JP4522695B2 - Packaging container - Google Patents

Description

  The present invention relates to a packaging container that is preferably used mainly for food packaging, and is a type of packaging container in which a lid body is fitted and used. More specifically, the lid opening operation is simple while ensuring sealing performance. The present invention relates to a safe packaging container.

  A variety of food packaging containers have been proposed to be used for over-the-counter sales of various foods and cooked side dishes, but currently the most widely used ones are vacuum molding and pneumatic molding of synthetic resin sheet materials. In this type, a lid is fitted to the container body formed by an appropriate sheet forming method such as hot press molding. In order to protect the stored food and prepared food, such a food packaging container is provided with a ridge with a flange portion on the periphery of the container body, and a ridge with a flange portion on the periphery of the lid body. In general, the lid is covered so that the flange portion of the container body is completely covered by the flange portion of the lid body while fitting the convex stripes of the lid body to the ridges of the lid body.

  However, in a packaging container of the above-mentioned type, it is necessary to release the fitting with the container body while pulling up the flange part of the lid body at the time of opening. Since it was necessary to fit, there was a drawback that the opening operation became difficult.

  In view of this, in this type of food packaging container, there has been proposed a structure that facilitates opening of the lid while preventing leakage of the contents due to reliable fitting. For example, a packaging container with a lid that protrudes at a diagonal position on the peripheral edge of the container body, grips the knob and pulls it outward to eliminate the fitting of the lid (patent document 1) or by forming a reinforcing structure having a substantially triangular cross-section connected to the flange on the outer side of the ridge on the periphery of the lid, the ridge opening expands when the lid flange is lifted upward The packaging container material (Patent Document 2) in which the fitted state is released, or a gap between the flange part at the peripheral part of the container body and the flange part at the peripheral part of the lid body when the cover is closed And a box-shaped container (Patent Document 3) formed so that the lid can be picked by inserting a finger from anywhere on the periphery of the container.

Japanese Patent Laid-Open No. 5-139437 (Claims, FIG. 2) Japanese Patent Laid-Open No. 11-193043 (Claims, FIG. 7) Registered Utility Model No. 3087952 (Utility Model Registration Request, FIG. 3)

  Certainly, according to the packaging container, etc., there was an advantage that a very strong force was not required for the lid opening operation, but there was a really fitted state until the lid body was completely removed when the lid opening operation was performed. There was a difficulty that it was difficult to determine whether or not it was released. In particular, so-called “meal meals” that consume cooked prepared foods purchased at supermarkets at home are increasing, and the demand for this type of packaging container is rapidly expanding. It is desirable to provide a container that can be opened easily and reliably even by a person with weak finger strength, such as a person with a finger, and at the same time easily confirming the completion of opening.

  The present invention has been made in view of the circumstances as described above, and in order to solve the problem, the whole has a substantially square shape in plan view, and the ears have flat surfaces at the four corners excluding the housing recesses. And a lid provided with ears which are configured to be fitted to the container body and have flat surfaces at least at the four corners, and are erected on the peripheral edge of the container body. In a packaging container configured to fit in a ridge standing on the peripheral edge of the lid body, a linear protrusion is provided inwardly on the inside of the peripheral wall surface hanging from the outer edge of the ridge of the lid body, The linear protrusion is engaged with the lower edge of the peripheral wall surface suspended from the outer edge of the ridge of the container body so as to prevent the drop, and the linear protrusion is provided only at the four corners. Container.

  In the packaging container thus formed, the hands are placed on the two diagonal corners and the thumb is placed on the upper surface of the ear portion of the lid body, while the index finger is placed from the lower surface of the ear portion of the container body to the bottom wall surface of the lid body. If you slide it to the edge, the deformed lid will come off with a snapping sound. Then, the lid is completely removed from the container body by operating the remaining two corners in the same manner so as to be sandwiched between the thumb and forefinger and releasing the engagement of the linear protrusions.

  The linear protrusions at the four corners of the lid body extend from the intersection A between the diagonal line connecting the corners and the outer edge of the housing recess of the container body to the point between the two intersections X and Y hanging from the two sides forming the corner. It is good to provide it within the range. Providing linear protrusions in a range that substantially exceeds between X and Y has an advantage that a more reliable engagement state can be maintained. However, there is a drawback that the lid body is difficult to come off even if the lid opening operation is performed.

  The container body is prevented from being easily deformed by the ridges erected on the peripheral edge, but if a plurality of linear reinforcing grooves are provided in the ears, further deformation prevention is achieved. Such a line reinforcing groove is preferably engraved at an appropriate interval in the shape of a concentric outer edge of the housing recess located at the center of the container body.

  Further, the ear portion of the lid is provided with a hollow holding portion that forms a protrusion having a flat surface. The hollow holding part is provided independently on the inner side of the ridges arranged on the outermost periphery of the lid, and when a low step portion is interposed between the ridges, when the index finger is hung The outer edge of the lid body is easily deformed upward, and the engagement of the linear protrusion is easily released.

  In the packaging container according to the present invention, the linear protrusions of the lid and the lower peripheral edge of the peripheral wall surface of the container main body are engaged so that the fitted state of the two is reliably maintained, while the two corners forming the diagonal The lid can be removed simply by pinching each part with the thumb and forefinger, and the completion of the opening operation can be confirmed by a clicking sound each time. Due to the presence of the storage recess, the lid and each ear of the container body are always separated upward from the mounting surface of the table, etc. Therefore, it can be suitably used as a so-called barrier-free packaging container.

  In addition, the linear protrusions at the four corners of the lid are formed between the two intersections X and Y hanging from the intersection A between the diagonal connecting the corners and the outer edge of the container recess of the container main body to the two sides forming the corner. By providing in the range which does not exceed, it can be set as the packaging container which aimed at harmony with reliable engagement maintenance and easy engagement cancellation | release.

  Furthermore, if a plurality of linear reinforcing grooves are provided in the ear portion of the container body, the container body side is less likely to be deformed. Benefits are gained.

  In addition, if a hollow holding part with a flat surface is provided on the ear part of the lid, the position where the thumb is placed can be easily understood when opening the lid, and it can be soft and cushioned when the thumb is pressed. Therefore, the lid opening operation can be performed more smoothly.

  Hereinafter, the packaging container according to the present invention will be described in detail with reference to the drawings. 1 is a front view of a container body in a packaging container according to the present invention, FIG. 2 is a plan view of the container body, FIG. 3 is a bottom view of the container body, and FIG. 4 is an end view taken along line II of the container body. FIG. 5 is an end view taken along line II-II in the container body. The container main body 1 of the example illustrated in these figures is obtained by molding a synthetic resin sheet material, and has a substantially square shape as a whole in plan view. Is provided with an ear 3 having a flat surface.

  The housing recess 2 in this example is formed by dividing a deep dish-like portion having a circular shape in plan view disposed at the center of the container body 1 by a partition wall 4 that forms a cross. In the present invention, any shape of the housing recess 2 can be adopted as long as the ear 3 can be secured at the corner of the container body 1. In order to increase the overall strength of the container main body 1, a concave groove 21 is provided on the outer periphery of the housing concave portion 2, and a ridge 5 is provided upright on the peripheral edge of the container main body 1. As will be described later, the ridges 5 are fitted into the ridges 9 of the lid body so as to be in a close contact state, thereby preventing leakage of the contents.

  Each of the ear portions 3 of the container body 1 is provided with five linear reinforcing grooves 31 so as to draw concentric circles when viewed from the center of the container body 1. The presence of such a line reinforcing groove 31 improves the strength of the ear portion 3 and gives an appropriate “bending”, thereby facilitating the lid opening operation.

  6 is a front view showing an example of the lid according to the present invention, FIG. 7 is a plan view of the lid, FIG. 8 is a bottom view of the lid, and FIG. 9 is an III-III end view of the lid, FIG. 10 is an IV-IV end view of the lid. The lid body 6 of this example is also obtained by molding a synthetic resin sheet material in the same manner as the container main body 1 and has a substantially square shape in plan view so that it can be fitted in conformity with the contour shape of the container main body 1. In addition, a substantially circular raised portion 7 that matches the contour shape of the four receiving recesses 2 in the container main body 1 is provided at the center thereof.

  The lid 6 of this example is also provided with ears 8 that form flat surfaces at the four corners thereof, and a hollow restraining part 81 having a substantially elliptical shape or an oblong shape at the substantially central part of each ear 8. It has been. Each hollow holding portion 81 is formed so that the upper surface portion forms a flat surface, so that it can be easily pressed with the thumb during the lid opening operation. Note that the semicircular protrusions seen on the inner sides of these hollow holding portions 81 are stacking ribs 82 when the lids 6 are overlapped with each other.

  Similarly to the container main body 1, the ridges 9 are erected on the periphery of the lid body 6 over the entire circumference. When the lid body 6 is fitted to the container main body 1, the ridges 9 are brought into close contact with the ridges 5 of the container main body 1 to prevent leakage of the contents. Further, a linear protrusion 92 that is inwardly directed inward is provided on the peripheral wall surface 91 that is suspended from the outer edge of the ridge 9.

  In the packaging container according to the present invention, such linear protrusions 92 are provided only at the four corners of the lid body 6, and the range in which the linear protrusions 92 are provided is limited, whereby the container body 1 and the lid body 6. It achieves harmony between the realization of a tight fit and easy opening operation. Specifically, as shown in FIG. 8, a diagonal line LL ′ that connects a corner located at the upper right in the figure and a corner located at the lower left is assumed, and this diagonal LL ′ is stored in the container body 1. A point of intersection with the contour line of the raised portion 7 in the lid 6 formed so as to correspond to the outer edge of the recess 2 is defined as A. Then, from the intersection A, a vertical line M (line perpendicular to the extension line 100) and a vertical line perpendicular to the extension lines 100 and 101 extending the straight line portions on the two sides forming each corner. Assuming N (a line perpendicular to the extension line 101) and assuming that the intersections of the perpendiculars M and N and the two sides forming the corner are X and Y, respectively, the linear protrusion 92 is cut at each corner. The range to be set is a range that does not exceed between the intersection point X and the intersection point Y.

  The above description is about the upper right corner and the lower left corner in FIG. 8, but the remaining two corners in FIG. 8, namely, the lower right corner and the upper left corner. The range for engraving the linear protrusion 92 is determined in the same manner as described above.

  11 is a front view of the container body 1 of FIG. 1 fitted with the lid body 6 of FIG. 6, FIG. 12 is a longitudinal sectional view of the packaging container in the fitted state, and FIG. It is the elements on larger scale which correspond to the VV part of FIG. 5, and the V'-V 'part of FIG. As shown in these figures, linear protrusions 92 engraved inwardly on the inside of the peripheral wall surface 91 at the four corners of the lid 6 are peripheral wall surfaces 51 suspended from the outer edge of the ridge 5 in the container body 1. Since it engages with the lower edge of the two, it is possible to prevent them from falling off or coming off. The lid opening operation is performed by sliding the container body 1 with the index finger while pressing the hollow holding portion 81 of the lid body 6 with the thumb while sliding the container body 1 outward from the back side. This is done by raising slightly. When the lid body 6 is pulled outward, the linear protrusion 92 of the lid body 6 engaged with the lower edge of the peripheral wall surface 51 in the container 1 comes off with a click. At this time, the presence of the low step portion 83 (in this example, on the same plane as the ear portion 8 in the lid body 6) interposed between the hollow holding portion 81 and the ridge 9 functions like a hinge. Thus, the lid body 6 is easily deformed upward, and the engagement of the linear protrusion is easily released.

It is a front view of the container main body in the packaging container which concerns on this invention. It is a top view of the container main body. It is a bottom view of the same container main body. It is an II line end view in the same container main part. It is an II-II line end view in the container main part. It is the front view which showed an example of the cover body which concerns on this invention. It is a top view of the cover body. It is a bottom view of the same lid. It is an III-III end view of the lid. It is IV-IV end elevation of the same lid. It is a front view of the state which fitted the cover body of FIG. 6 to the container main body of FIG. It is a longitudinal cross-sectional view of FIG. It is the elements on larger scale corresponding to the VV part of FIG. 5, and the V'-V 'part of FIG. 10 when a cover body is attached to the container main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container body 2 Containment recessed part 3 Ear part (container body) 4 Partition wall 5 Convex strip (of container main body) 6 Lid body 7 Raised part 8 Ear part (of lid body) 9 Convex line (of lid body)
21 groove
31 Wire reinforcement groove
51 Perimeter wall (of the container body)
81 Hollow holding part
82 Stacking rib
91 Perimeter wall (of the lid)
92 Linear protrusion

Claims (2)

The container body having a substantially square shape in plan view and having ears that form flat surfaces at the four corner portions excluding the housing recesses, and a flat surface at least at the four corner portions that can be fitted to the container body. In a packaging container configured to fit a ridge standing on the peripheral edge of the container body into a ridge standing on the peripheral edge of the lid body. By providing a linear protrusion inward of the peripheral wall surface suspended from the outer edge of the ridge of the lid, and engaging the linear protrusion with the lower edge of the peripheral wall surface suspended from the outer edge of the ridge of the container body It is one which is adapted achieve the captive, while Ru provided with the linear projection only in four corners, packaging container formed by providing a filament reinforcing grooves a plurality of the ear portion of the container body. The container body having a substantially square shape in plan view and having ears that form flat surfaces at the four corner portions excluding the housing recesses, and a flat surface at least at the four corner portions that can be fitted to the container body. In a packaging container configured to fit a ridge standing on the peripheral edge of the container body into a ridge standing on the peripheral edge of the lid body. By providing a linear protrusion inward of the peripheral wall surface suspended from the outer edge of the ridge of the lid, and engaging the linear protrusion with the lower edge of the peripheral wall surface suspended from the outer edge of the ridge of the container body The linear projections are provided only at the four corners, while the ears of the lid are independent of the inner side of the ridges arranged on the outermost periphery of the lid. And a hollow that forms a protrusion with a flat surface so that a low step portion is interposed between the protrusion and the protrusion Packaging container which is provided with a handle portion.

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