JP6174421B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box having a structure capable of realizing load resistance by suppressing the occurrence of swelling and buckling.

  Conventionally, when a product is stored in a warehouse or the like, a plurality of packaging boxes containing the product are generally stacked and stored. When packaging boxes are stacked in this way, it is a phenomenon in which the packaging boxes are compressed and their side surfaces expand due to, for example, storage for a long period of time or the weight of the product in each packaging box being excessive. In some cases, a phenomenon such as “buffing” or “buckling”, which is a phenomenon caused by crushing the packaging box, may occur.

  In the packaging outer box described in Patent Document 1, a bending guide wire is provided between two peripheral side walls having a larger area among the four peripheral side walls and an outer lid connected to the peripheral side walls. It has been. The bending guide line is formed to be curved in an arc shape from both ends (projections) to the middle. In the case where a plurality of packaging outer boxes are stacked, each packaging outer box receives a load due to the stacking only at a corner portion by a protrusion of the packaging outer box. That is, since a load is not applied to the intermediate portion in the longitudinal direction of these packaging outer boxes, the problems of swelling and buckling are solved (see, for example, the specification, page 2, line 18 to page 3, line 16). ).

  The ruled line of the side plate of the cardboard packaging box described in Patent Document 2 is formed in a V shape or an arc shape, or is formed so that both ends are arced and the intermediate portion is linear (for example, (See paragraphs [0014], [0018], FIGS. 1-4, etc.) in the specification.)

Japanese Utility Model Publication No. 56-24614 JP 2007-39090 A

  Various types of packaging boxes having a structure with excellent load resistance have been proposed in this way, but in order to prevent torsion and buckling without increasing the material cost of the packaging box, Further ingenuity is required in the structure.

  An object of the present invention is to provide a packaging box that has excellent load resistance and can suppress the occurrence of swelling and buckling.

In order to achieve the above object, a packaging box according to the present invention includes a plurality of side plates and a plurality of plates.
The plurality of side plates have both ends in the vertical direction and both side ends in the horizontal direction.
The plurality of plates are extended through end ruled lines that form the both ends in the vertical direction.
The first ruled line, which is at least one of the end ruled lines, includes at least one end point between two end points that are intersections of the first ruled line and the line forming the both side ends, and at least one between the two end points. It is composed of lines connecting points that are points.
The intermediate point is displaced from the straight line connecting the two end points to the center side in the vertical direction of the side plate.
A pair of side plates facing at least one of the plurality of side plates has a second ruled line connecting the intermediate point of the first ruled line and the end ruled line facing the first ruled line in the vertical direction. .

  With such a configuration, a concave shape is formed at the end of the side plate formed by the first ruled line. Further, in each side plate, since the second ruled line is a line including a vertical component, it is difficult to form a horizontal line on the side plate. As a result, it is possible to suppress the occurrence of swelling and buckling, and it is possible to realize a packaging box with more excellent load resistance.

  The second ruled line may be provided along the vertical direction of the side plate. Thereby, since a 2nd ruled line functions as a substantially perpendicular | vertical pillar, load resistance can further be improved.

  In the first ruled line, a line connecting the two end points to the intermediate point may be formed in a straight line or an arc shape.

  The first ruled line may have two or more intermediate points between the two end points. Thereby, the number of 2nd ruled lines can be set according to the number of points, and the number of the surfaces which a side board contains can be adjusted. When a plurality of second ruled lines are formed, for example, the plurality of first ruled lines may be arranged so as not to cross each other at a position other than the intermediate point on the side plate.

  The side plate has a pair of the first ruled lines facing each other at the both ends in the vertical direction, and the second ruled line is provided so as to connect the intermediate points of the pair of first ruled lines. May be. In the present invention, since the first ruled line is provided on both the upper and lower end ruled lines, and the second ruled line is provided between them, the load resistance can be further improved.

  The intermediate points of the pair of first ruled lines may be arranged at the same position in the horizontal direction. Thereby, since the 2nd ruled line which connects those points is formed along an up-down direction, the 2nd ruled line can function as a substantially perpendicular | vertical pillar, and can improve load resistance.

  When the plurality of plates are a plurality of inner flaps and a plurality of outer flaps constituting the top plate and the bottom plate of the packaging box, the outer flaps may be configured as follows. That is, of the plurality of outer flaps, a pair of outer flaps constituting the top plate, a pair of outer flaps constituting the bottom plate, or all the outer flaps in the horizontal direction as they are separated from the side plate. You may have a taper part which makes a width | variety small. Thereby, since it becomes difficult to receive a load in the taper part of an outer flap, it contributes to suppression of the trunk swelling and buckling of a packaging box.

A packaging box according to another embodiment of the present invention includes a plurality of side plates, a plurality of inner flaps, and a plurality of outer flaps.
The plurality of side plates have both ends in the vertical direction and both side ends in the horizontal direction.
The plurality of inner flaps and the plurality of outer flaps constitute a top plate and a bottom plate that are extended through end ruled lines that respectively form the both ends in the vertical direction.
The first ruled line, which is at least one of the end ruled lines, includes at least one end point between two end points that are intersections of the first ruled line and the line forming the both side ends, and at least one between the two end points. It is composed of lines connecting points that are points.
The intermediate point is displaced from the straight line connecting the two end points to the center side in the vertical direction of the side plate.
Of the plurality of outer flaps, a pair of outer flaps constituting the top plate, a pair of outer flaps constituting the bottom plate, or all the outer flaps have a width in the horizontal direction as they are separated from the side plate. It has a taper part which makes it small.

  According to the present invention, a side plate having a concave shape is formed on at least one of both ends in the vertical direction, so that the occurrence of swelling and buckling can be suppressed, and a packaging box with higher load resistance can be realized. can do. Moreover, since it becomes difficult to receive a load in the taper part of an outer flap, it contributes to suppression of the swelling and buckling of a packaging box.

  As described above, according to the present invention, a packaging box having excellent load resistance can be realized, and the occurrence of swelling and buckling can be suppressed.

FIG. 1 is a perspective view showing a packaging box according to the first embodiment of the present invention. FIG. 2 is a plan view of the packaging box shown in FIG. FIG. 3 is a side view of the packaging box as viewed in the y direction in FIG. 1. FIG. 4 is a developed view of the packaging box shown in FIG. FIG. 5 is a development view mainly showing one side plate shown in FIG. 4 and outer flaps provided above and below the side plate. FIG. 6 is a perspective view showing a packaging box according to the second embodiment of the present invention. FIG. 7 is a development view showing the packaging box. FIG. 8 is a perspective view showing a wrap-around packaging box according to the third embodiment of the present invention. FIG. 9 is a development view of the packaging box shown in FIG. 10A-E show the shapes of the side plates of the packaging box according to various other embodiments. FIG. 11A and 11B are the top views and the side views seen in the y direction which show the packaging box based on the 4th Embodiment of this invention. FIG. 12 is a perspective view showing a packaging box according to the fifth embodiment of the present invention. FIG. 13 is a development view of the packaging box shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1. First embodiment

(1) Configuration of Packaging Box FIG. 1 is a perspective view showing a packaging box according to the first embodiment of the present invention. FIG. 2 is a plan view showing the packaging box 100. FIG. 3 is a side view of the packaging box 100 viewed in the y direction in FIG. FIG. 4 is a development view showing the packaging box 100.

  The packaging box 100 is composed of A-type corrugated cardboard represented by a so-called mandarin orange box. As the corrugated paper, A, B, C, E flute and the like can be appropriately used.

As shown in FIG. 1, the packaging box 100 includes a top plate 10, a bottom plate 20 (see FIG. 3), and a plurality of side plates 30. As shown in FIG. 4, four side plates 30 are connected in the horizontal direction (x direction in FIG. 4), and are composed of side plates 31, 32, 31, 32. Each side plate 30 is divided into two sides by the Ru is formed along the vertical direction toward the rear Assemble viewed as will be described later border (second border).

The width of the side plate 31 in the horizontal direction is longer than that of the side plate 32. The side plate 31 has an upper end 34 and a lower end 35 that are both ends in the vertical direction (z direction) in FIG. 1 and both side ends 39 and 39 that are ends in the x direction. Similarly, the side plate 32 has an upper end 36 and a lower end 37 that are both ends in the vertical direction, and both side ends 39 and 39 that are ends in the x direction.

Outer flaps 14 (a plurality of plates) extend from the side plate 31 via an upper end 34 and a lower end 35, respectively. Further, the inner flap 16 (a plurality of plates) is extended from the side plate 32 via an upper end 36 and a lower end 37, respectively. Outer flap 14 is provided corresponding to the horizontal length of the side plate 31 (the distance between both side ends 39, 39), the inner flap 16, the horizontal length of the side plates 32 (between both side ends 39 and 39 of Distance).

  The top plate 10 is configured by the pair of outer flaps 14 and the pair of inner flaps 16 provided on the upper end 34 side of the side plate 31 and the upper end 36 side of the side plate 32. On the other hand, the bottom plate 20 is constituted by the pair of outer flaps 14 and the pair of inner flaps 16 provided on the lower end 35 side of the side plate 31 and the lower end 37 side of the side plate 32. Specifically, when the packaging box 100 is assembled, the inner flap 16 is folded first, and then the outer flap 14 is folded, whereby the top plate 10 and the bottom plate 20 are formed.

  As shown in FIG. 4, a sticking portion (paste margin) 15 is extended from the side plate 31 via a side end 39 of the side plate 31 provided at the end portion in the x direction. The sticking part 15 is stuck to the back side of the side plate 32 provided at the end in the x direction. The adhesive part 15 is attached to the side plate 32 by applying an adhesive, for example. The connection means between the sticking portion 15 and the side plate 32 is not limited to chemical connection means such as an adhesive, and mechanical connection means such as screws and staples may be used.

  As shown in FIG. 4, at the boundary between each side plate 31 and each of the flaps 14 and 16, an upper ruled line 34 ′ (first ruled line) and a lower ruled line 35 ′, which are end ruled lines constituting the upper end 34 and the lower end 35, respectively. (First ruled line) is provided. Similarly, an upper ruled line 36 ′ and a lower ruled line 37 ′ that respectively constitute an upper end 36 and a lower end 37 are provided at the boundary between each side plate 32 and each of the flaps 14 and 16.

  FIG. 5 is a developed view mainly showing, for example, the side plate 31 and the outer flaps 14 provided above and below the side plate 31. The upper ruled line 34 'is a line connecting two end points T1 that are the intersections of the upper end 34 and both side ends 39 and 39 of the side plate 30 and an intermediate point T2 that is one point between the two end points T1. Composed. Similarly, the lower ruled line 35 ′ is a line connecting two end points T 1 that are the intersections of the lower end 35 and both side ends 39 and 39 and an intermediate point T 2 that is one point between the two end points T 1. Composed.

  These midpoints T2 are shifted from the straight line S connecting the two end points T1 to the center side in the vertical direction of the side plate 30. That is, the upper ruled line 34 ′ is formed in a V shape composed of two straight lines, and similarly, the lower ruled line 35 ′ is formed in a V shape composed of two straight lines, and the upper ruled line 34 ′ and the lower ruled line 35 are formed. 'Has a line-symmetric shape with respect to the x-axis. The upper ruled line 34 'and the lower ruled line 35' are configured as a pair of first ruled lines.

  The distance from the straight line S to the intermediate point T2 is set to 5 mm, but this can be appropriately changed according to the size of the packaging box 100 and the like. The angle α between the straight line S and the upper ruled line 34 ′ is set to 2 to 10 °, and is appropriately changed according to the material of the corrugated cardboard used, the maximum weight of the product to be stored, and the like. The angle α is more preferably 3 to 7 °.

  The side plate 31 is formed with a ruled line 41 in the vertical direction that connects these inter-points T2. As a result, two non-parallel surfaces 31 a and 31 b are formed on the side plate 31.

  As shown in FIG. 4, the upper end 36 and the lower end 37 of the side plate 32 are formed by the V-shaped upper ruled line 36 ′ and the lower ruled line 37 ′ similarly to the configuration of the side plate 31. Further, the side plate 32 is formed with vertical ruled lines 42 that connect the intermediate points T2 between the upper end 36 and the lower end 37, thereby forming two non-parallel surfaces 32a and 32b.

These ruled lines 41 and 42 may be formed on the front surface side, that is, the outer surface side of the side plate 30 , or may be formed on the back surface side, that is, the inner surface side. Or you may form in both the front surface and the back surface.

  In this way, the upper end 34 (36) of the side plate 30 is formed in a concave shape (here, V-shaped), and the lower end 35 (37) is also formed in a concave shape (upwardly convex shape, here is an inverted V-shape). As shown in FIG. 3, a gap g <b> 1 is formed in the center portion of the lower end 35 with respect to the floor surface 6, and a load is mainly applied to the corner portion D of the bottom plate 20 of the packaging box 100.

  That is, when the packaging box 100 is viewed in a plane as shown in FIG. 2, a load is preferentially applied to the four corners D of the bottom plate 20. When the packaging boxes 100 are stacked in a plurality of layers, the top plate 10 is similarly preferentially applied with loads on the four corners D.

  Usually, in such a type A cardboard box, the corner portion is most excellent in load resistance. As the distance from the corner portion along the ridge line (upper end and lower end) of the box decreases, the load resistance decreases, that is, the strength decreases, and swelling of the body tends to occur. On the other hand, in the packaging box 100 according to the present embodiment, as the distance from the corner portion D along the ridgeline (upper end 34, 35, lower end 36, 37) of the box increases, the ridgeline moves toward the center in the vertical direction. , The center side of the ridge line is less likely to receive a load. As a result, the occurrence of swelling and buckling can be suppressed.

  Further, the side plate 30 according to the present embodiment is formed with vertical ruled lines 41 and 42 that connect the point T2 to each other, so that the ruled lines 41 and 42 function as substantially vertical columns, and the packaging box 100 Even when a load is applied, a horizontal line is hardly formed on the side plate 30. In other words, since the side plate 30 is composed of two non-parallel surfaces (31a, 31b, 32a, 32b), it is extremely heavy load to fold the two surfaces at the same horizontal line at the same time. Is not possible unless it is added to the packaging box 100. With such a configuration of the packaging box 100, it is possible to suppress the occurrence of body swelling and buckling, and it is possible to realize a packaging box with more excellent load resistance.

  As shown in FIGS. 4 and 5, the outer flap 14 has a tapered portion 14 a formed so that the width in the x direction decreases as the distance from the side plate 30 increases in the extending direction from the side plate 31. That is, the outer flap 14 is formed by cutting the corners at both ends in the x direction so that the horizontal width of the outer flap 14 is the smallest at the tip. The tapered portion 14a is formed from the middle of the sides at both ends to the tip.

  As shown in FIG. 5, the front end of the outer flap 14 is cut by a length b in the x direction, but this value can be appropriately changed according to the size of the packaging box 100 and the like. The length b is 5 mm, for example. The taper angle β of the outer flap 14 is set to 2 to 10 °, but this can also be changed as appropriate. More preferably, it is 3 to 7 °.

  In a general A-type cardboard box, a load is applied substantially evenly to the rectangular ridgeline defining the outer shape of the bottom plate 20. On the other hand, in the top plate 10 and the bottom plate 20 according to the present embodiment, both ends of the outer flap 14 are displaced from the general rectangular ridgeline in the horizontal direction toward the center side of the packaging box 100 (FIG. 2). See), both ends of the outer flap 14 are less likely to receive a load.

  In other words, the V-shaped upper end 34 and lower end 35 of the side plate 31 described above are provided, and the tapered portions 14a are provided at both ends of the outer flap 14, so that the top plate as shown in FIG. In the horizontal center of 10 (and the bottom plate 20), a gap g2 is formed in both the vertical and horizontal directions. Therefore, in this packaging box 100, the area | region of the space | gap g2 can be enlarged compared with the form in which the taper part 14a is not provided in the both ends of the outer flap 14. FIG. Thereby, the both ends of the outer flap 14 become difficult to receive a load, and it contributes to suppression of trunk swelling and buckling in the x direction.

  Also, with such a configuration, both ends in the x direction of the outer flap 14 are directed toward the inner flap 16 by the load (that is, toward the intermediate point T2 of the side plate 32), as compared with a configuration in which the outer flap is not provided with a tapered portion. ) The problem of bending is less likely to occur.

(2) Verification of load resistance The inventors verified the load resistance of the packaging box 100 according to the present embodiment.

  As an experiment method, in the following two contents (Experiments 1 and 2), the value (mm) of the swelling of at least one of both x and y is measured. The value of the swelling of the trunk was defined as the difference between the dimension of the packaging box in a state where no load was applied to the packaging box and the dimension of the packaging box after the swelling of the trunk occurred.

(A) Experiment 1
In Experiment 1, a 500 ml PET bottled beverage was packed in a packaging box, and the packaging box was placed in a room at a temperature of 30 ° C. and a relative humidity of 80% with a load of 210 kgf applied from above. Left for days. B flute corrugated paper is used as the packaging box material, and the material is [C5 (cover) × S120 (core) × C5 (backing paper)].

  In order to compare the packaging box according to the present embodiment with a general A-type cardboard box, the material of [K5 (cover) x S160 (core) x K5 (back))] of the B flute of the A type Corrugated paper was given the same environment as above. Comparing corrugated paper using C5 paper and corrugated paper using K6 paper, K6 is superior in load resistance to C5. Moreover, the larger the numerical value of S of the core, the better the load resistance.

  In Experiment 1, the following results were obtained.

General A type cardboard box: 20mm (x direction), 20mm (y direction)
Packaging box according to this embodiment: 4 mm (x direction), 7 mm (y direction)

(B) Experiment 2
In Experiment 2, the packaging box was filled with 2L PET bottled beverages, and a load of 110 kgf was applied to the packaging box from above, and the packaging box was placed in a room at 30 ° C and 80% relative humidity. Left for days. A flute cardboard is used as a material for the packaging box 100, and the material is K6 (cover) × S120 (core) × K6 (backing paper).

  In order to compare the packaging box according to this embodiment with a general A type cardboard box, the A type of the A flute with a material of [K6 (cover) × reinforced 180 (center core) × K6 (backing paper)] is used. The same environment as above was given to the corrugated cardboard. “Reinforcement 180” having a very high strength was used as the core of a general A-type corrugated cardboard according to this comparison object.

  In Experiment 2, the following results were obtained.

General type A cardboard box: buckling (maximum swelling)
Packaging box according to this embodiment: 10 mm (x direction)

  In both Experiments 1 and 2, even when the material of the packaging box according to this embodiment is lowered compared to a general A-type cardboard box, that is, when low-cost corrugated paper with reduced load resistance is used. However, it was confirmed that the swelling value could be suppressed.

  2. Second embodiment

  FIG. 6 is a perspective view showing a packaging box according to the second embodiment of the present invention. FIG. 7 is a development view showing the packaging box 200. In the following description, the description of the same structure and function of the packaging box 100 according to the embodiment shown in FIG. 1 and the like will be simplified or omitted, and different points will be mainly described.

  The packaging box 200 includes four side plates 80 (81, 82, 81, 82), a top plate 60, and a bottom plate 80. The top plate 60 includes outer flaps 54 and 54 and inner flaps 56 and 56. Similarly, the bottom plate 80 includes outer flaps 54 and 54 and inner flaps 56 and 56.

  The upper ruled line 84 ′ that forms the upper end 84 of the side plate 80 according to the packaging box 200 has two end points T1 that are the intersections of both side ends 89 and the upper end of the side plate 81, and two intervals provided between the two end points T1. It has a point T2 and is composed of a straight line connecting these points. In the upper ruled line 84 ', the two intermediate points T2 are shifted from the straight line S connecting the two end points T1 to the center in the vertical direction, that is, downward. Similarly, for the lower ruled line 85 ', the two intermediate points T2 are shifted from the straight line S connecting the two end points T1 toward the center in the vertical direction, that is, upward.

  The two intermediate points T2a and T2b of the upper ruled line 84 'are arranged at the same height position, and the two intermediate points T2a and T2b of the lower ruled line 85' are arranged at the same height position. The two intermediate points T2a and T2b are arranged at positions that divide the straight line S into three equal parts.

  The midpoint T2a of the upper ruled line 84 'and the midpoint T2a of the lower ruled line 85' are arranged at the same position in the horizontal direction. Further, the intermediate point T2b of the upper ruled line 84 'and the intermediate point T2b of the lower ruled line 85' are arranged at the same position in the horizontal direction.

  The side plate 81 is formed with an up-down ruled line 91a that connects the intermediate points T2a and T2a, and a ruled line 91b that connects the intermediate points T2b and T2b. By these ruled lines 91a and 91b, the side plate 81 has three non-parallel surfaces 81a, 81b and 81c in the horizontal direction.

  Similarly to the side plate 81, the side plate 82 also has ruled lines 92a and 92b, and has three non-parallel surfaces 82a, 82b and 82c in the horizontal direction.

  Also in this embodiment, as in the first embodiment, the ridge line becomes a diagonal line toward the center side in the vertical direction as the distance from the corner of the packaging box 200 increases along the ridge line of the box. A horizontal line is formed between the two points T2a and T2b. Therefore, it becomes difficult to receive a load especially in the area around the horizontal line. As a result, the occurrence of swelling and buckling can be suppressed.

  Also, since the side plate 80 according to the present embodiment has three non-parallel surfaces, folding these three surfaces at the same horizontal line at the same time can cause an extremely large load. It will be difficult unless you add 200. With such a configuration, it is possible to suppress the occurrence of swelling and buckling, and it is possible to realize a packaging box with more excellent load resistance.

  In the present embodiment, two midpoints T2a and T2b are provided by one ruled line (upper ruled line 84 'or lower ruled line 85'). However, the designer can also appropriately select the number of interstitial points and the angles of the upper ruled lines and the lower ruled lines according to the design such as the appearance pattern of the packaging box.

  In addition, although the outer flap 54 of the packaging box 200 which concerns on this embodiment does not have the taper part (14a) in the said 1st Embodiment, you may have this.

  3. Third embodiment

  FIG. 8 is a perspective view showing a packaging box according to the third embodiment of the present invention, and shows a wrap-around packaging box. FIG. 9 is a development view thereof.

  The packaging box 300 includes four side plates 130 (131A, 132, 131B, 132), a top plate 110, and a bottom plate 120 (see FIG. 9).

  An upper end 134 and a lower end 135 of the pair of opposing side plates 131A and 131B are formed by V-shaped upper ruled lines 134 'and lower ruled lines 135'. These side plates 131A and 131B are formed with a ruled line 141 in the vertical direction that connects the intermediate points T2. The other two side plates 132 are constituted by an inner flap 116 and an outer flap 114.

  The top plate 110 and the bottom plate 120 are each composed of one plate. The top plate 110 extends from the side plate 131A via an upper ruled line 134 'that forms the upper end 134 of one side plate 131A provided at the end. The top plate 110 is connected to the side plate 131B via a lower ruled line 135 'that forms the lower end 135 of the side plate 131B.

  The bottom plate 120 extends from the side plate 131B via an upper ruled line 134 'that forms the upper end 134 of the side plate 131B. A sticking portion 115 serving as a glue margin extends from the side plate 131A via a lower ruled line 135 'that forms the lower end of the side plate 131A. The sticking part 115 is stuck on the back side of the bottom plate 120.

  According to such a configuration of the packaging box 300, it is possible to mainly suppress the swelling of the side plates 131A and 131B, that is, the occurrence of the swelling and buckling of the packaging box 300 in the y direction (see FIG. 8).

  4). Other embodiments of side plates

  10A-E show the shapes of the side plates of the packaging box according to various other embodiments.

  The upper ruled line midpoint T2 that forms the upper end of the side plate of the packaging box shown in FIG. 10A and the lower ruled line midpoint T3 that forms the lower end are provided at different positions in the horizontal direction. Further, these midpoints T2 and T3 are located at positions other than the center position in the horizontal direction. As a result, the ruled line 51 connecting the points T2 and T3 is formed as an oblique line including the vertical component.

  The upper ruled line that forms the upper end of the side plate of the packaging box shown in FIG. 10B has one point T2 provided at the center in the horizontal direction. The lower ruled line forming the lower end has two intermediate points T3 and T3 at a position shifted from the center in the horizontal direction. The ruled line 51 connecting the point T2 and the two point T3, T3 is formed as two non-parallel diagonal lines including components in the vertical direction.

  The upper ruled line that forms the upper end of the side plate of the packaging box shown in FIG. 10C and the lower ruled line that forms the lower end have, for example, five intermediate points T4. Further, five ruled lines 51 are formed in the vertical direction connecting the intermediate points T4 arranged at the same position in the horizontal direction. The upper ruled line is composed of a total of six straight lines including a first diagonal line a, a horizontal line b, a second diagonal line c, a third diagonal line d, a horizontal line e, and a fourth diagonal line f. The lower ruled line is also composed of six straight lines similar to the upper ruled line.

  In the upper ruled line that forms the upper end of the side plate of the packaging box shown in FIG. 10D and the lower ruled line that forms the lower end, the lines h and h connecting the two end points T1 and the one intermediate point T2 are arcuate. The arc shape is, for example, a circle or an exponential curve. A ruled line 51 connecting the interspace T2 is a straight line in the vertical direction.

  In the packaging box shown in FIG. 10E, the end points T1 and T2 are provided at the same positions as the end points T1 and T2 in the upper ruled line (and the lower ruled line) of the packaging box 200 according to the embodiment shown in FIG. It has been. In this packaging box, the upper ruled line that forms the upper end and the lower ruled line that forms the lower end are each formed in an arc shape like the one shown in FIG. 10D. As the ruled line 51 connecting the interspace T2, a plurality of vertical lines, that is, two straight lines are provided.

  The designer can appropriately select the number of dots, the arrangement, the angle and shape of the upper ruled line and the lower ruled line, the angle of the ruled line 51, and the like according to the design such as the appearance pattern of the packaging box.

  5. Fourth embodiment

  FIG. 11A is a plan view showing a packaging box according to a fourth embodiment of the present invention. FIG. 11B is a side view of the packaging box 500 shown in FIG. 11A viewed in the y direction, which is its short direction.

  The side plate 230 of the packaging box 500 has a concave shape, for example, a V-shaped upper end 234, similarly to the side plates according to the first to third embodiments. The difference from the side plates according to the first to third embodiments is that the side plate 230 has a lower end 235 that is substantially a straight line in the horizontal direction. That is, the lower ruled line 235 ′ forming the lower end 235 coincides with a straight line connecting the two end points (a straight line S shown in FIG. 5).

  The ruled line 241 in the vertical direction is a straight line connecting a point T2 between the upper ruled line 234 'forming the upper end 234 and an arbitrary point constituting the lower ruled line 235'. For example, the ruled line 241 is a straight line connecting the intermediate point T2 and the substantially central point T5 of the lower ruled line 235 ', and is a line along the vertical direction when viewed in the y direction. The upper and lower ends of both side plates 230 provided facing each other in the x direction have the same configuration. According to such a configuration of the packaging box 500, the bottom plate 220 is formed in a rectangular shape.

  According to this embodiment, for example, the designer can design only the shape of the upper end in a concave shape in accordance with the load resistance.

  As a modification of the present embodiment, for example, the lower ruled line that forms the lower end may be a concave shape, and the upper ruled line that forms the upper end may be a line substantially along a straight line in the horizontal direction. That is, only the shape of the lower end can be a concave shape. In other words, the packaging box 500 may be used upside down, that is, the packaging box 500 may be used with the top plate 10 as a bottom plate and the bottom plate 220 as a top plate.

  6). Fifth embodiment

  FIG. 12 is a perspective view showing a packaging box according to the fifth embodiment of the present invention. FIG. 13 is a development view thereof.

  The packaging box 400 according to the present embodiment does not have the ruled lines 41 and 42 including the components in the vertical direction that connect the intermediate points T2 provided on the side plate 30 of the packaging box 100 according to the first embodiment. . Since such ruled lines are not formed, the side plate 180 is formed with one surface, but the one surface is not flat but has a plate shape bent around the center in the horizontal direction.

  The outer flap 214 is formed with a tapered portion 214a as in the first embodiment.

  With such a configuration, side plates having a concave shape are formed at the upper end and the lower end of the packaging box 400, so that the occurrence of swelling and buckling can be suppressed, and a packaging box with more excellent load resistance can be realized. be able to. Moreover, since it becomes difficult to receive a load in the taper part 214a of the outer flap 214, it contributes to suppression of trunk swelling and buckling of a packaging box.

  7). Other embodiments

  The present invention is not limited to the embodiment described above, and other various embodiments can be realized.

  Although corrugated paper is used for the packaging box according to the above embodiment, paper other than corrugated paper, resin, or the like may be used.

  In the first, fourth, and fifth embodiments, all the outer flaps have tapered portions in both the top plate and the bottom plate. However, for example, only a pair of outer flaps constituting the top plate or only a pair of outer flaps constituting the bottom plate may have a tapered portion.

  In the first, second, fourth, and fifth embodiments, the ruled lines including the vertical component are provided on all the side plates. However, the ruled lines may be provided only on at least one pair of opposing side plates. . For example, in the first embodiment, a ruled line may be provided only on the side plates 31 and 31 having a long horizontal width among the side plates 31 and 32.

  It is also possible to combine at least two feature portions among the feature portions of each embodiment described above.

  For example, at least two features in FIGS. 10A-E can be combined.

  It is also possible to replace the side plate of the wrap-around packaging box 300 according to the third embodiment with any one of the side plates according to the embodiment shown in FIGS. 10A to 10E. Alternatively, the shape of the lower end of the packaging box according to the second, third, and fifth embodiments may be replaced with the linear shape of the lower end of the packaging box 500 according to the fourth embodiment. Or you may replace the shape of the upper end which concerns on these 2nd, 3 and 5 embodiment with the linear shape of the upper end of the packaging box which concerns on the modification of 4th Embodiment. Or you may apply the linear shape upper end or lower end of the packaging box which concerns on 4th Embodiment (or its modification) to any one form among FIG. 10A-E.

  A packaging box in which the ruled line 51 is not formed on the side plate according to the embodiment shown in FIGS. 10A to 10E and the taper portion is formed on the flap as in the first embodiment can be realized.

  In the above embodiments, the ruled lines 41, 42, 51, 91a, 91b,... That divide the side plate into a plurality of surfaces are straight lines, but may have a curved line. In this case, it is desirable that the curvature of the curve is relatively small.

10, 60, 110 ... top plate,
14, 54, 114, 214 ... outer flaps,
14a, 114a, 214a ... taper part,
15, 56, 116 ... inner flap,
20, 70, 120, 220 ... bottom plate,
30 (31, 32), 80 (81, 82), 130 (131A, 131B, 132) ... side plate,
34, 36, 84, 134, 136, 234 ... upper end,
34 ', 36', 84 ', 134', 136 ', 234' ... upper ruled line,
35, 37, 85, 135, 137, 235 ... lower end,
35 ', 37', 85 ', 135', 137 ', 235' ... lower ruled line,
39, 89 ... side ends (both ends),
41, 42, 51, 91a, 91b, 92a, 92b, 141, 142, 241 ... ruled lines,
100, 200, 300, 400 ... packaging box,
T1, end point,
T2, T3, T4 ... Intersection

Claims (6)

A plurality of side plates having both ends in the vertical direction and both side ends in the horizontal direction;
A plurality of plates extending through end ruled lines that respectively form the both ends in the vertical direction;
The first ruled line, which is at least one of the end ruled lines, includes at least one end point between two end points that are intersections of the first ruled line and the line forming the both side ends, and at least one between the two end points. Consists of lines connecting points that are points,
The intermediate point is arranged so as to be shifted from the straight line connecting the two end points to the center side in the vertical direction of the side plate,
A pair of side plates facing at least one of the plurality of side plates has a second ruled line connecting the intermediate point of the first ruled line and the end ruled line facing the first ruled line in the vertical direction. And
The plurality of plates are a plurality of inner flaps and a plurality of outer flaps constituting the top plate and the bottom plate of the packaging box,
Of the plurality of outer flaps, a pair of outer flaps constituting the top plate, a pair of outer flaps constituting the bottom plate, or all the outer flaps have a width in the horizontal direction as they are separated from the side plate. A packaging box having a tapered portion to be reduced . The packaging box according to claim 1,
The second ruled line is provided along the vertical direction of the side plate. The packaging box according to claim 1 or 2,
A packaging box in which a line connecting the two end points to the intermediate point in the first ruled line is formed in a straight line or an arc shape. A packaging box according to any one of claims 1 to 3,
The first ruled line has two or more intermediate points between the two end points. The packaging box according to any one of claims 1 to 4,
The side plate has a pair of the first ruled lines facing each other at the both ends in the vertical direction,
The second ruled line is provided so as to connect the intermediate points of the pair of first ruled lines. The packaging box according to claim 5,
The intermediate points of each of the pair of first ruled lines are arranged at the same position in the horizontal direction.

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