 3, the container lid 20 is
A plurality of punching lines 30 and 35, which are intermittently arranged for forming the opening / closing lid piece, are provided on the periphery of the container lid. More specifically, the plurality of punching lines 30 and 35 are respectively formed within the width of the lower end portion 23b of the outer wall 23a of the jetty portion 23 or the connecting band 25 connected to the lower end portion 23b.
More preferably, the lower end portion 2 at the same position as the load acting line
3b or slightly outside. By doing so, the opening / closing lid piece formed is the opening 49 of the container body 40.
In addition, when the opening / closing lid piece is opened, no portion of the container lid 20 fitted to the main body covers the opening 49 of the container main body 40, so that the contents in the container can be easily stored. The effect is that it can be taken out. Moreover, the load due to stacking can be sufficiently dealt with.

In the embodiment shown in FIG. 3, the punching line is roughly classified into two types due to its nature. One punching line 35 is not intended to be cut out from the lid, but is a rotatable opening / closing base. Is a perforation for forming a line, and is usually formed linearly (indicated by a symbol L) in the vicinity of a straight line portion on one side of the container lid piece. The other punching line 30 is for the purpose of cutting from the lid for forming the opening / closing lid piece, and is punched with several joints (symbol C) left so that it can be easily separated.

The length of this seam is set so that it can be easily separated while taking into consideration the material and wall thickness of the container lid 20, but as a result of various experiments, it is 0.5 to 2.5 m.
It has been found that a range of m, more preferably 1.0 to 1.5 mm is good.

Incidentally, it is of course possible to form a known so-called hinge forming portion instead of the above-mentioned one punching line 35 for forming the rotatable opening / closing base portion.
In this case, the perforation punching line 35 is replaced by a continuous gutter-shaped groove. The punching line formed is only the punching line 30 for the purpose of cutting from the lid for forming the opening / closing lid piece.

Further, a cut eye is further provided on the opposite side of the rotatable opening / closing base (or hinge forming part) to the container lid 20.
It is also possible to insert the skirt portion 27 of the above and use this as the knob portion of the opening / closing lid piece. It is also possible to mark something on this part and have it cut with scissors or the like without making this cut.

In the present invention, the container lid 20 is formed by a vacuum forming method or a pressure forming method, and the thickness after forming is within a range of 0.05 to 1.0 mm.

The vacuum forming is either a female type or a male type.
Another method is to easily form a thermoplastic sheet by using heat and atmospheric pressure. Specifically, a rigid sheet is clamped in a frame suspended above the mold to heat and soften it, and then the sheet and the mold. A vacuum is applied between the sheets, the sheet is brought into close contact with the mold, and then cooled as it is to form a three-dimensional shape. Usually, vacuum molding refers to the case of using a female mold (cavity molding), but in the present invention, it is a broad concept including the case of using a male mold (drape molding) and the case of using a moving male plug (plug assist molding). Is defined.

In pressure molding, a sheet is clamped between a female mold and a heating platen, and air is blown from the mold side to bring the sheet into contact with the heating platen to soften it. Then, the blowing of the air is stopped, and compressed air ( ² to 3.5 kg / cm ² ) is blown from the hot platen to press the sheet against the molding surface of the female mold. . Hydraulic pressure or mechanical pressure may be used instead of compressed air.

The resin used for the container lid 20 is not particularly limited, but a sheet of thermoplastic resin alone or a laminated sheet made of these resins is usually used. Specifically, the former can be exemplified by polyacrylonitrile (PAN), vinyl chloride (PVC), polystyrene (PS), polypropylene (PP) and the like, and the latter can be polyethylene terephthalate and ethylene / vinyl acetate laminated sheet, (PE
T / EVOH), polypropylene / ethylene / vinyl acetate laminated sheet (PP / EVOH / PP), and the like. In particular, a polyacrylonitrile (PAN) simple substance having excellent barrier properties, a sheet in which ethylene / vinyl acetate, and an aromatic nylon (MX-NYLON) sheet are laminated is preferably used.

A suitable method for forming the punching lines 30 and 35 on the container lid 20 thus vacuum-formed is shown in FIG.

FIG. 4 shows a container lid 2 using a die press machine.
It is the figure which showed typically the situation which forms the punching line of a predetermined shape in 0a.

As shown in this figure, a pair of die presses 61 and 65 (upper plate 61 and lower plate 65) are placed opposite to each other, and a predetermined punching line pattern is formed on the lower die press 65. Blade type 73 with blade 71
And a mating type contact plate 77 for receiving the blade 71 is disposed on the upper side of the die press 61. Then, a predetermined number (about 10 to 20) of vacuum-molded container lids 20a on which punching lines are to be formed are arranged between these blades 71 and the contact plate 77. And a pair of die press 61,6
When 5 is operated, a punching line is formed at a predetermined position on the container lid 20a at a time (about 10 to 20 sheets are stacked).

The container lid 20b thus formed with a predetermined punching line uses a device of a pair of die presses 62, 66 (upper plate 62 and lower plate 65) having a punching blade 72 as shown in FIG. The outer circumference is trimmed,
Finally, the container lid 20 used for the product is formed.

When the contents are stored in the above-mentioned plastic container 1 for commercialization, normally, after the contents such as miso are stored in the container body 40, the opening is once heated with a hermetically sealing member. Seal, from the top of this sealing member,
The container lid 20 is attached to the container body 40.

When actually using such a product, the purchaser first removes the container lid 20 and removes the sealing member. Then, before the container lid 20 is fitted into the container body 40, for example, a punching line for forming the opening / closing lid piece is pushed up from the back side of the container lid to form the opening / closing lid piece, and this is finally the container body 40. A plastic container with an opening and closing lid piece is completed.

The present invention will be described in more detail below by showing specific examples. (Preparation of container body) A PAN (polyacrylonitrile) sheet having a thickness of 0.5 mm is prepared, which is preheated to 250 ° C. and then vacuum-formed to have a height of 90 mm and a width of 115 m.
A container body having m and a length of 115 mm and having the shape of the front view shown in FIG. 1 was produced. The molding cycle from residual heat to molding was 14 seconds. (Preparation of Container Lid) A 0.4 mm thick PVC (vinyl chloride) sheet was prepared, which was preheated to 240 ° C. and vacuum-formed to prepare a container lid having a width of about 118 mm and a length of about 118 mm. The molding cycle from residual heat to molding is 10 seconds, and the thickness of the container lid after molding is 0.1 to 10.
It was within the range of 0.4 mm.

Punching lines 30 and 35 as shown in FIG. 3 were formed on such a container lid by using a die press machine.

Several container bodies and container lids molded in this way were used, and after 750 g of miso was stored in the container body, several plastic containers covered with a container lid were made. When the containers were stacked in three layers, no abnormality was confirmed on the container lid.

When the punching line for forming the opening / closing lid piece was pushed up from the back side of the container lid to form the opening / closing lid piece, it was confirmed that the opening / closing lid piece could be formed really smoothly. The opening / closing lid piece was opened and closed 200 times, but the opening / closing lid piece was not torn from the opening / closing base (falling off).

[0041]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is a molded article which is originally thin in thickness by setting the structure of the container lid in a predetermined form in relation to the container body.
It is possible to provide a plastic container having a container lid that can withstand stacking of containers in a store display even if it is a vacuum-formed product, which is disadvantageous in strength. Furthermore, it is possible to provide a plastic container having a container lid that can also form an opening / closing lid.

[Brief description of drawings]

FIG. 1 is a front view showing a state before a container body and a container lid that constitute the plastic container of the present invention are assembled.

FIG. 2 is a front view after the container body and the container lid that constitute the plastic container of the present invention are combined.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a diagram schematically showing a situation in which a punching line having a predetermined shape is formed on a container lid using a die press device.

FIG. 5 is a diagram schematically showing a state in which final trimming is performed using a die press device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Plastic container 20 ... Container lid 21 ... Lid upper surface part 23 ... Jetty part 23a ... Outer side wall 23b ... Outer side wall lower end part 25 ... Connection band 27 ... Skirt part 29 ... Convex groove band 40 ... Container body 41 ... Flange Part 43 ... Inclined band part 43a ... Outer edge of the inclined band part 45 ... Bottomed cylindrical body part 49 ... Opening part

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[Procedure amendment]

[Submission date] July 18, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

FIG. 1 is a front view of a state before a container body 40 that constitutes the plastic container 1 of the present invention and a container lid 20 are combined, and FIG. 2 is a front view after these are combined. Yes, FIG. 3 is a plan view of FIG.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

There is no particular limitation on the cross-sectional shape of the bottomed tubular body portion 45 of the container body 40, and various shapes such as a substantially rectangular shape, a substantially square shape, and a substantially semicircular shape can be adopted. Considering that an opening / closing lid piece structure is provided as described later, it is desirable to have a cross-sectional shape having one straight line portion. The container body 40 may be formed by any molding method such as injection molding or vacuum molding, and there is no particular limitation. The resin to be used is also not particularly limited,
Usually, a molding raw material or a sheet of a thermoplastic resin alone or a laminated sheet made of these resins is used. Specifically, the former can be exemplified by polyacrylonitrile (PAN), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), etc., and the latter is a polyethylene terephthalate / ethylene / vinyl acetate copolymer laminated sheet, (PET / EVOH), polypropylene / ethylene / vinyl acetate copolymer laminated sheet (PP / EVOH / P
P) etc. can be illustrated. In particular, a sheet in which sheets of polyacrylonitrile (PAN), ethylene / vinyl acetate copolymer, and aromatic nylon polymer (MX-NYLON) having excellent barrier properties are laminated is preferably used.

Claims (5)

[Claims] 1. A plastic container having an opening and having a bottomed cylindrical container body for storing contents, and a container lid attached to the opening of the container body. The main body has a bottomed tubular body portion having an opening for storing contents, a flange portion provided with a flat portion of a constant width connected to the opening portion and extending outward, and a flange portion of the flange portion. An inclined strip portion that is connected to the outer peripheral edge and extends below the container, wherein the container lid is a container lid formed by vacuum forming or pressure forming, and the bottom portion of the container body can be placed. The upper surface of the lid, the projecting ridge portion protruding upward in order to regulate the area of the upper surface of the lid, and extending downward through the connecting band connected to the lower end portion of the outer wall of the ridge portion. And a lower end portion of the outer wall of the jetty portion of the container lid, The skirt portion of the container lid is set so as to be located within the flat width of the flange portion of the container body, and the container lid is provided with a convex groove band projecting inward. A plastic container, which is engageable with an outer edge of an inclined band portion of a container body. 2. The container lid is provided with a punching line, which is arranged intermittently for forming an opening / closing lid piece, on a peripheral edge of the lid, and the punching line is connected to a lower end portion of an outer wall of the jetty portion or to this. The punching line, which is formed within the width of the connecting band and which extends along a straight line on one side of the container lid, is perforated so as to form a rotatable opening / closing base, and the other punching lines are easily formed. The plastic container according to claim 1, wherein the plastic container is punched with several joints left so that it can be separated. 3. The container lid is provided with a punching line and a hinge forming portion, which are intermittently arranged for forming an opening / closing lid piece, on a peripheral edge of the lid, and the punching line and the hinge forming portion are formed on the jetty portion. It is formed within the width of the lower end of the outer wall or the connecting band connected to this, and the punching line is punched with several joints left so that it can be easily separated. The plastic container according to claim 1. 4. The plastic container according to claim 2, wherein the seam is 0.5 to 2.5 mm. 5. The thickness of the container lid is 0.05 to 1.0.
It is in the range of mm, The plastic container in any one of Claim 1 thru | or 4 characterized by the above-mentioned.