JPH11236011A - Manufacture of paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To partially and easily change the outer peripheral shape of carton blanks without time or labor. SOLUTION: In a manufacturing method in which carton blanks are folded and joined to manufacture a paper container 1 after a paper is punched to form the carton blanks in a developed condition, a plurality of carton blanks are stacked, loaded and arranged, and the peripheral parts of a plurality of stacked carton blanks are additionally worked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a paper container which is punched out of a paper material in a developed state, bent into a box shape, and filled with drinks such as milk and juice.

[0002]

2. Description of the Related Art A paper container filled with drinks such as milk and juice is formed by punching out a paper material to form a carton blank in an expanded state, and then folding and joining the carton blank to form a box shape. I have.

[0003] When forming a carton blank in an unfolded state, a roll-shaped paper material or a sheet-shaped paper material is punched by a so-called flat die, or
Processing is performed by cutting the outer peripheral portion with a so-called rotary die cutter. For this reason, a flat die for each shape of the carton blank to be punched and a dedicated cutter segment for cutting the outer peripheral portion into the shape of the carton blank are used.

[0004] In addition, the step of forming such carton blanks is continuously performed in a printing apparatus that prints necessary indications about pictures and contents on the surface of the carton blanks. Then, the carton blanks carried out of the apparatus are bent into a box shape, necessary portions are welded, and the inside is filled with milk, juice, and other contents, and then sealed.

[0005]

In the above-described method for manufacturing a paper container, in order to change the shape of the carton blanks in order to change a part of the outer shape of the paper container, the flat die and the cutter segment must be separated from each other. Need to be replaced.

However, when it is desired to partially change the outer peripheral portion of the carton blank, if the flat die or the cutter segment is changed to another one, it takes a very long time to replace and very troublesome adjustment at the time of replacement. In addition, the production operation rate is greatly reduced and the production cost is high.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a paper container is manufactured by punching out a paper material to form a carton blank in an expanded state, and then folding and joining the carton blank. A method for manufacturing a paper container, wherein a plurality of the carton blanks are accumulated, stacked, aligned, and then subjected to additional processing on the outer peripheral portions of the stacked plurality of carton blanks. .

In this paper container manufacturing method, after the carton blanks are formed, a plurality of carton blanks are accumulated, stacked, aligned, and subjected to additional processing on the outer peripheral portion. Therefore, even when it is desired to partially change the outer peripheral portion of the carton blanks, the outer peripheral portion can be partially changed collectively by simply accumulating a plurality of carton blanks, loading, aligning, and then performing additional processing. So you can
There is no need to change flat dies or cutter segments to punch carton blanks. As a result, the outer peripheral shape of the carton blank can be partially and easily changed without taking time and effort.

According to a second aspect of the present invention, there is provided a method of manufacturing a paper container according to the first aspect, wherein a plurality of stacked and stacked carton blanks are arranged on an alignment conveyor belt for aligning the plurality of carton blanks. Is transferred by the transfer means.

In this method of manufacturing a paper container, a plurality of carton blanks that have been punched and formed into a predetermined shape are stacked, loaded and transferred on a transfer belt for alignment by a transfer means. Let it. Then, after aligning the plurality of carton blanks, the outer peripheral shape of the carton blanks is partially additionally processed.

According to a third aspect of the present invention, there is provided the paper container manufacturing method according to the second aspect, wherein the transfer means is disposed between a plurality of alignment transport belts and a plurality of carton blanks are mounted thereon. A plurality of loading blocks for lowering and then placing a plurality of carton blanks on the alignment conveyor belt, and a robot for transferring the stacked and loaded plurality of carton blanks onto the plurality of loading blocks It is characterized by consisting of an arm.

In this method of manufacturing a paper container, a plurality of carton blanks that have been punched and formed into a predetermined shape are accumulated, and are loaded onto a loading block by a robot arm in a loaded state. Next, the loading block on which multiple carton blanks are transferred descends,
A plurality of carton blanks are placed on the alignment conveyor belt.

[0013] The invention of claim 4 is the invention of claim 2 or claim 3.
The method for producing a paper container according to claim 1, wherein one side of the plurality of carton blanks is aligned with an alignment plate on which one side of the plurality of carton blanks transported by the alignment transport belt abuts and slides. And

In this method for manufacturing a paper container, a plurality of carton blanks placed on the alignment conveyor belt are transported so that one side thereof abuts and slides on the alignment plate while being conveyed, thereby forming one of the carton blanks. The sides are aligned.

[0015] The invention of claim 5 is the invention of claims 1 to 4.
In the invention described above, the additional processing is an arc-shaped notch formed on an outer peripheral portion of the carton blanks and capable of displaying information on contents to be filled in a paper container.

In this method for manufacturing a paper container, arc-shaped notches are formed in the outer peripheral portions of the aligned plurality of carton blanks by additional processing. In this case, the outer peripheral shape of the carton blank can be partially changed without replacing the flat die or the cutter segment forming the carton blank.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a paper container according to the present invention will be described below. FIG. 1 shows a completed paper container 1, and FIG. 2 is an enlarged view of a part of the paper container 1. FIG.
FIG. 6 to FIG. 6 show a procedure for forming the unfolded carton blanks 6 from one sheet of paper material 7.

As shown in FIG. 1, the paper container 1 of the present embodiment
Is, for example, a box-shaped milk pack filled with milk, etc.
It comprises a bottom part 2, a side part 3, and a container top part 4.
As shown in FIG. 2, an arc-shaped notch 5 formed by additional processing is formed in the container top portion 4.

Next, a method of manufacturing the paper container 1 forming the paper container 1 and a transfer means used in the manufacturing method will be described.

As shown in FIG. 3, a sheet-like paper material 7 is punched to form a carton blank 6 in a developed state. This punching step is performed in a printing device (not shown) that prints a pattern on the side surface portion 3. By this punching step, as shown in FIG. 4, unnecessary portions 8 and the unfolded carton blanks 6 are punched out of the paper material 7, and a folding line 9 is formed. The carton blanks 6 have four bottom surfaces 2a, 2b, 2c for forming the bottom portion 2.
2d and four side surfaces 3a and 3 for forming the side surface portion 3.
b, 3c, 3d, four upper surfaces 4a, 4b, 4c, 4d forming the container top portion 4, and a margin portion 10 provided continuously on the side surface 3a, the bottom surface 2a, and the upper surface 4a. I have. At this time, the arc-shaped notch 5 is not formed in the container top portion 4.

A plurality of the carton blanks 6 thus formed are stacked and stacked as shown in FIG. As shown in FIG. 6, a plurality of stacked and stacked carton blanks (hereinafter referred to as “product blocks”) 11 are stacked in a block shape and placed on the blocks 12 and 13. In this state, each carton blank 6
Are not aligned and each carton blank 6
Are not aligned. Product block 1 in this state
1 is transferred by the transfer means 14 onto the plurality of alignment transfer belts 15a, 15b, 15c, and 15d.

As shown in FIG. 7, the transfer means 14 is arranged between the four aligning conveyor belts 15a, 15b, 15c, and 15d, on which the product blocks 11 (a plurality of carton blanks 6) are mounted. After the product block 11 is lowered, the product block 11 is placed on the alignment conveyor belts 15a, 15b, 15c, and 15d.
Are placed on the nine loading blocks 16a, 16b,...
16i and nine loading blocks 16
a, 16b... Robot arm 1 transferred on 16i
7

Then, as shown in FIG.
As shown in FIG. 7, a product block 11 composed of a plurality of carton blanks 6 stacked and stacked on the two forks 17a,
7b, the conveying belts for alignment 15a to 15
After moving on the stacking block 16a, as shown in FIG.
Ｉ16i. The loading blocks 16a to 16i on which the product blocks 11 are placed are lowered, and the product blocks 11 are placed on the alignment conveyor belts 15a to 15d.

On the alignment conveyor belts 15a to 15d,
As shown in FIGS. 9A and 9B, the alignment plate 18 is arranged along the transport direction of the alignment transport belts 15a to 15d, and the product block 11 transported by the alignment transport belts 15a to 15d. Are abutted and slid, so that one side of the plurality of carton blanks 6 is aligned and aligned. In this case, the stacked plurality of carton blanks 6 are pressed by the pressing plate (not shown) toward the alignment plate 18 while being transported, and further pressed against one side in the transport direction to be aligned.

After the plurality of carton blanks 6 are aligned, additional processing is performed on the outer peripheral portions of the stacked plurality of carton blanks 6 until they are conveyed to the feeder 19 in the next step. In this additional processing, arc-shaped notches 5, 5 are formed in the upper surfaces 4b, 4d forming the container top portion 4. As shown in FIGS. 1 and 2, these cutouts 5, 5 are joined together when the container top is sealed to form one cutout.

In order to form the cutouts 5 and 5 partially (in this case, the container top portion 4) on the outer periphery of the plurality of carton blanks 6 by the additional processing, the container of the plurality of carton blanks 6 as the product block 11 is formed. The cutting is performed by cutting a side end portion of the top portion 4 with a rotating blade, for example, a circular cutter or a punch.

Note that the arc-shaped notches 5 and 5 are used for touching information on the contents to be filled in the paper container 1, for example, information on whether the contents are milk or juice, or It can be displayed by visual recognition. Also, various information can be displayed by changing the shape, quantity, and the like of the notch 5.

According to the method for manufacturing a paper container of the present embodiment,
Even if it is desired to partially change the outer peripheral portion after forming the carton blanks 6 once, it can be performed by accumulating, laminating and aligning a plurality of carton blanks 6 and then performing additional processing collectively. Therefore, it is not necessary to change the flat die and the cutter segment for forming the carton blanks 6, so that the time for replacing them and the trouble of adjusting them can be omitted, and the outer peripheral shape of the carton blanks 6 can be easily partially changed. can do. In addition, it is possible to prevent a rise in manufacturing cost.

Further, in the method for manufacturing a paper container according to the present embodiment, when it is desired to partially change the outer periphery of the paper container, processing is not performed in the printing apparatus, so that processing can be performed for different types of products.

Further, the specification of the outer peripheral shape can be easily selected.

Further, in the paper container manufacturing method of the present embodiment, a shape specification required immediately before the next step, that is, a step of filling contents such as milk and sealing the container top portion, is selected. Can be processed.

[0032]

As described above, according to the first aspect of the present invention, even when it is desired to partially change the outer peripheral portion of the carton blanks, a plurality of carton blanks are stacked, stacked, and aligned. Since the outer peripheral portion can be partially changed only by additional processing later, it is not necessary to change the flat die or the cutter segment for punching the carton blanks. As a result, the outer peripheral shape of the carton blank can be partially and easily changed without taking time and effort. Thereby, the manufacturing cost can be reduced.

According to the second aspect of the present invention, after the plurality of carton blanks are aligned, the outer peripheral shape of the carton blanks can be partially processed further, so that the outer periphery of the paper container can be partially changed. In this case, it is not necessary to replace the flat die and the cutter segment, and the outer shape of the carton blank can be partially and easily changed.

According to the third aspect of the present invention, a plurality of carton blanks that have been punched and formed into a predetermined shape are accumulated, and are transferred to the loading block by the robot arm in a loaded state. By lowering, a plurality of carton blanks are placed on the alignment transport belt, so that they can be automatically placed on the alignment transport belt after stacking and laminating, and can be easily aligned.

According to the fourth aspect of the present invention, the plurality of carton blanks placed on the aligning conveyor belt are transported so that one side thereof abuts and slides on the aligning plate while being conveyed, thereby forming the carton blanks. One side can be easily and automatically aligned.

According to the fifth aspect of the present invention, since the outer peripheral portions of the aligned plurality of carton blanks are formed with an arc-shaped notch by additional processing, the flat die or cutter segment forming the carton blanks is replaced. In addition, the outer peripheral shape of the carton blank can be partially and easily changed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a paper container.

FIG. 2 is an enlarged perspective view showing a container top of the paper container of FIG.

FIG. 3 is a plan view showing a step of punching carton blanks from a paper material.

FIG. 4 is a plan view showing a carton blank.

FIG. 5 is a perspective view showing a state in which a plurality of carton blanks are stacked and stacked.

FIG. 6 is a side view showing a state in which a plurality of carton blanks are stacked and a stacked product block is placed on the block.

FIG. 7 is a plan view showing a state in which a product block is placed on an alignment conveyance belt by a transfer unit.

FIG. 8 is a side view showing a state in which a product block is placed on an alignment conveyor belt by a transfer unit.

FIG. 9 shows a product block on a conveying belt for alignment;
(A) is a plan view and (b) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper container 4 Container top part 5 Notch 6 Carton blanks 7 Paper material

Claims (5)

[Claims] 1. A method for manufacturing a paper container in which a carton blank is formed by punching out a paper material to form a developed carton blank, and then folding and joining the carton blank to manufacture a paper container, wherein a plurality of the carton blanks are integrated. Then, after stacking and aligning, an outer peripheral portion of the plurality of stacked carton blanks is subjected to additional processing, thereby manufacturing a paper container. 2. The method for manufacturing a paper container according to claim 1, wherein the plurality of stacked and stacked carton blanks are transferred by a transfer means onto an alignment conveyor belt for aligning the plurality of carton blanks. A method for manufacturing a paper container, wherein the paper container is transferred. 3. The method for manufacturing a paper container according to claim 2, wherein said transfer means is disposed between a plurality of aligning conveyor belts and lowered after a plurality of carton blanks are mounted. A plurality of loading blocks for placing a plurality of carton blanks on the carrying belt for alignment, and a robot arm for transferring the plurality of stacked and loaded carton blanks onto the plurality of loading blocks. A method for producing a paper container, comprising: 4. The method for manufacturing a paper container according to claim 2, wherein one side of the plurality of carton blanks conveyed by the alignment conveyer belt is a plurality of carton blanks which are in contact with and slide with each other. A method for manufacturing a paper container, wherein one side of a plurality of carton blanks is aligned. 5. The arc-shaped display according to claim 1, wherein the additional processing is formed on an outer peripheral portion of the carton blanks and is capable of displaying information of contents to be filled in a paper container. A method for producing a paper container, characterized in that the paper container is notched.