JP6729733B1 - Blank sheet manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blank sheet manufacturing method capable of enhancing the manufacturing efficiency of a blank sheet of a polygonal packaging box. A manufacturing method of a blank sheet S1 in which an inclined wall 16A is formed between adjacent side walls 11 and 13. First, a paper base sheet S on which two horizontal ruled lines L1 and L2 are formed is prepared. Next, the first vertical ruled line L12 is formed by the creaser on the base sheet S that moves in the vertical direction. Further, the cutting groove L31 is formed on the extension of the first vertical ruled line L12 by the cutting blade attached to the outer peripheral portion of the slotter. Next, with respect to the base material sheet S that moves in the vertical direction, the side portions of the adjacent flaps 21 and 22 are cut off by the cutting die 142 of the rotary die cutter 140. Further, the second vertical ruled line L21 is formed beside the first vertical ruled line L12 to form the inclined wall 16A. [Selection diagram] Fig. 5

Description

The present invention relates to a blank sheet manufacturing method.

Some packaging boxes include a hexagonal body in plan view and upper and lower lids that close upper and lower openings of the body (see, for example, Patent Document 1). In such a hexagonal packaging box, in addition to the outer surfaces of the four side walls, the product information can be printed on the outer surface of the inclined wall between the adjacent side walls, so that the customer can view the product information from multiple directions.

JP, 2017-061341, A

The blank sheet of the above-mentioned polygonal packaging box is formed by punching a corrugated board base sheet with a flat die cutter.
In the flat plate die cutter, the flat die is moved up and down to punch the base sheet, and it is necessary to stop the base sheet on the conveyance path. is there.

It is an object of the present invention to provide a method for manufacturing a blank sheet that solves the above-mentioned problems and can improve the manufacturing efficiency of the blank sheet for a polygonal packaging box.

In order to solve the above-mentioned problem, the present invention is a method for manufacturing a blank sheet, in which an inclined wall is formed between adjacent side walls and a flap of a lid portion is continuously provided on the side wall. First, a paper base sheet is prepared in which two horizontal ruled lines extending in the horizontal direction are formed at intervals in the vertical direction orthogonal to the horizontal direction. Next, with respect to the base sheet that moves in the vertical direction, a first vertical ruled line that is a side edge portion of the side wall is formed by a creaser that rotates around an axis in the horizontal direction. Moreover, a cutting groove is formed on an extension of the first vertical ruled line by a cutting blade attached to the outer peripheral portion of the slotter that rotates around the axis in the horizontal direction. Next, with respect to the base sheet that moves in the vertical direction, at least the flaps that are laterally adjacent to each other are cut by a cutting blade part attached to the outer peripheral surface of the rotary die cutter that rotates around an axis in the horizontal direction. Cut off one side. In addition, a second vertical ruled line is formed beside the first vertical ruled line by the convex portion of the punching die, and the inclined wall is formed between the first vertical ruled line and the second vertical ruled line.

In the blank sheet manufacturing method of the present invention, the side wall and the inclined wall can be formed in the base material sheet by moving the base material sheet in one direction to pass through the creaser, the slotter, and the rotary die cutter. That is, in the blank sheet manufacturing method of the present invention, it is not necessary to stop the base material sheet when processing the base material sheet, and thus blank sheets of a polygonal packaging box can be continuously manufactured at high speed.

Further, in the method for manufacturing a blank sheet of the present invention, the depth of the ruled line is easily adjusted as compared with the case where the ruled line is formed on the substrate sheet using the flat plate die cutter. Ruled lines with a depth suitable for bending can be formed.

It is preferable that the creaser, the slotter, and the rotary die cutter are provided in a conveyance path for moving the base sheet in the vertical direction to form one unit.
Further, by the four horizontally arranged cleaners, the first vertical ruled line is formed on the base sheet, and by the four slotters arranged in the horizontal direction, the cut grooves are formed in the base sheet. It is preferably formed.

In the method for producing a blank sheet of the present invention, when the box making machine having the above-described configuration is used, the cutting die of the rotary die cutter is changed so that the second vertical ruled line is not formed on the base sheet. It is possible to manufacture a blank sheet of a type A packaging box in which two side walls are continuously arranged. As described above, the method for producing a blank sheet of the present invention can be carried out by a box-making machine capable of producing a blank sheet for a general A-type packaging box, so that a hexagonal or octagonal polygonal packaging box can be produced. The cost can be reduced.

In the method for manufacturing a blank sheet described above, a part of the base sheet is cut out by the punching die so that the vertical end of the inclined wall is arranged outside the horizontal ruled line in the vertical direction. Is preferred.
When a packaging box is assembled from such a blank sheet, the vertical end of the inclined wall projects more than the vertical end of the side wall. This facilitates the support of the inner surface of the inclined wall by the flap when the flap is closed.
Further, by supporting the inner surface of the inclined wall by the flap, the body can be formed in a polygonal shape as intended at the time of design even when the body is empty, and the shape can be maintained.

In the method for manufacturing a blank sheet of the present invention, it is possible to form a blank sheet while moving the base sheet in one direction without stopping the base sheet, thus increasing the manufacturing efficiency of the blank sheet of the polygonal packaging box. You can

It is the perspective view which looked at the packaging box concerning a first embodiment of the present invention from the above. It is a figure showing a blank sheet concerning a first embodiment of the present invention. It is a schematic structure figure showing the box making machine used for the manufacturing method of the blank sheet concerning a first embodiment of the present invention. It is a figure showing a process of passing a creaser and a slotter in a manufacturing method of a blank sheet concerning a first embodiment of the present invention. It is the figure which showed the process of passing a rotary die cutter in the manufacturing method of the blank sheet which concerns on 1st embodiment of this invention. It is the perspective view which looked at the packaging box concerning a second embodiment of the present invention from the bottom. It is the figure which showed the process of passing a rotary die cutter in the manufacturing method of the blank sheet which concerns on 2nd embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of each embodiment, the same constituent elements will be denoted by the same reference numerals, and redundant description will be omitted.

[First embodiment]
The blank sheet manufacturing method of the first embodiment is a method of manufacturing a blank sheet S1 (see FIG. 2) of a packaging box 1A having a hexagonal body 10, as shown in FIG.

The packaging box 1A of the first embodiment includes a body portion 10 formed in a hexagonal polygonal tube shape, and a pair of upper and lower lid portions 20 and 20 that close the upper and lower openings of the body portion 10. ing.

As shown in FIG. 2, the packaging box 1A is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out one corrugated cardboard sheet at each ruled line. The blank sheet S1 shown in FIG. 2 is arranged so that the inner surface side can be seen.
Each ruled line (folded line) of the blank sheet S1 is a linear groove (pressed rule) formed by pressing the surface of the blank sheet S1.

As shown in FIG. 1, the body portion 10 includes a front and rear pair of front and rear side walls 11 and 12, and a pair of left and right left and right side walls 13 and 14. Further, the body portion 10 includes a first inclined wall 16A formed between the adjacent front side wall 11 and the left side wall 13 and a second inclined wall formed between the adjacent rear side wall 12 and the right side wall 14. 16B and. Hexagonal openings are formed on the upper surface and the lower surface of the body 10 in plan view.

The first inclined wall 16A is formed at the front left corner of the body 10. The first inclined wall 16A is connected to the left edge of the front side wall 11 via a second vertical ruled line L21 and is connected to the front edge of the left side wall 13 via a first vertical ruled line L12. .. The first inclined wall 16A is formed in an elongated rectangular shape and is inclined with respect to the front side wall 11 and the left side wall 13.

The second inclined wall 16B is formed at the right rear corner of the body 10. The second inclined wall 16B is connected to the right edge portion of the rear side wall 12 via the second vertical ruled line L22, and is also connected to the rear edge portion of the right side wall 14. The second inclined wall 16B is formed in an elongated rectangular shape (see FIG. 2) and is inclined with respect to the rear side wall 12 and the right side wall 14.

A joining piece 15 is continuously provided on the right edge of the second inclined wall 16B via a first vertical ruled line L14. The joining piece 15 is formed in an elongated rectangle (see FIG. 2). The outer surface of the joining piece 15 is joined to the inner surface of the right side wall 14 with an adhesive. In this way, the second inclined wall 16B is connected to the rear edge of the right side wall 14.

When the joining piece 15 is joined to the inner surface of the right side wall 14 while folding the blank sheet S1 (see FIG. 2) along each ruled line, the front side wall 11, the rear side wall 12, the left side wall 13, the right side wall 14, the first inclined wall 16A and The second inclined wall 16B forms the hexagonal tubular body 10 in a plan view.

The upper lid 20 closes the upper opening of the body 10, and includes a pair of front and rear inner flaps 21 and 21 and a pair of left and right outer flaps 22 and 22.

The inner flap 21 on the front side is connected to the upper edge portion of the front side wall 11 via a horizontal ruled line L1. The front inner flap 21 closes the front region of the upper opening.
The left edge of the inner flap 21 on the front side is formed along the inner surfaces of the left side wall 13 and the first inclined wall 16A. The right edge portion of the front inner flap 21 is formed along the inner surface of the right side wall 14.
The front inner flap 21 is inserted into the upper opening of the body portion 10, and both side edges of the front inner flap 21 are in contact with the inner surfaces of the left side wall 13, the right side wall 14 and the first inclined wall 16A. ..

The inner flap 21 on the rear side is continuously provided to the upper edge portion of the rear side wall 12 via the horizontal ruled line L1. The rear inner flap 21 closes the rear region of the upper opening.
The right edge portion of the rear inner flap 21 is formed along the inner surfaces of both the right side wall 14 and the second inclined wall 16B. The left edge of the rear inner flap 21 is formed along the inner surface of the left side wall 13.
The rear inner flap 21 is inserted into the upper opening of the body portion 10, and both side edges of the rear inner flap 21 are in contact with the inner surfaces of the left side wall 13, the joint piece 15 and the second inclined wall 16B. ing.
In the first embodiment, the rear inner flap 21 is in contact with the inner surface of the joint piece 15, but the rear inner flap 21 may be in contact with the inner surface of the right side wall 14.

In the packaging box 1A, when the front and rear inner flaps 21 and 21 are closed with respect to the body 10, both inner flaps 21 and 21 enter into the upper opening of the body 10, and the inner flaps 21 and 21 cause the body 10 to move. The inner surface of the is supported. Therefore, even if the body portion 10 is empty, the body portion 10 can be accurately formed into a hexagonal shape and its shape can be maintained.

The left outer flap 22 is connected to the upper edge of the left side wall 13 via a horizontal ruled line L1. The left outer flap 22 overlaps the left half of the upper surfaces of the front and rear inner flaps 21, 21. The rear edge of the left outer flap 22 overlaps with the upper edge of the rear side wall 12.

The right outer flap 22 is connected to the upper edge of the right wall 14 via a horizontal ruled line L1. The right outer flap 22 overlaps the right half of the upper surfaces of the front and rear inner flaps 21, 21. Further, the front edge portion of the outer flap 22 on the right side overlaps with the upper edge portion of the front side wall 11.

In the packaging box 1A of the first embodiment, the joining piece 15 is joined to the inner surface of the right side wall 14, and the joining piece 15 is covered by the outer flap 22. Therefore, when the plurality of packaging boxes 1A is stacked, It is possible to prevent the joining piece 15 from peeling off due to the load.

The lower lid 20 closes the lower opening of the body 10, and includes a pair of front and rear inner flaps 21 and 21 and a pair of left and right outer flaps 22 and 22. The lower lid portion 20 and the upper lid portion 20 are vertically symmetrical.
In the lower lid portion 20, the inner flap 21 on the front side is continuously provided to the lower edge portion of the front side wall 11 via the horizontal ruled line L2, and the inner flap 21 on the rear side is connected to the rear wall 12 via the horizontal ruled line L2. It is connected to the lower edge of.
In the lower lid portion 20, the left outer flap 22 is connected to the lower edge portion of the left side wall 13 via the horizontal ruled line L2, and the right outer flap 22 of the right side wall 14 is connected via the horizontal ruled line L2. It is connected to the lower edge.

In the lower lid portion 20, left and right outer flaps 22, 22 overlap the lower surfaces of the front and rear inner flaps 21, 21.
In the lower lid portion 20, the front and rear inner flaps 21 and 21 are inserted into the lower opening portions of the body portion 10, and the inner surfaces of the body portion 10 are supported by the inner flaps 21 and 21.

In the blank sheet S1 shown in FIG. 2, from the right side to the left side of FIG. 2, the right side wall 14, the front side wall 11, the first inclined wall 16A, the left side wall 13, the rear side wall 12, the second inclined wall 16B, and the joining piece 15 are arranged. Are continuously provided in the lateral direction (left-right direction in FIG. 2).

In the blank sheet S1, the right edge portion of the front side wall 11 is connected to the left edge portion of the right side wall 14 via a first vertical ruled line L11 extending in the vertical direction (direction orthogonal to the horizontal direction in FIG. 2). It is set up.
In the blank sheet S1, the right edge of the first inclined wall 16A is connected to the left edge of the front side wall 11 via a second vertical ruled line L21 extending in the vertical direction.
In the blank sheet S1, the right edge portion of the left side wall 13 is connected to the left edge portion of the first inclined wall 16A via the first vertical ruled line L12.
In the blank sheet S1, the left edge of the left side wall 13 is connected to the right edge of the rear side wall 12 via a first vertical ruled line L13.
In the blank sheet S1, the left edge of the rear side wall 12 is connected to the right edge of the second inclined wall 16B via the second vertical ruled line L22.
In the blank sheet S1, the left edge portion of the second inclined wall 16B is continuously provided with the left edge portion of the joining piece 15 via the first vertical ruled line L14.

In the blank sheet S1, one edge in the vertical direction (edge on the back side in FIG. 2) becomes an upper edge when the packaging box 1A (see FIG. 1) is assembled. In the blank sheet S1, the other edge in the vertical direction (edge on the front side in FIG. 2) becomes a lower edge when the packaging box 1A is assembled.

The inner flaps 21 and 21 on the upper side are continuously provided at one edge of the front side wall 11 and the rear side wall 12 in the vertical direction via a horizontal ruled line L1.
Lower inner flaps 21 and 21 are continuously provided at the other vertical edge portions of the front side wall 11 and the rear side wall 12 via horizontal ruled lines L2.

The outer flaps 22, 22 on the upper side are connected to one edge of the left side wall 13 and the right side wall 14 in the vertical direction via a horizontal ruled line L1, respectively.
Lower outer flaps 22, 22 are continuously provided at the other vertical edges of the left side wall 13 and the right side wall 14 via a horizontal ruled line L2.

A notch groove L31 extending in the vertical direction is formed between the outer flap 22 continuously provided on the right side wall 14 and the inner flap 21 continuously provided on the front side wall 11. The cut groove L31 is formed on an extension of the first vertical ruled line L11.
A notch groove L31 is formed between the outer flap 22 continuously provided on the left side wall 13 and the inner flap 21 continuously provided on the rear side wall 12. The cut groove L31 is formed on an extension of the first vertical ruled line L13.

A cutout region K is formed between the inner flap 21 continuously provided on the front side wall 11 and the outer flap 22 continuously provided on the left side wall 13. The cutout region K is formed laterally in the vertical direction of the first inclined wall 16A.
A cutout region K is formed on the left side of the inner flap 21 that is continuous with the rear side wall 12. The cutout region K is formed laterally in the vertical direction of the second inclined wall 16B and the joining piece 15.

Next, the box making machine 100 for producing the blank sheet S1 will be described.
As shown in FIG. 3, the box making machine 100 is one in which the conveying path 110, the printing section 120, the creaser slotter section 130, the cutout section 140, and the joining section 150 are combined into one unit.

The transport path 110 is a transport device that moves the base sheet S, and includes a plurality of rollers. A supply section 111 for the base sheet S is provided at one end of the transport path 110, and a discharge section 112 for the blank sheet S1 is provided at the other end. The transport path 110 moves the base material sheet S from the supply unit 111 toward the discharge unit 112.
The printing unit 120, the creaser slotter unit 130, the cutout unit 140, and the joining unit 150 are provided between the supply unit 111 and the discharge unit 112 of the transport path 110.

As shown in FIG. 4, the base material sheet S is a rectangular corrugated cardboard sheet extending in the lateral direction (left and right direction in FIG. 4).
The transport path 110 (see FIG. 3) moves the substrate sheet S from one side (back side in FIG. 4) in the vertical direction to the other side (front side in FIG. 4).

The printing unit 120 prints on the outer surface of the base sheet S while moving the base sheet S, as shown in FIG. The printing unit 120 includes a cylindrical printing roll 121 that rotates around a horizontal axis.

In the printing unit 120, the ink is transferred to a stamp plate (not shown) attached to the outer peripheral surface of the printing roll 121. Then, when the base material sheet S passes through the printing roll 121, the printing plate of the printing roll 121 rolls on the outer surface of the base material sheet S, so that the outer surface of the base material sheet S is printed. The printing unit 120 is provided with a plurality of printing rolls 121 for each color of ink.

The creaser slotter unit 130 is arranged downstream of the printing unit 120 in the transport direction of the base sheet S.
As shown in FIG. 4, the creaser slotter unit 130 is a device that forms four first vertical ruled lines L11 to L14 and eight cut grooves L31 on the base material sheet S while moving the base material sheet S. is there.
The creaser slotter unit 130 includes four creasers 131 that rotate about a lateral axis and four slotters 135 that rotate about a lateral axis.

The creaser 131 is a disk-shaped member that rotates around an axis in the lateral direction (direction orthogonal to the transport direction). Four creasers 131 are attached to one rotating shaft 132 at intervals in the left-right direction. A convex portion extending in the circumferential direction is formed on the outer peripheral surface of the creaser 131.
When the base material sheet S passes through each of the creasers 131, the outer peripheral surface of each of the creasers 131 is pressed against the inner surface of the base material sheet S and rolls, so that the inner surface of the base material sheet S has four first vertical lengths. Ruled lines L11 to L14 are formed.

The slotter 135 is a disk-shaped member that rotates around a horizontal axis. The four slotters 135 are attached to one rotating shaft 136 at intervals in the left-right direction. The slotters 135 are arranged side by side with respect to the creasers 131 on the downstream side in the transport direction of the base sheet S. A cutting blade 137 is attached to the outer peripheral surface of the slotter 135.
When the base material sheet S passes through each slotter 135, the base material sheet S is cut out by the cutting blade 137 of each slotter 135. As a result, the cut groove L31 is formed on the extension of the first vertical ruled lines L11 to L14, and the portion of the joining piece 15 that is continuous in the vertical direction is cut off. The cut groove L31 is formed on one side and the other side in the vertical direction with respect to the first vertical ruled lines L11 to L14.

As shown in FIG. 3, the cutout portion 140 is arranged on the downstream side in the transport direction of the base material sheet S with respect to the creaser slotter portion 130.
In the cutout part 140, as shown in FIG. 5, while moving the base material sheet S, a part of the base material sheet S is cut out and two second vertical ruled lines L21 and L22 are formed.
The cutout portion 140 includes a cylindrical rotary die cutter 141 that rotates around a lateral axis.

A plurality of punching dies 142 are attached to the outer peripheral surface of the rotary die cutter 141. The punching die 142 is provided with a blade portion for cutting out a part of the base material sheet S and a convex portion for forming the second vertical ruled lines L21, L22 on the base material sheet S.

When the base material sheet S passes through the cutout portion 140, the rotary die cutter 141 rolls on the inner surface of the base material sheet S, and the respective cutting dies 142 are pressed against the inner surface of the base material sheet S.
As a result, in the base material sheet S, the left edge portion of the inner flap 21 continuous with the front side wall 11 is cut off, and the left edge portion of the inner flap 21 continuous with the rear side wall 12 is cut out.

Further, on the base material sheet S, two second vertical ruled lines L21 and L22 extending in the vertical direction are formed by the punching die 142. The second vertical ruled line L21 on the right side is formed on the right side of the first vertical ruled line L12 with a space and is parallel to the first vertical ruled line L12. The second vertical ruled line L21 on the left side is formed on the right side of the first vertical ruled line L14 at intervals and is parallel to the first vertical ruled line L14.

As shown in FIG. 3, the blank sheet S1 is formed by the base material sheet S passing through the printing section 120, the creaser slotter section 130, and the cutout section 140.

The joining section 150 folds the blank sheet S1 by the drive belt 151 and a guide member (not shown) while moving the blank sheet S1. In addition, the joining portion 150 applies an adhesive to the outer surface of the joining piece 15 (see FIG. 2) to join the joining piece 15 to the inner surface of the right side wall 14 (see FIG. 2).
The blank sheets S1 that have passed through the joining section 150 are stacked on the table of the discharging section 112.

Next, a method for manufacturing the blank sheet S1 in the first embodiment will be described.
First, as shown in FIG. 4, a base sheet S in which two horizontal ruled lines L1 and L2 are formed at intervals in the vertical direction is prepared. The base material sheet S is manufactured by a corrugator.
As shown in FIG. 3, when a large number of base material sheets S are stacked and arranged in the supply unit 111, the base material sheets S are sent to the printing unit 120 one by one by the transport path 110.
The base sheet S printed by the printing unit 120 is sent to the creaser slotter unit 130.

In the creaser slotter section 130, as shown in FIG. 4, four creasers 131 form four first vertical ruled lines L11 to L14 on the inner surface of the base sheet S.
As a result, the front side wall 11 surrounded by the two horizontal ruled lines L1 and L2 and the two first vertical ruled lines L11 and L12 is formed on the base material sheet S, and the two horizontal ruled lines L1 and L2 and the two horizontal ruled lines L1 and L2 are formed. The rear side wall 12 surrounded by the first vertical ruled lines L13 and L14 is formed.
Further, the base sheet S is formed with both lateral ruled lines L1 and L2, a first vertical ruled line L11 and a right side wall 14 surrounded by the right edge portion, and both lateral ruled lines L1 and L2 and two first ruled lines. A left side wall 13 surrounded by the vertical ruled lines L12 and L13 is formed.

Further, the base material sheet S is sent from the creaser 131 to the slotter 135. Then, the four slotters 135 form the cut grooves L31 on the extension lines of the respective first vertical ruled lines L11 to L14, and cut out the portion of the joining piece 15 that is continuous in the vertical direction.
As a result, the base sheet S has two inner flaps 21 and 21 continuous with one and the other of the front side wall 11 in the vertical direction and two inner flaps 21 and 21 with one and the other side of the rear side wall 12 in the vertical direction. Two inner flaps 21, 21 are formed.
In addition, the base sheet S has two outer flaps 22, 22 that are continuously provided on one side and the other side in the vertical direction of the right side wall 14, and two outer flaps 22 that are continuously provided on one side and the other side in the vertical direction of the left side wall 13. The outer flaps 22 and 22 and the joining piece 15 that is continuously provided on the rear side wall 12 are formed.

Then, as shown in FIG. 3, the base material sheet S is sent from the creaser slotter section 130 to the cutout section 140.
In the cutout portion 140, as shown in FIG. 5, a part of the base material sheet S is cut out by the cutting die 142 of the rotary die cutter 141, and two second vertical ruled lines L21 and L22 are formed on the base material sheet S. To be done.

By forming the two second vertical ruled lines L21 and L22 on the base material sheet S, the front side wall 11 becomes an area between the first vertical ruled line L11 and the second vertical ruled line L21. The rear side wall 12 is an area between the first vertical ruled line L13 and the second vertical ruled line L22.
A first inclined wall 16A is formed between the first vertical ruled line L12 and the second vertical ruled line L21, and a second inclined wall is formed between the first vertical ruled line L14 and the second vertical ruled line L22. The wall 16B is formed.

The left edge portion of the inner flap 21 that is continuously provided on the front side wall 11 of the base material sheet S is cut out by the punching die 142. As a result, a cutout region K is formed between the inner flap 21 continuous with the front side wall 11 and the outer flap 22 continuous with the left side wall 13.
In addition, the base sheet S is cut out by the punching die 142 at the left edge portion of the inner flap 21 that is continuously provided on the rear side wall 12. As a result, a cut-out region K is formed on the left side of the inner flap 21 that is continuously provided on the rear side wall 12.

In the first embodiment, the vertical ends of the first sloped wall 16A and the second sloped wall 16B are arranged by the punching die 142 so as to be arranged slightly outside the horizontal ruled lines L1 and L2 in the vertical direction. A part of the material sheet S is cut out.

In this way, the front side wall 11, the rear side wall 12, the left side wall 13, the right side wall 14, the first inclined wall 16A, the second inclined wall 16B, the joining piece 15, the inner flap 21, and the outer flap 22 are provided on the base material sheet S. By forming, the blank sheet S1 is formed.

In the method for manufacturing the blank sheet S1 of the first embodiment as described above, as shown in FIG. 3, the base sheet S is moved in one direction to pass through the creaser 131, the slotter 135, and the rotary die cutter 141. Then, the blank sheet S1 can be formed.
That is, in the method for manufacturing the blank sheet S1 of the first embodiment, it is not necessary to stop the base material sheet S when processing the base material sheet S. Therefore, the blank sheet S1 of the hexagonal packaging box 1A (see FIG. 1) can be continuously manufactured at high speed, and the manufacturing efficiency of the blank sheet S1 can be improved.

Further, in the method for manufacturing the blank sheet S1 of the first embodiment, the depth of the ruled line is easily adjusted as compared with the case where the ruled line is formed on the substrate sheet S by using the flat plate die cutter. A ruled line having a depth suitable for bending can be formed according to the thickness.

In the box making machine 100 used in the method for manufacturing the blank sheet S1 of the first embodiment, the cutting die 142 of the rotary die cutter 141 shown in FIG. 5 is changed to form the second vertical ruled lines L21 and L22 on the base material sheet S. You can choose not to. In this way, it is possible to form the blank sheet of the A-type packaging box in which the four side walls are laterally continuously arranged.
That is, the blank sheet S1 of the hexagonal packaging box 1A (see FIG. 1) and the blank sheet of the A-type packaging box can be manufactured by the same box making machine 100 and process. Further, when switching from the production of the blank sheet of the A type packaging box to the production of the blank sheet S1 of the hexagonal packaging box 1A, it is not necessary to remove the cutting blade 137 (see FIG. 4) from the slotter 135. Therefore, the production of the blank sheet of the A-type packaging box and the production of the blank sheet S1 of the hexagonal packaging box 1A can be quickly switched.
As described above, the manufacturing method of the blank sheet S1 of the first embodiment can be performed by the box making machine 100 capable of manufacturing the blank sheet of the general A-type packaging box, and thus the manufacturing cost of the hexagonal packaging box 1A. Can be reduced.

Further, in the method for manufacturing the blank sheet S1 of the first embodiment, both longitudinal end portions of the first inclined wall 16A and the second inclined wall 16B are arranged slightly outside the horizontal ruled lines L1 and L2 in the longitudinal direction. As described above, a part of the base sheet S is cut off by the punching die 142.
When the packaging box 1A is assembled from such a blank sheet S1, the upper ends and lower ends of the inclined walls 16A and 16B project more than the upper ends and lower ends of the side walls 11 to 14, as shown in FIG. As a result, when the inner flap 21 is closed, it becomes easier for the inner flap 21 to support the inner surfaces of the inclined walls 16A and 16B.

The first embodiment of the present invention has been described above, but the present invention is not limited to the first embodiment, and can be appropriately modified without departing from the spirit thereof.
As shown in FIG. 1, the blank sheet S1 of the first embodiment is provided with an inner flap 21 and an outer flap 22 that serve as a lid portion 20 that closes the upper opening of the body portion 10. However, the configuration of the lid 20 is not limited, and the central portion of the lid 20 may be opened. Alternatively, a tray-shaped packaging box in which the upper opening of the body 10 is opened may be formed without providing the flap serving as the upper lid 20.

Further, the width and height of the side walls 11 to 14 and the inclined walls 16A and 16B are not limited. Moreover, the number of the inclined walls 16A and 16B is not limited. Further, the inclination angles of the inclined walls 16A and 16B with respect to the side walls 11 to 14 are not limited. For example, the side walls 11 to 14 and the inclined walls 16A and 16B may be formed to have the same width, and the body portion 10 may be formed to have a regular hexagonal shape.

The blank sheet S1 of the first embodiment is made of corrugated cardboard, but the blank sheet S1 can be formed by various known paperboards.

[Second embodiment]
Next, a method for manufacturing the blank sheet of the second embodiment will be described.
The blank sheet manufacturing method of the second embodiment is a method of manufacturing the blank sheet S2 (see FIG. 7) of the hexagonal packaging box 1B shown in FIG.
The packaging box 1B of the second embodiment has substantially the same configuration as the packaging box 1A of the first embodiment (see FIG. 1), but the configuration of the lower lid portion 30 is different.

The lower lid portion 30 of the second embodiment includes a front flap 31 that is continuously provided at the lower edge portion of the front side wall 11, and a pair of left and right lid portions that are continuously provided at the lower edge portions of the left side wall 13 and the right side wall 14. It is provided with side flaps 32, 32 and a rear flap 33 that is continuously provided on the lower edge of the rear side wall 12.

The front flap 31 is connected to the lower edge of the front side wall 11 via a horizontal ruled line L2. The front flap 31 closes the front region of the lower opening of the body 10.
The right edge of the front flap 31 is formed along the inner surfaces of the left side wall 13 and the first inclined wall 16A. When the front flap 31 has entered the lower opening of the body 10, the right edge of the front flap 31 is in contact with the inner surface of the first inclined wall 16A.

The left side flap 32 is connected to the lower edge of the left side wall 13 via a horizontal ruled line L2. The front portion of the left side flap 32 is overlapped with the lower surface of the front flap 31.
The rear edge of the left side flap 32 is formed along the inner surfaces of the rear side wall 12 and the second inclined wall 16B. When the left side flap 32 is in the lower opening of the body 10, the rear edge of the left side flap 32 is in contact with the inner surface of the second inclined wall 16B.

The right side flap 32 is connected to the lower edge of the right side wall 14 via a horizontal ruled line L2. The front portion of the right side flap 32 is overlapped with the lower surface of the front flap 31.

The rear flap 33 is connected to the lower edge of the rear side wall 12 via a horizontal ruled line L2. The rear flap 33 is formed in a trapezoidal shape whose width in the left-right direction becomes narrower from the base end portion toward the tip end portion.

When closing the lower lid portion 30, the rear flap 33 is overlapped with the lower surfaces of the left and right side flaps 32, 32, and the front end portion is inserted into the upper surface side of the central portion of the front flap 31.
The lower lid 30 is closed by combining a front flap 31, left and right side flaps 32, 32 and a rear flap 33 with an American lock system.

Next, a method for manufacturing the blank sheet S2 in the second embodiment will be described.
The blank sheet S2 of the second embodiment shown in FIG. 7 can be manufactured using the box making machine 100 (see FIG. 3) of the first embodiment described above. In the second embodiment, the shape of the cutting die 142 attached to the rotary die cutter 141 is different from that of the first embodiment.

In the method for manufacturing the blank sheet S2 of the second embodiment, as in the first embodiment, the base sheet S on which the two horizontal ruled lines L1 and L2 are formed is prepared and printed on the base sheet S in the printing unit. To do. After that, the first vertical ruled lines L11 to L14 and the cut groove L31 are formed in the base material sheet S in the creaser slotter portion.

Subsequently, in the cutout portion 140, a part of the base material sheet S is cut off by the cutting die 142 of the rotary die cutter 141, so that the base material sheet S has a front flap 31, left and right side flaps 32, 32, and The rear flap 33 is formed. Moreover, the second vertical ruled lines L21 and L22 are formed on the base material sheet S by the punching die 142, and the first inclined wall 16A and the second inclined wall 16B are formed. In this way, the blank sheet S2 is formed.

In the manufacturing method of the blank sheet S2 of the second embodiment as described above, the blank sheet S2 can be formed while moving the base material sheet S in one direction. Therefore, the manufacturing efficiency of the hexagonal packaging box 1B having the American lock type lid portion 30 shown in FIG. 6 can be improved.

Further, in the method for manufacturing the blank sheet S2 of the second embodiment, since it can be carried out by the box making machine capable of manufacturing the blank sheet of the general A-type packaging box, the hexagonal shape having the lid 20 of the American lock system is used. The manufacturing cost of the packaging box 1B can be reduced.

Although the second embodiment of the present invention has been described above, the present invention is not limited to the second embodiment, and like the first embodiment, can be appropriately modified without departing from the spirit thereof. Is.
For example, in the second embodiment, similarly to the first embodiment, the shape of the upper lid portion is not limited, and the central portion of the upper lid portion may be opened. Alternatively, a tray-shaped packaging box having an opening on the upper side may be formed.

Further, in the second embodiment, similarly to the first embodiment, the width and height of the side walls 11 to 14 and the inclined walls 16A and 16B are not limited. Moreover, the number of the inclined walls 16A and 16B is not limited. Further, the inclination angles of the inclined walls 16A and 16B with respect to the side walls 11 to 14 are not limited.

Also in the second embodiment, the blank sheet S2 can be formed by various known paperboards as in the first embodiment.

1A packaging box (first embodiment)
1B packaging box (second embodiment)
10 Body 11 Front Side Wall 12 Rear Side Wall 13 Left Side Wall 14 Right Side Wall 15 Joining Piece 16A First Inclined Wall 16B Second Inclined Wall 20 Lid (First Embodiment)
21 Inner Flap 22 Outer Flap 30 Lid (Second Embodiment)
31 Front flap 32 Side flap 33 Rear flap 100 Box making machine 110 Conveying path 111 Feeding section 112 Discharging section 120 Printing section 121 Printing roll 130 Creaser slotter section 131 Creaser 132 Rotating shaft 135 Slotter 136 Rotating axis 137 Cutting blade 140 Cutout portion 141 Rotary die cutter 142 Cutting die 150 Joining portion 151 Driving belt K Cutting area L1 Horizontal ruled line L2 Horizontal ruled line L11 First vertical ruled line L12 First vertical ruled line L13 First vertical ruled line L14 First vertical ruled line L21 Second vertical ruled line L22 Second vertical ruled line L31 Notch groove S Base material sheet S1 Blank sheet (first embodiment)
S2 blank sheet (second embodiment)

Claims (3)

A method of manufacturing a blank sheet, wherein an inclined wall is formed between adjacent side walls, and a flap of a lid is continuously provided on the side wall,
Two horizontal ruled lines extending in the horizontal direction, a step of preparing a paper base sheet formed with a space in the vertical direction orthogonal to the horizontal direction,
With respect to the base sheet that moves in the vertical direction, a slotter that rotates around the horizontal axis while forming a first vertical ruled line that is a side edge portion of the side wall by a creaser that rotates around the horizontal axis. A step of forming a cut groove on an extension line of the first vertical ruled line by a cutting blade attached to the outer peripheral portion of,
With respect to the base sheet that moves in the longitudinal direction, at least one side of the flaps that are laterally adjacent to each other by the blade part of the die attached to the outer peripheral surface of the rotary die cutter that rotates around the axis in the lateral direction. A second vertical ruled line is formed beside the first vertical ruled line by the cut-out convex portion and the inclined wall is formed between the first vertical ruled line and the second vertical ruled line. Process,
A method for manufacturing a blank sheet, comprising: It is a manufacturing method of the blank sheet according to claim 1,
In the transport path for moving the base sheet in the longitudinal direction, the creaser, the slotter and the rotary die cutter are provided,
With the four creasers arranged in the lateral direction, while forming the first vertical ruled line on the base sheet,
A method for manufacturing a blank sheet, characterized in that the cut groove is formed in the base sheet by the four slotters arranged in the lateral direction. It is a manufacturing method of the blank sheet according to claim 1 or claim 2,
A method for manufacturing a blank sheet, characterized in that a part of the base material sheet is cut out by the punching die so that an end portion in the vertical direction of the inclined wall is arranged outside of the horizontal ruled line in the vertical direction. ..

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