JP7369964B2 - Container with medium plate - Google Patents

Description

The present invention relates to a container with an inner plate, and more particularly to a container with an inner plate that is suitable for storing food and has an inner plate between a container body and an upper lid.

BACKGROUND ART A container with an inner plate, which has an inner plate between the container body and the top lid, is known as a container used for take-out sales of beef bowls, Chinese bowls, curry rice, pasta dishes, and the like. A container with a medium plate stores cooked rice or noodles, soup, or stock in the container body, and the ingredients are stored in the medium plate, so that the cooked rice or noodles and the ingredients can be stored separately.

This type of container with an inner plate is known to have a tongue-shaped tab on the inner plate that extends outward from the outer edge of the inner plate and can be grasped with the tip of a finger so that the inner plate can be easily handled. (For example, Patent Document 1).

Japanese Patent Application Publication No. 7-315447

The above-mentioned container with an inner plate is attached to the container body together with the inner plate by external fitting, in which the upper lid is fitted to the outer edge of the container body from the outside with the outer edge of the inner plate sandwiched between the upper lid and the container body. In the case of a container with an inner plate, the upper lid sandwiches a tab between the upper lid and the container body, and the tab is bent downward from the outer edge of the inner plate and fits into the container body in an elastically deformed state.

For this reason, in a container with an inner plate that is externally fitted, the tab must be elastically deformed when fitting the top lid to the container body, and if the tab has high bending rigidity, a large force is required to fit it. Therefore, the workability of attaching the top lid to the container body becomes worse.

In addition, in a container with an inner plate that is externally fitted, when the top lid is fitted to the container body, the repulsive force due to the elastic deformation of the tab acts in the direction that the top lid comes off from the container body, so the top lid is fixed to the container body. The strength decreases, and the reliability of attachment of the upper plate to the container body decreases. In order to securely fix the top lid to the container body with the required strength, it is necessary to strengthen the fit between the top lid and the container body, which also makes it difficult to attach the top lid to the container body. .

The problem to be solved by the present invention is to avoid deteriorating the workability of attaching the top cover to the container body due to the tab provided on the inner plate in a container with an inner plate, and also to avoid the problem of attaching the top cover to the container body. The goal is to ensure that the

A container with an inner plate according to the present invention includes a container body (20) including an annular first outward flange portion (26) defining an upper opening; an inner plate (30) comprising an annular second outwardly facing flange portion (38) defining an outer edge (38A) substantially aligned with an outer edge (26A) of the first outwardly facing flange portion; and disposed on the inner plate; an upper lid main part (52) and an upper lid (50) including a cylindrical part (54) that hangs down from the outer edge of the upper lid main part and fits into the outer edge of the first outward flange part. (10), wherein the inner tray has a tab (40) extending outward from an outer edge of the second outward flange, and the tab extends outward from the outer edge of the second outward flange. At or near the boundary with the outer edge of the tab, there is a linear bent part (42) that is easier to bend and deform in the vertical direction than other parts of the tab.

According to this configuration, the tab provided on the inner tray does not impede the workability of attaching the top cover to the container body, and the top cover can be reliably attached to the container body.

In the container with an inner plate (10), preferably, the bent portion is provided in a straight line.

According to this configuration, the tab is easily bent, and the repulsive force due to elastic deformation of the tab does not become large.

In the container with an inner plate (10), preferably, the first outward flange portion has a curved contour, and the bent portion extends along the curved contour.

According to this configuration, the ease of bending the tab is adjusted by the curvature of the bending portion, and the airtightness between the container body and the top lid is improved.

In the container with an inner plate (10), preferably, the bent portion includes a plurality of holes linearly arranged at predetermined intervals.

According to this configuration, the bent portion can be created in the process of punching out the outer shape of the inner plate, and the processing of the inner plate does not become complicated due to the bent portion.

In the container with an inner plate (10), preferably, the inner plate integrally includes the tab, and the upper lid has lower bending rigidity than the inner plate.

According to this configuration, the attachability of the top lid to the container body is not impaired.

According to the container with an inner plate according to the present invention, the tab provided on the inner plate does not impair the workability of attaching the top cover to the container body, and the top cover can be reliably attached to the container body.

A cross-sectional view of an assembled state of one embodiment of a container with an inner plate according to the present invention (corresponding to a cross-sectional view taken along line AA in FIG. 3) A cross-sectional view of the container with an inner plate according to the present embodiment in a separated state (corresponding to a cross-sectional view taken along line AA in FIG. 3) A perspective view of the inner plate of a container with an inner plate according to the present embodiment A perspective view of the inner plate of a container with an inner plate according to another embodiment

Below, one embodiment of a container with an inner plate according to the present invention will be described with reference to FIGS. 1 to 3.

The container 10 with a medium plate is an airtight container used for take-out sales of beef bowls, Chinese bowls, curry rice, pasta dishes, etc., and includes a container body 20, a medium plate 30, and an upper lid 50.

The container main body 20 is a vacuum molded product (heat press molded product) made of foamed resin such as foamed polystyrene. It includes an annular body flange portion (first outward flange portion) 26 that extends outward to define an upper opening 22, and stores cooked rice, noodles, soup, soup stock, etc. in the container main portion 24.

The inner plate 30 is a molded product made by molding a resin sheet made of non-foamed thermoplastic resin such as polystyrene or polypropylene by heat pressing (vacuum forming) or the like. It is attached to the top of the container and stores ingredients, etc.

The inner plate 30 includes a bottom portion 32 that is circular in plan view, a substantially cylindrical side circumferential portion 34 that rises from the outer edge of the bottom portion 32, and an annular inner plate that extends outward from the upper edge of the side circumferential portion 34. flange portion (second outward flange portion) 38, and has a shallow dish shape.

The inner plate 30 has higher bending rigidity than the upper lid 50 by setting the material, thickness, etc. so that it can properly hold ingredients and the like and is not difficult to handle due to its easy deformation.

The inner plate flange portion 38 has approximately the same outer diameter as the main body flange portion 26, is placed on the main body flange portion 26, and has an outer edge 38A that substantially vertically aligns with the outer edge 26A of the main body flange portion 26.

The inner plate 30 integrally has a tab 40 extending outward from the outer edge 38A of the inner plate flange portion 38, as shown in FIG. The tabs 40 are provided at two locations rotationally displaced by 180 degrees around the center of the inner plate flange portion 38, and are each formed into a rectangular shape in plan view.

Each tab 40 includes a bent portion 42 at the boundary (base) with the outer edge 38A of the inner plate flange portion 38. The bent portion 42 includes a plurality of slit-shaped holes 44 arranged linearly at predetermined intervals in a tangential direction to the outer edge 38A, and forms perforations. As a result, the bent portion 42 has a linear shape that is easier to bend and deform in the vertical direction than the other portions of the tab 40 (portions other than the bent portion 42) and the inner plate flange portion 38.

The bent portion 42 due to the perforation is formed in the process of punching the outer shape of the inner plate 30 by providing a blade for forming the perforation in the tool for punching the outer shape of the inner plate 30 after hot pressing. good. Thereby, there is no need to add a processing step for the bending portion 42, and the processing of the inner plate 30 does not become complicated due to the bending portion 42.

As shown in FIG. 3, each tab 40 has a large number of point-shaped embossed parts 46 arranged in a grid pattern in a region closer to the free end than the bent part 42. The embossed portion 46 acts as a non-slip finger grip for the tab 40 and also acts as a dotted rib, increasing the bending rigidity of the region of the tab 40 on the free end side of the bent portion 42.

The upper lid 50 is a molded product made by molding a resin sheet made of non-foamed thermoplastic resin such as polystyrene or polypropylene by heat pressing (vacuum forming) or the like, and has a lid body that looks like a round shallow dish turned upside down. ing. The upper lid 50 has lower bending rigidity than the inner plate 30. The upper lid 50 includes a cylindrical portion 54 that hangs down from an outer edge of an upper lid main portion 52 that is circular in plan view and an outward flange portion 52A of the upper lid main portion 52 arranged on the inner tray 30, and a free end of the cylindrical portion 54. It includes an outwardly extending reinforcing flange portion 56. The outward flange portion 52A faces the main body flange portion 26 and the inner plate flange portion 38.

Near the free end of the cylindrical portion 54, locking portions 58 having semicircular cross sections that bulge inward are formed at a plurality of locations in the circumferential direction. The locking part 58 rides over the outer edge 26A of the main body flange part 26 and the outer edge 38A of the inner plate flange part 38, and engages with the lower surface of the main body flange part 26, thereby preventing the upper lid 50 from coming off from the container main body 20.

To attach the inner plate 30 and the upper lid 50 to the container main body 20, first, with the upper cover 50 not attached to the container main body 20, the cylindrical part 36 is fitted inside the container main part 24, and the inner plate flange part 38 is fitted. The inner plate 30 is set on the container body 20 so that it rests on the body flange portion 26.

Next, in order for the cylindrical part 54 of the upper lid 50 to surround the main body flange part 26 and the middle plate flange part 38, that is, so that the main body flange part 26 and the middle plate flange part 38 enter into the cylindrical part 54, The upper lid 50 is set on the container body 20 from above the inner plate 30.

As a result, as shown in FIG. 2, the inner circumferential surface 54A of the cylindrical portion 54 of the upper lid 50 fits into the outer edge 26A of the main body flange portion 26 and the outer edge 38A of the inner plate flange portion 38, and The upper lid 50 is attached to the container body 20 by the following steps.

When the inner circumferential surface 54A of the cylindrical portion 54 of the upper lid 50 fits into the outer edge 26A of the main body flange portion 26 and the outer edge 38A of the inner plate flange portion 38, each tab 40 fits into the inner circumferential surface of the cylindrical portion 54. 54A and the outer edge 26A of the main body flange portion 26 and is bent downward.

The bending of each tab 40 is performed under bending deformation of the bending portion 42 using the bending portion 42 as a bending line. The bent portion 42 forms a perforation including a plurality of holes 44 and is easily bent and deformed in the vertical direction compared to the portion of the tab 40 other than the bent portion 42 and the inner plate flange portion 38. When fitting the upper lid 50 to the container body 20, a large force is not required, and the workability of attaching the upper lid 50 to the container body 20 is improved.

In addition, since each tab 40 is bent under the bending deformation of the bending portion 42 that is easily deformed, the repulsive force due to the elastic deformation of each tab 40 is reduced in the bent state. It never gets bigger. This reduces the force acting on the top lid 50 in the direction of detachment from the container body 20 due to the bending of each tab 40, and improves the reliability of attachment of the top lid 50 to the container body 20. This eliminates the need to strengthen the fit between the container body 20 and the top lid 50, and improves the workability of attaching the top lid 50 to the container body 20.

When the cylindrical part 54 is pushed into the outer periphery of the main body flange part 26 and the middle dish flange part 38 until the outward flange part 52A of the top cover 50 comes into contact with the middle dish flange part 38, the top cover 50 is attached to the container body 20. Complete. At this time, the locking portion 58 rides over the outer edge 26A of the main body flange portion 26 and the outer edge 38A of the inner plate flange portion 38, and engages with the lower surface of the main body flange portion 26. This engagement prevents the top lid 50 from coming off from the container body 20.

Since the bending rigidity of the upper lid 50 is lower than that of the inner plate 30, the locking part 58 can ride over the outer edge 26A of the main body flange part 26 and the outer edge 38A of the inner plate flange part 38 due to the elastic deformation of the cylindrical part 54. This is done without excessive force.

When the top lid 50 is prevented from coming off from the container body 20, the repulsive force due to the elastic deformation of each tab 40 acts on the engagement portion between the locking portion 58 and the main body flange portion 26, but the repulsive force on the bent portion Since the repulsive force due to the elastic deformation of each tab 40 is smaller than that in the case where there is no tab 42, the engagement force required to prevent the tab from coming off can be reduced.

The above-mentioned functions and effects are particularly effective when the upper lid 50 has higher bending rigidity than the inner plate 30, or in other words, when the inner plate 30 has higher bending rigidity than the upper cover 50. Useful. In other words, the inner plate 30 may have the bending rigidity necessary for the inner plate 30, in addition to the ease with which the tab 40 is bent by the bending portion 42, and the bending rigidity of the upper lid 50 is lower than the bending rigidity of the inner plate 30. Even when the tab 40 is bent, the upper lid 50 is prevented from being unduly deformed due to the repulsive force when the tab 40 is bent.

Thereby, even if the inner plate 30 has higher bending rigidity than the upper lid 50, the fixation of the upper cover 50 to the container body 20 and the airtightness of the container body 20 and the inner plate 30 by the upper lid 50 are ensured.

Next, another embodiment of the inner plate 30 will be described with reference to FIG. 4. In FIG. 4, parts corresponding to those in FIG. 3 are designated by the same reference numerals as those in FIG. 3, and their explanations will be omitted.

In this embodiment, the bent portion 42 of each tab 40 extends in an arc shape along the curved contour of the main body flange portion 26, that is, along the outer edge 26A of the main body flange portion 26. In other words, the bent portion 42 is curved in an arc shape along the outer edge 38A of the inner plate flange portion 38.

When the bending portion 42 is arcuate, the ease with which the tab 40 is bent in the vertical direction is reduced compared to when the bending portion 42 is linear. Since the tab 40 is bent with a curve, both ends 42A and 42B of the bent portion 42 are not separated from the outer edge 38A of the inner plate flange portion 38 by a large distance.

This prevents the cylindrical portion 54 of the upper lid 50 from being pushed outward by the ends 42A and 42B of the bent portion 42, and improves the airtightness between the upper lid 50, the container body 20, and the inner plate 30. Further, the ease with which each tab 40 is bent in the vertical direction can be adjusted by the curvature of the bending portion 42. Thereby, the bendability of each tab 40 can be easily set to an appropriate value according to the specifications.

Although the present invention has been described above with reference to its preferred embodiments, as will be easily understood by those skilled in the art, the present invention is not limited to such embodiments, and there may be no deviation from the spirit of the present invention. It can be changed as appropriate to the extent that it does not.

For example, the shape of each hole 44 of the bent portion 42 is not limited to a slit shape long in the extending direction of the bent portion 42, and may be circular, oval, or the like. In addition to being perforated by the plurality of holes 44, the bent portion 42 may be made thinner in a linear manner than other portions, or may be formed by a half cut. The bent portion 42 may be provided in the vicinity of the boundary portion between the outer edge 38A of the inner plate flange portion 38 and the tab 40 and a little away from the boundary portion toward the free end side of the tab 40.

In other words, the tab 40 may be provided with a flexible hinge forming the bent portion 42 or a configuration equivalent to a flexible hinge at or near the boundary with the outer edge 38A of the inner plate flange portion 38.

The number of tabs 40 is not limited to two, such as one, three or more.

The container body 20, the inner plate 30, and the upper lid 50 may be pulp molded products. The container with a plate is not limited to a round shape, and may have various shapes such as an oval, an oblong, and a square. When the inner plate 30 is square, the tabs 40 are provided at areas other than the corners of the inner plate 30.

Further, all of the constituent elements shown in the above embodiments are not necessarily essential, and can be selected as appropriate without departing from the spirit of the present invention.

10: Container with inner plate 20: Container main body 22: Upper opening 24: Container main portion 26: Main body flange portion (first outward flange portion)
26A: Outer edge 30: Inner plate 32: Bottom portion 34: Side circumferential portion 38: Inner plate flange portion (second outward flange portion)
38A : Outer edge 40 : Tab 42 : Bent part 44 : Hole 46 : Embossed part 50 : Top lid 52 : Top lid main part 52A : Outward flange part 54 : Cylindrical part 54A : Inner peripheral surface 56 : Reinforcement flange part 58 : Locking part

Claims (3)

a container body including an annular first outwardly facing flange portion defining an upper opening;
an annular second outwardly facing flange portion resting on the first outwardly facing flange portion and defining an outer edge generally aligned with an outer edge of the first outwardly facing flange portion;
A container with an inner plate, the container having an upper lid main part disposed on the inner plate, and an upper lid including a cylindrical part that hangs down from the outer edge of the upper lid main part and fits into the outer edge of the first outward flange part. There it is,
The inner plate has a tab extending outward from an outer edge of the second outward flange portion,
The tab includes, at or near the boundary with the outer edge of the second outward flange portion, a linear bent portion that is easier to bend and deform in the vertical direction than other portions of the tab;
A container with an inner plate in which the bent portion is curved in an arc shape . The container with an inner plate according to claim 1 , wherein the bent portion includes a plurality of holes linearly arranged at predetermined intervals. 3. The container with an inner plate according to claim 1 , wherein the inner plate integrally includes the tab, and the upper lid has lower bending rigidity than the inner plate.

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