JP6230185B2 - Inner mating packaging container with tamper-proof structure and its lid - Google Patents

Description

  The present invention relates to an internal fitting packaging container of a type in which a lid body is internally fitted to a container main body, and has a structure for preventing unauthorized tampering.

  In a packaging container composed of a container body and a lid formed of a synthetic resin sheet, the lid is fitted inside the container body when the container is covered with the lid to close the opening of the container body. Some have an internal fitting structure in which the closed state is maintained by joining. The thing provided with this inner fitting structure has the advantage that it is easy to reseal even after the lid is opened.

  As for the packaging container having such an internal fitting structure, the following Patent Document 1 has been proposed. The packaging container described in the following Patent Document 1 has a plurality of engaging protrusions protruding inwardly on the inner surface of the opening edge of the container body at intervals in the circumferential direction, and the lid is locked by the engaging protrusions. This is the configuration. However, the lid is configured to be locked by a plurality of engaging protrusions, and the outer surface of the lid and the inner surface of the container main body are not in close contact with each other, so that the sealing and sealing properties are poor. There's a problem.

  Moreover, this packaging container aims at easy opening of a cover body in an internal fitting type. For this reason, a structure is adopted in which a tab horizontally extending outwardly on the outer edge of the lid flange portion of the lid body rises along the inner surface of the container body when the lid body is fitted to the container body. In this way, when the knob piece rises upward, the knob piece can be easily picked and the lid can be easily opened.

  However, in such a packaging container, since the tab is raised upward and can be easily picked and opened, for example, when the packaging container is arranged in a store or the like and displayed on the display, the lid body is intentionally removed from the container body. It is difficult to discover that such unauthorized tampering has occurred if the contents are easily tampered with and the contents are tampered with and then closed again. Moreover, even if it is not intentional, since the knob piece stands up and stands out, there is a possibility that, for example, the knob piece is picked in an interest and the lid body is inadvertently removed.

  Therefore, it is provided with an internal fitting structure excellent in hermetic sealability, and once opened, the trace remains clearly in the packaging container so that it can be easily found. The present applicant has already proposed a packaging container having a tamper-proof structure (Patent Document 2 below).

  In this packaging container, a body-fitting wall portion having a reverse taper shape as a whole is provided around the opening edge of the container body toward the upper side, and the inner surface of the packaging container is a seal surface (fitting surface) over the entire circumference. The cover body is also provided with a reverse-fitting-shaped lid fitting wall portion that faces the outside toward the lower side correspondingly, and the outer surface is configured as a sealing surface over the entire circumference. Yes. Then, when closing the lid, when the lid is pressed downward toward the opening of the container body, the lid fitting wall enters the inside of the body fitting wall of the container body, and the lid fitting wall The outer surface of the container is in close contact with the inner surface of the body fitting wall portion while pressing the inner surface of the body fitting wall portion to the outside, thereby sealing the opening of the container body. Therefore, an excellent hermetic sealability can be obtained. Moreover, since the opening part of a container main body can be sealed again by resealing, even when the accommodated food etc. remain, it can be resealed repeatedly in the state with high sealing performance.

  Further, the container body and the lid body are integrated with each other via a connecting portion, and the connecting portion is provided with an easily breaking portion for dividing the connecting portion, and the easily breaking portion when opening the lid. The container body and the lid body are made discontinuous by breaking, and the lid body is removed from the container body. Therefore, if the easily broken portion is broken by mischief, the fact that the easily broken portion is broken by the broken break can be easily found on the visual level.

  As described above, the packaging container already proposed by the present applicant is excellent in hermetic sealing and can effectively prevent unauthorized tampering. In order to do so, the container body and the lid body are integrally thermoformed through the connecting portion, and then the easily breakable portion is processed in the connecting portion, and then the container body and the lid body in the connected state are formed. It is difficult to punch the sheet from the sheet in a batch, and it is difficult to punch the container body and the lid from the sheet all together without shifting. Special manufacturing equipment was required.

  Furthermore, since an easily breakable portion is provided at the connecting portion that connects the container body and the lid, the easily breakable portion is easily broken when an external force is applied to the container body and the lid. Care must be taken not to break the easily breakable part at times.

JP 2008-24338 A JP 2011-102128 A

  Therefore, the present invention has been made in view of the above-mentioned conventional problems, has an excellent hermetic sealability, can effectively prevent tampering, and has an internal fitting with a tamper-proof structure that is easy to manufacture and handle. It is an object to provide a packaging container and its lid.

The present invention has been made to solve the above-mentioned problem, and the inner fitting packaging container with a tamper-proof structure according to the present invention is a container body thermoformed from a synthetic resin sheet separately from each other, and A container for inner fitting and wrapping, in which the lid is internally fitted to the container body, and the container body has a reverse-tapered body fitting wall portion whose inner circumference is a sealing surface; A main body flange portion formed on the outer side of the main body fitting wall portion, and the lid body has an inverted taper-shaped lid fitting wall portion whose outer periphery is a sealing surface, and an outer side of the lid fitting wall portion A guard wall portion that rises upward to guard the outer edge of the lid flange portion from the outside so that the lid flange portion cannot be picked up on the main body flange portion of the container body. There is formed over the entire periphery, the upper part of the guard wall lower portion of the guard wall Is also formed in a small diameter, the lid flange is extended unsealing knob piece, the opening for the tab is by fixing means reconsolidation not folded inward at the upper surface valley fold at a predetermined position of the lid The folding part of the opening tab is fitted to the lower part of the guard wall of the container body .

  In the inner-fitting wrapping container having this configuration, the container main body and the lid body are configured separately, so that manufacture and handling are easy. In addition, the container body is provided with a reverse-tapered body fitting wall portion whose inner periphery is a sealing surface, and the lid body is provided with an inverted-tapered lid fitting wall portion whose outer surface is a sealing surface. Since the joint structure is adopted, the outer surface of the lid fitting wall portion is in close contact with the inner surface of the main body fitting wall portion over the entire circumference, and the opening of the container main body is sealed. In addition, a guard wall portion that rises upward is formed over the entire circumference of the main body flange portion of the container body, and the outer edge of the lid flange portion is guarded from the outside by the guard wall portion. Even if you try to pick it up, it is guarded by the guard wall and you can't pick it up. Furthermore, an opening knob is extended on the lid flange. That is, the lid has a structure that can be opened only from a specific portion of the opening tab, not a structure that can be opened from an arbitrary position on the outer edge of the lid flange portion. Therefore, in order to remove the lid from the container body and open the packaging container, it is only possible to pick the opening tab and pull the lid upward, but the opening tab is folded back to the lid. Since it is fixed at a predetermined position by a fixing means that cannot be re-fixed, if the fixing of the opening tab is released to try to open it by mischief, the opening tab is fixed to the lid again. It is not possible to leave a clear opening mark. Therefore, the fact that it has been opened can be easily found by visual inspection.

  In particular, the lid is preferably formed with a steam discharge part for discharging steam to the outside during heating by the microwave oven, and the steam discharge part is covered with an opening knob. In such a configuration, since the steam discharge part is covered with the opening tab, in the unopened state, communication between the inside and the outside through the steam discharge part is prevented, and high sealing performance is obtained. . And the steam discharge part can be exposed by releasing the fixation of the opening tab, and the steam inside the packaging container is discharged to the outside during heating by the microwave to prevent an excessive increase in internal pressure Can do.

  Furthermore, it is preferable that the fixing of the opening tab is released by heating. According to this configuration, the fixing of the opening tab is automatically released during heating by the microwave oven, and the vapor discharge portion is exposed, so that the trouble of releasing the fixing of the opening tab before heating by the microwave oven is eliminated. The packaging container in an unopened state can be heated as it is in a microwave oven.

  Moreover, it is preferable that the fixing means that cannot be re-fixed is an adhesive tape that cannot be re-attached, and the opening tab can be easily fixed to the lid with a simple configuration.

Further, the lid body of the inner fitting packaging container with the tamper-proof structure according to the present invention is thermoformed from the synthetic resin sheet separately from the container body thermoformed from the synthetic resin sheet to the container body. A lid of an internally fitted packaging container to be internally fitted, wherein the container main body has an inverted tapered main body fitting wall portion whose entire inner surface is a sealing surface, and an outer side of the main body fitting wall portion. The lid includes a formed body flange portion, and the lid body is formed on the outside of the lid fitting wall portion with an inverted tapered lid fitting wall portion whose entire outer surface is a sealing surface. A guard wall portion that rises upward to guard the outer edge of the lid flange portion from the outside so that the lid flange portion cannot be picked up when the lid is closed. small but are formed over the entire periphery, the upper part of the guard wall portion than the lower portion of the guard wall Are formed on, the lid flange is extended unsealing knob piece, the opening for the tab is fixed by a fixing means reconsolidation not folded inward at the upper surface valley fold at a predetermined position of the lid The folded portion of the opening tab is fitted to the lower part of the guard wall portion of the container body when the lid is closed .

  As described above, the inner fitting packaging container with a tamper-proof structure according to the present invention and its lid body are easy to manufacture and handle because the container body and the lid body are separate structures. Since the outer surface of the lid fitting wall portion of the lid is in close contact with the inner surface of the main body fitting wall portion of the container main body over the entire circumference, excellent hermetic sealing performance is obtained. In addition, a guard wall portion is formed over the entire circumference of the main body flange portion so that the lid can be opened only from a specific location, i.e., the opening tab of the lid, and the opening tab is folded inward. Because it is fixed to the lid by a fixing means that cannot be re-fixed, in the unlikely event that the unlocking tab is released due to mischief, the trace remains clearly and can be easily visually confirmed, Therefore, unauthorized tampering can be effectively prevented. Furthermore, since the reverse-tapered body fitting wall and lid fitting wall are formed over the entire circumference, excellent sealing and sealing properties can be obtained and re-sealed by re-sealing even after opening. Even when the finished food remains, it can be re-sealed and used.

The perspective view which shows the closed state of the container for inner fitting packaging in one Embodiment of this invention. The top view which shows the closed state of the packaging container. (A) is principal part sectional drawing of the location in which the opening picking piece is not formed in the packaging container, (b) is principal part sectional drawing of the location in which the opening picking piece is formed in the packaging container. FIG. It is a top view which shows the principal part of the cover body of the packaging container, Comprising: (a) shows the state before folding back the opening tab, and (b) folding back the opening tab and fixing it. Shows the state. (A) And (b) is a top view which shows the principal part of the cover body of the packaging container, (c) is sectional drawing of (b).

  Hereinafter, an inner fitting packaging container with a tamper-proof structure according to an embodiment of the present invention will be described with reference to FIGS. The inner fitting packaging container according to the present embodiment is capable of containing various kinds of foodstuffs, and the container main body 1 having an upper surface opening and the container main body 1 to close the opening of the container main body 1. And a lid 2 configured to be resealable by internal fitting. Both the container body 1 and the lid body 2 are formed by thermoforming a synthetic resin sheet. Therefore, in principle, the inner surface and the outer surface are in an integrated relationship, and if the inner surface is convex, the corresponding portion of the outer surface is concave. The foodstuffs to be contained are not particularly limited, but foodstuffs containing moisture such as salads and cut fruits are suitable, and an internal fitting structure is adopted, so that foodstuffs containing liquids such as moisture are contained. However, it is difficult for the liquid to spill on the way home. Moreover, it is suitable also for the use which heat-cooks with a microwave oven as a heat resistant container.

  The container body 1 preferably has a substantially circular shape in plan view, and in the present embodiment, an example of a substantially circular shape in plan view is exemplified. The container main body 1 includes a substantially circular bottom surface (not shown), a main body side wall that rises upward from the periphery of the bottom surface, and a main body flange that extends outward from the upper end of the main body side wall. Part. The bottom surface portion is substantially circular, and the main body side wall portion has a cylindrical shape as the diameter gradually increases upward, but various ribs may be provided on the bottom surface portion and the main body side wall portion. The main body flange portion extends from the upper end of the main body side wall portion to the side, and is formed over the entire circumference.

  A main body fitting wall portion 10 is formed over the entire circumference at the upper end portion of the main body side wall portion. The main body fitting wall portion 10 is formed in a reverse taper shape whose diameter is reduced inward toward the upper side, and a lid fitting wall portion 23 of the lid body 2 described later is fitted therein. In addition, the reverse taper shape should just be diameter-reduced inward toward the upper side as a whole, and may become partially perpendicular | vertical. The main body fitting wall portion 10 becomes a continuous sealing surface that is not interrupted all around the inner surface, and the outer surface of the lid fitting wall portion 23 of the lid body 2 is in close contact therewith. That is, the inner surface of the main body fitting wall portion 10 and the outer surface of the lid fitting wall portion 23 become an annular seal surface. A supporting surface portion 11 extending substantially horizontally from the lower end of the main body fitting wall portion 10 to the inside is formed on the lower side of the main body fitting wall portion 10, and is formed on the lower side of the supporting surface portion 11. The side wall main portion 12 extends downward from the inner edge of the support surface portion 11. A tapered chamfered portion 13 whose diameter increases toward the upper side is formed on the upper side of the main body fitting wall portion 10, and a main body flange portion is extended above the main body fitting wall portion 10 via the chamfered portion 13. It is preferable. In other words, it is preferable to form the chamfered portion 13 at the boundary portion between the main body fitting wall portion 10 and the main body flange portion because the lid body 1 can be easily fitted.

  The main body flange portion includes a flange main portion 14 extending substantially horizontally from the upper end of the chamfered portion 13 to the outside, a guard wall portion 15 rising upward from an outer edge of the flange main portion 14, and an upper end of the guard wall portion 15. For example, a flange top surface portion 16 extending substantially horizontally toward the outside and a skirt wall portion 17 extending downward from the outer edge of the flange top surface portion 16 are provided. The guard wall portion 15 rises upward to guard the outer edge of the lid flange portion 24 from the outside so that the lid flange portion 24 described later cannot be picked up. Therefore, it is necessary that the protruding height of the guard wall portion 15 is higher than at least the upper surface of the lid flange portion 24. Preferably, even when the packaging container is bent, The height of the lid flange portion 24 is set such that the outer edge of the lid flange portion 24 does not float upward from the flange top surface portion 16. Furthermore, it is preferable that the inner peripheral surface of the guard wall portion 15 and the outer edge of the lid flange portion 24 are fitted. In particular, it is preferable that the lower portion 15b of the guard wall portion 15 has a slightly larger diameter than the upper portion 15a, or that the guard wall portion 15 has a reverse taper shape that becomes inward as the upper side.

  The flange top surface portion 16 is the highest portion of the container body 1 and it is preferable to form an anti-slip twill knurled eye or the like on the upper surface thereof. Although the height of the lower end of the skirt wall part 17 is arbitrary, it can be made into the substantially same height as the flange main part 14, for example. The guard wall portion 15, the flange top surface portion 16, and the skirt wall portion 17 constitute an annular guard ridge, and the guard wall portion 15 and the skirt wall portion 17 are respectively inner peripheral surfaces (inner side surfaces) of the guard ridge. And the outer peripheral surface (outer side surface). In this manner, an annular guard protrusion is provided on the outer side of the flange main portion 14, and the guard protrusion circulates outside the cover flange portion 24 of the lid body 2 when the cover is closed.

  In addition, it is preferable that the edge part 18 is extended in the lower end of the skirt wall part 17 toward the outer side. The edge portion 18 is a portion serving as an outer edge of the main body flange portion, and thus constitutes a portion serving as the outermost peripheral edge of the container body 1. It is preferable that the height of the edge portion 18 is substantially constant over the entire circumference. Moreover, it is preferable that the edge part 18 is provided over the perimeter, and the main body flange part can be effectively reinforced by the edge part 18 of the perimeter. The edge portion 18 is preferably provided substantially horizontally. Further, it is preferable to form a concavo-convex shape on the upper surface of the edging portion 18 by performing fine concavo-convex processing and embossing at the same time when the container body 1 is thermoformed. It is preferable to form in a waveform shape such as a trapezoidal wave. For example, by forming ridges and valleys along the inner and outer directions of the container body 1, that is, the width direction of the rim portion 18 alternately and continuously in the circumferential direction on the upper surface of the rim portion 18, an uneven shape is formed on the upper surface of the rim portion 18. Can be formed. The uneven shape on the upper surface of the border 18 can be formed by various knurled eyes such as flat knurled eyes and twill knurled eyes, and particularly formed by twill knurled eyes so as not to slip. Is preferred.

  The end surface of the edge portion 18 is a sheet cutting surface cut by a cutting blade at the time of sheet forming. By forming an uneven shape on the upper surface of the edge portion 18, the upper edge line (upper contour line) of the sheet cutting surface is formed. Corresponding to the uneven shape on the upper surface of the edging portion 18, a wavy shape is formed so as to wave up and down in a side view (or front view). In this way, the upper edge line of the edge portion 18 has a wave shape when viewed from the side, so that the fingertip that touches the container can be protected and the strength of the edge portion 18, that is, the strength of the sheet edge can be improved. Therefore, it is possible to effectively prevent tearing starting from the outer edge of the edge portion 18. Therefore, it is preferable that the embossed edge portion 18 is formed on the entire circumference of the main body flange portion. The uneven shape on the upper surface of the edge portion 18 may be formed so as to be continuous from the edge portion 18 to the skirt wall portion 17. The lower surface of the edging portion 18 may be a flat surface, but it is preferable to form an uneven shape on the lower surface corresponding to the unevenness of the upper surface.

  Next, the configuration of the lid body 2 will be described. The lid 2 has a structure that fits inside the container body 1 and has a shape corresponding to the container body 1, that is, a substantially circular shape in plan view. The lid body 2 includes a lid top surface portion 20, a lid side wall portion 21 extending downward from the periphery of the lid top surface portion 20, a groove bottom portion 22 extending substantially horizontally outward from the lower end of the lid side wall portion 21, A lid fitting wall portion 23 that extends upward from the outer edge of the groove bottom portion 22 and a lid flange portion 24 that extends outward from the upper end of the lid fitting wall portion 23 can be provided.

  The lid top surface portion 20 has a substantially circular shape in plan view, and its height is arbitrary, but for example, it is preferable to have a height substantially the same as that of the lid flange portion 24. An annular groove portion is formed outside the lid top surface portion 20, the inner side surface of the groove portion is a lid side wall portion 21, the outer side surface of the groove portion is a lid fitting wall portion 23, and the bottom surface of the groove portion is a groove bottom portion. 22. The groove bottom 22 preferably contacts the support surface 11 of the container body 1 and is supported thereby.

  The lid fitting wall portion 23 is a portion that is fitted into the main body fitting wall portion 10 of the container main body 1 and is in close contact therewith. The lid fitting wall portion 23 is formed in a reverse taper shape corresponding to the main body fitting wall portion 10 and having a diameter reduced inward and inclined toward the upper side. In addition, the reverse taper shape should just be diameter-reduced inward toward the upper side as a whole, and may become partially perpendicular | vertical. The lid fitting wall portion 23 is a continuous sealing surface that is not interrupted all around the outer surface, and the outer surface of the lid fitting wall portion 23 has a slightly larger diameter than the inner surface of the main body fitting wall portion 10. For this reason, the outer surface of the lid fitting wall portion 23 presses the inner surface of the main body fitting wall portion 10 outward and comes into close contact. The contact between the main body fitting wall 10 and the lid fitting wall 23 may be a line contact that makes contact with a line over the entire circumference, or a surface that makes contact with a belt-like surface over the whole circumference. The contact may be a single contact or a plurality of contacts in the height direction. In any case, the main body fitting wall portion 10 and the lid fitting wall portion 23 are in contact with each other over the entire circumference to form an annular tight seal portion, and the opening of the container main body 1 is sealed by the lid body 2. Is done.

  The configuration of the region inside the lid fitting wall portion 23 is arbitrary, and the lid top surface portion 20 is a flat configuration extending substantially horizontally from the lower end of the lid fitting wall portion 23 toward the inside. Alternatively, the lid side wall portion 21 may extend above the lid flange portion 24, and the lid top surface portion 20 may be formed at a position higher than the lid flange portion 24.

  The lid flange portion 24 is located above and overlaps the flange main portion 14 of the main body flange portion, and is preferably placed on the flange main portion 14 and supported by the flange main portion 14. The lid flange portion 24 has a shape corresponding to the flange main portion 14 in a plan view, and thus has an annular shape with a predetermined width together with the flange main portion 14. It is preferable to provide an uneven pattern for preventing slippage on the upper and lower surfaces of the lid flange portion 24.

  An opening knob 25 is provided at a predetermined position on the entire outer periphery of the lid flange portion 24 so as to extend outward. The opening tab 25 is folded inward by a valley fold on the upper surface and fixed to a predetermined portion of the lid 2 by a fixing means that cannot be fixed again. The opening tab 25 protrudes outward from the outer edge of the lid flange portion 24. However, the opening tab 25 is folded inward with the position of the outer edge of the lid flange portion 24 being the folded portion. The outer edge of the lid flange portion 24, that is, the outer edge of the lid body 2 has a circular shape with almost no protrusion.

  Although the shape of the opening tab 25 is arbitrary, it is formed, for example, in the shape of a tongue as shown in FIG. 4 (a), and preferably when it is folded back inward. The length is such that the surface portion 20 can be reached. Further, it is preferable that the width of the base end portion of the opening tab 25 is narrow so that the opening tab 25 can be easily folded and the folded state can be easily maintained. From the same point of view, it is also preferable to form the base end portion of the opening tab 25 so as to cross the fold line 26. The fold line 26 may be one as shown in FIG. 5A, or may be two or more as shown in FIGS. 5B and 5C. The folding line 26 may be various folding ruled lines. For example, as shown in the cross-sectional view of FIG. 5C, it is preferable to form a concave groove on the upper surface, and a natural folding state can be obtained. In addition, you may give various anti-slip processes to the picking piece 25 for opening.

  The fixing part of the opening tab 25 that is folded back inside may be any part of the lid 2. The fixed part may be on the proximal end side close to the folded portion of the opening tab 25, or on the distal end side far from the folded portion. However, since it is possible to easily prevent the folded opening tab 25 from being lifted, it is preferably fixed on the tip side. In addition, since the lid fitting wall portion 23 is provided, it is preferably fixed inside the lid fitting wall portion 23. When the groove portion is formed as described above, the groove portion is It is preferable to be fixed to the inner side, and in particular, when the lid top surface portion 20 has substantially the same height as the lid flange portion 24, it is preferably fixed to the lid top surface portion 20. However, when the lid top surface portion 20 is higher than the lid flange portion 24, the lid side wall portion 21 may be fixed, or may be fixed to the lid side wall portion 21 and the lid top surface portion 20.

  The fixing means for fixing the opening tab 25 is arbitrary, and at least once it is released, it can be fixed again by heat fusion fixing such as adhesive tape, adhesive, point seal, etc. Among them, it is preferable to use the adhesive tape 30 that cannot be reattached among them. As a configuration of the pressure-sensitive adhesive tape 30 that cannot be reattached, a laminated configuration in which a release layer is provided between the sheet base material and the adhesive layer can be representatively used. In this configuration, the pressure-sensitive adhesive tape 30 is attached to the adherend by an adhesive layer made of a pressure-sensitive adhesive on the back surface, but once the pressure-sensitive adhesive tape 30 is peeled from the adherend, the adhesive layer is bonded. The sheet base material and the adhesive layer are separated by peeling with the release layer with a force smaller than the strength. While the adhesive layer remains on the adherend, the sheet base material is separated from the adherend, and thus the adhesive tape 30 cannot be reattached. The release layer is broken in the layer and divided, or remains on the adherend together with the adhesive layer. The release layer can be, for example, a printing layer made of an ultraviolet curable ink, and the release layer may be a layer in which a resin binder and a powder filler are mixed, and further, uniaxial stretching containing an inorganic filler. It may be a thin film such as a polypropylene film. 1 to 4 illustrate a case where an adhesive tape 30 that cannot be reattached is used, and the opening tab 25 is fixed to the lid top surface portion 20 by the adhesive tape 30. The adhesive tape 30 may be attached only to the lid top surface portion 20 or may be attached to the lid flange portion 24 together with the lid top surface portion 20. In addition, it is preferable that the opening tab 25 is fixed to a predetermined portion of the lid 2 in advance by the adhesive tape 30 before the lid 2 is fitted inside the container body 1. The opening tab 25 may be fixed to a predetermined portion of the lid 2 after the opening is closed and the opening of the container body 1 is closed. The same applies to the folding of the opening tab 25, and it is preferable that the lid 2 is folded inward before the lid 2 is fitted inside the container body 1, but the lid 2 is fitted inside the container body 1. By doing so, the opening tab 25 may be brought into contact with the flange top surface portion 16 and the guard wall portion 15 and bent upward by a predetermined angle, and then bent further inward to be folded.

  The container body 1 and the lid body 2 are formed by so-called sheet molding. Sheet molding includes, for example, vacuum forming, pressure forming, vacuum pressure forming, double-sided vacuum forming, hot plate forming and the like, and in any case, it is formed by thermoforming a synthetic resin sheet. Here, examples of the synthetic resin sheet include a polyester resin such as polyethylene terephthalate, a styrene resin such as polystyrene, a sheet composed of a polyolefin resin such as polypropylene and polyethylene, and a stretched sheet obtained by stretching these. It is done. In addition, a synthetic resin foam sheet obtained by foaming the above-described synthetic resin, or a laminated sheet obtained by appropriately laminating a synthetic resin film thereon can also be used. A transparent sheet is preferable because the contents are highly visible. Examples of the transparent sheet include a sheet composed of the various synthetic resins described above and a stretched sheet obtained by stretching these. In addition, the synthetic resin sheets used for the container body 1 and the lid body 2 may be the same as or different from each other.

  As described above, the packaging container according to the present embodiment has a separate configuration in which the container body 1 and the lid body 2 are not connected to each other. Therefore, manufacture and transportation are easy, and handling is also possible. Easy. And since the lid fitting wall part 23 of the cover body 2 fits inside the main body fitting wall part 10 of the container main body 1 and adheres over the entire circumference, the opening of the container main body 1 is sealed. High sealing performance can be obtained. In particular, since the packaging container is substantially circular in plan view, a uniform sealing pressure can be obtained over the entire circumference, and high sealing performance can be easily ensured. Further, even after opening, if it is resealed, an excellent hermetic sealability can be obtained again. For example, even when the stored food or the like remains, it can be repeatedly resealed and used.

  Further, in the closed state, the outer edge of the lid flange portion 24 is guarded from the outside by the guard wall portion 15, so that the guard wall portion 15 guards even if the outer edge of the lid flange portion 24 is picked up by the fingertip and opened. It cannot be picked up. In particular, when the outer edge of the lid flange portion 24 is fitted inside the guard wall portion 15, the lid flange portion in addition to the inner fitting between the main body fitting wall portion 10 and the lid fitting wall portion 23. 24 also has a double internal fitting structure in which it is fitted inside the guard wall 15, so that the closed state becomes even more reliable. Since the opening tab 25 is folded inward and fixed to the upper surface of the lid 2 by a fixing means that cannot be re-fixed, it is assumed that the opening tab 25 is unlocked in an attempt to open it in a mischief. In this case, the opening tab 25 cannot be fixed to the lid 2 again. That is, the unsealed trace remains clearly, and the fact that it has been unsealed can be easily found by visual observation, so that tampering can be effectively prevented.

  Further, if the opening tab 25 is fixed in advance before the lid is closed, it is only necessary to press the lid 2 against the container body 1 from the upper side after the contents are accommodated, so that the working efficiency is further improved. Can be increased. In particular, when the non-reattachable adhesive tape 30 is used as a non-refixable fixing means, the opening tab 25 can be easily fixed to the lid 2 without using complicated equipment. Further, since the opening tab 25 is folded inward and does not protrude upward and does not protrude laterally from the container main body 1, it is used for opening at the time of transportation, storage, or display at a store. There is no case where the knob 25 collides with something and the fixing is not inadvertently released or opened.

  In addition, you may form in the cover body 2 the vapor | steam discharge part for discharging | emitting a vapor | steam outside at the time of the heating by a microwave oven. The vapor discharge part is preferably provided on the lid top surface part 20, but when the height of the lid top surface part 20 is higher than the lid flange part 24, it is also preferable to provide the vapor discharge part on the lid side wall part 21. Thus, when providing a vapor | steam discharge part, it is preferable to cover the vapor | steam discharge part with the knob 25 for opening. When the steam discharge part is covered with the opening tab 25, in the unopened state, communication between the inside and outside of the container through the steam discharge part is prevented, and high sealing performance is obtained. When the opening tab 25 is released, the steam discharge part is exposed. During heating by the microwave, the steam inside the packaging container is discharged from the steam discharge part to the outside, and the internal pressure rises excessively. Can be prevented.

  In particular, it is preferred that the adhesive force is reduced by heat due to heating and the fixing of the opening tab 25 is automatically released, and the labor of releasing the opening tab 25 before heating by the microwave oven is saved. The unopened packaging container can be heated as it is in a microwave oven. The structure of the vapor discharge part is arbitrary, and can be a through-hole or a U-shaped cut, for example, and is a non-through hole in the manufacturing stage. It is also possible to adopt a configuration that penetrates by heat or internal pressure during heating by a microwave oven. When the steam discharge part is a through hole, it can be closed by the opening knob 25, and when the steam discharge part is a non-penetrating structure, it can be protected by the opening knob 25. it can. The holes include not only round holes but also various shapes of cuts.

  In this embodiment, the packaging container is substantially circular in plan view, but may be substantially rectangular in plan view. However, by using a packaging container having a substantially circular shape in plan view, the adhesion force between the body fitting wall 10 and the lid fitting wall 23 is likely to be uniform over the entire circumference in the closed state. High hermetic sealability is obtained.

DESCRIPTION OF SYMBOLS 1 Container main body 2 Lid body 10 Main body fitting wall part 11 Support surface part 12 Side wall main part 13 Chamfering part 14 Flange main part 15 Guard wall part 15a Upper part 15b Lower part 16 Flange top surface part 17 Skirt wall part 18 Edge part 20 Lid surface part 21 Lid side wall part 22 Groove bottom part 23 Lid fitting wall part 24 Lid flange part 25 Opening tab 26 Bending line 30 Adhesive tape (fixing means)

Claims (5)

A container body and a lid body that are thermoformed separately from each other from a synthetic resin sheet, and the lid body is an inner fitting packaging container that is fitted inside the container body,
The container body includes a reverse-tapered body fitting wall portion whose entire inner surface is a sealing surface, and a body flange portion formed outside the body fitting wall portion,
The lid includes an inverted taper-shaped lid fitting wall portion whose entire outer surface is a sealing surface, and a lid flange portion formed outside the lid fitting wall portion,
The body flange of the container body, so that it can not be picking up the cover flange, the guard wall that rises upwardly in order to guard the outer edge of the lid flange from the outside is formed over the entire circumference, the guard wall The upper part of the part is formed with a smaller diameter than the lower part of the guard wall,
The opening flange is extended to the lid flange portion, the opening knob is folded back inside by the upper surface valley fold, and fixed to a predetermined portion of the lid by a fixing means that cannot be fixed again ,
An inner-fitting packaging container with a tamper-proof structure, wherein a folded portion of an opening tab is fitted to a lower part of a guard wall of a container body .   The cover with a tamper-proof structure according to claim 1, wherein the lid is formed with a steam discharge portion for discharging steam to the outside during heating by a microwave oven, and the steam discharge portion covers the opening portion. Fitting packaging container.   The inner fitting packaging container with a tamper-proof structure according to claim 2, wherein the fixing of the opening tab is released by heating.   The inner fitting packaging container with a tamper-proof structure according to any one of claims 1 to 3, wherein the fixing means that cannot be re-fixed is an adhesive tape that cannot be re-attached. The lid of the inner fitting packaging container that is thermoformed from the synthetic resin sheet separately from the container body thermoformed from the synthetic resin sheet, and is internally fitted to the container body,
The container body is configured to include a reverse-tapered body fitting wall portion whose entire inner surface is a sealing surface, and a body flange portion formed outside the body fitting wall portion,
The lid body includes an inverted tapered lid fitting wall portion whose entire outer surface is a sealing surface, and a lid flange portion formed outside the lid fitting wall portion,
In the main body flange part of the container main body, a guard wall part rising upward is formed over the entire circumference so as to guard the outer edge of the cover flange part from the outside so that the lid flange part cannot be picked up when the cover is closed. The upper part of the guard wall is formed with a smaller diameter than the lower part of the guard wall.
The opening flange is extended to the lid flange portion, the opening knob is folded back inside by the upper surface valley fold, and fixed to a predetermined portion of the lid by a fixing means that cannot be fixed again ,
A lid for an internally fitted packaging container with a tamper-proof structure, wherein the folded portion of the opening tab is fitted to the lower part of the guard wall of the container body when the lid is closed .

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