Packaging box paperboard

Abstract

To provide a paperboard for a packing box capable of making a window portion and forming a packing box that does not easily buckle.SOLUTION: A paperboard for a packing box 10 comprises a right side wall 5, a front wall 6, a left side wall 7, and a rear wall 8. In the present embodiment, the front wall 6 includes a window planned portion 21 which is an unprocessed region where a window portion 20 is planed to be formed by cutting off a part of the front wall 6 by a cutter 30. The window planned portion 21 is a quadrangle-shaped, and insertion ports 22 where a cutting blade 32 of the cutter 30 are inserted from a front surface side to a rear surface side of the front wall 6 along with a protection member 34 are formed at positions corresponding to four vertices of the quadrangle. The front wall 6 is provided with a cross insertion port 23 formed by overlapping a plurality of insertion ports 22.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a paperboard for packaging boxes, and more particularly to a paperboard for packaging boxes in which a window portion is formed in a plate-like member using a cutter. [Background technology]

[0002] As a packaging box for storing products, a packaging box (display box) has been proposed in which a part of the side is cut out and perforated to form a window for display (see, for example, Patent Document 1).

[0003] The packaging box described in Patent Document 1 has multiple types of perforations with different opening rates formed on the side, and a window for display is formed by tearing the perforations on the side starting from the part with the larger opening rate, inserting fingers into the torn part, and removing the part surrounded by other perforations. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 7-28821 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the packaging box described in Patent Document 1, perforations for forming the window portion are formed over a wide area on the side, so when the packaging boxes are stacked, there is a risk of them buckling at the perforations extending horizontally.

[0006] In view of the above, an object of the present invention is to provide a paperboard for packaging boxes that can be formed with a window and that can form a packaging box that is less likely to buckle. [Means for solving the problem]

[0007] The paperboard for packaging boxes of the present invention comprises three or more plate-like members connected sequentially to the right side via vertical fold lines to the right edge of a connecting piece, and flaps connected to the upper and lower edges of the plate-like members via horizontal fold lines and capable of sealing the open end of a tubular body formed when the connecting piece is adhered to the right end of the right-most plate-like member by folding at each vertical fold line, and the paperboard for packaging boxes has a window-provision portion which is an unprocessed area where a window portion is to be formed by cutting out part of the plate-like members using a cutter comprising a cutter body having a gripping portion, a cutting blade supported by the cutter body, and a protective member fixed to the cutting edge of the cutting blade and covering the cutting edge, and the window-provision portion is polygonal, and insertion openings are formed at positions corresponding to each vertex of the polygonal shape to allow the protective member to be inserted from the front side to the back side of the plate-like members.

[0008] In the present invention, three or more plate-like members are connected to the right side of the right edge of a connecting piece via vertical fold lines, and when the connecting piece is folded along each vertical fold line and the right end of the rightmost plate-like member is adhered to the right end, a cylindrical body is formed.The open end of this cylindrical body is sealed with flaps connected to the upper and lower edges of the plate-like members via horizontal fold lines, and a polygonal packaging box is formed.

[0009] In addition, in the present invention, the window portion, which is an unprocessed area where a window portion is intended to be formed by cutting out a part of the plate-shaped member with a cutter, is polygonal in shape, and at positions corresponding to each vertex of the polygonal shape, an insertion opening is formed that allows the cutting blade of the cutter, together with the protective member, to be inserted from the front side to the back side of the plate-shaped member.

[0010] With this configuration, after inserting the protective member for the cutter through the first insertion opening, the cutter is moved to the second insertion opening, whereby the cutting blade of the cutter can cut the plate-shaped member along the sides of the polygonal shape from the first insertion opening to the second insertion opening. By repeating this cutting process so as to connect three or more insertion openings, the window portions can be cut out of the plate-shaped member and the windows can be formed.

[0011] According to the present invention, a window section can be formed simply by forming insertion openings at positions corresponding to each vertex of the polygonal window section, and since no openings or perforations are formed between each insertion opening, buckling, which is likely to occur when openings or perforations are formed between each insertion opening, is less likely to occur.

[0012] It is also preferable that intersecting insertion openings formed by overlapping a plurality of the insertion openings are provided at positions corresponding to vertices of the polygonal shape.

[0013] According to this configuration, by providing an intersecting insertion port at each vertex of the polygon, where multiple insertion ports extending in different directions overlap, for example, for two adjacent intersecting insertion ports, it is possible to insert a cutter into a first intersecting insertion port and then move it to a second intersecting insertion port, or to insert the cutter into the second intersecting insertion port and then move it to the first intersecting insertion port, which allows the cutter to be easily moved regardless of the worker's dominant hand.

[0014] Furthermore, it is preferable that the intersecting insertion port is composed of a bent cut that extends along two sides that constitute the vertices of the polygonal shape and is bent by connecting a pair of unit cuts, each having a length greater than the length in the direction along the cutting edge of the protective member, at the vertex, and an auxiliary cut that extends and intersects each end of the pair of unit cuts and has a length greater than the width in the direction intersecting the cutting edge of the protective member.

[0015] According to this configuration, the unit cut has a length equal to or greater than the length of the protective member in the direction along the cutting edge, so that the protective member can be inserted into the unit cut.

[0016] Furthermore, the auxiliary cuts extending across each end of the unit cut have a length equal to or greater than the width of the protective member in the direction intersecting the cutting edge, so that when the protective member is inserted into the unit cut, the portions on both sides of the unit cut in the direction intersecting the cutting edge, up to both ends of the auxiliary cut, can be deformed in the insertion direction, thereby allowing the protective member to be securely inserted into the packaging box.

[0017] Furthermore, it is preferable that the auxiliary cut extended from the end of one of the unit cuts constituting the bent cut that is connected to the other unit cut has at least a portion thereof overlapping with the other unit cut.

[0018] With this configuration, the auxiliary cuts extending from one unit cut to the end connected to the other unit cut can reduce the amount of cuts compared to when the auxiliary cuts do not overlap with the other unit cut, thereby further suppressing buckling.

[0019] Furthermore, it is preferable that cutting assistance lines for guiding the cutting direction along the sides of the polygonal shape are printed on the surface of the plate-like member.

[0020] With this configuration, the cutting direction can be guided by the cutting assist lines, making it easy to cut the plate-shaped member to form the window portion. Furthermore, even when forming a triangular or polygonal window portion with five or more sides, which are more difficult to form than a rectangular one, the window portion can be easily formed by simply cutting along the cutting assist lines. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view showing a packaging box according to an embodiment. [Figure 2] FIG. 2 is a plan view of the paperboard for the packaging box, showing the packaging box unfolded. [Figure 3] FIG. [Figure 4] FIG. 10 is a cross-sectional view showing a state in which the cutter protection member is inserted into the insertion opening. [Figure 5] FIG. 10 is a cross-sectional view showing a state in which the cutter protection member is inserted into the insertion opening. [Figure 6] FIG. 10 is a perspective view showing a state in which a window portion is formed in the front wall of the packaging box. [Figure 7] FIG. 10 is an explanatory diagram showing a modified example of the insertion slot. DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the present invention will be described with reference to the drawings.

[0023] As shown in Fig. 1, the packaging box 1 is formed in a rectangular box shape and includes a rectangular cylindrical body 2 and opposing top and bottom flaps 3 and 4. The packaging box 1 is intended to store, for example, a plurality of products S (see Fig. 6).

[0024] The cylindrical body 2 has a right side wall 5 (plate-shaped member), a front wall 6 (plate-shaped member), a left side wall 7 (plate-shaped member) and a rear wall 8 (plate-shaped member), and the right side wall 5 and the left side wall 7 face each other, and the front wall 6 and the rear wall 8 face each other, forming a rectangular cylindrical shape.

[0025] As shown in FIG. 2, the packaging box 1 is assembled from a packaging box paperboard 10 that has been punched into a roughly rectangular shape.

[0026] 2, the packaging box paperboard 10 has a rectangular right wall 5 extending in the left-right and front-rear directions connected to the right edge of the connecting piece 11 via a vertical fold line L2, and a front wall 6 connected to the right edge of the right wall 5 via a vertical fold line L1. The connecting piece 11 is adhered to the rear wall 8.

[0027] A rectangular left wall 7 is connected to the right edge of the front wall 6 via a vertical fold line L3, and a rectangular rear wall 8 is connected to the right edge of the left wall 7 via a vertical fold line L4. In this embodiment, the walls 5 to 8 (three or more plate-like members) are connected to the right edge of the connecting piece 11 in sequence via vertical fold lines L1 to L4.

[0028] The top flap 3 is composed of top flap portions 3a to 3d, and seals the top opening of the cylindrical body 2. The top flap portion 3a and the top flap portion 3c face each other, and the top flap portion 3b and the top flap portion 3d face each other.

[0029] The upper flap portion 3a is connected to the upper edge of the right wall 5 via a horizontal fold line L5, and the upper flap portion 3b is connected to the upper edge of the front wall 6 via a horizontal fold line L6.

[0030] The upper flap portion 3c is connected to the upper edge of the left side wall 7 via a horizontal fold line L7, and the upper flap portion 3d is connected to the upper edge of the rear wall 8 via a horizontal fold line L8.

[0031] The top surface flap portions 3a to 3d are folded along horizontal fold lines L5 to L8 toward the inside of the tubular body 2. The top surface flap portions 3b and 3d are folded outside the top surface flap portions 3a and 3c and are adhered to the top surface flap portions 3a and 3c with, for example, an adhesive.

[0032] The bottom flap 4 is composed of bottom flap portions 4a to 4d and seals the bottom opening of the cylindrical body 2. The bottom flap portion 4a and the bottom flap portion 4c face each other, and the bottom flap portion 4b and the bottom flap portion 4d face each other.

[0033] The bottom flap portion 4a is connected to the lower edge of the right wall 5 via a horizontal fold line L9, and the bottom flap portion 4b is connected to the lower edge of the front wall 6 via a horizontal fold line L10.

[0034] The bottom flap portion 4c is connected to the lower edge of the left wall 7 via a horizontal fold line L11, and the bottom flap portion 4d is connected to the lower edge of the rear wall 8 via a horizontal fold line L12.

[0035] The bottom flap portions 4a to 4d are folded along horizontal fold lines L9 to L12 toward the inside of the tubular body 2. The bottom flap portions 4b and 4d are folded outside the bottom flap portions 4a and 4c and are adhered to the bottom flap portions 4a and 4c with, for example, an adhesive.

[0036] As will be described in detail later, a window portion 20 (see FIG. 6) is formed in the front wall 6 of the packaging box 1 of this embodiment by using a cutter 30 shown in FIG. 3. Here, the configuration of the cutter 30 used in this embodiment will be described.

[0037] The cutter 30 comprises a cutter body 32 having a grip portion 31 which is an oval hole through which a finger is passed, a disk-shaped cutting blade 33 supported by the cutter body 32, and a protective member 34 fixed to the cutting edge of the cutting blade 33 and covering the cutting edge. A plurality of protective members 34 (for example, four) are provided at predetermined intervals (for example, 90°).

[0038] A part of the cutting blade 33 is exposed from the cutter body 32. The exposed cutting edge of the cutting blade 33 is covered by a protective member 34. The part of the cutting blade 33 located between the protective member 34 and the cutter body 32 is used to cut away a part of the front wall 6.

[0039] After inserting the protective member 34 into the front wall 6 of the packaging box 1, the cutter 30 can cut away a portion of the front wall 6 by pulling the cutter body 32 in the direction in which the cutting blade 33 is facing. At this time, the cutting blade 33 moves up and down or left and right on the front wall 6 as the cutting progresses, but the protective member 34 moves inside the front wall 6 (inside the cylindrical body 2), so damage to the product S by the cutting blade 33 is prevented.

[0040] Since the cutting blade 33 is disk-shaped, when the sharpness of the cutting blade 33 becomes dull, the cutting blade 33 can be rotated to use the sharper part.

[0041] As shown in Figures 1 and 2, the front wall 6 has a window portion 21, which is an unprocessed area where a window portion 20 (see Figure 6) is to be formed by cutting out a part of the front wall 6 with a cutter 30.

[0042] The intended window portion 21 has a polygonal shape (for example, a quadrilateral shape), and at positions corresponding to each of the four vertices of the quadrilateral shape, an insertion opening 22 is formed for inserting the cutting blade 33 of the cutter 30 together with the protective member 34 from the front surface side to the back surface side (inside the cylindrical body 2) of the front wall 6. The front wall 6 is provided with an intersecting insertion opening 23 formed by multiple insertion openings 22 overlapping each other.

[0043] The intersecting insertion opening 23 extends along two sides constituting the vertices of a quadrangle, and is formed by a pair of unit incisions 23a, each having a length equal to or greater than length W1 (see FIG. 3) in the direction along the cutting edge 33 of the protective member 34 of the cutter 30, being connected at the vertices to form a bent incision 23b, and auxiliary incisions 23c, each extending to intersect with each end of the pair of unit incisions 23a and having a length equal to or greater than width W2 (see FIG. 4) in the direction intersecting with the cutting edge 33 of the protective member 34. In this embodiment, the unit incision 23a and the two auxiliary incisions 23c, each extending to each end of the unit incision 23a, form a substantially I-shape.

[0044] In this embodiment, the auxiliary cut 23c, which is extended from the end of one of the unit cuts 23a that make up the bent cut 23b and is connected to the other unit cut 23a, is formed so that a portion of it overlaps with the other unit cut 23a.

[0045] The four insertion openings 22 formed at the vertices of the rectangular pre-window portion 21 have the unit cuts 23a and auxiliary cuts 23c oriented in different directions, but are all configured in the same shape.

[0046] [Window formation] The process of cutting out the window portion 21 in the front wall 6 using the cutter 30 to form the window portion 20 will be described.

[0047] First, as shown in Fig. 4, the protective member 34 of the cutter 30 is pressed against the unit cut 23a of the insertion opening 22 formed in the front wall 6. In this embodiment, the unit cut 23a has a length equal to or greater than the length W1 of the protective member 34 of the cutter 30, so that the protective member 34 of the cutter 30 can be smoothly inserted into the interior of the cylindrical body 2, which is the back side of the front wall 6 (the lower surface side in Fig. 4).

[0048] Furthermore, auxiliary cuts 23c having a length equal to or greater than the width W2 of the protective member 34 are formed at each end of the unit cut 23a, so that when the protective member 34 of the cutter 30 is pressed against the unit cut 23a, the expansion portions 6a on both sides of the unit cut 23a are expanded. This allows the protective member 34 to be securely inserted into the cylindrical body 2.

[0049] Furthermore, the cutting edge 33 of the cutter 30 fits into the unit cut 23a, so that the cutting edge 33 is reliably oriented in the direction of travel.

[0050] 5, with the protective member 34 of the cutter 30 inserted into the unit cut 23a of the insertion opening 22 formed in the front wall 6, the cutter body 32 is pulled along the outer surface of the front wall 6 and moved in the direction of extension of the unit cut 23a. At this time, the cutting blade 33 of the cutter 30 is guided in the moving direction by the unit cut 23a, allowing the part of the front wall 6 to be cut stably and smoothly.

[0051] This process is carried out, for example, from the upper left vertex to the upper right vertex of the rectangular pre-window portion 21. Similarly, the process is carried out from the upper right vertex to the lower right vertex of the pre-window portion 21, from the lower right vertex to the lower left vertex of the pre-window portion 21, and from the lower left vertex to the upper left vertex of the pre-window portion 21.

[0052] Through the above steps, the window portion 21 of the front wall 6 is cut out to form a rectangular window portion 20, as shown in Fig. 6. This makes it possible to view the product S contained inside the packaging box 1 through the window portion 20. Note that the expansion portion 6a is not shown in Figs. 5 and 6.

[0053] In this way, in this embodiment, the window portion 20 can be formed using the cutter 30 simply by forming the insertion openings 22 at positions corresponding to each vertex of the rectangular window portion 21, and since no openings or perforations are formed between each insertion opening 22, buckling, which is likely to occur when openings or perforations are formed between each insertion opening 22, can be made less likely to occur.

[0054] In the above embodiment, the to-be-window portion 21 is rectangular, but the to-be-window portion may be any polygonal shape, such as a triangular shape or a polygonal shape with five or more sides.

[0055] Furthermore, it is sufficient that the insertion openings are formed at positions corresponding to the vertices of the polygonal shape of the prospective window portion, and the shapes of the insertion openings (the shapes of the unit cuts, bend cuts, and auxiliary cuts of the intersecting insertion openings) can be changed as appropriate.

[0056] For example, insertion sections 101 to 105 as shown in FIGS. 7A to 7E may be formed on the front wall 6.

[0057] 7A, the insertion section 101 has two intersecting insertion openings 101a and two insertion openings 101b. Each of the two intersecting insertion openings 101a is formed in the same manner as the intersecting insertion opening 23 of the above embodiment. Each of the two insertion openings 101b is formed by a substantially I-shaped insertion cutout made up of a unit cutout and two auxiliary cutouts, similar to the above embodiment.

[0058] Additionally, cutting assistance lines 101c are formed along the sides of the quadrangle to guide the cutting direction. These cutting assistance lines 101c extend to connect the intersecting insertion openings 101a to each other, to connect the insertion openings 101b to each other, and to connect the intersecting insertion openings 101a and the insertion openings 101b.

[0059] 7B, the insertion section 102 has four insertion openings 102a. Each of the four insertion openings 102a has two generally I-shaped insertion cuts 102b, each consisting of a unit cut and two auxiliary cuts, similar to the embodiment described above. The two insertion cuts 102b are formed to extend in the left-right and up-down directions with a gap between them, and each of the gaps in the front wall 6 has an arc-shaped cut 102c formed to connect adjacent insertion cuts 102b.

[0060] Additionally, cutting assistance lines 102d are formed along the sides of the quadrangle to guide the cutting direction. These cutting assistance lines 102d extend so as to connect the insertion openings 102a to each other.

[0061] As shown in FIG. 7C, the insertion section 103 has a plurality of (e.g., eight) intersecting insertion openings 103a. Each of the eight intersecting insertion openings 103a is formed by two overlapping insertion openings 103b, each of which is substantially I-shaped and includes a unit opening and two auxiliary openings, similar to the above embodiment. The orientations of the insertion openings 103b of the eight intersecting insertion openings 103a are different. As a result, by appropriately selecting the insertion openings 103b into which the cutting blade 33 (protective member 34) of the cutter 30 is inserted, it is possible to form window sections of various shapes, such as triangular and rectangular, and even multiple window sections.

[0062] Further, cutting assistance lines 103c for guiding the cutting direction are formed along the sides of the polygonal shape (triangle or square shape). These cutting assistance lines 103c extend so as to connect the insertion cuts 103b to each other.

[0063] As shown in Fig. 7D, the insertion portion 104 has a plurality of (e.g., eight) intersecting insertion openings 104a. The intersecting insertion openings 104a have eight generally I-shaped insertion incisions, each consisting of a unit incision and two auxiliary incisions, similar to those in the above embodiment. The eight insertion incisions are aligned at 45° intervals in the circumferential direction, with the centers of the eight insertion incisions being in the same position. This allows for the formation of window sections of various shapes, such as triangular, rectangular, pentagonal, and hexagonal, by appropriately selecting the insertion incisions into which the cutting blade 33 (protective member 34) of the cutter 30 is inserted. Furthermore, it is possible to form multiple window sections.

[0064] Further, cutting assistance lines 104b for guiding the cutting direction are formed along the sides of the polygonal shape (triangle or square shape). These cutting assistance lines 104b extend so as to connect the intersecting insertion openings 104a.

[0065] 7E, the insertion section 105 has four intersecting insertion openings 105a. Each of the four intersecting insertion openings 105a is formed by two overlapping, generally U-shaped insertion slits 105b, each of which is made up of a unit slit and two auxiliary slits, similar to the embodiment described above.

[0066] Additionally, cutting assistance lines 105c are formed along the sides of the quadrangle to guide the cutting direction. These cutting assistance lines 105c extend so as to connect the insertion cuts 105b to each other.

[0067] In the embodiment shown in Figures 7A to 7E, the cutting direction of the cutter 30 can be guided by the cutting assistance lines 101c, 102d, 103c, 104b, and 105c, so that the front wall 6 can be easily cut to form a window portion.

[0068] In the embodiment shown in FIGS. 7A to 7E, the type of the cutting assist line can be changed as appropriate, and may be a solid line, a two-dot chain line, an arrow line, or even a mark.

[0069] In the embodiment shown in FIGS. 7A to 7E, the cutting assistance lines may not be formed.

[0070] Furthermore, the cutting assistance lines in the embodiment shown in FIGS. 7A to 7E may also be formed in the embodiment shown in FIGS.

[0071] Furthermore, in the above embodiment, the packaging box 1 is made of packaging box paperboard 10, but it may also be made of corrugated paperboard, resin, metal, or the like.

[0072] Furthermore, in the above embodiment, the present invention is applied to packaging box paperboard 10 that constitutes a packaging box 1 of the so-called mandarin orange box type, but the present invention can be applied to packaging box paperboard that constitutes various types of packaging boxes, such as wrap-around type.

[0073] In the above embodiment, the planned window portion 21 is formed in the front wall 6, but the planned window portion may also be formed in the right wall 5, the left wall 7, or the rear wall 8, or may be formed so as to straddle two or more walls. Also, the planned window portion may be formed in each of two or more walls.

[0074] Furthermore, in the above embodiment, when the protective member 34 of the cutter 30 is inserted into the cylindrical body 2, it stops at the expanded position of the expanded portion 6a (see FIG. 4), but it may stop at a position where it passes through the expanded portion 6a after expanding the expanded portion 6a. In this case, the expanded portion 6a returns to its original shape. [Explanation of symbols]

[0075] 1...packaging box, 2...cylindrical body, 3...top flap, 4...bottom flap, 5...right side wall (plate-shaped member), 6...front wall (plate-shaped member), 7...left side wall (plate-shaped member), 8...rear wall (plate-shaped member), 10...paperboard for packaging box, 11...connecting piece, 20...window portion, 21 window-provision portion, 22...insertion opening, 23...cross insertion opening, 23a...unit cut, 23b...bent cut, 23c...auxiliary cut, 30...cutter, 31...gripping portion, 32...cutter body, 33...cutting blade, 34...protective member, 101-105...insertion portion, 101a, 103a, 104a, 105a...cross insertion opening, 101b, 102a...insertion opening, 101c, 102d, 103c, 104b, 105c...cutting auxiliary line

Claims

1. Three or more plate-like members are connected to the right side of the right end edge of the connecting piece via a vertical fold line; and flaps that are connected to the upper and lower end edges of the plate-like member via horizontal fold lines and that can seal the open end of a tubular body formed when the connecting piece is attached to the right end of the right-end plate-like member by folding it along each vertical fold line, and the paperboard for a packaging box has a window planned portion where a window portion is to be formed by cutting out a part of the plate-like member, The window portion is It is a polygonal shape, At positions corresponding to the vertices of the polygonal shape, insertion openings are formed for inserting protective members fixed to the cutting edge of the cutter blade to cover the cutting edge from the front side to the back side of the packaging box paperboard, The paperboard for packaging boxes is characterized in that the area between the insertion openings formed at each vertex on the virtual line corresponding to the side of the polygonal shape is an unprocessed area in which no openings or perforations are formed.

2. The paperboard for packaging boxes according to claim 1, The paperboard for packaging boxes is characterized in that intersecting insertion openings formed by overlapping a plurality of the insertion openings are provided at positions corresponding to the vertices of the polygonal shape.

3. The paperboard for packaging boxes according to claim 2, The cross insertion port is a pair of unit cuts extending along two sides constituting vertices of the polygonal shape and having a length equal to or greater than the length of the protective member in a direction along the cutting edge, the unit cuts being bent by being connected at the vertices; and auxiliary cuts extending across each end of the pair of unit cuts and having a length equal to or greater than the width of the protective member in the direction intersecting the cutting edge.

4. The paperboard for packaging boxes according to claim 3, A paperboard for packaging boxes, characterized in that an auxiliary cut extending from one of the unit cuts constituting the bending cut to the end connected to the other unit cut has at least a portion thereof overlapping with the other unit cut.

5. The paperboard for packaging boxes according to any one of claims 1 to 4, A paperboard for packaging boxes, characterized in that cutting assistance lines that guide the cutting direction along the sides of the polygonal shape are printed on the surface of the plate-like member.

Images