JPH08244811A - Closed type lidded container - Google Patents

Abstract

PURPOSE: To provide a closed type lidded container made of resin, from which fluid contents hardly flow and which has high airtightness. CONSTITUTION: A mouth edge side inner circumference 4 of a folded part of a container 1 is formed into a taper shape having a large upper side (inlet), and a forward end protruding corner part 14a of a mouth edge side outer circumference 14 of a bent part of a lid 11 is brought into an annular line contact with the mouth edge side inner circumference 4 of the folded part of the container. Further, the outer diameter of the annularly protruding corner part of the forward end is formed to have a size slightly larger than the inner diameter of a contact of the mouth edge side inner circumference of the folded part. When the lid is put on the mouth of the container and fitted thereon by vertically pressing the bent part 12 and the folded part 2 against each other, respective reverse tapers of an outer edge side inner circumference 13 of the bent part and an outer edge side outer circumference 3 of the folded part are engaged with each other, so that they cannot be disengaged from each other. Simultaneously, the bent part 12 is deformed and, by an elastic force generated from this deformation, the forward end protruding corner part of the mouth edge side outer circumference 14 of the bent part is brought into pressure contact with the mouth edge side inner circumference of the folded part. Thus, the lid is closely contacted with the mouth of the container by annular line contact, and airtightness can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-made or paper-made container with a lid for containing foodstuffs, particularly prepared foods containing fluid such as broth, in a supermarket or a store.

[0002]

2. Description of the Related Art Various types of resin-made and / or paper-made containers with lids that are lined up in stores are known.
Among them, for example, a container 101 as shown in FIG. 4 has an annular bent portion 101a whose mouth edge has a hook-shaped cross section outwardly in consideration of strength.
Then, the ring-shaped bent portion 102a of the lid 102 is fitted.

This fitting is, as shown in the partially enlarged view of FIG. 5, the outer periphery 101b of the bent portion 101a of the container 101 on the outer edge side.
The inner side of the outer peripheral side 102b of the bent portion 102a of the lid 102 and the taper surface of the angle θ1 at which the lid entrance side of the lid opens
Taper surfaces are formed at substantially the same angle, and the inner peripheral edge 101c of the bent portion of the container 101a is narrower on the lid inlet side, that is, a taper surface with an angle θ2 at which the diameter becomes smaller, and the taper surface of the lid 102 and the bent portion outer peripheral side 102c. And are formed at substantially the same angle, and have a dovetail cross section, and the lid is made difficult to separate from the container by the normal taper fitting and the fitting in the opposite direction, that is, the fitting in which the small diameter portion passes over the large diameter end. .

Further, in the enlarged view of the fitting portion of another embodiment shown in FIG. 6, the fitting surfaces 101c and 102c on the rim side are formed to be straight or tapered so that the entrance is open and the taper fitting in the opposite direction to the outside. The lid makes it difficult to remove from the container.

[0005]

On the fitting surface having the dovetail cross section shown in FIG. 5, which is described in the prior art, the contact pressure is weak and the entire circumference of both surfaces is not always in close contact. Further, in the latter case of the sectional shape of FIG. 6, the lid 102 of the lidded container and the container 101 are fitted only by the tapered surfaces of the bent portion outer edge side outer circumference 101b and the bent portion outer edge side inner circumference 102b.
Similarly, the contact pressure is weak and the entire circumference is not intimately adhered, and when a side dish containing fluid such as broth is put in the container, broth may flow out during transportation or placement. Was.

[0006] In recent years, in order to prevent the outflow of broth, a method called easy open easy peel has been used. This method requires two steps, namely, a step of applying an adhesive to the joint between the container and the lid and a step of putting the product and then bringing the lid and the container into close contact with each other, resulting in a high cost. Further, since the sheet is formed from a sheet, the thickness of the formed portion is not strictly constant, and there is a problem that there is immovability and uneven contact occurs, which cannot be a stable measure against juice leakage.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to enhance the airtightness with a container when the lid is capped and to store the fluid inside. It is an object of the present invention to provide a hermetically sealed container with a lid that is stable in quality and that does not easily flow out and is not expensive.

[0008]

In order to achieve the above object, a container with a closed lid according to the present invention comprises a resin or paper-made container (1) which is made of a resin in an annular bent portion extending outward from the rim of the container or A container with a lid for crowning an annular bent portion of a paper lid (11), wherein an outer circumference (14) of the bent portion of the lid is annular with respect to an inner circumference (4) of the bent portion of the container. The convex corners are pressure-contacted by annular linear contact.

A lid for crowning the annular bent portion of the resin or paper-made lid (11) to the annular bent portion (2) having a hook-shaped cross section extending outward from the rim of the resin or paper-made container (1). A container provided with the bent portion (2), wherein the inlet (4) of the bent portion (2) is formed into a tapered opening, and the bent portion is fitted to the inner circumference (4) of the bent portion (2). The outer periphery (14) of (12) is pressed against the inner periphery (4) of the bent portion at the annular convex corner (14a) by annular linear contact.

When the container 1 is covered with the lid 11, the tip convex corners 14a of the outer periphery 14 of the bent portion on the rim side are brought into contact with the inner periphery 4 of the bent portion on the rim side of the bent portion and lifted. In this state, when the bent portion and the bent portion are pressed together to fit, the inner circumference of the outer edge of the bent portion of the lid engages with the outer circumference of the outer edge of the bent portion of the container to prevent the lid from being separated, and The tip annular convex corner portion on the outer periphery of the mouth edge side is pressed against the inner periphery of the bent portion edge side by the elastic force of the bent portion 12 of the lid to maintain the airtightness between the lid and the container.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described with reference to the drawings.

[0012]

[Examples] Vacuum or pressure molding with a thermoplastic resin sheet, injection molding with a pellet of a thermoplastic resin, or blow molding (hollow molding), and further pressing of a paper sheet, artificial paper, or a mixture of resin and paper As shown in Fig. 1, the container 1 made by molding is made into a truncated pyramid shape with a tapering taper so that it can be easily released from the mold and the mouth side is open. An annular bent portion 2 having a hook shape is formed. The outer periphery 3 of the bent portion 2 is formed in a reverse taper with a large diameter on the upper side (lid inlet),
The taper angle θ1 is in the range of 1 ° to 5 °, preferably 2
It is supposed to be between 3 and 3 degrees. Further, the inner side 4 on the rim side of the bent portion is formed into a draft taper with a large entrance, and the taper angle θ2 is in the range of 2 ° to 10 °, preferably 4 ° to 6 °.

A tongue piece 5 which projects laterally at a right angle is formed at a lower end of a part of the outer circumference 3 on the outer edge side of the bent portion. The tongue piece 5 is substantially parallel to a diagonal line of the container 1 not including the tongue piece. An oval concave fitting portion 6 that serves as a female hook is formed. The concave fitting portion 6 is formed in a dovetail-shaped cross section with a widened bottom. Further, a tongue piece 7 is formed at a corner opposite to the tongue piece 5 so that the lid 11 can be easily opened.

As shown in FIG. 2, the lid 11 capped on the container 1 is formed with an annular bent portion 12 that engages with the annular bent portion 2 of the container 1, and the container 1 is attached to the bent portion 12. The bent portion outer edge side outer circumference 3 and the bent portion outer edge side inner circumference 13 and the bent portion mouth edge side outer circumference 14 fitted to the bent portion mouth edge side inner circumference 4 are provided. The inner periphery 13 of the outer edge of the bent portion is formed such that the lower side (lid inlet) has a small-diameter inverse taper, and the taper angle θ3 is substantially the same as θ1.

Further, the diameter D2 of the annular convex corner portion 14a at the tip of the bent portion mouth edge side outer circumference 14 is the inner diameter D1 of the line contact portion near the small diameter end of the bent portion mouth edge side inner circumference 4 formed on the tapered surface of the container 1. It is formed to have a size slightly larger, for example, 0.1 mm to 0.5 mm, preferably 0.2 mm, and the draft taper angle θ4 of the outer periphery 14 of the bent portion on the rim side is 2 ° of the taper angle θ2 of the inner side 4 of the bent portion on the rim side. About 1 corresponding to -10 °
It is made smaller than °. That is, if θ2 is 5 °, θ
4 becomes 4 °.

Further, when the lid 11 is capped on the container 1, the tongue piece 5
A small tongue piece 15 is formed so as to project laterally at a right angle from the lower end of the bent portion outer edge side inner circumference 13 at a position corresponding to, and is fitted to the approximate center of the position corresponding to the concave fitting portion 6. A circular convex fitting portion 16 is formed on the lower side thereof. The dovetail end of the cross section of the convex fitting portion 16 is made to have a diameter slightly larger than, for example, 0.3 to 0.5 mm than the width of the dovetail recessed fitting portion 6 having a bottom opening.

The base of the tongue piece 15 forms a thin portion 18 along the outer periphery of the lid 11 so that it can be easily bent. Further, a tongue piece 17 is formed at a position corresponding to the tongue piece 7 of the container 1 so as to project laterally at a right angle from the lower end of the bent portion outer edge side inner circumference 13, and the tongue piece 17 and the tongue piece 7 of the container 1 are respectively formed. It is slightly out of phase to make it easier to pinch.

Next, the operation of the embodiment of the present invention will be described. For example, in a preparation room such as a supermarket, a container 1 is filled with a side dish containing a liquid such as broth and the lid 1
1 is placed on the container 1, and the concave fitting portion 6 of the tongue piece 5 serving as a hook and the convex fitting portion 16 of the tongue piece 15 are pressed against each other from above and below to fit the bent portion 12 of the lid 11 to the container 11 When it is fitted into the bent portion 2, first, the annular convex corner portion of the tip of the bent portion rim-side outer circumference 14 comes into contact with the bent portion rim-side inner peripheral surface in an annular line contact to be lifted.

In this state, when the container and the lid are pressed vertically to be fitted to each other, the inner periphery 13 of the lid 11 on the outer edge of the bent portion and the outer periphery 3 of the container 1 on the outer edge of the bent portion are fitted by an inverse taper, and the lid 1
As shown in FIG. 3, the outer circumference 14 of the bent portion outer edge 14 is slightly larger than the diameter D1 of the line contact portion of the inner circumference 4 of the bent portion edge of the container 1 at the tip of the annular convex corner portion. As described above, the bent portion 12 and its surroundings are deformed, and due to the elasticity, the bent portion rim-side outer circumference 14 is pressed against the bent portion rim-side inner circumference 4 to be linearly adhered to maintain a high degree of sealing. The animal is blocked at the contact area and does not flow out.

To take out the contents of the container, one tongue piece, for example 7, is pinched with the left hand and the other tongue piece 17 is held with the right hand, and the bent portion 12 and the bent portion 2 are disengaged when opened up and down. Lid 1
When the 1 is lifted up, the thin portion 18 of the tongue piece 15 is bent and the contents can be taken out without any trouble even if the fitting portion which becomes the hook is still connected. When it is desired to remove the lid 11 from the container 1, the lid 11 can be removed by pulling apart a fitting portion serving as a hook.

[0021]

Since the present invention is configured as described above, it has the following effects. The outer diameter of the tip of the annular convex corner on the rim side of the bent part of the lid is made slightly larger than the inner diameter of the contact part on the inner circumference of the bent part on the rim side, and the lid is placed on the container to press the bent part and the bent part up and down. When the bent portion and the bent portion are fitted to each other on the outer edge side, the bent portion and its periphery are deformed, and the annular convex corner portion of the tip of the bent portion on the rim side is pressed against the inner periphery of the bent portion on the rim side. Since it was designed to be in close contact with the annular linear contact to maintain airtightness, it is difficult for the liquid to flow out even if there is a side dish containing the liquid in the container, for example. Will not flow out and stain the surrounding products.

In addition, since the present invention can be achieved only by forming a container in a normal process, there is no need for a special process such as easy-open and easy-peel in forming from a sheet, so that the product cost can be made much lower. it can.

[Brief description of drawings]

FIG. 1 is a view of a container with a closed lid according to an embodiment of the present invention, (a) is a front view, (b) is a side sectional view, and (c) is an enlarged view of a main part.

2A and 2B are views of a lid of a closed lid-equipped container according to an embodiment of the present invention, in which FIG. 2A is a front view, FIG. 2B is a side cross-sectional view, and FIG.

FIG. 3 is a view showing a fitted state of a bent portion and a bent portion when the lid is capped on the container.

FIG. 4 is a side sectional view of a conventional container with a lid.

FIG. 5 is an enlarged view of a main part of FIG.

FIG. 6 is an enlarged view of another main part of the conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Bending part 3 Bending part outer edge side outer circumference 4 Bending part mouth edge side inner circumference 11 Lid 12 Bending part 13 Folding part outer edge side inner circumference 14 Folding part mouth edge side outer circumference 14a Tip convex corner part

Claims (2)

[Claims] 1. A resin-made or paper-made lid (11) is provided on an annular bent portion extending outward from the rim of the resin-made or paper-made container (1).
In the container with a lid to be crowned with the annular bent portion, the outer circumference (14) of the bent portion of the lid on the rim side of the bent portion of the container is annular at the convex corner of the ring. A closed container with a lid, which is pressed by linear contact. 2. An annular bent portion (2) having a hook-shaped cross section extending outward from the rim of a resin or paper container (1) is capped with an annular bent portion of a resin or paper lid (11). A container with a lid, in which the inlet (4) of the bent portion (2) is formed into a tapered opening, and is bent to be fitted to the inner periphery (4) of the bent portion (2). With a closed lid, the outer circumference (14) of the portion (12) is pressed against the inner circumference (4) of the bent portion at the annular convex corner (14a) by annular linear contact. container.