JP2000142744A - Lid device and sealed container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a flange part and a lid device to be engaged to each other while their sealing characteristic being kept after a lid device is properly engaged with and held at the flange part of a container main body and a seal film is taken out. SOLUTION: An engaging sidewall 21 of a lid device 20 is installed at a flange 15 of a container main body 10. In the case that a sheet film 32 is heat sealed on the flange 15, the flange 15 is engaged between a first protrusion 22a having a high protruding height and a second protrusion 22b having a low protruding height and property held. An outer circumference 32a of the seal film 32 is held between the flange 15 and the engaging sidewall 21. After the seal film 32 is peeled from the flange 15, the first protrusion 22a and the second protrusion 22b pass through a recess of the flange 15. The flange 15 reaches up to a circumferential edge plate 23. The lid device 20 is rotated in respect to the container main body 10; thereby the flange 15 is sealingly engaged between the first protrusion 22a and the circumferential edge 23 so as to hold their sealing characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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. 9, a container main body 10 containing a hygroscopic content and having a flange portion 15 is provided.
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 sealed container that can be used.

[0011]

According to the first aspect of the present invention,
A cylindrical container body having a circular flange portion at an upper end opening, a seal film fixed to the flange portion of the container body, a circumferential engagement side wall engaging with the flange portion of the container body, and A lid device that is connected and has an opening / closing lid that is swingably connected to the peripheral plate via a hinge portion and that covers the opening of the container body, and a lid device having an opening / closing lid that covers the opening of the container body; An upper projection having a large projection height and a lower projection having a small projection height are provided in a predetermined arrangement position on the inner peripheral surface, and correspond to the upper projection and the lower projection of the flange portion. A sealed container characterized by having a notch at a position.

According to a second aspect of the present invention, there is provided the sealed container according to the first aspect, wherein a stopper is provided on the lower surface of the flange portion so as to contact the upper projection.

According to a third aspect of the present invention, a slope is formed on a lower surface of the flange portion so as to extend in a circumferential direction from the notch end toward the stopper and gradually increase the thickness of the flange portion. 2. The sealed container according to 2.

According to a fourth aspect of the present invention, in the sealed container according to the first aspect, the upper surface of the flange portion descends radially outward so as to gradually reduce the thickness of the flange portion. is there.

According to a fifth aspect of the present invention, a plurality of upper projections and lower projections are provided on the inner peripheral surface of the engaging side wall at uneven intervals in the circumferential direction. It is a sealed container.

According to the first aspect of the present invention, before the seal film is peeled off from the flange, the flange is mounted shallowly on the lid device, and the flange has an upper projection having a large projection height and a projection having a large projection height. Engaged with a small lower projection. At the time of use, the seal film is peeled off from the flange portion, the upper projection and the lower projection pass through the notch of the flange portion, and the flange portion reaches the peripheral plate. Thereafter, the lid device is rotated with respect to the container body, the flange portion is sandwiched between the peripheral plate and the upper protrusion, and the lid device is mounted on the flange portion while keeping the airtightness. When taking out the contents, the opening / closing lid is opened via the hinge part, and the contents in the container body are taken out from the opened opening / closing lid.

According to the second aspect of the present invention, when the lid device rotates with respect to the container body, the upper projection of the lid device comes into contact with the stopper on the lower surface of the flange portion, thereby stopping the rotation of the lid device. The position is determined.

According to the third aspect of the present invention, the slope is formed on the lower surface of the flange portion so as to gradually increase the thickness of the flange portion. And the upper protrusion.

According to the fourth aspect of the present invention, since the upper surface of the flange portion is lowered outward in the radial direction, no seal film mark is left on the outer portion of the flange portion. Therefore, by tightly contacting the outer portion and the peripheral plate, the sealing performance between the flange portion and the lid device can be further improved.

According to the fifth aspect of the present invention, since the upper protrusion and the lower protrusion are provided on the inner peripheral surface of the engaging side wall at uneven intervals in the circumferential direction, the seal film is peeled off. If the flange part is mounted shallowly on the lid device before performing, the upper protrusion and the lower protrusion pass through the notch of the flange part, the flange part reaches the peripheral plate, thereby reducing the probability of damaging the seal film. Can be.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of a sealed container according to the present invention.

First, the entire sealed container will be described with reference to FIG. As shown in FIG. 7, the sealed container includes a cylindrical container body 10 (see FIG. 4) having a circular flange portion 15 at an upper end opening, and a lid device 20 attached to the flange portion 15 of the container body 10. Have.

As shown in FIGS. 1 to 3, the lid device 20 is engaged with the flange 15 of the container body 10 and extends circumferentially.
1 and a doughnut-shaped peripheral plate 23 located above the flange portion 15. An opening / closing lid 25 that covers the opening of the container body 10 is swingably connected to the peripheral plate 23 via a hinge portion 26. Further, the opening / closing lid 25 is provided with a circumferential projection 27 that engages with the inner peripheral edge of the peripheral plate 23. By engaging the peripheral projection 27 with the inner peripheral edge of the peripheral plate 23, the container body 10 is opened by the opening / closing lid 25. Can be completely sealed.

As shown in FIG. 1, a first projection 22a and a second projection 22b are formed on the inner peripheral surface of the engagement side wall 21 of the lid body 20.
Are provided side by side in the vertical direction. These first projections 2
The plurality of (for example, four) 2a and the second protrusions 22b are provided at predetermined positions on the inner peripheral surface of the engagement side wall 21, respectively.

The first projection 22a and the second projection 22b have different projection heights. As shown in FIG. 1, the projection height of the first projection 22a is larger than the projection height of the second projection 22b. It is getting bigger. The flange portion 15 engaging with the engagement side wall 21 is located between the first projection 22a and the second projection 22b.
Alternatively, it is adapted to be engaged between the peripheral plate 23 and the first projection 22a.

Next, the structure of the container body 10 will be described below. As shown in FIG.
A seal film 32 is heat-sealed and fixed thereon. The seal film 32 is to be heat-sealed on the upper surface of the flange portion 15 after storing the contents in the container body 10, and has an outer peripheral portion 32 a protruding outward from the flange portion 15.

The first projection 22a and the second projection 22b of the lid device 20 of the flange 15 of the container body 10 are also provided.
Is formed at a position corresponding to the first projection 22a and the second projection 22b. In the present embodiment, the first projection 22a and the second projection 22
b has an uneven spacing on the inner peripheral surface of the engagement side wall 21;
For example, they are arranged at intervals of 78 °, 94 °, 86 °, 102 °, and correspondingly, the notches 15a of the flange portion 15 are also arranged at intervals of 78 °, 94 °, 86 °, 102 °. (See FIG. 5).

As shown in FIGS. 5 and 6, on the lower surface of the flange portion 15, there are provided four stoppers 16 with which the first protrusions 22a of the engagement side wall 21 abut. Further, a slope 17 is formed on the lower surface of the flange portion 15 and extends in the circumferential direction from the end of the notch 15a toward the stopper 16. The slope 17 reduces the thickness of the flange portion 15 from the end of the notch 15a to the stopper 16. It gradually increases toward the side. Also, as shown in FIG. 1, the upper surface of the flange portion 15 faces outward in the radial direction.
The thickness is gradually decreasing so as to decrease. By thus lowering the upper surface of the flange portion 15 outward in the radial direction, the seal film 32 can be fixed only to the radially inner side of the flange portion 15. Therefore, even after the seal film 32 is peeled off, the outer portion 33 of the flange portion 15 can be cleaned without leaving any trace of peeling.

As shown in FIG. 1, the height of the notch 15a of the flange portion 15 is different from the height of the projection of the first projection 22a.
The size is about the middle of the height of the protrusion 22b. Next, the material of each part will be described. First, the container body 10
Are polypropylene (PP), polyethylene (PE),
It is obtained by injecting a thermoplastic resin such as polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), and polycarbonate (PC). PP sheet, PE sheet, PS sheet,
And polypropylene (PP) / saponified ethylene vinyl acetate copolymer (EVOH) / polypropylene (PP)
The container main body 10 may be manufactured by vacuum forming a sheet made of a material.

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 or 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. When the lid device 20 is made of PP, for example, MG474 manufactured by Nippon Polyolefin Co., Ltd. is used as PP.
Can be used.

The material of the lid device 20 is preferably 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, a hygroscopic content such as instant coffee is stored in the container body 10, for example.
Thereafter, the sealing film 32 is heat-sealed to the flange portion 15 of the container body 10 (heat sealing conditions 18).
(0 ° C. × 1.5 seconds).

Next, the lid device 20 is mounted on the flange portion 15 of the container body 10. In this case, the lid device 20 is mounted shallowly with respect to the flange portion 15 of the container body 15, and the flange portion 15 is engaged between the first protrusion 22a and the second protrusion 22b (solid line position in FIG. 1). .

In the present embodiment, the notches 15a of the flange portion 15 are provided at uneven intervals as described above, so that when the lid device 20 is mounted shallowly to the flange portion 15, the notch 15a is in the first position. Projection 22a and Second Projection 22
The position is adjusted to the position corresponding to b, whereby the probability that the flange portion 15 reaches the position between the first protrusion 22a and the peripheral plate 23 is reduced.

That is, for example, the notch 1 of the flange portion 15
If 5a are provided at equal intervals of 90 °, 90
The notch 15a is aligned with the first protrusion 22a and the second protrusion 22b at intervals of °, and in this case, the flange 15 reaches between the first protrusion 22a and the peripheral plate 23. As a result, the second protruding portion 22b and the flange portion 15 cannot be locked, so that the lid device 20 is in a free state and falls off.

On the other hand, according to the present invention, since the notches 15a of the flange portion 15 are provided at uneven intervals, the notch 15a, the first protrusion 22a, and the second protrusion 22b are provided.
Is performed only at one position. For this reason, the probability of alignment between the notch 15a and the first projection 22a and the second projection 22b is extremely low, and the second projection 22b and the flange 15 cannot be locked, so that the lid device 20 is in a free state and falls off. Probability decreases.

The user removes the lid device 20 from the flange 15 of the container body 10 and peels off the seal film 32 from the flange 15. Next, the container body 10 and the lid device 2
The notch 11a of the flange portion 15 is aligned with the first protrusion 22a and the second protrusion 22b by aligning a matching mark (not shown) provided on each of the flanges 15 with the lid device 20. Attach deeply. In this case, the flange portion 15
It reaches the peripheral plate 23 of the lid device 20 (the position indicated by the two-dot chain line in FIG. 1).

Next, the lid device 20 is rotated with respect to the flange portion 15. In this case, the first protrusion 22a of the engagement side wall 21
Slides along the slope 17 of the flange portion 15, and then the first protrusion 22a comes into contact with the stopper 16 of the flange portion 15 to stop the rotation of the lid device 20. While the first protrusion 22a slides along the slope 17, the thickness of the flange portion 15 sandwiched between the first protrusion 22a and the peripheral plate 23 gradually increases, so that the upper surface of the flange portion 15 is formed. Is the peripheral plate 23
Contact portion 23a. Therefore, the sealing performance between the flange 15 and the lid device 20 can be improved.

Further, since the flange portion 15 is lowered outward in the radial direction, no peeling mark of the seal film is left on the outer portion 33 of the flange portion 15. For this reason,
The outer portion 33 and the contact portion 23a of the peripheral plate 23 are brought into close contact with each other, so that the sealing performance between the flange portion 15 and the lid device 20 can be further improved. That is, the peeling surface of the seal film generally has a rough surface, and when the peeling trace is brought into contact with the peripheral plate 23, the sealing performance is deteriorated. Since no peeling mark of the seal film is left on the outer peripheral portion 33, the outer portion 33 and the contact portion 23 a of the peripheral plate 23 can be in close contact with each other. Thus, the lid device 2 of the flange portion 15
Since the sealing property between 0 and 0 can be improved, the hygroscopic content does not solidify.

When taking out the contents, the opening / closing lid 25 is swung open via the hinge part 26 to open it.
The contents can be taken out from the tapered portion 37 formed on the peripheral plate 23 in a state in which is opened. After the contents are taken out, the opening / closing lid 25 is closed, but the opening / closing lid 25 can be fixed by engaging the engaging portion 34a provided at the tip thereof with the engaging portion 34b. 23 and open / close lid 25
The tightness of the circumferential projection 27 is strengthened and the sealing performance is improved.

[0049]

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 the first embodiment of the present invention, polypropylene (MG870 made by Nippon Polypropylene) is used as the material of the injection resin to be the container body 10, and an unstretched polypropylene film (30 μm) /
Polyethylene terephthalate film (12 μm) / polyethylene terephthalate film (12
μm) / unstretched polypropylene film (30 μm). This label material is the outermost layer, after printing characters and patterns on the unstretched PP film, and then laminating the PET film using an adhesive, and the silicon oxide-deposited PET film as the barrier layer, and then forming the innermost layer. A three-layer film is formed by laminating an unstretched polypropylene film using an adhesive,
The sheet was punched into a predetermined shape (the side label was a sector shape, and the bottom label was a circle having a gate hole at the center). Next, as shown in FIG. 8, the label material (side label 1 and bottom label 2) is arranged on the side and bottom of the female die 3, and the male die 4 is pushed in from above. The resin 7 was injected into the cavity through a corresponding gate hole of the bottom label 2), 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 vapor deposited PET 0.07 0.0041 None 6.70 0.01 *) Measuring method: Oxygen permeability ・ ・ ・ Temperature 23 ° C, Humidity 90% RH, Purge 3 days MOCON company OXTRAN used Water vapor permeability -Calcium chloride gravimetric method, measurement: 6 days, temperature: 40 ° C, humidity: 90% RH When the lid device 20 was attached to the container body 10 thus manufactured, a sealed container having good hermeticity was obtained. When the sealing film 32 was peeled off and the lid device 20 was remounted, a sealed container having good after-sealability was obtained.

[0052]

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, in any case where the hygroscopic content is stored in the container main 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 showing an engagement state between a flange portion of a sealed container and a lid device according to the present invention.

FIG. 2 is a plan view showing an open state of the lid device.

FIG. 3 is a side sectional view showing an open state of the lid device.

FIG. 4 is a partial sectional side view showing a container body.

FIG. 5 is a plan view showing the container body.

FIG. 6 is a diagram showing a stopper and a slope of a flange portion.

FIG. 7 is an overall schematic view of a sealed container.

FIG. 8 is an explanatory diagram for explaining a method for producing the in-mold label container of the present invention.

FIG. 9 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 16 Stopper 17 Slope 20 Lid device 21 Engagement side wall 22a 1st protrusion 22b 2nd protrusion 23 Peripheral plate 25 Opening / closing lid 26 Hinge part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenji Kato 1-1-1 Ichigaya Kagacho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. 3E084 AA02 AA12 AA24 AA25 AA26 AB07 BA03 BA06 BA08 BA09 CA01 CC03 CC04 CC05 DA01 DB09 DB12 DC03 DC04 DC05 FA03 FA09 FB01 FB05 FB06 FD13 GA02 GB02 GB06

Claims (5)

[Claims] A cylindrical container body having a circular flange portion at an upper end opening; a seal film fixed to the flange portion of the container body; a circumferential engaging side wall engaged with the flange portion of the container body; A lid device having a peripheral plate connected to the engagement side wall and located above the flange portion, and an opening / closing lid that is swingably connected to the peripheral plate via a hinge portion and covers an opening of the container body. An upper protruding portion having a large protruding height and a lower protruding portion having a small protruding height are provided at predetermined positions on the inner peripheral surface of the engagement side wall, and the upper protruding portion and the lower protruding portion of the flange portion are provided. A sealed container, wherein a notch is provided at a position corresponding to a projection. 2. The sealed container according to claim 1, wherein a stopper is provided on the lower surface of the flange portion so as to contact the upper projection. 3. A slope extending circumferentially from a notch end to a stopper side to gradually increase the thickness of the flange portion is formed on a lower surface of the flange portion.
A sealed container as described. 4. The sealed container according to claim 1, wherein the upper surface of the flange portion descends radially outward so as to gradually reduce the thickness of the flange portion. 5. The sealed container according to claim 1, wherein a plurality of upper projections and lower projections are provided on the inner peripheral surface of the engaging side wall at uneven intervals in the circumferential direction.