JP5254707B2 - Packaging container - Google Patents

Description

  The present invention relates to a packaging container that is stacked and displayed in multiple stages.

  In food stores in supermarkets, department stores, convenience stores, etc., plastic packaging containers for storing foods such as fresh foods and processed foods are used. This type of packaging container is manufactured by molding a thermoplastic sheet, and includes a container body that opens upward and a lid that is fitted to the container body, and the opening of the container body is the container body and the lid. It can be opened and closed by the fitting structure with the body.

Also, in this type of packaging container, a convex portion is formed on the bottom surface portion of the container body, a concave portion is formed in which the convex portion of the container body enters the top surface portion of the lid, and food is put into the container body. There are products in which the lid is fastened and the packaged products are stacked and displayed in multiple stages (see Patent Document 1). For this reason, this type of packaging container not only requires a certain degree of rigidity in the container body, but the lid body also needs to have a strength that does not crush when stacked in multiple stages. come.
JP 2007-62818 A

  In order to give the lid the necessary strength, a thick thermoplastic sheet may be used as the lid material. However, since the price of crude oil has been rising in recent years, the price of thermoplastic sheets, which are raw materials for container bodies and lids, has increased, and there is a need for low-cost packaging containers molded using as thin a sheet as possible.

  However, in order to meet such a demand, the strength of the packaging container is weakened simply by molding using a thin sheet. And when that happens, when packaging containers are stacked and displayed in multiple stages, the stacked packaging containers and the weight of the food contained therein cover the lid of the packaging container placed thereunder, so that the lid It becomes easy to be crushed.

  Further, in a packaging container in which a convex portion is formed on the bottom surface portion of the container main body and a concave portion in which the convex portion of the container main body enters the top surface portion of the lid, the entire load is concentrated on the lower surface of the convex portion. Is received by the concave portion of the lid. Then, the concave portion is slightly displaced downward, and accordingly, the upper end portion of the peripheral wall portion of the lid body is deformed so as to be pulled downward at the center side, or when it becomes severe, the deformed portion becomes cloudy. As a result, there arises a problem that the appearance of the product at the time of display deteriorates.

  Then, this invention is made | formed in view of the said problem, and makes it a subject to provide the packaging container which a cover body does not collapse easily even if it accumulates and displays in multiple stages.

A packaging container according to the present invention is configured to solve the above-described problem, and includes a container main body and a lid body, and a concave portion for receiving a convex portion formed on a bottom surface portion of the container main body is a lid body. In the packaging container that is formed on the top surface part and can be stacked in multiple stages so that the convex part of the container body enters the concave part of the lid, the lid is transparent, and the concave part of the lid is a flat surface, A bent portion made of a ridge projecting into the lid body is formed at the periphery of the concave portion of the lid body, and the bent portion includes an outer wall portion positioned on the outer side of the ridge, and the outer wall portion includes the container described above. by projecting portion of the container above it is contacted with stacked state in multiple stages, the vessel which is above the said state is characterized Rukoto is prevented from lateral displacement relative to the container below.

  According to such a configuration, a force from above is applied to the concave portion of the lid body by being stacked, and even if the concave portion is slightly displaced downward by the force, the concave portion is buffered and the force is transmitted to the peripheral wall portion. There is nothing. Therefore, the peripheral wall portion of the lid is not deformed, and the appearance of the product at the time of display is very good. The bent portion does not need to be formed along the entire periphery of the concave portion of the lid, and the bent portion is formed at a part of the peripheral portion of the concave portion as long as the buffering action works effectively as a whole. None of the forms can be employed.

  Moreover, the packaging container which concerns on this invention can employ | adopt the structure by which a rib is formed in the surrounding wall part extended below from the outer periphery of the top | upper surface part of a cover body with a suitable space | interval in the circumferential direction.

  According to such a configuration, the strength of the lid can be further improved together with the bent portion.

  Moreover, the packaging container which concerns on this invention can employ | adopt the structure by which the inclined surface part inclined diagonally is formed in a part of peripheral wall part extended below from the outer periphery of the top | upper surface part of a cover body.

  According to such a configuration, for example, a product display label can be attached. In addition, the inclined surface portion has an effect of improving the strength of the lid, similarly to the rib.

  As described above, according to the present invention, since the bent portion made of the ridge protruding into the lid body is formed at the peripheral edge of the concave portion of the lid body, the lid body is not easily crushed even when stacked and displayed.

  Hereinafter, a packaging container (hereinafter simply referred to as “container”) according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the container according to the present embodiment includes a container body 1 that opens upward and a lid body 2 that is fitted to the container body 1. Further, the container is a so-called circular container that forms a circle in a closed state, that is, in a state in which the lid body 2 is attached to the container body 1. Therefore, the container has a circular shape in plan view, and both the container main body 1 and the lid body 2 have a circular shape in plan view.

  The container body 1 and the lid body 2 are formed by molding a plastic sheet (synthetic resin sheet). As the plastic, for example, a material such as polypropylene (PP), polyethylene terephthalate (PET), or polystyrene (PS) is used. Used. The container body 1 may be colored and opaque, and the lid body 2 is preferably transparent in that the contents can be visually recognized through the lid body 2.

  The container main body 1 extends upward (rises) from the outer periphery of the bottom surface portion 10, and more specifically, the peripheral wall portion 11 that inclines so as to bulge outward toward the upper side and extends upward, and the peripheral wall The outer peripheral portion 12 is provided along the outer periphery of the portion 11. On the other hand, the lid body 2 has a top surface portion 20 and a peripheral wall portion 21 that extends downward (hangs down) from the outer periphery of the top surface portion 20, more specifically, a peripheral wall portion 21 that inclines so as to bulge outward toward the lower side and extends downward. And an outer peripheral portion 22 provided along the outer periphery of the peripheral wall portion 21.

  The lid 2 is smaller than the outer diameter of the container body 1, that is, the outer diameter of the outer peripheral portion 22 of the lid body 2 is smaller than the outer diameter of the outer peripheral portion 12 of the container main body 1. This is a so-called inner fitting structure in which the portion 22 is fitted inside the outer peripheral portion 12 of the container body 1. However, not only the inner fitting structure but also a so-called outer fitting structure (a structure in which the lid body is larger than the outer diameter of the container body and the outer peripheral portion of the lid body is fitted outside the outer peripheral portion of the container main body). Also good.

  Further, the bottom portion 10 of the container body 1 is formed (projected) so that an annular convex portion 13 protrudes downward on the outer periphery of the bottom portion 10 of the central portion that protrudes upward in a circular shape. . The annular flat surface in the convex portion 13 becomes a contact surface that comes into contact with the lower surface when the container is placed. On the other hand, a concave portion 23 into which the convex portion 13 of the container body 1 enters is formed in the top surface portion 20 of the lid body 2 so as to be depressed downward (recessed). The circular flat surface in the recess 23 becomes a mounting surface on which the convex portions 13 of the stacked containers are mounted.

  And the recessed part 23 in the top | upper surface part 20 of the cover body 2 is circular similarly to the convex part 13 in the bottom face part 10 of the container main body 1, and is formed in a slightly larger diameter than the convex part 13. FIG. Therefore, in a state where the containers are stacked in multiple stages so that the convex portion 13 of the upper container enters the concave portion 23 of the lower container, the upper container does not shift laterally with respect to the lower container. If the lateral displacement does not occur, the convex portion entering (engaging with) the concave portion 23 does not need to be annular, and may be, for example, a plurality of projections arranged annularly so as to be positioned inside the concave portion 23. Good.

  Further, as shown in the enlarged view of FIG. 2, a bent portion 24 is formed at the periphery of the concave portion 23 of the lid body 2. The bent portion 24 is a ridge (rib) that is formed in a curved shape along the periphery of the recess 23 and protrudes downward (projects into the lid 2). More specifically, the bent portion 24 includes an inner wall portion 24a and an outer wall portion 24b that are opposed to each other with a space therebetween, and a connecting portion 24c that connects the inner wall portion 24a and the outer wall portion 24b (lower edge). Prepare.

  The bent portion 24 is integrally formed when the lid body 2 is molded. For example, a top surface molding part that molds the top surface part 20 of the lid body 2, a peripheral wall molding part that molds the peripheral wall part 21 of the lid body 2, and an outer periphery molding part that molds the outer peripheral part 22 of the lid body 2, The lid body 2 is molded using a mold in which a protrusion for molding the bent portion 24 is formed on the periphery of the top surface molding portion.

  The bent portion 24 becomes an elastically deformable portion that can be elastically deformed, so that the force applied to the concave portion 23 of the lid 2 is less likely to be transmitted to the peripheral wall portion 21, and is added to the peripheral wall portion 21. The force is less likely to be transmitted to the concave portion 23, and therefore acts as a buffer portion that cuts off the continuity between the concave portion 23 (top surface portion 20) and the peripheral wall portion 21. However, since the top surface portion 20 is reinforced by the bent portion 24 and the strength of the lid body 2 is improved, the bent portion 24 also functions as a reinforcing portion.

  In addition, on a part of the peripheral wall portion 21 of the lid 2, for example, an inclined surface portion 25 whose flat surface for attaching a product display label (not shown) is inclined obliquely straddles the top surface portion 20 (the concave portion 23 thereof). In addition, a plurality of longitudinal ribs (vertical ribs) 26 are formed in the circumferential direction on the peripheral wall portion 21 other than the portion where the inclined surface portion 25 is formed. Therefore, the strength of the lid 2 can be further improved together with the strength by the bent portion 24.

  Further, the outer peripheral portion 12 of the container body 1 and the outer peripheral portion 22 of the lid body 2 are not shown in the drawing, but by applying fine irregularities and embossing by molding, a waveform (sinusoidal wave) is obtained. , Triangular wave, trapezoidal wave, etc.), that is, an outer edge line that is not a straight line. As a result, the sharpness of the edges of the outer peripheral edges of the container body 1 and the lid body 2 is eliminated. For example, the fingertip when opening and closing the lid body 2 can be protected, and a packaging film (not shown) It is possible to prevent the packaging film from tearing when wrapping with the use of. Further, the strength of the outer peripheral edge of the container body 1 and the lid body 2 is increased, and there is an effect of preventing the container body 1 and the lid body 2 from being broken. In addition, a knob 27 for opening the lid is formed on a part of the outer peripheral edge of the lid 2.

  The container according to the present embodiment has the above-described configuration. From an unloaded state, the container is stacked so that a force from above is applied to the recessed portion 23 of the lid body 2, and the recessed portion 23 is lowered by the force. Even if it is slightly displaced (see the one-dot chain line in FIG. 4), it is buffered by the bent portion 24 and no force is transmitted to the peripheral wall portion 21. Accordingly, the upper end portion of the peripheral wall portion 21 is not deformed so as to be pulled downward at the center side, and the appearance of the product at the time of display is very good.

  Moreover, since the bending part 24 reinforces the cover body 2, the low-cost packaging container shape | molded using the thinnest sheet | seat as much as possible is realizable.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above embodiment, the inner wall part 24a, the connecting part 24c, and the outer wall part 24b in which the bent part 24 is continuous have a substantially U shape, but the cross-sectional shape of the bent part is not particularly limited. However, it is preferable that the inner wall portion 24a and the outer wall portion 24b are separated from each other in order to effectively work the buffering action.

  Moreover, in the said embodiment, the bending part 24 becomes intermittent in the inclined surface part 25 because the inclined surface part 25 is formed ranging over the top | upper surface part 20 (the recessed part 23) and the surrounding wall part 21 of the cover body 2. FIG. However, the bent portion may be formed in an annular shape by not providing the inclined surface portion 25 or by providing the inclined surface portion 25 so as not to straddle the top surface portion 20 (the concave portion 23 thereof) of the lid 2.

  Moreover, in the said embodiment, although the convex part 13 is formed so that it may correspond with the outer diameter of the bottom face part 10 of the container main body 1, a convex part is made smaller than the bottom face part 10 (however, bottom face part) (Concentric with 10). Or in the said embodiment, although the center part protrudes in the bottom face part 10 of the container main body 1 circularly, the cyclic | annular convex part 13 is formed in the outer periphery, but eliminates the protrusion of a center part. Thus, a circular convex portion may be formed. In that case, if a convex part is formed so that it may correspond with the outer diameter of the bottom face part 10 of the container main body 1, the bottom face part 10 and a convex part will correspond in a structure.

  Moreover, in the said embodiment, although the recessed part 23 is formed so that it may correspond with the outer diameter of the top | upper surface part 20 of the cover body 2, and the top | upper surface part 20 and the recessed part 23 are matched on structure, Further, it may be formed smaller than the top surface portion 20 (but concentric with the top surface portion 20).

  Moreover, in the said embodiment, although the inclined surface 25 is provided for label sticking, it may be for positioning the band which binds the container main body 1 and the cover body 2 together.

  Moreover, in the said embodiment, although the rib 26 is formed in the vertical direction, a rib may be formed in the diagonal direction or spiral shape. The formation direction and shape of the rib can also be selected in relation to the design of the lid 2.

The external appearance perspective view of the packaging container which concerns on this embodiment is shown. Sectional drawing of the container for the packaging is shown. The principal part expanded sectional view of the cover body of the packaging container is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Container main body, 10 ... Bottom part, 11 ... Peripheral wall part, 12 ... Outer peripheral part, 13 ... Convex part, 2 ... Lid body, 20 ... Top surface part, 21 ... Peripheral wall part, 22 ... Peripheral part, 23 ... Recessed part, 24 ... Bending part, 24a ... Inner wall part, 24b ... Outer wall part, 24c ... Connecting part, 25 ... Inclined surface part, 26 ... Rib, 27 ... Picking piece

Claims (3)

A container body and a lid, and a recess for receiving a protrusion formed on the bottom surface of the container body is formed on the top surface of the lid, so that the protrusion of the container body enters the recess of the lid In packaging containers that can be stacked in multiple stages,
The lid is transparent and the recess of the lid is a flat surface.
On the periphery of the concave portion of the lid body, a bent portion made of a ridge protruding into the lid body is formed ,
The bent portion includes an outer wall portion located on the outer side of the ridge, and the outer wall portion is in the state in which the convex portion of the upper container abuts in a state where the container is stacked in the multi-stage. packaging containers container top and said Rukoto is prevented from lateral displacement relative to the container below.   The packaging container according to claim 1, wherein ribs are formed in the circumferential wall portion extending downward from the outer periphery of the top surface portion of the lid body with appropriate intervals in the circumferential direction.   The packaging container according to claim 1 or 2, wherein an inclined surface portion that is inclined obliquely is formed on a part of the peripheral wall portion that extends downward from the outer periphery of the top surface portion of the lid.

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