JP2011057225A - Packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container configured so that sealability is, needless to say, excellent, a lid is easy to open, and re-sealability is also excellent. <P>SOLUTION: The packaging container includes a container body 1 and the lid 2 such that a rectangular annular projection flange 10 is formed along the side portion 8 in the peripheral edge 11 of a container body 1 that has a bottom 3, a drop-in step 12 is formed along the projecting flange 10 in the internal circumference and also a receiving flange 14 which fits to the projecting flange 10, is formed along the lid part 4 in the peripheral edge 13 of the lid 2, and a drop-in projection 15, which fits to the drop-in step 12, is formed along the receiving flange 14 in the internal circumference. In the packaging container, the internal walls 16 of at least three of the corners 12a, 12b, 12c, and 12d of the drop-in step 12 of the container body 1 and the external walls 18 of the three corners 15b, 15c, and 15d of the drop-in projection 15 of the lid 2 have fitting portions 17a, 17b, 17c, and 17d and fitting portions 19b, 19c, and 19d, which engage with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a packaging container for containing food such as simmered kelp in a sealed state, and more particularly to a packaging container having a relatively shallow box shape formed by molding and molding a synthetic resin sheet. .

  Conventionally, there are various types of packaging containers that contain food such as chopped kelp boiled in a hermetically sealed state. These packaging containers have a rectangular protruding flange formed on the periphery of the side surface of the container body, and a rectangular receiving flange that fits the protruding flange is formed on the periphery of the lid of the lid. It has a structure.

  However, in the case of a packaging container having a structure in which the receiving flange of the lid is simply fitted and sealed to the protruding flange of the container body, the strength of the container body and the lid is generally sufficient depending on the use state. If the lid is opened carelessly, the peripheral edges of the container main body and the lid, in particular, the four corners of the projection flange of the container main body and the inner periphery of the receiving flange of the lid, or each flange portion, can be easily deformed and repeatedly opened and closed. In some cases, the resealability is not lost even if it is performed.

  In particular, in this type of container, a thermoplastic or thermosetting adhesive layer is interposed between the protruding flange of the container body and the receiving flange of the lid for the purpose of ensuring the quality retention period of the contents such as boiled rice. Most of them are sealed so that they can be opened by heat welding. Therefore, the problem that the lid is difficult to open, is easily deformed when opened, and lacks resealability is more significant.

  Therefore, for example, as shown in Japanese Patent Application Laid-Open No. 2008-260560, fittings for forming hooks that are removably engaged with the stepped portion and the fitting portion of the lid at the four corners of the container body. An excellent sealing effect and resealability can be expected by forming the mating convex portion and the fitting concave portion.

JP 2008-260560 A

  However, since the packaging container is mainly hermetic, it is excellent in hermeticity. However, it is difficult to open the lid, and further, there is a problem that the lid is difficult to reclose.

  A rectangular annular projecting flange is formed on the periphery of the side surface of the container body having a bottom, a drop step is formed on the inner periphery of the projecting flange, and the projecting flange is fitted to the periphery of the lid of the lid. In a packaging container formed of a container body having a rectangular shape and a lid, each of which is formed with a receiving flange, and a drop protrusion is formed on the inner periphery of the receiving flange to be fitted to the drop step part. Fitting portions that engage with each other are formed on the inner wall at at least three corners of the dropping step portion and the outer wall at the three corners of the dropping projection in the lid body, respectively.

  Moreover, in this invention, it is preferable in the cross section of the said fitting part being circular arc shape.

  According to the packaging container of the present invention, it is needless to say that the sealing property is excellent, and the lid body can be easily opened, and the resealability is also excellent.

The disassembled perspective view of the packaging container of the state which opened the cover which concerns on one embodiment of this invention. The AA expanded sectional view of the state (not shown) which closed the lid in the embodiment shown in FIG. The top view which shows a container main body. The top view which shows a cover body.

  Hereinafter, embodiments of the present invention shown in the drawings will be described.

  1 is an exploded perspective view of a packaging container in a state in which a lid according to an embodiment of the present invention is opened, and FIG. 2 is an AA enlarged sectional view in a state in which the lid is closed (not shown). FIG. 3 is a plan view of the container body, and FIG. 4 is a plan view of the lid.

  The packaging container of this embodiment includes a container body 1 having a bottom 3 and a lid 2 that seals the container body 1. The container body 1 and the lid body 2 are made of, for example, a transparent synthetic resin sheet such as vinyl chloride, polyethylene, or polyethylene terephthalate. The container body 1 is a rectangular (especially square in this embodiment) container whose bottom 3 is the narrowest and gradually expands upward, and the lid 2 has a flat, wide plate-like lid 4. It has a rectangular shape (square).

  Further, the bottom 3 of the container body 1 has a rectangular flat portion 5 at the center, and a pyramid-shaped pyramid-shaped projection 6 is arranged in a plurality of patterns on the outer periphery of the flat portion 5. A diamond-shaped projection 7 cut into a diamond shape is disposed on the outer periphery of the shape projection 6 and serves as a stopper to prevent the contents from moving.

  That is, the contents stored in the container main body 1 are prevented from shifting during transportation or the like, and remain in the center of the container main body 1. Also, when the contents are taken out using chopsticks or the like, a gap is formed between the contents and the bottom surface by the cone-shaped protrusions 6 and the diamond-shaped protrusions 7, so that they do not stick to the bottom surface of the container, The contents that can be easily taken out and have not yet been eaten can be collected and resealed in the center of the container body 1 and stored airtight.

  Moreover, the vertical rib 9 is arrange | positioned at the side part 8 of the container main body 1 at the vertical grid | lattice form, and has strengthened the side. A protruding flange 10 protruding in a rectangular ring shape is formed on the peripheral edge 11 of the side surface portion 8, and a falling stepped portion 12 is formed on the inner periphery of the protruding flange 10.

  On the other hand, the lid body 2 is formed with a receiving flange 14 that is fitted to the protruding flange 10 at the peripheral edge 13 of the lid portion 4. On the inner periphery of the receiving flange 14, a lowered projection 15 is formed that fits into the depression step 12. By fitting the projection flange 10 and the receiving flange 14, the container body 1 and the lid 2 are hermetically sealed, and by fitting the drop step 12 and the drop projection 15, higher air tightness is obtained.

  In this embodiment, in particular, the four corners 12a, 12b, 12c, and 12d of the inner wall 16 of the drop-in step portion 12 of the container body 1 have arcuate cross-sections, and convex portions having arcuate fitting portions 17a and 17b. , 17c, 17d are formed, and the three corners 15b, 15c, 15d of the outer wall 18 of the drop projection 15 of the lid 2 are engaged with the fitting portions 17b, 17c, 17d in a concave-convex manner. Are respectively formed with arcuate fitting portions 19b, 19c, 19d.

  In the present embodiment having the above configuration, when the container main body 1 is sealed with the lid body 2, the fitting portions 17 b provided at the three corners 12 b, 12 c, 12 d of the inner wall 16 in the dropping step portion 12 of the container main body 1. , 17c, 17d are respectively fitted and engaged with fitting portions 19b, 19c, 19d provided at the three corners 15b, 15c, 15d of the inner wall 16 of the drop projection 15 of the lid body 2, respectively. The strength of the three corners 12b, 12c, 12d of the drop step 12 in the main body 1 and the strength of the three corners 15b, 15c, 15d of the drop projection 15 in the lid 2 are enhanced, and the fitting strength is increased to improve the airtightness of the packaging container. Enhanced.

  When this packaging container is used, after the contents such as food are stored in the container body 1 and filled with an inert gas (nitrogen gas), the protruding flange 10 of the container body 1 or the receiving flange 14 of the lid 2 is previously stored. The container body 1 and the lid body 2 are sealed by thermocompression bonding or the like using an adhesive sheet made of a thermoplastic adhesive or a thermosetting adhesive applied to at least one of the above. By doing so, not only can the contents be stored for a long period of time, but the strength of the container body 1 and the lid body 2 itself is enhanced, and the resealability and the unsealing property are improved.

  Then, in order to open the sealed embodiment, like the conventional broadcasting container of this type, the fitting portions 17b, 17c, The portion of the corner 15a where the 17d is not formed is defined as an "opening", and the flange 11 of the container body 1 positioned below the portion is opened by gripping with fingers of different hands and opening. Unlike the other three corners 15b, 15c, 15d, the corner 15a portion of the drop projection 15 of the lid 2 is not in a fitted state with the container body 1 and is like a conventional packaging container in which the four corners are in a fitted state. It does not release the peripheral edge 13 of the lid 2 toward the fitting direction, and there is no resistance in the opening direction, so the lid 2 can be opened very easily and quickly.

  In particular, when the lid 2 is opened, the fitting state is released sequentially from the corner 15a to the corners 15b, 15d, and further to 15c, but the corners 15b, 15d are transverse to the fitting direction. Therefore, the corner 15c is released from the direction opposite to the fitting direction, and the fitting state is very easily released without resistance.

  Further, when the lid is returned to its original state and resealed, it can be performed very easily by fitting from the corner 15c, contrary to the case of opening.

  In the present embodiment, the fitting portions 17b, 17c, 17d and the fitting portions 19b, 19c, 19d have an arcuate cross section so that the mating and unmating is performed more smoothly and firmly. Furthermore, since the flat surface of the fitting portion is formed in an arcuate shape, the operation is smooth and the engagement is reliable.

  Further, in the present embodiment, the opening portion (portion where the fitting portion is not provided) of the peripheral edge 13 of the lid body 2 is marked with a mark such as “opening” (a mark such as ○ is acceptable). When the lid 2 is closed, the container body 1, the lid body 2, and the plane are square in shape so that they can be placed in each corner of the lid body 2. It is not necessary to confirm the directivity, and it is very efficient. For example, when the plane is a rectangle, the container body 1 may be provided with fitting portions at three corners.

  Furthermore, in the present invention, the shapes and methods of the fitting portions 17a, 17b, 17c, 17d, 19b, 19c, and 19d are merely examples, and it goes without saying that other types may be used.

  DESCRIPTION OF SYMBOLS 1 Container body, 2 cover body, 3 bottom part, 4 cover part, 6 cone-shaped protrusion, 7 diamond-shaped protrusion, 8 side surface part, 10 protrusion flange, 11 peripheral edge, 12 drop step part, 12a, 12b, 12c, 12d corner, 13 peripheral edge, 14 receiving flange, 15 drop protrusion, 15b, 15c, 15d corner, 17a, 17b, 17c, 17d, 19b, 19c, 19d fitting part

Claims (2)

  A rectangular annular projecting flange is formed on the periphery of the side surface of the container body having a bottom, a drop step is formed on the inner periphery of the projecting flange, and the projecting flange is fitted to the periphery of the lid of the lid. In a packaging container formed of a container body having a rectangular shape and a lid, each of which is formed with a receiving flange, and a drop protrusion is formed on the inner periphery of the receiving flange to be fitted to the drop step part. A packaging container, wherein fitting portions are formed on the inner wall at at least three corners of the dropping step portion and the outer wall at three corners of the dropping projection portion of the lid, respectively, so as to engage with each other. The packaging container according to claim 1, wherein a cross section of the fitting portion is an arc shape.

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