JP7503254B2 - Packing box and roll packing box - Google Patents

Description

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

Conventionally, methods for packaging and transporting large roll bodies include a method of suspending the core of the roll body on a metal frame rack for transport (see, for example, Patent Document 1), and a method of packaging the roll body using wooden boards and frames. However, when using metal frame racks, the cost is high, and although they may be used as commuter packages when transporting within the same country, they are rarely used as packages for overseas export. In addition, when packages using wooden boards and frames are exported overseas, fumigation treatment is required as a measure against insects, which leads to increased costs. For this reason, corrugated cardboard packages are now being used as packages for overseas export, and various ideas and improvements have been made to improve the strength of corrugated cardboard packages.

In a conventional cardboard package, as disclosed in Patent Document 2, for example, a U-shaped bearing section supports the core of the roll body, and a curved roll plate is used to support the roll secondarily.

JP 2004-161314 A Utility Model Registration No. 3088236

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

The packaging box according to this embodiment is a cardboard packaging box, and includes 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 the first side plate. 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 sides, and when viewed from the central axis direction of the roll body, the angle formed by the upper end of one of the cutout sides, the central axis of the roll body, and the upper end of the other cutout side may be 20° or more and 100° or less.

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 the roll body according to this embodiment includes a packaging box according to this embodiment and a roll body that is housed in the packaging box and has a core, and the core of the roll body is supported by the bearing portion of the packaging box.

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 portion may have a cutout bottom, and the roll may be positioned so as not to come into contact with the cutout bottom.

According to this embodiment, deformation of the core of the roll body can be suppressed.

FIG. 2 is an exploded perspective view showing a packaging box and a roll body according to an embodiment. FIG. 2 is a front view showing a packaging box and a roll body according to the embodiment. FIG. 11 is a front view showing a packaging box and a roll body according to a modified example. FIG. 4 is a front view showing a force applied to the core of the roll body. 1 is a graph showing the deformation amount of the core after a predetermined number of days have elapsed for each of Example 1, Example 2, and Comparative Example 1. 4 is a graph showing the distribution of pressure applied by a core to a 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. Each of the figures shown below is a schematic illustration. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. In addition, appropriate modifications can be made without departing from the technical concept. In each of the figures shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values such as dimensions of each member and the material names described in this specification are examples of an embodiment, and are not limited to these, and can be selected and used as appropriate. In this specification, terms that specify shapes or geometric conditions, such as parallel, orthogonal, and vertical, 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 configuration of the packaging box and the packaging box containing the roll according to this embodiment will be described with reference to Figures 1 to 3.

As shown in Figures 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.

Such a 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 the first side plate 11. The first side plate 11 and the second side plate 12 each have a bearing portion 21 that supports the core 51 of the roll body 50. Below each bearing portion 21, a notch portion 22 having a width W2 narrower than the width W1 of the bearing portion 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 surface. The bottom member 15 is made of cardboard and has a bottom surface 15a and a bottom outer periphery 15b located on the periphery of the bottom surface 15a. 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 outer periphery 15b protrudes upward from the periphery of the bottom surface 15a and is formed along the periphery 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 arranged inside the bottom outer periphery 15b.

The first side plate 11 is a plate-like member located on the negative Y-side of the packaging box 10, and stands upward from the bottom member 15. The first side plate 11 is made of cardboard and has a generally rectangular shape when viewed from the front. The first side plate 11 is also formed 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 the top to the bottom. As shown in FIG. 2, the bearing portion 21 has a pair of bearing side portions 21a, 21b and a bearing bottom portion 21c that is arc-shaped when viewed from the front. The pair of bearing side portions 21a, 21b extend upward from both side ends of the bearing bottom portion 21c.

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

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

The second side plate 12 is a plate-shaped member located on the positive side of the Y direction of the packaging box 10, and is erected upward from the bottom member 15. The second side plate 12 is also provided at a position facing the first side plate 11 in the direction of the central axis CL of the roll body 50 (Y direction). The roll 52 of the roll body 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 as a whole when viewed from the front. The second side plate 12 is also formed with a bearing portion 21 that supports the core 51 of the roll body 50. Furthermore, a cutout portion 22 is formed below the bearing portion 21. In addition, the shape, dimensions, and other configurations of the second side plate 12 are substantially the same as 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 inwardly of the packaging box 10. The third side plate 13 is made of cardboard and has a rectangular shape when viewed from the side.

The fourth side plate 14 is a plate-shaped member located on the negative side of the packaging box 10 in the X direction, and stands upward from the bottom member 15. The fourth side plate 14 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 fourth side plate 14 is made of cardboard and has a rectangular shape in a side view. The fourth side plate 14 is also located at a position opposite the third side plate 13 in the X direction. The roll 52 of the roll body 50 is arranged 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. Also, as long as the first side plate 11 and the second side plate 12 can be held in place so that they do not fall inward, the third side plate 13 and the fourth side plate 14 do not necessarily have to be provided.

A lid member 16 is disposed on the top surface of the packaging box 10 to cover the roll body 50 housed between the first side plate 11 and the second side plate 12. The lid member 16 is the member located at the topmost part 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 fitted around the first side plate 11 and the second side plate 12. As a result, the roll body 50 is covered by 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 (see FIG. 2) of the core 51 may be, for example, 100 mm or more and 400 mm or less, preferably 125 mm or more and 300 mm or less, and more preferably 150 mm or more and 250 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, preferably 15 mm or more and 30 mm or less, and more preferably 17 mm or more and 22 mm or less. According to this embodiment, as described later, it is possible to suppress deformation of the core 51 even when the load of the roll 52 is applied, so that the thickness t2 of the core 51 can be kept thin.

The roll 52 is, for example, a long film or paper wrapped around the core 51. The film constituting the roll 52 may be, for example, a polyolefin film, a polyester film, a nylon film, an elastomer film, a rubber film, an engineering plastic film, a polyvinyl chloride film, a cellulose film, an engineering plastic film, a film for displays, a film for solar cells, a vapor deposition film, 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 1900 mm or more and 2200 mm or less. The length L2 of the roll 52 may be, for example, 900 mm or more and 3100 mm or less, preferably 1500 mm or more and 2500 mm or less, and more preferably 1800 mm or more and 2100 mm or less. The length L1 of the core 51 and the length L2 of the roll 52 are each measured along the direction of 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 body 50 housed in the packaging box 10 constitute the packaging box 30 containing the roll body. In this case, the core 51 of the roll body 50 is supported by the bearing portion 21 of the packaging box 10. Meanwhile, there is no direct contact between the core 51 of the roll body 50 and the notch bottom portion 22c of the notch portion 22. In this embodiment, such a packaging box 30 containing a roll body is also provided. Note that multiple packaging boxes 30 containing roll bodies 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, and is a view from the direction of the central axis CL of the roll body 50 (front direction). As shown in FIG. 2, the bearing portion 21 has a width W1 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 intersection points where the horizontal plane passing through the central axis CL of the core 51 housed in the bearing portion 21 intersects with the pair of bearing side portions 21a, 21b. The width W2 of the notch 22 refers to the length measured in the X direction of the distance between the upper ends 22d, 22e of the pair of notch side portions 22a, 22b. Since the width W2 of the notch 22 is narrower than the width W1 of the bearing portion 21, the core 51 does not directly contact the notch bottom portion 22c of the notch portion 22. This allows the load of the roll body 50 to be distributed to the left and right, dispersing the stress that deforms the core 51, and making it possible to suppress deformation of the roll body 50, as described below.

2, when viewed from the direction of the central axis CL (front view), the angle θ is the angle formed by the upper end 22d of one of the notch side portions 22a, 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 portion 21 is determined in advance according to the outer diameter D1 of the core 51. By setting the width W2 of the notch portion 22 relative to the width W1 of the bearing portion 21 so that the angle θ is within the above range, the stress that deforms the core 51 can be dispersed, as described later, and the deformation of the roll body 50 can be suppressed.

The width W1 of the bearing portion 21 may be, for example, 90 mm or more and 400 mm or less, preferably 125 mm or more and 300 mm or less, and more preferably 150 mm or more and 250 mm or less. The width W2 of the notch 22 may be, for example, 20 mm or more and 200 mm or less, preferably 50 mm or more and 160 mm or less, and more preferably 80 mm or more and 120 mm or less. The height H1 of the notch 22 is a distance such that the core 51 does not come into contact with the notch bottom 22c, and may be, for example, 1 mm or more and 75 mm or less.

As shown in FIG. 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 the bottom to the top. This makes it easier to insert the core 51 into the bearing portion 21 from the top to the bottom.

Next, we will explain the operation of this embodiment with such a configuration.

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 this roll body 50 is housed in a packaging box 10. During this process, a pair of chucking devices (not shown) are attached to both ends of the core 51, and the roll body 50 is hoisted by a means such as a crane. Next, both ends of the core 51 of the roll body 50 are inserted from above into the bearing portion 21 of the first side plate 11 and the bearing portion 21 of the second side plate 12, respectively. After that, the chucking devices are 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 contained in the packaging box 10. The packaging box 30 containing the roll body is then stored for a predetermined period of time or transported to another location.

In this way, after the roll body 50 is accommodated in the packaging box 10 and a certain time has passed, it is considered that the core 51 of the roll body 50 may be deformed by the bearing part 21. In particular, when a heavy roll body 50 is stored or transported, the shape of the bearing part 21 may affect the core 51 of the roll body 50, which may cause the core 51 to deform. In general, the width W1 of the bearing part 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. For this reason, 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 is deformed so as to bulge 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, problems such as the core 51 not being able to enter the chucking device may occur.

In contrast, according to the present 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. 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 FIG. 4(a), a notch 22 is formed below the bearing portion 21, and the core 51 does not contact 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 trying to deform the core 51 from above and below can be reduced, and the 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. 4(b), 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 downward in the vertical direction, which tries to crush the core 51, is canceled by the force N acting vertically upward from the lower portion of the bearing portion 21. As a result, the forces trying to deform the core 51 from above and below act strongly, resulting in a large deformation of the core 51.

In this way, 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.

In addition, according to this embodiment, the angle θ between the upper end 22d of one of the notch side portions 22a, the central axis CL of the roll body 50, and the upper end 22e of the other notch side portion 22b is 20° or more and 100° or less. This makes it possible to disperse the stress that deforms the core 51, and more effectively suppress deformation of the roll body 50.

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

Example 1
A packaging box having the configuration shown in FIG. 1 and FIG. 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 100 mm. A roll body was housed in this packaging box. The roll body used had a weight of 430 kg and a roll length L2 of 2030 mm. The length L1 of the core was 2110 mm, the outer diameter D1 of the core was 203 mm, and the thickness t2 of the core was 21.5 mm. The angle θ between the upper end of one notch side portion, the central axis of the roll body, and the upper end of the other notch side portion was 60°. After that, the deformation amount of the core was measured after a predetermined number of days had passed. The deformation amount of the core was calculated by the difference between the inner diameter of the core in the horizontal direction (X direction) and the inner diameter of the core in the vertical direction (Z direction) (inner diameter in the horizontal direction - inner diameter in the vertical direction).

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 specified number of days had passed since the roll body was placed inside the box.

(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 therein.

Figure 5 and Table 1 show the deformation of the core after a certain number of days have passed, i.e., the difference between the horizontal inner diameter of the core and the vertical inner diameter of the core.

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. In this way, 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-mentioned Example 1, Example 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 (I-SCAN210(H) manufactured by Nitta) was used, and the sensor sheet was attached to the bearing portion to measure the pressure. The pressure was measured at 44 points in the angle range of -70° to 70° (total 140°) from the center, when the position vertically downward with respect to the central axis CL of the roll body was set to 0° (center). That is, as shown in FIG. 7, the pressure was measured at 44 points in the range where the angle α formed by the line segment L0 and the line segment La was -70° to 70° (-70°≦α≦70°). The line segment L0 is a line segment extending vertically downward from the central axis CL (α=0°). The line segment La is a line segment connecting the central axis CL and the measurement point Pa. The pressure was also the average value of five points in the thickness direction of the bearing portion. FIG. 6 shows the pressure distribution for each of Example 1, Example 2, and Comparative Example 1 in an angle range of -70° to 70° (total 140°) from the center.

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°. Thus, it can be seen that the pressure applied to the core is dispersed by providing cutouts in the first and second side plates.

The multiple components disclosed in the above embodiments and modifications may be combined as necessary. Alternatively, some components may be deleted from all the components shown in the above 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)

Cardboard packaging box,
A roll body that is contained in the packaging box and has a core,
The packaging box is
A bottom member;
a first side plate provided on the bottom member;
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 when viewed from the front,
A notch having a width narrower than the width of each bearing portion is formed below each bearing portion,
The core of the roll body is supported by the bearing portion of the packaging box,
The cutout portion has a pair of cutout side portions and a cutout bottom portion,
when viewed from the central axial direction of the roll body, peaks of the pressure applied by the core to the bearing portion are present at the positions of the bearing bottoms located on both sides of the cutout portion,
The roll body is arranged so as not to come into contact with the bottom of the cutout. The width of the bearing portion is 90 mm or more and 400 mm or less,
The width of the cutout is 20 mm or more and 200 mm or less,
The packaging box containing the roll according to claim 1 , wherein the height of the cutout portion is from 1 mm to 75 mm. The packaging box containing the roll body according to claim 1 or 2, wherein the weight of the roll body is 100 kg or more and 800 kg or less. The packaging box containing a roll body according to any one of claims 1 to 3, wherein, when viewed from the central axial direction of the roll body, the peaks of the pressure applied by the core to the bearing portion are located at positions of +40° to +60° and -40° to -60°, respectively, when a position vertically below the central axis of the roll body is defined as 0°.

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