JP2000142747A - Lid device and sealed container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a lid member and a container main body to be engaged with each other while a sealing characteristic is being kept between a flange part and the lid device before and after a seal film is removed from the flange part of the container main body. SOLUTION: An engaging sidewall 21 of a lid device 20 is installed at a flange part of a container main body 10. In the case that a seal film 32 is heat sealed on the flange part 15, the flange part 15 is engaged between a first protrusion 22a and a second protrusion 22b, and an outer circumference 32a of the seal film 32 is held between the flange part 15 and the engaging sidewall 21. In the case that the seal film 32 is peeled from the flange part 15, the flange 15 is engaged between the first protrusion 22a and a circumferential edge plate 23. An inner diameter L2 of the engaging sidewall 21 between the first protrusion 22a and the circumferential edge plate 23 is smaller than an inner diameter L1 of the engaging sidewall 21 between the first protrusion 22a and the circumferential edge plate 23, so that the flange part 15 engaged between the first protrusion 22a and the circumferential edge plate 23 and the engaging side wall 21 are closely contacted with each other to keep a close sealing characteristic therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid device to be mounted on a container body containing hygroscopic contents, and a sealed container comprising the container body and the lid device.

[0002]

2. Description of the Related Art Hitherto, hygroscopic contents, for example, freeze-dried instant coffee and the like, are housed in a glass cylindrical container body, and the container body is sealed by screwing a lid.

Further, it has been considered that a hygroscopic content is housed in a synthetic resin container body having a flange portion, and a lid is attached to the flange portion to seal the container body. For example, as shown in FIG. 10, a container main body 10 containing a hygroscopic content and having a flange 15
There is known a hermetically sealed container including a seal film 32 having an easy-peeling property, which is heat-sealed to the flange portion 15, and a lid device 20 attached to the container body 10 from above the seal film 32.

In this case, the lid device 20 is provided with a flange 15
It has an engagement side wall 21 that engages with the outer periphery, and an upper plate 35 that is connected to the engagement side wall 21 and covers the opening of the container body 10.
The flange portion 15 of the container body 10 is locked between a projection 36 provided on the inner surface of the engagement side wall 21 and the upper plate 35.

[0005] In use, first, the lid device 20 is removed from the flange portion 15 of the container body 10, and then the seal film 32 is peeled off from the flange portion 15 so that the container body 10 is removed.
The contents inside are taken out.

Next, after the contents are taken out, the container body 1 is again taken out.
The lid device 20 is mounted on the flange portion 15 of the “0”.

[0007]

As described above, the seal film 32 is heat-sealed on the flange portion 15 of the container body 10 in advance, and the seal film 32 is formed on the outer peripheral portion 32a protruding outward from the flange portion 15. have.
The outer peripheral portion 32a is formed by the flange portion 15 and the engaging side wall 2.
1 is located.

However, after peeling off the seal film 32 from the flange portion 15 of the container body 10, a gap corresponding to the outer peripheral portion 32a of the seal film 32 is formed between the flange portion 15 and the engaging side wall 21, and There is play between the engagement side wall 15 and the engagement side wall 21 and proper fitting cannot be performed. In addition, from the gap between the flange portion 15 and the engagement side wall 21, outside air enters the container body 10 and the container body 10
May not be able to maintain moisture-proof properties.

On the other hand, it is conceivable to narrow the gap between the flange portion 15 and the engaging side wall 21 in advance. In this case, when the seal film 32 is mounted on the flange portion 15, The outer peripheral portion 32a is tightly clamped between the flange portion 15 and the engaging side wall 21.

[0010] The present invention has been made in view of such a point, and in any case before and after the sealing film is removed, the engagement between the container body and the lid device while maintaining the hermeticity is performed. It is an object of the present invention to provide a lid device and a hermetically sealed container that can be used.

[0011]

According to the first aspect of the present invention,
An engaging side wall that engages with the outer periphery of the flange portion provided at the opening of the container main body, and a lid main body that is connected to the engaging side wall and covers the opening of the container main body, is arranged vertically on the inner surface of the engaging side wall. A pair of protrusions are provided, and the inner diameter of the engagement side wall between the upper protrusion and the lower protrusion is larger than the inner diameter of the engagement side wall between the upper protrusion and the lid body. It is a lid device.

According to a second aspect of the present invention, there is provided the lid device according to the first aspect, wherein the lid body has an opening / closing plate that swings via a hinge.

According to a third aspect of the present invention, the lower surface of the lid body is
3. The lid device according to claim 1, wherein an inner ring that can abut the inner surface of the flange portion of the container body is provided.

According to a fourth aspect of the present invention, there is provided the lid device according to any one of the first to third aspects, wherein a contact ring is provided on the lower surface of the lid main body so as to be able to contact the upper surface of the flange portion.

According to a fifth aspect of the present invention, the upper and lower protrusions provided on the inner surface of the engagement side wall extend over the entire circumference of the engagement side wall. A lid device according to any one of the above.

According to a sixth aspect of the present invention, there is provided a container body having a flange portion provided in an opening, a seal film sealed to the flange portion and having an outer peripheral portion projecting outward from the flange portion, The lid device according to any one of claims 1 to 5, which is mounted from above the seal film,
A sealed container characterized by comprising:

According to the first and sixth aspects of the present invention, before the seal film is peeled off from the flange portion,
The flange portion engages between the upper protrusion and the lower protrusion,
An outer peripheral portion of the seal film is sandwiched between the flange portion and the engaging side wall. After peeling off the seal film from above the flange, the flange engages between the upper protrusion and the lid body. In this case, since the inner diameter of the engaging side wall between the upper protrusion and the lid main body is smaller than the inner diameter of the engaging side wall between the upper protrusion and the lower protrusion, it engages with the flange portion from which the seal film has been peeled off. The flange portion can be engaged while keeping the sealing property between the upper protrusion and the lid main body by closely contacting the side wall.

According to the second and sixth aspects of the present invention, the contents in the container body can be taken out from the opened opening and closing plate by swinging and opening the opening and closing plate of the lid body via the hinge. .

According to the third and sixth aspects of the present invention, since the inner ring of the lid main body abuts on the inner surface of the flange, the sealing performance between the flange of the container main body and the lid main body can be further improved. .

According to the fourth and sixth aspects of the invention, the sealing between the flange portion of the container body and the lid body is further improved by the contact ring of the lid body being in contact with the upper surface of the flange portion. Can be.

According to the fifth and sixth aspects of the present invention, the upper projection and the lower projection extend over the entire circumference of the engagement side wall, so that the distance between the flange of the container body and the lid body is increased. Sealing performance can be further improved.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings with reference to FIGS. First, the whole sealed container will be described with reference to FIGS.

As shown in FIGS. 2 and 3, the sealed container comprises a substantially rectangular cylindrical container body 10 and a lid device 20 mounted on the container body 10.

The container body 10 is shown in FIGS.
As shown in FIG. 5, the upper end is opened and a flange portion 15 is provided on the periphery of the upper end opening 10a. Further, a seal film 32 having an outer peripheral portion 32a protruding outward from the flange portion 15 is fixed to the flange portion 15 by heat sealing.

Further, as shown in FIG. 1, the lid device 20 includes an engaging side wall 2 which engages with the outer periphery of the flange portion 15 of the container body 10.
1, a peripheral plate 23 extending inward from the engaging side wall 21 and positioned above the flange portion 15, a rising portion 25 rising upward from the peripheral plate 23, a container body 10 extending inward from the rising portion 25, and And an upper plate 28 that covers the opening 10a.

As shown in FIGS. 1 and 2, the upper plate 2
Two swinging open / close plates 26 are connected to 8 via a hinge 27. That is, the opening 10a of the container body 10 is covered by the upper plate 28 connected to the rising portion 25, and the contents in the container body 10 are opened by swinging and opening the opening / closing plate 26 via the hinge 27. Open / close plate 26
Can be taken out from the part.

As shown in FIG. 1 and FIG.
A protrusion 26a protruding inward is provided at the tip of the protrusion. The protrusion 26a is adapted to engage with an engaging portion 25a provided at the upper end of the rising portion 25 so as to protrude outward.

In the above-described lid device 20, portions other than the engagement side wall 21, that is, the peripheral plate 23, the rising portion 2
5, the upper plate 28, and the opening / closing plate 26,
25, 28, and 26 are configured.

As shown in FIG. 1 and FIG.
A first projection 22 a and a second projection 22 b are provided on the inner surface of the first side wall 22. The first projection 22 a and the second projection 22 b are continuous with the entire inner surface of the engagement side wall 21. Extends to. The first protrusion 22a and the second protrusion 22b are not limited to extending over the entire inner surface of the engaging side wall 21, and may be provided intermittently over the entire inner surface of the engaging side wall 21. .

As shown in FIG. 1, the inner diameter L ₁ of the engagement side wall 21 between the first projection 22a and the second projection 22b is determined by the relationship between the first projection 22a and the peripheral plate 23. It is larger than the inner diameter L ₂ of the joint side wall 21. That is, the sealing film 3
Before peeling 2 from the flange portion 15, the flange portion 15
Is engaged between the first projection 22a and the second projection 22b, but after the seal film 32 is peeled off, the flange 15 is engaged between the first projection 22a and the peripheral plate 23. In this case, by increasing the inner diameter L ₁ than the inner diameter L _2,
Before peeling of the seal film 32, an outer peripheral portion 32a is interposed between the flange portion 15 and the engaging side wall 21, and after peeling of the seal film 32, the flange portion 15 and the engaging side wall 21 can be brought into close contact with each other. Irrespective of before and after peeling of the film 32, the flange portion 15 and the engaging side wall 21 can always be engaged while maintaining the sealing property. here,
The difference between the inner diameter L ₁ and the inner diameter L _2, generally, the sealing film 3
The thickness is about twice as large as the thickness of No. 2.

Further, as shown in FIG. 1, an inner ring 30 is provided on the lower surface of the peripheral plate 23 of the lid device 20 so as to be in contact with the inner surface of the flange portion 15 over the entire periphery of the peripheral plate 23. When the flange portion 15 is engaged between the peripheral plate 23 and the first protrusion 22a, a contact ring 29 that can contact the upper surface of the flange portion 15 is formed on the lower surface of the peripheral plate 23 on the entire periphery of the peripheral plate 23. Is provided across.

The lower end 30a of the inner ring 30 is
Is formed with R. Thus, the inner ring 30
Is formed at the lower end 30a of the inner ring 30, the lower end 30a of the inner ring 30 allows the seal film 32 to be formed.
The inner ring 30 can be prevented from scratching the inner ring 30 after the seal film 32 is peeled off.
a can be smoothly slid into the inner surface of the flange portion 15.

The lower end of the contact ring 29 has an angle of 20 ° to 80 °. When the contact ring 29 contacts the upper surface of the flange 15, the lower end of the contact ring 29 is easily crushed. ing.

Next, the material of each part will be described. First, the container body 10 is made of polypropylene (PP), polyethylene (PE), polystyrene (PS), acrylonitrile.
It is obtained by injecting a thermoplastic resin such as butadiene / styrene copolymer (ABS) and polycarbonate (PC). PP sheet, PE sheet, PS
The container body 10 may be manufactured by vacuum-forming a sheet made of polypropylene and a sheet made of polypropylene (PP) / saponified ethylene vinyl acetate copolymer (EVOH) / polypropylene (PP).

Further, the container body 10 may be manufactured by mounting a label material in an injection molding die and injecting a thermoplastic resin such as PP, PE or PS into the injection molding die. .

The in-mold molding will be described in more detail.
That is, the label material used in the in-mold molding generally comprises a printing base material layer, a gas barrier layer, and an adhesive layer with an injection resin. Each of these layers can be formed independently by forming a film and laminating (dry lamination) via an adhesive, or by melt-extruding (EC, co-extrusion) a part or all of the layers. . Further, the printing base material layer can be omitted according to the use and purpose.

The film as the printing base material layer is not particularly limited as long as it is generally printable, and for example, a polyester film, a polypropylene film, a nylon film and the like can be appropriately used.

As the gas barrier layer, for example, (a)
Aluminum foil (7 to 25 μm), (b) a metal or metal oxide laminated on a plastic film or the like by vapor deposition or the like, for example, silicon oxide vapor-deposited plastic film, aluminum oxide vapor-deposited plastic film, aluminum vapor-deposited plastic film, (c) In addition, polyacrylonitrile resin,
Examples include saponified ethylene vinyl acetate copolymer (EVOH), polyvinylidene chloride film (PVDC), and PVDC-coated biaxially stretched plastic film, which can be appropriately selected according to desired performance.

The adhesive layer is not particularly limited as long as it adheres to the injection resin, but is usually a plastic of the same material as the injection resin or an ethylene-vinyl acetate copolymer (E).
VA) containing adhesive resin such as polyethylene,
Alternatively, a plastic film or the like in which those resins are co-extruded or coated is preferably used.

Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method, or another coating method according to a conventional method.

Further, for the in-mold label container body of the present invention, a thermoplastic resin which can be injection-molded, for example, polypropylene, polyethylene, polystyrene or the like can be used.

The lid device 20 is made of PP, PE, PS, A
It is produced by injection molding a thermoplastic resin such as BS and PC.

It is preferable that the material of the lid device 20 is softer than that of the container body 10, and in this case, the container body 1
The lid device 20 can be easily fitted into the zero flange portion 15. For example, when both the lid device 20 and the container body 10 are made of PP, it is preferable that the lid device 20 be made of soft PP.

Further, the sealing film 32 is made of PET.
It can be manufactured from a layer having a layer structure of 12 μm / Al layer 30 μm / sealant layer 25 μm. As the sealant layer, Tonen EPL11 can be used.

Next, the operation of the present embodiment having the above configuration will be described.

First, as shown in FIG. 1, a hygroscopic content, for example, freeze-dried instant coffee or the like is stored in a container body 10 having an opening 10a.
The seal film 32 is fixed on the 0 flange portion 15 by heat sealing. In this case, the sealing film 32
Of the flange portion 15 protrudes outward from the flange portion 15.

Next, the engaging side wall 21 of the lid device 20 is fitted into the flange portion 15 of the container body 10, and the flange portion 1
5 engages between the first projection 22a and the second projection 22b of the engagement side wall 21, and the lid device 20 is attached to the container body 10. In this case, the outer peripheral portion 32a of the seal film 32 is interposed between the flange portion 15 and the engaging side wall 21 to maintain the sealing property between the flange portion 15 and the engaging side wall 21 (FIG. 1).
Solid line position).

Since the inner diameter L ₁ is larger than the inner diameter L ₂ as described above, the flange 15 is engaged between the first protrusion 22 a and the second protrusion 22 b before the peeling of the seal film 32. In this case, even if the outer peripheral portion 32a of the seal film 32 intervenes between the flange portion 15 and the engaging side wall 21, the flange portion 15 and the engaging side wall 21 do not become particularly tight.

In this state, another container body 10 is stacked on the lid device 20 mounted on the container body 10 (see FIG. 1).

In use, the lid device 20 is removed from the container body 10 and the seal film 32 is peeled off from the flange 15 of the container body 10. Thereafter, the lid device 20 is attached to the container body 10 again. In this case, the flange portion 15 of the container body 10 is engaged between the first projection 22a and the peripheral plate 23 (the position indicated by the two-dot chain line in FIG. 1). At the same time, the inner ring 30 provided on the lower surface of the peripheral plate 23 comes into contact with the inner surface of the flange portion 15, and the contact ring 29 comes into contact with the upper surface of the flange portion 15. Thus, the flange portion 15 of the container body 10 and the lid device 20 And the hermeticity between them is ensured.

The inner diameter L ₂ of the engagement side wall 21 between the first projection 22a and the peripheral plate 23 is the inner diameter L ₁ of the engagement side wall 21 between the first projection 22a and the second projection 22b. Since it is smaller, the sealing performance between the flange portion 15 engaged between the first projection 22a and the peripheral plate 23 and the engagement side wall 21 can be enhanced.

Thereafter, the opening / closing plate 26 swings via the hinge 27, and the contents are taken out from the opened portion of the opening / closing plate 26.

[0053]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the present invention will be described with reference to the accompanying drawings. The present embodiment mainly relates to the container body 10.
Is specifically described. <First Embodiment> In a first embodiment of the present invention, polypropylene is used as a material of an injection resin for the container body 10, and a polyethylene terephthalate film (12 μm) / aluminum foil (15 μm) / polypropylene film ( (60 μm) was used. This label material is PET, the outermost layer
After printing characters, patterns, etc. on the film, laminating an aluminum foil as a barrier layer using an adhesive, and forming a three-layer film by laminating a polypropylene film as an innermost layer using an adhesive, a predetermined film is formed. It was punched into a shape (the side label was a fan shape, and the bottom label was a circle with a gate hole in the center).

Next, as shown in FIG. 4, the label material (side label 1 and bottom label 2) is placed on the side and bottom of the female mold 3, and the male mold 4 is pushed in from above. The resin 7 was injected into the cavity through the gate hole of the bottom label 2 corresponding to the gate position, and ordinary in-mold label injection molding was performed.

As a result of measuring the barrier properties of the obtained molded container, values of oxygen permeability and moisture permeability as shown in Table 1 were obtained.

Since the innermost layer of the label material is made of the same material as the resin of the container body, the label material and the container body can be integrated without using an adhesive. Table 1 Barrier layer Oxygen permeability Water vapor permeability (cm ³ / pkg ・ day ・ atm) * (g / pkg ・ day) * Silicon oxide deposited PET 0.07 0.0041 Polyvinylidene chloride 0.08 0.0043 Film Aluminum foil 0.06 0.00088 None 6.70 0.01 *) Measuring method: Oxygen permeability: temperature 23 ° C , Humidity 90% RH, purge 3 days MOCON company OXTRAN use Water vapor permeability ・ ・ ・ Calcium chloride gravimetric method, measurement 6 days, temperature 40 ° C, humidity 90% RH In addition, polypropylene is used as the material of the injection resin to be the container body In addition, as the label material, in addition to the above, a film having the following layer configuration was used in order from the outermost to the innermost.

Stretched polypropylene film (printing substrate) (25 μm) / aluminum foil (barrier layer) (15 μm)
m) / stretched polypropylene film (heat-sealing layer) (adhesive layer) (25 μm), stretched polypropylene film (printing substrate) (25 μm)
m) / polyethylene terephthalate film deposited with silicon oxide (barrier layer) (12 μm) / stretched polypropylene film having heat seal layer (adhesive layer) (25 μm)
m), unstretched polypropylene film (30 μm) / polyethylene terephthalate film (printing substrate) (12
μm) / polyethylene terephthalate film (barrier layer) (12 μm) / unstretched polypropylene film (adhesive layer) (30 μm), stretched polypropylene film (25 μm) / polyethylene terephthalate film (printing substrate) (12 μm)
m) / polyethylene terephthalate film deposited with silicon oxide (barrier layer) (12 μm) / stretched polypropylene film having heat seal layer (adhesive layer) (25 μm)
m), unstretched polypropylene film (30 μm) / polyethylene terephthalate film (printing substrate) (12
μm) / aluminum foil (barrier layer) (9 μm) / polyethylene terephthalate film (12 μm) / unstretched polypropylene film (adhesive layer) (30 μm).

Generally, when a label material is punched into a predetermined shape and then arranged on the side and bottom surfaces of the female mold 3, the size of the curl of the label material affects the yield of injection molding. That is, the smaller the curl of the label material, the better the yield.

Further, in order to reduce the curl of the label material, it is preferable that the layer structure of the label material is a symmetrical layer structure centering on the central layer.

In the label material having the above-mentioned layer structure, a symmetrical layer structure can be formed with the center layer as the center, and the label material can also be a polyethylene terephthalate film or a silicon oxide-deposited polyethylene terephthalate film formed of one polyethylene. Considering a terephthalate film, it has a symmetrical layer structure. Therefore, curling of the label material at the time of punching could be reduced. In addition, in the case of the label material having the layer constitutions of (1) to (4), both the gas barrier properties and the adhesion to the injection resin were good.

When the lid device 20 was attached to the container body 10 thus manufactured, a sealed container having a good sealing property was obtained. <Second Embodiment> In a second embodiment of the present invention, FIG.
As shown in the figure, a label material similar to that of the first embodiment is used, the side label 1 is arranged on the side of the male mold 3, and a circular bottom label having no gate hole 6 (see FIG. 4) at the center. 2
Was placed on the top surface of the male mold 4 to perform in-mold label injection molding. In this embodiment, since the bottom label 2 does not have the gate hole 6, when the resin 7 is injected, the cavity is filled with the resin while the bottom label 2 is pressed against the core (male mold 4). Therefore, in the molded product, a label having no gate hole 6 is laminated on the bottom surface in the container, and the barrier properties are further improved (see Table 2). In the present embodiment, when a gate hole is provided in the bottom label 2 (a hole punching step is required after punching the outer periphery of the label, the accuracy of the outer periphery punching and the hole punching is required. Required), the processing of the label material becomes easier. Table 2 Barrier layer Oxygen permeability Water vapor permeability (cm ³ / pkg ・ day ・ atm) (g / pkg ・ day) Silicon oxide-deposited PET 0.05 0.0001 Polyvinylidene chloride 0.05 0.0001 Film aluminum foil 0.04 0.0001 When the lid device 20 was attached to the container body 10 thus manufactured, the container was sealed. A well-sealed container was obtained. <Third Embodiment> In a third embodiment of the present invention, FIG.
As shown in FIG. 5, a female mold 3 using the same label material as in the first embodiment and having a vacuum suction hole 8 (position 8 'in the conventional apparatus) provided at a position where the bottom cavity and the side cavity intersect with each other is used. Was used to perform in-mold label injection molding. In the present embodiment, since the side label 1 can be prevented from being bulged when the resin is injected, it is possible to prevent the molded side label 1 from being wrinkled or overlapped.

When the lid device 20 was attached to the container body 10 thus manufactured, a hermetically sealed container was obtained. <Fourth Embodiment> In a fourth embodiment of the present invention, FIG.
As shown in (A) and (B), the same label material as in the first embodiment is used, and the total height of the side cavity of the mold (accurately, the length along the side wall) is LH. When the inner circumference of the female mold is LR (however, it gradually decreases from the top to the bottom), the height L1 and the circumferential length L2 of the side label are L1 = LH -1 and L2 = LR -1 (mm, respectively). ), In-mold label injection molding was performed. In this embodiment, since the label size is set short, it is possible to prevent the occurrence of wrinkles, overlaps and the like. In particular, since the lower end of the label does not come into contact with the bottom of the side cavity when the male mold is pushed in after the side label 1 is inserted into the female mold, the label is laminated in close contact with the container body without waving. As a result, as shown in FIG. 7C, the obtained molded containers 10 are stacked with a predetermined gap d in the side label 1, but have little effect on the gas barrier property.

When the lid device 20 was attached to the container body 10 thus manufactured, a sealed container having a good sealing property was obtained. <Fifth Embodiment> In a fifth embodiment of the present invention, FIG.
As shown in the figure, the same label material as in the first embodiment is used, and the reinforcing rib 1 is provided at a predetermined position on the leg of the container body 10.
1 and in-mold label injection molding was performed. The reinforcing rib 11 can prevent the label from peeling off due to a difference in shrinkage due to a difference in material between the container body 10 and the label.

In particular, in the case of a rectangular container, it is preferable to provide a rib at each center point of the four sides of the leg.

When the lid device 20 was attached to the container body 10 thus manufactured, a hermetically sealed container was obtained. <Sixth Embodiment> In a sixth embodiment of the present invention, a polystyrene resin is used as an injection resin to be a container body, and a label material has a layer structure of polypropylene / adhesive / polyvinylidene chloride / adhesive / polypropylene. Using a co-extruded film (thickness: 60 μm), printing was performed on the innermost layer side of the label, and an EVA resin (heat sealing agent) was further coated thereon by a gravure coating method. Then, as shown in FIG. 9, a portion where the bottom cavity and the side cavity intersect (numbers 12 and 1 in FIG. 9).
Mold with curvature corresponding to 3) (female mold 3 and male mold 4)
Was used for in-mold label injection molding. Since the mold has a curvature, the resin injection pressure on the label decreases, and the ink layer and the heat seal layer of the label can prevent "flow" due to friction or the like. In addition, the above-mentioned portion becomes relatively thick, and it is preferable to keep the thickness to 1.5 times or less in order to prevent “sink” caused by the difference in thickness after cooling.

When the lid device 20 was attached to the container body 10 thus manufactured, a hermetically sealed container was obtained.

[0067]

As described above, according to the present invention, the sealing performance is maintained between the flange portion of the container body and the lid device before and after the sealing film is removed from the flange portion of the container body. Can be engaged. Therefore, even when the hygroscopic content is stored in the container body, the content can be stored appropriately for a long period of time.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a sealed container according to the present invention.

FIG. 2 is a plan view of a sealed container.

FIG. 3 is a side view of a sealed container.

FIG. 4 is an explanatory view illustrating a method for producing the in-mold label container of the present invention.

FIG. 5 is an explanatory view of a second embodiment of the present invention.

FIG. 6 is an explanatory view of a third embodiment of the present invention.

FIGS. 7A to 7C are explanatory diagrams of a fourth embodiment of the present invention.

FIG. 8 is an explanatory view of a fifth embodiment of the present invention.

FIG. 9 is an explanatory view of a sixth embodiment of the present invention.

FIG. 10 is an enlarged sectional view showing a conventional container body and a lid device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Container main body 15 Flange part 20 Lid device 21 Engagement side wall 22a 1st protrusion 22b 2nd protrusion 23 Peripheral plate 25 Rise 26 Opening / closing plate 27 Hinge 28 Upper plate 29 Contact ring 30 Inner ring

Continued on the front page F term (reference) 3E067 AA05 AB23 BA02A BB14A BB15A BB16A BC06A BC07A EA06 EA32 EB27 FA01 FC01 3E084 AA02 AA14 AA24 AA25 AA26 AB07 BA03 BA06 BA08 BA09 CA03 CC03 CC04 CC05 DA03 DC03 GA03 DC03 GB08 GB12 HA03 HB02 HD01 KB10 LA01 LA18 LB03 LB05

Claims (6)

[Claims] An engaging side wall is provided on an opening of a container main body, the engaging side wall is engaged with an outer periphery of a flange portion, and a lid main body is connected to the engaging side wall to cover an opening of the container main body. A pair of protrusions are provided side by side in the vertical direction, and the inner diameter of the engagement side wall between the upper protrusion and the lower protrusion is larger than the inner diameter of the engagement side wall between the upper protrusion and the lid body. A lid device. 2. The lid device according to claim 1, wherein the lid main body has an opening / closing plate that swings via a hinge. 3. The lid device according to claim 1, wherein an inner ring is provided on a lower surface of the lid body so as to be in contact with an inner surface of the flange portion of the container body. 4. A contact ring provided on the lower surface of the lid main body, the contact ring being capable of contacting the upper surface of the flange portion.
4. A lid device according to any one of claims 3 to 3. 5. The lid according to claim 1, wherein the upper projection and the lower projection provided on the inner surface of the engagement side wall extend over the entire circumference of the engagement side wall. apparatus. 6. A container body having a flange portion provided in an opening, a seal film sealed to the flange portion and having an outer peripheral portion protruding outward from the flange portion, and mounted on the container body from above the seal film. A sealed container, comprising: the lid device according to any one of claims 1 to 5.