JP4560675B2 - Packaging containers that can engage other containers - Google Patents

Description

  The present invention relates to a packaging container in which other containers having the same flange convex part and flange concave part can be engaged.

  In recent years, food stores such as lunch boxes and side dishes are sold in large quantities in a variety of packaging containers made of synthetic resin at stores such as convenience stores. The packaging containers used in this way can be broadly classified into two types, those of so-called “tray” shape and those composed of a main body and a lid, and any type of container can be used. Since it is disposable, it needs to be inexpensive.

  In order to reduce the cost of packaging containers made of synthetic resin, various things such as mass production, as well as suppressing material costs as much as possible, improving the function by devising the shape etc., and increasing the relative value are various. It has been studied. Furthermore, like the “semiconductor crystal container” shown in Patent Document 1, the main body and the lid body can be molded with the same mold, thereby saving the mold cost and being manufactured as a result. It has also been proposed to make the container cheaper.

  By the way, packaging containers used in stores such as convenience stores are used in a very large amount, and are packed after side dishes are packed at the store side. For this reason, many packaging containers before being used must be stacked so as to avoid dead space as much as possible so that they can be efficiently transported and stored.

In addition, for a packaging container composed of a main body and a lid body fitted to the main body, it is necessary that the lid body can be easily fitted to the main body and at the same time the fitting state can be reliably maintained. is there. This is because if the lid fitted to the main body is easily opened, the contents will spill out.
JP-A-8-31924, abstract, representative figure, FIG. 3, paragraph 0010, paragraph 0013

  The invention described in Patent Document 1 is intended for a “semiconductor crystal container” that is considered to be used in a very small number, but includes technical contents that can also be applied to a container targeted by the present invention. It is thought that there is.

  That is, the invention described in Patent Document 1 is based on the description of the summary of the document, "Providing a container for storing semiconductor crystals using an integrally molded box container of the same size as an upper container and a lower container" This is because the aim is to provide containers at low cost. And as shown in FIGS. 13 and 14, the invention described in Patent Document 1 “forms the container 2 into a box shape using polyethylene terephthalate, and engages protrusions 4 on the upper edge 3 of the container 2. Guide convex portions 5 and 6, guide concave portions 7 and 8, and engagement concave portion 9 are provided, and an arc-shaped cylindrical portion 11 for placing the wafer 1 on the inner walls 23 and 23 inside the box-shaped container is provided by bulging downward. Standing leg portions 14 and 15 that stand higher than the outer periphery of the arc-shaped cylindrical surface are provided, and the guide protrusions and the guide recesses are engaged with each other so that the engagement protrusions 4 and the engagement recesses 9 engage with each other. In addition, the wafer is accommodated in one container and the other container is covered.

  According to the container of this patent document 1, since “a box container of the same size formed integrally is an upper container and a lower container”, as described in paragraph 0006 of the patent document 1, “There is no need to prepare two molds for the upper and lower containers, and there is no need to prepare separate molds for the wafer carrier, so it is economical and only one type of container can be stored. It is thought that the action or effect such as “there is no trouble because it is fast” can be expected.

  However, according to the container of Patent Document 1, as described in Paragraph 0010 of Patent Document 1, “the engaging protrusion 4 (having a diameter of approximately 9.5 mm)” and “(the long side on the right) In the vicinity of the center of the side, a concave portion 9 "having a bottom surface deeper than the engaging protrusion 4 and a width smaller than the diameter of the engaging protrusion 4 and having a width of approximately 8.8 mm) is provided. The upper container and the lower container are engaged with each other by using the mating protrusion 4 and the recess 9.

That is, according to the container of Patent Document 1, as described in Paragraph 0013 of Patent Document 1, “the guide concave portion 7 and the guide convex portion 5 of the container 2 on which the wafer 1 is placed respectively correspond. When the empty container 2 is aligned with the ridges 25 and 26 between the upper edge 3 and the outer edge 10 and the empty container 2 is rotated in the direction of the arrow 24, the container 2 is provided in an L shape at the four corners. The corresponding guide convex portion 5 and the guide concave portion 7 are fitted, and the circumferential central bulging portion of the engaging protrusion 4 invades so as to push the engaging concave portion 9 having a slightly narrower width in the width direction, The engagement protrusion 4 and the engagement recess 9 engage with each other.

  However, when the container described in Patent Document 1 is to be used as a container for food sold at a store such as a convenience store, the following problems are expected. First, stacking is difficult, and secondly, it is difficult to engage.

  Regarding the container of Patent Document 1, it is difficult to stack a large number of them, “the engagement protrusion 4 having a diameter of approximately 9.5 mm” and “the bottom of the engagement protrusion 4 near the center on the right long side”. This is because there is provided an oval-shaped recess 9 "having a depth of approximately 8.8 mm, which is deeper than 4 and smaller in width than the diameter of the engaging protrusion 4. That is, when trying to stack the containers of Patent Document 1, the engaging protrusions 4 and the recesses 9 obstruct the formation of a large dead space. Therefore, a large number of containers can be stored and transported without a dead space. This is because it is impossible.

  Further, the reason why the engaging operation of the container of Patent Document 1 is difficult is that the engaging protrusion 4 and the recessed portion 9 exist. That is, as described above, the engagement protrusions 4 and the recesses 9 are formed so that the circumferential central bulging part of the engagement protrusions 4 pushes the engagement recesses 9 having a slightly narrower width in the width direction. This is because a so-called “forced fitting” must be made. Such “unreasonable fitting” is a great work and a heavy burden as a preparation for selling a large amount of bento and side dishes.

  Therefore, the present inventors have completed the present invention as a result of various investigations on how to make it easy to stack a large number and to easily perform a fitting operation. .

  That is, an object of the present invention is to provide a packaging container that can omit the production mold and can easily perform a large number of stacking and fitting operations.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
"A plurality of flange protrusions 12 that partially protrudes to the flange 11 forming an opening partially concave Mutotomoni against the flange 11, Ru combined to give fit each flange projecting portions 12 each of the plurality a and flange recesses 13 a packing container 10 formed of,
To form the engaging protrusion 12a at least a portion of each flange projection 12, at least a portion of the flange recess 13, to the formation of the engaging concave 13a engageable to the engagement projection 12a Packaging container 10 "
It is.

  In other words, the packaging container 10 according to claim 1 is formed by pressure-airing or vacuum-molding a synthetic resin sheet. The flange convex part 12 formed in the container 10 is fitted into the flange concave part 13 formed in the other packaging container 10 to form a fitting type container composed of a main body and a lid. It can be done. And in order to ensure that the fitting state of the two packaging containers 10 can be reliably maintained, in the packaging container 10 according to this claim 1, the engagement protrusions 12 a are provided on at least a part of the flange protrusion 12. At the same time, at least part of the flange recess 13 is formed with an engagement recess 13a that can engage with the engagement protrusion 12a.

  Of course, if the packaging container 10 which concerns on this Claim 1 has the flange convex part 12 which has the engagement protrusion 12a in the flange 11, and the flange recessed part 13 which has the engagement groove 13a, Two types having different shapes of other portions may be used. That is, the flange convex part 12 which has the engagement protrusion 12a in each flange 11 about two types of packaging containers 10 from which the shape of the side wall 14 and the bottom face 15 differs, and two types of packaging containers 10 from which depth differs. If the flange recess 13 having the engagement recess 13a is formed, both can be fitted.

  In order to fit the two packaging containers 10, as described above, the flange convex portion 12 formed on one packaging container 10 is replaced with the flange concave portion 13 formed on the other packaging container 10. At that time, the engaging protrusion 12 a formed on the flange protrusion 12 engages with the engaging groove 13 a formed on the flange recess 13. Since the packaging container 10 is integrally formed of a synthetic resin sheet, the flange protrusion 12 and the flange recess 13 have flexibility. Therefore, the engagement protrusion 12a and the engagement protrusion 13a are flexible. Are engaged with each other to smoothly complete the engagement. In other words, if the two packaging containers 10 are pressed against each other on the opening side while the flange convex portion 12 and the flange concave portion 13 are opposed to each other, the two can be easily fitted or engaged with each other. It is.

  When two packaging containers 10 are fitted, the flange convex portion 12 protrudes from the flange 11 and the flange concave portion 13 is recessed with respect to the flange 11. It is clear at a glance. Of course, when the two packaging containers 10 have been fitted, whether or not the fitting state is reliable can be easily visually recognized only by looking at the state of the flange convex portions 12 and the flange concave portions 13. It has become a thing.

  When such a packaging container 10 is to be compressed or vacuum formed from a synthetic resin sheet, the engagement protrusion 12a on the flange protrusion 12 side and the engagement protrusion 13a on the flange recess 13 side are so-called “undercut portions”. It becomes. However, since these engagement protrusions 12a and engagement recesses 13a are sufficient if the containers 10 for packaging can be engaged with each other, it is difficult to “die-cut” with respect to their sizes and depths. It doesn't have to be as much as For this reason, the engagement protrusion 12a and the engagement recess 13a which are undercut parts can be easily punched by utilizing the flexibility of the synthetic resin sheet, and the manufacture of the packaging container 10 can be performed. It will not be difficult.

  When the two packaging containers 10 are fitted to each other, a storage space such as a side dish is formed as shown in FIG. Further, as shown in FIG. 6 (a), a predetermined space is created just outside each flange projection 12 of the upper packaging container 10. This space is used for seasoning such as dressing in a bag. It also becomes a storage space for the fee.

  The two packaging containers 10 fitted to each other can be easily opened as follows. Since this packaging container 10 is integrally molded using a synthetic resin sheet as a material, each of the engaging protrusions 12a and the engaging recesses 13a is not only flexible but also formed. The flange convex portion 12 and the flange concave portion 13 themselves are also flexible. For this reason, if both the packaging containers 10 are peeled off by using the finger hooks 16 formed in the best form to be described later or the like, the flanges 11 of both can be peeled off. It is. At this time, if the two are twisted in the opposite directions, each flange convex portion 12 pushes the adjacent flange concave portion 13 or tries to bend itself, so that it can be opened more easily.

  In addition, many of the packaging containers 10 are stacked before use, but as shown in FIG. 7 or 12, the positions of the flange protrusions 12 and the flange recesses 13 are as follows. Are made the same, dead space, that is, useless space hardly occurs. And the engagement protrusion 12a by the side of the flange convex part 12 and the engagement protrusion 13a by the side of the flange recessed part 13 are shown to (a) and (b) of FIG. 7, or (a) and (b) of FIG. As shown, blocking of each packaging container 10 (being tightly fitted and difficult to release) is prevented.

Therefore, the packaging container 10 according to the first aspect can be molded in one mold so that the two can be fitted to each other and can be provided at low cost, and the fitting operation is simple. The large number of stacks can be performed without generating a large dead space. Also, for the user, since two of the same packaging containers 10 can be used as a container main body and a lid, the storage location of the containers can be reduced and the same can be used. , stone Do be wrong lid and body, if twisting both the in opposite directions, because each flange projection 12 is going to deflect Do itself push the flange recess 13 adjacent its open easier It is possible to prevent blocking when the packaging containers 10 are stacked by the engagement protrusions 12a and the engagement recesses 13a.

In order to solve the above problem, the means taken by the invention according to claim 2 is about the packaging container 10 according to claim 1,
“The flange 11 has a polygonal shape, and the flange protrusions 12 and the flange recesses 13 are formed on the portions forming the sides of the flange 11”.
It is.

  In the packaging container 10 according to this second aspect, as shown in FIG. 1 or FIG. 8, the flange 11 seen in plan view has a polygonal outer shape, and a plurality of linear sides are formed on the flange 11. It is what you do. And the packaging container 10 of this Claim 2 was made to form the flange convex part 12 and the flange recessed part 13 in the part which forms each side of the flange 11, as shown in FIG.

  The shapes of the flange convex portion 12 and the flange concave portion 13 can be freely determined within the width of the flange 11 like a semicircular shape or a corrugated shape, but if formed as a linear shape as shown in FIG. Generation | occurrence | production of a molding defect can be suppressed and the design impression which the packaging container 10 whole gives can be made clear. Of course, the mold for molding such a packaging container 10 can also be an inexpensive one having many straight portions.

  Therefore, the packaging container 10 according to the second aspect can achieve the same effect as that of the first aspect and can be excellent in design.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 3 is about the packaging container 10 according to claim 1 described above.
"As well as to the flange 11 as polygonal, that form the shape as bent flange projection 12 and the flange recess 13 at each corner of the flange 11"
It is.

  As shown in FIG. 1 or FIG. 8, the packaging container 10 according to claim 3 also has a polygonal shape of the flange 11 viewed in plan, and the flange 11 has a plurality of linear shapes. An edge is formed. And, as shown in FIG. 8, the packaging container 10 of claim 3 is different from that of claim 2 in that a flange convex portion 12 and a flange concave portion 13 are formed at each corner of the flange 11. It was.

  When the flange protrusions 12 and the flange recesses 13 are formed at the respective corners of the flange 11, the flange protrusions 12 and the flange recesses 13 are not linear but are bent substantially in a “H” shape. . Thus, if each flange convex part 12 and the flange recessed part 13 become bent, the rigidity of itself will become high and the rigidity as the packaging container 10 whole will also be improved.

  Further, if each flange convex portion 12 and flange concave portion 13 are bent, when the two packaging containers 10 fitted together are opened, if both are twisted to the opposite side, each flange convex portion Since the part 12 acts so as to spread the flange recess 13, the engagement between the engagement protrusion 12 a and the engagement recess 13 a can be easily removed.

Therefore, the packaging container 10 of the third aspect not only exhibits the same effect as that of the first aspect, but also can be easily opened after being fitted , as well as each flange protrusion 12. Since the flange recess 13 is bent, its own rigidity is high, and when opening the two packaging containers 10 fitted together, if both are twisted to the opposite side, Since each flange convex part 12 acts so that the flange recessed part 13 may be spread, engagement with the engaging protrusion 12a and the engaging groove 13a can be easily removed.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 4 is the packaging container 10 according to any one of claims 1 to 3,
“Forming ridges or ridges 11a on the flange 11”
It is.

  That is, as shown in FIG. 1 or FIG. 8, the packaging container 10 according to claim 4 is formed with ridges or ridges 11a on the flange 11, so that the rigidity of the flange ridges 12 themselves is increased. It is a thing that raised. 1 and FIG. 8, the ridge 11a is formed, but it goes without saying that the ridge 11a may be formed instead of the ridge 11a.

  Further, as shown in FIG. 6B, for example, the ridges or recesses 11a can be recessed on the outer surface of the fitting container and on the upper surface of the flange 11. Condensed water flowing from the upper packaging container 10 can be stored in the strip 11a. That is, the ridges or ridges 11a can also be used as a dew condensation water storage location.

  Therefore, the packaging container 10 according to the fourth aspect of the present invention exhibits the same function as that of the first to third aspects of the present invention, and the rigidity of the flange 11 itself can be easily increased. is there.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 5 is the packaging container 10 according to any one of claims 1 to 4,
“The bottom surface protrusion 15a that protrudes outward from the bottom surface 15 is formed on the bottom surface 15 of the packaging container 10”.
It is.

  That is, the packaging container 10 according to claim 5 is a device in which the shape on the bottom surface 15 side is devised, and the bottom surface 15 is formed with a bottom surface convex portion 15a protruding outward from the bottom surface 15. It is.

  For example, as shown in FIG. 5, the bottom surface convex portion 15 a is a “leg” of the packaging container 10 because its lower surface protrudes toward the surface of the display shelf or desk. The bottom surface convex portion 15a not only stabilizes the packaging container 10 when placed on a shelf or a desk, but also floats the bottom surface 15 from the shelf surface or the like. It will also improve. In addition, the bottom surface convex portion 15a also serves to prevent the band label from shifting.

  Therefore, the packaging container 10 according to claim 5 exhibits the same function as the packaging container 10 according to any one of claims 1 to 4, and is stabilized when placed. It also has good ventilation.

In order to solve the above problem, the means taken by the invention according to claim 6 is about the packaging container 10 according to claim 5,
“The bottom surface 15 has a bottom recess 15b that is recessed inward from the bottom surface 15 and overlaps the bottom surface protrusion 15a of another packaging container 10”.
It is.

  That is, the packaging container 10 according to claim 6 is formed by forming the bottom surface recess 15b at a position adjacent to the bottom surface projection 15a which was a leg, and the bottom surface recess 15b is a bottom surface projection of another packaging container 10. It will overlap with 15a.

  As shown in FIG. 5, when the packaging container 10 having such a bottom recess 15b is stacked on the packaging container 10 serving as a lid, the bottom surface of the bottom recess 15b is on the lower side. The bottom convex portion 15a of the packaging container 10 is just bulky, and similarly, the bottom convex portion 15a of the packaging container 10 on the lower side overlaps the upper bottom concave portion 15b. Thereby, when another container constituted by another two packaging containers 10 is stacked on a container constituted by using the two packaging containers 10, the bottom surface convex portions 15a and the bottom surface concave portions 15b overlap each other. Thus, the stability when the containers are stacked is ensured.

  Therefore, the packaging container 10 according to the sixth aspect exhibits the same function as that of the fifth aspect and can sufficiently secure the stability during stacking.

And in order to solve the said subject, the means which the invention which concerns on Claim 7 took about the packaging container 10 of the said Claim 6,
“The bottom surface concave portion 15b is formed below the flange convex portion 12, and the bottom surface convex portion 15a is formed below the flange concave portion 13.”
It is.

  That is, in the packaging container 10 according to this seventh aspect, the bottom surface convex portion 15a and the bottom surface concave portion 15b are formed on the bottom surface 15 in the same manner as that of the above-mentioned sixth aspect, but these bottom surface concave portion 15b and bottom surface convex portion are formed. The formation position of 15a is limited to the lower side of each of the flange convex portion 12 and the flange concave portion 13.

  By doing so, as shown in FIG. 3 and FIG. 5 or FIG. 10 and FIG. 11, the flange concave portion 13 is positioned above the bottom surface convex portion 15a, and the flange convex portion is above the bottom surface concave portion 15b. 12 will be located, and the side wall 14 will continue in the horizontal direction with substantially the same width. The fact that the side wall 14 has the same width at all positions of the packaging container 10 means that the thickness of the side wall 14 can be made uniform when the packaging container 10 is formed from a synthetic resin sheet. This means that the molding of the packaging container 10 can be performed stably. That is, the packaging container 10 having a low height and the packaging container 10 having a high height can be stably molded.

  Therefore, the packaging container 10 according to the seventh aspect exhibits the same function as that of the sixth aspect and can stably produce the same.

As described above in detail, in the present invention,
"A plurality of flange protrusions 12 that partially protrudes to the flange 11 forming an opening partially concave Mutotomoni against the flange 11, Ru combined to give fit each flange projecting portions 12 each of the plurality a and flange recesses 13 a packing container 10 formed of,
To form the engaging protrusion 12a at least a portion of each flange projection 12, at least a portion of the flange recess 13, to the formation of the engaging concave 13a engageable to the engagement projection 12a "
The main feature of the structure is that it can be molded in one mold as one that can fit two together, and can be provided at low cost, and the fitting operation is easy It is possible to provide the packaging container 10 that can be stacked without causing a large dead space. In addition, since the packaging container 10 can be used by a user, two of the same packaging containers 10 can be used as a container body and a lid, so that the storage place for the container can be reduced and the same container can be used. Since the lid and the main body are not mistaken for each other, if the two are twisted in the opposite directions, each flange convex portion 12 pushes the adjacent flange concave portion 13 or tries to bend itself. The opening can be easily performed, and the engagement ridges 12a and the engagement recesses 13a can prevent blocking when the packaging containers 10 are stacked. "

  Next, the invention according to each claim configured as described above will be described with reference to the packaging container 10 which is the best mode shown in the drawings. Since it is divided into the packaging container 10A according to the first embodiment shown in FIG. 7 and the packaging container 10B according to the second embodiment shown in FIGS. 8 to 12, description will be given below in the order of these first and second embodiments. I will do it. Of course, the packaging container 10 according to both the embodiments is integrally formed by vacuum or pressure forming the synthetic resin sheet.

FIG. 1 shows a plan view of a packaging container 10A according to the first embodiment of the present invention. This packaging container 10A has a bottom surface 15 as shown in FIGS. It is those in which the upper end of the side wall 14 rising from the periphery is such that the opening, in the opening, as shown in FIG. 1, the flange 11 are formed integrally. The packaging container 10A according to the first embodiment has a regular octagonal shape as viewed in plan, and the outer shape of the flange 11 itself is also a regular octagon. Further, as shown in FIG. 2, the flange 11 is provided with a ridge or a groove 11a on each side of the flange 11 for increasing the rigidity of the flange 11 itself. As shown in FIG. 1, the ridges or ridges 11 a may be divided for each side, but may be continuous over the entire flange 11, or on the contrary, a dotted line state. It may be formed by.

As shown in FIGS. 1 to 4, on each side constituting the flange 11 of the packaging container 10 </ b> A, a flange protrusion 12 having an engagement protrusion 12 a formed on the outer surface and an inner engagement Flange recesses 13 each having a recess 13a are formed. Since these flange convex part 12 and flange concave part 13 are for fitting to that of another packaging container 10A side and aiming at integration of both packaging containers 10A, each side of the polygonal flange 11 Is partially formed.

  As shown in FIG. 2, the flange protrusion 12 protrudes upward from the upper surface of the flange 11 and is fitted into a flange recess 13 described later. On the outer surface of the flange convex portion 12, as shown in FIG. 2, FIG. 4 and FIG. 7 (a), an engaging ridge 12a that protrudes outward from the flange convex portion 12 is formed. In this best mode, the engaging protrusion 12a is forcibly fitted and engaged in an engaging groove 13a on the flange recess 13 side, which will be described later, to engage the packaging container 10A with another packaging container 10A. Since they are to be combined, they are formed so as to be substantially parallel to the flange 11 and the full width of the flange protrusion 12.

  As shown in FIG. 2, the flange recess 13 is formed inside the flange 11 while being recessed from the upper surface of the flange 11, and the flange recess 13 described above is fitted therein. On the inner side surface of the flange recess 13, as shown in FIG. 2 and FIG. 7B, an engagement groove 13 a that protrudes inside the flange recess 13 is formed. The engagement groove 13a of this best mode is one in which the engagement protrusion 12a on the flange convex portion 12 side is forcibly fitted, and engages the packaging container 10A with another packaging container 10A. Therefore, it is formed so as to be substantially parallel to the flange 11 and the full width of the flange recess 13.

  The flange convex part 12 and the flange recessed part 13 comprised as mentioned above are formed in the part which forms each edge | side of the flange 11, as shown in FIG. The shapes of the flange convex portion 12 and the flange concave portion 13 can be freely determined within the width of the flange 11, but if formed as a straight one as shown in FIG. The design impression to be given is not only refreshing, but also the mold for molding such a packaging container 10 is inexpensive with many straight portions.

  When the eyes are moved to the bottom surface 15 side of the packaging container 10 </ b> A, a bottom surface convex portion 15 a that protrudes outward from the bottom surface 15 is formed on the outer peripheral portion of the bottom surface 15. In addition, a bottom surface concave portion 15b that is recessed inward from the bottom surface 15 and overlaps with the bottom surface convex portion 15a of the other packaging container 10 is formed in a portion different from the bottom surface convex portion 15a of the bottom surface 15. is there.

  As shown in FIG. 5, the bottom surface convex portion 15 a protrudes toward the surface of the display shelf or desk, and thus becomes the “leg” of the packaging container 10 </ b> A. Further, the bottom surface convex portion 15a not only stabilizes the packaging container 10A when placed on a shelf or a desk, but also floats the bottom surface 15 from the shelf surface or the like. It's what you do well.

  On the other hand, as shown in FIG. 5, the bottom surface recess 15b is formed on the bottom surface of the packaging container 10A with the bottom surface of the bottom surface recess 15b on the lower side when the top surface is overlaid on the packaging container 10A. It just overlaps the part 15a.

  That is, when the bottom surface convex portion 15a and the bottom surface concave portion 15b are overlapped with each other when another container composed of two other packaging containers 10A is stacked on a container composed of two packaging containers 10A. It overlaps and ensures stability when both containers are stacked.

  Moreover, in the said Example 1, the formation position of these bottom face recessed parts 15b and the bottom face convex part 15a is on the lower side of the flange convex part 12 and the flange recessed part 13, respectively. That is, in this packaging container 10 </ b> A, the bottom surface concave portion 15 b is formed below the flange convex portion 12, and the bottom surface convex portion 15 a is formed below the flange concave portion 13.

  By doing so, as shown in FIG. 3 and FIG. 5, or FIG. 10 and FIG. 11, the flange concave portion 13 is located above the bottom convex portion 15a, and the flange convex portion is located above the bottom concave portion 15b. Since the portion 12 is positioned, the side wall 14 is continuous in the lateral direction with substantially the same width. The fact that the side wall 14 has the same width at all positions of the packaging container 10 means that the thickness of the side wall 14 can be made uniform when the packaging container 10 is formed from a synthetic resin sheet. This means that the molding of the packaging container 10 can be performed stably.

  And if this two packaging containers 10A are used by abutting and fitting each other's opening sides, as shown by the solid line part in FIG. 5, one packaging container 10A is used as the container body and the other is used as the packaging container 10A. A fitting container as a lid is completed. At this time, as shown in FIG. 6, the flange convex portions 12 and the flange concave portions 13 are fitted to each other.

  Moreover, as shown in FIG. 5, if another fitting container shown by the phantom line in FIG. 5 is stacked on the fitting container configured using the two packaging containers 10A, the bottom surface is convex. Stable stacking is achieved by the action of the portion 15a and the bottom recess 15b.

  Further, as shown in FIG. 7, if the packaging containers 10A are stacked in the same direction and position, that is, the upper and lower flange protrusions 12 and flange recesses 13 are stacked in the same position. For example, not only can dead spaces be stacked, but blocking between the packaging containers 10A can be avoided by the engaging protrusions 12a or the engaging recesses 13a.

  8 to 12 show a packaging container 10B according to the second embodiment. This packaging container 10 </ b> B is different from the packaging container 10 </ b> A of Example 1 only in that flange projections 12 and flange recesses 13 are formed at each corner of the flange 11. Accordingly, the same members or portions as those described in the packaging container 10A of the first embodiment are simply denoted by the same reference numerals in FIGS. 8 to 12 and are described for the packaging container 10B of the second embodiment.

  When the flange protrusions 12 and the flange recesses 13 are formed at the respective corners of the flange 11, the flange protrusions 12 and the flange recesses 13 are not linear but are bent substantially in a “H” shape. . Thus, if each flange convex part 12 and the flange recessed part 13 become a thing bent, the rigidity of itself will become high and the rigidity of the packaging container 10B whole will also be improved.

  Further, if each flange convex portion 12 and flange concave portion 13 are bent, when opening the two packaging containers 10B fitted together, if both are twisted to the opposite side, each flange convex portion Since the part 12 acts so as to push the flange recessed part 13 wide, the engagement between the engaging protrusion 12a and the engaging groove 13a can be easily removed.

  Further, the ridges or ridges 11a formed on the flange 11 become like a “weir” at the flange 11 when the two packaging containers 10 are fitted to each other. It will also play a role in preventing liquid leakage.

It is a top view of the packaging container which concerns on Example 1 of this invention. It is a perspective view of the packaging container. It is a front view of the packaging container. It is the longitudinal cross-sectional view of the packaging container seen along the 2-2 line in FIG. It is a front view when a fitting container is comprised with the packaging container and another fitting container is accumulated on this. 1 shows a fitting container formed by using two packaging containers, (A) is a longitudinal sectional view taken along line 1-1 in FIG. 1, and (B) is 2-2 in FIG. It is the longitudinal cross-sectional view seen along the line. 2 shows a state in which two packaging containers are stacked. (A) is a partial sectional view taken along line 2-2 in FIG. 1, and (b) is taken along line 1-1 in FIG. It is a fragmentary sectional view. It is a top view of the packaging container which concerns on Example 2 of this invention. It is a perspective view of the packaging container. It is the elements on larger scale of the packaging container. It is the front view which made a part of the packaging container into the cross section. 2 shows a state in which two packaging containers are stacked. (A) is a partial sectional view taken along line 2-2 in FIG. 1, and (b) is taken along line 1-1 in FIG. It is a fragmentary sectional view. It is a perspective view which shows the prior art. It is a perspective view which shows a prior art when two things shown in FIG. 13 are mutually fitted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging container 10A Packaging container 10B Packaging container 11 Flange 11
11a Projection or recess 12 Flange projection 12a Engagement ridge 13 Flange recess 13a Engagement recess 14 Side wall 15 Bottom 15a Bottom projection 15b Bottom recess 16 Finger hook

Claims (7)

A plurality of flange protrusions partially projecting relative to the flange to form an opening, said flange to partially concave Mutotomoni, before Symbol each flange fitting protrusions respectively engaged obtained are multiple of flange A packaging container formed with a recess,
And forming an engaging protrusion on at least a portion of the front Symbol respective flange protrusions, before SL in at least a portion of each flange recess, the pre Symbol engagement concave engageable to the engagement protrusion A packaging container characterized by being formed. 2. The packaging container according to claim 1, wherein the flange has a polygonal shape, and the flange protrusion and the flange recess are formed in a portion forming each side of the flange. As well as the flange to that of polygonal, packaging container according to claim 1, characterized in that form the shape as bent the flange convex portion and the flange recess at each corner of the flange. The packaging container according to any one of claims 1 to 3, wherein a ridge or a groove is formed on the flange. The packaging container according to any one of claims 1 to 4, wherein a bottom surface protruding portion that protrudes outward from the bottom surface is formed on the bottom surface of the packaging container. The packaging container according to claim 5, wherein a bottom surface recess is formed on the bottom surface so as to be recessed inward from the bottom surface and to overlap with a bottom surface projection of another packaging container. The packaging container according to claim 6, wherein the bottom surface concave portion is formed below the flange convex portion, and the bottom surface convex portion is formed below the flange concave portion.

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