JP2011126572A - Lid material for packaging food and vessel for packaging food - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid material which is closed and opened repeatedly, is easily sealed since the lid material has a shape-retaining function, restoration and the like, and is operated with a single hand, and to provide a packaging vessel including the lid material and having a self-standing property. <P>SOLUTION: The lid material for packaging the food has an adhesion part 11 for adhering to the outer circumferential margin of an opening of a food preservation vessel, and recesses 12a and 12b at least in part, each being recessed from the adhesion surface of the adhesion part 11 in the direction to the inside of the food preservation vessel. A three-dimensional shape is formed at least in the opening area by the adhesion part and the recesses 12a and 12b. An uneven structure having one or two or more protrusions 13 is formed on the recesses 12a and 12b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a food packaging lid that seals or closes the upper opening of a cup-shaped or bowl-shaped container used for packaging food, and a food packaging container including the same.

  In recent years, processed foods have also diversified. In addition to foods used for staple foods such as cup noodles, foods that are used as so-called side dishes such as boiled, boiled and pickled vegetables, salt kelp, sprinkles, etc. Various forms of food such as dried foods are processed, packaged and distributed in the market. For the packaging of these foods, except for the cup noodles and the like, food packaging bags are used, most of which are formed of a bag-like soft resin.

  Such a food packaging bag has high confidentiality, water resistance, strength, and the like, and is suitable for transporting the processed food. However, generally used food packaging bags are usually flat-bag type, except for special ones, they do not have a reseal function and are not self-supporting. For this reason, when a consumer purchases and uses processed food, it is necessary to transfer it to another container, except when the entire bag is used up.

  In addition, the dry matter is often used during cooking, and it is troublesome to take out a small amount from the bag each time it is cooked. In addition, during cooking, for example, it is necessary to add other ingredients or seasonings while stirring the ingredients in the cooking utensils, and the ingredients can be easily removed with one hand. It is very convenient if you can. In addition, some sprinkles have a zipper on the packaging bag, but since it is mainly used for dining tables, bags that are not self-supporting occupy a large place for storage and the contents spill out when placed in an open state. To do. For this reason, a troublesome work of opening and closing the zipper is required every time it is used. Therefore, it is convenient to have a packaging container that is self-supporting and can be easily opened and closed with one hand.

  On the other hand, containers such as instant noodles that are poured by pouring hot water require independence in nature. For this reason, food is stored in a container such as noodles in a cup-shaped or bowl-shaped container, and the upper opening of the container is sealed with a film-shaped lid member. However, the lid member is merely intended for sealing food during transportation and is not provided with a function of performing a plurality of opening / closing operations. For this reason, a film-like member such as a laminated sheet of a paper layer and an aluminum foil layer is usually used as the material, and it does not have a shape-retaining function necessary as a lid. This is because hot water is poured into a cup-shaped container so as to function as a lid only while the noodles can be cooked, and when noodles for food are prepared, they are removed later.

  In use, when the lid is used for sealing again after pouring hot water into the container, the tongue-shaped convex part formed at the end of the lid that has been opened about half is used as a flange-shaped container. Fold it against the edge and fix it so that it hooks on the lower end of this edge. However, since the bottom surface of the lid member is heated by the heat of hot water or exposed to steam, it expands and warps, and anyone can experience the phenomenon that the fixed portion is easily detached and the lid is opened.

  As described above, there has been almost no investigation of conventional food packaging containers that have a self-standing property and that can be opened and closed many times and have a shape-holding function.

  Japanese Patent Application Laid-Open No. 2007-331807 discloses a lid with a reseal function that has excellent food hygiene, good easy-openability, and has resealability only by pressure and pressure bonding with hands and fingers, and can be resealed using the same The surface resin layer (A), the adhesive resin layer (B), the release resin layer (C), and the heat seal resin layer (D) are (A) / (B) / (C ) / (D) using a multilayer film laminated in the order, wherein the adhesive resin layer (B) is composed mainly of a styrene-based thermoplastic elastomer and a tackifier, and the heat seal When the resin layer (D) is heat-sealed at the heat-sealed portion of the object to be sealed, and then the lid material is peeled from the heat-sealed portion, the adhesive resin layer (B) and the release resin are removed at the heat-sealed portion. Layer (C) is delaminated, and Chakujushi layer (B) has been described resealed function lid, characterized in that the exposed resealable state the peeling resin layer and (C).

  Further, in the same document, when re-sealing, the cover material 1 that has been peeled is placed on the bottom material 2, and the surface resin layer 3 is pressure-pressed with hands or fingers to expose the adhesive resin layer 4 of the cover material 1. It is described that the cover material 1 and the bottom material 2 can be resealed by overlapping the portion 11 and the exposed portion 12 of the release resin layer 5 of the cover material 1 that has moved to the bottom material 2. However, since the lid material described in this document reseals due to the adhesive force of the adhesive resin layer, if the adhesive force of the adhesive resin layer deteriorates due to adhesion or deterioration of dust, the sealing ability is reduced. . Further, since the lid itself does not have a shape maintaining function, it is difficult to easily open and close with one hand.

  Japanese Patent Application Laid-Open No. 2007-106462 discloses a cup-shaped food packaging lid made of a laminate that does not contain an aluminum foil, and it is possible to inspect foreign matter and the like of contents with a metal detector. For the purpose of providing a cup-type food packaging lid having excellent holdability, a vapor-deposited thin film made of a metal oxide on one surface of a biaxially stretched polyester film layer having a longitudinal and lateral tensile breaking strength of 140 MPa or less A cup-type food packaging lid is described which has a layer and a paper layer on the other side. Dead hold is a function that maintains a half-open state when a cup-type food lid is opened, and a function that can be re-sealed and folded and fixed to the flange. The former holds contents (soup bags, shiny bags, etc.) It is easy to take out and can easily pour hot water, and the latter is also referred to as a property that makes it easy to steam food after pouring hot water.

  However, the cover material of this document is also configured to have a metal oxide vapor-deposited thin film layer on one side of the biaxially stretched polyester film layer and a paper layer on the other side, so that it has some dead hold properties It is inferior to the holding function, cannot withstand a plurality of opening / closing operations, and is difficult to operate with one hand.

  Japanese Patent Laid-Open No. 2001-213469 discloses an airtight container for packaging foods and the like and a lid used for the airtight container by sealing the opening on the upper surface of the container body with a sealing material and maintaining the airtight state. With regard to the improvement, for the purpose of providing a sealed container that can be applied to a packaged food such as food that needs to be sealed, can be repeatedly opened and closed, and can also be used for storage, and its lid In the sealed container composed of the container body 1 having the opening 2 on the upper surface and the lid member 6 for closing the opening 2 of the container body 1, the lid member 6 covers the opening 2 of the container body 1. And a sealing material 7 that can be sealed to the sealing portion 3 at the periphery of the opening 2, and is attached to the end of the sealing material 7 and can be attached to the outside of the sealing portion 3 of the container body 1. The lid 8 and Closed container and its lid is disclosed.

  However, in the configuration of this document, a lid 8 made of a synthetic resin such as polypropylene must be disposed at the end of the film-like sealing material 7, and the configuration is complicated and the cost increases.

  Japanese Patent Laid-Open No. 2003-292000 discloses a container provided with a plurality of protrusions on the back surface of the lid. The protrusions are caught by contents such as noodles, and the container is tilted at the time of hot water treatment. However, it is intended to prevent the contents such as noodles from flowing out from the hot water cut opening and blocking the hot water cut opening, and does not improve the strength of the lid.

JP 2007-331807 A JP 2007-106462 A JP 2001-213469 A JP 2003-292000 A

  The problem to be solved is to provide a lid that can be opened and closed many times, has shape retention function, resilience, etc., can be easily resealed, and can be operated with one hand, Furthermore, it is providing the packaging container which has the said cover material and has self-supporting property.

The present invention has the following configuration in order to solve the above problems.
(1) an adhesive portion for adhering to the outer peripheral edge of the food storage container opening;
Having at least part of a recess recessed in the direction of food storage container from the adhesive surface of the adhesive part,
A three-dimensional shape is formed by the adhesive portion and the concave portion at least in the opening region,
The lid for food packaging which has one or two or more convex-shaped parts in the said recessed part, and forms the uneven structure.
(2) The food packaging lid material according to (1), wherein the convex portion is a gentle mountain shape and forms a wavy uneven structure.
(3) The food packaging according to (1) or (2), wherein a reinforcing convex portion is formed by a convex portion formed so as to connect the convex portions in a direction perpendicular to the convex portion. Cover material.
(4) The food packaging lid material according to the above (1), which has a concave portion formed near the central portion of the lid material and convex portions formed on both sides thereof, and the concave portion functions as a margin for opening. (5) The food packaging lid material according to any one of the above (1) to (4), which has a folded portion that hangs downward from the edge portion of the adhesive portion. (6) Projected horizontally from the edge portion of the adhesive portion. The food packaging lid material according to any one of the above (1) to (5) having a finger hook portion (7) The food packaging lid material (8) having a protrusion that engages with a collar on the finger hook portion (8) ) The lid for food packaging according to any one of the above (1) to (7), wherein the adhesive part is adhered or fused to the collar of the container opening (9) A sheet-like material having at least a material capable of thermal fusion The food packaging lid material according to any one of the above (1) to (8), which is formed by molding a material (10) above (1) Containers for food packaging with either of the lid (9)

  The lid for food packaging of the present invention can be opened and closed many times, and can be easily sealed because it has a shape retention function, resilience and the like, and can be easily operated with one hand. In addition, the food packaging container having such a lid material has the advantages that it is self-supporting, easy to handle, and requires only a small area for placement.

FIG. 1 is an external perspective view showing a first embodiment of a food packaging lid according to the present invention. Example 1 FIG. 2 is a plan view showing a first embodiment of the food packaging lid of the present invention. Example 1 FIG. 3 is a side view showing a first embodiment of the food packaging lid of the present invention. Example 1 FIG. 4 is a front view showing an embodiment of a container in which the food packaging lid material of the present invention is used. Example 1 FIG. 5 is a plan view showing an embodiment of a container in which the food packaging lid material of the present invention is used. Example 1 FIG. 6 is an external perspective view showing a second embodiment of the food packaging lid of the present invention. (Example 2) FIG. 7 is an external perspective view showing a third embodiment of the food packaging lid of the present invention. Example 3 FIG. 8 is an external perspective view showing a fourth embodiment of the food packaging lid of the present invention. (Example 4) FIG. 9 is a plan view showing a fourth embodiment of the food packaging lid material of the present invention. (Example 4) FIG. 10 is a sectional view showing a fourth embodiment of the food packaging lid material of the present invention. (Example 4) FIG. 11 is a sectional view showing a fourth embodiment of the food packaging lid material of the present invention. (Example 4)

  The lid for food packaging of the present invention has a configuration as shown in FIG. 1, for example, and includes an adhesive portion 11 for fixing to the outer peripheral edge of the opening of the food storage container 2, and adhesion of the adhesive portion 11 At least a part of the recesses 12a and 12b that are recessed from the surface toward the inside of the food storage container 2 is formed, and at least in the opening region of the lid member 1, the bonding portion 11 and the recesses 12a and 12b form a three-dimensional shape. . Thus, by having a three-dimensional shape formed by the adhesive portion 11 and the recesses 12a and 12b in the opening area of the lid material, the shape retention function and the restoration function of the lid material at the time of opening are ensured, and the container by the recesses The mating function with the main body provides excellent sealing performance and enables repeated use.

  The lid for food packaging of the present invention preferably seals the opening of a cup-shaped or bowl-shaped food packaging container. Various foods are stored in the food packaging container. The sealing is achieved by fixing the adhesive portion of the lid material to the outer peripheral edge portion of the food storage container opening. For this fixing, an existing lid member fixing or fixing means such as adhesion or fusion can be used. Among these, fusion is preferable in that the influence of chemical components on food is small and fixing or fixing work is easy. The adhesive portion is usually an opening at the upper end of the food packaging container, and is usually fixed to a portion where a flange-like collar is formed. Therefore, the adhesion portion refers to a portion facing this collar.

  The lid for food packaging has at least part of a concave portion that is recessed from the bonding surface of the bonding portion toward the inside of the food storage container. And the solid shape is formed by the said adhesion part and the recessed part at least in the opening area | region of a cover material. By forming a three-dimensional structure with the concave portion and the adhesive portion, the apparent thickness of the lid material can be increased, and the strength in the thickness direction of the lid material can be increased. Thereby, the strength at the time of opening and closing the lid is increased, a necessary shape holding function and a restoring function can be obtained, and the sealed state can be maintained with good reproducibility. In addition, it can be easily handled with one hand. In addition, the lid | cover material of this invention does not necessarily need to be able to seal at the time of resealing, and the thing of the grade which seals may be sufficient.

  The concave portion is formed in at least a partial region of the lid member. The size of the recess is preferably 20% or more, more preferably 30% or more, particularly 50% or more in the projected area onto the plane of the shape when the lid member is sealed. Further, in the case of a structure in which at least a part of the lid is opened, the projected area of the lid corresponding to the opening is preferably 30%, more preferably 40% or more.

  In addition, the depth of the recess is not particularly limited, and may be a depth that can exhibit the necessary strength and function without impairing the function as the lid. Specifically, it is about 1 to 10 mm, preferably about 3 to 5 mm. The depth of the concave portion may not be constant, and a part thereof may be constituted by an inclined surface. The depth in this case represents the maximum depth.

  Moreover, the said recessed part may be divided and formed in the some recessed part. By dividing into a plurality of recesses, the strength is further increased, and the opening of the lid, that is, the size of the opening and the degree of opening can be adjusted. In this case, the preferable area of the recess is a sum of the areas of the plurality of recesses. In the case where a plurality of concave portions are provided, it is preferable to form the concavo-convex structure by providing one or two or more convex portions in the large concave portion. Moreover, the said convex-shaped part is good to form so that it may straddle between opening edge parts in parallel with the folding line at the time of opening a lid | cover. In this case, when the upper surface of the end portion of the convex portion is in the same position as the upper surface of the bonding portion as it is, bending at this portion is facilitated. Then, by adjusting the position, size, and number of the convex portions, it is possible to adjust the opening position, the opening shape, the opening degree, the degree of bending when opened, and the like. Therefore, the plurality of recesses may be formed in a groove shape between the adhesive portions.

  The convex portion may have a square cross-sectional shape, but may have a sinusoidal cross-sectional shape that draws a gentle curve. In this case, the concavo-convex structure may be a wavy structure. In general, as the number of convex portions increases, the rigidity of the lid member increases. However, as described above, the characteristic that the folding is facilitated also occurs. For this reason, in order to prevent bending, it is made into the shape where the upper surface of a convex part and an adhesion part does not continue, or each convex part is connected in the direction which intersects or goes perpendicular to a convex part. A reinforcing convex portion may be provided. The size and number of the reinforcing protrusions, the number and positions of the protruding protrusions to be connected, and the like are arbitrary, and may be appropriate if necessary.

  The recess preferably has a side portion that is recessed so as to hang down to the inside of the container along the inner surface of the food packaging container. In particular, at the tip or central portion of the opening, the outer side surface of the recess and the inner side surface of the container are fitted so as to be in close contact with each other so that resealability can be easily provided. In addition, the resealability can be further improved by forming the fitting shape over 50% or more, preferably 70% or more, particularly over the entire area of the opening. Further, by adopting the above-mentioned fitting shape also in other regions of the lid member, the assembly to the container is easy and strong, and in some cases, the fixing by adhesion or fusion is unnecessary. Moreover, you may form the uneven | corrugated shape for ensuring fitting and engagement to the said recessed part outer surface and the inner surface of a container. For example, a convex portion such as a sphere or a part of a solid obtained by deforming the sphere or a deformed portion may be formed on one, and a concave portion having a shape corresponding to this may be provided on the other.

  The outer edge of the lid material is usually similar to the outer edge of the container collar, since the lid material has a shape conforming to the shape of the container opening, but may be different as necessary. In particular, part or all of the outer edge of the cover member around the opening may be extended to form a finger-hanging portion having a finger-hooking function. This finger hook may be formed at one place or at a plurality of places. Further, the finger-hanging portion may be provided with unevenness that improves finger-hooking properties and has a non-slip function and also functions as a reinforcement.

  Moreover, you may form the skirt-like folding | returning part bent from the outer edge of a lid | cover material along a collar end part, and drooping. By providing such a folded portion, the fitting or engagement with the container is performed more firmly. Moreover, it is also possible to attach to a container, without adhere | attaching and melt | fusioning. Furthermore, the convex part and hook which protruded inside are formed in the said folding | turning part in an opening part, and it can be made to seal more reliably by engaging with a collar. The length of the hanging portion of the folded portion is not particularly limited, but if it is too long, the fitting operation may be hindered, the appearance may be impaired, or the use may be hindered. Usually, the thickness is not less than 20 mm and preferably not more than 3 to 10 mm. Further, the tip of the folded portion may be folded slightly toward the inside.

  Although various sheet materials used for food packaging can be used for the lid material of the present invention, a sheet material that can be heat-sealed is particularly suitable. Examples of such a material excellent in heat-fusibility include polyolefin resins such as polyethylene terephthalate (PET), polyethylene (PE), and polypropylene (PP). In addition, a sheet material in which an ethylene copolymer resin such as an ethylene / vinyl acetate copolymer (EVA), an ethylene / acrylic acid copolymer (EAA), or an ethylene / methacrylic acid copolymer (EMAA) is laminated may be used. it can.

  In some cases, a hot melt adhesive may be provided on the base sheet. As a base material sheet (44), comparatively thin sheets, such as a polyethylene terephthalate (PET), polyethylene (PE), a polypropylene (PP), are mentioned, for example, It can select suitably according to a size, the content, etc. These substrate sheets may be used as a laminate in combination with the above heat-sealing material.

  Furthermore, a paper layer such as double art paper, single art paper, double-sided coated paper, single-sided coated paper, or synthetic paper, an aluminum staying layer, or the like can be added as necessary.

  The thickness of the lid material is not particularly limited as long as it is a thickness of a sheet material that is usually used, but is usually about 0.1 to 0.5 mm per one sheet layer.

  The food packaging container of the present invention is composed of a synthetic resin injection molded article, a thermoformed article from a synthetic resin sheet, a synthetic resin foam molded article, etc., and a synthetic resin injection molded article is particularly preferable. The shape is not particularly limited, and an optimum shape is selected depending on the shape, size, characteristics, usage mode, and the like of the food to be stored. In general, a cylindrical shape with a bottom, a prismatic shape, a truncated cone shape, a truncated pyramid shape, or a cup shape or bowl shape with an opening at the top is preferable. Further, the diameter may be increased upward, that is, the cross-sectional area may be increased.

  At the upper end of the container-side body portion, a flange-like collar is formed that projects outward, that is, in the outer peripheral direction. An adhesive portion of the lid member is fixed to the upper surface of the collar by a fixing means such as adhesion or heat fusion.

  The container can be manufactured by known materials and means. For example, it can be produced by a well-known injection molding using a resin such as polyethylene, polypropylene, polyethylene terephthalate, and polystyrene. In addition, a so-called vacuum forming method or the like can be used in which a soft packaging material sheet mainly composed of polypropylene, polyethylene terephthalate, polystyrene, or the like is heated and softened, and this is vacuum-suctioned from the cavity side and molded into a deep drawing mold.

  Although it does not specifically limit as a magnitude | size of a container, In a container with a circular opening part normally, it is about 30 (phi) -150 (phi) by an outer diameter. In addition, the said outer diameter is synonymous with the diameter display conventionally used in the said technical field. The height from the bottom to the opening end is about 20 to 200 mm. The color of the container may be transparent or opaque, or may be variously colored or patterned. If it is transparent, there is an advantage that the ingredients inside can be confirmed and the remaining amount can be easily understood.

  Next, an Example is shown and this invention is demonstrated more concretely. 1 to 3 show a first embodiment of the present invention. FIG. 1 is an external perspective view of the lid and container of the present invention, FIG. 2 is a plan view of the lid, and FIG. It is a side view. In the figure, the lid member 1 of the present invention has an adhesive portion 11 formed on the outer peripheral edge portion and concave portions 12 a and 12 b recessed in the inner direction of the container 2. The upper direction in FIG. 2 is the front part, and the lower direction is the rear part. A portion corresponding to the front portion from approximately the center of the lid member corresponds to the opening. In this example, the food packaging container 2 has a so-called cup shape with a bottomed cylindrical shape that slightly increases in diameter toward the opening. Accordingly, the opening is circular, and the lid member 1 is also shaped accordingly.

  The recesses 12a and 12b of the lid member 1 have a front recess 12a corresponding to the opening and a rear recess 12b. In addition, a concavo-convex structure composed of the convex portion 13 and the groove-like concave portion 12c is formed in a region slightly near the front concave portion between the front concave portion 12a and the rear concave portion 12b. In the illustrated example, there are three convex portions 13, which are formed in a band shape between the edges so as to communicate the adhesive portion 11, and a concave portion 12 c having a predetermined depth is formed therebetween. The convex portion 13 is formed with a reinforcing convex portion 14 in a direction perpendicular to the convex portion 13 so as to connect the convex portions in the vicinity of the central portion thereof.

  Each recessed part 12a, 12b, 12c has a side part 15 that is recessed so as to hang down from the adhesive part 11 facing the container opening collar to the container inner side along the container inner surface. Since the side portion 15 is formed at a position in contact with the inner side surface of the container, the outer side of the side portion 15 and the inner side surface of the container are fitted to have a function of fixing the lid member. In addition, a three-dimensional structure is formed by the adhesive portion 11 and the recesses 12a, 12b, and 12c, the lid member can have rigidity, and is strong against external forces such as bending and deformation.

  The concavo-convex structure composed of the plurality of convex portions 13 and the concave portions 12c has a function of adjusting the opening degree of the lid material by determining the opening position in addition to the function of increasing the strength and rigidity of the lid material. For this reason, the concavo-convex structure is preferably formed with a band-like or ridge-like concavo-convex shape in parallel with a folding margin when the lid is opened and closed. Further, when the lid is opened by an external force, it has a function of generating a reaction force and elasticity for energizing in the restoring direction to give a reaction force and automatically returning and resealing when the external force is lost. Moreover, the reinforcement convex part 14 has the function to give the intensity | strength which opposes the deformation | transformation which arises in the case of such opening and closing, and to improve the intensity | strength of the cover material 1 whole. Accordingly, the force, opening degree, and degree of deformation required for opening and closing the lid member can be easily adjusted by adjusting the shape and size of the concavo-convex structure and the reinforcing convex portion 14. As shown in FIG. 3, the concave portion 12c is shallower than the other concave portions 12a and 12b. This is because the concave portion 12c is located between the convex portions 13, and mainly the lid opening / closing adjustment. This is because it has a function.

  Although the edge part which is the adhesion part 11 of the lid | cover material 1 is formed along the outer diameter of the container 2, it protruded so that it might extend in the surface direction from the adhesion part 11 in the front part of the opening part of the lid | cover material 1. A finger hook 16 is formed. The finger hooks 16 are provided so as to protrude in two places in the illustrated example, and the shape thereof is approximated to a part of a square inscribed in the circle of the container opening. That is, the square corners correspond to the finger hooks 16. In addition, the corner | angular edge part is rounded like the example of illustration. A plurality of recesses 17 (two in the illustrated example) are formed on the finger-hanging portion 16 for the purpose of preventing slipping, improving finger-hooking properties, and improving strength. Furthermore, you may form the recessed part or convex part for reinforcement. In this way, by forming the finger-hanging portions 16 protruding in two places, it can be opened and closed with either finger even when it is held with either left or right hand, and can be easily used with one hand.

  The preferable example of the container for food packaging combined with the above lid | cover materials is shown to FIG. 4 is a side view showing a specific example of a food packaging container, and FIG. 5 is a plan view of FIG. In FIGS. 4 and 5, the food packaging container 2 has a bottomed cylindrical shape, and the side body portion 24 is enlarged from the bottom portion 22 toward the opening portion 25. In the opening portion 25, a flange-shaped collar 21 is formed at the upper end portion of the side portion 24. Adhered portion 11 of the lid 1 is fixed to the collar 21.

  The container bottom portion 22 may be formed continuously from the lower end of the side portion 24, but in this example, it is formed so as to be positioned slightly above the lower end of the side portion 24, and downward from the formation position of the bottom portion 22. A so-called yarn thread 23 is formed by the extending side portion 24. Further, a thick portion 24a that is slightly raised is formed in the lower portion of the inner surface of the side body portion 24 and above the position where the bottom portion is formed. For this reason, as shown in the illustrated example, when the containers are stacked, the lower end of the thread thread 23 is locked by the thick portion 24a, and the inner peripheral surface of the stacked outer container and the inner periphery of the inner container The surface meshes with each other so that it is not difficult to remove it. If necessary, the side body 24 is provided with a pattern or color using dry offset printing, in-mold labeling, shrink film, or the like.

  At the time of enclosing food, the lid 1 is attached to the container 2, and the adhesive portion 11 of the lid 1 is adhered or fused to the upper surface of the brim 21 of the container. In use, the finger-hanging portion 16 and the like are picked up and a part of the bonded portion bonded or fused is peeled off. In the example of illustration, it is made to peel just to the convex-shaped part 13 located in the boundary of the uneven structure 13 and 12c and the rear part recessed part 12b. In this case, a known method for easily peeling off to a predetermined area may be used. Then, if necessary, the finger hook 16 may be operated to open and close the front part of the lid and take out the food from the inside. The lid material of the present invention can be opened and closed even with one hand, so that it is very easy to use, and the workability at the time of use in cooking or eating is improved.

  Next, a second embodiment of the present invention will be described. FIG. 6 is an external perspective view of a lid and a container showing a second embodiment of the present invention. In this example, the lid member 1 does not have a concavo-convex structure of the concave portion 12c and the convex portion, but simply has a large convex portion 13a. The convex portion 13a is formed in the vicinity of the folding edge, and the upper portion of the convex portion 13a substantially functions as a folding margin. From the front concave portion to the convex portion 13a, a gentle slope is drawn so as to become shallow, and from the convex portion 13a to the rear portion 12b, the slope is somewhat steep to the same extent as in the first embodiment. It is formed to be connected by an inclination. Other configurations are the same as those in the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  Next, a third embodiment of the present invention will be described. FIG. 7 is an external perspective view of a lid member showing a third embodiment of the present invention. In this example, the lid member 1 has a groove-like recess 12d formed in the center of the lid member and two convex portions 13b formed on both sides of the recess-projection structure. Have. The groove-like recess 12d substantially functions as a fold.

  In addition, a skirt-like folded portion 3 is formed on the outer edge of the bonding portion 11 so as to hang along the end portion of the previous collar over the entire circumference. By this folded portion, the fitting with the container is more firmly performed, and it can be attached to the container without adhesion or fusion. Further, the lower end of the folded portion 3 is folded back to the outside again to form an edge portion 31 protruding slightly outward in the horizontal direction. The edge 31 may be omitted, but is useful for absorbing molding errors and ensuring the strength of the lower end of the folded portion 3. Further, a curved portion 18 is formed on the lower side of the folded portion 3 corresponding to the concave portion 12 such that the folded portion is cut out in a gentle valley shape, and together with the concave portion 12d, the lid member is opened and closed. Making it easy. Other configurations are the same as those in the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  Next, a fourth embodiment of the present invention will be described. 8 to 11 are views showing a fourth embodiment of the present invention. FIG. 8 is an external perspective view of a food packaging lid and container, FIG. 9 is a plan view of the lid, and FIG. 10 is a lid. 9 is a cross-sectional view taken along the line AA ′ in FIG. 9 showing the closed state, and FIG. 11 is a cross-sectional view taken along the line AA ′ in FIG.

  In this example, it has the uneven structure 12e and 13c formed by the recessed part 12e and the convex-shaped part 13c from the center of the cover material 1 to the opening part side of the front part. Each convex portion 13c is formed so as to be parallel to the folding line as in the above embodiments, and the apex portion is formed in a thin strip shape. The top surface of the convex portion 13c is connected to the bottom surface of the concave portion 12e by a side surface having an angle close to vertical so as to drop sharply. The edge portion 11 of the lid member is substantially the same size as the outer edge of the container collar 21, and the folded portion as in the third embodiment is not formed. The upper surface of the convex portion 13c and the adhesive portion 11 are formed at substantially the same plane position, and the concave portions 12b and 12e are recessed in the container inner direction as in the above embodiments.

  Further, a tongue-shaped finger-hanging portion 16a is formed in the vicinity of the front end of the front portion of the lid 1. A protrusion 16b is formed on the finger-hanging portion 16a at a position slightly outside the collar edge. This protrusion 16b protrudes below the finger-hanging portion 16a and is formed so that its side portion is in contact with the flange side edge. Further, the tip of the protrusion 16b protrudes to the lower side of the collar and has a so-called hook shape. Therefore, it is possible to secure the sealing by hooking the hook of the protrusion 16b to the lower part of the collar 11.

  In use, as shown in FIG. 10, in the state where the adhesive portion 11 is fixed or the lid material 1 is closed, the bottom portions of the recesses 12b and 12e and all the lid materials in the two planes to which the adhesive portion 11 belongs are used. The component is located and functions as a lid having the apparent thickness of the two planes. Next, when the container is opened, the finger hooking portion 16a is pulled, and the front portion of the lid member 1 is opened. Open like a simple curve. When the finger is released, the cover member 1 naturally returns to the original state in an attempt to return to the state shown in FIG. 10 due to the restoring force of the uneven structure. At this time, if the shape of the projection 16b is devised, the hook of the projection 16b can be hooked and engaged with the lower end of the collar 11 without specially applying a special force, and the lid member is fixed by one action. It can be resealed. Even if the hook cannot be fixed naturally, it can be easily fixed by applying a force to engage the hook of the protrusion.

  In each of the above-described embodiments, the specific convex portion and the concave portion, the lid member having a specific shape and the like have been illustrated and described. However, the present invention is not limited to this, and within the scope of the invention described above. Various modifications and applications are possible if there are.

  The lid of the present invention can be used as a lid for various containers, and its use is not particularly limited. For example, instant noodles such as instant noodles, snacks, confectionery such as chocolate confectionery, sliced ham Processed livestock products such as salt kelp, sprinkles and other dry foods, wet tissue, sweat paper, fragrance, disposable diapers, etc. It can be used as a lid for containers that package cosmetics, sanitary products, shipping drugs, first-aid plasters, and throat candy. In particular, it can be suitably used as a package for storing the contents that remain for a relatively long period of time after opening and that are taken out little by little during use.

DESCRIPTION OF SYMBOLS 1 Cover material 2 Container for food packaging 3 Folding part 10 Container 11 Adhesion part 12 Concave part 12a, 12b, 12c, 12d Concave part 13 Convex part 13a, 13b Convex part 14 Reinforcement convex part 15 Concave side part 16 Finger hook part 16b Protrusion 21 Collar 22 Bottom 23 Yarn thread 24 Side trunk 25 Opening

Claims (10)

An adhesive part for adhering to the outer peripheral edge of the food storage container opening;
Having at least part of a recess recessed in the direction of food storage container from the adhesive surface of the adhesive part,
A three-dimensional shape is formed by the adhesive portion and the concave portion at least in the opening region,
The lid for food packaging which has one or two or more convex-shaped parts in the said recessed part, and forms the uneven structure.   The lid for food packaging according to claim 1, wherein the convex portion has a gentle mountain shape and forms a wavy uneven structure.   The lid for food packaging according to claim 1 or 2, wherein a reinforcing convex part is formed by a convex part formed so as to connect the convex parts in a direction perpendicular to the convex part.   The lid for food packaging according to claim 1, further comprising a recess formed near the center of the lid and convex portions formed on both sides thereof, wherein the recess functions as a folding margin when opening.   The lid | cover material for food packaging in any one of Claims 1-4 which has the folding | turning part drooping downward from the edge part of the said adhesion part.   The lid for food packaging according to any one of claims 1 to 5, further comprising a finger-hanging portion projecting horizontally from an edge portion of the adhesive portion.   The lid for food packaging according to claim 6, wherein the finger hook has a protrusion that engages with a collar.   The lid for food packaging according to any one of claims 1 to 7, wherein the adhesive portion is bonded or fused to the collar of the container opening.   The lid for food packaging according to any one of claims 1 to 8, which is formed by molding a sheet-like material having at least a material capable of heat-sealing.   A food packaging container having the lid according to any one of claims 1 to 9.

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