JP2010269805A - Packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container 10 that minimizes the entire height of the stack of many packaging containers and, at the same time, prevents all the packaging container from inclining toward a sidewall 12c opposite a sidewall 12a provided with support projections 16 for wrapping film. <P>SOLUTION: The packaging container 10 obtained by molding a foam resin sheet so as to include: a substantially rectangular tray portion 15 having a bottom 11 and sidewalls 12 inclining outward while spreading upward in the direction of the opening from the perimeter of the bottom 11; and the support projections 16 for supporting wrapping film, the projections being formed by molding part of one sidewall 12a upward so as to have a mountain-like shape. In the packaging container 10, the sidewalls other than the one that has the support projections 16 have thick protuberant portions 20, which protuberate outside from the external surfaces of the sidewalls 12. The locations where the protuberant portions 20 are formed are such that when the packaging containers 10 of the same shape are stacked in the same direction, the parts where the protuberant portions 20 are formed come into contact with the internal surface or top of the sidewalls 12 of the packaging container located below it, thereby the packaging container located above it can be held in position parallel to the packaging container located below it. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a packaging container in which a foamed resin sheet is molded, and relates to a packaging container provided with a support projection for supporting a wrapping film used at the time of packaging. It is related with the packaging container which shape | molded the foamed resin sheet which enabled it to maintain the stacking attitude | position in the substantially perpendicular | vertical attitude | position when it stacks | stacks.

  Conventionally, for example, as a packaging container for storing foods that are strictly required to maintain freshness such as sashimi, it is excellent in heat insulation and can be reduced in weight. in use. In use, in order to keep the stored items fresh and visible from the outside, the whole is wrapped with a so-called wrapping film such as a transparent film. When wrapped, the wrapping film may come into contact with the stored items and the appearance may deteriorate, or the sashimi may be deformed and crushed by the contact, thereby reducing the commercial value. In order to prevent this, a packaging container in which a support projection is formed on a part of the side wall or the bottom is used, and the entire wrapping film is wrapped (wrapped) in a posture in which a part of the wrapping film is lifted by the tip of the support projection. Therefore, the occurrence of crushing is avoided.

  The packaging container in which this kind of foamed resin sheet is molded is stacked in a cylindrical bag after stacking about 30 to 100 sheets in the same orientation, and a plurality of the packaged bags Is packed in a cardboard case for storage and transportation.

  By the way, a packaging container made by molding a foamed resin sheet is generally very light regardless of shape, and is a lower packaging container when the same shape packaging containers are stacked in a natural state. Until the upper surface side and the back side of the upper packaging container are in close contact with each other, the upper packaging container hardly sinks uniformly toward the lower packaging container. In many cases, the movement of the upper packaging container stops in a state of frictional contact. In which part the partial frictional contact is made depends on the shape of the container and the posture when overlapping.

  That is, when the upper packaging container is superimposed on the lower packaging container without particularly applying a pressing force from above, the upper packaging container is parallel to the lower packaging container. In many cases, the postures are not stacked, and the posture is inclined in any direction depending on the part of the partial frictional contact. Therefore, it is inevitable that the overall posture when stacked is unstable.

  As shown in FIG. 8, in the case of the packaging container 1 in which the supporting projection 3 for the wrapping film is formed on a part of the side wall 2, the packaging container located at the lower position in the space on the back surface of the supporting projection of the upper packaging container The support protrusions of the containers are sequentially stacked so that the partial frictional contact generated during the stacking is caused by the back side of the support protrusions 3 of the upper packaging container and the support protrusions of the lower packaging container. Often occurs first between the three surface sides. On the other hand, the side wall 2b on the side facing the side wall 2a on which the support protrusion 3 is formed is a flat surface as a whole and is slippery. Therefore, when stacked in multiple stages as shown in FIG. 8, the side wall 2a provided with the support protrusion 3 It is inevitable that the side wall 2b facing the surface gradually sinks and the whole side is inclined toward the side wall 2b facing the side wall 2a provided with the support protrusions 3.

  Patent Document 1 describes a packaging container in which one support protrusion is provided on one side wall in a packaging container having a support protrusion as described above. In the packaging container of this form, the partial frictional contact that occurs when stacking is, as described above, the back side of the support projection of the upper packaging container and the surface side of the support projection of the lower packaging container In this case, since there is one support protrusion, the upper packaging container tends to be inclined on the left and right sides of the support protrusion. Therefore, in the packaging container described in Patent Document 1, a receiving part with a part of the side wall protruding outward is provided at a corner located on at least both sides of the side wall provided with the support protrusion, and the packaging container having the same shape. Are stacked so that each receiving portion abuts the inner surface of the receiving portion of the other packaging container, and in that state, the back surface side of the support projection of the upper packaging container and the lower packaging container. By preventing contact with the surface side of the support protrusions, it is possible to prevent the upper packaging container from tilting to the left and right sides of the support protrusions, and to stack a number of packaging containers stably and horizontally. I am doing so.

Japanese Patent No. 36777642

  By the way, in a packaging container provided with a support protrusion for a wrapping film, a strong tightening force is applied to the support protrusion at the time of wrap packaging. Therefore, the support protrusion may be formed thicker than the thickness of the other part of the container. In this embodiment, when inserting and stacking the support protrusions of the packaging container stacked on the lower side into the back space portion of the upper support protrusion, the other thicknesses are compared with the case of the packaging container in which all the thicknesses are equal. It tends to be higher than the stacked portion of the (three) side walls (without supporting projections). For this reason, the sinking of the side wall facing the side wall provided with the support protrusions is further increased, and when a large number of pieces are stacked, the whole is inclined toward the side wall side facing the side wall provided with the support protrusions. The degree is even greater. As a result, since the whole is easily collapsed, there is a problem that the number of stacked stages must be reduced.

  The packaging container described in Patent Document 1 can be expected to be stacked in multiple stages sequentially in a posture in which the packaging container positioned at the upper level is not inclined to the left and right sides around the support protrusion for the wrapping film. However, in the configuration in which the receiving portion is provided only at the corners located on both sides of the side wall provided with the support protrusion, when stacked in multiple stages, it gradually sinks on the side wall facing the side wall provided with the support protrusion. It is unavoidable to go, and it is inevitable that the entire body is inclined toward the side wall.

  By providing a similar receiving portion also at the corner portion of the side wall facing the side wall provided with the support protrusion, it is possible to avoid the above-described inclined posture. However, as described above, the upper and lower packaging containers are stacked in a state where gaps are formed so that the upper and lower support protrusions do not come into contact with each other, and the stacked height is increased by the gap. Even if the distance of one gap is small, as described above, when about 30 to 100 sheets are stacked, the accumulated distance cannot be ignored, and a larger cardboard case is required for storage and transportation. And more storage space is required. Therefore, the loading efficiency at the time of transportation also decreases.

  The present invention has been made in view of the circumstances as described above, and has a substantially rectangular tray portion having a side wall that gradually slopes outward while expanding from the periphery of the bottom surface and the bottom surface toward the upper opening, A packaging container formed of a foamed resin sheet having a supporting projection for supporting a wrapping film formed in a chevron shape with one part facing upward on one side wall of the side wall. It is more improved that it is possible to prevent the entire body from being inclined toward the side wall facing the side wall provided with the supporting projections for the wrapping film while keeping the total stacked height low when stacked. It is an object of the present invention to disclose a packaging container.

  A first form of a packaging container according to the present invention includes a bottom portion and a substantially rectangular tray portion having a side wall that is inclined outward while expanding toward the upper opening from the periphery of the bottom surface, and one side wall of the side wall. A packaging container formed with a foamed resin sheet having a support projection for supporting a wrapping film formed in a mountain shape with a part thereof facing upward, wherein the packaging container is the support of the side wall The side wall not provided with a protrusion has a thick bulging portion that bulges outward from the outer surface of the side wall, and the thick bulging portion stacks packaging containers of the same form in the same direction. At a position where the upper packaging container can maintain a substantially parallel posture with the lower packaging container by contacting the inner surface or top of the side wall of the lower packaging container. Specially formed To.

  A second form of the packaging container according to the present invention includes a bottom portion and a substantially rectangular tray portion having a side wall that is inclined outward while expanding from the periphery of the bottom surface toward the upper opening, and one side wall of the side wall. A packaging container formed with a foamed resin sheet having a support projection for supporting a wrapping film formed in a mountain shape with a part thereof facing upward, wherein the packaging container is the support of the side wall The side wall not provided with a protrusion has a thickened bulging portion that bulges inward from the inner side surface of the side wall, and the thickened bulging portion stacks packaging containers of the same form in the same direction. When the upper side of the side wall of the packaging container is in contact with the upper side, the upper side packaging container is formed in a position that can maintain a substantially parallel posture with the lower level packaging container. It is characterized by.

  In the packaging container according to the present invention, in any form, the side wall provided with the support protrusion for supporting the wrapping film and the corner continuous with the side wall are not formed with a bulging part or a receiving part. Therefore, when two packaging containers are stacked one above the other, the upper and lower support protrusions are in contact with each other, that is, the back side of the support protrusion of the upper packaging container and the support of the lower packaging container It is possible to take a posture in contact with the surface side of the protrusion. Therefore, the total stacked height can be kept low.

  On the other hand, a thick bulged portion, that is, a bulged portion whose thickness is thicker than the thickness of the side wall on which the bulged portion is formed, is formed on the side wall not provided with the support protrusion. By the action, when packaging containers having the same form are stacked in the same direction, the entire packaging container positioned at the upper level can be maintained in a substantially parallel posture with the packaging container positioned at the lower level. Therefore, even if the packaging containers are stacked in multiple stages, the whole can be maintained in a substantially vertical posture while the height is suppressed. This facilitates the operation of packaging a plurality of stacked packaging containers in, for example, a cylindrical bag, and facilitates the operation of packing a plurality of packaged bags into a cardboard case or the like. Since the packaged bag body is low in height and vertical, the space for storage and transportation can be reduced.

  In the packaging container according to the present invention, the thick bulging portion may be formed at a corner formed by other side walls not including the side wall on which the support protrusion is formed in the substantially rectangular tray portion. The side wall in which the support protrusion in the substantially rectangular tray portion is formed may be paired with two side walls that are continuous with the side wall in which the support protrusion is formed in the substantially rectangular tray portion. It may be formed on the side wall opposite to. The form which combined them may be sufficient. It may be formed partially or may be formed in a streak shape along the upper edge of the side wall.

  In any case, by forming a thick bulge at the wall or corner of the substantially rectangular tray portion, the strength of the tray portion can be improved, and the tray portion is cracked during wrap packaging. It can be prevented from occurring, and the container itself can be reduced in weight.

  The said foaming resin sheet used for manufacture of the packaging container by this invention is not specifically limited, A conventionally well-known thing can be used. For example, styrene resin alone, butadiene monomer copolymerizable with styrene monomer, maleic anhydride, methacrylic acid, etc. and styrene monomer copolymer resin alone, mixture of styrene resin and copolymer resin, polyethylene resin, A resin foam sheet obtained by kneading a polypropylene resin or polyethylene terephthalate resin together with a physical foaming agent such as butane or pentane, or a chemical foaming agent such as azodicarbonamide, and extruding and foaming. What laminated | stacked the resin film on the foam sheet can be used.

  The resin film may be laminated only on one side of the resin foam sheet or on both sides. As the resin film laminated on the resin foam sheet, for example, a film using a styrene resin such as a polystyrene resin, a high impact polystyrene resin, a heat-resistant polystyrene resin, or a polyolefin resin such as a polyethylene resin / polypropylene resin is used. A film made of a polyester resin such as a polyethylene terephthalate resin, a film made of a resin excellent in gas barrier properties such as a polyvinyl alcohol resin or a polyvinylidene chloride resin, and the like. . A film in which these films are combined (composite film) can also be cited as a resin film laminated on a foam sheet.

  Especially, as a foamed resin sheet for packaging containers according to the present invention, it is preferable that the foamed resin sheet and the laminated film are made of the same material because the recyclability of the packaging container can be improved.

  Further, it is preferable that a foam sheet to be used is a sheet having a thickness of 0.5 to 5 mm, and a resin film to be laminated is a film having a thickness of about 3 μm to 100 μm.

  The packaging container according to the present invention is manufactured by thermoforming, for example, vacuum forming, pressure forming, vacuum pressure forming, etc., in which the foamed resin sheet is heated and softened, and is molded into a predetermined shape and cooled by a mold or the like. can do.

  In the packaging container according to the present invention, a large number of packaging containers can be stably stacked in a horizontal state with the height being suppressed, so that a large number of stacked packaging containers can be packaged in an exterior bag. The operation of housing in the container becomes easy, and the efficiency of the packaging operation can be greatly improved. In addition, since the package packaged in the exterior bag can be accommodated in the cardboard case in a state where there is no wasted space, the volume of the cardboard case can be reduced, and space saving during storage can be achieved, In addition, loading efficiency during transportation is improved. Furthermore, the strength of the packaging container can be improved by forming the bulging part thicker than the wall part at the corner and / or wall part, and also preventing the packaging container from cracking during wrap packaging It is possible to reduce the weight of the container itself.

The perspective view which shows an example of the packaging container by this invention seeing from an upper surface. 2A is a plan view of the packaging container shown in FIG. 1, and FIG. 2B is a right side view of the packaging container shown in FIG. 3A is a cross-sectional view taken along the line aa in FIG. 2, and FIG. 3B is a cross-sectional view taken along the line bb in FIG. Sectional drawing which shows the part of the support protrusion for wrapping films when the packaging container shown in FIG. 1 is stacked in multiple stages. The side view which shows a state when the packaging container shown in FIG. 1 is stacked in multiple stages. 6 (a) is a plan view showing another example of the packaging container according to the present invention, FIG. 6 (b) is a sectional view taken along the line cc of FIG. 6 (a), and FIG. 6 (c) is FIG. Sectional drawing which follows the dd line | wire of (a). The figure equivalent to FIG.3 (b) which shows the other form of the packaging container by this invention. The figure explaining the state when the packaging container in which the support protrusion for the conventional wrapping film was formed was piled up in multiple stages.

Hereinafter, the present invention will be described based on some embodiments.
The packaging container 10 according to the present invention is a packaging container 10 in which a foamed resin sheet is formed. Basically, as shown in FIGS. 1 and 2, the bottom surface 11 and the periphery of the bottom surface 11 are expanded toward the upper opening. A substantially rectangular tray portion 15 having a side wall 12 that is inclined outward while being opened, and a side wall 12a of the side wall 12 that is formed in a mountain shape with a part thereof facing upward, 1 for supporting a wrapping film Or one or more support protrusions 16. In the illustrated example, two support protrusions 16 having the same shape are formed on the side wall 12a. However, as described above, the number is arbitrary, and the packaging containers 10 having the same shape are arranged in multiple stages in the vertical direction. Each support projection 16 may have a different shape, provided that it can be stacked.

  The foamed resin sheet used for manufacturing the packaging container 10 is as described above. For forming the packaging container 10, thermoforming is preferable in which the foamed resin sheet is heated and softened and then molded into a predetermined shape with a mold or the like and cooled.

  As shown in FIG. 3 (a), a cross section along the line aa in FIG. 2 (a), the surface side and back side of the support protrusion 16 are both flat surfaces, and the surface of the side wall of the four circumferences. The side and back side are also flat surfaces. Further, in the illustrated example, the central portion of the bottom surface 11 is a raised portion 17, and a liquid reservoir portion 18 is formed around the bottom surface 11. A flange 19 whose bottom surface is a horizontal surface and whose top surface is an arc surface is formed on the upper edge of the side wall 12 to increase the strength of the packaging container 10, particularly the tray portion 15. In the illustrated example, the thickness of the support protrusion 16 is substantially the same as the thickness of the side wall 12. However, the thickness of the support protrusion 16 is not deformed by the pressure acting on the support protrusion 16 during lap. The thickness may be larger than the thickness of the side wall 12.

  In the packaging container 10 shown in the figure, the other side wall not including the side wall 12a in which the support protrusion 16 is formed in the substantially rectangular tray portion 15, that is, the three side walls 12b, 12c, 12d excluding the side wall 12a in the figure. As shown in FIG. 2, a bulging portion 20 bulging outward is formed at a corner portion formed at a position slightly below the top of the side wall 12. This region is thicker than other portions of the side wall 12 (see FIG. 3B).

  5 shows a state in which the packaging containers 10 are stacked in multiple stages, and FIG. 4 shows the support protrusions 16 and 16 positioned above and below when the packaging containers 10 are stacked in multiple stages. The positional relationship is shown. As shown in FIG. 5, when the packaging containers 10 are stacked one above the other in the same direction, the bulging portion 20 that bulges outward from the packaging container 10 positioned at the upper position is the packaging positioned at the lower position. The container 10 abuts against the flat inner surface or top of the corresponding corner. And the distance between the top parts of the side walls 12c and 12c on the side facing the side wall 12a on which the support protrusions 16 are formed in the upper and lower packaging containers 10 and 10 changes depending on the contact position.

  On the other hand, as shown in FIG. 4, on the side of the side wall 12 a on which the support protrusion 16 is formed, the upper and lower support protrusions 16, 16 are in contact with each other, that is, the back surface of the upper support protrusion 16 and the lower support protrusion 16. The upper and lower packaging containers 10 are stacked with no useless gaps, that is, as the lowest stacked height regulated by the shape of the packaging container 10. Yes.

  Therefore, by appropriately setting the formation position and / or shape of the bulging portion 20 according to the shape of the packaging container 10, the packaging container 10 positioned at the upper level is almost the same as the packaging container 10 positioned at the lower level. Stacking is possible while maintaining a parallel posture. At the same time, the total stacked height can be set to a low stacked height that does not exceed the height that is inevitably set according to the thickness of the packaging container 10 or the like.

  As shown in the cross-sectional view of FIG. 3B, the shape of the bulging portion 20 is that the outer surface 21 is a substantially vertical surface and the lower end surface 22 is a substantially horizontal surface. Although it is preferable from the viewpoint of ease when the packaging container 10 is demolded, the present invention is not limited thereto. In addition, the outer surface 21 may be perpendicular to the die-cutting direction, but since the molding material is a foamed resin sheet, it may be somewhat reversely tapered with respect to the punching direction. In this case, the bulging portion 20 can have a shape in which the lower end portion 22 bulges outward as compared with the outer surface 21 being a vertical surface. The purpose of the period can be achieved.

  As described above, in the packaging container 10 described above, the height is suppressed when the packaging containers 10 having the same form are stacked in the same direction by the action of the bulging portion 20 bulging outward. Thus, the whole can be maintained in a substantially vertical posture. Therefore, it becomes very easy to wrap a group of packaging containers in which a large number are stacked with a cylindrical bag (not shown). In addition, it is easy to pack a plurality of packaged bags in a cardboard case or the like. Furthermore, since the packaged bag body is low in height and vertical, the space for storage and transportation can be reduced.

  Further, when the packaging container 10 is packaged using a wrapping film, the packaging container 10 has support protrusions 16 for the wrapping film, so that the sashimi and the like may be deformed and crushed due to contact with the wrapping film. In addition to being able to avoid, the bulging portion 20 formed at the corner can improve the strength of the tray portion 15 and can prevent the tray portion 15 from cracking during wrap packaging. it can.

  The bulging portion 20 can be formed, for example, as follows. When the packaging container 10 is formed by double-sided or single-sided vacuum forming with a foamed resin sheet sandwiched between the male and female dies of the vacuum forming machine, The space for molding formed when the female mold is closed is wider than other portions. Before thermoforming, a gap is formed between the foamed resin sheet and the mold surface, but in vacuum molding, air inside the mold is sucked from the fine air inlets formed on the mold surface. The By this suction, the gap between the foamed resin sheet and the mold is in a vacuum state. At this time, the foamed resin sheet is in a heated and softened state, and the expanded portion 20 is formed by increasing the thickness of the portion by thermal expansion and evacuation of bubbles in a vacuum state. Is done.

  FIG. 6 illustrates another embodiment of the packaging container according to the present invention. In this packaging container 10A, instead of the bulging portion 20 formed at the corner as a thick bulging portion that bulges outward, the side wall 12a in which the support protrusion 16 in the substantially rectangular tray portion 15 is formed. Are formed on the two side walls 12b and 12d that are continuous with each other, and a second thickened bulging portion 20a that bulges outward is formed, and further, the side wall that faces the side wall 12a on which the support protrusion 16 is formed. 12c is also formed with a third thickened bulging portion 20b that bulges outward.

  As in the case of the bulging portion 20 described above, the second thickened bulging portion 20a and the third thickened bulging portion 20b are arranged in a packaging container in which the upper packaging container is located lower. By forming and setting the position and shape so as to maintain a substantially parallel posture, the packaging containers 10A can be stacked in multiple stages while maintaining a parallel posture to each other, and a stable stacked posture Can be obtained.

  Although not shown in the drawings, as another embodiment, the second side wall 12b, 12d that is continuous with the side wall 12a on which the support protrusion 16 is formed in the substantially rectangular tray portion 15 is bulged outwardly to form a pair. A form in which only the thick bulge part 20a is formed, or a form in which only the third thick bulge part 20b bulging outward is formed on the side wall 12c opposite to the side wall 12a on which the support protrusion 16 is formed. Even so, it can be easily understood that each packaging container can achieve the intended purpose.

  Further, for the packaging container 10A provided with the second and third bulging portions 20a and 20b in the form shown in FIG. It is also possible to form the bulging portion 20 bulging outward as described above at the corner formed by 12d.

  Further, when forming the second thick bulged portion 20a and the third thick bulged portion 20b, the bulged portions are partially formed along the top portions (flange portions 19) of the side walls. It may also be formed along the entire length of the top. In the latter case, an effect of reinforcing the peripheral edge of the side wall of the substantially rectangular tray portion 15 is also brought about.

  In the above description, the thick bulging portions 20, 20a, and 20b have been described as bulging outward. However, as shown in FIG. It can also be set as the bulging part 20c of the shape which bulges inside the tray part 15. FIG. However, in this case, when the packaging containers having the same form are stacked in the same direction, the outer surface of the side wall 12 of the packaging container located at the upper position is bulged with the wall thickness bulging inwardly located at the lower position. By contacting the part 20c, the packaging container positioned at the upper level is held in a substantially parallel posture with the packaging container positioned at the lower level. In addition, although not shown in figure, the above-mentioned 2nd thick bulging part 20a and 3rd thick bulging part 20b can also be formed as a bulging part of the shape bulged inside.

10: Packaging container according to the present invention,
11 ... Bottom,
12 (12a, 12b, 12c, 12d) ... sidewalls
15: A substantially rectangular tray,
16 ... support protrusions for supporting the wrapping film,
17 ... the raised part on the bottom,
18 ... Liquid reservoir,
19 ... Flange formed on the upper edge of the side wall,
20, 20a, 20b ... a bulging portion bulging outward,
20c: a bulging portion having a shape bulging inward,
21 ... the outer surface of the bulge,
22 ... Lower end surface of the bulging portion.

Claims (6)

A substantially rectangular tray portion having a side wall that is inclined outward while expanding from the bottom surface and the periphery of the bottom surface to the upper opening, and a portion of the side wall is formed in a mountain shape with one side facing upward. In a packaging container in which a foamed resin sheet provided with a supporting projection for supporting a wrapping film is formed,
The packaging container has a thick bulging portion that bulges outward from an outer surface of the side wall on a side wall of the side wall that does not include the support protrusion, and the thick bulging portion. Is a packaging container in which the packaging container located in the upper position is positioned in the lower position by contacting the inner surface or the top of the side wall of the packaging container positioned in the lower position when the packaging containers of the same form are stacked in the same direction. A packaging container, wherein the packaging container is formed in a position capable of maintaining a substantially parallel posture. A substantially rectangular tray portion having a side wall that is inclined outward while expanding from the bottom surface and the periphery of the bottom surface toward the upper opening, and a portion of the side wall is formed in a mountain shape with one side wall facing upward. In a packaging container in which a foamed resin sheet provided with a supporting projection for supporting a wrapping film is formed,
The packaging container has a thick bulging portion that bulges inward from an inner surface of the side wall on a side wall of the side wall that does not include the support protrusion, and the thick bulging portion. When the packaging containers of the same form are stacked in the same direction, the upper side of the packaging container located at the upper position comes into contact with the packaging container positioned at the lower position so that the packaging container located at the upper position is almost the same as the packaging container positioned at the lower position. A packaging container characterized by being formed at a position where a parallel posture can be maintained.   The said thick bulge part is formed in the corner part formed by the other side walls which do not include the side wall in which the support protrusion in the said substantially rectangular tray part was formed. The packaging container according to 2.   3. The thick bulge portion is formed so as to be paired with two side walls that are continuous with the side wall on which the support protrusion is formed in the substantially rectangular tray portion. Packaging container according to 1.   The packaging container according to claim 1, wherein the thickened bulging portion is formed on a side wall facing a side wall on which the support protrusion is formed in the substantially rectangular tray portion.   The said thick bulge part is each formed in the two side wall which continues to the side wall in which the support protrusion in the said substantially rectangular tray part was formed, and the opposing side wall, The Claim 1 or 2 characterized by the above-mentioned. The packaging container as described.

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