JP2009286449A - Container for packaging - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for packaging which smoothly attaches/detaches a lid to/from a container body without being affected by shrinkage of the lid after being molded by a thermoforming. <P>SOLUTION: The container includes the container body with an opening formed at the upper end and the lid which can close the opening. The container body includes a bottom part, a peripheral wall which stands from the periphery of the bottom part and defines the opening and a flange part projectign outward from the upper edge of the peripheral wall, and the lid includes a lid body opposing to the opening, a projection part which projects outward from the periphery of the lid body and can be placed on the flange part, and a vertical hang down part which is hung down from the periphery of the projection part. Two or more engaging projections projecting inward are formed at a space in the peripheral direction on the vertical hang down part so that the engaging projection may get over the flange part to make engaging projection and the flange part engage with each other when the projection part is arranged on the flange part, and an extension part, which is extensible in the peripheral direction, is provided at least at any one of spaces between the engaging projections on the vertical hang down part of the lid. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packaging container for packaging food such as sugar beet.

  2. Description of the Related Art Conventionally, various packaging containers for packaging foods such as sugar beet have been provided. As one example, as shown in FIG. 9, a container body 50 having an opening 500 for containing food at the upper end, and a lid body 60 formed by a thermoforming method so as to be able to close the opening 500. And the lid body 60 and the container body 50 are engaged with each other so that the lid body 60 is not inadvertently detached from the container body 50.

  Specifically, the container body 50 includes a bottom portion 501, a peripheral wall 502 standing from the outer periphery of the bottom portion 501 to define the opening 500, and a flange portion extending outward from an upper end of the peripheral wall 502. 503.

  The lid 60 includes a lid main body portion 600 that faces the opening 500, an extension portion 601 that extends outward from the outer periphery of the lid main body portion 600 and can be placed on the flange portion 503, A hanging portion 602 that hangs down from the outer periphery of the extending portion 601 is provided. The hanging portion 602 is formed with two or more engaging projections 603... Projecting inwardly at intervals in the circumferential direction.

  Such a container main body 50 and the lid body 60 are produced by a thermoforming method. That is, the synthetic resin sheet is heated and pressed against the mold by vacuum, compressed air, or a combination thereof, and the synthetic resin sheet is swelled into a predetermined shape on one side, and then the swelled periphery is It is produced by cutting (punching).

  As shown in FIGS. 10, 11 (a), and 11 (b), the packaging container 5 having the above-described configuration has the extended portion 601 as a ridge when the opening 500 of the container body 50 is closed with the lid body 60. By disposing the lid 60 on the container body 50 so as to overlap with the main body 503, the engaging convex portions 603... Overcome the outer peripheral end of the flange portion 503, and the engaging convex portions 603. On the contrary, when the lid 60 is removed from the container body 50, the lid 60 is lifted so that the engaging projections 603 ... get over the outer peripheral end of the flange 503 and the engagement projections. 603... And the flange portion 503 are disengaged.

  That is, the packaging container 5 having the above-described configuration has an engagement convex portion with respect to the flange portion 503 when the lid body 60 is attached or detached due to a minute deformation of the lid body 60 by forming the lid body 60 thin by a thermoforming method. 603 ... is allowed to get over.

  As a result, the packaging container 5 having the above-described configuration allows the lid body 60 to be attached and detached, but prevents the lid body 60 from being inadvertently detached from the container body 50 and maintains a good hygiene state. However, food can be packaged (see, for example, Patent Document 1).

  And the packaging container 5 of the said structure considers the presence or absence of the heat processing (warming with a microwave oven) with respect to food, the presence or absence of the oil content of food, etc., and heat resistance, oil resistance, etc. are requested | required of the cover body 60 The material (synthetic resin) excellent in heat resistance and oil resistance is selected for the synthetic resin sheet for forming the lid 60.

Thereby, the said container 5 for packaging can package a foodstuff in an appropriate state, without being influenced by heat processing or the oil content of a foodstuff.
Registered Utility Model No. 3023311

  By the way, the synthetic resin (sheet) used in the thermoforming method shrinks over time after molding depending on various conditions such as molding conditions (stretching conditions, heating / cooling conditions, etc.) and storage conditions after molding. There is something that ends up. In particular, a crystalline synthetic resin, which is excellent in heat resistance and hot water resistance, has a remarkable shrinkage compared to other synthetic resins.

  Therefore, even if the lid body 60 is molded with a preset normal design dimension, the lid body 60 may shrink over time after molding, and it may be difficult to attach the lid body 60 to the container body 50. is there.

  That is, in the packaging container 5 having the above-described configuration, the dimensions and shapes of the extending portion 601 and the hanging portion 602 in the lid body 60 are set in consideration of the fitting with the container body 50. If the part 602 contracts in the circumferential direction, the lid part 503 and the hanging part 602 interfere with each other, and as a result, it becomes difficult to get over the engagement convex part 603. There is a problem that it becomes difficult to attach and detach (fitting between the container body 50 and the lid 60).

  Therefore, in view of such circumstances, the present invention provides a packaging container that can be smoothly attached to and detached from the container body without being affected by the shrinkage of the lid after molding by the thermoforming method. The task is to do.

  A packaging container according to the present invention includes a container body having an opening for containing food at the upper end, and a lid formed by a thermoforming method so as to be able to close the opening. Comprises a bottom, a peripheral wall standing from the outer periphery of the bottom to define the opening, and a flange extending outward from an upper end of the peripheral wall, and the lid body is a lid facing the opening A main body portion, an extension portion extending outward from the outer periphery of the lid main body portion and capable of being placed on the flange portion, and a hanging portion depending from the outer periphery of the extending portion; There are two or more engaging projections protruding inward in the circumferential direction, and when the extending portion is arranged on the flange, the engagement projection moves over the flange and In the packaging container configured such that the mating convex portion and the flange portion engage with each other, the lid body is at least one of the hanging portions Wherein the expandable extension in the circumferential direction between the one engaging the convex portion. Here, the “thermoforming method” is a manufacturing method in which a thermoplastic resin sheet is heated and softened to form a molded product by adjusting the shape into a predetermined shape and cooling, for example, vacuum forming It is a concept including air pressure forming, vacuum pressure forming and the like.

  According to the packaging container having the above-described configuration, when the opening of the container body is closed with the lid, the engagement protrusion is formed by arranging the lid on the container body so that the extension portion overlaps the flange. The engagement convex part and the collar part are engaged with each other over the outer peripheral end of the collar part. Conversely, when the lid body is removed from the container body, the engagement convex part is lifted up. Gets over the outer peripheral end of the collar, and the engagement between the engagement projection and the collar is released. Thereby, the packaging container having the above-described configuration can package food while maintaining a good hygiene state without allowing the lid to be carelessly removed from the container body, while allowing the lid to be attached and detached.

  And since the extension part which can be expanded in the circumferential direction is provided between the at least any one engagement convex part in a hanging part, the above-mentioned lid body extends in the circumferential direction, and the hanging part Can be expanded in the circumferential direction. Thereby, even if the drooping portion of the lid body contracts in the circumferential direction after molding, the drooping portion expands (extends) in the circumferential direction due to the expansion of the expansion portion, thereby preventing interference between the collar portion and the drooping portion. The overhanging of the engaging convex portion with respect to the collar portion is allowed. Therefore, the lid can be attached to and detached from the container main body without being affected by the shrinkage after molding in the lid.

  As one aspect of the present invention, the extension portion may be formed to bulge outward. In this way, the extended portion is formed with a portion extending outward, so that a tensile force acts in the circumferential direction so that the portion extending outward is formed. It will fall inside. As a result, the extended portion extends in the circumferential direction and the hanging portion expands in the circumferential direction, so that interference between the flange portion of the container body and the hanging portion of the lid body is prevented, and the flange portion of the engaging convex portion Overcoming is allowed.

  As another aspect of the present invention, the extension portion may be formed so as to straddle at least the hanging portion and the extension portion. In this way, the extended portion is formed in a state where the outwardly extending portion straddles the hanging portion and the extending portion. The part that extends to the center easily falls in the circumferential direction. As a result, it becomes easy to make the hanging part expand in the circumferential direction, the interference between the hook part of the container body and the hanging part of the lid body is prevented, and the overhang of the engaging convex part to the hook part is allowed. become.

  As another aspect of the present invention, the container body has a peripheral wall formed in a rectangular tube shape, the flange portion is continuously formed over the entire upper end of the peripheral wall, and the lid body includes at least the peripheral wall Engaging convex portions may be formed at positions corresponding to the respective corner portions. If it does in this way, positioning of a lid to a container main part can be ensured. In addition, since the extended portion is formed at a portion of the hanging portion that extends straight or substantially straight, it is easy to expand in the circumferential direction.

  As described above, according to the packaging container of the present invention, the lid can be smoothly attached to and detached from the container body without being affected by the shrinkage of the lid after molding by the thermoforming method. An excellent effect can be achieved.

  Hereinafter, a packaging container according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the packaging container according to this embodiment includes a container body 10 having an opening 100 (see FIG. 1) formed at the upper end for containing food, and an opening 100 of the container body 10. And a lid 20 formed so as to be able to be closed.

  The container body 10 according to the present embodiment is formed by a thermoforming method using a synthetic resin sheet. Here, the thermoforming method is a production method in which a thermoplastic resin sheet is heated and softened to form a molded product by adjusting the shape to a predetermined shape and cooling, for example, vacuum forming or pressure forming, It is a concept including vacuum / pressure forming. Accordingly, the container body 10 is cooled after being pressed against the mold while heating the synthetic resin sheet by vacuum, compressed air, or a combination thereof, and bulging the synthetic resin sheet into a predetermined shape on one side. It is produced by cutting (punching) the bulged area.

  As shown in FIG. 1, the container body 10 according to this embodiment includes a bottom 101, a peripheral wall 102 that stands up from the outer periphery of the bottom 101 and defines the opening 100, and outward from the upper end of the peripheral wall 102. And an eaves part 103 extending toward the end.

  The bottom 101 according to the present embodiment is formed in a substantially rectangular shape in plan view. Accordingly, the peripheral wall 102 is formed in a rectangular tube shape corresponding to the bottom portion 101. In this embodiment, the peripheral wall 102 is formed in a tapered shape so that the internal space expands from the lower end toward the upper end. That is, the peripheral wall 102 of the container main body 10 according to the present embodiment is inclined at a predetermined angle outward with respect to a center line (not shown) extending in the vertical direction, and the first enlargement expands the internal space from the lower end upward. Part 102a and the upper end of the first enlarged part 102a are formed to be continuous with the center line extending in the vertical direction and inclined outwardly at an angle larger than the predetermined angle, further extending the internal space upward. It is comprised with the 2nd expansion part 102b to expand.

  As is apparent from the drawing, the container body 10 according to the present embodiment has a connection portion between the bottom portion 101 and the peripheral wall 102, and four corner portions Ca1, Ca2 formed by making the peripheral wall 102 into a rectangular tube shape. , Ca3, Ca4 are formed with roundness.

  As shown in FIGS. 1 and 3, the flange portion 103 according to the present embodiment is continuously formed over the entire upper end of the peripheral wall 102. In addition, in FIG. 3, the container main body 10 is shown with the dashed-two dotted line. Thereby, the collar part 103 is formed in the planar view cyclic | annular form. As shown in FIGS. 1, 3, 4 (a) and 4 (b), the collar portion 103 according to the present embodiment includes a collar body 104 extending outward from the upper end of the peripheral wall 102, and the collar body. And a drooping lower portion 105 hanging from the outer periphery of 104. Since the container body 10 according to the present embodiment is formed by a thermoforming method using a synthetic resin sheet as described above, the margin 106 for punching after molding is formed on the outer periphery of the hanging portion 105. Remains in a state of extending outward. Therefore, the packaging container 1 of the present embodiment treats the outer periphery of the margin 106 as the outer periphery of the container body 10 (the flange 103), and the size of the lid 20 (the hanging part 202 described later) is determined based on this. ing.

  The lid 20 according to the present embodiment is formed by a thermoforming method similarly to the container body 10. Accordingly, the lid 20 is also pressed against the mold while heating the synthetic resin sheet by vacuum, compressed air, or a combination thereof, and the synthetic resin sheet is formed into a predetermined shape (form described below) on one surface side. After the bulging, it is produced by cutting (punching) the periphery that is cooled and bulged.

  Here, the synthetic resin sheet for forming the lid 20 has a thickness of 0.15 mm or more and 2.0 mm or less, and is a non-foamed resin sheet or an expansion ratio of 20 times or less, preferably 5 times. The following foamed synthetic resin sheets, and further laminated sheets obtained by laminating these sheets can be employed. In addition, as the material (synthetic resin) of the sheet, a thermoplastic resin in which polystyrene, polypropylene, polyethylene terephthalate, polycarbonate, or the like is used alone, or a plurality of them are mixed in an arbitrary ratio can be used, and further, the resin characteristics are adjusted. It is also possible to use a compounding raw material that imparts the rubber properties of These synthetic resin materials can be used by mixing fillers, compatibilizers, additives, colorants and the like.

  And the cover body 20 which concerns on this embodiment becomes a form with which the outer surface side corresponded to the inner surface side by shape | molding by the said thermoforming method. That is, the lid 20 is formed in a shape in which the outer surface side protrudes while the inner surface side is recessed.

  Specifically, as shown in FIGS. 1 to 4, the lid body 20 extends outward from the outer periphery of the lid body portion 200, the lid body portion 200 facing the opening 100 of the container body 10, The extending part 201 which can be mounted on the collar part 103, and the hanging part 202 which hangs down from the outer periphery of the extending part 201 are provided.

  The shape of the lid body 200 is not particularly limited as long as the lid body 200 is formed so as to be able to face the entire area of the opening 100 of the container body 10 (can be closed by covering the opening 100). The top part 200a is formed in a size smaller than the opening 100 and substantially similar to the opening 100, and the lid wall part 200b hangs down from the outer periphery of the top part 200a. As described above, the top portion 200a is formed in a substantially similar shape to the opening 100 of the container body 10, and thus is formed in a substantially rectangular shape in plan view in the present embodiment. In this embodiment, since the peripheral wall 102 of the container body 10 is formed in a rectangular tube shape, the lid wall portion 200b is also formed in a rectangular tube shape. In addition, the lid 20 according to the present embodiment is formed in the vicinity of the boundary between the top portion 200a and the lid wall portion 200b, or by forming the lid wall portion 200b into a rectangular tube shape with a gap in the circumferential direction. The two corners Cb1, Cb2, Cb3, and Cb4 are rounded.

  The extending portion 201 extends outward from the lower end of the lid wall portion 200b. The extending part 201 is formed so as to be continuous over the entire lower end of the lid wall part 200b. Thereby, the extension part 201 is formed in a ring shape in plan view so that it can be placed on the collar part 103 (the collar body 104) of the container body 10. And the lid 20 according to the present embodiment is formed with an annular convex portion (not numbered) with the boundary portion between the lid wall portion 200b and the extending portion 201 slightly protruding inward (FIG. 4A). And FIG. 4B). Thereby, the collar part 103 is interposed between the hanging part 202 and the annular convex part in a state where the extending part 201 is placed on the collar part 103, so that the lid body 20 can be positioned with respect to the container body 10. It has become.

  The drooping portion 202 is formed so as to extend downward from the outer periphery of the extending portion 201. The hanging portion 202 is formed in an endless annular shape so as to be continuous over the entire outer circumference of the extending portion 201. The hanging part 202 is in a state in which a portion other than the expansion part 205 and the engaging convex part 204... Described later forms a slight gap with respect to the outer periphery of the flange part 103 or is in sliding contact with the outer periphery of the flange part 103. In the state, the design dimension is set so that it can be externally fitted to the flange 103. This design dimension is the dimension immediately after being molded by the thermoforming method as described above, that is, the dimension corresponding to the mold dimension.

  It is noted that the alternate long and short dash line CL shown in FIG. 3 corresponds to the case where the hanging portion 202 is formed in an annular shape so as to surround the collar portion 103 without forming the engaging convex portion 204 and the expanding portion 205 on the hanging portion 202. The center line in the thickness direction of the drooping portion 202 is shown. That is, the alternate long and short dash line CL in FIG. 3 indicates that the inner peripheral surface of the hanging portion 202 forms a slight gap with respect to the entire outer periphery of the flange portion 103 of the container body 10 or the outer periphery of the flange portion 103. This is the center line through which the drooping portion 202 passes when the drooping portion 202 is formed in an annular shape with no irregularities inside and outside so that it can be externally fitted to the collar portion 103 in a sliding contact state. 202 is a reference line (hereinafter referred to as a reference line) for 202 (protrusion of the engaging convex portion 204 and swelling of the extended portion 205).

  The hanging portion 202 is formed with two or more engaging convex portions 204 projecting inwardly at intervals in the circumferential direction. As a result, in the packaging container 1 according to the present embodiment, when the extending portion 201 is disposed on the flange portion 103, the engaging convex portions 204 ... get over the flange portion 103 (margin allowance 106) and the engagement The mating convex portions 204 and the flange portion 103 are configured to engage with each other.

  In the packaging container 1 according to the present embodiment, as the peripheral wall 102 of the container body 10 is formed in a rectangular tube shape, the entire lid 20 has a rectangular shape in plan view. The four corners Cb1, Cb2, Cb3, and Cb4 (corner portions corresponding to the four corners Ca1, Ca2, Ca3, and Ca4 of the flange 103) formed in the circumferential direction of the drooping portion 202 are formed. Thereby, the lid 20 is engaged with each of the four corners Ca1, Ca2, Ca3, Ca4 (two pairs of corners Ca1, Ca2, Ca3, Ca4 at the diagonal positions) of the container body 10. The convex portions 204 can be engaged with each other.

  As shown in FIG. 5A, each of the engaging protrusions 204 has a protrusion amount X from the inner surface of the hanging part 202 around the engaging protrusion 204 of 0.3 mm or more and 3.5 mm or less, preferably , 0.8 mm or more and 2.0 mm or less. That is, when the protrusion amount X of the engagement convex portions 204 is larger than 3.5 mm, it is difficult to release the mold by thermoforming, and the protrusion amount X of the engagement convex portions 204 is less than 0.3 mm. If it becomes small, each engagement convex part 204 ... is set as the above-mentioned dimension from the reason that engagement with the collar part 103 becomes difficult to become reliable.

  The lid 20 according to the present embodiment is provided with expansion portions 205 that can be expanded in the circumferential direction between at least any one of the protrusions 204 in the hanging portion 202. In the present embodiment, as shown in FIG. 3, extended portions 205 are provided between the engaging convex portions 204. That is, the lid 20 according to the present embodiment is provided with the extended portions 205... On each side that defines a rectangular shape in plan view.

  The extended portions 205 according to the present embodiment are formed so as to bulge outward. Accordingly, each of the expansion portions 205... According to the present embodiment includes a pair of expansion extension portions 205 a and 205 b that extend outward with a space in the circumferential direction of the drooping portion 202, and a pair of expansion portions. An extension connecting portion 205c is formed by connecting the leading ends of the extension portions 205a and 205b. When the circumferential portion (tensile force) acts on the drooping portion 202, the expansion portions 205 ... are caused by the tip ends of the pair of expansion extension portions 205a and 205b falling inward, The drooping portion 202 extends (becomes longer) in the circumferential direction. That is, each of the extension portions 205... Has a pair of extension extension portions 205 a and 205 b on the other side (for one extension extension portion 205 a, the other extension extension portion 205b and the other extension extension portion). When the portion 205b is tilted toward one of the extending portions 205a for expansion, the distance between the engaging convex portions 204 becomes longer, and the entire hanging portion 202 expands in the circumferential direction (the hanging portion 202). The peripheral length on the reference line CL ignoring the inner and outer irregularities becomes longer).

  As described above, the extended portions 205 are formed such that the inner peripheral surface of the drooping portion 202 (the inner peripheral surface other than the engaging convex portion 204 and the extended portion 205) is slightly with respect to the outer periphery of the flange portion 103 of the container body 10. Of the hanging part 202 on the assumption that the design dimension is set so that it can be externally fitted to the flange 103 in a state where a large gap is formed or in a state of sliding contact with the outer periphery of the flange 103. It is preferable to set it so that it can be expanded by 0.1 to 1% with respect to the circumference (design dimension).

  That is, since the rule of thumb indicates that the shrinkage of the lid body 20 after molding (shrinkage rate in the circumferential direction of the drooping portion 202) is very small, the number of expansion portions 205... × The length (mm) of one extension extending portion 205a, 205b is 0.1% to 1% with respect to the standard circumferential length of the drooping portion 202, as shown in FIGS. As shown in (b), the length Y of the extension extending portions 205a and 205b of each extension portion 205 is set.

  Here, an example of the extension portion 205 (a pair of extension extension portions 205a and 205b) will be described with specific dimensions. On the premise that the inner periphery of the drooping portion 202 of the lid body 20 is substantially slidably contacted with the outer periphery of the flange portion 103, the flange portion 103 of the container body 10 is formed in a rectangular shape having an outer dimension of 100 mm × 150 mm. 10 (the flange 103) has an outer peripheral length of about 500 mm (= 100 mm × 2 sides + 150 mm × 2 sides), and the hanging portion 202 of the lid 20 is formed in a rectangular shape with an inner dimension of 100 mm × 150 mm. The inner circumferential length is about 500 mm (= 100 mm × 2 sides + 150 mm × 2 sides). And the extension part 205 ... is provided in two places in the drooping part 202 of the cover body 20, and the extension amount in the extension part 201 for expansion | extension of each extension part 205 ... (extension amount from the outer surface of the surrounding drooping part 202) Y is set to 0.5 mm.

  Then, as shown in FIG. 5 (c), when the expansion portions 205 are expanded (when the expansion extension portions 205a and 205b are collapsed), the engagement convex portions 204 are provided with the expansion portions 205. And the peripheral length of the drooping portion 202 (peripheral length on the reference line CL) is increased by 2 mm (= 0.5 mm × 4), which is about 0. 0 with respect to the standard drooping portion 202 (inner peripheral length: 500 mm). It will be expanded by 4%.

  Accordingly, the container body 10 (the collar 103) is formed in a rectangular shape having an outer dimension of 100 mm × 150 mm, and the lid 20 (the hanging part 202) is formed in a rectangular shape having an inner dimension of 100 mm × 150 mm. In the case where four expansion portions 205 are provided as shown in FIG. 5, one expansion extension portion from 500 mm (= 100 mm × 2 + 150 mm × 2) ÷ (4 locations × 2) × 0.1% to 1% The length Y of 205a and 205b is set to about 0.06 mm to 0.6 mm. In each figure, each configuration of the container body 10 and the lid 20 is exaggerated with respect to the actual one so that the configuration can be clearly understood.

  Since the lid 20 according to the present embodiment is formed by a thermoforming method using a synthetic resin sheet as described above, the post-molding punching is performed on the entire periphery of the lower end outer periphery of the drooping portion 202. The margin 206 is left in a state of extending outward. In the present embodiment, the margin allowance 206 is formed so that the portions corresponding to the two corner portions Cb1 and Cb3 at the diagonal positions protrude outward from the other portions, and the portion is a lid. A gripping piece 207 that is gripped when 20 is opened and closed. If the margin 206 is formed on the entire periphery of the lower end of the drooping portion 202, there is a possibility that the expansion of the expansion portion 205 is hindered. However, the margin 206 of the lid 20 has a small unevenness (not shown). ) Are formed continuously in a plurality of circumferential directions, so that the margin allowance 206 can also be expanded in the circumferential direction as the expansion portions 205. The unevenness of the margin allowance 206 is formed by pressing (pressing) when punching out the synthetic resin sheet.

  The packaging container 1 according to this embodiment has the above-described configuration, and next, a usage mode of the packaging container 1 will be described. As shown in FIGS. 1 and 2, the packaging container 1 having the above-described configuration accommodates food (not shown) in the container body 10 from the opening 100 of the container body 10 and then opens the container body 10 with the lid 20. By closing 100, food is packaged. Specifically, as illustrated in FIGS. 4A and 4B, the extending portion 201 of the lid body 20 is placed on the ridge portion 103 (the cocoon body 104) of the container body 10 containing the food. The lid 20 is arranged as described above. That is, the extended portion 201 is disposed on the flange portion 103 after the corner portions Ca1, Ca2, Ca3, Ca4 of the container body 10 and the corner portions Cb1, Cb2, Cb3, Cb4 of the lid body 20 correspond to each other.

  At this time, by pushing the lid 20 toward the container body 10 from above, the hanging portion 202 moves downward while facing the outer periphery of the flange portion 103, and the engaging convex portion 204 formed on the hanging portion 202. ... will get over the outer peripheral edge of the flange 103 of the container body 10. As a result, the engaging projections 204 are engaged with the lower side of the flange 103, and the lid 20 is not inadvertently detached from the container body 10 in a state where food is packaged.

  And since the said lid 20 is shape | molded by the thermoforming method, the drooping part 202 and other site | parts shrink | contract after shaping | molding, and attachment (fitting) with respect to the container main body 10 may become difficult, In the packaging container 1 according to the present embodiment, since the hanging portion 202 is formed with the expansion portion 205 that can be expanded in the circumferential direction, as described above, when pushed into the container body 10 from above, The expansion portion 205... Is expanded by the action of the force, and the drooping portion 202 that faces (encloses) the outer periphery of the flange 103 of the container body 10 expands in the circumferential direction.

  That is, the contact force between the outer periphery of the container body 10 (the outer periphery of the flange portion 103) and the drooping portion 202 of the lid body 20 when a pushing force is applied to the lid body 20, or the flange portion 103 and the engaging convex portion 204. When the abutting force is larger than that in the normal fitting state, the component force of the abutting force acts in the circumferential direction of the drooping portion 202. As a result, as shown in FIG. 5B and FIG. The extension extending portions 205a and 205b extending outward in a state where there is no pushing action on the lid 20 fall down toward the center of the lid 20.

  Then, as a result of the hanging portion 202 extending in the circumferential direction along with the posture change of the extension portions 205a and 205b for expansion, interference between the outer periphery of the container body 10 (outer periphery of the flange portion 103) and the hanging portion 202 of the lid body 20, The state of interference between the flange 103 and the engaging projections 204 is substantially the same as the appropriate state. Accordingly, when the lid 20 is continuously pushed toward the container body 10 in the state where the expanded portions 205 are expanded, the engagement convex portions 204 formed on the hanging portion 202 are the outer peripheral ends of the flange portion 103 of the container body 10. You will get over the edge. As a result, the engaging projections 204 are engaged with the lower side of the flange 103, and the lid 20 is not inadvertently detached from the container body 10 in a state where food is packaged.

  When removing the lid 20, the gripping piece 207 is gripped and the lid 20 is lifted (pulled up), so that the engaging projections 204... (Being engaged with the collar 103 are located below the collar 103. As a result of the engaging projections 204...) Getting over the flange 103, the lid 20 can be removed.

  And in the case of the lid body 20 contracted as described above, the expansion portion 205 may be restored to the original state with the lid body 20 attached to the container body 10. In the packaging container 1 according to the embodiment, since the extended portion 205 is provided in the hanging portion 202, the extended portion 205 is expanded by the action of a force when lifting the lid 20, and the flange portion of the container body 10 is expanded. The hanging portion 202 facing the outer periphery of 103 (encloses the flange portion 103) expands in the circumferential direction.

  That is, the packaging container 1 according to the present embodiment has an outer periphery of the container body 10 (an outer periphery of the flange 103) and a hanging portion 202 of the lid body 20 when a force (lifting force) is applied to the lid body 20. When the abutting force or the abutting force between the flange 103 and the engaging convex portion 204 is larger than the normal lifting (removal) state, the component of the abutting force acts in the circumferential direction of the hanging portion 202. As a result, the extension extending portions 205a and 205b extending outward in the normal state (the state where there is no lifting action on the lid 20) fall down toward the center side of the lid 20.

  Then, as a result of the hanging portion 202 extending in the circumferential direction along with the posture change of the extension portions 205a and 205b for expansion, interference between the outer periphery of the container body 10 (outer periphery of the flange portion 103) and the hanging portion 202 of the lid body 20, The state of interference between the flange 103 and the engaging projections 204 is substantially the same as the appropriate state. Therefore, by continuously lifting the lid 20 upward with the expanded portions 205... Expanded, the engaging convex portions 204... Formed on the hanging portion 202 get over the outer peripheral edge of the flange 103 of the container body 10. become. Thereby, as a result of releasing the engagement of the engaging projections 204 to the flange 103, the packaging container 1 can be opened.

As described above, according to the packaging container 1 according to the present embodiment, the bottomed cylindrical container body 10 and the lid body that is formed by the thermoforming method so as to be able to close the opening 100 of the container body 10. 20, the container body 10 is formed with a flange 103 extending outwardly at the upper end of the peripheral wall 102 that defines the opening 100, while the lid 20 is a lid that faces the opening 100. A main body part 200, an extension part 201 that extends outward from the outer periphery of the lid main body part 200 and can be placed on the flange part 103, and a hanging part 202 that hangs down from the outer periphery of the extension part 201 are formed. Two or more engaging projections 204 projecting inwardly are formed on the hanging portion 202 at intervals in the circumferential direction, and are engaged when the extending portion 201 is disposed on the flange portion 103. The projections 204 ... get over the collar 103 and the engagement projections 204 ... and the collar In the packaging container 1 configured to be engaged with each other, the lid body 20 is provided with at least an expanding portion 205 that can be expanded in the circumferential direction between the engaging convex portions 204 of the hanging portion 202. Therefore, when the cover body 20 is closed with the opening 100 and the lid body 20, the lid body 20 is arranged on the container body 10 so that the extended portion 201 overlaps the flange portion 103. ... over the outer peripheral end of the flange 103, the engaging projection 204 ... and the flange 103 are engaged with each other. Conversely, when the lid 20 is removed from the container body 10 from the lid 20 When the lid 20 is lifted, the engagement convex portions 204 get over the outer peripheral end of the flange portion 103, and the engagement between the engagement convex portions 204 and the flange portion 103 is released.
As a result, the packaging container 1 having the above configuration maintains the hygienic state of the packaged food without allowing the lid 20 to be inadvertently detached from the container body 10 while allowing the lid 20 to be attached and detached. However, food can be packaged.

  The lid 20 is provided with expansion portions 205 that can be expanded in the circumferential direction between at least the engaging projections 204 of the hanging portion 202. The drooping portion 202 can be expanded in the circumferential direction. Thereby, even if the drooping portion 202 of the lid 20 contracts in the circumferential direction after molding, the drooping portion 202 expands (extends) in the circumferential direction due to the expansion of the expansion portion 205. Interference with the drooping portion 202 of the lid 20 is prevented, and the engagement convex portion 204. Therefore, the lid body 20 can be attached to and detached from the container body 10 without being affected by the shrinkage after molding in the lid body 20.

  And since the said extended part 205 ... is formed so that it may bulge outward, the site | part extended outwardly will be formed in the extended part 205 ..., and it will be in the hanging part 202. On the other hand, when a circumferential tensile force acts, a portion extending outwardly falls down in the circumferential direction. As a result, the distance between the engagement convex portions 204 becomes longer, and as a result, the drooping portion 202 is expanded in the circumferential direction, and interference between the flange portion 103 of the container body 10 and the drooping portion 202 of the lid body 20 is prevented. In addition, the engagement protrusions 204...

  Further, the container body 10 has a peripheral wall 102 formed in a square tube shape, the flange 103 is continuously formed over the entire upper end of the peripheral wall 102, and the lid 20 includes at least the peripheral wall 102. Since the engaging convex portions 204 are formed at positions corresponding to the corner portions Ca1, Ca2, Ca3, Ca4, the positioning of the lid body 20 with respect to the container body 10 can be ensured. Moreover, since the extended part 205 ... is formed in the site | part extended straight or substantially straight of the drooping part 202, it can be set as the aspect which is easy to expand in the circumferential direction.

  The packaging container of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

  In the above embodiment, the extended portions 205... Are formed only on the hanging portion 202. However, the present invention is not limited to this. For example, the expanding portions 205. It may be formed so as to straddle the extending part 201, or may be formed so as to straddle the lid main body part 200 and the hanging part 202 via the extending part 201 as shown in FIG. If it does in this way, the site | part (extension part 205a for extension, 205b) extended outward will be formed in the extended part 205 ... in the state straddling the drooping part 202 and the extended part 201. Therefore, the part extended outward by the pulling force acting in the circumferential direction easily falls in the circumferential direction. Thereby, it becomes easy to make the drooping portion 202 expand in the circumferential direction, the interference between the collar portion 103 of the container body 10 and the drooping portion 202 of the lid body 20 is prevented, and the collar portion of the engaging convex portion 204. Overriding 103 is allowed.

  In the above embodiment, the extended portions 205 are formed so that the drooping portion 202 bulges outward, but, for example, a single mountain fold shape in which the extended portions 205 are protruded outward. Alternatively, it may be formed in a continuous shape of mountain folds (continuous of mountain valleys). Even in this case, when a tensile force acts in the circumferential direction, the pair of slopes formed at the ridgeline of the mountain fold shape will fall down, and the drooping portion 202 that has shrunk in the circumferential direction. It can be expanded (peripheral length is increased). Therefore, the same operation and effect as the above embodiment can be achieved.

  Moreover, in the said embodiment, while forming the surrounding wall 102 of the container main body 10 in a square cylinder shape, the cover body 20 is formed corresponding to the shape of the surrounding wall 102, and each corner | angular part Ca1, Ca2, Ca3, Ca4 ( At the four corners), the flange 103 and the engaging convex portions 204 are engaged with each other, and the extended portions 205 are provided between the engaging convex portions 204. However, the present invention is not limited to this. As shown in FIG. 8, when the peripheral wall 102 of the container body 10 is formed in a rectangular tube shape and the lid 20 is formed corresponding to the shape of the peripheral wall 102 as in the above-described embodiment, 204... May be provided between the corners Cb1, Cb2, Cb3, Cb4 in addition to the corners Cb1, Cb2, Cb3, Cb4. Also in this case, it goes without saying that the extended portions 205 are provided between the engaging convex portions 204.

  In the above embodiment, the peripheral wall 102 of the container body 10 is formed in a rectangular tube shape, and the lid 20 is formed corresponding to the shape of the peripheral wall 102. However, the present invention is not limited to this. The peripheral wall 102 may be formed in a substantially true cylindrical shape or a tapered cylindrical shape, and the lid 20 may be formed in a circular shape in plan view corresponding to the shape of the peripheral wall 102. However, the cover body 20 is provided with two or more engaging projections 204 at intervals in the circumferential direction, as well as the extension portion 201 and the drooping portion 202 formed, and each engagement. Of course, the extended portions 205 are provided between the convex portions 204.

  In the above embodiment, the extension portion 205 is configured by a pair of extension extension portions 205a and 205b and an extension connection portion 205c in which the ends of the pair of extension extension portions 205a and 205b are connected to each other. For example, the expansion portions 205 may be formed so as to bulge in an arc shape in the circumferential direction. That is, the outer surface of the extended portion 205 may be formed in a circular arc shape protruding (bulging) outward. Moreover, it is not limited to what provided one extended part 205 ... between the engagement convex parts 204 ..., It is so arranged that two or more extended parts 205 ... are arranged in the circumferential direction between the engagement convex parts 204 .... It may be.

  In the above embodiment, the extended portions 205 are provided between the engaging convex portions 204. However, the present invention is not limited to this, and at least one of the plural engaging convex portions 204. The extension portions 205 may be provided between the two (between the engaging convex portions 204). However, if the extended portions 205 are provided between the single engaging convex portions 204, the amount of the protrusions may be increased, resulting in a design failure. What is necessary is just to determine suitably considering the design of the body 20, etc.

It is a perspective view of the packaging container which concerns on one Embodiment of this invention, Comprising: The state which removed the cover body from the container main body is shown. It is a perspective view of the packaging container which concerns on the same embodiment, Comprising: The state which attached the cover body to the container main body is shown. It is explanatory drawing of the packaging container which concerns on the same embodiment, Comprising: The cross-sectional view of the cover body which represented the container main body with the dashed-two dotted line is shown. It is the fragmentary longitudinal cross-sectional view of the state which attached the cover body to the container main body of the packaging container which concerns on the same embodiment, Comprising: (a) shows the II cross section of FIG. 3, (b) is FIG. II-II cross section is shown. It is explanatory drawing of the packaging container which concerns on the embodiment, Comprising: (a) shows the partial expanded sectional view of one corner | angular part, (b) shows the A section enlarged view of (a), c) shows an enlarged view of part A of (a) in a state where the extended part is expanded. It is a perspective view of the packaging container which concerns on other embodiment of this invention, Comprising: The state which attached the cover body to the container main body is shown. It is a perspective view of the packaging container which concerns on another embodiment of this invention, Comprising: The state which attached the cover body to the container main body is shown. It is a perspective view of the packaging container which concerns on another embodiment of this invention, Comprising: The state which attached the cover body to the container main body is shown. It is a perspective view of the conventional packaging container, Comprising: The state which removed the cover body from the container main body is shown. It is a perspective view of the conventional packaging container, Comprising: The state which attached the cover body to the container main body is shown. It is the fragmentary longitudinal cross-section of the state which attached the lid to the container main part of the conventional packaging container, (a) shows the part in which the engagement convex part in the hanging part was formed, and (b) The part other than the site | part in which the engagement convex part in the part was formed is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Packaging container, 10 ... Container body, 20 ... Lid, 100 ... Opening, 101 ... Bottom, 102 ... Peripheral wall, 102a ... First enlarged part, 102b ... Second enlarged part, 103 ... Gutter part, 104 ... 鍔Main body, 105 ... hanging part, 106 ... margin, 200b ... lid wall part, 200 ... lid body part, 200a ... top part, 201 ... extension part, 202 ... hanging part, 204 ... engagement convex part, 205 ... Extension part, 205a, 205b ... Extension part for extension, 206 ... Margin, 207 ... Holding piece, Ca1, Ca2, Ca3, Ca4, Cb1, Cb2, Cb3, Cb4 ... Corner part

Claims (4)

  A container body having an opening for containing food at the upper end, and a lid formed by a thermoforming method so as to be able to close the opening. The container body has a bottom portion and an outer periphery of the bottom portion. A peripheral wall standing up from and defining the opening, and a flange extending outward from an upper end of the peripheral wall, the lid body having a lid body portion facing the opening, and an outer periphery of the lid body portion An extending portion that extends outward from the outer portion and can be placed on the flange portion, and a hanging portion that hangs down from the outer periphery of the extending portion. Two or more parts are formed at intervals in the circumferential direction, and when the extending part is disposed on the collar part, the engagement convex part gets over the collar part and the engagement convex part and the collar part are mutually connected. In the packaging container configured to be engaged, the lid body has a circumferential direction between at least one of the engaging convex portions in the hanging portion. Packaging containers, characterized in that the expandable extension portion is provided.   The packaging container according to claim 1, wherein the extension portion is formed to bulge outward.   The packaging container according to claim 1, wherein the extension part is formed so as to straddle at least the hanging part and the extension part.   In the container body, the peripheral wall is formed in a rectangular tube shape, the flange is continuously formed over the entire upper end of the peripheral wall, and the lid body corresponds to at least each corner of the peripheral wall. The packaging container according to claim 1, wherein an engaging convex portion is formed on the packaging container.

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