JP2017114530A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that inhibits breakage of an object to be packaged with a simple structure even when an impact acts on a lower end of a packaging container.SOLUTION: The packaging container 1 includes: a cylindrical body part 2; and a bottom part 4 for occluding an opening on a lower side of the body part 2. The bottom part 4 has a slope inclined upward greater as proceeding inside and is recessed inward of the body part 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging container that accommodates an object to be packaged, and particularly to a packaging container having a buffering function for suppressing breakage of an object to be packaged.

  In the past, packaging containers equipped with a buffer function have been provided to suppress breakage of fragile packaging objects such as glass bottles contained in the packaging container when an impact is applied to the lower end of the packaging container due to falling to the floor, etc. Are known.

  For example, Patent Document 1 discloses a pair of flaps provided at the lower ends of a pair of opposing side surfaces, a first support piece that rises inward of the box at a substantially right angle to the end of the flap, and a first support piece. Buffering function provided with a second support piece that is located at a substantially continuous position with respect to the flap and is supported by the first support piece and the second support piece that are appropriately bent. A packaging box is disclosed.

JP 2008-143565 A

  However, in the conventional packaging containers including those of the above-mentioned Patent Document 1, in order to provide a buffer function, elements that are not essential in the packaging container such as the first and second support pieces are added, so that the structure is obtained. There is a problem that becomes complicated.

  The present invention has been made in view of such points, and an object of the present invention is to provide a technique for suppressing breakage of a packaging object with a simple structure even when an impact is applied to the lower end of the packaging container. is there.

  In order to achieve the above object, the packaging container according to the present invention is an indispensable element in the packaging container, and is packaged at a position higher than the lower end of the packaging container by recessing the bottom portion which has been conventionally formed flat. The object is supported.

  Specifically, the present invention is directed to a packaging container including a cylindrical main body portion and a bottom portion that closes an opening on the lower side of the main body portion.

  And the said bottom part has the inclined surface which inclines upwards so that it goes inside, and at least one part is dented inward of the said main-body part, It is characterized by the above-mentioned.

  According to this configuration, since the bottom portion has an inclined surface and at least a portion is recessed inward of the main body portion, when the packaging object is accommodated in the main body portion, the upper end portion of the bottom portion is the packaging object. Since it hits the bottom, the packaging object can be supported above the lower end of the main body. Thereby, even when an impact acts on the lower end of the packaging container, damage to the packaging object can be suppressed with a simple structure in which the bottom, which is an essential element in the packaging container, is depressed.

  Moreover, in the said packaging container, it is preferable that the said main-body part is a polygonal cylinder shape, and the said inclined surface is inclined and extended from each base of the said main-body part.

  According to this configuration, since the inclined surface is inclined and extended from each bottom side of the main body portion, the entire bottom portion is recessed inward of the main body portion, so that the packaging object can be securely attached to the lower end of the main body portion. Can be supported on the upper side. In addition, the bottom part into which the whole is depressed may be depressed in a pyramid shape, for example, or may be depressed in a truncated pyramid shape.

  Furthermore, in the packaging container, the bottom portion is preferably recessed in a polygonal pyramid shape.

  According to this configuration, the structure of the packaging container can be further simplified by recessing the bottom in a polygonal pyramid, for example, compared to the case where the bottom is recessed in a truncated pyramid (truncated polygonal pyramid). Can do.

  Further, in the packaging container, the main body portion is in a square cylindrical shape, and the bottom portion is changed from a state in which the main body portion is folded flat together with the main body portion to the fourth shape as the main body portion is deformed into a square cylindrical shape. It is preferable to be recessed in a pyramid shape.

  According to this configuration, the packaging container can be folded into a flat shape at the time of storage or transportation, while the packaging container can be formed into a box shape with a single touch when packing the packaging object. Convenience during storage and transportation and workability during boxing can be improved.

  By the way, in a packaging container, for example, a plurality of cylindrical glass bottles may be accommodated side by side in parallel, or a horizontally long packaging object may be accommodated, so that a packaging container folded in a flat shape can be formed into a box shape with one touch. The configuration of forming is desirably applied not only to a packaging container having a square cylindrical main body but also to a packaging container having a rectangular cylindrical main body.

  Therefore, in the packaging container, the main body portion has a rectangular cylindrical shape, and the bottom portion closes as the main body portion is deformed into a rectangular cylindrical shape from a state of being folded flat together with the main body portion. It is preferable to dent in a ridge shape.

  In addition, the “boarding shape” means a shape in which the surface constituting the depression is divided in four directions from the uppermost portion of the depression, and more specifically, the upper bases coincide with each other and go to the lower base. A pair of isosceles trapezoidal inclined surfaces that are inclined so as to be separated from each other, and a pair of isosceles triangular inclined surfaces in which V-shaped legs and their isosceles sides coincide with each other at both ends of the pair of inclined surfaces Means.

  According to this configuration, even in a packaging container having a rectangular cylindrical main body, the packaging container can be formed into a box shape with a single touch. Can be improved.

  Further, in the packaging container, the bottom portion is divided into first and second bottom portions respectively connected to two adjacent bottom sides of the main body portion in a state where the bottom portion is folded flat, while the main body portion is square. In the cylindrical state, the first bottom portion and the second bottom portion are connected to each other, and the first and second bottom portions have a rectangular tube shape when the main body portion is in a rectangular tube shape. It is preferable that engaging portions that engage with each other are provided.

  According to this configuration, it is possible to maintain a state in which the bottom portion is recessed in a quadrangular pyramid shape or a dormitory shape with a simple structure in which engagement portions are provided on the first and second bottom portions, respectively.

  As described above, according to the packaging container according to the present invention, even when an impact is applied to the lower end of the packaging container, damage to the packaging object can be suppressed with a simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which shows typically the packaging container which concerns on Embodiment 1 of this invention, The figure (a) is the figure which looked at the packaging container from diagonally upward, The figure (b) shows the packaging container from diagonally downward. FIG. It is an expanded view of a packaging container. It is a figure which shows typically the assembly procedure of a packaging container. It is a figure which shows typically the state which folded the packaging container into flat shape. It is a figure which shows typically the deformation | transformation process of a packaging container. 1A is a cross-sectional view taken along line VIa-VIa in FIG. 1, and FIG. 1B is a cross-sectional view taken along line VIb-VIb in FIG. 1A. It is a figure which shows typically the state which accommodated the packaging target object. It is the perspective view seen from diagonally downward which shows the packaging container which concerns on Embodiment 2 of this invention typically. It is an expanded view of a packaging container. It is the perspective view seen from the diagonal front which shows a packaging container typically. It is a perspective view which shows typically the packaging container which concerns on other embodiment. It is a perspective view which shows typically the packaging container which concerns on other embodiment. It is a perspective view which shows typically the packaging container which concerns on other embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, “folding line” means a line that clearly indicates the folding position and makes it easy to fold paper, for example, by forming a cut groove or embossing. For example, a part actually folded along such a fold line is referred to as a “fold line”.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing a packaging container 1 according to the present embodiment. FIG. 1 (a) is a view of the packaging container 1 as viewed obliquely from above, and FIG. FIG. 2 is a development view of the packaging container 1. The packaging container 1 includes a square cylindrical main body 2, a lid 3 that closes the upper opening of the main body 2, and a bottom 4 that closes the lower opening of the main body 2. For example, a glass container (packaging target) 110 (see FIG. 7) such as a vial is configured to be housed therein.

  The main body 2 has a front plate 5 and a back plate 7 that face each other, and a pair of side plates 6 and 8 (see FIG. 2) that face each other. The front plate 5 is connected to the side plates 6 and 8 so as to be orthogonal to each other via the folds 21 and 24, and the back plate 7 is orthogonal to the side plates 6 and 8 via the folds 22 and 23, respectively. It is connected continuously.

  As shown in FIG. 1A, the lid 3 includes an upper surface plate 9 that is connected to the back plate 7 via the fold line 27, and an insertion piece 9 a that is connected to the upper surface plate 9 and the fold line 25. , And a pair of side plates 6 and 8 and flaps 6a and 8a connected through fold lines 26 and 28, respectively.

  The bottom portion 4 includes a first bottom plate 10 connected to the front plate 5 via the fold 29, a second bottom plate 11 connected to the side plate 6 via the fold 30, the back plate 7 and the fold 31. 3 and the fourth bottom plate 13 connected through the side plate 8 and the fold line 32, as shown in FIG. It is indented in the shape of a quadrangular pyramid.

  The packaging container 1 is assembled by punching out the coated ball along the development view shown in FIG. 2, bending it along the folding line, and pasting a predetermined portion. In FIG. 2, the outer surface side of the main body 2 is described as being the front side of the drawing.

−Development diagram−
In the developed view shown in FIG. 2, a rectangular front plate 5 is connected to the left side of the rectangular side plate 6 via a fold line 21a, and a rectangular shape is formed on the left side of the front plate 5 via a fold line 24a. The side plate 8 is continuously provided, the left side of the side plate 8 is provided with a rectangular back plate 7 via a fold line 23a, and the left side of the back plate 7 is provided with a margin 7a via a fold line 22a. Are connected. Further, on the upper side of the side plate 6 and the side plate 8, flaps 6a and 8a are connected to each other through folding lines 26a and 28a, respectively. Further, a square upper surface plate 9 is connected to the upper side of the back plate 7 via a folding line 27a, and an insertion piece 9a is connected to the upper side of the upper surface plate 9 via a folding line 25a.

  A second bottom plate 11 constituting the bottom portion 4 is connected to the lower side of the side plate 6 via a folding line 30a. The second bottom plate 11 has a bottom side that is connected to the bottom side of the side plate 6 via a folding line 30a, a second bottom plate main body portion 11a having an isosceles triangle shape, and a left side equal side of the second bottom plate main body portion 11a. And an adhesive margin portion 11b provided continuously through a folding line 33a.

  A first bottom plate 10 constituting the bottom portion 4 is connected to the lower side of the front plate 5 via a folding line 29a. The first bottom plate 10 has a trapezoidal first bottom plate main body portion 10a whose lower bottom (long bottom) is connected to the bottom side of the front plate 5 via a folding line 29a, and an upper bottom of the first bottom plate main body portion 10a. And two first engaging portions 10b provided at the left and right end portions of the (short bottom).

  On the lower side of the side plate 8, a fourth bottom plate 13 constituting the bottom portion 4 is provided continuously via a folding line 32a. The fourth bottom plate 13 has a bottom side that is connected to the bottom side of the side plate 8 via a fold line 32a, a fourth bottom plate main body portion 13a having an isosceles triangle shape, and a left side equal side of the fourth bottom plate main body portion 13a. And an adhesive margin portion 13b provided continuously through a folding line 34a.

  A third bottom plate 12 constituting the bottom portion 4 is connected to the lower side of the back plate 7 via a folding line 31a. The third bottom plate 12 has a trapezoidal third bottom plate main body portion 12a whose lower bottom (long bottom) is connected to the bottom side of the back plate 7 via a folding line 31a, and an upper bottom of the third bottom plate main body portion 12a. The second engaging portion 12b is provided at the left and right center portion of the (short bottom) and fits between the two first engaging portions 10b.

  As described above, the packaging container 1 according to the present embodiment has only three margins, namely, the margin portion 7a, the margin portion 11b, and the margin portion 13b, and has a simple configuration.

-Assembly procedure-
Next, the assembly procedure of the packaging container 1 configured as described above will be described.

  First, the coated ball is punched in accordance with the development view of FIG. 2, and reversed so that the back surface of FIG. Then, as shown in FIG. 3A, the second bottom plate 11 is valley-folded along the fold line 30 a so as to overlap with the side plate 6, and the first bottom plate 10 is folded so as to overlap with the front plate 5. Fold the bottom plate 13 along the fold line 32 a so that it overlaps the side plate 8, and fold the third bottom plate 12 along the fold line 31 a so that it overlaps the back plate 7. To do.

  Next, as shown in FIG. 3B, in the second bottom plate 11, the glue margin portion 11 b is cut and valley-folded along the fold line 33 a so as to overlap the second bottom plate main body portion 11 a, and in the fourth bottom plate 13. The margin part 13b is cut and valley-folded along the fold line 34a so as to overlap the fourth bottom plate main body part 13a. Then, as shown by hatching in FIG. 3B, the adhesive is applied to the inner side surfaces of the margin portion 11b and the margin portion 13b facing the front side by folding the valley.

  Next, as shown in FIG. 3C, the back plate 7 is valley-folded along the fold line 23 a so as to overlap the side plate 8. When the side plate 8 and the back plate 7 overlap, the fourth bottom plate 13 and the third bottom plate 12 overlap at the same time, so that the inner side surface of the adhesive margin 13b to which the adhesive is applied is on the outer side surface of the third bottom plate 12. It is pasted. Thereby, the 3rd bottom plate 12 and the equal side of the 4th bottom plate main-body part 13a are provided in series via the paste margin part 13b. Then, as shown by hatching in FIG. 3C, an adhesive is applied to the outer surface of the glue margin 7 a facing the front side by folding the valley.

  Next, as illustrated in FIG. 3D, the side plate 6 is valley-folded along the fold line 21 a so as to overlap the front plate 5. As a result, the outer surface of the adhesive margin portion 7 a to which the adhesive has been applied is affixed to the inner surface of the side plate 6. At the same time, since the second bottom plate 11 and the first bottom plate 10 overlap, the inner side surface of the glue margin portion 11b to which the adhesive is applied is attached to the outer surface of the first bottom plate 10, and the glue margin portion The first bottom plate 10 and the equal side of the second bottom plate main body 11a are continuously provided via 11b. Thereby, the assembly of the packaging container 1 is completed.

−Structure of packaging container−
The packaging container 1 assembled as described above is configured as a bottom-locked packaging container that can be deformed with one touch from a flat folded state to a bottomed cylindrical shape that can accommodate a packaging object.

  Specifically, when the packaging container 1 is folded in a flat shape as shown in FIG. 4, the fold line 21 is closed, the front plate 5 and the side plate 6 are overlapped, and the fold line 23 is closed. The back plate 7 and the side plate 8 overlap each other. The first bottom plate 10 connected to the bottom side of the front plate 5 and the second bottom plate 11 connected to the bottom side of the side plate 6 (hereinafter, the first and second bottom plates 10 and 11 are also collectively referred to as a first bottom portion 4a). Between the folded front plate 5 and side plate 6, the folds 29, 30, 33 are closed and folded. Furthermore, the third bottom plate 12 connected to the bottom side of the back plate 7 and the fourth bottom plate 13 connected to the bottom side of the side plate 8 (hereinafter, the third and fourth bottom plates 12 and 13 are also collectively referred to as a second bottom portion 4b). The folded folds 31, 32, 34 are closed and folded between the folded back plate 7 and side plate 8. Thus, since the packaging container 1 of this embodiment will not be bulky if it is folded flat, it can improve the convenience at the time of storage and conveyance.

  When the packaging container 1 is deformed into a bottomed cylindrical shape so as to accommodate the packaging object in the packaging container 1, a force is applied to the fold line 21 and the fold line 23 in the direction indicated by the white arrow in FIG. As a result, the packaging container 1 changes from a flat state to a three-dimensional shape.

  More specifically, with respect to the main body 2, when a force is applied to the fold line 21 and the fold line 23, the fold line 21 and the fold line 23 approach each other in a diagonal direction as the closed fold lines 21 and 23 open. As the front plate 5 and the side plate 8 (and the back plate 7 and the side plate 6) connected to each other are bent along the fold line 24a (fold line 22a) and the fold lines 22 and 24 are closed, The fold line 22 and the fold line 24 are separated in a diagonal direction. Then, when the folds 21 and 23 open to 90 ° and the folds 22 and 24 close to 90 °, the front plate 5 and the back plate 7 face each other, and the side plate 6 and the side plate 8 face each other. A square cylindrical main body 2 is formed.

  On the other hand, the bottom portion 4 is configured to be recessed in a quadrangular pyramid shape as the main body portion 2 is deformed into a square cylindrical shape from the flat folded state together with the main body portion 2.

  More specifically, as the closed fold line 21 is opened, the closed fold lines 29, 30, 33 are opened, the folded first bottom portion 4a is developed, and the closed fold line 23 is opened. Accordingly, the closed fold lines 31, 32, and 34 are opened, and the folded second bottom portion 4b is developed. In parallel with this, as the fold lines 22 and 24 are closed, as shown in FIG. 5, the first bottom portion 4 a and the second bottom portion 4 b that have been divided into two portions approach diagonally. Then, when the square cylindrical main body 2 is formed, the folds 29, 30, 31, and 32 open to about 60 °, respectively, and as shown in FIG. 6 (a), the first bottom plate main body 10a The upper bottom and the upper bottom of the third bottom plate main body 12a abut, the equal side of the second bottom plate main body 11a opposite to the adhesive margin 11b abuts the outer surface of the third bottom plate 12, and The equal side of the four bottom plate main body portion 13a opposite to the adhesive margin portion 13b abuts on the outer surface of the first bottom plate 10, whereby the lower opening of the main body portion 2 is closed.

  At this time, as shown in FIG. 6B, the second engagement portion 12b of the third bottom plate 12 is fitted between the two first engagement portions 10b of the first bottom plate 10, so that both are engaged. (The lock is applied), the main body 2 is in the shape of a square cylinder, the first bottom 4a and the second bottom 4b are connected, and the lower opening of the main body 2 is closed by the bottom 4. Is done.

  In the bottom part 4 formed in this way, the second bottom plate main body part 11a forms an isosceles triangular inclined surface that is inclined about 30 ° upward as it goes inward from the bottom side of the side plate 6. The bottom plate main body 13a forms an isosceles triangular inclined surface that is inclined approximately 30 ° upward as it goes inward from the bottom of the side plate 8.

  In addition, the trapezoidal first bottom plate main body portion 10a is connected to the equal sides of the second bottom plate main body portion 11a through the adhesive margin portion 11b, and the equal sides of the fourth bottom plate main body portion 13a are in contact with each other. A part is hidden from the outside by the second and fourth bottom plate main body portions 11 a and 13 a, and only an isosceles triangular portion appears on the outer surface of the bottom portion 4. Similarly, the trapezoidal third bottom plate main body portion 12a has the same sides of the fourth bottom plate main body portion 13a connected to each other via the adhesive margin 13b, and the equal sides of the second bottom plate main body portion 11a abut, A part thereof is hidden from the outside by the second and fourth bottom plate main body portions 11 a and 13 a, and only an isosceles triangular portion appears on the outer surface of the bottom portion 4. Accordingly, in the bottom portion 4, a portion appearing on the outer surface of the first bottom plate main body portion 10 a forms an isosceles triangular inclined surface that is inclined approximately 30 ° upward as it goes inward from the bottom side of the front plate 5. In addition, the portion appearing on the outer surface of the third bottom plate main body 12a forms an isosceles triangular inclined surface that is inclined approximately 30 ° upward as it goes inward from the bottom of the back plate 7.

  As described above, by having the four isosceles triangular inclined surfaces extending inclinedly from the respective bottom sides of the main body 2, the bottom 4 is recessed in a quadrangular pyramid shape.

  As shown in FIG. 7, when the glass container 110 is inserted into the packaging container 1 in which the bottom 4 is recessed in a quadrangular pyramid shape, the upper ends of the first bottom plate 10 and the third bottom plate 12 are the bottom of the glass container 110. Therefore, the glass container 110 can be supported above the lower end of the main body 2. Thereby, even when an impact acts on the lower end of the packaging container 1, damage to the glass container 110 can be suppressed with a simple structure in which the bottom 4 is recessed in a quadrangular pyramid shape.

  In addition, since the margin portion 11b and the margin portion 13b are attached to the first bottom plate 10 and the third bottom plate 12, respectively, the strength of the first bottom plate 10 and the third bottom plate 12 that directly supports the glass container 110. Can be increased. Further, the first bottom plate 10 is connected with the equal sides of the second bottom plate main body portion 11a and the equal sides of the fourth bottom plate main body portion 13a are in contact with each other, and the third bottom plate 12 is contacted with the fourth bottom plate main body portion 13a. Since the equal sides of the second bottom plate main body 11a are in contact with each other, the force acting on the first bottom plate 10 and the third bottom plate 12 (weight of the glass container 110) is applied to the second bottom plate 11. And can be dispersed in the fourth bottom plate 13. Thus, in the packaging container 1 of the present embodiment, the improvement in the strength of the first bottom plate 10 and the third bottom plate 12 and the dispersion of the force to the second bottom plate 11 and the fourth bottom plate 13 are combined, It is possible to suppress the drop of the bottom portion 4 due to the bending of the first bottom plate 10 and the third bottom plate 12 that directly support the glass container 110.

  In the present embodiment, the first to fourth bottom plates 10, 11, 12, and 13 that are inclined by about 30 ° with respect to the horizontal direction have formed the quadrangular pyramid-shaped depressions. By adjusting the inclination angle of the fourth bottom plates 10, 11, 12, 13 with respect to the horizontal direction (by adjusting the lengths of the first to fourth bottom plates 10, 11, 12, 13), the depression of the bottom 4 The depth (bottom buffer height) can be freely changed. Thereby, in the case of the glass container 110 which is not easily broken, the dent of the bottom part 4 is made shallow, while in the case of the fragile glass container 110, the dent of the bottom part 4 is deepened. The packaging container 1 which has an effect | action can be implement | achieved.

(Embodiment 2)
The present embodiment is different from the first embodiment in that the main body portion 42 has a rectangular cylindrical shape and the bottom portion 44 is recessed in a dormitory shape. Hereinafter, a description will be given focusing on differences from Embodiment 1.

  FIG. 8 is a perspective view schematically showing the packaging container 41 according to the present embodiment as viewed obliquely from below, and FIG. 9 is a development view of the packaging container 41. The packaging container 41 includes a rectangular cylindrical main body 42, a lid 43 that closes the upper opening of the main body 42, and a bottom 44 that closes the lower opening of the main body 42.

  The main body portion 42 includes a pair of side plates 46 and 48 (see FIG. 9) opposed to each other, a front plate 45 connected to the side plates 46 and 48 so as to be orthogonal to each other via folds 61 and 64, and a side. It has the face plates 46 and 48 and the back plate 47 (refer FIG. 9) connected so that it may orthogonally cross through the creases 62 and 63 (refer FIG. 10), respectively. The lid portion 43 includes an upper surface plate 49 provided continuously with the back plate 47, an insertion piece 49 a provided continuous with the upper surface plate 49, and flaps 46 a, 48 a respectively provided with a pair of side plates 46, 48. It is configured. The bottom portion 44 includes a first bottom plate 50, a second bottom plate 51, and a third bottom plate 52 that are connected to the front plate 45, the side plate 46, the back plate 47, and the side plate 48 via folds 69, 70, 71, and 72, respectively. And it has the 4th bottom plate 53, and as shown in FIG. It is to be noted that the depressions in the form of a dormitory are a pair of isosceles trapezoidal inclined surfaces in which the surfaces constituting the depressions are inclined so that the upper bases coincide with each other and move toward the lower base, and the pair of inclined surfaces. It means that it consists of a pair of isosceles triangle-shaped inclined surfaces in which the leg which makes V shape in the both ends of this, and its isosceles coincide.

−Development diagram−
In the developed view shown in FIG. 9, a rectangular front plate 45 is continuously provided on the left side of the rectangular side plate 46 via a folding line 61a, and a rectangular shape is provided on the left side of the front plate 45 via a folding line 64a. The side plate 48 is continuously provided, a rectangular back plate 47 is provided continuously on the left side of the side plate 48 via a fold line 63a, and an adhesive margin 47a is provided on the left side of the back plate 47 via a fold line 62a. Are connected. Further, flaps 46a and 48a are connected to the upper side of the side plate 46 and the side plate 48 via folding lines 66a and 68a, respectively. Further, a rectangular upper surface plate 49 is connected to the upper side of the back plate 47 via a fold line 67a, and an insertion piece 49a is connected to the upper side of the upper surface plate 49 via a fold line 65a.

  On the lower side of the side plate 46, an isosceles triangular second bottom plate main body 51a whose bottom is connected to the bottom of the side plate 46 via a folding line 70a, and a left side of the second bottom plate main body 51a. A second bottom plate 51 having an equal side and an adhesive margin portion 51b provided continuously through a cut and fold line 73a is provided. On the lower side of the front plate 45, a trapezoidal first bottom plate main body portion 50a whose lower bottom (long bottom) is connected to the bottom side of the front plate 45 via a folding line 69a, and a first bottom plate main body portion 50a. A first bottom plate 50 having three first engaging portions 50b provided at the left and right central portions and both end portions of the upper bottom (short bottom) is provided. Below the side plate 48, an isosceles triangular fourth bottom plate main body 53a whose bottom is connected to the bottom of the side plate 48 via a folding line 72a, and a left side of the fourth bottom plate main body 53a. A fourth bottom plate 53 having an equal side and an adhesive margin portion 53b provided continuously through a cut and fold line 74a is provided. Below the back plate 47, a trapezoidal third bottom plate main body 52a whose bottom (long bottom) is connected to the bottom of the back plate 47 via a folding line 71a, and a third bottom plate main body 52a. There is provided a third bottom plate 52 provided on the upper bottom (short bottom) and having two second engaging portions 52b fitted between the three first engaging portions 50b.

-Assembly procedure-
The packaging container 41 configured as described above is assembled in the same procedure as in the above embodiment. That is, the coated ball is punched in accordance with the development view of FIG. 9 and reversed so that the back surface of FIG. Then, the second bottom plate 51, the first bottom plate 50, the fourth bottom plate 53, and the third bottom plate 52 are folded on the side plates 46, the front plate 45, the side plate 48, and the back plate 47, respectively, by folding lines 70a, 69a, Fold each other along 72a and 71a.

  Next, the glue margin 51b and the glue margin 53b are respectively cut along the fold lines 73a and 74a so as to overlap the second bottom plate main body 51a and the fourth bottom plate main body 53a, respectively, and the glue margin 51b and the glue are obtained. An adhesive is applied to the inner side surface of the marginal part 53b.

  Next, the back plate 47 is valley-folded along the fold line 63a so as to overlap the side plate 48, and the fourth bottom plate 53 and the third bottom plate 52 are overlapped, so that the inner side surface of the adhesive margin 53b is the third bottom plate. After affixing on the outer surface of 52, an adhesive is apply | coated to the outer surface of the glue margin part 47a.

  Next, the side plate 46 is valley-folded along the fold line 61 a so as to overlap the front plate 45, and the second bottom plate 51 and the first bottom plate 50 are overlapped, so that the outer surface of the adhesive margin portion 47 a becomes the side plate 46. The inner surface of the adhesive margin 51b is attached to the outer surface of the first bottom plate 50, and the assembly of the packaging container 41 is completed.

−Structure of packaging container−
Similarly to the packaging container 1 of the first embodiment, the packaging container 41 assembled as described above can be deformed with a single touch from a flat folded state to a bottomed cylindrical shape that can accommodate a packaging object. It is configured as a bottom-lock type packaging container. Also in the present embodiment, the first and second bottom plates 50 and 51 are collectively referred to as a first bottom portion 44a, and the third and fourth bottom plates 52 and 53 are collectively referred to as a second bottom portion 44b.

  That is, the difference between the main body portion 42 and the main body portion 2 is only a rectangular tube shape or a square tube shape. In the main body portion 42, the fold lines 61 and 63 are closed so that the front plate 45 and the side plate 46 are separated. When a force is applied to the fold 61 and the fold 63 from the flat state where the back plate 47 and the side plate 48 overlap, the fold 61 and the fold 63 approach diagonally, and the fold 62 and the fold 64 become A rectangular cylindrical main body 42 is formed apart in the diagonal direction.

  The second bottom plate 51 has an isosceles triangular second bottom plate main body 51a and an adhesive margin 51b. The second bottom plate 51 has the same configuration as the second bottom plate 11 and a fourth bottom plate 53. Has an isosceles triangle-shaped fourth bottom plate main body 53a and adhesive margin 53b, and has the same configuration as the fourth bottom plate 13. Thus, the first bottom plate main body portion 50a and the third bottom plate main body portion 52a are obtained by extending the first bottom plate main body portion 10a and the third bottom plate main body portion 12a in the long side direction of the main body portion 42, respectively. As in the first embodiment, the margin portions 51b and 53b of the second bottom plate 51 and the fourth bottom plate 53 are pasted, respectively. Therefore, the bottom portion 44 is also deformed in the same manner as the bottom portion 4 as the main body portion 42 is deformed into a rectangular cylindrical shape.

  Specifically, as the closed folds 61 and 63 are opened, the closed folds 69, 70, 71, 72, 73, and 74 are opened, and the first bottom portion 44a and the second bottom portion 44b that have been folded are overlapped. Be expanded. In parallel with this, as the folds 62 and 64 are closed, the first bottom portion 44a and the second bottom portion 44b that have been separated into two parts approach in a diagonal direction. Thus, when the rectangular cylindrical main body portion 42 is formed, the upper bottom of the first bottom plate main body portion 50a and the upper bottom of the third bottom plate main body portion 52a come into contact with each other, and the same side of the second bottom plate main body portion 51a is formed. Is in contact with the outer surface of the third bottom plate 52, and the equal side of the fourth bottom plate main body 53a is in contact with the outer surface of the first bottom plate 50, thereby closing the lower opening of the main body 42. At this time, the two second engaging portions 52b of the third bottom plate 52 are fitted between the three first engaging portions 50b of the first bottom plate 50, so that the lock is applied, and the main body portion 42 has a rectangular cylindrical shape. And the state where the 1st bottom part 44a and the 2nd bottom part 44b were connected, and the lower opening of the main-body part 42 was obstruct | occluded by the bottom part 44 is maintained.

  However, the first bottom plate main body 50a and the third bottom plate main body 52a are obtained by extending the first bottom plate main body 10a and the third bottom plate main body 12a in the long side direction of the main body 42, respectively. Is hidden from the outside by the second and fourth bottom plate main body portions 51 a and 53 a, unlike the first embodiment, an isosceles trapezoidal portion appears on the outer surface of the bottom portion 44. Therefore, the bottom 44 is recessed in a dormitory shape, unlike the bottom 4 being recessed in a quadrangular pyramid shape.

  FIG. 10 is a view of the packaging container 41 as viewed from an oblique front. In FIG. 10, the front plate 45 and the lid 43 are not shown in order to make the drawing easier to see. As shown in FIG. 10, the packaging container 41 can accommodate a plurality of glass containers 110 by providing, for example, a partition plate 54 inside a rectangular cylindrical main body 42. And in the packaging container 41 of this embodiment, without providing a separate buffer structure with respect to each glass container 110, a plurality of glass containers 110 are separated from each other by a single bottom portion 44 that is recessed like a dormitory. Since it becomes possible to support above the lower end of 42, even if an impact acts on the lower end of the packaging container 41, breakage of the plurality of glass containers 110 can be suppressed with a simple structure.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In each said embodiment, although the packaging containers 1 and 41 of this invention were applied to the glass container 110, if it is a thing which may be broken when an impact acts on the lower end of not only this but the packaging containers 1 and 41, The packaging container 1, 41 of the present invention may be applied to any packaging object.

  In each of the above embodiments, the packaging containers 1 and 41 are formed using the coated balls. However, the present invention is not limited thereto, and the packaging containers may be formed using, for example, carton paper, cup base paper, cardboard paper, and the like. . Moreover, the packaging containers 1 and 41 are not limited to paper, For example, you may form a packaging container using a resin material.

  Furthermore, in each said embodiment, although the packaging containers 1 and 41 provided with the square cylindrical main-body parts 2 and 42 were demonstrated, it is not restricted to this, For example, as shown in FIG. Moreover, the packaging container 81 provided with the bottom part 84 recessed in a cone shape may be sufficient. The packaging container 81 includes a cylindrical main body portion 82 and a bottom portion 84 that closes an opening on the lower side of the main body portion 82, and the bottom portion 84 has an inclined surface that is inclined upward as it goes inward. In addition, it can be said that it is an embodiment of the packaging container in which the entire bottom part 84 (at least part) is recessed inward of the main body part 82.

  For example, as shown in FIG. 12, the packaging container 91 provided with the hexagonal cylindrical main-body part 92 and the bottom part 94 hollow in a hexagonal pyramid shape may be sufficient. The packaging container 91 includes a polygonal cylindrical main body 92 and a bottom 94 that closes an opening on the lower side of the main body 92, and the bottom 94 moves upward from the bottom of the main body 92 toward the inside. It can be said that it is an embodiment of a packaging container that has an inclined surface that is inclined toward the surface, and that the entire bottom portion 94 (at least a part) is recessed in a polygonal pyramid shape inward of the main body portion 92.

  Furthermore, for example, as shown in FIG. 13, the packaging container 101 may include a rectangular cylindrical main body 102 and a bottom 104 that is recessed in a truncated pyramid shape. Thus, the packaging container 101 in which the bottom 104 is not recessed in a conical shape also includes a polygonal cylindrical main body 102 and a bottom 104 that closes the lower opening of the main body 102, and the bottom 104 is One aspect of the packaging container that has an inclined surface that inclines upward as it goes inward from each bottom side of the main body portion 102, and the entire bottom portion 104 (at least a part) is recessed inward of the main body portion 102. It can be said.

  Also in the packaging containers 81, 91, and 101 described above, the glass container 110 is placed above the lower ends of the main body portions 82, 92, and 102 by the bottom portions 84, 94, and 104 that are recessed in a conical shape, a hexagonal pyramid shape, and a truncated pyramid shape, respectively. Therefore, even when an impact is applied to the lower ends of the packaging containers 81, 91, 101, the glass container 110 can be prevented from being damaged with a simple structure. In FIGS. 11 to 13, the lid is not shown in order to make the drawings easy to see.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, even when an impact is applied to the lower end of the packaging container, damage to the packaging object can be suppressed with a simple structure, which is extremely useful when applied to a packaging container for packaging a fragile object.

1, 41, 81, 91, 101 Packaging container 2, 42, 82, 92, 102 Main body part 4, 44, 84, 94, 104 Bottom part 4a, 44a First bottom part 4b, 44b Second bottom part 10b, 50b First engagement Joint part (engagement part)
12b, 52b Second engaging portion (engaging portion)

Claims (6)

A packaging container comprising a cylindrical main body and a bottom that closes the lower opening of the main body,
The bottom part has the inclined surface which inclines upwards so that it goes inside, and at least one part is dented inward of the main-body part, The packaging container characterized by the above-mentioned. In the packaging container according to claim 1,
The main body has a polygonal cylindrical shape,
The packaging container, wherein the inclined surface is inclined and extended from each bottom side of the main body. In the packaging container according to claim 2,
The packaging container is characterized in that the bottom portion is recessed in a polygonal pyramid shape. In the packaging container according to claim 3,
The main body has a square cylindrical shape,
The packaging container according to claim 1, wherein the bottom part is recessed in a quadrangular pyramid shape as the main body part is deformed into a square cylindrical shape from a state of being folded flat together with the main body part. In the packaging container according to claim 3,
The main body has a rectangular cylindrical shape,
The packaging container is characterized in that the bottom part is recessed in a dormitory shape as the main body part is deformed into a rectangular cylindrical shape from a state in which the bottom part is folded together with the main body part. In the packaging container according to claim 4 or 5,
In the state where the bottom portion is folded flat, the bottom portion is divided into first and second bottom portions respectively connected to two adjacent bottom sides of the main body portion, while the main body portion is in a rectangular tube shape. The first bottom portion and the second bottom portion are connected to each other,
The packaging container, wherein the first and second bottom portions are respectively provided with engaging portions that engage with each other when the main body portion has a rectangular tube shape.

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