JP2000203608A - Sealed type lid-attached container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealed type, resin-made, lid-attached container with a lib of high sealing property, wherein a fluid content is hard to flow out. SOLUTION: Annular joint projection parts 57 are provided at the side surface 54 of an annular fold opening peripheral side of a lid 51, and when the lid 51 is put on a container part 62 are vertically compressed to fit in with each other, each inverted taper of a side surface at a fold part outer peripheral side and a side surface 63 at a curvature outer peripheral side connect one another, and the annular joint projection part 57 of the side surface 54 at the fold opening peripheral side connects to the side surface 64 at the curvature opening peripheral side; which they come in close contact with each other through a ring-like linear contact to be compressed, resulting in a sealing property kept in the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Various shapes of resin-covered containers arranged in a store are known. Among them, for example, as shown in FIG. Is attached to an annular bent portion 101a having a hook-shaped cross section outwardly.
The annular bent portion 102a is fitted. As shown in the partially enlarged portion of FIG.
The tapered surface of the outer edge side surface 101b of the outer edge side 1a at the angle θ1 where the lid inlet side opens, that is, a large diameter, and the tapered surface of the outer edge side surface 102b of the bent portion 102a of the lid 102 are formed at substantially the same angle. The side surface 101c is formed in such a manner that the taper surface of the angle θ2 at which the lid inlet side becomes narrow, that is, the diameter becomes smaller, and the taper surface of the lip side surface 102c of the bent portion of the lid 102 are formed at substantially the same angle, and have a tongue-shaped cross section. The lid is made difficult to be detached from the container by the taper fitting and the fitting in which the small diameter portion goes over the large diameter end.

In the enlarged view of the fitting portion in another form shown in FIG. 30, the mouth-side fitting surfaces 101c and 102c are formed to have a taper that allows the entrance to open by straightness or draft, and the taper in the opposite direction of the side surface on the outer edge side. The lid makes the lid difficult to detach from the container by fitting.

[0004]

The contact surface is weak on the fitting surface having a bevel-shaped cross section shown in FIG. 29, which is described in the prior art, and the two surfaces are not always in close contact with each other. The latter figure 3
In the case of the cross-sectional shape of 0, the lid 102 of the lidded container and the container 10
Since the fitting of 1 is only engaged by the tapered surface of the outer peripheral side surface 101b of the bent portion and the outer peripheral side surface 102b of the bent portion, the contact pressure is similarly weak and the entire circumference is not necessarily in close contact. However, when side dishes containing fluids such as broth are put in a container, there is a problem that the broth flows out during transportation or depending on how to place them.

[0005] In recent years, a method called easy open easy peel has been used to prevent outflow of boiling juice. This method requires two steps, a step of applying an adhesive to the joint between the container and the lid, and a step of putting the article and then bringing the lid and the container into close contact with each other by pressure, resulting in an increase in cost.
In addition, since it is formed from a sheet, the thickness of the formed portion is not strictly constant, and there is immovability, so that there is a problem that uneven adhesion may occur and it may not be a stable juice leakage measure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to improve the airtightness of a container when a lid is covered and to improve the airflow in a container. It is an object of the present invention to provide a closed-type container with a stable lid that is stable in quality and that does not increase the cost of animals flowing out.

[0007]

In order to achieve the above-mentioned object, a container with a closed lid according to the present invention comprises an annular bent portion having a hook-like cross section extending outward from an edge of a resin or paper container (1). (2) A lid-covered container for covering an annular bent portion having a hook-shaped cross section of a resin or paper-made lid (11), wherein an upper surface (15) of a bent portion (12) of the lid fitted to the bent portion is provided. ) And the bendable portion edge side surface (14) are provided with a chamfered portion (10), and when the lid is covered with the container, the chamfered portion is bent at the upper end of the bent portion (9). Are pressed against each other by an annular linear contact.

[0008] Further, the present invention is a container with a lid in which a resin or paper lid (31) is covered by an annular bent portion (22) having a hook-shaped cross section that goes outward from the edge of the resin or paper container (21). And an annular engagement recess (26) or an annular engagement with the annular engagement recess in the upper surface (35) of the bent portion upper surface (25) of the container and the bent portion (32) of the lid fitted in the bent portion. One of the engaging projections (36A) is provided, and when the lid is covered with the container, the engaging projections and the engaging recesses are pressed against each other by an annular linear contact.

An annular bent portion having a hook-shaped cross section of a resin or paper-made lid (51) is provided at an annular bent portion (42) having a hook-shaped cross section extending outward from an edge of a resin or paper container (41). A container with a lid to be covered, wherein the gap between the lip side surface of the bent portion of the container and the lip side surface of the bent portion of the lid inclines both side surfaces or one side surface so that the container entrance side becomes larger,
The edge side surface (44) of the bent portion (42) of the container and the edge side surface (5) of the bent portion (52) of the lid fitted into the bent portion.
4) is provided with either an annular engaging concave portion (46) or an annular engaging convex portion (56) engaging with the annular engaging concave portion, and the engaging concave portion is formed when the lid is covered with the container. And the engaging projections are pressed against each other by an annular linear contact.

Further, the bent portion of the container has a flange-shaped cross section without the outer side surface, and the bent portion of the lid covered by the bent portion is also a container with a lid without the outer side surface.

An annular bent portion having a hook-shaped cross section of a resin-made or paper-made lid (51) is provided at an annular bent portion (62) having a hook-shaped cross section extending outward from an edge of the resin-made or paper-made container (61). A container with a lid to be covered, wherein the gap between the lip side surface of the bent portion of the container and the lip side surface of the bent portion of the lid inclines both side surfaces or one side surface so that the container entrance side becomes larger,
An engagement protrusion is formed such that the top surface abuts on a corresponding surface on one of the bent side edge side surface (64) of the container and the bent side portion (52) of the lid fitted in the bent portion. Department (5
7) is provided in an annular shape, and when the lid is covered with the container, the top of the engaging projection is pressed against the corresponding surface by an annular linear contact.

An annular bent portion (62) having a hook-like cross section of the resin-made or paper-made lid (51) and an annular bent portion (62) having a hook-shaped cross-section extending outward from the edge of the resin-made or paper-made container (61). 52) A container with a lid to cover the container, wherein the lip side surface (64) of the bent portion is formed to have a tapered shape by narrowing the inlet side, and a gap is formed between the bent portion lip side surface (54) and the facing inlet side. In addition, the gap is formed so that the inlet side is reduced, and the annular engagement convex portion (59) is formed to be brought into pressure contact with the facing surface by an annular line contact.

[0013]

In the container with a lid according to the first aspect, when the container is covered with a lid and the beveled section and the bent section having a bevel cross section are fitted up and down by pressing up and down, the lid is prevented from being detached and folded at the same time. The flattened portion 10 provided at the intersection of the upper surface 15 and the side surface 14 of the bent portion is formed at the upper end convex corner portion 19 of the bent portion.
To keep the lid and the container airtight.

According to a second aspect of the present invention, there is provided a container with a lid, wherein a lid 31 is placed on the container 21 and the annular bent portion 22 and the annular bent portion 3 each having a tongue-shaped cross section.
2 is pressed upward and downward to prevent the lid from being detached, and at the same time, the annular engaging convex portions 36A or 36B provided on the bent upper surface 35 and the annular bent upper surface 25 are formed in the annular engaging concave portion 26 in an annular shape. To keep the lid and the container airtight.

In the container with a lid according to the third aspect, a lid 51 is provided in the container 41.
When the annular bent portion 42 and the annular bent portion 52 are vertically pressed and fitted to each other, the reverse taper of the bent portion outer edge side surface 43 and the bent portion outer edge side surface 53 is engaged, and at the same time, the bent portion edge side surface 44 is bent. The annular engaging concave portion 46 and the annular engaging convex portion 56 provided on the edge side surface 54 are engaged with each other, so that the lid is prevented from being detached. It is pressed by annular line contact and keeps the lid and container airtight.

In the container with a lid according to the fourth aspect, when the lid is put on the container and pushed in, the flange is brought into close contact, and the annular engaging convex portion on the side of the lip of the bent portion has the shoulder of the annular engaging concave portion on the side of the lip of the bent portion. The part and the convex part or the valley of the concave part and the apex of the convex part are linearly contacted in a line with one line or two lines, so that the airtightness of the container is maintained.

In the container with a lid according to the fifth aspect, a lid 51 is provided in the container 61.
When the bent portion 62 having the hook-shaped cross section and the bent portion 52 are vertically pressed and fitted to each other, the reverse taper of the bent portion outer edge side surface 63 and the bent portion outer edge side surface 53 are engaged, and at the same time the bent portion edge side surface is engaged. The distal end of the annular engaging projection 57 of the lip side surface 54 of the bent portion is pressed into contact with the ring 64 by linear contact in a line, preventing the lid from being detached and keeping the lid and the container airtight.

In the container with a lid according to the sixth aspect, when the lid is placed on the container and pushed in, the bent portion having the hook-shaped cross section is fitted to the bent portion having the hook-shaped cross section, and the annular engaging triangular ridge on the side of the edge of the bent portion is formed. The convex portion) is line-contacted to the opposite side of the bent portion in an annular shape, and airtightness is maintained at a high surface pressure of the line contact portion.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. EXAMPLE 1 As shown in FIG. 1, a container 1 made by sheet molding using a thermoplastic resin is formed in a truncated pyramid shape having a tapered opening and an open mouth side so as to be easily detached from a mold. The edge is formed with an annular bent portion 2 having a hook-shaped cross section outward for reinforcement. The outer periphery 3 of the bent portion 2 is a reverse taper having a large diameter on the upper side (lid entrance), and the edge side surface 4 of the bent portion 2
Is formed in a reverse taper having a small diameter on the upper side (lid entrance), and the taper angles θ1 and θ2 are both in a range of 1 ° to 5 °, preferably 2 ° to 3 °.

A tongue 6 protruding at right angles to the side is formed at a lower end of a part of the outer peripheral side surface 3 of the bent portion, and the tongue 6 is substantially parallel to a diagonal line not including the tongue of the container 1. An oval-shaped concave fitting portion 7 serving as a female hook is formed on the hook. The recessed fitting portion 7 is formed in a tongue-shaped cross-section with an expanded bottom. Further, a tongue piece 8 serving as a knob is formed at a corner facing the tongue piece 6 at a right angle to the lower end of the bent portion outer edge side surface 3 where the lid 11 is easily opened.

As shown in FIG. 2, the lid 11 covered by the container 1 has an annular bent portion 1 which engages with the bent portion 2 of the container 1.
An outer edge side surface 13 that fits tightly with the bent portion outer edge side surface 3 of the container 1 in the bent portion 12 and a bent portion edge side fitted into the bent portion edge side surface 4 of the container 1 A side surface 14 is provided. The bent portion outer edge side surface 13 has a small diameter reverse taper on the lower side (lid entrance), and the bent portion edge side surface 14 has a large diameter reverse taper on the lower side (lid entrance). Taper angles θ1, θ
2 and the same angle. Further, the bent portion 12 is provided with an annular flattening portion 10 at the intersection of the upper surface 15 and the edge side surface 14.

A tongue 16 is formed on the lid 11 at a position corresponding to the tongue 6 when the container 1 is covered with the tongue 6 so as to project laterally at a right angle from the lower end of the bent portion outer edge side surface 13.
A circular convex fitting portion 17 that fits substantially at the center of the position corresponding to the concave fitting portion 7 is formed below. The tip of the tongue-shaped cross-section of the convex fitting part 17 is formed to have a diameter slightly larger than the width of the tongue-shaped concave fitting part 7 with an open bottom by, for example, 0.3 to 0.5 mm. The base of the tongue piece 16 forms a thin portion 19 along the outer periphery of the lid 11 so that it can be easily bent. A tongue piece 18 is formed at a position corresponding to the tongue piece 8 of the container 1 so as to protrude from the lower end of the bent portion outer edge side surface 13 at a right angle to the side. The tongue piece 18 and the tongue piece 8 of the container 1 are each gripped. The phases are slightly shifted for ease.

Next, the first operation of this embodiment will be described. In a preparation room such as a supermarket, a container 1 is filled with side dishes including fluids such as broth for one person.
1 is placed on the container 1, and the concave fitting portion 7 of the tongue piece 6 and the convex fitting portion 17 of the tongue piece 16 that are to be hooked are fitted by being pressed from above and below, and the bent portion 12 of the lid 11 is further fitted to the container 1. 1 bent part 2
When the container 1 and the lid 11 are pressed up and down to fit each other, as shown in FIG.
3 and the lip side surface 14 are respectively fitted to the bent portion outer rim side surface 3 and the bent portion lip side surface 4 of the container 1 by reverse taper. Is flattened at the upper end of the bent portion 2 at the annular convex corner portion 9.
And the bent portion and its surroundings are deformed against the fitting force due to the reverse taper, and the annular flattened portion 10 is pressed against the annular convex corner portion 9, and the entire circumference is closely adhered in a linear shape to maintain high sealing performance. ,
The fluid inside is blocked by this contact portion and does not flow out.

To remove the contents of the container 1, one of the tongue pieces, for example, 8 is gripped with the left hand and the other tongue piece 18 is gripped with the right hand and opened up and down, whereby the bent portion 12 and the bent portion 2 are disengaged. Then, when the lid 11 is lifted, the thin portion 19 of the tongue piece 16 is bent so that the contents can be taken out without hindrance even if the lid 11 is continued to the fitting portion serving as a hook. When it is desired to remove the lid 11 from the container 1, the lid 11 can be separated by pulling apart the fitting portion serving as a hook.

[0025] Incidentally, the reverse taper as shown in FIG. 4 is only θ1 lid 11 is folded outer edge sides 13 which fit to the bent outer edge side 3 of the container 1, the bent portion opening edge side face 4
Even if the bent portion edge side surface 14 is straight, substantially the same sealing performance can be obtained.

Second Embodiment The only difference from the first embodiment is a bent portion and a bent portion. As shown in FIG. 5, in a container with a lid comprising a container 21 and a lid 31, a container 21 is provided.
The outer side surface 23 and the lip side surface 24 of the annular bent portion 22 having the hook-shaped cross section of FIG.
Is provided, and an engagement concave portion 26 is provided in an annular shape substantially at the center of the upper surface 25 of the bent portion.

Outer edge side surface 33 of bent portion 32 of lid 31
And the edge side surface 34 are provided with reverse tapers θ1 and θ2, respectively, and the engagement protrusions 3 shown in FIG.
6A or 6B, an engagement protrusion 36B is provided in an annular shape, and this engagement protrusion is formed into an engagement recess before the bent portion 32 is completely inserted into the bent portion 22 having the hook-shaped cross section. 26.

The annular engaging convex portion 36A has a two-point cross-sectional contact because the R dimension of the convex surface is slightly larger than the R dimension of the concave surface of the mating partner. On two lines. Further, the annular engaging convex portion 36B is formed so that the R dimension of the convex surface is slightly smaller than the R dimension of the concave surface of the mating partner, so that the cross-sectional one-point contact is made, and the annular engaging convex portion 36B is aligned with the annular engaging concave portion 26. Engage. Therefore, when the lid 31 is covered with the container 21, the annular engaging concave portion 26 and the annular engaging convex portion 36A or 36B are pressed against each other by an annular line contact to maintain the airtightness.

As shown in FIGS. 7 (a) and 7 (b), the reverse taper is only the outer periphery 23 on the outer edge of the bent portion of the container 21 and the inner periphery 33 on the outer edge of the bent portion of the lid 31. Even when the bent portion edge side inner circumference 34 is straight, substantially the same sealing performance can be maintained.

Third Embodiment The third embodiment differs from the first and second embodiments only in the bent portion and the bent portion, and the other portions are the same. As shown in FIGS. 8 and 9, an outer side surface 43 of an annular bent portion having a hook-shaped cross section and an outer side surface 5 of an annular bent portion are provided.
3 is fitted with a reverse taper θ1. Hereinafter, this fitting is referred to as "a-shaped fitting". An annular engaging concave portion 46 is provided on the rim side surface 44 of the annular bent portion 42 of the hook-shaped cross section of the container 41, and the annular engaging concave portion 46 is engaged with the rim side surface 54 of the bent portion 52 of the lid 51. An engagement projection 56 is provided.

The annular engaging projection 56 is formed in the annular engaging concave 46.
The shoulder portion of the bent portion is in contact with two lines or one line, or one line of the peak of the convex portion and the valley of the concave portion, and the edge side surface 44 of the bent portion and the edge side surface 54 of the bent portion are slightly separated from each other. Therefore, when the lid 41 is covered with the container 41, the annular engaging convex portion 56 is brought into close contact with the annular engaging concave portion 46 in an annular and linear manner, and is pressed to maintain the airtightness. In addition, as shown in FIG. 10, a reverse taper .theta.2 is also provided on the bent portion rim side surface 44 and the bent portion rim side surface 54, so that the airtightness can be similarly maintained by making the cross section into a tongue shape.

Embodiment 3 A third modification will be described. FIG. 11 is a modified version of FIG. 9 in which annular engaging projections and recesses are fitted between the edge of the annular bent portion of the hook-shaped cross section of the container and the edge of the annular bent portion of the hook-shaped cross section of the lid. Will be described with respect to portions different from FIG. The fitting on the outer edge side is an a-shaped fitting, the edge side surface 44 of the bent portion 42 of the container 41 is substantially perpendicular to the container bottom surface, and an annular engaging concave portion 46 is provided substantially at the center or below. Have been.

The edge side surface 54 of the bent portion 52 of the lid 51 is formed as a tapered surface having an angle θ 2 at which the gap becomes large on the entrance side of the container 41, and the annular member engaged with the annular engagement concave portion 46 on this side surface 54. A mating projection 56 is provided. The annular engaging projection 56 is in contact with the upper or lower corner of the annular engaging recess 46, the line at the top of the projection and the valley of the recess, or the upper and lower corners. The annular engaging projection 56 may have any shape of a circular arc, a triangular mountain, or a trapezoid. Further, the diameter of the arc of the convex portion may be substantially the same as or different from that of the concave portion. The ceiling surface of the bent portion and the bent portion may be in close contact or may have a gap.

In FIG. 12, the fitting portion on the outer edge side in FIG. 11 is changed, and an annular bent portion 42 having a hook-shaped cross section of the container 41 is shown.
An annular engaging concave portion 47 is formed on the lower edge of the outer edge side surface 43 of the outer peripheral side of the outer peripheral side surface 43, and the annular engaging concave portion 47 is engaged with the outer edge side surface 53 of the bent portion 52 having a hook-like cross section of the lid 51. An engagement protrusion 58 (which may be considered as an annular engagement recess for fitting the back surface) is provided and fitted. The fitting of the engaging portion is referred to as "b-shaped fitting". The annular line contact between the annular engaging convex portion 56 and the annular engaging concave portion 46 on the side surface on the edge side is brought into contact with strong surface pressure.

In FIG. 13, the annular engaging concave portion of the outer peripheral side surface 43 of the annular bent portion 42 of the hook-shaped cross section of the container 41 shown in FIG. 12 is removed, and the underside thereof is replaced with the outer peripheral side surface of the annular bent portion 52 of the lid 51. The annular engaging projection 58 of 53 is hooked. Hereinafter, this fitting is referred to as a C-shaped fitting.

In FIG. 14, the container 41 shown in FIG.
Of the annular bent portion 42 is formed into a taper having an angle θ3 with a narrower entrance, and the taper on the edge side of the annular bent portion of the lid 51 is larger in angle θ4 than the angle θ3 in the same direction as the taper. It is a thing. In this example, the fitting is a-shaped, but the fitting may be of a b-shaped or a c-shaped.

In FIG. 15, the container 41 shown in FIG.
Outer side surface of the bent portion 42 and the bent portion 52 of the lid 51
Are removed to form a flange-shaped cross section. Since the side surface of the bent portion on the rim side is narrowed on the inlet side and is formed into a tapered shape, a high surface pressure can be obtained at the annular line contact position when the flange is in close contact.

Fourth Embodiment FIGS. 16 and 17 are different from the third embodiment in the present embodiment.
As shown in the figure, the bent portion rim side surface 64 of the container 61 has a flat cylindrical surface without an annular engagement concave portion, and the bent portion rim side surface 64
Is slightly smaller than the outer diameter of the top of the annular engaging projection 57 of the lid 51 by, for example, 0.1 to 0.5 mm, preferably 0.2 mm.

Accordingly, when the lid 51 is covered with the container 61, the annular engaging projection 57 is pressed against the flat cylindrical surface of the edge side surface 64 of the container 61 in an annular and linear manner to maintain the airtightness. The means for fitting the bent portion when the lid is covered with the container to the bent portion is not limited to the reverse taper θ1 or θ2, but the engaging convex portion provided at the lower end of the outer peripheral side surface of the bent portion. Can be fitted by climbing over the lower end of the outer peripheral side surface of the bent portion and being covered with a C-shaped fitting. Of course, it is also possible to use a square fitting.

Embodiment 4 A fourth embodiment will be described with reference to the drawings. In FIG. 18 corresponding to FIG. 17, a portion different from FIG. 17 will be described in FIG. 18 corresponding to FIG. 17 in which an annular engaging convex portion is formed on the edge side surface of the annular bent portion of the lid and the edge side surface of the annular bent portion of the container is brought into annular line contact.

The entrance side of the annular bent portion rim side surface 64 of the container 61 is formed to be a taper that can be freely opened, and the rim side surface 54 of the annular bent portion of the lid 51 is formed substantially perpendicular to the bottom surface. The outer side surface of the bent portion of the container and the outer side surface of the bent portion of the lid are formed in an a-shape, and the side surface of the lip is formed to have a tapered opening on the inlet side. The engagement convex portion 57 is formed in such a size as to make a line contact with the rim side surface 64 of the annular bent portion of the container 61 in a ring shape and to make a line contact with a strong surface pressure. In this example, the outer edge side surfaces of the bent portion and the bent portion are a-shaped fitting, but may be freely shaped into a b-shaped fitting or a c-shaped fitting.

In FIG. 19, the edge side surface of the bent portion in FIG. 18 is a surface perpendicular to the bottom surface of the container, and the bent edge side surface is formed into a taper in a direction in which the gap on the entrance side becomes larger.

In FIG. 20, the bent portion edge side surface 5
4 is a surface substantially perpendicular to the bottom surface, and the gap on the entrance side of the container rim side is made smaller on the contrary to that described above. is there. A strong surface pressure line contact is obtained at the top of the annular triangle 59 on the side surface 54, and high sealing performance is maintained.

In FIG. 21, a flange-shaped cross-section is obtained by removing the side surface on the outer edge side in FIG. 20, and high sealing performance is obtained.

Further, as shown in FIG. 22, an annular engaging projection 67 is provided on the rim side surface 64 of the bent portion of the container 61, and the lip side surface 54 of the bent portion of the lid 51 is formed into a flat cylindrical surface. Can be kept.

Embodiment A description will be given of a modification of the fourth embodiment shown in FIG. An annular engaging projection 67 is formed on the rim side surface 64 of the annular bent portion 62 having the hook-shaped cross section of the container 61 shown in FIG. 22 to make contact with the plane of the rim side surface 54 of the annular bent portion 52 of the lid 51 in an annular line. In FIG. 23, an annular engaging convex portion 67 of the bent portion 62 is formed so that the inlet side is open and the edge side surface 64 is made to be a taper.
On the other hand, the edge side surface 54 of the annular bent portion 52 of the lid 51
Are substantially perpendicular to the bottom surface of the container and are brought into annular line contact with the annular engaging projection 67. And it is made to have a dimension that the contact surface pressure becomes high. That is, the annular engaging projections shown in FIG. 22 are formed on the opposite surface. It is to be noted that, instead of the a-shaped fitting of the present example, a b-shaped fitting or a c-shaped fitting may be freely used.

In FIG. 24, the edge side surface 64 of the annular bent portion 62 having a hook-shaped cross section in FIG. 23 is made substantially perpendicular to the bottom surface, and the edge side surface 54 of the annular bent portion 52 of the lid 51 is connected to the inlet 61 of the container. The gap on the side is formed to be a taper that can be freely increased, and is brought into annular line contact with the annular engaging convex portion 67, so that the contact surface pressure is increased. It is to be noted that, instead of the a-shaped fitting of the present example, a b-shaped fitting or a c-shaped fitting may be freely used.

In FIG. 25, the edge side surface 64 of the annular bent portion of the container 61 is tapered at the angle θ7 of the container because the container entrance is narrowed, and the edge side surface 5 of the annular bent portion 52 of the lid 51 is formed.
4 is a taper having an angle θ8 and is formed so that θ7 <θ8. In the fitted state, the annular engagement convex portion 67 and the tapered edge side surface 54 are formed to have an annular strong line contact. It is to be noted that, instead of the a-shaped fitting of the present example, a b-shaped fitting or a c-shaped fitting may be freely used.

In FIG. 26, the a-shaped fitting portion is removed from FIG. 24, and when the annular bent portion 62 of the flange-shaped cross section of the container and the annular bent portion 52 of the flange-shaped cross section of the lid are in close contact with each other, The annular engaging projection 67 and the tapered surface of the side edge 54 of the bent portion of the lid are formed in such a size that they come into contact with each other at a high line pressure by annular line contact.

FIG. 27 is the same as FIG. 25 except for the a-shaped fitting portion.

[0071]

Since the present invention is configured as described above, the following effects can be obtained. Claim 1 provides an annular flattened portion at the intersection of the upper surface of the annular bent portion of the hook-shaped cross section of the container and the side surface on the rim side, and covers the container with the lid and presses the bent portion and the bent portion up and down. When fitted, it becomes difficult to separate due to the reverse taper, and at the same time, the upper annular convex corner of the bent portion is in close contact with the chamfered portion by an annular linear contact so that the airtightness is maintained, so that the sheet is easily formed. Since a special process such as open easy peeling is not required, high sealing performance is obtained by molding in the usual process, so the product cost is low in a container with a lid, such as a side dish containing a fluid in the container. Even if the liquid is put in, the liquid does not easily flow out, so that the liquid does not flow out during transportation or depending on the place and does not stain the surrounding goods.

According to a second aspect of the present invention, one of the annular engaging concave portion and the engaging convex portion is provided on the upper surface of the bent portion of the container and the bent portion of the lid, and the bent portion and the bent portion are fitted. ,
Since the engaging concave portion and the engaging convex portion are brought into close contact with each other by an annular linear contact and the hermeticity is maintained, the same effect as described above can be obtained.

According to a third aspect of the present invention, the annular engaging projection and the annular engaging recess are formed on the edge side surface of the annular bent portion and the edge side surface of the annular bent portion of the lid. The annular line contact with a high surface pressure is made at two positions or one position of the corner of the valley or at one position of the valley, so that the tightness of the container is maintained.

According to a fourth aspect of the present invention, the annular bent portion having the flange-shaped cross section of the container and the annular bent portion having the flange-shaped cross section of the lid are formed into a tongue-shaped fit, and when they are overlapped, they are engaged by a component force of a tongue-shaped taper. Since the convex portion is in line contact with the flat facing surface with a high surface pressure, the annular engaging concave portion and the annular engaging convex portion are two lines or one line at the corner of the concave portion or one line at the valley, and an annular line having a high surface pressure. Since the contact is made, the hermeticity of the container is maintained. In addition, it is easy to manufacture because it has a collar shape.

A fifth aspect of the present invention is to form an annular engaging convex portion on one of the edge side surface of the annular bent portion of the container and the edge side surface of the annular bent portion of the lid so as to form an annular line contact with high surface pressure. As a result, the hermeticity of the container is maintained.

Claim 6 has the same effect as that of claim 5, but
The annular engaging projection is the top of the triangle, and an annular line contact with high surface pressure can be expected.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of a container of a first closed container with a lid according to an embodiment of the present invention, wherein (a) is a front view and (b) is a side sectional view.

2 (a) is a front view and FIG. 2 (b) is a sectional side view of the lid of the first container with a closed lid according to the embodiment of the present invention.

FIG. 3 is a diagram showing a fitting state of a bent portion and a bent portion when the first lid is covered with the container, and is an enlarged view in a case where the fitting surface has an inverse taper on both sides.

FIG. 4 is an enlarged view of a fitting portion in a case where only an outer fitting surface of a first bent portion and a bent portion has a reverse taper.

FIG. 5 is a cross-sectional view of a side surface of a second closed container with a lid according to the embodiment of the present invention.

FIG. 6 is an enlarged view of a fitting portion between the second lid and the container according to the embodiment;
(A) is a figure which shows the state of the contact part when convex R is larger than concave R, (b) is a figure which shows the state of the contact part when convex R is smaller than concave R.

FIGS. 7A and 7B are enlarged views of a fitting portion in a case where only an outer fitting surface of a second bent portion and a bent portion has a reverse taper in the embodiment.

FIG. 8 is a side sectional view of a third lid and a container according to the third embodiment of the present invention.

FIG. 9 is an enlarged view of a fitting portion between the third lid and the container according to the third embodiment.

FIG. 10 is an enlarged view of a joint portion between the lid and the container in which the side surface on the rim side of the third embodiment shown in FIG. 9 is inclined.

11 is an enlarged view of a joint portion between the lid and the container, in which the side surface on the edge side of the bent portion in FIG. 9 of the third embodiment is inclined.

FIG. 12 is an enlarged view of a joint portion between the lid and the container in which the outer side surface of the third embodiment shown in FIG.

FIG. 13 is an enlarged view of a joint portion between the lid and the container in which the outer side surface of the third embodiment shown in FIG.

FIG. 14 is an enlarged view of a joint portion of a container in which the container entrance is narrowed on both sides of the edge of both the container and the lid in the third embodiment shown in FIG. 9;

FIG. 15 is an enlarged view of a joining portion between the lid and the container having a flange-shaped cross section in the third embodiment shown in FIG. 14;

FIG. 16 is a side sectional view showing a fourth lid and a container according to the fourth embodiment of the present invention.

FIG. 17 is an enlarged view of a fitting portion between the lid and the container according to the fourth embodiment.

FIG. 18 is an enlarged view of a fitting portion between the lid and the container, which is opened at the edge side surface entrance of the bent portion in FIG. 17 of the fourth embodiment.

FIG. 19 is an enlarged view of a fitting portion between the lid and the container, in which the side surface of the edge of the bent portion in FIG. 17 of the fourth embodiment is inclined in a direction in which the gap from the container entrance side is increased.

FIG. 20 is an enlarged view of a fitting portion between the lid and the container in which the side surface on the edge side of the fourth bent portion is vertical.

21 is an enlarged view of a fitting diagram of a lid and a container having FIG. 20 as a flange-shaped cross section.

FIG. 22 is an enlarged view of a fitting portion between the lid and the container, in which the annular engaging convex portion of the fourth embodiment shown in FIG. 17 is formed on the opposite surface.

FIG. 23 is an enlarged view of a fitting portion between the lid and the container in which the side of the rim side of the bent portion in the fourth embodiment shown in FIG.

FIG. 24 is an enlarged view of a fitting portion between the lid and the container, in which the side surface on the edge side of the bent portion in FIG.

FIG. 25 is an enlarged view of a fitting portion of a lid and a container in which both sides of the rim side of the fourth embodiment shown in FIG.

FIG. 26 is an enlarged view of a fitting portion of the lid and the container having the flange-shaped cross section of the fourth embodiment shown in FIG. 24;

FIG. 27 is an enlarged view of a fitting portion between the lid and the container having the flange-shaped cross section of the fourth embodiment shown in FIG. 25;

FIG. 28 is a side sectional view of a conventional container with a lid.

FIG. 29 is an enlarged view of a fitting portion of FIG. 28.

FIG. 30 is an enlarged view of a fitting portion different from that of FIG. 28;

[Explanation of symbols]

1,21,41,61 Container 11,31,51 Lid 2,22,42,62 Circular bend 12,32,52 Circular bend 3,23 Bend outer edge side surface 4,24,44,64 Bend Edge side surface 5, 25 Bent portion upper surface 9 Annular convex corner portion 10 Annular flattened portion 13, 33 Outer edge side surface of bent portion 14, 34, 54 Edge portion side surface of bent portion 15, 35 Upper surface of bent portion 26, 56 Annular engagement concave portion 36 , 36,46,36,37,57,67 annular engagement projection

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E067 AA03 AA11 AB01 BB01A BB14A BC07A EA18 EC11 GD06 3E084 AA05 AA14 AA24 AA34 CA03 CC03 CC07 DA03 DB13 DC03 DC07 FA09 FC01 GA08 GB12 HA03 HB01 HC03

Claims (6)

[Claims] An annular bent portion having a hook-shaped cross section extending outward from an edge of a resin or paper container (1) and an annular bent portion having a hook shaped cross section of a resin or paper lid (11). And a flattened portion (10) at the intersection of the upper surface (15) of the bent portion (12) of the lid fitted to the bent portion and the side surface (14) on the edge of the bent portion. ), Wherein when the lid is covered with the container, the flattened portion is pressed into contact with the upper convex portion (9) of the bent portion by an annular linear contact. 2. An annular bent portion having a hook-shaped cross section of a resin-made or paper-made lid (31) and an annular bent portion having a hook-shaped cross section extending outward from an edge of the resin-made or paper-made container (21). (25) a container with a lid that covers
And an annular engaging protrusion (36A) in which an annular engaging recess (26) is engaged with the annular engaging recess on the upper surface (35) and the back surface of the bent portion (32) of the lid fitted in the bent portion. A closed-type container with a lid, wherein one side is provided, and when the lid is covered with the container, the engagement projection and the engagement recess are pressed against each other by an annular linear contact. 3. An annular bent portion having a hook-shaped cross section of a resin or paper-made lid (51) and an annular bent portion having a hook-shaped cross section directed outward from an edge of a resin or paper container (41). Container with a lid, the gap between the lip side surface of the bent portion of the container and the lip side surface of the bent portion of the lid inclines both sides or one side so that the container entrance side is large, the container The edge side surface (44) of the bent portion (42) and the edge side surface (5) of the bent portion (52) of the lid fitted in the bent portion.
4) is provided with either an annular engaging concave portion (46) or an annular engaging convex portion (56) engaging with the annular engaging concave portion, and the engaging concave portion is formed when the lid is covered with the container. A container having a hermetically sealed lid, which is brought into pressure contact with the engaging projection by an annular linear contact. 4. The sealed lid according to claim 3, wherein the bent portion of the container has a flange-shaped cross section without an outer edge side surface, and the bent portion of the lid covered by the bent portion has a lidless container with no outer edge side surface. With container. 5. An annular bent portion having a hook-shaped cross section of a resin-made or paper-made lid (51) and an annular bent portion having a hook-shaped cross-section extending outward from an edge of the resin-made or paper-made container (61). Container with a lid, the gap between the lip side surface of the bent portion of the container and the lip side surface of the bent portion of the lid inclines both sides or one side so that the container entrance side becomes large, the container The engagement convex portion such that the top surface abuts on the corresponding surface on either the edge side surface (64) of the bent portion or the edge side surface (54) of the bent portion (52) of the lid fitted in the bent portion. (5
7) A container with a closed lid, wherein the container is provided in an annular shape, and when the lid is covered with the container, the tops of the engaging projections are pressed against the corresponding surfaces by annular linear contact. 6. An annular bent portion having a hook-shaped cross section of a resin-made or paper-made lid (51) and an annular bent portion having a hook-shaped cross section directed outward from an edge of a resin-made or paper-made container (61). (5
2) A container with a lid to cover the container, wherein the side of the rim side (64) of the bent portion is formed into a tapered shape by narrowing the entrance side, and a gap is formed between the flank (54) of the bent portion and the entrance side of the facing surface. A container with a closed lid, wherein the container is formed so that the gap is formed so that the inlet side is small, and an annular engaging projection (59) is formed so as to be brought into pressure contact with the opposite surface by annular line contact.