JP2009029441A - Packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container capable of preventing any liquid leakage from a container body even when a closing film is peeled off. <P>SOLUTION: The packaging container is composed of the container body 1 having an upwardly projecting container flange part 4 on a peripheral edge of an opening, and a lid 2 having a lid flange part 11 to be fitted to the container flange part 4 on a peripheral edge of a top face part 10 and having a skirt part 12 hanging downwardly from an outer peripheral edge of the lid flange part 11. In the packaging container, two stage fittings are allowed, i.e., the inner fitting in which the lid flange part 11 is fitted to the container flange part 4, the top face part 10 of the lid 2 is below a top face part 4c of the container flange part 4, and the outer fitting in which a locking part 5 formed on an outer peripheral wall 4b of the container flange part 4 and a locked part 15 formed on a lower part of the skirt part 12 are engaged with each other, and the top face part 10 of the lid 2 is above the top face part 4c of the container flange part 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging container provided with a lid.

In Patent Document 1, the upper end opening of the container body is closed with a hot-melt adhesive so as to be peeled off by a closing film formed by laminating a gas-permeable microporous polypropylene film on paper, and a container cap is placed thereon. A packaging container detachably fitted is described. Carbon dioxide gas generated as the fermentation progresses inside the container is naturally permeated through the closure film and discharged from the fitting part of the cap, preventing deformation of the packaging container, leakage of moisture, etc. and invasion of fungi. Debris is preserved.
Japanese Utility Model Publication No. 5-94166

  However, if the cap is closed after the consumer peels off the closure film after purchase, the fitting between the cap and the container body will be weakened by the thickness of the closure film, resulting in liquid leakage and odor from the container body. Leakage may occur.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a packaging container that can prevent liquid leakage from the container body even when the closing film is peeled off.

  In order to achieve the above object, according to the present invention, a container main body having a container flange portion protruding upward at the periphery of the opening and a lid flange portion that fits the container flange portion at the periphery of the top surface portion are formed. And a lid having a skirt portion that hangs downward from the outer peripheral edge of the lid flange portion, the lid flange portion is fitted to the container flange portion, and the top surface portion of the lid is positioned below the top surface portion of the container flange portion. The inner fitting, the locking part formed on the outer peripheral wall of the container flange part, and the locked part formed on the lower part of the skirt part are engaged, and the top surface part of the lid is the container flange part. The packaging container is capable of two-stage fitting with an outer fitting that is located above the top surface portion.

  According to such a configuration, the top surface portion of the lid is positioned above the top surface portion of the container flange portion at the time of external fitting, so that the closing film is applied to the top surface portion of the container flange portion so as to cover the opening of the container body. Even if it sticks, the latching | locking part of a container flange part and the to-be-latched part of a skirt part engage, and a lid | cover can be fitted (shallow fitting).

  In the state where the closing film is pasted, the inner side wall of the lid flange portion and the inner side of the container flange portion are formed by pushing the lid further downward and fitting the container flange portion to the lid flange portion to make an inner fit. Since the peripheral wall is in close contact, it can be in a sealed state. Therefore, liquid leakage and odor leakage can be prevented even if the blocking film is peeled off (deep fitting).

  In addition, "top surface portion" when "the top surface portion of the lid is positioned below the top surface portion of the container flange portion" or "the top surface portion of the lid is positioned above the top surface portion of the container flange portion" The lowest part of the top surface surrounded by the lid flange.

  Further, at least two ribs are formed in the circumferential direction on the top surface portion of the container flange portion, the outermost rib is formed continuously, and the other ribs are formed intermittently to form a plurality of recesses. Have. That is, a container main body having a container flange portion on the periphery of the opening, a lid having a lid flange portion fitted to the container flange portion on the periphery of the top surface portion, and / or the top surface portion of the container flange portion so as to cover the opening of the container main body. A packaging film composed of a closure film adhered to the container, wherein at least two ribs are formed circumferentially on the top surface of the container flange, and the outermost rib is continuously formed. The other ribs are formed intermittently and thus have a plurality of recesses. According to this configuration, even if the liquid in the container body passes over the inner ribs, the liquid falls into the grooves between the ribs, so that the grooves are guided into the container body from the concave portions of the inner ribs. It will be. Therefore, it is difficult for liquid to leak from the container body.

  The number and arrangement of the recesses are not limited. However, when one rib is provided, the effect of returning the liquid that has entered the groove between the ribs into the container body is low, and when there are many one rib, Since the possibility of leaking out is higher than the action of returning the liquid into the container body, for example, only the corner of the container, or near the middle between the corner of the container and the corner Thus, it is preferable to provide them at an appropriate interval. In addition, since the liquid tends to accumulate at the corners of the container body, the liquid can be effectively returned to the container body by providing the corners with the recesses. Further, a knob for peeling off the closing film is often formed at the corner, and the liquid can be prevented from splashing when opened from there.

  Moreover, it is preferable to form the groove so as to be gradually inclined downward toward the recess. For example, the container body is configured to be inclined downward gradually from the middle position of each piece of the container body toward the concave portions at the four corners. Or it is good also as a structure which makes the intermediate position of a recessed part and the recessed part adjacent to this the highest position, and descends | falls gradually toward each recessed part from there. Thus, the drainage property in the groove can be improved by inclining the groove.

  Here, when the contents to be stored in the packaging container are those that generate gas along with fermentation and aging such as fermented foods such as kimchi, miso, natto, and yogurt, the generated gas is removed from the container body. Although it is necessary to discharge to the exhaust, the exhaust is obstructed by the blocking film. Thus, as a means for exhausting the container main body, a large number of micropores may be provided in the closing film, and the microholes may be exhausted. However, it is expensive to provide micropores in the closing film.

  Therefore, as a means for exhausting the outside of the container body, it is preferable to partially provide a ventilation gap communicating with the outside of the container body between the closing film and the top surface portion of the container flange portion. The gas in the container can be exhausted from the gap for ventilation. Even if the liquid is about to leak from the gap for ventilation, the rib is guided into the container body by the above-described rib, so that the liquid leakage can be prevented. The lower limit of the gap is preferably higher than the bottom surface of the concave portion of the rib.

  As a specific exhaust means, a closing film may be provided by intermittently sticking in the circumferential direction. The non-sticking part formed by sticking intermittently becomes a ventilation gap communicating with the outside of the container body, from which the gas in the container body can be exhausted to the outside. There is no need to use the closing film as a special material, and the cost can be kept low. The width of the non-sticking portion is only required to be such that gas can pass through, and is preferably narrow.

  As another exhaust means, a shallow groove shallower than the above-described recess may be formed in each rib. The gas in the container body can be exhausted from the shallow groove. The shallow groove may have a depth and a width that allow gas to pass through, and is preferably shallower and narrower than the recess. Liquid leakage from the shallow groove can be prevented. The shallow grooves are preferably formed at different positions between the ribs. Since the shallow grooves are not arranged in the linear direction between the ribs, liquid leakage is less likely to occur.

  As is clear from the above description, the top surface portion of the lid is positioned above the top surface portion of the container flange portion at the time of external fitting, so that the lid can be fitted even when the closing film is adhered. Moreover, in the state which stuck the closure film, since the inner peripheral wall of a cover flange part and the inner peripheral wall of a container flange part closely_contact | adhere by pushing a cover further downward and setting it as internal fitting, it is set as a sealed state be able to. Therefore, liquid leakage and odor leakage can be prevented even if the blocking film is peeled off.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
1 is a perspective view of the packaging container of the first embodiment, FIG. 2 is an exploded perspective view of the packaging container of the first embodiment, FIG. 3 is a plan view of the container body of the first embodiment, and FIG. 1 is an AA cross-sectional view of FIG. 1, FIG. 5 is an enlarged view of the main part of FIG. 4, FIG. 6 is an enlarged view of the main part showing FIG. 8 is a cross-sectional view of the packaging container in FIG. 8, FIG. 8 is an enlarged view of the main part of FIG. 7, and FIG. 9 is a plan view showing a state in which a closing film is attached to the container body. FIG. 4 is a cross section taken along the line aa in FIG. FIG. 9 is a conceptual representation of the state of the sealing film being blown off. The sealed part (sticking part) is shown in black, and the part where the seal is blown off (non-sticking part) is outlined. Represents.

  As shown in FIGS. 1 and 2, the packaging container is made of a synthetic resin and includes a container body 1, a lid 2, and a closing film 3. As these specific materials, A-PET (amorphous polyethylene terephthalate) is used, but other synthetic resins such as polypropylene and polyethylene, paper, and other materials such as laminates thereof may be used.

  The container main body 1 is formed by vacuum / pressure forming of an A-PET sheet having a thickness of about 0.45 mm. The container body 1 is formed in a substantially rectangular shallow dish shape in plan view, and a convex container flange portion 4 is formed so as to protrude upward from the peripheral edge of the opening. More specifically, as shown in FIG. 5, the container flange portion 4 is configured in a U-shaped cross section from an inner peripheral wall 4 a, an outer peripheral wall 4 b, and a top surface portion 4 c that connects the apexes. Further, the lower end of the outer peripheral wall 4 b of the container flange portion 4 is bent outward to form a locking portion 5 that locks with the lid 2. Note that the shape of the container body in plan view is not limited to a substantially square shape, and various shapes such as a circle, a triangle, and a pentagon can be adopted.

  The top surface portion 4c of the container flange portion 4 has a structure in which two ribs are formed in the circumferential direction, and a groove 8 is formed between the outer rib 6 positioned on the outer peripheral side and the inner rib 7 positioned on the inner peripheral side. It has become. As shown in FIGS. 3, 7, and 8, the outer rib 6 is formed continuously, and the inner rib 7 is formed intermittently to have a plurality of recesses 9.

  The concave portions 9 of the inner rib 7 are partially provided, and the number and position thereof are not limited, but in the present embodiment, the concave portions 9 are provided near the center of each side and at the four corners. By providing at the four corners (corners) where the liquid tends to accumulate, the drainage of the groove 8 is improved, and liquid leakage can be prevented efficiently. Moreover, the knob 3a for peeling off the closing film 3 is often formed at the corner, and liquid can be prevented from splashing when opening from there. Moreover, as shown in FIG. 8, the recessed part 9 is formed so that it may incline and descend toward the inner side from the container main body outer side. The drainage property in the groove 8 can be improved.

  The groove 8 has a width (W) of about 1.5 mm and a depth (D) of about 0.5 to 2 mm, but is not limited thereto. The groove 8 is formed so as to be gradually inclined downward toward the recess 9. As shown in FIG. 3, in this embodiment, from the center position (groove depth D1 = 0.5 mm) of each piece of the container main body 1 toward the concave portions 9 (groove depth D2 = 1.0 mm) at the four corners. And gradually tilt down. In addition, it is good also as a structure which makes the intermediate position of the recessed part 9 and the recessed part 9 adjacent to this the highest position, and descends | falls gradually toward each recessed part 9 from there. As described above, by inclining the groove 8, drainage in the groove 8 can be improved.

  As shown in FIG. 4, the closing film 3 is adhered to the top surface portion 4 c of the container flange portion 4 by heat welding so as to cover the opening of the container body 1. The closure film 3 has a thickness of about 0.042 mm, and as shown in FIG. 9, the non-adhered portion that is intermittently heat-welded (so-called seal skipping) in the circumferential direction of the container flange portion 4 and is not heat-welded A gap X communicates between the inside and outside of the main body 1, and gas can be exhausted from the gap X to the outside of the container main body 1. A knob 3a for peeling off the closing film 3 is formed at one corner. In addition, although the thing with a narrow width | variety of the clearance gap X is preferable and is set to 0.5-1 mm in this embodiment, it is not limited to this. Further, the number and position thereof are not limited.

  The lid 2 is formed by vacuum / pressure forming of an A-PET sheet having a thickness of about 0.3 mm. The lid 2 is formed on the top surface portion 10 having a square shape in a plan view, the periphery of the top surface portion 10, the lid flange portion 11 that fits the container flange portion 4, and the outer periphery of the lid flange portion 11 depending downward. The skirt portion 12 is configured.

  As shown in FIGS. 5 and 6, the lid flange portion 11 is formed in a U-shaped cross section from an inner peripheral wall 11 a, an outer peripheral wall 11 b, and a top surface portion 11 c that connects the apexes similarly to the container flange portion 4. The container flange portion 4 is forcibly fitted with its flexibility to the inside, thereby being sealed as an inner fit. As shown in FIG. 10, the inner peripheral wall 11a of the lid flange portion 11 is provided with a protrusion 13 protruding outward, or as shown in FIG. 11, the outer peripheral wall 11b of the lid flange portion 11 is provided with an inner side. The fitting of the lid flange portion 11 and the container flange portion 4 may be strengthened by providing a second locked portion 14 that protrudes toward the locking portion 5 and locks to the locking portion 5.

  The skirt portion 12 extends from the outer peripheral wall 11 b of the lid flange portion 11 to a position below the top surface portion 10, and the engagement portion of the inner peripheral wall 4 a of the container body 1 is formed by the tip of the skirt portion 12 being recessed inward. A locked portion 15 that locks 5 is formed. As shown in FIG. 5, in the state where the closing film 3 is adhered, the top surface portion 10 of the lid 2 is regulated by the closing film 3, so that the lid flange portion 11 and the container flange portion 4 cannot be fitted. . Therefore, the lid 2 can be externally fitted to the container body 1 by engaging the upper end of the locked portion 15 of the lid flange portion 11 and the lower end of the locking portion 5 of the container flange portion 4.

  According to the above configuration, when the opening of the container body 1 is covered with the closing film 3 (FIG. 5), the locked portion 15 of the skirt portion 12 and the locking portion 5 of the container flange portion 4 are engaged. Thus, the lid 2 can be externally fitted (shallow fitting). When the closing film 3 is pasted (FIG. 6), the lid 2 is pushed further downward so that the container flange 4 is fitted to the lid flange 11 to make the inner flange, thereby making the lid flange 11 The inner peripheral wall 11a and the inner peripheral wall 4a of the container flange portion 4 can be brought into close contact with each other so as to be in a sealed state. Therefore, even if the closing film 3 is peeled off, liquid leakage and odor leakage can be prevented (deep fitting).

  Moreover, the inner rib 7 and the outer rib 6 are formed in the circumferential direction on the top surface portion 4c of the container flange portion 4, the outer rib 6 is formed continuously, and the inner rib 7 is formed intermittently. Therefore, even when the liquid in the container body 1 exceeds the upper side of the inner rib 7 when the closing film 3 is attached or when the lid 2 is fitted inside, the groove 8 between the ribs 8 In order to fall down, the groove 8 is forced to be guided into the container body 1 from the recess 9 of the inner rib 7. Since the outer rib 6 is formed continuously, liquid leakage to the outside can be prevented, so that it is difficult for liquid leakage from the container body 1.

  Furthermore, when fermented foods such as kimchi are accommodated, it is necessary to discharge the gas generated along with fermentation aging to the outside of the container body 1, and as an exhausting means, the closing film 3 is intermittently applied in the circumferential direction. The gas in the container main body 1 can be exhausted to the outside through the gap X. It is not necessary to use the closing film 3 as a special material, and the cost can be kept low. Even if the liquid is about to leak out from the ventilation gap X, the liquid is prevented from leaking because it is guided into the container body 1 by the action of the inner rib 7 and the outer rib 6 described above.

<Second Embodiment>
12 is an exploded perspective view of the packaging container according to the second embodiment, FIG. 13 is a plan view of the container body of the packaging container according to the second embodiment, and FIG. 14 is a packaging container at the cc portion of FIG. FIG. 15 is an enlarged view of a main part of FIG.

  As shown in FIGS. 12 to 15, in this embodiment, as an exhaust means to the outside of the container, instead of sticking by the seal blow in the first embodiment, the shallow groove 16 is formed in the inner rib 7 and the outer rib 6. The other basic configuration is the same as that of the first embodiment.

  Therefore, since each basic configuration is the same as that of the first embodiment, a description thereof will be omitted, and the shallow groove 16 unique to this embodiment will be briefly described.

  The shallow groove 16 is set to be shallower and narrower than the recess 9. Although not limited to this, specifically, the shallow groove 16 has a width of 0.5 mm and a depth of 0.3 mm. Since the shallow groove 16 serves as a ventilation gap that communicates with the outside of the container body 1 between the closing film 3 and the top surface part 4c of the container flange part 4, the gas in the container body 1 can be exhausted. . Since the shallow groove 16 is shallower and narrower than the recess 9 of the inner rib 7, it is difficult for liquid leakage from the shallow groove 16.

  As shown in FIGS. 12 and 13, the shallow grooves 16 are formed at different positions between the ribs. Thus, since it does not form continuously in the same position, the liquid leakage from the shallow groove | channel 16 can be prevented more effectively.

The perspective view of the packaging container of 1st Embodiment Exploded perspective view of the packaging container of the first embodiment The top view of the container main body of the packaging container of 1st Embodiment AA sectional view of FIG. 4 is an enlarged view of the main part of FIG. The principal part enlarged view which shows the state which made FIG. 5 the inner fitting Sectional drawing of the container for packaging in the bb site | part of FIG. 7 is an enlarged view of the main part of FIG. The top view which shows the state which stuck the closure film on the container main body The principal part expanded sectional view of the packaging container which shows the inner fitting state of other embodiment The principal part expanded sectional view of the packaging container which shows the inner fitting state of other embodiment Exploded perspective view of the packaging container of the second embodiment The top view of the container main body of the packaging container of 2nd Embodiment Sectional drawing of the container for packaging in the cc site | part of FIG. Main part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container body 2 Lid 3 Closure film 4 Container flange part 4a Inner peripheral wall 4b Outer peripheral wall 4c Top surface part 5 Locking part 6 Outer rib 7 Inner rib 8 Groove 9 Recess 10 Top surface part 11 Lid flange part 11a Inner peripheral wall 11b Outer peripheral wall 11c Top Surface 12 Skirt 15 Locked 16 Shallow groove X Clearance

Claims (8)

A container body having a container flange portion protruding upward at the periphery of the opening;
A lid flange portion that fits with the container flange portion is formed on the periphery of the top surface portion, and is configured with a lid having a skirt portion that hangs downward from the outer periphery of the lid flange portion,
The inner flange where the lid flange portion is fitted to the container flange portion, and the top surface portion of the lid is positioned below the top surface portion of the container flange portion, and
The locking portion formed on the outer peripheral wall of the container flange portion and the locked portion formed at the lower portion of the skirt portion are engaged, and the top surface portion of the lid is more than the top surface portion of the container flange portion. A packaging container characterized by being capable of two-stage fitting with an outer fitting at an upper position. A closing film is attached to the top surface portion of the container flange portion so as to cover the opening of the container body, and the lid can be externally fitted in a state where the closing film is attached. The packaging container according to claim 1. At least two ribs are formed in the circumferential direction on the top surface portion of the container flange portion, the outermost rib is formed continuously, and the other ribs are formed intermittently to have a plurality of recesses. The packaging container according to claim 2. The packaging container according to claim 3, wherein the recess is provided at a corner of the container body. The packaging container according to claim 4, wherein the groove is gradually inclined downward toward the recess. The packaging container according to any one of claims 2 to 5, wherein the closing film is intermittently stuck in the circumferential direction as a means for exhausting the container main body. The packaging container according to any one of claims 2 to 5, wherein a shallow groove shallower than the recess is formed in each of the ribs as a means for exhausting the container main body. The packaging container according to claim 7, wherein the shallow grooves are formed at different positions between the ribs.

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