JP7359587B2 - packaging box - Google Patents

Description

The present invention relates to a rectangular parallelepiped packaging box formed by folding a blank along crease lines.

Conventionally, items to be packaged such as bottles and cans are placed in an array on a blank sheet obtained by punching out a corrugated cardboard sheet, the blank sheet is folded along the crease lines to wrap the product, and the flaps are joined. A wraparound case is known in which a case is formed while packaging a product (for example, see Patent Document 1).

In general, in the case of wrap-around cases, the containers themselves are strong enough to store plastic bottles, beverage cans, etc., but when the cases are stacked up, the weight of the upper case causes dents at the bottom of the bottles, etc. in the upper case. A phenomenon occurs in which the top surface portion of the lower case corresponding to the cap portion of a bottle or the like of the lower case bites into the bottom surface portion of the upper case corresponding to the bottle. As a result, the distortion of the case increases by the amount of biting, and this distortion causes bulge (a phenomenon in which the central portion of the length surface bulges outward), which impairs the appearance of the case.

In the wraparound case described in Patent Document 1, the fold line at the boundary between the vertical plate and the flat plate is composed of one fold line portion and two parallel fold line portions. The parts with one fold line and the parts with two fold lines are provided alternately with the cut line in between, so as to correspond to the cans to be packaged. As the vertical plate and flat plate are bent along the fold lines, the portion between the two parallel fold lines becomes oblique along the outer periphery of the edge of the can.

According to this, when a stacked load is applied, the bending angle of the two parallel fold lines changes to absorb the deformation in the height direction, so that bulge can be suppressed.

Patent No. 4126201

However, according to the wraparound case of Patent Document 1 mentioned above, a hole is formed due to the cut at the boundary between one fold line and two parallel fold lines, resulting in poor airtightness. It is not possible to prevent the intrusion of fine dust, etc. In addition, since the holes formed by the above-mentioned cuts are formed with steps, they are likely to be caught by external objects, and there is a risk that cracks or breaks may occur.

In view of the problems of the prior art, an object of the present invention is to provide a packaging box that can suppress body bulge without providing a perforated portion.

By folding a corrugated cardboard blank on which a crease line is formed along the crease line, the present invention forms a pair of longitudinal surfaces that stand up opposite each other, and a pair of longitudinal surfaces that face each other in a direction orthogonal to both longitudinal surfaces. It is a packaging box formed into a rectangular parallelepiped, having a width surface of , and a top surface and a bottom surface that face each other in the vertical direction.

A first aspect of the present invention includes a plurality of upper first compound fold line portions each consisting of two fold lines formed in parallel on both sides along the boundary line between the longitudinal surface and the top surface; two folds formed in parallel on both sides along the boundary line between the length surface and the top surface with a phase shift in a direction perpendicular to the two fold lines of the upper first compound fold line portion; A plurality of upper second compound fold line portions consisting of eye lines are provided alternately, and by bending two fold lines of the upper first compound fold line portion, a boundary portion between the longitudinal surface and the top surface is formed. an upper second inclined corner portion formed at a boundary portion between the longitudinal surface and the top surface by two fold lines of the upper first inclined corner portion formed and the upper second compound fold line portion; are characterized in that they are provided so as to be inclined at different angles with respect to the longitudinal plane.

According to the first aspect of the present invention, when the packaging boxes are stacked, the stacking load applied vertically to the length plane is applied to the upper part inclined at different angles with respect to the length plane. The first beveled corner and the second upper beveled corner cancel each other out. Thereby, it is possible to suppress the bulge caused by the stacking load applied to the length surface.

In the first aspect of the present invention, a single fold line extending on a boundary line between the longitudinal surface and the top surface is provided at both longitudinal ends of the upper edge of the longitudinal surface. It is preferable.

According to this, when the top surface is folded in the horizontal direction with respect to the length surface during box manufacturing work, the upper first compound fold line portion is guided by a single crease line at both ends of the upper edge of the length surface. and the upper second composite fold line portion can be smoothly bent.

A second aspect of the present invention includes a plurality of lower first compound fold line portions each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface; From two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface and shifted in phase in a direction perpendicular to the two fold lines of the first compound fold line portion. A plurality of lower second compound fold line portions are provided alternately, and are formed at the boundary portion between the longitudinal surface and the bottom surface by bending the two fold lines of the lower first compound fold line portion. The lower first inclined corner portion and the lower second inclined corner portion formed at the boundary between the length surface and the bottom surface by the two fold lines of the lower second compound fold line portion are mutually , characterized in that they are provided so as to be inclined at different angles with respect to the length plane.

According to the second aspect of the present invention, when the packaging boxes are stacked, the stacking load applied in the vertical direction on the length plane is applied to the lower part inclined at different angles with respect to the length plane. The first beveled corner and the second lower beveled corner cancel each other out. Thereby, it is possible to suppress the bulge caused by the stacking load applied to the length surface.

In a second aspect of the present invention, a single fold line extending on a boundary line between the length surface and the bottom surface is provided at both longitudinal ends of the lower edge of the length surface. is preferred.

According to this, when the longitudinal surface is bent and raised against the bottom surface during box manufacturing work, the lower first composite fold line and the lower portion are guided by a single crease line at both ends of the upper edge of the longitudinal surface. Bending with the second compound fold line portion can be performed smoothly.

A third aspect of the present invention includes a plurality of upper first compound fold line portions each consisting of two fold lines formed in parallel on both sides along the boundary line between the longitudinal surface and the top surface; two folds formed in parallel on both sides along the boundary line between the length surface and the top surface with a phase shift in a direction perpendicular to the two fold lines of the upper first compound fold line portion; A plurality of upper second compound fold line portions consisting of eye lines are provided alternately, and by bending two fold lines of the upper first compound fold line portion, a boundary portion between the longitudinal surface and the top surface is formed. an upper second inclined corner portion formed at a boundary portion between the longitudinal surface and the top surface by two fold lines of the upper first inclined corner portion formed and the upper second compound fold line portion; are provided so as to be inclined at different angles with respect to the longitudinal surface, and are formed from two fold lines parallel to each other on both sides along the boundary line between the longitudinal surface and the bottom surface. along the boundary line between the length surface and the bottom surface with a phase shift in a direction orthogonal to the two fold lines of the lower first compound fold line portion. A plurality of lower second compound fold line parts each consisting of two fold lines formed in parallel on both sides are provided alternately, and by bending the two fold lines of the lower first compound fold line part, The boundary portion between the length surface and the bottom surface is formed by two fold lines, the lower first inclined corner portion formed at the boundary portion between the length surface and the bottom surface, and the lower second compound fold line portion. The formed lower second inclined corner parts are provided so as to be inclined at different angles with respect to the longitudinal plane.

According to the third aspect of the present invention, when the packaging boxes are stacked, the stacking load applied in the vertical direction on the length surface is applied to the upper first inclined corner portion and the upper second inclined corner portion. At the same time, they are offset by the lower first inclined corner part and the lower second inclined corner part. Thereby, it is possible to suppress the bulge caused by the stacking load applied to the length surface.

At this time, the inclination angle with respect to the length plane of the upper first inclined corner part is equal to the inclination angle with respect to the length plane of the lower first inclined corner part, and the inclination angle with respect to the length plane of the upper second inclined corner part The angle of inclination with respect to the length of the lower second inclined corner is equal to the angle of inclination with respect to the length plane of the lower second inclined corner, the first upper inclined corner is located directly above the second lower inclined corner, and the upper first inclined corner is located directly above the second lower inclined corner; Preferably, the second inclined corner portion is located directly above the lower first inclined corner portion.

According to this, the stacking load applied in the vertical direction to the length surface is offset by the upper first inclined corner portion on the upper edge side of the length surface and the lower second inclined corner portion on the lower edge side, It is also offset by the upper second inclined corner part on the upper edge side of the length surface and the lower first inclined corner part on the lower edge side. Therefore, the bulge caused by the stacking load applied to the length can be more effectively suppressed.

Note that "equal to the inclination angle" here does not mean that the angles match without error; for example, if the inclination angle with respect to the length plane of the upper first inclination corner part is large (or small), In the case where the inclination angle with respect to the length plane of the slanted corner part is small (or large), the inclination angle with respect to the length plane of the lower first slanted corner part is large (or small), and the second lower slanted corner angle This means that the angle of inclination with respect to the length plane of the part is small (or large), and the angles formed are equal in magnitude.

Numerically speaking, about plus or minus 5 degrees is within the range of "equal to the inclination angle".

Further, in a third aspect of the present invention, a single fold line extending on a boundary line between the length surface and the top surface is provided at both ends in the length direction of the upper edge of the length surface. It is preferable that a single crease line extending on a boundary line between the length surface and the bottom surface is provided at both ends in the length direction of the lower edge of the length surface.

As a result, when the longitudinal plane is raised up against the bottom surface during box manufacturing work, the lower first compound fold line and the lower second compound fold are guided by the single fold line at both ends of the lower edge of the longitudinal plane. In addition to smooth progress of bending with the eye-level part, when the top surface is folded horizontally with respect to the length surface, the upper first compound is guided by a single crease line at both ends of the upper edge of the length surface. The folding between the fold line part and the upper second compound fold line part progresses smoothly, and the box manufacturing work becomes easier.

FIG. 1 is a plan view of an assembled packaging box according to an embodiment of the present invention. FIG. 2 is a side view showing the length of the packaging box of the present embodiment in an assembled state. FIG. 2 is a side view showing the width of the packaging box of the present embodiment in an assembled state. FIG. 3 is a bottom view of the packaging box of the present embodiment in an assembled state. FIG. 4 is a developed view of the packaging box of this embodiment (Example 4). FIG. 6A is an explanatory diagram of an upper first composite fold line part and an upper second composite fold line part, and FIG. 6B is an explanatory diagram of a lower first composite fold line part and a lower second composite fold line part. FIG. 2 is an explanatory cross-sectional view of the main parts of the packaging box of this embodiment. FIG. 4 is an explanatory cross-sectional view of other main parts of the packaging box of the present embodiment. FIG. 6 is a developed view of a packaging box of another embodiment (Example 5). FIG. 3 is a developed view of a packaging box of another embodiment (Example 1). FIG. 6 is a developed view of a packaging box of another embodiment (Example 2). FIG. 3 is a developed view of a packaging box of another embodiment (Example 3).

An embodiment of the present invention will be described using the drawings. The packaging box of this embodiment, each side of which is shown in FIGS. 1 to 4, is a so-called wraparound case, and is a cardboard box formed into a rectangular parallelepiped by folding a blank sheet 1 shown in FIG. 5 at a predetermined position. The case is made of

The packaging box has a rectangular top surface 2 when viewed from above in FIG. 1, a length surface 3 shown in FIG. It has a width surface 4 shown in FIG. 3 and a bottom surface 5 that faces the top surface 2 and closes the bottom.

Note that the reference numeral 6 shown in FIG. 2 is a tear strip for opening by liner cutting, and the reference numeral 7 shown in FIG. 3 is a hand hole for inserting a hand when holding the packaging box.

FIG. 5 is a developed view of the packaging box, showing the blank sheet 1 before being made into a box. As shown in FIG. 5, the blank sheet 1 includes a bottom plate 51 serving as a bottom surface 5, a top plate 21 serving as a top surface 2 facing the bottom surface 5, and a pair of longitudinal surfaces 3 facing each other in an upright state. side plates 31, and an adhesive piece 22 for connecting one side plate 31 and the top plate 21. The adhesive piece 22 is adhered to the top plate 21 and constitutes a part of the top surface 2.

Further, the blank sheet 1 includes outer flaps 41 connected to both ends of the bottom plate 51 and both ends of the top plate 21, and inner flaps 42 connected to both ends of each side plate 31. The outer flap 41 is adhered to the outer surface of the inner flap 42 to form the width surface 4.

At the boundary between the top plate 21 and the side plate 31, a plurality of upper first compound fold line parts 10 and a plurality of upper second compound fold line parts 11 are formed alternately along the upper edge of the side plate 31. . The upper first compound fold line section 10 consists of two parallel fold lines (upper side fold line 10a and lower side fold line 10b), and the upper second compound fold line section 11 consists of two parallel fold lines (upper side fold line 10a and lower side fold line 10b). It consists of fold lines of the book (top fold line 11a and bottom fold line 11b).

As shown in FIG. 6, the upper first composite fold line part 10 and the upper second composite fold line part 11 are formed with a phase shift in a direction orthogonal to the upper fold lines 10a, 11a and the lower fold lines 10b, 11b. has been done.

Moreover, the upper first compound fold line part 10 and the upper second compound fold line part 11 are continuous via the connecting compound fold line part 12 . That is, as shown in FIG. 6, the connecting compound fold line portion 12 is composed of three fold lines: an upper connecting fold line 12a, a lower connecting fold line 12b, and an intermediate connecting fold line 12c.

The upper side connecting fold line 12a connects the upper side fold line 10a of the upper first compound fold line part 10 and the upper side fold line 11a of the upper second compound fold line part 11. The lower side connecting fold line 12b connects the lower side fold line 10b of the upper first compound fold line part 10 and the lower side fold line 11b of the upper second compound fold line part 11. Further, the intermediate connecting fold line 12c connects one end of the upper side connecting fold line and one end of the lower side connecting fold line, thereby connecting the upper first composite fold line part 10 and the upper second composite fold line part 11. are visually recognized as a plurality of hexagonal shapes connected in a band shape.

Similarly, a plurality of lower first compound fold line parts 13 and a plurality of lower second compound fold line parts 14 are formed alternately along the lower edge of the side plate 31 at the boundary between the bottom plate 51 and the side plate 31. has been done. The lower first compound fold line part 13 consists of two parallel fold lines (upper side fold line 13a and lower side fold line 13b), and the lower second compound fold line part 14 consists of two fold lines formed in parallel. It consists of fold lines of the book (top fold line 14a and bottom fold line 14b).

As shown in FIG. 6, the lower first composite fold line part 13 and the lower second composite fold line part 14 are formed with a phase shift in a direction orthogonal to the upper fold lines 13a, 14a and the lower fold lines 13b, 14b. has been done.

Further, the lower first compound fold line portion 13 and the lower second compound fold line portion 14 are continuous via the connecting compound fold line portion 15 . That is, as shown in FIG. 6, the connecting compound fold line portion 15 is composed of three fold lines: an upper connecting fold line 15a, a lower connecting fold line 15b, and an intermediate connecting fold line 15c.

The upper side connecting fold line 15a connects the upper side fold line 13a of the lower first compound fold line part 13 and the upper side fold line 14a of the lower second compound fold line part 14. The lower side connecting fold line 15b connects the lower side fold line 13b of the lower first compound fold line part 13 and the lower side fold line 14b of the lower second compound fold line part 14. Further, the intermediate connecting fold line 15c connects one end of the upper side connecting fold line and one end of the lower side connecting fold line, thereby connecting the lower first composite fold line part 13 and the lower second composite fold line part 14. are visually recognized as a plurality of hexagonal shapes connected in a band shape.

When the packaging box is assembled from the blank sheet 1, as shown in FIG. A second inclined corner portion 17 is formed. Similarly, as shown in FIG. 8, the upper second compound fold line part 11 forms the upper second inclined corner part 18, and the lower first compound fold line part 13 forms the lower first inclined corner part 19. Form.

Further, as shown in FIGS. 7 and 8, the upper first inclined corner part 16 and the lower first inclined corner part 19 have the same inclination angle with respect to the length surface 3, and the upper second inclined corner part 18 and the lower second inclined corner portion 17 have the same inclination angle with respect to the length surface 3.

Furthermore, the inclination angle of the upper first inclined corner part 16 with respect to the length surface 3 is smaller than the inclination angle of the upper second inclined corner part 18 with respect to the length surface 3, and the inclination angle of the lower first inclined corner part 16 with respect to the length surface 3 is smaller. The angle of inclination of the portion 19 is smaller than the angle of inclination of the lower second inclined corner portion 17 with respect to the length surface 3.

As shown in FIG. 7, the upper first inclined corner part 16 is located directly above the lower second inclined corner part 17, and as shown in FIG. 8, the upper second inclined corner part 18 is It is located directly above the lower first inclined corner portion 19 .

When a plurality of packaging boxes having the above configuration are stacked and a stacking load is applied to the longitudinal surface 3 in the vertical direction, the upper first inclined corner portion 16 and the upper The second angled corner 18 distributes the load outwardly and inwardly. At this time, slight wave deformation occurs on the length surface 3 due to the upper first inclined corner part 16 and the upper second inclined corner part 18, and the strength in the vertical direction of the length surface 3 increases. do. This suppresses trunk bulge.

At the same time, at the lower edge of the length surface 3, the lower first inclined corner part 19 and the lower second inclined corner part 17 distribute the load outwardly and inwardly. At this time, slight wave deformation occurs in the length surface 3 due to the lower first inclined corner part 19 and the lower second inclined corner part 17, but the upper first inclined corner part 16 Since the upper second inclined corner part 18 is located directly above the second inclined corner part 17 and the lower first inclined corner part 19, the upper edge side and the lower edge side of the length surface 3 are Since the ripple directions are opposite, the deformation is canceled out, and the ripple deformation is not visually recognized from the outside.

In this manner, the packaging box of the present embodiment can maintain a good appearance by suppressing body bulge without causing changes in appearance due to increased strength of the length surface 3.

In addition, in this embodiment, the upper first compound fold line part 10 and the upper second compound fold line part 11 are formed alternately over the entire length of the upper edge of the length plane 3, and the lower edge of the length plane 3 is Although the lower first compound fold line part 13 and the lower second compound fold line part 14 are alternately formed over the entire length, as shown in FIG. A pair of upper boundary fold lines 8 (single fold lines) may be provided at both longitudinal ends of the edge. Furthermore, a pair of lower boundary fold lines 9 (single fold line) may be provided at both ends of the lower edge of the length surface 3 in the length direction.

According to this, when the length face 3 (side plate 31) is raised up against the bottom face 5 (bottom plate 51) during box manufacturing work, the lower boundary fold line 9 at both ends of the lower edge of the length face 3 guides the length face 3 (side plate 31). The bending between the lower first compound fold line part 13 and the lower second compound fold line part 14 progresses smoothly, and when the top surface 2 is folded horizontally with respect to the length plane 3, the length plane 3 Guided by the upper boundary fold line 8 at both ends of the upper edge, the folding between the upper first compound fold line part 10 and the upper second compound fold line part 11 progresses smoothly, making the box manufacturing work even easier.

Further, in this embodiment, in the length plane 3, the upper first inclined corner part 16 is arranged directly above the lower second inclined corner part 17, and the upper second inclined corner part 18 is arranged in the lower first inclined corner part. By arranging it directly above the corner 19, when the longitudinal surface 3 receives a stacking load, the undulation directions are reversed on the upper edge side and the lower edge side to cancel each other out, thereby increasing the strength of the longitudinal surface 3. This shows a method that does not cause any changes in appearance due to the increase.

On the other hand, in the length plane 3, the upper first inclined corner part 16 is arranged directly above the lower first inclined corner part 19, and the upper second inclined corner part 18 is arranged directly above the lower second inclined corner part 17. It is also possible to place it directly above the . According to this, when the longitudinal surface 3 receives a stacked load, the waving direction is the same on the upper edge side and the lower edge side, so the waving deformation of the longitudinal surface 3 becomes relatively large, but it is sufficient. Since sufficient strength is ensured, body bulge can be suppressed similarly to the above embodiment.

Furthermore, in this embodiment, the first inclined corner portions 16, 19 and the second inclined corner portions 17, 18 are formed on both the upper edge and the lower edge of the length surface 3. In addition to this, although not shown, the first inclined corner portion and the second inclined corner portion may be formed only on either the upper edge or the lower edge of the length surface. In this case, although the strength in the longitudinal direction is slightly reduced, the effect of suppressing trunk bulge can be sufficiently obtained.

Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples and the like.

[Example 1]
A packaging box was prepared by wrapping 24 500 mL PET tubes (6 vertically x 4 horizontally) using the blank sheet 1 in the unfolded state shown in FIG. 10. This packaging box has only an upper first compound fold line section 10 and an upper second compound fold line section 11. The upper first composite fold line part 10 and the upper second composite fold line part 11 are formed in a total of six pieces, three each corresponding to the diameter of the beer can.

A load was applied to the packaging box using a compression tester from the top surface 2 to the bottom surface 5 of the packaging box until it reached its compression limit.

Then, the distance from the lower end edge of the length surface 3 to the most outwardly swollen portion at this time was measured as the maximum trunk bulge. In addition, it was visually confirmed whether or not the longitudinal surface 3 was bent in the longitudinal direction and vertical wrinkles were generated due to this load. In addition, it was visually confirmed whether buckling occurred in the outer flap 41 on the side where the hand hole 7 was formed (hereinafter simply referred to as "upper outer flap") due to this load. Furthermore, the ease of folding along the fold lines during box-making work (ease of box-making) was confirmed.

[Example 2]
A packaging box having the same configuration as in Example 1 above was produced except that the blank sheet 1 shown in FIG. Ease of box manufacturing was confirmed. This packaging box has only a lower first compound fold line section 13 and a lower second compound fold line section 14.

[Example 3]
A packaging box having the same configuration as in Example 1 above was produced except that the blank sheet 1 shown in FIG. Ease of box manufacturing was confirmed. In this packaging box, the upper first compound fold line part 10 and the upper second compound fold line part 11 and the lower first compound fold line part 13 and the lower second compound fold line part 14 are cut in a line with a tear strip 6 in between. Since they are formed symmetrically, the upper first inclined corner part 16 is located directly above the lower first inclined corner part 19, and the upper second inclined corner part 18 is located directly above the lower second inclined corner part 17. Located in

[Example 4]
A packaging box having the same configuration as in Example 1 above was produced except that the blank sheet 1 shown in FIG. Ease of box manufacturing was confirmed. As shown in FIGS. 7 and 8, in this packaging box, the first upper inclined corner part 16 is located directly above the lower second inclined corner part 17, and the upper second inclined corner part 18 is located directly above the lower first inclined corner part 17. It is located directly above the inclined corner portion 19.

[Example 5]
A packaging box having the same configuration as in Example 1 above was produced except that the blank sheet 1 shown in FIG. Ease of box manufacturing was confirmed.

This packaging box has two upper first composite fold line parts 10 and two lower second composite fold line parts 14, and three each of upper second composite fold line parts 11 and lower first composite fold line parts 13. The upper boundary fold line 8 or the lower boundary fold line 9 is connected to both ends thereof. The positions and lengths of the upper first compound fold line section 10, the upper second compound fold line section 11, the lower first compound fold line section 13, and the lower second compound fold line section 14 are determined according to the diameter of the canned beer. Not compatible.

Further, in this packaging box, similarly to the fourth embodiment, the upper first inclined corner part 16 is located directly above the lower second inclined corner part 17, and the upper second inclined corner part 18 is located directly above the lower first inclined corner part 17. It is located directly above the corner portion 19.

[Comparative example 1]
The upper first compound fold line part 10, the upper second compound fold line part 11, the lower first compound fold line part 13, and the lower second compound fold line part 14 are removed from the blank sheet 1 shown in FIGS. 5 and 9. Using an ordinary blank sheet 1, a packaging box having the same structure as in Example 1 was produced, and the same methods as in Example 1 were used to determine the maximum body bulge, the presence or absence of vertical wrinkles, the presence or absence of buckling, and the manufacturing process. Ease of packaging was confirmed.

The test results for the packaging boxes of Examples 1 to 5 and Comparative Example 1 are shown in Table 1.

As is clear from the test results, it was found that in Examples 1 to 5, body bulge was suppressed compared to the comparative example.

In addition, since the maximum body bulge in Examples 3 to 5 was suppressed compared to Examples 1 and 2, it was found that it is preferable to provide the compound fold line portion on both the upper and lower edges of the length surface. Ta.

Further, since the vertical wrinkles in Examples 4 and 5 are suppressed compared to Example 3, the upper first compound fold line part 10, the upper second compound fold line part 11, and the lower first compound fold line part 13 and the lower second composite fold line part 14 are preferably formed asymmetrically with the tearing band 6 in between.

Similarly, in Examples 4 and 5, buckling of the upper outer flap 41 is prevented compared to Example 3, so that the upper first compound fold line part 10, the upper second compound fold line part 11, and the lower part It has been found that it is preferable that the first composite fold line part 13 and the lower second composite fold line part 14 be formed asymmetrically with the tearing band 6 interposed therebetween.

Furthermore, compared to Examples 1 to 4, Example 5 has improved ease of box manufacturing, that is, ease of bending when folding the top and bottom surfaces with respect to the length surface. It has been found that it is preferable that a single crease line be formed at both ends of the boundary line with the top surface or the bottom surface.

1...Blank sheet (blank), 2...Top surface, 3...Length surface, 4...Width surface, 5...Bottom surface, 8...Top boundary crease line (single crease line), 9...Bottom boundary crease line (single ), 10... Upper first compound fold line part, 11... Upper second compound fold line part, 13... Lower first compound fold line part, 14... Lower second compound fold line part, 16... Upper first compound fold line part. Slanted corner part, 17... Lower second inclined corner part, 18... Upper second inclined corner part, 19... Lower first inclined corner part.

Claims (7)

By folding a cardboard blank on which a crease line is formed along the crease line, a pair of length surfaces that stand up opposite each other, and a pair of width surfaces that oppose each other in a direction perpendicular to both length surfaces, A packaging box formed into a rectangular parallelepiped having a top surface and a bottom surface facing each other in the vertical direction,
A plurality of upper first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the top surface, and two of the upper first compound fold line parts. A plurality of upper second composites consisting of two fold lines formed parallel to each other on both sides along the boundary line between the length surface and the top surface and shifted in phase in a direction perpendicular to the fold line of the book. The fold line portions are provided alternately,
When the top surface is folded in a direction perpendicular to the length surface during box manufacturing work, the two fold lines of the upper first compound fold line portion are bent , so that the length surface and the top surface are bent. Two crease lines, the upper first inclined corner formed at the boundary with the surface and the upper second compound fold line , are bent to form the boundary between the longitudinal surface and the top surface. A packaging box characterized in that the formed upper second inclined corner portions are provided so as to be inclined at different angles with respect to the longitudinal plane. The packaging box according to claim 1,
The upper first compound fold line part and the upper second compound fold line part are continuous via a connecting compound fold line part,
The connecting compound fold line portion is composed of three fold lines: an upper side connecting fold line, a lower side connecting fold line, and an intermediate connecting fold line,
The upper side connecting crease line connects the upper fold line of the upper first compound fold line section and the upper fold line of the upper second compound fold line section, and the lower side connecting fold line connects the upper fold line of the upper first compound fold line section and the upper fold line of the upper second compound fold line section. A lower fold line of the compound fold line part and a lower fold line of the upper second compound fold line part are connected, and the middle connecting fold line connects one end of the upper side connecting fold line and the lower side connecting fold line. A packaging box characterized in that it is connected to one end of the packaging box. By folding a cardboard blank on which a crease line is formed along the crease line, a pair of length surfaces that stand up opposite each other, and a pair of width surfaces that oppose each other in a direction perpendicular to both length surfaces, A packaging box formed into a rectangular parallelepiped having a top surface and a bottom surface facing each other in the vertical direction,
A plurality of lower first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface, and two lower first compound fold line parts. a plurality of lower second compound fold lines consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface with a phase shift in a direction perpendicular to the fold line; sections are provided alternately,
When the longitudinal surface is bent in a direction perpendicular to the bottom surface in the box manufacturing operation, the two fold lines of the lower first compound fold line portion are bent , so that the longitudinal surface and the bottom surface are bent. is formed at the boundary between the length surface and the bottom surface by bending two fold lines, the lower first inclined corner formed at the boundary and the lower second compound fold line. A packaging box characterized in that the lower second inclined corner portions are provided so as to be inclined at different angles with respect to the longitudinal plane. The packaging box according to claim 3,
The lower first compound fold line part and the lower second compound fold line part are continuous via another connecting compound fold line part,
The other connecting compound fold line portion is constituted by three fold lines: another upper side connecting fold line, another lower side connecting fold line, and another intermediate connecting fold line,
The other upper side connecting crease line connects the upper fold line of the lower first compound fold line section and the upper fold line of the lower second compound fold line section, and the other lower side connecting fold line is The lower fold line of the lower first composite fold line part and the lower fold line of the lower second composite fold line part are connected, and the other intermediate connecting fold line is connected to the other upper side connecting fold line. A packaging box characterized in that one end of the packaging box is connected to one end of the other lower side connecting fold line . By folding a cardboard blank on which a crease line is formed along the crease line, a pair of length surfaces that stand up opposite each other, and a pair of width surfaces that oppose each other in a direction perpendicular to both length surfaces, A packaging box formed into a rectangular parallelepiped having a top surface and a bottom surface facing each other in the vertical direction,
A plurality of upper first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the top surface, and two of the upper first compound fold line parts. A plurality of upper second composites consisting of two fold lines formed parallel to each other on both sides along the boundary line between the length surface and the top surface and shifted in phase in a direction perpendicular to the fold line of the book. The fold line portions are provided alternately,
When the top surface is folded in a direction perpendicular to the length surface during box manufacturing work, the two fold lines of the upper first compound fold line portion are bent , so that the length surface and the top surface are bent. Two crease lines, the upper first inclined corner formed at the boundary with the surface and the upper second compound fold line , are bent to form the boundary between the longitudinal surface and the top surface. The formed upper second inclined corner portions are provided so as to be inclined at different angles with respect to the longitudinal plane,
A plurality of lower first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface, and two lower first compound fold line parts. a plurality of lower second compound fold lines consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface with a phase shift in a direction perpendicular to the fold line; sections are provided alternately,
When the longitudinal surface is bent in a direction perpendicular to the bottom surface in the box manufacturing operation, the two fold lines of the lower first compound fold line portion are bent , so that the longitudinal surface and the bottom surface are bent. is formed at the boundary between the length surface and the bottom surface by bending two fold lines, the lower first inclined corner formed at the boundary and the lower second compound fold line. A packaging box characterized in that the lower second inclined corner portions are provided so as to be inclined at different angles with respect to the longitudinal plane. By folding a cardboard blank on which a crease line is formed along the crease line, a pair of length surfaces that stand up opposite each other, and a pair of width surfaces that oppose each other in a direction perpendicular to both length surfaces, A packaging box formed into a rectangular parallelepiped having a top surface and a bottom surface facing each other in the vertical direction,
A plurality of upper first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the top surface, and two of the upper first compound fold line parts. A plurality of upper second composites consisting of two fold lines formed parallel to each other on both sides along the boundary line between the length surface and the top surface and shifted in phase in a direction perpendicular to the fold line of the book. The fold line portions are provided alternately,
an upper first inclined corner portion formed at a boundary portion between the longitudinal surface and the top surface by bending two fold lines of the upper first compound fold line portion; and the upper second compound fold line. The upper second inclined corner portions formed at the boundary between the longitudinal surface and the top surface by two fold lines of the upper portion are provided so as to be inclined at different angles with respect to the longitudinal surface. has been
A plurality of lower first compound fold line parts each consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface, and two lower first compound fold line parts. a plurality of lower second compound fold lines consisting of two fold lines formed in parallel on both sides along the boundary line between the length surface and the bottom surface with a phase shift in a direction perpendicular to the fold line; sections are provided alternately,
A boundary portion between the length surface and the bottom surface by two fold lines: a lower first inclined corner portion formed at the boundary portion between the length surface and the bottom surface and the lower second compound fold line portion. The lower second inclined corner portions formed in the lower second inclined corner portions are provided so as to be inclined at different angles with respect to the longitudinal plane ,
The angle of inclination of the upper first inclined corner with respect to the length plane is equal to the inclination angle of the lower first inclined corner with respect to the length plane,
The inclination angle of the upper second inclined corner with respect to the length plane is equal to the inclination angle of the lower second inclined corner with respect to the length plane,
The upper first inclined corner portion is located directly above the lower second inclined corner portion,
The packaging box is characterized in that the second upper inclined corner portion is located directly above the first lower inclined corner portion. The packaging box according to claim 5,
The upper first compound fold line part and the upper second compound fold line part are continuous via a connecting compound fold line part,
The connecting compound fold line portion is composed of three fold lines: an upper side connecting fold line, a lower side connecting fold line, and an intermediate connecting fold line,
The upper side connecting crease line connects the upper fold line of the upper first compound fold line section and the upper fold line of the upper second compound fold line section, and the lower side connecting fold line connects the upper fold line of the upper first compound fold line section and the upper fold line of the upper second compound fold line section. A lower fold line of the compound fold line part and a lower fold line of the upper second compound fold line part are connected, and the middle connecting fold line connects one end of the upper side connecting fold line and the lower side connecting fold line. is connected to one end of
The lower first compound fold line part and the lower second compound fold line part are continuous via another connecting compound fold line part,
The other connecting compound fold line portion is constituted by three fold lines: another upper side connecting fold line, another lower side connecting fold line, and another intermediate connecting fold line,
The other upper side connecting crease line connects the upper fold line of the lower first compound fold line section and the upper fold line of the lower second compound fold line section, and the other lower side connecting fold line is The lower fold line of the lower first composite fold line part and the lower fold line of the lower second composite fold line part are connected, and the other intermediate connecting fold line is connected to the other upper side connecting fold line. A packaging box characterized in that one end of the packaging box is connected to one end of the other lower side connecting fold line .

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