Packing box

Abstract

To provide a packaging box which can be opened by pulling up an adhesive sheet from a packaging box body, and which makes it easy to pull up the adhesive sheet and therefore can be easily opened even with a small force.SOLUTION: A packaging box of the invention is composed of a packaging box body A10 having an opening area A101 that opens across a top board A11 or a top board and a front board A12, and an adhesive sheet A20 to which an adhesive-applied area A201 adheres surrounding the opening area. The opening area is surrounded by a planned breaking line A10b and a planned folding line A10a, and the opening area can be opened by pulling it in a direction in which the planned folding line serves as an open end. The planned breaking line A10b has diagonally extending lines A10b2 and A10b4 extending in the direction diagonally crossing the opening direction at the opening start end, and the angle between the direction A10b3' perpendicular to the opening direction α and the diagonally extending lines A10b2 and A10b4 is set to 15 degrees or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging box that is made up of a packaging box body and an adhesive sheet adhered to the packaging box body, and that can be repeatedly opened and sealed. [Background technology]

[0002] For example, a packaging box (paper box) in which an opening area is provided on the top panel of a paper packaging box body (paper box body) and an adhesive sheet is attached to the outer surface of the packaging box body surrounding this opening area is well known and is described, for example, in Patent Document 1.

[0003] In this paper box, the adhesive sheet is a plastic sheet coated with a pressure-sensitive adhesive layer, and is adhered to the outer surface of the paper box body by the pressure-sensitive adhesive layer. When the adhesive sheet is pulled up by pinching the leading edge, the adhesive sheet peels off from the paper box body in the area outside the opening area and is pulled up while still adhering to the opening area, rotating around the edge of the top panel side of the opening area to open it. At this time, the paper box body and the adhesive sheet are folded as if they were one piece at the edge.

[0004] The adhesive layer described above uses an adhesive that can be re-adhered after being peeled off from the paper box body, so this packaging box can be opened and resealed many times. Moreover, even after opening, the paper box body and the adhesive sheet are fixed in position at the edge of the top panel in the opening area, so there is no misalignment when resealing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3938998 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a packaging box that is opened by pulling up an adhesive sheet from the packaging box body, in which the adhesive sheet can be easily pulled up and therefore can be easily opened with a small force. [Means for solving the problem]

[0007] That is, the invention described in claim 1 is a packaging box comprising a packaging box body and an adhesive sheet adhered to the packaging box body, The packaging box body has a top panel and a front panel adjacent thereto, and an opening area that opens on the top panel or an opening area that opens across the top panel and the front panel is provided, The opening area is surrounded by the planned breaking line and the planned folding line, On the other hand, the adhesive sheet has an adhesive applied to a part or the entire surface thereof to form an adhesive application area, and this adhesive application area is adhered to the outer surface of the packaging box body, surrounding the opening area, This adhesive sheet has one end serving as an opening start end and the planned folding line of the packaging box main body serving as an opening end, and is configured so that by pulling the adhesive sheet in the opening direction, which is the direction from the opening start end toward the opening end, it breaks along the planned breaking line and the opening region of the packaging box main body can be opened, the predetermined tear line has an obliquely extending line extending in a direction obliquely intersecting the opening direction at the opening start end, The angle between the direction perpendicular to the opening direction and the oblique extending line is 15 degrees or more. This is a packaging box.

[0008] The invention described in claim 2 is a packaging box comprising a packaging box body and an adhesive sheet adhered to the packaging box body, The packaging box body has a top panel and a front panel adjacent thereto, and an opening area that opens on the top panel or an opening area that opens across the top panel and the front panel is provided, The opening area is surrounded by the planned breaking line and the planned folding line, On the other hand, the adhesive sheet has an adhesive applied to a part or the entire surface thereof to form an adhesive application area, and this adhesive application area is adhered to the outer surface of the packaging box body, surrounding the opening area, This adhesive sheet has one end serving as an opening start end and the planned folding line of the packaging box main body serving as an opening end, and is configured so that by pulling the adhesive sheet in the opening direction, which is the direction from the opening start end toward the opening end, it breaks along the planned breaking line and the opening region of the packaging box main body can be opened, the adhesive application area has an oblique crossing side extending in a direction obliquely intersecting the opening direction at the opening start end, The packaging box is characterized in that the angle between the direction perpendicular to the opening direction and the diagonal intersecting side is 30 degrees or more.

[0009] The adhesive strength between the adhesive sheet and the packaging box body is preferably within the range of 5 to 20 N / 15 mm.

[0010] Furthermore, a gripping piece to be gripped when pulling the adhesive sheet to open it can be provided on the outside of the opening start edge. This gripping piece can be provided on the adhesive sheet and can be an area where no adhesive is applied, or a break line (break line for gripping piece) can be provided on the packaging box body at a position outside the opening start edge, and the area surrounded by this break line for gripping piece can be the gripping piece.

[0011] The opening area can be provided on the top plate of the packaging box body. In this case, the adhesive application area of ​​the adhesive sheet can be adhered to the top plate of the packaging box body.

[0012] On the other hand, the opening area can be provided across the top panel and the front panel of the packaging box body. In this case, the adhesive application area of ​​the adhesive sheet can be bonded across the top panel and the front panel of the packaging box body.

[0013] The folding line may be a full cutting line that passes through the packaging box body.

[0014] The folding lines may also be lines at least part of which does not penetrate the packaging box body, such as pressed creases or perforated lines. [Effects of the Invention]

[0015] According to the present invention, the angle between the diagonal extending line and the direction perpendicular to the opening direction of the packaging box body is 15 degrees or more, or the angle between the diagonal intersecting side and the direction perpendicular to the opening direction of the adhesive sheet is 30 degrees or more, so that the adhesive sheet can be easily pulled up with little force and the packaging box can be easily opened. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is an explanatory perspective view of a packaging box according to a first embodiment of the present invention. [Figure 2] 2A and 2B relate to a first embodiment of the present invention, and FIG. 2A is an explanatory perspective view of a packaging box body, and FIG. 2B is an enlarged explanatory view of the area indicated by X in FIG. 2A. [Figure 3] FIG. 3 is an explanatory development view of the adhesive sheet according to the first embodiment of the present invention. [Figure 4] FIG. 4 is an explanatory cross-sectional view showing an open state of a packaging box according to the first embodiment of the present invention. [Figure 5] FIG. 5 is an explanatory perspective view of a packaging box according to a second embodiment of the present invention. [Figure 6] 6A and 6B relate to a second embodiment of the present invention, and FIG. 6A is an explanatory perspective view of a packaging box body, and FIG. 6B is an enlarged explanatory view of the area indicated by X in FIG. 6A. [Figure 7] FIG. 7 is a development view for explaining an adhesive sheet according to a second embodiment of the present invention. [Figure 8] FIG. 8 is an explanatory cross-sectional view showing an open state of a packaging box according to a second embodiment of the present invention. [Figure 9]FIG. 9 is an explanatory perspective view of a packaging box according to a third embodiment of the present invention. [Figure 10] 10A and 10B relate to a third embodiment of the present invention, and FIG. 10A is an explanatory perspective view of a packaging box body, and FIG. 10B is an enlarged explanatory view of the area indicated by X in FIG. 10A. [Figure 11] FIG. 11 is a development view for explaining an adhesive sheet according to a third embodiment of the present invention. [Figure 12] FIG. 12 is an explanatory perspective view of a packaging box according to a fourth embodiment of the present invention. [Figure 13] 13A and 13B relate to a fourth embodiment of the present invention, and FIG. 13A is an explanatory perspective view of a packaging box body, and FIG. 13B is an enlarged explanatory view of the area indicated by X in FIG. 13A. [Figure 14] FIG. 14 is an explanatory development view of an adhesive sheet according to a fourth embodiment of the present invention. [Figure 15] FIG. 15 is an explanatory perspective view of the packaging box according to the first experimental group. [Figure 16] FIG. 16 is an explanatory perspective view of the packaging box body according to the first experimental group. [Figure 17] FIG. 17 is a development view for explaining the adhesive sheet according to the first experimental group. [Figure 18] FIG. 18 is an explanatory perspective view of the packaging box according to the second experimental group. [Figure 19] FIG. 19 is an explanatory perspective view of the packaging box body according to the second experimental group. [Figure 20] FIG. 20 is a development view for explaining the adhesive sheet according to the second experimental group. [Figure 21] FIG. 21 is an explanatory perspective view of the packaging box according to the third experimental group. [Figure 22] FIG. 22 is an explanatory perspective view of the packaging box body according to the third experimental group. [Figure 23] FIG. 23 is a development view for explaining the adhesive sheet according to the third experimental group. [Figure 24] FIG. 24 is an explanatory perspective view of the packaging box according to the fourth experimental group. [Figure 25]FIG. 25 is an explanatory perspective view of the packaging box body according to the fourth experimental group. [Figure 26] FIG. 26 is a development view for explaining the adhesive sheet according to the fourth experimental group. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described. Note that a characteristic configuration of the present invention is that the angle θ1 between the direction perpendicular to the opening direction of the packaging box body and the oblique extending line is 15 degrees or more, or the angle θ2 between the direction perpendicular to the opening direction of the adhesive sheet and the oblique intersecting side is 30 degrees or more. Therefore, in all of the four embodiments described below, the outer angle θ1 is 15 degrees or more, and the outer angle θ2 is 30 degrees or more.

[0018] (First embodiment) A first embodiment will be described below with reference to the accompanying drawings. A packaging box A according to this embodiment has an opening area A101 that straddles a top panel A11 and a front panel A12, and a gripping piece A202 that is gripped when pulling an adhesive sheet A20 to open the box, which is formed from an area of ​​the adhesive sheet A20 where no adhesive is applied. Fig. 1 is an explanatory perspective view of the packaging box according to the first embodiment of the present invention, Fig. 2 is an explanatory perspective view of the packaging box itself, and Fig. 3 is an explanatory development view of the adhesive sheet. Fig. 4 shows the packaging box in an open state.

[0019] As can be seen from FIG. 1, this packaging box A is composed of a packaging box main body A10 and an adhesive sheet A20, and the adhesive sheet A20 is adhered to the outer surface of the packaging box main body A10.

[0020] The packaging box main body A10 has a rectangular parallelepiped shape as shown in Figures 1 and 2. Reference symbol A11 denotes a top panel, reference symbol A12 denotes a front panel, and reference symbol A13 denotes a side panel of the packaging box main body A10.

[0021] The top panel A11 is provided with a planned fold line A10a that extends parallel to the boundary line A10c between the top panel A11 and the front panel. This planned fold line A10a is a line that serves as the rotation center of the opening region, which will be described later, when the packaging box A is opened. This planned fold line A10a can be formed as a line, at least a portion of which does not penetrate the packaging box body, such as a pressed crease or perforation line. When the packaging box body A10 is made of an easily foldable material, the planned fold line A10a may be a virtual line that is intended to be folded when opening, without providing a pressed crease or perforation line. Alternatively, this planned fold line A10a can be formed as a cut line that penetrates the packaging box body A10.

[0022] The packaging box body 10 is provided with a break line A10b that starts from one end or its vicinity of both ends of the folding line A10a and reaches the other end or its vicinity. The break line A10b is made up of five parts.

[0023] First, the first portion A10b1 starts from one end of the intended folding line A10a or its vicinity and extends within the top panel A11. 12 It is a portion that extends beyond the boundary line A10c and within the front plate A12 in a direction perpendicular to the boundary line A10c.

[0024] Next, the second portion A10b2 is a portion that is continuous with the first portion A10b1 and extends obliquely within the front plate A12.

[0025] The third portion A10b3 is a portion that continues from the second portion A10b2 and extends within the front plate A12, and this third portion A10b3 extends parallel to the boundary line A10c.

[0026] Next, the fourth portion A10b4 is a portion that continues from the third portion A10b3 and extends diagonally within the front panel A12. As can be seen from the drawing, the fourth portion A10b4 is configured to be symmetrical with the second portion A10b2 with respect to the perpendicular bisector of the third portion A10b3 as the axis of symmetry.

[0027] Next, the fifth portion A10b5 is continuous with the fourth portion A10b4 and extends within the front plate A12. 12 , extends in a direction perpendicular to the boundary line A10c within the top panel A11, and reaches the other end of the intended folding line A10a or its vicinity.

[0028] The planned breaking line A10b can be formed, for example, by a perforation line or a half-cut line.

[0029] As can be seen from the above explanation, the planned breaking line A10b consisting of the first portion A10b1 to the fifth portion A10b5 and the planned folding line A10a together form a closed curve. The portion enclosed by this closed curve forms an opening area, and when the packaging box main body A10 is broken along the planned breaking line A10b and pulled in a direction perpendicular to the boundary line A10c, the opening area rotates around the planned folding line A10a, allowing the opening to be opened. In Figure 1, arrow α indicates this opening direction.

[0030] Next, an adhesive sheet A20 is adhered to the outer surface of this packaging box main body A10. This adhesive sheet A20 has a base material (adhesive sheet base material) on one side of which an adhesive layer is provided. As will be described later, the adhesive sheet A20 according to this embodiment is provided with a gripping piece A202 to be gripped when opening, and this gripping piece A202 is composed of an adhesive-free area where no adhesive is applied.

[0031] The adhesive application area A201, which has been applied with an adhesive and has achieved adhesiveness, is shown hatched in Figures 1 and 3. As can be seen from Figure 3, this adhesive application area A201 has a hexagonal shape similar to the opening area A101 of the packaging box main body A10, and moreover, it surrounds this opening area A101 and is adhered to the packaging box main body A10.

[0032] The edges that define the contour of the adhesive-applied region A101 will be described in relation to the planned folding line A10a and planned tear line A10b that surround the opening region A101. First, the first contour edge is the fixed edge A20a when opening that corresponds to the planned folding line A10a. This fixed edge A20a when opening is a edge that is adhered and fixed to the packaging box main body A10 and will not peel off even when the packaging box is opened. As can be seen from FIG. 1, the fixed edge A20a when opening is located outside the opening region A101. In this embodiment, the fixed edge A20a when opening extends parallel to the planned folding line A10a and therefore parallel to the boundary line A10c between the top panel A11 and the front panel.

[0033] Next, the second outer edge A20b1 is an outer edge corresponding to the first portion A10b1 of the intended tear line A10b. Therefore, the second outer edge A20b1 is disposed parallel to the first portion A10b1 and outside the opening area. That is, the second outer edge A20b1 starts from one end of the opening-fixed edge A20a, extends within the top panel A11, crosses the boundary line A10c, and extends within the front panel A12 in a direction perpendicular to the boundary line A10c.

[0034] Next, the third outer edge A20b2 is an outer edge corresponding to the second portion A10b2 of the planned break line A10b. This third outer edge A20b2 is also located outside the opening area and, like the second portion A10b2, extends obliquely within the front panel A12, continuing from the second outer edge A20b1. However, as can be seen from FIGS. 1 and 2(a), the third outer edge A20b2 does not extend parallel to the second portion A10b2 of the planned break line A10b.

[0035] Next, the fourth outer edge A20b3 is an outer edge corresponding to the third portion A10b3 of the intended break line A10b. This fourth outer edge A20b3 is parallel to the third portion A10b3 and is located outside the opening area. That is, this fourth outer edge A20b3 is continuous with the third outer edge A20b2 and extends parallel to the boundary line A10c within the front panel A12. The tab A202, which is not coated with adhesive, is connected to the outer side of this fourth outer edge A20b3.

[0036] Next, the fifth outer edge A20b4 is an outer edge corresponding to the fourth portion A104 of the planned break line A10b, and extends diagonally within the front panel A12, continuing from the fourth outer edge A20b3. As can be seen from the drawing, this fifth outer edge A20b4 is configured to be symmetrical with the third outer edge A20b2, with the perpendicular bisector of the fourth outer edge A20b3 as the axis of symmetry. Of course, the direction in which the fifth outer edge A20b4 extends is not parallel to the fourth portion A104 of the planned break line A10b.

[0037] Finally, the sixth outer edge A20b5 is an outer edge corresponding to the fifth portion A105 of the intended breaking line A10b. The sixth outer edge A20b5 is continuous with the fifth outer edge A20b4, extends within the front plate A12, and is aligned with the boundary line A10b. 12 and the boundary line A10 within the top panel A11. 12 2 and reaches the other end of the fixing side A20a when opening.

[0038] By the way, in this packaging box A, by pinching the gripping piece A202 and pulling the adhesive sheet A20 in the opening direction α, the packaging box main body A10 is broken along the planned breaking line A10b, and the opening area A201 surrounded by this planned breaking line A10b is rotated along the planned folding line A10a. 4. At this time, the planned tear line A10b first starts to tear at the third portion A10b3 perpendicular to the opening direction α. ​​Next, the second portion A10b2 and the fourth portion A10b4 located on both sides of the third portion A10b3 tear. Focusing on the planned tear line A10b of the packaging box main body A10, the second portion A10b2 and the fourth portion A10b4 extending in a direction obliquely intersecting the opening direction α are called diagonally extending lines. When the angle θ1 between the third portion A10b3 perpendicular to the opening direction α and the diagonally extending lines A10b2 and A10b4, i.e., the exterior angle θ1 at the intersection of the third portion A10b3 and the diagonally extending lines A10b2 and A10b4, is 15 degrees or more, the adhesive sheet A20 can be easily pulled up with a small force and the packaging box can be easily opened. In FIG. 2(b), "A10b3'" indicates an extension line of the third portion A10b3 perpendicular to the unsealing direction α, that is, a direction perpendicular to the unsealing direction α.

[0039] Furthermore, when focusing on the adhesive sheet A20, when the packaging box A is opened, first, the tab A202 is connected, and the fourth outer edge A20b3 perpendicular to the opening direction α is peeled off from the packaging box main body A10. Next, the third outer edge A20b2 and the fifth outer edge A20b4 located on both sides of the fourth outer edge A20b3 are broken. Therefore, the third outer edge A20b2 and the fifth outer edge A20b4 extending in a direction diagonally intersecting the opening direction α are called diagonal intersecting edges. When the angle θ2 between the fourth outer edge A20b3 perpendicular to the opening direction α and the diagonal intersecting edges A20b2, A20b4, i.e., the outer angle θ2 at the intersection of the fourth outer edge A20b3 and the diagonal intersecting edges A20b2, A20b4, is 30 degrees or more, the adhesive sheet A20 can be easily pulled up with a small force and easily opened. In FIG. 3, "A20b3'" indicates an extension line of the fourth outer side A20b3 perpendicular to the opening direction α, that is, a direction perpendicular to the opening direction α.

[0040] In addition, focusing on the adhesive strength between the adhesive application area A201 of the adhesive sheet A20 and the packaging box main body A10, when the adhesive strength is within the range of 5 to 20 N / 15 mm, the adhesive sheet A20 can be easily pulled up and opened with a small force.

[0041] Incidentally, the packaging box body A10 can preferably be made of a material containing paper in its layer structure. When the packaging box body A10 has a layer structure in which a moisture-proof plastic film is arranged on the inner side of a paper substrate, it can contain contents that require airtightness. For example, confectionery. Furthermore, when a water vapor barrier film is arranged on the inner side of the paper substrate, it is also possible to store wet tissues in addition to confectionery. Examples of water vapor barrier films include vapor-deposited films having a metal vapor deposition film or a vapor-deposited film of an inorganic oxide such as aluminum oxide. Also, polyvinylidene chloride films and films coated with this polyvinylidene chloride may be used. Furthermore, it is also possible to use a film having a metal foil such as aluminum foil in its layer structure.

[0042] The adhesive sheet A20 can have a pressure-sensitive adhesive layer on one side of its base material (adhesive sheet base material). The adhesive sheet base material can be any sheet, but preferably contains a plastic sheet in its layer structure. The pressure-sensitive adhesive layer can be preferably an adhesive that can adhere to the outer surface of the packaging box main body A10 and can be re-adhered to the outer surface of the packaging box main body A10 even after the adhered adhesive sheet A20 is peeled off. By using an adhesive that can be peeled off and adhered repeatedly in this way, the packaging box A can be opened and sealed repeatedly.

[0043] As described above, this packaging box A can be opened as shown in Fig. 4. That is, when the tab A202 is pinched and pulled up, the adhesive sheet A20 peels off from the paper box body in the area outside the opening area A101 and is pulled up while still adhering to the opening area, opening by rotating around the planned folding line A10a.

[0044] To reseal the box, the adhesive sheet A20 is rotated to close the opening, and the adhesive sheet A20 is adhered to the outer surface of the packaging box body A10 around the opening area.

[0045] This opening and resealing process can be repeated many times.

[0046] (Second embodiment) A second embodiment will be described below with reference to the accompanying drawings. In the packaging box A according to the first embodiment, the tab A202, which is used to pull the adhesive sheet A20 when opening the box, is formed from a non-adhesive region of the adhesive sheet A20. However, in the packaging box B according to the second embodiment, the adhesive sheet B20 does not have a non-adhesive region. Instead, a break line (tab break line) B10d is provided in the packaging box main body B10. A through-hole B102 is provided in the area surrounded by the tab break line B10d, and its edge serves as the tab. Otherwise, the packaging box B according to the second embodiment is similar to the first embodiment. Note that Fig. 5 is an explanatory perspective view of the packaging box B according to the second embodiment, Fig. 6 is an explanatory perspective view of the packaging box main body B10, and Fig. 7 is an explanatory development view of the adhesive sheet B20. Fig. 8 shows the packaging box B in an open state.

[0047] Like the packaging box main body A10 according to the first embodiment, this packaging box main body B10 also has an opening region spanning the top panel B11 and the front panel B12, and this opening region is surrounded by a planned folding line B10a and a planned breaking line B10b. Like the planned breaking line A10b according to the first embodiment, the planned breaking line B10b is composed of five portions B10b1 to B10b5, with the third portion B10b3 being partially bent outward to form a tab breaking line B10d, which will be described later. The second portion B10b2 and the fourth portion B10b4 are obliquely extending lines that extend in a direction obliquely intersecting the opening direction α. Furthermore, when the angle θ1 between the third portion B10b3 perpendicular to the opening direction α and the diagonal extending lines B10b2, B10b4, i.e., the exterior angle θ1 at the intersection of the diagonal extending lines B10b2, B10b4 and the third portion B10b3, is 15 degrees or greater, the adhesive sheet B20 can be easily pulled up and opened with a small force. In Figure 6(b), "B10b3'" indicates the extension line of the third portion B10b3 perpendicular to the opening direction α, i.e., the direction perpendicular to the opening direction α.

[0048] An adhesive sheet B20 is adhered to the outer surface of the packaging box main body B10. This is also the same as in the first embodiment. The adhesive sheet B20 has a hexagonal adhesive-applied area. Of the six outer edges B20b1 to B20b6 of this hexagonal adhesive-applied area, the third outer edge B20b2 and the fifth outer edge B20b4 are diagonal cross edges extending in a direction diagonally intersecting the opening direction α. ​​When the angle θ2 between the fourth outer edge B20b3 perpendicular to the opening direction α and the diagonal cross edges B20b2 and B20b4, i.e., the outer angle θ2 at the intersection of the fourth outer edge B20b3 and the diagonal cross edges B20b2 and B20b4, is 30 degrees or more, the adhesive sheet B20 can be easily pulled up with a small force and the box can be easily opened.

[0049] Next, the differences between the packaging box B according to the second embodiment and the packaging box A according to the first embodiment will be explained. First, in this packaging box B, an adhesive is applied to the entire surface of the adhesive sheet B20. That is, the entire surface of this adhesive sheet B20 is an adhesive-applied area, and there are no areas not coated with adhesive, and of course, there are no tabs formed from these areas not coated with adhesive. The adhesive sheet B20 is adhered to the packaging box main body B10 over its entire surface.

[0050] On the other hand, in the packaging box main body B10, in a part of the third portion B10b3 of the planned breaking line B10b, the planned breaking line A10b is bent outward and is located at a portion located outside the adhesive sheet B20. A curved gripping piece breaking line B10d is provided. A through-hole B102 is provided in the area surrounded by this gripping piece breaking line B10d and the fourth outer edge B20b3 of the adhesive sheet B20, and the edge thereof serves as a gripping piece.

[0051] Therefore, when opening this packaging box B, first, the edge of the through hole B102 is used as a gripping piece to pull out the gripping piece, and then the pulled-out gripping piece is pinched and pulled up, causing the opening area B101 to rotate around the intended folding line B10a as the rotation center and open.

[0052] As mentioned above, this packaging box B can also be easily opened with a small force if the angle θ1 between the third portion B10b3 perpendicular to the opening direction α and the diagonal extending lines B10b2, B10b4 is 15 degrees or more, or if the angle θ2 between the fourth outline side B20b3 perpendicular to the opening direction α and the diagonal intersecting sides B20b2, B20b4 is 30 degrees or more. Also, it is desirable that the adhesive strength between the adhesive-coated region B201 of the adhesive sheet B20 and the packaging box main body B10 be in the range of 5 to 20 N / 15 mm.

[0053] (Third embodiment) A third embodiment will be described below with reference to the accompanying drawings. In the packaging box A according to the first embodiment, the opening region is provided across the top panel A11 and the front panel A12, but in the packaging box C according to the third embodiment, the opening region is provided in the top panel C11 and does not reach the front panel C12. In other respects, the packaging box C is similar to the first embodiment. Note that Fig. 9 is an explanatory perspective view of the packaging box C according to the third embodiment, Fig. 10 is an explanatory perspective view of the packaging box main body C10, and Fig. 11 is an explanatory development view of the adhesive sheet C20.

[0054] In this packaging box main body C10, an opening region C101 is provided in the top panel C11. Similar to the opening region A101 according to the first embodiment, this opening region C101 is surrounded by a planned folding line C10a and a planned breaking line C10b. Similar to the planned breaking line A10b according to the first embodiment, the planned breaking line C10b is composed of five portions C10b1 to C10b5. Of these, the second portion C10b2 and the fourth portion C10b4 are obliquely extending lines that extend in a direction that obliquely intersects the opening direction α. ​​When the angle θ1 between the third portion C10b3 perpendicular to the opening direction α and the obliquely extending lines C10b2 and C10b4, i.e., the exterior angle θ1 at the intersection of the obliquely extending lines C10b2 and C10b4 and the third portion C10b3, is 15 degrees or greater, the adhesive sheet C20 can be easily pulled up and opened with little force. 10(b), "C10b3'" indicates an extension line of the third portion C10b3 perpendicular to the opening direction α, i.e., a direction perpendicular to the opening direction α. ​​As can be seen by comparing Figures 1 and 9, the diagonal extending lines A10b2, A10b4 and the third portion A10b3 in the first embodiment are located inside the front panel 12, while the diagonal extending lines C10b2, C10b4 and the third portion C10b3 in the third embodiment are located inside the top panel 11. For this reason, even though the directions in which the adhesive sheet C20 is pulled are different, the package can be easily opened in either case when the external angle θ1 is 15 degrees or greater.

[0055] An adhesive sheet C20 is adhered to the outer surface of the packaging box main body C10. This is also the same as in the first embodiment. The adhesive sheet C20 is provided with a hexagonal adhesive-coated area. Of the six outer edges C20b1 to C20b6 of this hexagonal adhesive-coated area, the fourth outer edge C20b3 is an opening start edge, and a gripping piece C202 made of an adhesive-free area is connected to the outside of the fourth outer edge C20b3. The third outer edge C20b2 and the fifth outer edge C20b4 are diagonal intersecting edges that extend in a direction diagonally intersecting the opening direction α. Furthermore, when the angle θ2 between the diagonal intersection sides C20b2, C20b4 and the opening start side C20b3, i.e., the exterior angle θ2 at the intersection of the fourth contour side C20b3 and the diagonal intersection sides C20b2, C20b4, is 30 degrees or more, the adhesive sheet C20 can be easily pulled up and opened with a small force.

[0056] Therefore, similar to the packaging box A of the first embodiment, this packaging box C can be opened by pulling out the gripping piece C202, pinching and pulling up the pulled-out gripping piece C202, and thereby rotating the opening area.

[0057] As mentioned above, this packaging box C can also be easily opened with a small force if the angle θ1 between the third portion C10b3 perpendicular to the opening direction α and the diagonal extending lines C10b2, C10b4 is 15 degrees or more, or if the angle θ2 between the fourth outline side C20b3 perpendicular to the opening direction α and the diagonal intersecting sides C20b2, C20b4 is 30 degrees or more. Also, it is desirable that the adhesive strength between the adhesive-coated region C201 of the adhesive sheet C20 and the packaging box main body C10 be in the range of 5 to 20 N / 15 mm.

[0058] (Fourth embodiment) A fourth embodiment will be described below with reference to the accompanying drawings. In the packaging box A according to the first embodiment, the opening area A101 is provided across the top panel A11 and the front panel A12. However, in the packaging box D according to the fourth embodiment, the opening area D101 is provided in the top panel D11 and does not reach the front panel D12. Furthermore, in the packaging box A according to the first embodiment, the gripping piece A202 that is gripped when pulling the adhesive sheet A20 to open it is configured as a non-adhesive area of ​​the adhesive sheet A20. However, in the packaging box D according to the fourth embodiment, the adhesive sheet D20 does not have a non-adhesive area. Instead, a break line (grip-piece break line) D10d is provided in the packaging box main body D10, and a through-hole D102 is provided in the area surrounded by the grip-piece break line D10d, with its edge serving as the gripping piece. In other respects, the fourth embodiment is similar to the first embodiment.

[0059] Comparing the packaging box D according to the fourth embodiment with the packaging box B according to the second embodiment, the opening region B101 in the packaging box B according to the second embodiment is provided across the top panel A11 and the front panel A12, whereas the opening region D101 in the packaging box D according to the fourth embodiment is provided in the top panel D11 and does not reach the front panel D12. Furthermore, while the packaging box B according to the second embodiment has a third portion B10b3 of the intended fracture line bent outward to form a tab fracture line B10d, the packaging box D according to the fourth embodiment does not have the third portion B10b3, and instead has a tab fracture line D10d that connects the end point of the second portion B10b1 and the end point of the fourth portion B10b4. In other respects, the two are generally similar.

[0060] Furthermore, comparing the packaging box D according to the fourth embodiment with the packaging box C according to the third embodiment, in the packaging box C according to the third embodiment, the gripping piece C202 that is gripped when the adhesive sheet C20 is pulled to open it is configured from an area of ​​the adhesive sheet C20 where no adhesive is applied, but in the packaging box D according to the fourth embodiment, the adhesive sheet D20 does not have an area where no adhesive is applied, and instead a break line (breaking line for gripping piece) D10d is provided in the packaging box main body D10, and a through hole D102 is provided in the area surrounded by this break line for gripping piece D10d, and its edge serves as the gripping piece. In other respects, the two are similar.

[0061] FIG. 12 is an explanatory perspective view of a packaging box D according to the fourth embodiment, FIG. 13 is an explanatory perspective view of a packaging box main body D10 thereof, and FIG. 14 is an explanatory development view of an adhesive sheet D20 thereof.

[0062] In this packaging box main body D10, an opening area is provided on the top panel D11. This opening area is surrounded by a planned folding line D10a and a planned breaking line D10b, similar to the opening area according to the first embodiment. The planned breaking line D10b is made up of four parts D10b1, D10b2, D10b4, and D10b5, and the end points of this second part D10b1 and A gripping piece breaking line D10d is provided so as to connect the end point of the fourth portion B10b4.

[0063] Of these four portions D10b1, D10b2, D10b4, and D10b5, the second portion D10b1 and the fourth portion D10b4 are obliquely extending lines that extend in a direction that obliquely intersects the opening direction α. ​​Although there is no third portion that linearly connects the end point of the second portion D10b1 and the end point of the fourth portion D10b4, if we consider a virtual line D10b3 corresponding to this third portion D10b3, this virtual line D10b3 is perpendicular to the opening direction α. ​​Furthermore, if the angle θ1 between this virtual line D10b3 perpendicular to the opening direction α and the obliquely extending lines D10b2 and D10b4 is 15 degrees or more, the adhesive sheet D20 can be easily pulled up and opened with little force. In FIG. 13(b), "C10b3'" indicates the extension of the virtual line D10b3 perpendicular to the opening direction α, i.e., the direction perpendicular to the opening direction α.

[0064] An adhesive sheet D20 is adhered to the outer surface of the packaging box main body D10. This is also the same as in the first embodiment. The adhesive sheet D20 has a hexagonal adhesive-applied area. Of the six outer edges D20b1 to D20b6 of this hexagonal adhesive-applied area, the third outer edge D20b2 and the fifth outer edge D20b4 are diagonal cross edges that extend in a direction that diagonally intersects with the opening direction α. ​​When the angle θ2 between the fourth outer edge D20b3 that is perpendicular to the opening direction α and the diagonal cross edges D20b2 and D20b4, i.e., the outer angle θ2 at the intersection of the fourth outer edge D20b3 and the diagonal cross edges D20b2 and D20b4, is 30 degrees or more, the adhesive sheet D20 can be easily pulled up with a small force and the box can be easily opened.

[0065] In this packaging box D, an adhesive is applied to the entire surface of the adhesive sheet D20. That is, the entire surface of this adhesive sheet D20 is an adhesive-applied area, and there are no areas where the adhesive is not applied, and of course there are no tabs formed from these areas where the adhesive is not applied. The entire surface of this adhesive sheet D20 is adhered to the packaging box main body D10.

[0066] Meanwhile, the packaging box main body B10 has a curved gripping piece breaking line D10d that connects an end point of the second portion D10b1 of the planned breaking line A10b with an end point of the fourth portion D10b4, and that is located outside the adhesive sheet D20. A through hole D102 is provided in the area surrounded by this gripping piece breaking line D10d and the fourth outer edge D20b3 of the adhesive sheet D20, and its edge serves as a gripping piece.

[0067] When opening this packaging box D, first, the edge of the through hole D102 is used as a gripping piece to pull out the gripping piece, and then the pulled-out gripping piece is pinched and pulled up, whereby the opening area D101 rotates around the intended folding line D10a as the rotation center and opens.

[0068] As mentioned above, this packaging box D can also be easily opened with a small force if the angle θ1 between the direction perpendicular to the opening direction α and the oblique extending lines D10b2, D10b4 is 15 degrees or more, or if the angle θ2 between the fourth outline side D20b3 perpendicular to the opening direction α and the oblique intersecting sides D20b2, D20b4 is 30 degrees or more. Also, it is desirable that the adhesive strength between the adhesive application area D201 of the adhesive sheet D20 and the packaging box main body D10 is in the range of 5 to 20 N / 15 mm. [Example]

[0069] [First experimental group] The packaging box used in these examples is the packaging box A according to the first embodiment shown in Figures 1 to 4. The layer structure of the packaging box body A10 is, from the outer surface side, a 30 μm thick polyethylene resin layer, a vapor-deposited film using a 12 μm thick polyester film as a vapor-deposited base material, a 30 μm thick polyethylene resin layer, and a 310 g / m 2 It is made of waterproof paper and a 30 μm thick polyethylene resin layer.

[0070] The adhesive sheet A20 used in these examples had a layer structure consisting of, from the outer surface, a 20 μm thick polypropylene film coated with polyvinylidene chloride, an adhesive, a 50 μm thick stretched polypropylene film, and an acrylic pressure-sensitive adhesive layer.

[0071] The dimensions of each part of the packaging box main body A10, the dimensions of each part of the adhesive sheet A20 used in these examples, and the dimensions of each part of the packaging box A with the adhesive sheet A20 adhered to the packaging box main body A10 are shown in Figures 15 to 17, respectively.

[0072] (Experimental Example 1-1) In Experimental Example 1-1, the angle θ1 between the direction perpendicular to the opening direction α and the diagonal extending lines A10b2 and A10b4 of the packaging box main body A10 was changed from 0 degrees to 30 degrees to determine whether the packaging box was easy to open. The results are shown in Table 1.

[0073] [Table 1]

[0074] From this result, it was understood that in the packaging box A according to the first embodiment shown in FIGS. 1 to 4, when the angle θ1 is 15 degrees or more, the adhesive sheet A20 can be easily peeled off and the packaging box can be easily opened.

[0075] (Experimental Example 1-2) In Experimental Example 1-2, the angle θ2 between the direction perpendicular to the opening direction α and the diagonal intersecting sides A20b2, A20b4 of the adhesive sheet A20 was changed from 0 degrees to 45 degrees to determine whether the package was easy to open. The results are shown in Table 2.

[0076] [Table 2]

[0077] From this result, it was understood that in the packaging box A according to the first embodiment shown in FIGS. 1 to 4, when the angle θ2 is 30 degrees or more, the adhesive sheet A20 can be easily peeled off and the packaging box can be easily opened.

[0078] (Experimental Example 1-3) In Experimental Example 1-3, the adhesive strength between the adhesive application area of ​​the adhesive sheet A20 and the packaging box main body A10 was changed to determine whether it was easy to open. The adhesive strength was measured under the conditions of 180-degree peeling and a peeling speed of 300 mm / min. The results are shown in Table 3.

[0079] [Table 3]

[0080] From these results, it was understood that in the packaging box A of the first embodiment shown in Figures 1 to 4, when the adhesive strength between the adhesive application area of ​​the adhesive sheet A20 and the packaging box main body A10 is within the range of 5 to 20 N / 15 mm, the adhesive sheet A20 can be easily peeled off and opened.

[0081] [Second experimental group] The packaging box used in these examples is the packaging box B according to the second embodiment shown in Figures 5 to 8. The layer structure of the packaging box body B10 is, from the outer surface side, an outer surface printed layer, a vapor deposition film using a 12 μm thick polyester film as a vapor deposition base material, a 20 μm thick polyethylene resin layer, and a 310 g / m2 polyethylene resin layer. 2 It is made of waterproof paper and a 30 μm thick polyethylene resin layer.

[0082] In addition, the layer structure of adhesive sheet B20 used in these examples was the same as that of adhesive sheet A20 used in the first experimental group, and consisted, from the outer surface side, of a 20 μm thick polypropylene film coated with polyvinylidene chloride, an adhesive, a 50 μm thick stretched polypropylene film, and an acrylic adhesive layer.

[0083] The dimensions of each part of the packaging box main body B10, the dimensions of each part of the adhesive sheet B20 used in these examples, and the dimensions of each part of the packaging box A in the state where the adhesive sheet B20 is adhered to the packaging box main body B10 are shown in Figures 18 to 20, respectively.

[0084] (Experimental Example 2-1) In Experimental Example 2-1, similar to Experimental Example 1-1, the angle θ1 between the direction perpendicular to the opening direction α and the diagonal extending lines B10b2, B10b4 of the packaging box main body B10 was changed from 0 degrees to 30 degrees to determine whether the packaging box was easy to open. The results were similar to those of Experimental Example 1-1. Therefore, it was found that the packaging box B according to the second embodiment shown in Figures 5 to 8 was also easy to open by easily peeling off the adhesive sheet A20 when the angle θ1 was 15 degrees or more, similar to the packaging box A.

[0085] (Experimental Example 2-2) In Experimental Example 2-2, similar to Experimental Example 1-2, the angle θ2 between the direction perpendicular to the opening direction α and the diagonal intersecting sides B20b2, B20b4 of the adhesive sheet B20 was changed from 0 degrees to 45 degrees to determine whether the packaging box was easy to open. The results were similar to those of Experimental Example 1-1. Therefore, it was found that, similar to the packaging box A, the packaging box B according to the second embodiment shown in Figures 5 to 8 can be easily peeled off and opened when the angle θ2 is 30 degrees or more.

[0086] (Experimental Example 2-3) In Experimental Example 2-3, similar to Experimental Example 1-3, the adhesive strength between the adhesive application area of ​​the adhesive sheet B20 and the packaging box main body B10 was varied to determine whether the packaging box was easy to open. The adhesive strength was measured at a 180-degree peeling angle and a peeling speed of 300 mm / min. The results were similar to those of Experimental Example 1-3. Therefore, similar to the packaging box A, it was found that the packaging box B according to the second embodiment shown in FIGS. 5 to 8 can be easily peeled and opened when the adhesive strength between the adhesive application area of ​​the adhesive sheet B20 and the packaging box main body B10 is within the range of 5 to 20 N / 15 mm.

[0087] [Third experimental group] The packaging box used in these examples is the packaging box C according to the third embodiment shown in Figures 9 to 11. The layer structure of the packaging box body C10 is the same as that of the packaging box body B10 used in the second experimental group. That is, from the outer surface side, it is made up of an outer surface printed layer, a vapor deposition film with a 12 μm thick polyester film as a vapor deposition base material, a 20 μm thick polyethylene resin layer, and a basis weight of 310 g / m2. 2 It is made of waterproof paper and a 30 μm thick polyethylene resin layer.

[0088] In addition, the layer structure of adhesive sheet C20 used in these examples was the same as that of adhesive sheet A20 used in the first experimental group, and consisted, from the outer surface side, of a 20 μm thick polypropylene film coated with polyvinylidene chloride, an adhesive, a 50 μm thick stretched polypropylene film, and an acrylic adhesive layer.

[0089] The dimensions of each part of the packaging box main body C10, the dimensions of each part of the adhesive sheet C20 used in these examples, and the dimensions of each part of the packaging box C with the adhesive sheet C20 adhered to the packaging box main body C10 are shown in Figures 21 to 23, respectively.

[0090] (Experimental Example 3-1) In Experimental Example 3-1, similarly to Experimental Examples 1-1 and 2-1, the angle θ1 between the direction perpendicular to the opening direction α and the obliquely extending lines C10b2, C10b4 of the packaging box main body C10 was changed from 0 degrees to 30 degrees to determine whether the packaging box B according to the third embodiment shown in Figs. 9 to 11 was easy to open. As with the packaging box A, it was found that when the angle θ1 was 15 degrees or more, the adhesive sheet C20 could be easily peeled off and the packaging box C20 could be easily opened.

[0091] (Experimental Example 3-2) In Experimental Example 2-2, similar to Experimental Examples 1-2 and 2-2, the angle θ2 between the direction perpendicular to the opening direction α and the diagonal intersecting sides C20b2, C20b4 of the adhesive sheet C20 was changed from 0 degrees to 45 degrees to determine whether the box was easy to open. The results were similar to those of Experimental Example 1-1. Therefore, it was found that the packaging box C according to the third embodiment shown in Figures 9 to 11 was also easy to peel off and open when the angle θ2 was 30 degrees or more, similar to the packaging box A.

[0092] (Experimental Example 3-3) In Experimental Example 3-3, similar to Experimental Examples 1-3 and 2-3, the adhesive strength between the adhesive application area of ​​the adhesive sheet C20 and the packaging box main body C10 was varied to determine whether the packaging box was easy to open. The adhesive strength was measured at a 180-degree peel angle and a peel speed of 300 mm / min. The results were similar to those of Experimental Example 1-3. Therefore, similar to the packaging box A, it was found that the packaging box C according to the third embodiment shown in FIGS. 9 to 11 can be easily peeled and opened when the adhesive strength between the adhesive application area of ​​the adhesive sheet B20 and the packaging box main body C10 is within the range of 5 to 20 N / 15 mm.

[0093] [Fourth experimental group] The packaging box used in these examples is the packaging box C according to the fourth embodiment shown in Figures 12 to 14. The layer structure of the packaging box body D10 is the same as that of the packaging box bodies B10 and C10 used in the second and third experimental groups. That is, from the outer surface side, it is made up of an outer surface printed layer, a vapor deposition film with a 12 μm thick polyester film as a vapor deposition base material, a 20 μm thick polyethylene resin layer, and a basis weight of 310 g / m2. 2 It is made of waterproof paper and a 30 μm thick polyethylene resin layer.

[0094] In addition, the layer structure of adhesive sheet D20 used in these examples was the same as that of adhesive sheet A20 used in the first experimental group, and consisted, from the outer surface side, of a 20 μm thick polypropylene film coated with polyvinylidene chloride, an adhesive, a 50 μm thick stretched polypropylene film, and an acrylic adhesive layer.

[0095] The dimensions of each part of the packaging box main body D10, the dimensions of each part of the adhesive sheet D20 used in these examples, and the dimensions of each part of the packaging box D with the adhesive sheet D20 adhered to the packaging box main body D10 are shown in Figures 21 to 23, respectively.

[0096] (Experimental Example 4-1) In Experimental Example 4-1, similar to Experimental Examples 1-1 to 3-1, the angle θ1 between the direction perpendicular to the opening direction α and the diagonal extending lines D10b2, D10b4 of the packaging box main body D10 was changed from 0 degrees to 30 degrees, and the ease of opening was determined. The results were similar to those of Experimental Example 1-1. Therefore, it was found that, similar to the packaging box A, the packaging box D according to the fourth embodiment shown in Figures 12 to 14 can be easily opened by peeling off the adhesive sheet D20 when the angle θ1 is 15 degrees or more.

[0097] (Experimental Example 4-2) In Experimental Example 4-2, similarly to Experimental Examples 1-2 to 3-2, the angle θ2 between the direction perpendicular to the opening direction α and the diagonal intersecting sides D20b2, D20b4 of the adhesive sheet D20 was changed from 0 degrees to 45 degrees to determine whether the packaging box C according to the fourth embodiment shown in Figs. 12 to 14 was easy to open. The results were similar to those of Experimental Example 1-1. As with the packaging box A, it was found that when the angle θ2 was 30 degrees or more, the adhesive sheet B20 could be easily peeled off and the packaging box could be easily opened.

[0098] (Experimental Example 4-3) In Experimental Example 4-3, similar to Experimental Examples 1-3 to 3-3, the adhesive strength between the adhesive application area of ​​adhesive sheet D20 and packaging box main body D10 was varied to determine whether the packaging box was easy to open. The adhesive strength was measured under conditions of 180-degree peeling and a peeling speed of 300 mm / min. The results were similar to those of Experimental Example 1-3. Therefore, similar to the packaging box A, it was found that the packaging box C according to the fourth embodiment shown in FIGS. 12 to 14 can be easily peeled and opened when the adhesive strength between the adhesive application area of ​​adhesive sheet D20 and packaging box main body D10 is within the range of 5 to 20 N / 15 mm. [Explanation of symbols]

[0099] A: Packaging box A10: Packaging box body A101: Opening area A10a: Planned bending line A10b: Planned break line A10b1: First part A10b2: Second part (diagonally extending line) A10b3: Third part A10b3': Extension line of the third part A10b4: Fourth part (diagonally extending line) A10b5: Fifth part A10c: Boundary line between top panel and front panel A11: Top plate A12: Front plate A13: Side plate A20: Adhesive sheet A201: Adhesive application area A202: Grip piece A20a: Fixed side when opened A20b: Outer side A20b1: Second outer side A20b2: Third outer side (diagonal crossing side) A20b3: Fourth outer side A20b3': Extension line of the fourth outer side A20b4: Fifth outer side (diagonal crossing side) A20b5: Sixth outer side B: Packaging box B10: Packaging box body B101: Opening area B102: Through hole B10a: Planned bending line B10b: Planned break line B10b1: First part B10b2: Second part (diagonally extending line) B10b3: Third part B10b3': Extension line of the third part B10b4: Fourth part (diagonally extending line) B10b5: Fifth part B10d: Breaking line for gripping piece B11: Top plate B12: Front plate B13: Side plate B20: Adhesive sheet B201: Adhesive application area B20a: Fixed side when opened B20b: Outer edge B20b1: Second outer edge B20b2: Third outer edge (diagonal crossing edge) B20b3: Fourth outer edge B20b3': Extension line of the fourth outer edge B20b4: Fifth outer edge (diagonal crossing edge) B20b5: Sixth outer edge C: Packaging box C10: Packaging box body C101: Opening area C10a: Planned bending line C10b: planned break line C10b1: first portion C10b2: second portion (diagonally extending line) C10b3: third portion C10b3': extension line of the third portion C10b4: fourth portion (diagonally extending line) C10b5: fifth portion C11: Top plate C12: Front plate C13: Side plate C20: Adhesive sheet C201: Adhesive application area C202: Grip piece C20a: Fixed side when opened C20b: Outer edge C20b1: Second outer edge C20b2: Third outer edge (diagonal crossing edge) C20b3: Fourth outer edge C20b3': Extension line of the fourth outer edge C20b4: 5th outer edge (diagonal crossing edge) C20b5: 6th outer edge D: Packaging box D10: Packaging box body D101: Opening area D102: Through hole D10a: Planned bending line D10b: Planned break line D10b1: First part D10b2: Second part BD10b3: Virtual line D10b3': Extension of virtual line D10b4: Fourth part D10b5: Fifth part D10d: Breaking line for gripping piece D11: Top plate D12: Front plate D13: Side plate D20: Adhesive sheet D201: Adhesive application area D20a: Fixed side when opened D20b: Outer edge D20b1: Second outer edge D20b2: Third outer edge (diagonal crossing edge) D20b3: Fourth outer edge D20b3': Extension line of the fourth outer edge D20b4: Fifth outer edge (diagonal crossing edge) D20b5: Sixth outer edge

Claims

1. A packaging box comprising a packaging box body and an adhesive sheet adhered to the packaging box body, The packaging box body has a top panel and a front panel adjacent thereto, and an opening area that opens on the top panel or an opening area that opens across the top panel and the front panel is provided, The opening area is surrounded by the planned breaking line and the planned folding line, On the other hand, the adhesive sheet has an adhesive applied to a part or the entire surface thereof to form an adhesive application area, and this adhesive application area is adhered to the outer surface of the packaging box body, surrounding the opening area, This adhesive sheet has one end serving as an opening start end and the planned folding line of the packaging box main body serving as an opening end, and is configured so that by pulling the adhesive sheet in the opening direction, which is the direction from the opening start end toward the opening end, it breaks along the planned breaking line and the opening region of the packaging box main body can be opened, the predetermined tear line has an obliquely extending line extending in a direction obliquely intersecting the opening direction at the opening start end, The angle θ 1 between the direction perpendicular to the opening direction and the oblique extending line is 15 degrees or more, the adhesive application area has an oblique crossing side extending in a direction obliquely intersecting the opening direction at the opening start end, The packaging box is characterized in that an angle θ 2 between the direction perpendicular to the opening direction and the diagonal intersecting side is 30 degrees or more and is larger than angle θ 1 .

2. 2. The packaging box according to claim 1, wherein the adhesive strength between the adhesive sheet and the packaging box body is within a range of 5 to 20 N / 15 mm.

3. 3. The packaging box according to claim 1, wherein a gripping piece for gripping when pulling the adhesive sheet to open the box is provided on the outside of the opening start end.

4. 4. The packaging box according to claim 3, wherein the gripping piece is provided on the adhesive sheet and comprises a non-adhesive-coated area where no adhesive is coated.

5. 4. The packaging box according to claim 3, wherein a break line (break line for a gripping piece) is provided on the packaging box body at a position outside the opening start end, and the area surrounded by this break line for the gripping piece is used as the gripping piece.

6. 6. The packaging box according to claim 1, wherein the opening area is provided on a top panel of the packaging box body.

7. 7. The packaging box according to claim 6, wherein the adhesive application area of ​​the adhesive sheet is adhered to the top panel of the packaging box body.

8. 6. The packaging box according to claim 1, wherein the opening area is provided across the top panel and the front panel of the packaging box body.

9. 9. The packaging box according to claim 8, wherein the adhesive application area of ​​the adhesive sheet is adhered across the top panel and the front panel of the packaging box body.

10. 10. The packaging box according to claim 1, wherein the predetermined folding line is a full cutting line that passes through the packaging box body.

11. 10. The packaging box according to claim 1, wherein the folding line is a line at least a part of which does not penetrate the packaging box body.

12. The packaging box according to claim 11, wherein the intended folding lines are press lines.

13. 12. The packaging box according to claim 11, wherein the folding lines are perforation lines.

Images