JP2000006941A - Synthetic resin sheet container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin sheet container wherein adhesion properties between a container body and a lid may be complete, the lid can be easily and conveniently removed, and a packaged state of an article during a step of packaging or a distribution process can be stabilized. SOLUTION: A first structure is a synthetic resin sheet container comprising a synthetic resin sheet material which is formed in a bulging manner, and it includes a flange 1 for forming an upper end rim and an article housing recess 2 surrounded by a side wall 3 and a bottom 4 wherein a rib 5 continuously surrounding along an upper face of the flange 1 and also protruding toward an upper part of the container is formed. A second structure comprises the flange 1 for forming the upper end rim and the article housing recess 2 surrounded by the side wall 3 and the bottom 4, wherein a flat face 6 to be a bottommost face of the article housing recess 2 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of bulging a synthetic resin sheet material having a structure having a recess for accommodating goods and having an open upper surface, which is well known as a container for natto, side dishes and the like. The present invention relates to a container comprising:

[0002]

2. Description of the Related Art As an example of a conventional container formed by swelling such a synthetic resin sheet material, the container shown in FIGS. The product accommodating recess 2 is continuous with the flange portion 1, and the product accommodating recess 2 includes a side wall 3 and a bottom 4. Usually, a corrugate 7 for reinforcement is formed on the side wall 3 and the bottom 4. In particular, the bottom portion 4 is formed with a flat portion 8 which is raised toward the inside of the container so as to be convenient for sticking a seal band for quality indication or the like.

[0003] In the conventional packaging method of a product in a molded container using this kind of synthetic resin sheet material, a product 12 is accommodated in the product accommodating recess 2 and then a lid 9 made of a synthetic resin film is attached to the container. By thermocompression bonding to the flange portion 1, the lid is closed, and the primary packaging is completed. Next, as shown in FIG. 13 as an example, the product for which the primary packaging has been completed includes a plurality of packs (three packs in the figure) and a seal band 1.
0 is wound in a belt shape and put together into a secondary package (stacked package), which is a final form product that can be distributed.

[0004]

In the above-described packaging method using a conventional packaging container, the lid 9 and the flange portion 1 of the container are thermocompression-bonded with a considerable area and a flat surface, so that both sides are uniformly formed. However, there is a disadvantage that the content leaks out when the content is not perfect and the content contains a large amount of liquid, such as in the packaging of tofu. Also, at the stage of the secondary packaging, when the ends of the seal band 10 for the pack are connected to each other on the outer surface of the bottom of the container to form a ring, the center of the bottom of the container is inward of the container at the position of the flat recess 8. Because it is concave toward
The connecting portion of the seal band 10 is in a state of being lifted from the container, and there is a problem to be solved such that the seal band 10 moves at the stage of distribution and the packed primary package falls off.

[0005] In view of the above, the present invention has been devised with a view to solving the problems of the prior art described above, and has been devised with respect to the shape of the container so as to make the adhesion between the container body and the lid perfect and to facilitate the removal of the lid. An object of the present invention is to provide a container made of a synthetic resin sheet which is easy and can stably handle products in a packaging stage and a distribution process.

[0006]

The construction of the container made of a synthetic resin sheet of the present invention, which has been adopted as a means for achieving the object, will be described with reference to the names and signs of the respective parts of the embodiments. The structure is a container made of a synthetic resin sheet, which is a container made of a synthetic resin sheet obtained by bulging a synthetic resin sheet material, and is surrounded by a flange 1 forming an upper end edge, a side wall 3 and a bottom 4. A rib 5 is formed of the product accommodating recess 2 and continuously makes a round along the upper surface of the flange portion 1 and protrudes upward from the container. Also, the second
The container is a container made of the synthetic resin sheet, and includes a flange portion 1 forming an upper edge portion, and a product accommodating concave portion 2 surrounded by a side wall 3 and a bottom portion 4. A flat surface 6 which is the lowermost surface of the product accommodating recess 2 is formed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In carrying out the present invention,
The synthetic resin sheet material is shaped by blow molding. By forming the blow mold in a shape corresponding to the structure of the above-described embodiment, it is possible to mold the container exactly in the same manner as a conventional container. As the synthetic resin sheet material, PET (polyester), polycarbonate, polystyrene, or the like can be used. In particular, the use of PET makes it possible to recycle the material resin, which not only contributes to resource saving activities, but also does not hurt the incinerator because of the low heat of combustion when it is incinerated. Has a beneficial effect on environmental pollution countermeasures such as not emitting methane.

As a modified example of the above-described container, a PP (stretched or non-stretched polypropylene resin) sheet 11 on which a product content, a display mark and the like are printed can be laminated on a PET sheet and formed. This modified example not only increases the degree of recognition of the product to the customer, but also stacks a plurality of packaged products and sells the product, so that the laminated PP sheet 11 acts as a non-slip,
In the distribution process, the stacked and packaged products do not slip each other and jump out to the side to break the stacked and packed state.

The rib 5 formed on the upper surface of the flange portion 1 in the container made of a synthetic resin sheet (hereinafter simply referred to as a container) of the present invention first prevents the deformation of the flange portion 1 before the packaging step. Has a reinforcing effect, and the rib 5
And the lid 9 made of a synthetic resin film are continuously thermocompression-bonded without any gap to keep the inside of the container in a completely airtight state. Further, when the lid 9 is opened, the end of the lid 9 is easily picked up and peeled off. The lid 9 must be easily peeled off without tearing. To this end, the rib 5 is formed over the entire circumference at a position close to the center of the container on the upper surface of the flange portion 1 in order to secure a margin for opening when the lid is opened. It is formed so as to protrude upward.
Also, the width of the protrusion is smaller than the width of the flange portion 1,
At the time of thermocompression bonding, a sufficient pressing force is applied to the lid 9,
The protruding height is set so that a gap remains between the outer peripheral portion of the flange portion 1 and the outer peripheral portion of the lid 9 after crimping.

[0010] A flat surface 6 is formed near the center of the bottom surface 4 of the container of the embodiment so as to be the bottom surface of the product accommodating recess 2. The end portion of the pack seal band 10 can be easily and reliably adhered to the flat surface 6 by means such as an adhesive or heat fusion, and the once adhered seal band is not easily peeled off. In the case where a plurality of products are packed and sold as described above, the stacked and packaged products do not slip off each other and jump out to the side to break the stacked and packaged state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on illustrated embodiments. FIG. 1 is a perspective view of a first embodiment of a container made of a synthetic resin sheet of the present invention, and FIGS. 2, 3, 4 and 5 show a first embodiment shown in FIG.
Plan view, front view, AA line sectional view, BB of the embodiment, respectively.
FIG. 6 is a front view of a state where three packages are packed, FIG. 7 is an explanatory view of a crimped state of the lid 9 of the first embodiment, FIG. 8 is an explanatory view of a seal band portion, and FIG. It is a perspective view of a modification of a container.

FIGS. 1 to 5 show the outer shape of the first embodiment. The container of the first embodiment is made of PET, and the lid 9 is shown by phantom lines in FIG. The shapes of the rib 5 and the flat surface 6 are shown in the sectional views of FIGS. FIG. 7 also shows a state in which the rib 5 and the lid 9 are crimped, and shows a state in which a margin 9a of the lid 9 is provided. FIG. 8 shows the relationship between the container and the seal band 10 in the packed state, and shows the relationship between the end of the seal band 10 and the flat surface 6 of the bottom surface 4 of the container.

FIG. 9 shows a modification of the first embodiment.
Are formed near the inner periphery of the upper surface of the flange portion 1. The corrugation shape for reinforcement of the side surface 3 and the bottom surface 4 of the container is changed, but a flat surface 6 is formed in the center of the bottom surface 4. Also, in the modification example, a state in which the PP sheet 11 is laminated on a basic synthetic resin sheet is shown.

FIG. 10 shows a second embodiment in which the ribs 5 are formed only on the upper surface of the flange portion 1 and the side surfaces 3 are conical surfaces. Corrugations for reinforcement of the side surface 3 and the bottom surface 4 of the container are omitted. In the second embodiment, the ribs 5 are formed only on the upper surface of the flange portion 1.
Needless to say, an embodiment in which only the flat surface 6 serving as the lowermost surface is formed is included in the embodiment.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, but includes the structural requirements according to the present invention and refers to the present invention. The present invention can be implemented by appropriately modifying it within the range of achieving the object and having the following effects.

[0016]

As is clear from the above description, the first structure of the synthetic resin sheet container of the present invention is formed by continuously forming narrow ribs projecting upward on the flange portion of the container. Since the lid and the lid are pressed against each other to close the lid, the lid and the lid are continuously thermocompression-bonded without any gap when the lid is closed, so that the inside of the container is securely held in a completely airtight state. As a result, there is a remarkable effect that the quality keeping period of the content product can be greatly extended. In addition, there is an effect that the end of the lid is easily picked when the lid is opened, and the lid is easily and reliably peeled without tearing at the time of peeling. Further, the rib has a reinforcing effect and has an effect of preventing deformation of the flange portion before the packaging process.

In the second configuration, when a plurality of packaged products are stacked and packed by a seal band and sold, a flat surface is formed on the bottom surface of the container so as to be the lowest bottom surface of the product accommodating recess. Therefore, the end of the seal band for the pack can be easily and securely adhered to the flat surface by means of an adhesive or heat fusion, and the seal band once adhered can be easily peeled off. As described above, when a plurality of products are packed and sold as described above, the stacked and packaged products do not slip out of each other and jump out to the side to break the stacked and packed condition.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a front view of the first embodiment.

FIG. 4 is a sectional view taken along line AA of the first embodiment.

FIG. 5 is a sectional view taken along line BB of the first embodiment.

FIG. 6 is an explanatory partial cross-sectional view showing a packed state of the first embodiment.

FIG. 7 is an explanatory partial cross-sectional view showing the closed state of the first embodiment.

FIG. 8 is a partial cross-sectional view for illustrating a packed state of the first embodiment.

FIG. 9 is a perspective view of a modification of the first embodiment.

FIG. 10 is a perspective view of a second embodiment.

FIG. 11 is a perspective view showing a conventional container and a lid.

FIG. 12 is a front sectional view of a conventional example.

FIG. 13 is a partial cross-sectional view for explanation illustrating a pack state of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flange part 2 Commodity accommodating recess 3 Side wall 4 Bottom part 5 Rib 6 Flat surface 7 Corrugation for reinforcement 8 Flat part 9 Lid body 10 Seal band 11 PP sheet for lamination 12 Product

[Procedure amendment]

[Submission date] May 31, 1999 (1999.5.3
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Container made of synthetic resin sheet

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of bulging a synthetic resin sheet material having a structure having a recess for accommodating goods and having an open upper surface, which is well known as a container for natto, side dishes and the like. The present invention relates to a container comprising:

[0002]

2. Description of the Related Art As an example of a conventional container formed by bulging such a synthetic resin sheet material, the container shown in FIGS. The product accommodating recess 2 is continuous with the flange portion 1, and the product accommodating recess 2 includes a side wall 3 and a bottom 4. Usually, a corrugate 7 for reinforcement is formed on the side wall 3 and the bottom 4. In particular, the bottom portion 4 is formed with a flat portion 8 which is raised toward the inside of the container so as to be convenient for sticking a seal band for quality indication or the like.

[0003] In the conventional packaging method of a product in a molded container using this kind of synthetic resin sheet material, a product 12 is accommodated in the product accommodating recess 2 and then a lid 9 made of a synthetic resin film is attached to the container. By thermocompression bonding to the flange portion 1, the lid is closed, and the primary packaging is completed. Next, as shown in FIG. 12 , as an example, the product for which the primary packaging has been completed is formed of a plurality of packs (three packs in the figure) and a seal band 1.
0 is wound in a belt shape and put together into a secondary package (stacked package), which is a final form product that can be distributed.

[0004]

In the above-described packaging method using a conventional packaging container, the lid 9 and the flange portion 1 of the container are thermocompression-bonded with a considerable area and a flat surface, so that both sides are uniformly formed. However, there is a disadvantage that the content leaks out when the content is not perfect and the content contains a large amount of liquid, such as in the packaging of tofu. Also, at the stage of the secondary packaging, when the ends of the seal band 10 for the pack are connected to each other on the outer surface of the bottom of the container to form a ring, the center of the bottom of the container is inward of the container at the position of the flat recess 8. Because it is concave toward
The connecting portion of the seal band 10 is in a state of being lifted from the container, and there is a problem to be solved such that the seal band 10 moves at the stage of distribution and the packed primary package falls off.

[0005] In view of the above, the present invention has been devised with a view to solving the problems of the prior art described above, and has been devised with respect to the shape of the container so as to make the adhesion between the container body and the lid perfect and to facilitate the removal of the lid. An object of the present invention is to provide a container made of a synthetic resin sheet which is easy and can stably handle products in a packaging stage and a distribution process.

[0006]

The structure of the container made of a synthetic resin sheet of the present invention, which is employed as a means for achieving the object, will be described with reference to the names and signs of the respective parts in the embodiments. The sheet container is a container made of a synthetic resin sheet obtained by swelling a synthetic resin sheet material, and is a product accommodating recess 2 surrounded by a flange 1 forming an upper end edge, a side wall 3 and a bottom 4. A flat surface 6 which is the lowermost surface of the product accommodating recess 2 is formed at the center of the bottom 4.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In carrying out the present invention,
The synthetic resin sheet material is shaped by blow molding. By forming the blow mold in a shape corresponding to the structure of the above-described embodiment, it is possible to mold the container exactly in the same manner as a conventional container. As the synthetic resin sheet material, PET (polyester), polycarbonate, polystyrene, or the like can be used. In particular, the use of PET makes it possible to recycle the material resin, which not only contributes to resource saving activities, but also does not hurt the incinerator because of the low heat of combustion when it is incinerated. Has a beneficial effect on environmental pollution countermeasures such as not emitting methane.

As a modified example of the above-described container, a PP (stretched or non-stretched polypropylene resin) sheet 11 on which a product content, a display mark and the like are printed can be laminated on a PET sheet and formed. This modified example not only increases the degree of recognition of the product to the customer, but also stacks a plurality of packaged products and sells the product, so that the laminated PP sheet 11 acts as a non-slip,
In the distribution process, the stacked and packaged products do not slip each other and jump out to the side to break the stacked and packed state.

The rib 5 formed on the upper surface of the flange portion 1 in the container made of a synthetic resin sheet (hereinafter simply referred to as a container) of the present invention first prevents the deformation of the flange portion 1 before the packaging step. Has a reinforcing effect, and the rib 5
And the lid 9 made of a synthetic resin film are continuously thermocompression-bonded without any gap to keep the inside of the container in a completely airtight state. Further, when the lid 9 is opened, the end of the lid 9 is easily picked up and peeled off. The lid 9 must be easily peeled off without tearing. To this end, the rib 5 is formed over the entire circumference at a position close to the center of the container on the upper surface of the flange portion 1 in order to secure a margin for opening when the lid is opened. It is formed so as to protrude upward.
Also, the width of the protrusion is smaller than the width of the flange portion 1,
At the time of thermocompression bonding, a sufficient pressing force is applied to the lid 9,
The protruding height is set so that a gap remains between the outer peripheral portion of the flange portion 1 and the outer peripheral portion of the lid 9 after crimping.

[0010] A flat surface 6 is formed near the center of the bottom surface 4 of the container of the embodiment so as to be the bottom surface of the product accommodating recess 2. The end portion of the pack seal band 10 can be easily and reliably adhered to the flat surface 6 by means such as an adhesive or heat fusion, and the once adhered seal band is not easily peeled off. In the case where a plurality of products are packed and sold as described above, the stacked and packaged products do not slip off each other and jump out to the side to break the stacked and packaged state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on illustrated embodiments. FIG. 1 is a perspective view of a first embodiment of a container made of a synthetic resin sheet of the present invention, and FIGS. 2, 3, 4 and 5 show a first embodiment shown in FIG.
Plan view, front view, AA line sectional view, BB of the embodiment, respectively.
FIG. 6 is a front view of a state where three packages are packed, FIG. 7 is an explanatory view of a crimped state of the lid 9 of the first embodiment, FIG. 8 is an explanatory view of a seal band portion, and FIG. It is a perspective view of a modification of a container.

FIGS. 1 to 5 show the outer shape of the first embodiment. The container of the first embodiment is made of PET, and the lid 9 is shown by phantom lines in FIG. The shapes of the rib 5 and the flat surface 6 are shown in the sectional views of FIGS. FIG. 7 also shows a state in which the rib 5 and the lid 9 are crimped, and shows a state in which a margin 9a of the lid 9 is provided. FIG. 8 shows the relationship between the container and the seal band 10 in the packed state, and shows the relationship between the end of the seal band 10 and the flat surface 6 of the bottom surface 4 of the container.

FIG. 9 shows a modification of the first embodiment.
Are formed near the inner periphery of the upper surface of the flange portion 1. The corrugation shape for reinforcement of the side surface 3 and the bottom surface 4 of the container is changed, but a flat surface 6 is formed in the center of the bottom surface 4. Also, in the modification example, a state in which the PP sheet 11 is laminated on a basic synthetic resin sheet is shown.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, but includes the structural requirements of the present invention and refers to the present invention. The present invention can be implemented by appropriately modifying it within the range of achieving the object and having the following effects.

[0015]

As is apparent from the above description, the construction of the container made of synthetic resin sheet of the present invention is not limited to the case where a plurality of wrapped products are stacked and packed by a seal band and sold. Since the flat surface is formed so as to be the bottom surface of the product accommodating recess, the end of the pack seal band is easily and securely bonded to the flat surface by means of an adhesive or heat fusion. Since the seal band once bonded is not easily peeled off, as described above, when packing and selling a plurality,
There is no possibility that the stacked and wrapped products slip out of each other and jump out to the side to break the stacked and wrapped state.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a front view of the first embodiment.

FIG. 4 is a sectional view taken along line AA of the first embodiment.

FIG. 5 is a sectional view taken along line BB of the first embodiment.

FIG. 6 is an explanatory partial cross-sectional view showing a packed state of the first embodiment.

FIG. 7 is an explanatory partial cross-sectional view showing the closed state of the first embodiment.

FIG. 8 is a partial cross-sectional view for illustrating a packed state of the first embodiment.

FIG. 9 is a perspective view of a modification of the first embodiment.

FIG. 10 is a perspective view showing a conventional container and a lid .

FIG. 11 is a front sectional view of a conventional example .

FIG. 12 is a partial cross-section for explanation showing a pack state of a conventional example .
FIG .

[Description of Signs] 1 Flange part 2 Commodity accommodating recess 3 Side wall 4 Bottom part 5 Rib 6 Flat surface 7 Corrugation for reinforcement 8 Flat part 9 Lid 10 Seal band 11 PP sheet for lamination 12 Product

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 10

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 11

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Deleted

Claims (3)

[Claims] 1. A container made of a synthetic resin sheet obtained by bulging a synthetic resin sheet material, wherein the container is surrounded by a flange portion (1) forming an upper edge, a side wall (3) and a bottom portion (4). Synthetic resin comprising a product accommodating concave portion (2), and a narrow rib (5) that is continuous over the entire circumference on the upper surface of the flange portion (1) and protrudes upward from the container. Sheet container. 2. A container made of a synthetic resin sheet obtained by bulging a synthetic resin sheet material, wherein the container is surrounded by a flange portion (1) forming an upper end edge, a side wall (3) and a bottom portion (4). The bottom portion (4) is formed in an uneven shape, and a flat surface (6) serving as the bottom surface of the product storage recess (2) is formed in a part of the bottom portion (4). Made of synthetic resin sheet. 3. The synthetic resin sheet container according to claim 1, wherein the synthetic resin sheet material is a polyethylene terephthalate resin (PET) sheet material.