JP7528809B2 - Lid material and container using same - Google Patents

Description

The present invention relates to a lid material and a container in which the lid material is fitted onto the container body.

A conventional container for yogurt, etc. is disclosed in Patent Document 1. This container comprises a container body, an inner lid, and an outer lid. The container body is made of paper with polyethylene on the inside side of the paper, and is formed into a bottomed cylindrical shape with a flange around the mouth. The inner lid is made of laminated paper with polyethylene on the inside side of the paper, and is thermally bonded to the flange. The outer lid is made of a resin molded product, and fits onto the flange of the container body.

The contents can be removed by removing the outer lid and peeling the inner lid off the flange. The outer lid can also be closed to store the container with the remaining contents.

Jitsuzen No. 57-140384 (pages 3-10, Figure 9)

However, the above-mentioned conventional containers have an outer lid made from a resin molded product, which creates a large environmental burden.

The objective of the present invention is to provide a container that can reduce the environmental impact.

In order to achieve the above object, the lid material according to the present invention is fitted onto a bottomed cylindrical container body. The lid material has a first resin sheet and a paper mount part, a part of which is fixed to the first resin sheet. The mount part has a pair of outer plate parts fixed to the first resin sheet with a gap therebetween, and an inner plate part arranged between the pair of outer plate parts and separably held by at least one of the first resin sheet and the outer plate parts. Each of the pair of outer plate parts has a protrusion protruding in a direction facing each other. The inner plate part has a cut part with an inward recess at both ends in a direction intersecting the facing direction of the pair of outer plate parts. The protrusion part is separable from the first resin sheet.

With this configuration, a single lid material can be used both for the initial sealing (conventional inner lid) and the resealing (conventional outer lid). This reduces the number of parts, and by eliminating the outer lid, which is a resin molded product, the environmental impact can be reduced.

The present invention also provides a lid material having the above-mentioned configuration, in which a break line is disposed between the outer plate portion and the inner plate portion, the break line penetrating the backing portion and having a connecting portion that does not penetrate the outer plate portion and connects the inner plate portion, and the inner plate portion and the outer plate portion can be separated by breaking the break line.

In the lid material of the present invention having the above configuration, the inner plate portion is held by a release agent layer disposed between the inner plate portion and the first resin sheet.

In the lid material of the present invention having the above configuration, the protrusion is not adhered to the first resin sheet.

In addition, in the lid material of the present invention having the above configuration, the convex portion is held by a release agent layer disposed between the lid material and the first resin sheet.

In addition, in the lid material of the present invention having the above-mentioned configuration, the multiple protrusions include a pair of protrusions arranged opposite each other.

The present invention also provides a container having a lid material of the above configuration, comprising a bottomed cylindrical container body onto which the lid material is fitted, and a second resin sheet sealed to a flange portion extending outward from an opening at the top of the container body. At least a portion of each of the protrusions and at least a portion of the notches simultaneously engage with the underside of the flange portion, thereby holding the lid material to the container body.

The present invention provides a container that reduces the environmental impact.

FIG. 1 is a plan view of an example of a container having a lid material according to the present invention. 2 is a cross-sectional view of the container shown in FIG. 1 taken along line II-II. FIG. 4 is an enlarged cross-sectional view of the long side of the lid material and flange portion of the container. FIG. 4 is an enlarged cross-sectional view of a short side portion of the lid material and flange portion of the container. FIG. FIG. 2 is an enlarged cross-sectional view of the container with the lid removed. 11 is an enlarged cross-sectional view of the container when the second resin sheet is opened. FIG. 10 is an enlarged cross-sectional view of the cover material when the outer plate portion and the first resin sheet are attached. FIG. 4 is an enlarged cross-sectional view of a container having an outer plate portion and a first resin sheet attached thereto; FIG. 11 is an enlarged cross-sectional view of the container when the inner plate portion is attached from above the first resin sheet. FIG. 10 is an enlarged cross-sectional view of a container in which an inner plate portion is attached from above a first resin sheet. FIG.

A container 100 having a lid material 20 according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an example of a container 100 having a lid material 20 according to the present invention. FIG. 2 is a cross-sectional view of the container 100 shown in FIG. 1 taken along line II-II. FIG. 3 is an exploded perspective view of the container 100. In FIGS. 1 and 3, the adhesion state between the first resin sheet 30 and the fixing portion 414 of the outer plate portion 41 of the mount portion 40 is shown with cross-hatching. In this specification, the direction of gravity is described as downward, and the opposite direction is described as upward.

<Container 100>
As shown in Fig. 1, the container 100 has a container body 10 and a lid material 20. A content S (see Fig. 2, etc.) is contained inside the container 100. Here, the content S is assumed to be food (e.g., gel-like such as yogurt, jelly, jam, etc.), but is not limited to this. For example, the content S may be powdered food such as salt, sugar, spices, or solid food such as processed meat. In addition, the content S may contain lubricants such as grease, hair styling products, fragrances, wet wipes, or other non-food contents S.

<Container body 10>
The container body 10 has a bottomed cylindrical shape capable of accommodating the contents S in the internal storage space 10S. In the container 100 of this embodiment, the container body 10 may have, for example, a paper base material and an internal coating layer having water resistance, gas barrier properties, etc. Examples of the water-resistant coating layer include a resin layer made of polyethylene (PE), polyethylene terephthalate (PET), etc. Examples of the gas-barrier coating layer include an aluminum layer.

The container body 10 may be formed from a thermoplastic resin such as polypropylene (PP) or polystyrene (PS). The container body 10 is not limited to these resins, and a wide variety of resins that are easy to mold can be used. When the container 100 is used to store food, at least the inner surface of the container body 10 is made of a material that is non-toxic or nearly non-toxic to the human body.

As shown in Figs. 1 and 2, the container body 10 has a bottom 11, a side wall 12, and a flange 13. The side wall 12 is cylindrical and extends vertically. The lower part of the side wall 12 is closed by the bottom 11. In other words, the container body 10 is cylindrical with a bottom. An opening 14 is formed at the upper end of the side wall 12 for inserting and removing the contents S contained inside the storage space 10S. The opening 14 faces the bottom 11 vertically. As shown in Fig. 2, the opening 14 is larger than the bottom 11, but is not limited to this.

The side wall 12 is formed by bending a single plate-like member into a ring shape and gluing both ends. The side wall 12 extends vertically, and the bottom 11 is fixed at a position shifted upward from the lower end (see FIG. 2). This configuration increases the rigidity of the bottom 11. Note that if the container body 10 is an integrally molded resin body, the bottom 11 may be connected to the lower end of the side wall 12. The flange 13 extends outward from the upper end of the side wall 12. In other words, the flange 13 is positioned outside the opening 14.

In the container body 10, the outer shape of the bottom 11, the outer and inner shapes of the side wall 12 (the outer shape of the opening 14), and the outer shape of the flange 13 are all roughly rectangular (assumed to be roughly rectangular here, but may be roughly elliptical, etc.) with curved corners and two adjacent straight lines in a plan view, and are roughly similar to each other. However, they are not limited to this and may be circular or roughly regular polygonal.

<Covering material 20>
The lid material 20 will be described with reference to the drawings. FIG. 4 is an enlarged cross-sectional view of the lid material 20 of the container 100 and the long side portion 401 of the flange portion 13. FIG. 5 is an enlarged cross-sectional view of the lid material 20 of the container 100 and the short side portion 402 of the flange portion 13. Hereinafter, the description will be made with reference to the mount portion 40 shown in FIG. 1, with the direction along the long side portion 401 being the longitudinal direction and the direction along the short side portion 402 being the transverse direction. The lid material 20 is disposed on the upper portion of the container body 10 and fitted to the container body 10. As shown in FIG. 3, FIG. 4, etc., the lid material 20 has a first resin sheet 30 and a mount portion 40.

For example, fine paper, craft paper, imitation paper, coated paper, etc. are used as the mount part 40. The basis weight of the mount part 40 can be, for example, 100 g/m ² to 500 g/m ^2. The mount part 40 has a higher rigidity than the first resin sheet 30, and by providing the mount part 40, it becomes possible to arrange the containers 100 in a stacked manner.

The mount portion 40 has a pair of outer plate portions 41 and an inner plate portion 42. A printed layer (not shown) may be provided on the upper surfaces of the outer plate portion 41 and the inner plate portion 42. The printed layer forms information about the contents S contained inside the storage space 10S of the container body 10, a product image, etc. If printing is not required, the printed layer may be omitted. In a plan view, the mount portion 40 is approximately rectangular with curved corners.

The outer plate portion 41 constitutes the long side portion 401 of the mount portion 40. As shown in Figures 1 and 3, the outer plate portion 41 is an elongated member extending in the longitudinal direction of the mount portion 40, and the pair of outer plate portions 41 are arranged approximately parallel to each other with a gap in the short side direction of the mount portion 40. Each of the pair of outer plate portions 41 has a protrusion 412 that protrudes inward from the inner sides 411 facing each other.

In a plan view, the inner side 411 is straight, and the convex portion 412 is curved and bulges inward. As shown in Figs. 1 and 3, the curved shape of the convex portion 412 is an arc. However, this is not limited to this, and it may be, for example, an elliptical arc, a trapezoid, a triangle, etc.

The ends of the curved portion of the convex portion 412 are disposed outside the inner side 411 of the outer plate portion 41. That is, the convex portion 412 is formed from the middle portion in the width direction of the outer plate portion 41 in a plan view. By configuring it in this way, when the outer plate portion 41 is curved, the ends of the convex portion 412 can be moved outward compared to when they protrude only from the inner circumference. Note that, if the convex portion 412 can be sufficiently widened when the outer plate portion 41 is curved, both ends of the convex portion 412 may be formed continuous with the inner side 411.

A small arc portion with a radius smaller than the radius of the curved portion is connected to both ends of the curved portion of the protrusion 412. By configuring it in this way, the length of the connection portion between the protrusion 412 and the outer plate portion 41 can be shortened, and the amount of deformation of the protrusion 412 can be increased.

As shown in FIG. 1, the inner plate portion 42 is disposed between a pair of outer plate portions 41 that are disposed at a distance in the short side direction. The pair of outer plate portions 41 are adjacent to both ends of the inner plate portion 42 in the short side direction. In other words, both ends of the inner plate portion 42 in the short side direction are shaped to fit into the outer plate portions 41.

The inner plate portion 42 has a pair of inwardly recessed notches 421 at both ends in the longitudinal direction, i.e., at both ends in the direction intersecting (here, perpendicular to) the direction in which the pair of outer plate portions 41 face each other. The pair of notches 421 are symmetrical with respect to the longitudinal center line of the inner plate portion 42.

In a plan view, each of the pair of cutouts 421 has a curved shape that bulges inward. As shown in Figures 1 and 3, the curved shape of the pair of cutouts 421 is an arc. However, this is not limited to this, and the shape may be, for example, an elliptical arc, a trapezoid, a triangle, etc. When the longitudinal end of the inner plate portion 42 is bent inward, the cutouts 421 protrude in the opposite direction to the bending direction, and the tips spread outward.

A small arc portion with a radius smaller than the radius of the curved portion is connected to both ends of the pair of cuts 421. This configuration prevents stress concentration at the end of the cut 421 when the longitudinal end of the inner plate 42 is bent, and prevents the end of the cut 421 from being torn and becoming longer.

A break line 43 is disposed between the outer plate portion 41 and the inner plate portion 42 of the mount portion 40, penetrating in the thickness direction. By forming the break line 43 in the mount portion 40, the outer plate portion 41 and the inner plate portion 42 are formed.

The break line 43 has a connection portion 431. The connection portion 431 is a portion where the outer plate portion 41 and the inner plate portion 42 are connected. In other words, the connection portion 431 is a discontinuous portion of the break line 43, and is a so-called blade retaining portion. Note that the connection portion 431 is shown as a solid dot in FIG. 1, but in reality, it is a portion where the outer plate portion 41 and the inner plate portion 42 are connected, and is not limited to a dot shape. The outer plate portion 41 and the inner plate portion 42 are connected by the connection portion 431. Then, by cutting the connection portion 431 in the backing portion 40, the outer plate portion 41 and the inner plate portion 42 are separated along the break line 43.

The connection parts 431 are of a size that allows them to be easily cut without using a tool such as a blade when separating the inner plate part 42 from the outer plate part 41 at the break line 43. In the lid material 20, the connection parts 431 are provided at each corner of the inner plate part 42. However, this is not limited to this, and the number is not limited to four as long as the outer plate part 41 and the inner plate part 42 can be connected. In order to stably support the inner plate part 42 with the outer plate part 41, it is preferable that at least two connection parts 431 are provided between one of the outer plate parts 41 and the inner plate part 42, and it is preferable that they are provided in a position that is unlikely to interfere with the protrusions 412.

As shown in Figures 2 and 3, the first resin sheet 30 is disposed on top of the mount portion 40. Examples of the first resin sheet 30 include films such as polyethylene (PE) resin film and polyethylene terephthalate (PET) resin film, or laminates thereof. In a plan view, the outer shape of the first resin sheet 30 is the same as the outer shape of the mount portion 40, i.e., a substantially rectangular shape.

The outer plate portion 41 has a fixing portion 414 on the outer side of the convex portion 412 on the upper surface. The fixing portion 414 is fixed to the lower surface of the first resin sheet 30. The fixing portion 414 and the first resin sheet 30 can be fixed to each other by, for example, adhesion with an adhesive, but is not limited to this. For example, any fixing method that can firmly fix the outer plate portion 41 to the first resin sheet 30, such as heat sealing, can be widely used. The lid material 20 has the configuration shown above.

As shown in Figures 2 and 3, the container 100 has a second resin sheet 50 that covers the upper end of the container body 10 and is sealed to the flange portion 13 to seal the storage space 10S of the container body 10. As the second resin sheet 50, a wide variety of resin films or laminates thereof having the functions necessary for sealing, such as sealing properties, water resistance, and gas barrier properties, can be used, such as PE resin and PE resin film, PET resin film, or laminates thereof. The second resin sheet 50 is sealed to the flange portion 13 by, for example, heat sealing, but a sealing method other than heat sealing may also be used.

As shown in Figures 2 to 4, in the container 100, the second resin sheet 50 is heat-sealed and sealed while the contents S are contained in the storage space 10S of the container body 10. Then, the convex portion 412 of the outer plate portion 41 of the backing portion 40 is engaged with the underside of the flange portion 13 (see Figure 4), and the cut portion 421 of the inner plate portion 42 is engaged with the underside of the flange portion 13, thereby holding the lid material 20 in the container body 10. Note that the holding method of the lid material 20 is not limited to the above-mentioned holding method, and for example, it may be held by a release agent layer made of a release agent, or the above-mentioned holding methods may be combined.

Next, the operation of opening and resealing the container 100 will be described with reference to the drawings. FIG. 6 is an enlarged cross-sectional view of the container 100 with the lid 20 removed. FIG. 7 is an enlarged cross-sectional view of the container 100 when the second resin sheet 50 is being opened. FIG. 8 is an enlarged cross-sectional view of the lid 20 when the outer plate portion 41 and the first resin sheet 30 are attached. FIG. 9 is an enlarged cross-sectional view of the container 100 with the outer plate portion 41 and the first resin sheet 30 attached. FIG. 10 is an enlarged cross-sectional view of the container 100 when the inner plate portion 42 is attached from above the first resin sheet 30. FIG. 11 is an enlarged cross-sectional view of the container 100 with the inner plate portion 42 attached from above the first resin sheet 30.

In the following description, the act of attaching the lid material 20 to re-close the opening 14 of the container body 10 that has been opened by peeling the second resin sheet 50 off the flange portion 13 is referred to as resealing.

As shown in Figures 4 and 5, in the container 100, the second resin sheet 50 is sealed to the upper surface of the flange portion 13 of the container body 10, thereby sealing the opening 14 of the container body 10. In this way, by sealing the second resin sheet 50 to the flange portion 13, the lid material 20 closes the opening 14 of the container body 10 and seals the storage space 10S.

This prevents moisture, dust, dirt, and other foreign matter from entering the storage space 10S, making it possible to maintain a hygienic state when sealed. It also prevents air, water vapor, and other gases from within the storage space 10S from escaping to the outside. This prevents the contents S from drying out, and also prevents odors from leaking to the outside or being transferred to the contents S.

In the container 100, the lid material 20 is attached to the container body 10 by engaging the convex portion 412 of the outer plate portion 41 with the underside of the flange portion 13 and engaging the notch portion 421 of the inner plate portion 42 with the underside of the flange portion 13.

As shown in FIG. 6, the lid material 20 is removed from the container body 10. More specifically, the lid material 20 is separated from the container body 10 by releasing the engagement between the convex portion 412 and the notch portion 421 and the underside of the flange portion 13 (see FIG. 6).

As shown in FIG. 7, the second resin sheet 50 is separated from the container body 10. In the container 100 of this embodiment, one of the corners of the second resin sheet 50 has a curved portion with a smaller radius than the other corners, which is formed as a gripping portion 51 (see FIGS. 1 and 3). By pinching the gripping portion 51 and lifting it upward, the second resin sheet 50 is separated (peeled) from the flange portion 13 of the container body 10, and the container body 10 is opened.

By opening the container body 10, the contents S stored inside the storage space 10S of the container body 10 can be removed to the outside through the opening 14. The second resin sheet 50 is completely removed from the flange portion 13 of the container body 10. If the second resin sheet 50 can be easily peeled off, the gripping portion 51 may be omitted. After the second resin sheet 50 is peeled off from the flange portion 13, the second resin sheet 50 is no longer necessary.

Depending on the contents S, the remaining contents may be stored in the storage space 10S. In such a case, the container body 10 is resealed with the lid 20 to close the opening 14.

Next, resealing of the container body 10 with the lid material 20 will be described with reference to the drawings. First, the lid material 20 is separated into the first resin sheet 30 and a pair of outer plate portions 41 and inner plate portions 42 fixed to the first resin sheet 30. More specifically, the connection portion 431 is cut, and the outer plate portion 41 and inner plate portion 42 are separated along the break line 43.

As shown in FIG. 8, the long side of the first resin sheet 30 is bent so that the outer side faces up. Since the protrusion 412 is not yet attached to the first resin sheet 30, the protrusion 412 moves downward as it separates from the first resin sheet 30.

The inner end of the convex portion 412 is positioned outside the flange portion 13 (see FIG. 8). The first resin sheet 30 with its outwardly bent in this manner is placed over the top of the container body 10. In this manner, the convex portion 412 can be moved downward from the outside of the flange portion 13. In this state, by returning the bent first resin sheet 30 to its original state with the first resin sheet 30 in contact with the upper surface of the flange portion 13, the end of the convex portion 412 is engaged with the lower surface of the flange portion 13 (see FIG. 9).

As a result, the opening 14 of the container body 10 is blocked by the first resin sheet 30. Then, the inner plate portion 42 is attached from above the first resin sheet 30. Specifically, the longitudinal end of the inner plate portion 42 is bent upward (see FIG. 10). At this time, the cut portion 421 of the inner plate portion 42 is not bent and moves downward.

The inner end of the cutout 421 is positioned outside the flange 13 (see FIG. 10). The inner plate 42 with the outwardly bent side is placed over the first resin sheet 30. As a result, the longitudinal end of the first resin sheet 30 is bent downward from the end of the flange 13 (see FIG. 10). Then, with the inner plate 42 in contact with the upper surface of the first resin sheet 30, the bent inner plate 42 is returned to its original state. As a result, the cutout 421 is engaged with the flange 13 together with the first resin sheet 30 that has been bent downward from the outside of the flange 13 (see FIG. 11).

In this way, the container body 10 that has been opened can be resealed with the lid material 20. When resealing, the pair of protrusions 412 are engaged with the long sides of the flange portion 13, and the pair of cutouts 421 are engaged with the short sides of the flange portion 13 together with the first resin sheet 30. In this way, by attaching the inner plate portion 42 to the flange portion 13 from above the first resin sheet 30, the pair of outer plate portions 41 are pulled by the first resin sheet 30 and pushed toward the center. As a result, the inner plate portion 42 disposed between the pair of outer plate portions 41 is pressed against the pair of outer plate portions 41. This prevents the lid material 20 from shifting when resealing, and prevents the lid material 20 from coming off.

The lid 20 is resealed with the first resin sheet 30 in contact with the flange portion 13. This prevents foreign matter such as water (liquid), dust, and dirt from entering the storage space 10S of the container body 10. This makes it possible to store the contents S even after opening while preventing the intrusion of foreign matter.

In addition, after the container body 10 has been resealed with the lid material 20, the lid material 20 can be removed from the container body 10 in the reverse order of attachment, i.e., the container 100 can be opened and resealed multiple times by using the lid material 20.

In addition, because the lid material 20 is resealable, the amount of resin waste can be reduced compared to a configuration that has a separate resin outer lid, thereby reducing the environmental burden.

The present invention is not limited to the above-mentioned configuration, and various modifications are possible. Configurations obtained by appropriately combining the technical means disclosed in different configurations are also included in the technical scope of the present invention.

The present invention can be used as a container that can hold food and other contents and has a lid that can be opened and closed multiple times.

REFERENCE SIGNS LIST 100 Container 10 Container body 10S Storage space 11 Bottom 12 Side wall 13 Flange 14 Opening 20 Lid 30 First resin sheet 40 Backing 401 Long side 402 Short side 41 Outer plate 411 Inner side 412 Convex 414 Fixing portion 42 Inner plate 421 Cut 43 Fracture line 431 Connection 50 Second resin sheet 51 Grip S Contents

Claims (7)

A lid material to be fitted onto a bottomed cylindrical container body,
A first resin sheet;
A paper mount portion, a portion of which is fixed to the first resin sheet,
The mount portion is
A pair of outer plate portions fixed to the first resin sheet with a gap therebetween;
an inner plate portion disposed between the pair of outer plate portions and separably held by at least one of the first resin sheet and the outer plate portions;
Each of the pair of outer plate portions has a protrusion protruding in a direction opposite to each other,
The inner plate portion has a notch portion having an inwardly recessed shape at both ends in a direction intersecting a direction in which the pair of outer plate portions face each other,
The protrusion is a lid member that is separable from the first resin sheet. A break line is disposed between the outer plate portion and the inner plate portion, the break line penetrating the mount portion and having a connection portion that does not penetrate the mount portion and connects the outer plate portion and the inner plate portion,
The lid according to claim 1 , wherein the inner plate portion and the outer plate portion are separable by breaking the break line. The lid material according to claim 1 or 2, wherein the inner plate portion is held by a release agent layer disposed between the inner plate portion and the first resin sheet. The lid material according to any one of claims 1 to 3, wherein the convex portion is not adhered to the first resin sheet. The lid material according to any one of claims 1 to 3, wherein the convex portion is held by a release agent layer disposed between the first resin sheet. The lid material according to any one of claims 1 to 5, wherein the plurality of protrusions include a pair of protrusions arranged opposite each other. A lid material according to any one of claims 1 to 6,
A bottomed cylindrical container body onto which the lid is fitted;
a second resin sheet that is sealed to a flange portion that extends outward from the upper opening of the container body;
A container characterized in that at least a portion of each of the protrusions and at least a portion of the notches simultaneously engage with the underside of the flange portion to hold the lid material to the container body.