JP2002154527A - Paper container for beverage or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container for beverage or the like, which can be folded flat by easily pushing bottom seal flaps upwards with fingers for easy facilitation of recycling of the paper container after use. SOLUTION: In the paper container, recessed faces are defined by making upward hollows in two sides of its bottom towards the inside of the container, thereby eliminating the need to bend and affix bottom seal flaps to the bottom when forming the paper container. In addition, creases are provided in both sides of a web of paper in advance so as to facilitate the formation of the recessed faces. Therefore, a required shape can easily be formed when the web of paper is folded into the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a paper container for beverages and the like.

[0002]

2. Description of the Related Art When a paper container for storing beverages and the like is used for sports and outdoor activities, and once the paper container is opened after drinking with a straw or the like and the paper container is discarded, the paper containers are easily recyclable by hand. Is folded and discarded.

[0003]

However, due to the shape of the container, the bottom seal flap of the horizontal line seal portion at the time of forming the container is folded at the lower part of the side and fixed to the bottom of the container by glue or thermocompression. At this time, the tip of the bottom seal flap is fixed in a state of being in close contact with the bottom of the paper container. Therefore, when a container having such a shape is folded and flattened at the time of recycling, it is necessary to pull up the seal flap formed on the bottom surface with a finger, but at this time, a burden is sometimes applied to the nail, and the nail may be damaged. there were.
Also, since it is difficult to pull up the bottom seal flap, the paper container may be discarded without being completely folded and abandoned, and may be discarded during recycling. It was difficult to arrange used paper containers, which sometimes hindered recycling.

The present invention has been made in view of the above circumstances, and provides a paper container for beverages and the like which can be easily lifted with a finger and a seal flap on the bottom of the container can be opened without damaging a nail when the paper container is recycled after use. The purpose is to do.

[0005]

According to a first aspect of the present invention, in a paper container, two sides of a bottom surface of which the bottom surface is in contact with other side surfaces are defined as inner surfaces of the paper container with reference to two sides of which the bottom surface is in contact with the front and rear surfaces. It is characterized in that it is possible to provide a paper container which does not need to be fixed to the bottom portion with a bottom surface sealing flap which is bent along the bottom surface when forming the paper container by lifting to the side to form a concave surface. Therefore, since the bottom seal flap is a paper container that does not adhere to the bottom, the bottom seal flap can be easily lifted without damaging a finger when lifting the bottom seal flap to flatten and discard the paper container. Claim 2
The invention of claim 1 is a paper container for beverages or the like according to claim 1, wherein the bottom surface and the bottom surface seal flap are formed by folding lines on both sides of the paper container on a paper web so that the flap is easily lifted toward the inner surface of the paper container to form a concave surface. Since it is a paper container for beverages and the like, which is provided in advance, a desired shape can be easily formed when the paper web is bent into a container shape.

[0006]

FIG. 1 is an external view showing a state of a paper container according to an embodiment of the present invention. Drawing 2 is an explanatory view of a paper container of an embodiment of the present invention, and is a perspective view which looked at a bottom seal flap from the lower part of a paper container main part. FIG. 3 is a plan view showing a folding line formed on the web-shaped paper packaging material at a stage before the paper container of the embodiment of the present invention is formed. FIG. 4 is a schematic view of a filling machine for forming a paper container according to the embodiment of the present invention. FIG. 5 is a schematic view of a main part of a filling machine for forming a paper container according to the embodiment of the present invention.

Conventionally, in a filling machine for producing a packaging container filled with liquid foods such as milk and soft drinks, a web-like packaging material is continuously formed into a tube while being conveyed.
Liquid food is filled in a tubular packaging material. In the figure, reference numeral 11 denotes a packaging material, 30 denotes a sterile room disposed at a predetermined position of the filling machine, and the packaging material 11 is set on the filling machine in a state of a reel 12, and is fed by a feeding machine (not shown). And is conveyed in the form of a web in the filling machine. The wrapping material 11 is formed by cutting a wide base paper (not shown) at a plurality of positions in a vertical direction, and folds m1, m2, and m11 to m14 are formed in advance.

The packaging material 11 fed out by the feeder is guided by rollers R1 to R5 (not shown) and supplied to the aseptic chamber 30.
6, guided by R7, subsequently conveyed upward in the aseptic chamber 30, guided by rollers 32, conveyed diagonally upward, and sent to the air knife section 33. Subsequently, the packaging material 11 is conveyed obliquely upward in the air knife portion 33, during which the sterilizing agent and the like attached to the packaging material 11 are removed by hot air discharged from a nozzle (not shown).

The packaging material 11 discharged from the air knife section 33
Is sent to the first guide roller 34, guided by the first guide roller 34, conveyed downward, and sent to the second guide roller 35. After being guided by the second guide roller 35, the packaging material 11 is conveyed obliquely upward, sent to the third guide roller 36, and guided by the third guide roller 36. Is conveyed downward, is gradually curved while being guided by a forming ring or the like (not shown) as a packaging material tube forming means, is formed into a tube shape, and is vertically sealed by a vertical sealing device (not shown), and the packaging material tube is It will be 41.

Then, while the packaging tube 41 is conveyed downward, liquid food is supplied from above through the filling pipe 13 and is filled in the packaging tube 41. In addition,
The first to third guide rollers 34 to 36 are used for the packaging material 11.
Is disposed rotatably on the upstream side of the forming ring in the conveying direction of the first direction, and guides the packaging material 11.

[0011] Thereafter, the packaging tube 41 is placed in the sterile room 30.
And is sent to a horizontal sealing device (not shown), where it is sandwiched from both sides and sealed in the horizontal direction at predetermined intervals to form a horizontal sealing portion.
Subsequently, in the horizontal seal portion, the packaging material tube 41 is cut by a cutting device (not shown), and the prototype container 14 having a pillow shape, a bag shape, or the like is separated. Then, each prototype container 14 is formed into a predetermined shape along the preformed folds m1, m2, m11 to m14 by a molding device (not shown), and the packaging container 15 is completed.

Since the cross section of the packaging tube 41 has a substantially circular shape, it is difficult to position the packaging tube 41 while the packaging tube 41 is being transported. Therefore, when the packaging material tube 41 rotates, for example, by receiving a force from the forming ring, the overlap portion S2 shifts from a predetermined position. And
When the packaging container 15 is completed by forming the prototype container 14 into a predetermined shape while the overlap portion S2 is displaced from the predetermined position, the fold m
The position of 1, m2 does not match the actual position of the fold, and the appearance of the packaging container 15 deteriorates.

In view of the above, a CCD (not shown) serving as a light detecting unit is disposed near the exit of the packaging tube 41 from the sterile chamber 30 so as to face the packaging tube 41.
The overlap portion S2 is detected based on the sensor output of the first portion, and the first portion as a detection result of the overlap portion S2 is detected.
Of the first guide roller 34 based on the detection data of
Is moved in the transport direction of the packaging material 11 in the air knife section 33.

That is, when the packaging material 11 is transported between the roller 32 and the first guide roller 34 and reaches the first guide roller 34, the transport surface of the packaging material 11 and the first guide roller 34 The direction in which one end of the roller 34 is moved is made parallel.

In this case, while the packaging material 11 is guided by the first guide roller 34, the first guide roller 3
The first guide roller 34 is moved axially on the surface of the first guide roller 34 in accordance with the amount by which one end of the first guide roller 4 has moved. That is, the packaging material 11 can be moved in a direction perpendicular to the transport direction. Therefore, since the positions of the edges 11a and 11b of the packaging material 11 that are curved by the forming ring change, the overlapping portion S2 can be moved, the position of the overlapping portion S2 is adjusted, and the overlapping portion S2 is moved. It can be put in place.

As a result, when the prototype container 14 is molded and the packaging container 15 is completed, the positions of the folds m1 and m2 formed in advance on the packaging material 11 match the actual fold positions. 15 can be improved in appearance.

Further, in order to adjust the position of the overlap portion S2, the paper guide is connected to the edges 11a, 1
Since it is not necessary to press against the edge 1b, the edges 11a and 11b of the packaging material 11 are not damaged.

Further, since the conveying surface of the packaging material 11 sent to the first guide roller 34 and the direction in which one end of the first guide roller 34 is moved are made parallel, the overlapping portion S2 is moved to a predetermined position. , The transport state of the packaging material 11 can be prevented from greatly changing.

Note that instead of moving one end of the first guide roller 34, one end of the second guide roller 35 is moved, or one end of the first and second guide rollers 34, 35 is moved mutually. You can also. When one end of the second guide roller 35 is moved, the packaging material 11 is transported between the first and second guide rollers 34 and 35 and reaches the second guide roller 35. And the direction in which one end of the second guide roller 35 is moved is set in parallel.

The paper container is completed by the method described above. As shown in FIGS. 1 and 2, the paper container main body 15 is, for example, a rectangular box type (brick pack type) formed of composite paper containing resin. In the manufacturing process of the paper container 15, after filling the contents, the bottom seal flap sealed with the horizontal line is folded together with the bottom surface 17 of the paper container body 15 without being fixed. FIG. 6 is a plan view showing a folding line formed in a web-shaped paper packaging material at a stage before a conventional paper container is formed. As shown in the figure, the folding line of the bottom seal flap has a flat bottom surface. It is a straight line for this. On the other hand, as shown in FIG. 3, according to the method of the present invention, since the folding line m2 of the bottom seal flap is curved, the bottom surface can be easily concaved when the container is formed.

FIG. 7 is an explanatory view of a conventional paper container, and is a perspective view of the bottom seal flap from below the paper container main body. As shown in the figure, the bottom surface is formed so that the four sides of the bottom surface are flush with each other, and the bottom seal flap of the horizontal line seal portion when forming the container is folded at the lower part of the side surface and is not shown on the container bottom surface. Are fixed by glue or thermocompression bonding. At this time, the tip SF of the bottom seal flap
2 is firmly attached to the bottom surface of the paper container in a state of close contact. Therefore, when recycling the container having such a shape, when the container is folded and flattened, it is necessary to pull up the seal flap formed on the bottom surface with a finger, but in this case, a burden is sometimes applied to the nail and the nail may be damaged. There was sex.

FIG. 2 is an explanatory view of the paper container according to the embodiment of the present invention, and is a perspective view of the bottom seal flap viewed from below the paper container main body. In this case, the two sides of the bottom surface in contact with the other side surface are lifted to the inside surface of the paper container while the bottom surface of the paper container is held on the basis of the two sides contacting the front and rear surfaces, and the seal flap has a concave bottom surface. It is bent to concave shape. At this time, the side portion near the bottom surface is convex with respect to the paper container, and the bent portion of the seal flap is bent in a curved line, so that the bent portion is restored and the force returning to the direction of eliminating the bending can be offset. .

In other words, when the paper container is formed, simply bending the paper container toward the bottom surface causes the bent bottom seal flap to bend into a concave surface, so that the entire paper container stores a force for maintaining the bent shape. Therefore, the seal flap can provide a paper container that can maintain its shape without being fixed to the bottom portion, and is a paper container for beverages and the like.

The other horizontal line seal is folded at the upper part of the side surface and is fixed to the side surface of the container as an upper seal flap. The upper seal flap has a seal flap tip SF1 on the side surface of the container and an adjacent lower seal flap. Since the seal flap is formed so as not to be in close contact with the surface of the container side so as to be able to work on the seal flap with a finger, it is easy to work without damaging the claws. Therefore, there is no functional problem even if the top seal flap tip SF1 in the paper container of the embodiment of the present invention shown in FIG. 1 is the same as the conventional shape.

FIG. 8 is a plan view and a sectional view showing a state in which the used paper container is flattened to facilitate recycling. As shown in the figure, the paper container is flattened by easily causing the bottom seal flap and the top seal flap, and becomes bulky and easy to handle during recycling.

As described above, according to the present invention, since the device can be manufactured without providing a device such as a glue or a heat seal for fixing the bottom seal flap, the cost can be reduced accordingly. Incidentally, when it is necessary to supplement the shape retention of the seal flap by the method of the present invention,
Depending on the situation, the conventional glue or heat seal may be weakened and used together. Further, in the embodiment, a rectangular parallelepiped paper container referred to as a so-called brick is described as an example. A prismatic paper container having a rectangular top and bottom surface and an octagonal body, called prisma. Alternatively, a wedge-shaped paper container in which the bottom surface called a wedge is square and the top is a horizontal line seal. It is applicable to paper containers of various shapes and does not exclude them from the present invention.

[0027]

As described above, according to the first aspect of the present invention, in the paper container, two sides of the bottom surface in contact with the other side surface are defined based on the two sides in which the bottom surface of the paper container contacts the front and rear surfaces. A beverage container or the like characterized in that it is possible to provide a paper container which does not need to be fixed to the bottom part by lifting a bottom surface sealing flap which is bent to the bottom surface when forming the paper container by lifting up to the inner side of the paper container and forming a concave surface. Since it is a paper container, it can be easily lifted without damaging a finger when lifting the bottom seal flap to flatten and dispose of the paper container. According to a second aspect of the present invention, there is provided the paper container for beverage or the like according to the first aspect, wherein the bottom surface is lifted toward the inner surface of the paper container and folded into the both side surfaces on a paper web so as to be easily formed into a concave surface. Since the paper container is a paper container for beverages or the like, in which the wires are arranged in advance, a desired shape can be easily formed when the paper web is bent to form a container shape. There is also an advantage that it can be easily realized at low cost.

[0028]

[Brief description of the drawings]

FIG. 1 is an external view showing a state of a paper container according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the paper container according to the embodiment of the present invention, and is a perspective view of the bottom seal flap seen from below the paper container main body.

FIG. 3 is a plan view showing a folding line formed on a web-shaped paper packaging material at a stage before a paper container according to an embodiment of the present invention is formed.

FIG. 4 is a schematic view of a filling machine for forming a paper container according to the embodiment of the present invention.

FIG. 5 is a schematic view of a main part of a filling machine for forming a paper container according to the embodiment of the present invention.

FIG. 6 is a plan view showing a folding line formed on a web-shaped paper packaging material at a stage before a conventional paper container is formed.

FIG. 7 is an explanatory view of a conventional paper container, and is a perspective view of a bottom seal flap seen from below a paper container main body.

FIG. 8 is a plan view and a sectional view showing a state in which the used paper container is flattened to facilitate recycling.

[0029]

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Packaging material 12 Reel 13 Filling pipe 14 Prototype container 15 Paper container 16 Side surface 17 Bottom surface 20 Bottom seal flap 21 Upper seal flap S1 Horizontal seal part m2 Fold line of bottom seal flap (embodiment of the present invention) m3 Bottom seal flap Fold line (conventional form) m1 fold line of upper seal flap m11-14 Vertical line fold SF1 Top end fixing portion of top sill flap SF1 Top end fixing portion of bottom sill flap

[0030]

Claims (2)

[Claims] 1. A web-shaped packaging material is formed into a tube, filled with an inner solution, and both ends of the tube are sealed with a horizontal line seal and cut, and both ends of the horizontal line seal are bent to form a bottom surface. In the paper container, the other two sides of which the bottom surface of the paper container is in contact with the side surface of the paper container are lifted toward the inner surface side of the paper container with reference to the two sides whose bottom surface is in contact with the front and rear surfaces of the paper container. A paper container for beverages or the like, characterized in that the bottom seal flap is bent so as to make concave contact with the bottom surface at the same time as making the bottom surface concave, but the bottom of the concave surface and the bottom seal flap are not fixed. 2. The paper container for beverages or the like according to claim 1, wherein the bottom surface of the paper container is lifted toward the inner surface of the paper container so that the bottom surface of the paper container can be easily formed into a concave shape. A paper container for beverages or the like, wherein the paper container is disposed in advance in the web-like packaging material.