JP7484592B2 - Partition blank sheet and method for manufacturing the partition blank sheet - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act On May 18, 2020, Nagano Morishigyo Co., Ltd. sold blank sheets related to the invention to TS Network Co., Ltd.

The present invention relates to blank sheets for partitions and a method for manufacturing blank sheets for partitions.

One type of partition that can be placed on a tabletop is made up of three plastic wall panels that are connected horizontally, with the left and right wall panels bent forward relative to the center panel (see, for example, Patent Document 1).

Japanese Patent No. 6209750

The problem with the conventional partitions mentioned above is that the wall height cannot be adjusted depending on the conditions of use.

The present invention aims to solve the above problems and provide a blank sheet for partitions made of cardboard that allows the wall height to be changed according to the conditions of use, and a method for manufacturing the blank sheet for partitions.

In order to solve the above problems, the first invention is a blank sheet for a partition made of cardboard for forming a partition. The blank sheet includes three first wall panels connected in a horizontal direction, a second wall panel connected to one edge in a vertical direction of the first wall panels, and a flap connected to the other edge in the vertical direction of the first wall panels. The adjacent first wall panels are connected to each other via a vertical line extending in a vertical direction. The first wall panel and the second wall panel are connected to each other via two parallel first horizontal lines extending in a horizontal direction. The first wall panel and the flap are connected to each other via a second horizontal line extending in a horizontal direction. The second wall panel can be folded back with respect to the first wall panel to form a double wall in which the second wall panel is overlapped on the first wall panel.

When forming a partition from the partition blank sheet of the present invention, the left and right first wall panels are folded forward relative to the central first wall panel. The flaps are also folded toward the inner surface of the first wall panel, and positioned perpendicular to the first wall panel. The second wall panel is then folded back toward the inner surface of the first wall panel, forming the partition.

The partition blank sheet of the present invention can form a partition having double walls on the front and left and right sides, thereby improving the soundproofing effect of the partition.
Furthermore, with the blank sheet of the present invention, the first wall panel and the second wall panel are vertically continuous without folding back the second wall panel in relation to the first wall panel, thereby making it possible to increase the height of the partition wall.

When forming a partition from the partition blank sheet of the present invention, the second wall panel is folded relative to the first wall panel at the two parallel first horizontal lines, so that the folded portion can be formed stably and the shape of the corners can be stabilized.

The blank sheet for partitions of the present invention can be easily stored and transported by folding the left and right first wall panels over the central first wall panel.
Since the partition blank sheet of the present invention is made of cardboard, it can be easily discarded and recycled.

When a partition formed from the partition blank sheet of the present invention is installed with the flap side facing down, the underside of the flap comes into surface contact with the installation surface, thereby increasing the stability of the partition and making it less likely to scratch the installation surface.
When a partition formed from the partition blank sheet of the present invention is installed with the flap side facing up, the flap protrudes inward from the upper edge of the wall, effectively blocking views from outside.

The survival period of viruses adhering to the surface of a cardboard plate is significantly shorter than that of viruses adhering to the surface of a plastic plate. Therefore, with partitions formed from the cardboard partition blank sheet of the present invention, the survival period of viruses adhering to the surface is shorter than that of plastic partitions, making them effective in preventing the spread of viruses.

In order to solve the above problem, the second invention is a method for manufacturing a blank sheet for a partition, which includes three first wall panels connected in the horizontal direction, a second wall panel connected to one edge in the vertical direction of the first wall panels, and a flap connected to the other edge in the vertical direction of the first wall panels, and is capable of forming a double wall by folding the second wall panel back against the first wall panel . First, a base sheet made of corrugated cardboard is prepared, on which two parallel first horizontal lines extending in the horizontal direction and a second horizontal line extending in the horizontal direction are formed with a gap in the vertical direction. Next, a creaser rotating around a horizontal axis forms two vertical lines that become both side edges of the central first wall panel on the base sheet moving in the vertical direction. Furthermore, a cutting blade attached to the outer periphery of a slotter rotating around a horizontal axis forms slits on the extensions of the vertical lines that become the boundaries between the adjacent second wall panels and the boundaries between the adjacent flaps.

In the method for manufacturing blank sheets for partitions of the present invention, a base sheet on which first and second horizontal lines have been formed is moved vertically through a creaser and a slotter, thereby forming a first wall panel, a second wall panel, and a flap on the base sheet. In this way, in the method for manufacturing blank sheets for partitions of the present invention, there is no need to stop the base sheet when processing it, so blank sheets for partitions can be manufactured continuously at high speed.

In the method for manufacturing blank sheets for partitions described above, the creaser and the slotter are provided on a conveying path along which the base sheet is moved vertically, and the vertical lines are formed on the base sheet by two of the four creasers aligned horizontally. Furthermore, the slits are formed on the base sheet by two of the four slotters aligned horizontally.

With this configuration, blank sheets for partitions can be manufactured without removing the creaser and slotter from a general flexo folder gluer (FFG) capable of manufacturing Type A packaging boxes, thereby reducing the manufacturing costs of blank sheets for partitions.

In the method for manufacturing blank sheets for partitions described above, the first scorer and the second scorer of the corrugator are arranged side by side in the horizontal direction, and the creasing roller of the first scorer and the creasing roller of the second scorer are arranged offset in the vertical direction. Then, the base sheet is moved in the horizontal direction to pass the base sheet through the first scorer and the second scorer, and the two first horizontal creasing lines are formed in the base sheet by the two creasing rollers.

In this configuration, by arranging the two scorers side by side in the sheet movement direction, it is possible to prevent the creasing rollers of both scorers from interfering with each other in the lateral direction that intersects with the sheet movement direction. This makes it possible to narrow the lateral distance between the two creasing rollers, and therefore the distance between the two first lateral creasing lines.

The blank sheet for partitions of the present invention can form partitions that have a high soundproofing effect and whose wall height can be changed according to the conditions of use. In addition, since the blank sheet for partitions of the present invention is made of cardboard, it can be easily discarded and recycled, and the survival period of viruses attached to the surface is shortened, which is effective in preventing the spread of viruses.
In the method for manufacturing blank sheets for partitions of the present invention, there is no need to stop the base sheet when processing the base sheet, so blank sheets for partitions can be manufactured continuously at high speed.

FIG. 2 is a diagram showing a blank sheet according to the embodiment of the present invention. FIG. 2 is a perspective view showing a blank sheet according to the embodiment of the present invention in a folded state. FIG. 11 is a perspective view of a state in which the left and right first wall panels are raised relative to the central first wall panel during the stage of assembling the partition according to the embodiment of the present invention. FIG. 13 is a perspective view showing the steps of assembling a partition according to an embodiment of the present invention, and is a perspective view showing the step of folding back the left and right second wall panels relative to the left and right first wall panels. 1 is a perspective view of a partition according to an embodiment of the present invention, installed with the flap facing down. FIG. 1 is a perspective view of a partition according to an embodiment of the present invention installed with the flap facing up. FIG. FIG. 2 is a perspective view of a partition according to an embodiment of the present invention, in which a first wall panel and a second wall panel are installed vertically in succession. 5A to 5C are explanatory diagrams showing a step of forming a first horizontal line and a second horizontal line in a manufacturing method of a blank sheet according to an embodiment of the present invention. 5A to 5C are diagrams illustrating a stage in which a base sheet passes through a creaser and a slotter in a blank sheet manufacturing method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the following description, the up, down, left and right directions are defined for the convenience of explaining the blank sheets and partitions of this embodiment, and do not limit the configuration or usage of the blank sheets and partitions.

A blank sheet S for partitions in this embodiment (hereinafter simply referred to as a "blank sheet S") is formed by cutting out a sheet of cardboard, as shown in Fig. 1. The blank sheet S shown in Fig. 1 is arranged so that the inner surface side is visible.
The blank sheet S is folded in a mountain fold or a valley fold at each line to form a partition 1 (see FIGS. 5 to 7) having walls on the front, left and right sides. In this embodiment, the blank sheet S for forming the partition 1 to be placed on a desk in a workplace or the like will be described as an example.

The creases on the blank sheet S are formed by pressing the surface of the blank sheet S into a line. Note that intermittent cuts may also be formed in the creases. This makes it easier to fold the blank sheet S at the creases.

The blank sheet S has three first wall panels 10, 11 connected together in the horizontal direction (left-right direction). The blank sheet S also has second wall panels 20, 21 connected to one vertical edge of the first wall panels 10, 11 (the upper edge in FIG. 1), and flaps 30, 31 connected to the other vertical edge of the first wall panels 10, 11 (the lower edge in FIG. 1).

The three first wall panels 10, 11 are formed in a rectangular shape. In this embodiment, the horizontal width of the central first wall panel 10 of the three first wall panels 10, 11 is greater than the horizontal widths of the left and right first wall panels 11, 11. The left and right first wall panels 11, 11 have the same shape.

The first central wall panel 10 and the first left wall panel 11 are connected via a vertical line L1 that extends vertically perpendicular to the horizontal direction. The first central wall panel 10 and the first right wall panel 11 are connected via a vertical line L1 that extends vertically. In this way, the two vertical lines L1, L1 form the left and right side edges of the first central wall panel 10.

A vertically extending line L5 is formed in the horizontal middle of the first central wall panel 10. This line L5 is formed in the manufacturing method of the blank sheet S of this embodiment, but is not used when forming the partition 1 from the blank sheet S.

The central second wall panel 20 is connected to one vertical edge of the central first wall panel 10 via two parallel first horizontal lines L2, L2 that extend horizontally. The central second wall panel 20 has the same shape as the central first wall panel 10.

The left-side second wall panel 21 is connected to one vertical edge of the left-side first wall panel 11 via two parallel first horizontal lines L2, L2 that extend horizontally. The left-side second wall panel 21 has the same shape as the left-side first wall panel 11.

The right-side second wall panel 21 is connected to one vertical edge of the right-side first wall panel 11 via two parallel first horizontal lines L2, L2 that extend horizontally. The right-side second wall panel 21 has the same shape as the right-side first wall panel 11.

The two first horizontal lines L2, L2 are parallel to each other and spaced apart in the vertical direction. In this embodiment, the first horizontal lines L2, L2 are corrugator lines, which are linear grooves formed by a corrugator 100 (see FIG. 8) that manufactures the base sheet S1 (see FIG. 8) of the blank sheet S.

The second wall panel 20 in the center and the second wall panel 21 on the left side are separated by a first slit L11 extending vertically. The second wall panel 20 in the center and the second wall panel 21 on the right side are separated by a first slit L11 extending vertically.

A central flap 30 is connected to the other longitudinal edge of the first central wall panel 10 via a second horizontal line L3 extending laterally.
A left flap 31 is connected to the other longitudinal edge of the left first wall panel 11 via a second horizontal line L3 extending laterally.
A right flap 31 is connected to the other longitudinal edge of the right-side first wall panel 11 via a second horizontal line L3 extending horizontally.
Each of the flaps 30 and 31 is a strip-shaped portion extending in the horizontal direction.

The second horizontal lines L3 in this embodiment are corrugator lines, which are linear grooves formed by a corrugator 100 (see FIG. 8) that manufactures the base sheet S1 of the blank sheet S (see FIG. 8).
The central flap 30 and the left flap 31 are separated by a second slit L12 extending in the vertical direction. The central flap 30 and the right flap 31 are also separated by a second slit L12 extending in the vertical direction.

When the blank sheet S of this embodiment is transported and stored, as shown in FIG. 2, the left and right first wall panels 11, 11 are folded back relative to the central first wall panel 10, and the left and right first wall panels 11, 11 are overlapped on the inner surface of the central first wall panel 10. At this time, the left and right second wall panels 21, 21 overlap the inner surface of the central second wall panel 20, and the left and right flaps 31, 31 overlap the inner surface of the central flap 30. In this way, the blank sheet S can be transported and stored in a folded state.

Next, when forming the partition 1 from the blank sheet S, first, the blank sheet S is placed on a work surface with the inner surface of the central first wall panel 10 facing up, as shown in Fig. 3. Then, the left and right first wall panels 11, 11 are folded upward relative to the central first wall panel 10 at the vertical lines L1, L1, so that the left and right first wall panels 11, 11 are raised vertically relative to the central first wall panel 10.
At this time, the left and right second wall panels 21, 21 as well as the left and right first wall panels 11, 11 rise perpendicularly to the central second wall panel 20. Similarly, the left and right flaps 31, 31 as well as the left and right first wall panels 11, 11 rise perpendicularly to the central flap 30.

Next, the left flap 31 is folded toward the inner surface of the left second wall panel 21 at the second horizontal line L3 relative to the left second wall panel 21, and the left flap 31 is arranged perpendicular to the left second wall panel 21. Similarly, the right flap 31 is folded toward the right second wall panel 21, and the right flap 31 is arranged perpendicular to the right second wall panel 21.

Furthermore, the central flap 30 is folded toward the inner surface of the central second wall panel 20 along the second horizontal line L3, and the central flap 30 is arranged perpendicular to the central second wall panel 20. Then, the left and right ends of the central flap 30 are overlapped on the outer surfaces of the left and right flaps 31, 31 and joined together with adhesive tape or glue.

Then, as shown in FIG. 4, the blank sheet S is placed on the work surface with the flaps 30, 31 facing down. Then, the second left wall panel 21 is folded back on the inner surface of the first left wall panel 11 at the two first horizontal lines L2, L2 relative to the first left wall panel 11. Similarly, the second right wall panel 21 is folded back on the inner surface of the first right wall panel 11 at the two first horizontal lines L2, L2 relative to the first right wall panel 11. In this way, the second wall panel 21 is overlapped on the inner surface of the first wall panel 11 to form a double wall.

5, the central second wall panel 21 is folded back at the two first horizontal lines L2, L2 relative to the central first wall panel 10 toward the inner surface of the central first wall panel 10. In this manner, the second wall panel 20 is overlapped on the inner surface of the first wall panel 10 to form a double wall.
When the central second wall plate 20 is folded back relative to the central first wall plate 10, the central second wall plate 20 is pushed between the left and right second wall plates 21, 21. As a result, the left and right edges of the central second wall plate 20 are pressed against the left and right second wall plates 21, 21, making it difficult for each of the second wall plates 20, 21 to return upward.

In this way, a partition 1 can be formed from a blank sheet S (see Figure 1) in which the central first wall panel 10 and second wall panel 20 are placed at the front, and the left and right first wall panels 11, 11 and second wall panels 21, 21 are folded forward relative to the central first wall panel 10 and second wall panel 20.

In addition, the partition 1 of this embodiment can also be placed on a table with the flaps 30, 31 facing up, as shown in Figure 6.
In addition, as shown in FIG. 7 , the partition 1 of this embodiment can also have a high wall height by making the first wall panels 10, 11 and the second wall panels 20, 21 continuous vertically without folding the second wall panels 20, 21 back onto the first wall panels 10, 11.

In the blank sheet S as described above, as shown in FIG. 5, the second wall panels 20, 21 are folded back on the inner side of the first wall panels 10, 11 to form a double wall, thereby improving the soundproofing effect of the partition 1.

In the blank sheet S of this embodiment, as shown in FIG. 7, the first wall panels 10, 11 and the second wall panels 20, 21 are connected vertically without folding the second wall panels 20, 21 back on the first wall panels 10, 11, thereby making it possible to increase the height of the wall of the partition 1.

The survival period of viruses attached to the surface of a cardboard plate is much shorter than the survival period of viruses attached to the surface of a plastic plate. Therefore, in the partition 1 shown in FIG. 5 formed from the cardboard blank sheet S (see FIG. 1) of this embodiment, the survival period of viruses attached to the surface is shorter than that of a plastic partition. Therefore, the partition 1 formed from the blank sheet S (see FIG. 1) of this embodiment is effective in preventing the spread of viruses.

In the blank sheet S of this embodiment (see FIG. 1), the second wall panels 20, 21 are folded relative to the first wall panels 10, 11 at the two parallel first horizontal lines L2, L2, so that the folded portions can be formed stably. This allows the shape of the corners of the upper edge of the partition 1 to be stabilized.

In addition, when the partition 1 is installed with the flaps 30, 31 facing downwards, the undersides of the flaps 30, 31 come into surface contact with the installation surface, which increases the stability of the partition 1 and makes it less likely to scratch the installation surface.

Also, as shown in Figure 6, when partition 1 is installed with the flap side facing up, flaps 30 and 31 protrude inward from the upper edge of the wall, effectively blocking views from outside.

As shown in FIG. 2, the blank sheet S of this embodiment can be easily stored and transported by folding it so that the left and right first wall panels 11, 11 overlap the central first wall panel 10.
The blank sheet S of this embodiment is made of cardboard, and therefore can be easily discarded and recycled.

Next, a method for manufacturing the blank sheet S of this embodiment will be described.
In the manufacturing method of the blank sheet S of this embodiment, first, a first horizontal line L2 and a second horizontal line L3 are formed in a base sheet S1 by a corrugator 100 shown in Fig. 8. Next, a vertical line L1, a first slit L11 and a second slit L12 are formed in the base sheet S1 by a box former 200 shown in Fig. 9, thereby forming the blank sheet S.

The corrugator 100 shown in FIG. 8 is provided with a first scorer 110 and a second scorer 120. These two scorers 110, 120 are used to form two first horizontal lines L2, L2 and one second horizontal line L3 on the base sheet S1.

The first scorer 110 is provided with a pair of upper and lower first scoring rollers 111, 111 and a pair of upper and lower second scoring rollers 112, 112.
The upper and lower first scoring rollers 111, 111 have outer circumferential surfaces formed with unevenness extending in the circumferential direction over the entire circumference.
When the base sheet S1 passes between the upper and lower first ruling rollers 111, 111 in the horizontal direction C1, the unevenness of the outer peripheral surfaces of both first ruling rollers 111, 111 is pressed against the outer and inner surfaces of the base sheet S1, forming a first horizontal ruling L2 on the base sheet S1.
The first horizontal ruled line L2 is composed of two grooves formed on the outer surface of the base sheet S1 and one groove formed on the inner surface of the base sheet S1. A groove on the inner surface is formed between the two grooves on the outer surface.

The upper and lower second creasing rollers 112, 112 are arranged at a distance from the upper and lower first creasing rollers 111, 111 in a vertical direction C2 perpendicular to the horizontal direction C1.
The upper and lower second creasing rollers 112, 112 have the same configuration as the upper and lower first creasing rollers 111, 111. When the base sheet S1 passes between the upper and lower second creasing rollers 112, 112 in the lateral direction C1, a second lateral ruled line L3 is formed on the base sheet S1.

The second scorer 120 is arranged next to the first scorer 110 on the downstream side in the horizontal direction C1. The second scorer 120 is provided with a pair of upper and lower third creasing rollers 113, 113.
The upper and lower third creasing rollers 113, 113 have the same configuration as the upper and lower first creasing rollers 111, 111. When the base sheet S1 passes between the upper and lower third creasing rollers 113, 113 in the lateral direction C1, a first lateral creasing line L2 is formed on the base sheet S1.

The first horizontal lines L2 formed by the first line rollers 111, 111 and the first horizontal lines L2 formed by the third line rollers 113, 113 extend parallel to the horizontal direction C1. The gap between the first horizontal lines L2, L2 in the vertical direction C2 is narrow.

In the corrugator 100 of this embodiment, the two scorers 110, 120 are arranged side by side in the horizontal direction C1, so that the two first scoring rollers 111, 111 of the first scorer 110 and the two third scoring rollers 113, 113 of the second scorer 120 are configured not to interfere with each other in the vertical direction C2 perpendicular to the horizontal direction C1.
As a result, in the corrugator 100, the first scoring rollers 111, 111 and the third scoring rollers 113, 113 can be brought close to each other in the vertical direction C2, thereby narrowing the distance between the two first horizontal scores L2, L2.

As shown in FIG. 9, the box former 200 of this embodiment is a general flexo folder gluer (FFG) capable of producing A-type packaging boxes.
The creaser/slotter unit 210 of the box former 200 is a device that forms vertical lines L1, first slits L11 and second slits L12 in the base sheet S1 while moving the base sheet S1 in the vertical direction C2.
The creaser/slotter section 210 includes four creasers 220 that rotate about a horizontal axis, and four slotters 230 that rotate about a horizontal axis.

The creaser 220 is a disk-shaped member that rotates around an axis in the horizontal direction C1 (a direction perpendicular to the conveying direction). Four creasers 220 are attached to one rotating shaft 221 with horizontal intervals between them. A convex portion extending in the circumferential direction is formed on the outer circumferential surface of the creaser 220.
When the base sheet S1 passes through each creaser 220, the outer peripheral surface of each creaser 220 is pressed against the inner surface of the base sheet S1 and rolls, forming lines on the inner surface of the base sheet S1. Two vertical lines L1, L1 are formed on the base sheet S1 by the second and fourth creasers 220 from the right in Fig. 9. Also, a line L5 is formed on the base sheet S1 by the third creaser 220 from the right in Fig. 9.

The slotter 230 is a disk-shaped member that rotates around a horizontal axis. Four slotters 230 are attached to a single rotating shaft 231 with horizontal intervals between them. Each slotter 230 is arranged in parallel with each creaser 220 downstream in the conveying direction of the base sheet S1. A cutting blade is attached to the outer peripheral surface of the second and fourth slotters 230 from the right in Figure 9.

When the base sheet S1 passes through each slotter 230, the cutting blades of the second and fourth slotters 230 from the right in Figure 9 form a first slit L11 and a second slit L12 on the extension of the vertical line L1.

Next, a method for manufacturing the partition 1 in this embodiment will be described.
First, as shown in FIG. 8, a base sheet S1 made of cardboard is passed through a slitter scorer of a corrugator 100 in a horizontal direction C1, and two first horizontal lines L2, L2 and one second horizontal line L3 are formed in the base sheet S1 by a first scorer 110 and a second scorer 120.

Next, as shown in Figure 9, the base sheet S1 on which the first horizontal line L2 and the second horizontal line L3 have been formed is supplied to the conveying path of the box making machine 200, and the base sheet S1 is moved in the vertical direction C2 to pass through the creaser slotter section 210.
In the creaser/slotter section 210, two vertical lines L1, L1 and another line L5 are formed on the inner surface of the base sheet S1 by the three creasers 220. After that, a first slit L11 and a second slit L12 are formed on the extension of the vertical line L1 by the two slotters 230.

In this way, the partition blank sheet S shown in FIG. 1 can be formed using a corrugator 100 (see FIG. 8) and a box-making machine 200 (see FIG. 9) capable of producing A-type packaging boxes.

In the manufacturing method of the partition blank sheet S of this embodiment as described above, as shown in FIG. 8, the two scorers 110, 120 of the corrugator 100 are arranged side by side in the moving direction of the base sheet S1. With this configuration, it is possible to prevent the creasing rollers 111, 113 of both scorers 110, 120 from interfering with each other in the lateral direction intersecting with the moving direction of the base sheet S1. This makes it possible to narrow the lateral distance between both creasing rollers 111, 113, and therefore the distance between the two first lateral creasing lines L2, L2.

Also, as shown in FIG. 9, the base sheet S1 on which the first horizontal line L2 and the second horizontal line L3 are formed can be moved in the vertical direction C2 and passed through the creaser 220 and the slotter 230 of the box making machine 200 to form a blank sheet S. In this way, since there is no need to stop the base sheet S1 when processing the base sheet S1, blank sheets S can be manufactured continuously at high speed.

In addition, since the partition blank sheet S can be manufactured without removing the creaser 220 and the slotter 230 from a general flexo folder gluer (FFG) capable of manufacturing A-type packaging boxes, the manufacturing cost of the partition blank sheet S can be reduced.

In addition, with the blank sheet manufacturing method of the present invention, it is easier to adjust the depth of the creases compared to forming creases on the base sheet S1 using a flat die cutter, so creases of a depth suitable for folding can be formed according to the thickness of the base sheet S1.

In addition, when manufacturing blank sheets for partitions with different wall heights (i.e., the vertical lengths of the first and second wall panels), if a flat die cutter is used, it is necessary to prepare a punching die for each wall height. However, with the blank sheet manufacturing method of the present invention, it is possible to reduce manufacturing costs by simply preparing base sheets of different sizes and adjusting the position of the corrugator's creasing roller.

The above describes the blank sheet S and the manufacturing method of blank sheet S according to an embodiment of the present invention, but the present invention is not limited to the blank sheet S and the manufacturing method of blank sheet S according to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention.
In the partition 1 of this embodiment, as shown in Fig. 1, the lateral width of the central first wall panel 10 is formed to be larger than the lateral width of the left and right first wall panels 11, 11. In addition, the left and right first wall panels 11, 11 are formed to be the same shape. However, the shapes of the first wall panels 10, 11, the second wall panels 20, 21, and the flaps 30, 31 are not limited, and the shapes are appropriately set according to the conditions of use.

In this embodiment, the blank sheet S is formed using a corrugator 100 (see FIG. 8) and a box-making machine 200 (see FIG. 9) capable of producing A-type packaging boxes, but the blank sheet S may also be formed using a flat die cutter.

REFERENCE SIGNS LIST 1 Partition 10 First central wall panel 11 Left and right first wall panels 20 Second central wall panel 21 Left and right second wall panels 30 Central flap 31 Left and right flaps 100 Corrugator 110 First scorer 111 First creasing roller 112 Second creasing roller 113 Third creasing roller 120 Second scorer 200 Box former 210 Creaser slotter section 220 Creaser 230 Slotter L1 Vertical creasing line L11 Crease L2 First horizontal creasing line L3 Second horizontal creasing line L11 First slit L12 Second slit S Blank sheet S1 Base sheet

Claims (4)

A blank sheet for a partition made of cardboard for forming a partition,
Three first wall panels connected horizontally,
A second wall panel connected to one edge portion of the first wall panel in a longitudinal direction;
a flap connected to the other edge of the first wall panel in the longitudinal direction;
The adjacent first wall panels are connected via a vertical line extending in the vertical direction,
The first wall panel and the second wall panel are connected via two first horizontal lines extending in parallel in the horizontal direction,
The first wall panel and the flap are connected via a second horizontal line extending in the horizontal direction ,
A blank sheet for partitions, characterized in that the second wall panel can be folded back onto the first wall panel to form a double wall in which the second wall panel is overlapped on the first wall panel . Three first wall panels connected horizontally,
A second wall panel connected to one edge portion of the first wall panel in a longitudinal direction;
a flap connected to the other edge of the first wall panel in the longitudinal direction ;
A method for manufacturing a partition blank sheet capable of forming a double wall by folding back the second wall panel against the first wall panel, the method comprising:
A step of preparing a base sheet made of corrugated cardboard on which two parallel first horizontal lines extending in the horizontal direction and a second horizontal line extending in the horizontal direction are formed at a distance in the vertical direction;
forming two vertical creases that become both side edges of the first central wall panel with a creaser that rotates about a horizontal axis on the base sheet that moves in the vertical direction;
forming slits on the extensions of the vertical lines, the slits being the boundaries between the adjacent second wall panels and the boundaries between the adjacent flaps, by a cutting blade attached to the outer periphery of a slotter that rotates about a horizontal axis;
A method for manufacturing a blank sheet for partitions, comprising: A method for manufacturing a blank sheet for partitions according to claim 2,
the creaser and the slotter are provided on a conveying path along which the base sheet is moved in a vertical direction,
The vertical lines are formed on the base sheet by two of the four creasers arranged in a horizontal direction,
A method for manufacturing a blank sheet for a partition, characterized in that the slits are formed in the base sheet by two of the four slotters arranged horizontally. A method for manufacturing a blank sheet for partitions according to claim 2 or 3,
A first scorer and a second scorer of the corrugator are arranged side by side in a horizontal direction,
The creasing roller of the first scorer and the creasing roller of the second scorer are arranged to be offset in the vertical direction,
A method for manufacturing a blank sheet for partitions, characterized in that the base sheet is moved laterally and passed through the first scorer and the second scorer, thereby forming two first horizontal lines in the base sheet by the two line rollers.

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