JP7742043B2 - Packing box and packing box containing roll - Google Patents

Description

This embodiment relates to a packaging box and a packaging box containing a roll.

Conventionally, known methods for packaging and transporting large rolls include a method in which the core of the roll is suspended by a metal frame rack (see, for example, Patent Document 1) and a method in which the roll is packaged using wooden boards or frames. However, using a metal frame rack is expensive, and while it may be used for commuting within the same country, it is rarely used as packaging for overseas export. Furthermore, when packaging using wooden boards or frames is exported overseas, fumigation treatment is required to prevent insects, which increases costs. For this reason, corrugated cardboard packages have recently been used as packaging for overseas export, and various innovations and improvements have been made to improve the strength of corrugated cardboard packages.

In a conventional cardboard packaging body, as disclosed in Patent Document 2, for example, a core of a roll body is supported by a bearing portion cut into a U-shape, and a curved roll plate is used to support the roll additionally.

Japanese Patent Application Laid-Open No. 2004-161314 Utility Model Registration No. 3088236

The present disclosure provides a packaging box and a packaging box containing a roll that can suppress deformation of the core of the roll.

The packaging box according to this embodiment is a cardboard packaging box comprising a bottom member, a first side plate provided on the bottom member, and a second side plate provided on the bottom member in a position opposite the first side plate, and the first side plate and the second side plate each have a bearing portion that supports the core of the roll body, and below each bearing portion a notch having a width narrower than the width of the bearing portion is formed.

In the packaging box according to this embodiment, the cutout portion has a pair of cutout side portions, and when viewed from the central axis direction of the roll body, the angle formed by the upper end of one of the cutout side portions, the central axis of the roll body, and the upper end of the other cutout side portion may be greater than or equal to 20° and less than or equal to 100°.

In the packaging box according to this embodiment, a third side plate and a fourth side plate may be disposed between the first side plate and the second side plate.

The packaging box according to this embodiment may further include a lid member that covers the roll body.

The packaging box containing a roll according to the present embodiment includes the packaging box according to the present embodiment and a roll housed in the packaging box and having a core, and the core of the roll is
The bearing portion of the packaging box is supported by the bearing portion.

In the packaging box containing the roll according to this embodiment, the weight of the roll may be 100 kg or more and 800 kg or less.

In the packaging box containing the roll according to this embodiment, the cutout may have a cutout bottom, and the roll may be arranged so as not to come into contact with the cutout bottom.

This embodiment makes it possible to suppress deformation of the core of the roll body.

FIG. 2 is an exploded perspective view showing a packaging box and a roll body according to the embodiment. FIG. 2 is a front view showing a packaging box and a roll body according to the embodiment. FIG. 10 is a front view showing a packaging box and a roll body according to a modified example. FIG. 10 is a front view showing the force applied to the core of the roll body. 1 is a graph showing the deformation of the core after a predetermined number of days have passed for each of Example 1, Example 2, and Comparative Example 1. 10 is a graph showing the distribution of pressure applied by the core to the bearing portion for each of Example 1, Example 2, and Comparative Example 1. FIG. 4 is a diagram showing measurement positions of pressure distribution in a bearing portion.

An embodiment will be described below with reference to the drawings. The figures shown below are schematic illustrations. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Furthermore, appropriate modifications can be made without departing from the technical concept. In the figures shown below, identical parts are denoted by the same reference numerals, and some detailed descriptions may be omitted. Furthermore, the numerical values, such as dimensions, and material names of each component described in this specification are examples of an embodiment and are not limited to these. They can be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are intended to include substantially the same state in addition to their strict meanings.

In the following embodiments, the "X direction" refers to a direction perpendicular to the central axis of the roll body and parallel to the floor surface on which the packaging box is placed, and the "Y direction" refers to a direction parallel to the central axis of the roll body. The "Z direction" refers to a direction parallel to the vertical direction. The horizontal plane refers to a plane parallel to the floor surface on which the packaging box is placed and parallel to the XY plane. The "plan view" refers to a view from above in the vertical direction (Z direction), and the "front view" refers to a view from the direction of the central axis of the roll body (Y direction). The "side view" refers to a view from a direction parallel to the horizontal plane and perpendicular to the central axis of the roll body (X direction).

The configurations of the packaging box and the packaging box containing the roll according to this embodiment will be described with reference to FIGS. 1 to 3. FIG.

As shown in FIGS. 1 and 2, the packaging box 10 according to this embodiment is made entirely of cardboard, and is used to support the roll body 50 and to package and transport the roll body 50.

The packaging box 10 includes a bottom member 15, a first side plate 11 provided on the bottom member 15, and a second side plate 12 provided on the bottom member 15 at a position opposite to the first side plate 11. The first side plate 11 and the second side plate 12 are provided on the bottom member 15 at a position opposite to the first side plate 11.
The housing has bearings 21 that support the bearings 1. Below each bearing 21, a notch 22 having a width W2 narrower than the width W1 of the bearing 21 is formed. In addition, a third side plate 13 and a fourth side plate 14 are disposed between the first side plate 11 and the second side plate 12.

The bottom member 15 is a box-shaped member located at the bottom of the packaging box 10. The bottom member 15 may be placed on the floor. The bottom member 15 is made of cardboard and has a bottom surface 15a and a bottom surface 15b.
The bottom surface 15a has a rectangular shape that is elongated in the direction of the central axis CL of the roll body 50 in a plan view. The bottom surface 15a protrudes upward from the peripheral edge of the bottom surface 15a and is formed along the peripheral edge of the bottom surface 15a. The first side plate 11, the second side plate 12, the third side plate 13, and the fourth side plate 14 are provided inside the bottom surface 15b.
are placed.

The first side plate 11 is a plate-shaped member located on the negative side of the packaging box 10 in the Y direction.
The first side plate 11 is provided in an upward direction from the bottom member 15. The first side plate 11 is made of corrugated cardboard and has a generally rectangular shape as a whole when viewed from the front. The first side plate 11 is also provided with a bearing portion 21 that supports the core 51 of the roll body 50. The bearing portion 21 is cut out in a generally U-shape when viewed from the front, and the core 51 of the roll body 50 is inserted inside. The bearing portion 21 is recessed from top to bottom. As shown in FIG. 2, the bearing portion 21 is made up of a pair of bearing side portions 21a, 2
The bearing has a bearing bottom portion 21c that is arc-shaped in front view, and a pair of bearing side portions 21a, 21b that extend upward from both side ends of the bearing bottom portion 21c.

A notch 22 is formed below the bearing portion 21. The notch 22 is cut out from the bearing portion 21 downward in a generally rectangular shape when viewed from the front. That is, the notch 22 is formed in a concave shape that extends downward from the bearing bottom portion 21c side. As shown in FIG. 2, the notch 22 has a pair of notch side portions 22a, 22b and a notch bottom portion 22c.
2b extend upward from both side ends of the notch bottom 22c. The pair of notch side portions 22a, 22b have upper ends 22d, 22e, respectively, which intersect with the bearing bottom 21c. The core 51 of the roll 50 is not accommodated in at least the portion of the notch 22 facing the bearing bottom 21c. Therefore, when the roll 50 is accommodated in the packaging box 10, a space is formed within the notch 22.

As shown in FIG. 1, the thickness t1 of the first side plate 11 may be, for example, 10 mm to 100 mm, preferably 15 mm to 80 mm, and more preferably 20 mm to 70 mm.

The second side plate 12 is a plate-shaped member located on the positive side of the packaging box 10 in the Y direction and extends upward from the bottom member 15. The second side plate 12 is positioned opposite the first side plate 11 in the direction of the central axis CL of the roll 50 (Y direction). The roll 52 of the roll 50 is disposed between the first side plate 11 and the second side plate 12. The second side plate 12 is made of cardboard and has a generally rectangular shape in a front view. The second side plate 12 is formed with a bearing 21 that supports the core 51 of the roll 50. A notch 22 is formed below the bearing 21. The shape, dimensions, and other configurations of the second side plate 12 are generally identical to those of the first side plate 11, and detailed description thereof will be omitted.

The third side plate 13 is a plate-shaped member located on the positive side of the packaging box 10 in the X direction, and stands upright from the bottom member 15. The third side plate 13 is located between the first side plate 11 and the second side plate 12, and holds the first side plate 11 and the second side plate 12 so that they do not fall inward of the packaging box 10. The third side plate 13 is made of cardboard and has a rectangular shape in a side view.

The fourth side plate 14 is a plate-shaped member located on the negative side of the packaging box 10 in the X direction.
The fourth side plate 14 is provided in an upright position from the bottom member 15. The fourth side plate 14 is connected to the first side plate 11 and the second side plate 12.
The fourth side plate 14 is located between the first and second side plates 11 and 12 and holds the first and second side plates 11 and 12 so as to prevent them from falling inside the packaging box 10. The fourth side plate 14 is made of cardboard and has a rectangular shape in side view. The fourth side plate 14 is located opposite the third side plate 13 in the X direction. The roll 52 of the roll body 50 is located between the third side plate 13 and the fourth side plate 14.

The shape, dimensions, and other configuration of the third side plate 13 may be substantially the same as the configuration of the fourth side plate 14. Furthermore, the third side plate 13 and the fourth side plate 14 do not necessarily have to be provided as long as the first side plate 11 and the second side plate 12 can be held in place so as not to fall inward.

On the top surface of the packaging box 10, a roll body 5 is accommodated between a first side plate 11 and a second side plate 12.
A lid member 16 is arranged to cover the roll body 50. The lid member 16 is the member located at the top of the packaging box 10. The lid member 16 is made of cardboard and has a top surface 16a and a lid outer periphery 16b located on the periphery of the top surface 16a. The top surface 16a has a rectangular shape that is elongated in the direction of the central axis CL of the roll body 50 in a plan view. The lid outer periphery 16b extends downward from the periphery of the top surface 16a and is formed along the periphery of the top surface 16a. The lid member 16 is
The roll body 50 is fitted around the first side plate 11 and the second side plate 12. In this way, the roll body 50 is covered with the lid member 16. The lid member 16 does not necessarily have to be provided.

The roll body 50 is housed in the packaging box 10 and has a core 51 and a roll 52 wound around the core 51.

The core 51 is substantially cylindrical and is slightly deformed into a cylindrical shape by the load of the roll 52. The core 51 may be, for example, a cardboard tube. The outer diameter D1 of the core 51 (see FIG. 2) may be, for example, 100 mm or more and 400 mm or less, and preferably 125 mm or more and 300 mm or less.
The thickness t2 (see FIG. 2) of the core 51 may be, for example, 10 mm or more and 40 mm or less, and preferably 100 mm or more and 250 mm or less.
The thickness t2 of the core 51 is preferably 5 mm or more and 30 mm or less, more preferably 17 mm or more and 22 mm or less. According to this embodiment, as will be described later, it is possible to suppress deformation of the core 51 even when a load from the roll 52 is applied, so that the thickness t2 of the core 51 can be made thin.

The roll 52 is, for example, a long film or paper wound around the core 51. Examples of the film constituting the roll 52 include polyolefin-based films, polyester-based films, nylon-based films, elastomer-based films, rubber-based films, engineering plastic-based films, vinyl chloride-based films, cellulose-based films,
Engineering plastic films, display films, solar cell films, vapor deposition films,
It may be a release film, an adhesive film laminated with a release film, or a laminate film laminated with films.

As shown in FIG. 1, the length L1 of the core 51 may be, for example, 1000 mm or more and 3200 mm or less, preferably 1600 mm or more and 2600 mm or less, and more preferably 1
The length L1 of the core 51 and the length L2 of the roll 52 are measured along the central axis CL of the roll body 50.

The weight of the roll body 50 (total weight of the roll 52 and the core 51) may be, for example, 100 kg or more and 800 kg or less, preferably 300 kg or more and 600 kg or less, and more preferably 400 kg or more and 500 kg or less.

In this way, the packaging box 10 and the roll 50 accommodated in the packaging box 10 constitute the packaging box 30 containing the roll. In this case, the core 51 of the roll 50 is supported by the bearing portion 21 of the packaging box 10. On the other hand, the core 51 of the roll 50 and the notch bottom 22c of the notch 22 are in contact with each other.
In this embodiment, the roll-containing packing box 3
0 is also provided. Note that a plurality of roll-containing packaging boxes 30 may be stacked one on top of the other.

2 shows the bearing portion 21 in a state in which the core 51 of the roll body 50 is housed, as viewed from the direction of the central axis CL of the roll body 50 (front direction).
The width W1 of the notch 22 is slightly wider than the outer diameter D1 of the core 51. The width W2 of the notch 22 is narrower than the width W1 of the bearing portion 21. Here, the width W1 of the bearing portion 21 refers to the distance between the intersections of a horizontal plane passing through the central axis CL of the core 51 accommodated in the bearing portion 21 and the pair of bearing side portions 21a, 21b. The width W2 of the notch 22 refers to the distance between the intersections of the pair of notch side portions 22a, 22b.
The width W2 of the notch 22 is narrower than the width W1 of the bearing portion 21, so that the core 51 does not come into direct contact with the notch bottom 22c of the notch 22. As a result, as will be described later, the load of the roll body 50 can be distributed to the left and right, and the stress that deforms the core 51 can be distributed, making it possible to suppress deformation of the roll body 50.

As shown in FIG. 2, when viewed from the direction of the central axis CL (when viewed from the front), one of the notched side portions 22a
The angle θ is defined as the angle formed by the upper end 22d of the bearing 21, the central axis CL of the roll body 50, and the upper end 22e of the other notch side portion 22b. In this case, the angle θ may be 20° or more and 100° or less, preferably 21° or more and 90° or less, and more preferably 22° or more and 80° or less. In general, the width W1 of the bearing 21 is determined in advance according to the outer diameter D1 of the core 51.
By setting the width W2 of the notch 22 relative to the width W1 of the core 51 so that the angle θ is within the above range, the stress that deforms the core 51 can be dispersed, as will be described later, and the roll body 5
The deformation of 0 can be suppressed.

The width W1 of the bearing portion 21 may be, for example, 90 mm to 400 mm, preferably 125 mm to 300 mm, and more preferably 150 mm to 250 mm. The width W2 of the cutout 22 may be, for example, 20 mm to 200 mm, preferably 50 mm to 160 mm, and more preferably 80 mm to 120 mm. The height H1 of the cutout 22 is a distance that prevents the core 51 from contacting the cutout bottom 22c, and may be, for example, 1 mm to 75 mm.

3, the pair of bearing side portions 21a, 21b may be inclined with respect to the vertical direction (Z direction). In this case, the distance between the pair of bearing side portions 21a, 21b may increase from bottom to top. This makes it easier to insert the core 51 into the bearing portion 21 from top to bottom.

Next, we will describe the operation of this embodiment configured as described above.

First, prepare the packaging box 10 before storing the roll body 50.

Next, a roll body 50 having a roll 52 and a core 51 is prepared, and the roll body 50 is housed in the packaging box 10. During this process, a pair of chucking devices (not shown) are attached to the core 51, respectively.
The roll body 50 is then lifted up by a crane or other means. Next, both ends of the core 51 of the roll body 50 are inserted from above into the bearing portions 21 of the first side plate 11 and the second side plate 12, respectively. Thereafter, the chucking device is removed from the core 51.

In this way, a packaging box 30 containing a roll body is obtained, which includes the packaging box 10 and the roll body 50 accommodated in the packaging box 10. Thereafter, the packaging box 30 containing a roll body is stored for a predetermined period of time or transported to another location.

In this way, the roll body 50 is accommodated in the packaging box 10, and after a certain time has passed, the bearing portion 21
It is conceivable that the core 51 of the roll body 50 may be deformed by the weight of the roll 52. In particular, when a heavy roll body 50 is stored or transported, the shape of the bearing portion 21 may have an effect, which may cause the core 51 of the roll body 50 to be deformed. Generally, the width W1 of the bearing portion 21 must be somewhat larger than the outer diameter D1 (see FIG. 2) of the core 51 in order to make it easier to remove the roll body 50. Therefore, when a heavy roll body 50 is stored or transported, the core 51 may be deformed by the weight of the roll 52. Specifically, the outer diameter of the core 51 in the horizontal direction may be deformed so as to bulge out more than the outer diameter of the core 51 in the vertical direction. In this case,
When the roll body 50 is removed from the packaging box 10, there is a risk that a problem will occur, such as the core 51 not being able to enter the chucking device.

In contrast, according to the present embodiment, a notch 22 having a width W2 narrower than the width W1 of the bearing 21 is formed below the bearing 21. This distributes the load of the roll body 50 in the left-right direction when viewed from the front, and distributes the stress that deforms the core 51, thereby suppressing deformation of the core 51.

That is, according to this embodiment, as shown in Figure 4(a), a notch 22 is formed below the bearing portion 21, and the core 51 does not come into contact with the notch bottom 22c of the notch 22. Therefore, the force Mg acting on the core 51 from above to below in the vertical direction, which tries to crush the core 51, can be canceled out by the oblique forces N acting from both sides of the bearing portion 21. As a result, the forces that try to deform the core 51 from above and below can be reduced, and deformation of the core 51 can be alleviated.

On the other hand, as a comparative example, when the notch 22 is not formed below the bearing portion 21 as shown in FIG. 4B, the weight of the core 51 is supported by the lower portion of the bearing portion 21. Therefore, the force Mg acting on the core 51 from above to below in the vertical direction, which tries to crush the core 51, is
This is cancelled out by a force N directed vertically upward from the lower part of the bearing part 21. As a result, the forces that tend to deform the core 51 from above and below act strongly, resulting in a large deformation of the core 51.

According to this embodiment, a notch 22 having a width W2 narrower than the width W1 of the bearing portion 21 is formed below the bearing portion 21, so that deformation of the core 51 can be suppressed even when the load of the roll body 50 is applied.

According to the present embodiment, the angle θ formed by the upper end 22d of one of the notched side portions 22a, the central axis CL of the roll body 50, and the upper end 22e of the other notched side portion 22b is 20° or more and 100° or less.
This allows the stress that deforms the core 51 to be dispersed, and the roll body 5
Therefore, deformation of the 0 can be more effectively suppressed.

[Example]
Next, a specific example of this embodiment will be described.

Example 1
A packaging box having the configuration shown in Figures 1 and 2 was produced. In this case, the thickness of the first side plate and the second side plate was 40 mm, the width W1 of the bearing portion was 202 mm, and the width W2 of the notch portion was 1.
The roll body was housed in this packaging box. The roll body weighed 430 kg.
The core length L1 was 2030 mm.
The outer diameter D1 of the core is 203 mm, and the thickness t2 of the core is 21.5
The core deformation was measured after a predetermined number of days had passed. The core deformation was measured by dividing the inner diameter of the core in the horizontal direction (X direction) by the inner diameter of the core in the vertical direction (Z direction).
The difference between the inner diameter in the horizontal direction and the inner diameter in the vertical direction (inner diameter in the horizontal direction - inner diameter in the vertical direction) was calculated.

Example 2
A packaging box was produced in the same manner as in Example 1, except that the width W2 of the cutout portion was set to 50 mm and the angle θ was set to 28°, and the deformation amount of the core was measured after a predetermined number of days had passed since the roll body was placed inside.

(Comparative Example 1)
A packaging box was produced in the same manner as in Example 1, except that no notch was provided, and the deformation of the core was measured after a predetermined number of days had passed since the roll body was housed inside.

FIG. 5 and Table 1 show the deformation of the core after a predetermined number of days have passed, that is, the difference between the inner diameter of the core in the horizontal direction and the inner diameter of the core in the vertical direction.

As shown in Figure 5 and Table 1, the amount of deformation of the core after a certain number of days was smallest for the core of Example 1, followed by the core of Example 2, and largest for the core of Comparative Example 1. Thus, by providing the notches in the first and second side plates, it was possible to suppress deformation of the core.

Next, for each of the above-described Examples 1, 2, and Comparative Example 1, the pressure distribution in the bearing portion immediately after the roll body was accommodated was measured. In this case, a surface pressure distribution measurement system (Nitta, I-SCAN210(H)) was used, and the sensor sheet was attached to the bearing portion to measure the pressure. The pressure was measured by defining a position vertically below the central axis CL of the roll body as 0° (center).
When the angle from the center is -70° to 70° (total 140°),
That is, as shown in FIG. 7, the angle α between the line segment L0 and the line segment La was −70
The pressure was measured at 44 points in the range of -70° to 70° (-70°≦α≦70°).
The line segment L0 is a line segment that extends vertically downward from the central axis CL (α=0°).
The symbol a denotes a line segment connecting the central axis CL and the measurement point Pa. The pressure was the average value of five points in the thickness direction of the bearing portion. Figure 6 shows the pressure distribution for each of Example 1, Example 2, and Comparative Example 1, where the angle α from the center is in the angular range of -70° to 70° (total 140°).

As shown in Figure 6, the core of Example 1 had pressure peaks at positions where the angle α from the center was approximately ±50°, the core of Example 2 had pressure peaks at positions where the angle α from the center was approximately ±35°, and the core of Comparative Example 1 had pressure peaks at positions where the angle α from the center was approximately ±10°. This shows that the provision of notches in the first and second side plates distributes the pressure applied to the core.

It is also possible to combine the multiple components disclosed in the above-described embodiments and modifications as needed, or to delete some of the components disclosed in the above-described embodiments and modifications.

REFERENCE SIGNS LIST 10 Packing box 11 First side plate 12 Second side plate 13 Third side plate 14 Fourth side plate 15 Bottom member 16 Lid member 21 Bearing portion 22 Notch portion 50 Roll body 51 Core 52 Roll

Claims (4)

A cardboard packaging box,
A bottom member;
a first side plate provided on the bottom member; and a second side plate provided on the bottom member at a position opposite to the first side plate,
the first side plate and the second side plate each have a bearing portion that supports a core of a roll body,
The bearing portion has a bearing bottom portion that is arc-shaped in a front view,
A notch having a width narrower than the width of each bearing portion is formed below each bearing portion, and the core is made of paper.
A packaging box containing the roll body, wherein the core has an outer diameter of 203 mm, a wall thickness of 21.5 mm, a weight of 430 kg , and a roll length of 2030 mm , and after 45 days have passed, the difference between the inner diameter of the core in the horizontal direction and the inner diameter of the core in the vertical direction is 0.40 mm or less. The width of the bearing portion is 90 mm or more and 400 mm or less,
The width of the notch is 20 mm or more and 200 mm or less,
The packaging box according to claim 1 , wherein the height of the notch is equal to or greater than 1 mm and equal to or less than 75 mm. The packaging box of claim 1 or 2, wherein the cutout portion has a pair of cutout side portions, and when viewed in the direction of the central axis of the roll body, the angle formed by the upper end of one of the cutout side portions, the central axis of the roll body, and the upper end of the other cutout side portion is between 20° and 100°. A packaging box according to any one of claims 1 to 3, wherein a third side panel and a fourth side panel are disposed between the first side panel and the second side panel.