JP5653027B2 - Packaging container and manufacturing method thereof - Google Patents

Description

  The present invention relates to a packaging container and a method for manufacturing the same, and in particular, a packaging container having a configuration in which a container main body and a lid body are fitted with an internal fitting structure so that the juice of stored items is hardly leaked. The present invention relates to a packaging container capable of preventing unauthorized tampering of contents by a function of clarifying an opening mark of the container, and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, as containers for storing foods such as prepared dishes, cut vegetables and fruits, packaging containers in which a lid is fitted inside an opening of a container body to improve sealing performance have been used. In a container having such an internal fitting structure, it is possible to ensure sufficient sealing performance against the contents by simply closing the cover, but normally, when displaying at a store, after closing the cover, The outer periphery is wrapped with a wrap or a film, and a sticker is attached or taped.

  One of the reasons is that if the packaging containers are displayed as they are on the storefront, they may be tampered with and the contents may be tampered with during the display. It is possible to prevent such mischief and tampering. In order to prevent tampering etc., currently the main countermeasures are as described above, for example, sticking a seal that breaks when the seal is opened at the boundary between the container body and the lid Or a means such as sticking a sticker that can be easily repaired and that cannot be repaired.

  However, after preparing such a seal and filling the container with the contents, in order to apply it to the joint between the container body and the lid, it is necessary to provide a large facility separately or rely on manual work. . Even if equipment for sticking a sticker is introduced, there is no device that can handle all food packaging containers of different sizes and shapes with a single device. The current situation is that you have to rely on work.

An example of a packaging container provided with tampering prevention means for solving such a problem is described in Patent Document 1. There, in a packaging container composed of a container body and a lid body manufactured by thermoforming a synthetic resin sheet, a fixing portion for fixing the container body and the lid body to each other is provided at the peripheral edge of the packaging container, An easy-cut line for opening the lid is provided on the lid inside the container with respect to the fixing portion. Specifically, two lids are provided on the lid inside the container as the easy-cutting line, and the peeling part sandwiched between the two easy-cutting lines is torn off along the easy-cutting line. The body can be opened.
[Prior art documents]
[Patent Literature]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2007-55656

  It can be expected that the packaging container described in Patent Document 1 can prevent the lid from being opened by mischief. However, it is necessary to provide a fixing part for fixing the container main body and the lid to each other at the peripheral part of the container, and the container receiving part has to be reduced by that much, resulting in a disadvantage that the storage efficiency is reduced. . In addition, even when the peeling part is torn off, it is normal that the peripheral part of the container body and the peripheral part of the lid body are in close contact with each other when the lid is closed again. Then, it may happen that it is not easy to visually recognize whether or not the lid has been opened once. This also makes it difficult to open the lid when the lid is closed again.

  Furthermore, the fixing part that fixes the container body and the lid to each other cannot be used to perform the fixing function between the container body and the lid when the lid is re-closed after the lid has been opened. Even if leftover food remains, it cannot be closed again in a sealed state.

  The present invention has been made in view of the circumstances as described above, it is clear that the lid opening is clear and can prevent unauthorized tampering more reliably, and even when the stored food etc. remains, It is a first object to disclose a more improved packaging container that can be easily reclosed in a sealed state. Moreover, it is set as the 2nd subject to disclose the manufacturing method for manufacturing the container for packaging.

A packaging container according to the present invention is a packaging container having an inner fitting structure portion in which a container body and a lid are fitted by an inner fitting structure, and the inner fitting structure portion on the container body side is A first flange portion extending on the outer periphery of the surrounding wall and a first wall having a shape gradually reduced in diameter toward the upper side of the container, and a second wall extending outward in the horizontal direction on the upper end side of the first wall. A flange portion is provided, and the inner fitting structure portion on the lid side rises from the horizontal portion that contacts the first flange portion of the container body when the lid is closed, and on the inner surface side of the first wall of the container body. A horizontal flange that constitutes a peripheral edge of the lid body extends from an end of the outer wall opposite to the horizontal portion, and an outer edge of the horizontal flange. The lid is provided with a lid-side knob that extends outward. The lunge is an area excluding an area where the lid side knob part is located on the second flange part of the container body and is placed on the second flange part of the container body, In the state where the peripheral edge of the horizontal flange of the lid is close, a rising wall is formed, and the container side that extends outward to a region where the rising wall of the second flange portion is not formed A knob part is provided, and the lid side knob part and the container side knob part are integrally formed through a connecting part, and the connecting part is provided with a breaking part for dividing the connecting part. It is characterized by that.

  In the packaging container described above, the container body and the lid body are fitted by an internal fitting structure, and the desired content is sealed against the contents by closing the lid after putting the desired contents in the container body. Sex is secured. When the lid is closed, the lid side knob and the container side knob are in a state of being connected via the connecting portion, and it is difficult to open the lid as it is, and an undesired opening is performed due to mischief, etc. Can be effectively avoided.

  When the purchaser consciously opens the lid, the lid-side knob and the container-side knob can be easily discontinuous by breaking the breaking portion for dividing the connecting portion. The purchaser or the like can easily open the lid by picking the lid side knob and the container side knob. Even after the lid is opened once, the lid can be closed again while maintaining the sealing structure. Moreover, when the connecting portion has been divided due to mischief or the like, the fact that the lid side knob and the container side knob are separated makes it possible to visually recognize the fact of the mischief.

  Furthermore, in the packaging container according to the present invention, it extends only to the inner fitting structure portion necessary for sealing, and includes only a lid side knob portion and a container side knob portion on the outside thereof, and a connecting portion connecting them. With the provision of the function of preventing unauthorized opening, accommodation efficiency is not reduced.

  In a preferred embodiment of the packaging container according to the present invention, the packaging container is further provided with a second knob for facilitating the dividing operation at the breaking portion at the connecting portion. In addition to the function of facilitating the dividing operation, the second knob can also have a function of easily recognizing that the lid has already been opened due to mischief.

The packaging container according to the present invention is provided on the outside of the inner fitting structure portion of the container body, except for the region where the lid side knob is located when the lid is closed, and the lid body when the lid is closed. Has a rising wall at a position close to the peripheral edge. Due to the presence of the rising wall, it is extremely difficult to pick up the peripheral edge of the lid with a human fingertip or the like. Therefore, it is possible to more reliably prevent the lid from being illegally opened.

  In the packaging container according to the present invention, the breaking portion formed in the connecting portion may be arbitrary as long as it can be easily divided. As an example, a configuration in which connection portions and cut portions are alternately arranged, such as perforations, can be mentioned. Further, the breaking means may be constituted by one or two or more linear portions having a configuration in which connecting portions and cut portions are alternately arranged.

  The packaging container according to the present invention can be made of any material in consideration of the purpose of use and the like. A packaging container obtained by thermoforming a synthetic resin sheet is particularly preferable from the viewpoint of ease of molding. When containing foodstuffs, the synthetic resin sheet is preferably a non-foamed sheet, and may be a foamed synthetic resin sheet.

  The present invention provides, as a method for producing the packaging container, one molded product in which the container body, the container side knob, the connecting portion, the lid side knob, and the lid are integrated with the base sheet. Alternatively, a packaging container comprising at least a step of thermoforming a plurality of pieces, a step of processing the fractured portion in the connecting portion, and a step of punching the molded product from the molded base sheet. A manufacturing method is also disclosed. In this case, a step of punching the molded product may be performed after the step of processing the fracture portion, and a step of processing the fracture portion and a step of punching the molded product may be performed simultaneously. In the case of the latter, there exists an advantage which can process in the state without a position shift of the position of a fracture | rupture part. Moreover, as a shaping | molding method at the time of thermoforming, the conventionally well-known arbitrary vacuum forming method, pressure forming method, or the vacuum pressure forming method combining these can be illustrated.

  According to the present invention, it is possible to more reliably prevent the tampering of the contents with clear opening marks, and easily reclose in a sealed state even when the stored food remains. A packaging container adapted to be able to be obtained is obtained.

The figure (FIG. 1 (a)) shown in the state which opened one form of the packaging container by this invention, and the figure which shows the other structure of the fracture | rupture part (FIG.1 (b)). The figure (FIG. 2 (a)) which shows the state which closed the packaging container shown in FIG. 1 (a), and the expanded sectional view which followed the bb line of FIG. 2 (a). The figure which shows the state which fractured | ruptured the fracture | rupture part in the packaging container shown to Fig.2 (a). The figure which shows the other form of the packaging container by this invention in the open state (FIG. 4 (a)), and the figure which shows the state which the packaging container closed (FIG.4 (b)). The figure which shows the other form of the packaging container by this invention in the open state (FIG.5 (a)), and the figure which shows the state which closed the packaging container (FIG.5 (b)). The figure which shows the other form of the packaging container by this invention in the open state.

Hereinafter, the present invention will be described based on embodiments.
[First Embodiment]
1 to 3 show a first embodiment of a packaging container according to the present invention. This packaging container A1 is obtained by thermoforming a stretched polystyrene sheet having a thickness of about 0.1 to 1.0 mm, which is a base sheet, by a conventionally known vacuum forming method using an appropriate forming die. As a basic configuration, the container main body 10 and the lid body 20 both having a circular shape in plan view are provided, and both are integrally continuous via the connecting portion 30. Although not shown, a large number of packaging containers A1 are thermoformed on the base sheet, and each packaging container A1 is punched from the molded sheet. The substrate sheet is not limited to the above-described one, and a sheet such as polyethylene, polypropylene, polystyrene, and PET (polyethylene terephthalate), a stretched sheet, and the like can be used.

  The container body 10 includes a bottom surface 11 and a peripheral wall 12 having an appropriate height, and an upper end side of the peripheral wall 12 is an annular first flange portion 13 extending outward in the horizontal direction. From the outer edge of the first flange portion 13, a first wall 14 rises slightly inwardly (that is, the diameter gradually decreases toward the top of the container), and the upper end side of the first wall 14 is horizontal. It is an annular second flange portion 15 extending outward in the direction.

  An outer edge side of the second flange portion 15 is a downward wall 16, and a lower end portion of the downward wall 16 is an outward bent portion 16 a. And the container side knob | pick part 17 is formed so that it may extend in the horizontal direction outer side from the one part area | region of this bending part 16a.

  Further, an annular ridge 19 having a rising wall 18 rising in the vertical direction is formed on the upper surface region of the second flange portion 15, and the ridge 19 is formed by the container side knob 17. A portion corresponding to the located region is cut out, and a region 19 a without the ridge 19 is formed.

  The lid 20 includes a top surface 21 and a peripheral wall 22 having an appropriate height. An end portion of the peripheral wall 22 opposite to the top surface 21 is an annular flange portion 23 extending outward in the horizontal direction, and an annular lid-side ridge 24 is formed outside the flange portion 23. Is formed. The lid-side ridge 24 has a horizontal portion 25 and an outer wall portion 26, and the outer wall portion 26 has a shape that slightly bulges outward (a shape that includes a portion that decreases in diameter toward the upper side of the container when the lid is closed). ). Further, a horizontal flange 27 constituting a peripheral portion of the lid extends in the horizontal direction from the end of the outer wall portion 26 opposite to the horizontal portion 25.

  As shown in FIG. 2 (b), the lid-side ridge 24 is in a state in which the container body 10 is covered with the lid body 20 (with a lid), and the lower surface side of the horizontal portion 25 is the first of the container body 10. A part or all of the portion that is in close contact with the upper surface side of the flange portion 13 and bulges outside the outer wall portion 26 is in pressure contact with the inner surface of the first wall 14 of the container body 10, and the horizontal flange 27 is Their positions and shapes are set so that they can be in close contact with the two flange portions 15. In addition, the shape of the said cover-side protruding item | line 24 is made into circular arc shape, and it can press-contact more closely by making the 1st flange 13 and the 1st wall 14 of the container main body corresponding at the time of a lid | cover substantially the same shape. . Further, the horizontal flange 27 extends in the horizontal direction such that when the lid is closed, the outer peripheral edge thereof is very close to the rising wall 18 constituting the annular ridge 19 of the container body 10. ing. The rising wall 18 is not limited to a shape that rises vertically as shown in the figure, but may have a shape that gradually decreases in diameter toward the upper side of the container.

  As described above, the rising wall of the lid body 20 (in this example, the outer wall portion 26 of the lid-side ridge 24) is pressed against the inner surface of the rising wall of the container body 10 (in this example, the first wall 14). In the present invention, a configuration including at least a structure that forms a sealed state is referred to as “a form in which the container body and the lid body are fitted by the inner fitting structure”. Therefore, said packaging container A1 comprises the packaging container of the form which a container main body and a cover body fit by an internal fitting structure.

  As shown in FIG. 1A, the lid 20 has a lid side knob 28 that extends from the horizontal flange 27 in a substantially horizontal direction at a position facing the container side knob 17 of the container body 10. ing. And the container side knob | pick part 17 and the lid side knob | pick part 28 are integrally shape | molded via the above-mentioned connection part 30. FIG. As shown in FIG. 2A, the length of the lid-side knob 28 is such that the tip of the lid-side knob 28 substantially coincides with the tip of the container-side knob 17 formed on the container body 10 in the state of being covered. Is preferred. In the illustrated example, the lateral width of the lid side knob 28 is the same as the lateral width of the container side knob 17. However, on the condition that it can enter the region 19a without the ridges 19 of the container body described above, The width may be different.

  As shown in the figure, in this example, the connecting portion 30 is formed with a breaking portion including two breaking lines 31 and 31 that run in parallel with a predetermined width, and the breaking line 31 is formed as a perforation. The connection portions and the cut portions are alternately arranged. The breaking line 31 is not limited to the perforation, and may be a shape in which the cut-in cut portions 31a and the connection portions are alternately arranged as shown in FIG. Further, the connecting portion 30 extends the region sandwiched between the two break lines 31 and 31 beyond the lateral width of the lid side knob portion 28 and the container side knob portion 17 in the lateral direction. The extension region constitutes the second knobs 32 and 32. Moreover, the both ends of the said breaking line 31 are made into a notch part, and division | segmentation becomes easy. Furthermore, by performing R processing (chamfering processing) on both sides of the lid side knob portion 28 and the container side knob portion 17 on the side in contact with the break line 31 as shown in the figure, the fingertip is used when the lid is opened after dividing. Can be protected.

  In this example, the vertical width of the connecting portion 30, that is, the width between the two break lines 31, 31 is the width of the downward wall 16 formed on the outer edge side of the second flange portion 15 in the container body 10. It is preferable that the width is substantially equal to the width in the vertical direction, so that stability when the lid is closed can be secured, and inadvertent division can be prevented.

  Formation of the break line 31 at the break portion is performed by providing a cutting blade intermittently at a required portion of the molding die, and forming the break line 31 at a predetermined portion of the base sheet at the time of clamping when thermoforming. It may be inserted at the same time, or when a molded product after thermoforming is punched, an intermittent cutting blade is provided on the punching machine side, and the breaking line 31 is formed simultaneously with the step of punching the molded product. Also good. In the case of the latter, there exists an advantage which can process in the state without a position shift of the position of a fracture | rupture part (break line 31).

  In use, after putting appropriate contents such as food in the container body 10 in the opened state shown in FIG. 1, the lid 20 is inverted with the connecting portion 30 as a hinge portion and closed. The state is shown in FIGS. 2 (a) and 2 (b). Since the lid side knob 28 formed on the lid 20 can enter the region 19a of the container body 10 where the ridges 19 are not present, as shown in FIG. 2B, the container body 10 and the lid 20 Is a closed fitting state by the above-described inner fitting structure, and the sealing performance of the contents is ensured. Further, the horizontal flange 27 positioned outside the inner fitting structure portion of the lid 20 is in close contact with the second flange portion 15 of the container body 10, and the outer peripheral edge thereof is an annular shape of the container body 10. Therefore, the lid 10 can be prevented from being forcibly opened from the tip of the horizontal flange 27. As described above, when the rising wall 18 is gradually reduced in diameter toward the upper side of the container, the lid 10 can be more reliably prevented from being opened from the tip of the horizontal flange 27.

  In order to open the packaging container 10 after packaging, the second knobs 32, 32 provided in the connecting part 30 are picked with fingers, and the connecting part 30 is connected to the lid-side knob 28 using the breaking line 31. Separate from the container side knob 17. This state is shown in FIG. In the state where the connecting part 30 is cut off, as shown in the figure, the lid side knob part 28 and the container side knob part 17 are in a posture that can be easily picked by a fingertip, and the user can easily open the lid. Can do. Moreover, since both ends are R-processed (both ends are chamfered), the fingertips are also protected. If the lid opening operation is performed due to mischief or the like, the connecting portion 30 is cut off and the lid side knob portion 28 and the container side knob portion 17 are exposed as they are. It can be easily visually recognized.

  Moreover, in said packaging container A1, besides the said internal fitting structure part required for sealing, it only has the cover side knob | pick part 28, the container side knob | pick part 17, and the connection part 30 which connects them on the outer side. In addition, the housing efficiency as a packaging container is not reduced.

  Although not essential, in the illustrated example, the container body 10 and the lid 20 have a horizontally extending region, that is, the container body 10 has an outer side formed at the lower end of the downward wall 16. In the bent portion 16a and the container side knob 17 and the lid 20, the horizontal flange 27 and the lid side knob 28, and the second knobs 32 and 32 are further processed with fine irregularities by thermoforming. The outer edge line of these portions is not a straight line but a waveform (sine wave, triangular wave, trapezoidal wave, etc.) in side view. Thereby, since the sharpness of the edge in those portions is eliminated, the fingertip can be protected when the lid 20 is opened and closed, and further, when the connecting portion 30 is removed. Moreover, the area | region currently extended in the horizontal direction of the container main body 10 and the cover body 20, ie, the intensity | strength of an outer periphery, can also prevent the container main body 10 and the cover body 20 from breaking carelessly.

[Second Embodiment]
FIG. 4 shows a second embodiment of a packaging container according to the present invention. This packaging container A2 is the same as the packaging container A1 described above except for the configuration of the connecting portion 30, and the same members are denoted by the same reference numerals and description thereof is omitted.

  In the packaging container A2, as shown in FIG. 4A, the container side connecting portion 30a is integrally formed with the tip of the container side knob 17, and the lid side connecting portion 30b is integrally formed with the tip of the lid side knob 28. Both are connected by the one broken line 31, and the connection part 30 is comprised by it. Further, second knobs 32a and 32b having different sizes are formed on both sides of the container side connecting part 30a and the lid side connecting part 30b, respectively. And the protrusion 35 is formed in the 2nd knob | pick parts 32a and 32b. In the illustrated one, it is formed only on the second knob portion 32a side, but may be formed on the second knob portion 32b side. Moreover, not a protrusion but a protrusion may be sufficient.

  As shown in FIG. 4B, the lid body 20 is closed with the lid side knob portion on the container side knob portion 17 and the container side connecting portion 30a in the state where the lid is closed. 28 and the lid-side connecting portion 30b overlap each other, and the break line 31 is located at the tip thereof. The user can easily open the lid by pinching the second knobs 32a and 32b. The unauthorized opening prevention function is the same as that of the packaging container A1. Further, due to the presence of the protrusion 35, the second knobs 32a and 32b are slightly separated from each other, and are easily picked. In this case as well, both ends of the break line 31 are set as cut portions, and both the even-side portions of the lid side knob portion 28 and the container side knob portion 17 on the side in contact with the break line 31 are R-processed (chamfered). It is desirable to keep it.

[Third Embodiment]
FIG. 5 shows a third embodiment of a packaging container according to the present invention. The packaging container A3 is formed in the form of the second knob 32, and the projection 35 is formed not in the second knob 32 but in the region of the container side connecting part 30a and the lid side connecting part 30b. This is different from the packaging container A2 described above. Other configurations are the same as those of the packaging container A2. The same members are denoted by the same reference numerals, and description thereof is omitted.

  In the packaging container A3, as shown in FIG. 5 (a), the second knobs 32a and 32b are provided on both sides in one broken line 31 connecting the container side connecting part 30a and the lid side connecting part 30b. Is formed. That is, the break line 31 is composed of easily breakable line portions 31a and 31a on both sides and a central cut line portion 33, and the cut line portion 33 is bent in a U-shape in opposite directions to each other. Two second knobs 32a and 32b are formed.

  As shown in FIG. 5 (b), the lid 20 is closed on the container side knob 17 and the container side connecting part 30a in the state where the lid is closed. 28 and the lid-side connecting portion 30b overlap each other. And it becomes the attitude | position in which the breaking line 31 and the above-mentioned 2nd knob | pick parts 32a and 32b were located in the front-end | tip part. Even in this configuration, the user can easily open the lid by pinching the second knobs 32a and 32b. The unauthorized opening prevention function is the same as that of the packaging container A1. Further, by providing the protrusion 35, a slight gap can be provided between the container side connecting portion 30a and the lid side knob 28, and the operation of opening the lid 20 is facilitated. Also in this case, it is desirable that the portion where the easily breakable line portions 31a and 31a are connected to the cutting line portion 33 is a cut portion and that the R is chamfered.

[Fourth Embodiment]
FIG. 6 shows a fourth embodiment of a packaging container according to the present invention. This packaging container A4 is different from the packaging container A1 having a circular shape in plan view described above only in that the overall shape is rectangular in plan view. Therefore, in FIG. 6, the member which fulfill | performs the same function as the member in packaging container A1 shown in FIGS. 1-3 is attached | subjected with the same code | symbol, and description is abbreviate | omitted. However, the term “annular” in the description of the packaging container A1 is read as “rectangular” in the packaging container A4.

  Even if it is packaging container A4 of this form, it does not require description that the unauthorized opening prevention function is the same as that of packaging container A1. Further, although not shown, it is natural that the structure of the connecting portion shown in the second and third embodiments can be used for the packaging container A4 of this form.

A1 to A4 ... packaging containers,
10: Container body,
12 ... the surrounding wall of the container body,
13 ... 1st flange part,
14: The first wall with a slightly inclined posture,
15 ... 2nd flange part,
16 ... downward wall,
17 ... container side knob,
18 ... rise wall,
19 ...
19a ... A region without the ridges 19,
20 ... the lid,
22 ... the surrounding wall of the lid,
23 ... Flange part,
24 ... the lid-side ridge,
25 ... the horizontal part of the ridge on the lid side,
26 ... the outer wall of the cover-side ridge,
27 ... Horizontal flange,
28 ... lid side knob,
30 ... articulated part,
31 ... Break line (break part),
32 ... The second knob.

Claims (5)

A packaging container having an inner fitting structure part in which a container body and a lid are fitted by an inner fitting structure,
The inner fitting structure portion on the container body side is constituted by a first flange portion extending on the outer periphery of the peripheral wall and a first wall having a shape gradually reduced in diameter toward the upper portion of the container, and is formed on the upper end side of the first wall. Is provided with a second flange portion extending outward in the horizontal direction,
The inner fitting structure portion on the lid side includes a horizontal portion that comes into contact with the first flange portion of the container body when the lid is closed, and an outer wall portion that rises from the horizontal portion and comes into pressure contact with the inner surface side of the first wall of the container body. A horizontal flange that forms a peripheral edge of the lid extends from the end of the outer wall opposite to the horizontal portion, and extends to the outside at a part of the outer edge of the horizontal flange. A lid side knob is provided,
When the lid is closed, the horizontal flange of the lid is placed on the second flange portion of the container body, and an area in which the lid side knob in the second flange portion of the container body is located is located. A rising wall is formed at a position where the peripheral edge of the horizontal flange of the lid body is close in the excluded region, and the rising wall of the second flange portion is not formed. A container side knob extending outward is provided in the region;
The lid side knob and the container side knob are integrally formed through a connecting part,
The connecting portion is provided with a breaking portion for dividing the connecting portion.
A packaging container characterized by that.   The packaging container according to claim 1, wherein the connecting portion is further provided with a second knob for facilitating a dividing operation at the breaking portion. . 3. The packaging container according to claim 1 , wherein the fracture portion includes a configuration in which connection portions and cut portions are alternately arranged. 4. The packaging container according to claim 3 , wherein the fracture portion includes two linear portions having a configuration in which connection portions and cut portions are alternately arranged. A method for producing a packaging container according to any one of claims 1 to 4 ,
Thermoforming one or a plurality of molded products in which the container body, the container side knob, the connecting portion, the lid side knob and the lid are integrated with the base sheet;
A step of processing the fracture portion in the connecting portion;
A step of punching out the molded product from the molded base sheet,
And a manufacturing method of a packaging container characterized by comprising:

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