JPH0858767A - Roof-shaped liquid container - Google Patents

Abstract

PURPOSE: To reliably seal a container to extend a preservation period of liquid inside. CONSTITUTION: A roof-shaped liquid container comprises a ceiling face 125 with coating material 13, 13 applied and ceiling faces 123, 127 with coating agent 21, 21 applied in order tg make opening of the container easy. The coating material 13, 13 is applied except to a part 15 near a fold 213 for folding a ceiling part on the ceiling face 125. An upper end side of a ceiling face 129 equipped with a fold 219 for folding another ceiling part is formed into a protrusion so that the upper edge of the fold 219 is a vertex.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof type liquid container.

[0002]

2. Description of the Related Art Heretofore, a roof type liquid storage container made of paper for storing beverages therein has been developed and used.

FIG. 3 is a perspective view showing the shape of the upper portion of this type of roof type liquid storage container. As shown in the figure, this roof type liquid storage container has four side wall surfaces 103, 105, 10
Four roof surfaces 113, 115, 11 on 7,109
7 and 119 are provided, and a sealing portion 121 is further provided thereon.
Is provided.

Then, the two roof surfaces 113 and 117 are folded around the bending line 131 (see FIG. 3), and the sealing portion 121 on the roof surface is peeled off and expanded to the state shown in FIG. As shown, the two peeled sealing portions 121 are further peeled off to form the opening 130.
Open and the liquid inside is poured out through the opening 130.

By the way, the opening 1 of the sealing portion 121
In order to facilitate the opening operation of 30, the sealing part 1
A coating material is applied to the inner surfaces a, b, c, d of 21 (see FIG. 5) for facilitating the peeling.

FIG. 6 is a plan view of relevant parts showing an upper portion of a conventional container sheet 201 used for assembling the roof type liquid storage container shown in FIG. The container sheet 201 is formed by forming polyethylene layers on both sides of the sheet.

The container sheet 201 is provided with four side wall forming folds 203 extending in the vertical direction, a roof forming fold 205 extending in the horizontal direction, and a sealing part forming fold 207. Wall 103,1
05,107,109 and one overlapping surface 110
And four roof surfaces 113, 115, 117, 119 and four sealing surfaces 123, 125, 127, 129 are formed, and two roof folds 209, 211 are provided on each of the two roof surfaces 115, 119. Further, the two folding surfaces 125, 129 are provided with folding folds 215, 219 for folding the sealing portion extending in the vertical direction. The upper end sides of the sealing surfaces 123 and 127 are formed higher than the upper end sides of the sealing surfaces 125 and 129.

The sealing surface 125, which is an opening, is
A coating material 240 made of a material that can be heat-sealed and that can be easily peeled off is applied, and the sealing surfaces 123 and 127 facing the coating material 240.
The same coating materials 241 and 241 are also applied on the top.

Then, the four side wall forming folds 203 are bent, and the overlapping surface 110 is heat-welded to the side wall surface 103 (performed by the polyethylene layers) to form a square tube shape, and then the roof portion forming fold 205. And folds 207 for forming a sealing portion and folds 209, 21 for roof folding
1 and the folding folds 215 and 219 for folding the sealing portion at the same time as shown in FIG. 7, and heating and pressurizing the respective overlapping sealing surfaces 123, 125, 127 and 129 in the direction of arrow A to heat-bond each other, Seal it.

Here, FIG. 8A is a partially cutaway side view showing the structure of the upper part of the roof type liquid storage container formed by assembling the container paper 201. This drawing is a view of the roof type liquid storage container as seen from the direction of arrow a shown in FIG. Further, FIG. 8 (b) is shown in FIG. 8 (a).
It is a bb section arrow line view of.

As shown in FIG. 1A, two sealing surfaces 125 and 129 folded toward the inside of the container.
Due to its geometrical structure, the upper end side of is inclined so as to gently descend toward the folds 215 and 219 for folding the sealing portion at the tip thereof. The upper end corners of the facing folding folds 215 and 219 are in contact with each other at a point e.

[0012] Then, what is heated and pressed for sealing is the overlapping sealing surfaces 123, 125, 1
27 and 129 as a whole, and the whole portion c shown by hatching in FIG.

At this time, as shown in FIG. 3B, the inner doubly-folded sealing surface 129 (125).
Is in a state of being sandwiched by the outer sealing surfaces 123 and 127 having a high height.

[0014]

By the way, as shown in FIG. 8B, when the inner sealing surfaces 125 and 129 are sandwiched by the outer sealing surfaces 123 and 127, the inner sealing surface 125 is sandwiched between them. , 129, a gap d corresponding to the thickness of 129 is generated. This gap d means that an air passage is formed in the dotted line d portion shown in FIG.

On the other hand, the inner sealing surfaces 125 and 129 are bonded to each other at the point e where they abut. However, since the coating material 240 is applied to the sealing surface 125 side of this portion e, the coating material 240 and the sealing surface 129 are heat-welded between the polyethylene layers, and the bonding cannot be reliably performed due to the difference in material. There were cases.

The inner sealing surfaces 125 and 129 are adhered to each other by the fold 21 for folding the sealing portions of the two.
It is carried out at one point e, which is the contact point between the upper corners of 5, 219. Therefore, the folds 215, for folding the sealing portion,
If any one of the upper end corners of 219 is vertically displaced, the two do not come into contact with each other, and from this point as well, the adhesion at the point e may not be surely performed.

If the bonding at the point e cannot be reliably performed, an air passage will be formed between the outside air and the inside of the container through the gap d and the point e. Since this passage is usually fine, the liquid inside does not flow out, but various bacteria may enter along with the air, so there was a problem that the storage period of the liquid inside could not be extended too much. .

The present invention has been made in view of the above points, and an object of the present invention is to provide a roof type liquid container capable of reliably sealing and extending the storage period of the liquid inside.

[0019]

In order to solve the above-mentioned problems, the present invention forms four side wall forming folds extending in the vertical direction on a container sheet which is wholly or partially covered with a synthetic resin material. Thus, four side wall surfaces and one overlap surface are provided, and four roof surfaces are provided in the vicinity of the upper portion by forming a roof portion forming fold line directed in the lateral direction, and further further directed in the lateral direction. By providing creases for forming a sealing portion, four sealing surfaces are provided, and two of the four roof surfaces which are not adjacent to each other are provided.
Two roof folds are provided on each of the two roof surfaces from the lower end corners of the roof surface toward the center of the upper end, and the ceiling surface is vertically sealed at the center of the sealing surface on which the roof folds are provided. A fold line for folding the part is provided, and one of the sealing faces provided with the fold line for folding the sealing part and the sealing faces on both sides of the sealing face are heat-fused and easily peeled off from each other. The coating material is applied and the side wall forming folds are bent to form a rectangular tubular container, and the roof forming folds, sealing part forming folds, roof folds and sealing part folds are folded. To form the roof part by overlapping the sealing surfaces on top of each other, In roof liquid container structure sealed I combined sealing surface made to thermal fusion, the coating material was set to be applied to the portion except for the sealing portion of the interfolding crease of at least the sealing surface.

Further, according to the present invention, the upper end side of any one of the sealing surfaces provided with the folding folds for the sealing portion is formed into a convex shape so that the upper end of the folding fold for the sealing portion becomes the apex. It was decided to form.

[0021]

[Function] Since the coating material is applied to the portion of the sealing surface excluding the portion for folding the sealing portion, the synthetic resin material is exposed at the upper end corners of the folding portion for folding the sealing portion without applying the coating material. To do. The surface of the other fold for folding the sealing portion is also made of a synthetic resin material. In other words, both are made of the same synthetic resin material and have a high adhesive strength, so that they can be reliably bonded at the contact point, and the inside of the container can be reliably sealed.

Further, since the upper end side of any one of the sealing surfaces provided with the folding folds for the sealing portion is formed in a convex shape so that the upper end of the folding fold for the sealing portion becomes the apex. Even if the positions of the folded folds for folding both sealing parts are slightly shifted up and down, the upper edge of the folds for folding the sealing part on the side that does not form a convex shape is the side of the fold for folding the sealing part on the side that is convex. Abut any part of. Therefore, the two can be brought into contact with each other easily and reliably, and the inside of the container can be reliably sealed.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view of relevant parts showing an upper portion of a container sheet 11 for a roof type liquid storage container of the present invention. The same parts as those in the conventional example shown in FIG. 6 are designated by the same reference numerals.

The container paper 11 is formed by forming a polyethylene layer on both sides of the paper (in some cases, an aluminum layer is provided between the paper and the polyethylene layer).

Then, in the container sheet 11, as in the conventional example shown in FIG. 6, four side wall forming folds 203 extending in the vertical direction are formed to form four side wall surfaces 10.
3, 105, 107, 109 and one overlapping surface 110 are provided, and four roof surfaces 113, 115, 117, 119 are provided by forming a roof portion forming fold line 205 that extends in the lateral direction on the upper portion thereof. Further, a fold line 207 for forming a sealing portion extending in the lateral direction is further provided on the four fold lines 123, 125, 125,
127, 129 are provided, and two roof folds 209, 211 for roof folding are provided on two roof surfaces 115, 119 that are not adjacent to each other, from the lower corners of the roof surfaces 115, 119 toward the center of the upper end. The roof folds 209 and 211 are provided on the roof surfaces 115 and 119, and the ceiling folds 215 and 219 are provided in the center of the ceiling surfaces 125 and 129.

In the present invention, the sealing material 125, which is an opening, is coated with the coating materials 13 and 13 made of a material that can be heat-sealed and that can be easily peeled off. , 13 are not applied to the portion 15 around the fold line 215 for folding the sealing portion. That is, the coating materials 13 and 13 are divided into two with the sealing part folding fold 215 sandwiched therebetween, and the polyethylene layer of the container sheet 11 is exposed at the portion 15 around the sealing part folding fold 215.

Further, the coating materials 21 and 21 having the same shape and size are applied also on the sealing surfaces 123 and 127 facing the coating materials 13 and 13.

On the other hand, the upper end side of the sealing surface 129 is formed in a convex shape so that the upper end of the fold fold 219 for folding the sealing portion becomes the apex.

Bending lines 131 and 131 are provided on the roof surfaces 113 and 117, respectively.

Then, as in the conventional example, the four side wall forming folds 203 are bent to form the overlapping surface 1 thereof.
10 is heat-welded to the side wall surface 103 (performed by the polyethylene layer) to form a square tube shape, and then a fold 205 for forming a roof portion.
And folds 207 for forming a sealing portion, folds 209, 211 for roof folding, and folds 2 for folding a sealing portion 2
The roof type liquid paper container is completed by bending 15 and 219 at the same time, heating and pressing the stacked sealing surfaces 123, 125, 127 and 129 to heat-seal each other and sealing.

FIG. 2 is a partially cutaway side view showing the structure of the upper part of the roof type liquid storage container formed by assembling the above-mentioned container paper 11 and showing a part of the front sealing surface 123 and the roof surface 113. Is cut out to show the inside.

As described above, the sealing surface 125 folded toward the inside of the container inclines so as to gently descend toward the folding fold 215 for the sealing portion, while the other sealing surface 129 has its upper end. Since the side is formed in a convex shape, the upper end side is substantially horizontal. Therefore, the upper end corner portion of the folding fold 215 for the sealing portion comes into contact with the side of the folding fold 219 for the sealing portion (point e).

The fold 2 for folding the sealing portion
The upper end corner portion of 15 is a portion 15 where the polyethylene layer not coated with the coating material 13 is exposed, and the surface of the fold line 219 for folding the sealing portion is also a polyethylene layer. In other words, since they are the same material and have strong adhesive strength, they can be reliably bonded at the point e, and the inside of the container can be reliably sealed.

Both of the sealing surfaces 125, 1 which are folded in again
Even if the position of 29 is slightly shifted up or down, the upper edge corner of the folding fold 215 for sealing part abuts on any part of the side of the folding fold 219 for sealing part, so that contact between them is easy and reliable. Therefore, from this point as well, the inside of the container can be reliably sealed.

Further, in the present invention, the sealing surface 1
The air passage d1 on the 25 side does not intersect with the air passage d2 on the sealing surface 129 side. Therefore, also from this point, the outside air is less likely to enter the inside of the container, and the inside of the container can be sealed.

Instead of projecting the upper edge of the sealing surface 129 in a convex shape, the upper edge of the other sealing surface 125 may be projected in a convex shape.

[0037]

As described in detail above, the roof type liquid container according to the present invention has the following excellent effects. Since no coating material is applied to the folding folds of the sealing portion, the surfaces of the two folding folds of the sealing portion can be made of the same material and made of a synthetic resin material having high adhesive strength, so that the two can be reliably bonded. It is possible to reliably seal the inside of the container. Therefore, air and miscellaneous bacteria do not enter the inside of the container, and the storage period of the internal liquid can be made longer than before.

Since the upper end side of one of the sealing surfaces provided with the folding folds for the sealing portion is formed in a convex shape, both folding folds for the sealing portion surely come into contact with each other, and from this point as well, the inside of the container is surely secured. It can be hermetically sealed and the internal liquid can be stored for a longer period than before.

[Brief description of drawings]

FIG. 1 is a container paper 11 for a roof type liquid storage container of the present invention.
FIG. 4 is a plan view of a main part showing an upper part of the.

FIG. 2 is a partially cutaway side view showing a structure of an upper part of a roof type liquid storage container formed by assembling container paper 11.

FIG. 3 is a perspective view showing an upper portion of a roof type liquid storage container.

FIG. 4 is a perspective view showing a method for opening the roof type liquid storage container.

FIG. 5 is a perspective view showing a method for opening the roof type liquid storage container.

FIG. 6 is a container sheet 201 for a conventional roof type liquid storage container.
FIG. 4 is a plan view of a main part showing an upper part of the.

FIG. 7 is a perspective view showing a method of assembling the roof type liquid storage container.

8A is a partially cutaway side view showing a structure of an upper part of a roof type liquid storage container formed by assembling container paper 201, and FIG. 8B is a side view of FIG. 8A. It is a bb cross-section arrow line view.

[Explanation of symbols]

 11 Container Paper 13, 13 Coating Material 103, 105, 107, 109 Side Wall Surface 110 Overlap Surface 113, 115, 117, 119 Roof Surface 123, 125, 127, 129 Sealing Surface 203 Side Wall Forming Fold 205 Roof Forming Fold 207 Folds for forming sealing parts 209, 211 Folds for roof folding 215, 219 Folds for folding sealing part

Claims (2)

[Claims] 1. A container sheet, which is wholly or partially covered with a synthetic resin material, is provided with four side wall surfaces and one overlap surface by forming four side wall forming folds extending in the vertical direction. Further, four roof surfaces are provided by forming a roof portion forming fold line extending in the lateral direction in the vicinity of the upper portion thereof, and further four sealing surfaces are provided by providing a sealing portion forming fold line extending in the horizontal direction on the roof surface. Further, two roof folds extending from two corners of the lower end of the roof to the center of the upper end are provided on two non-adjacent roofs of the four roofs, and the folds for roof fold are provided. In the center of the sealing surface on the roof surface, a fold line for vertically folding the sealing part is provided, and one of the sealing surfaces provided with the fold line for folding the sealing part. The sealing surface and the sealing surfaces on both sides of the sealing surface are coated with a coating material made of a material that is easily heat-fused and easily peeled off, and a rectangular tubular container is formed by bending the side wall forming folds. Forming a roof part by folding the roof part forming fold, the sealing part forming fold, the roof folding fold and the sealing part folding fold, and the sealing surfaces are overlapped at the upper end thereof, In a roof-type liquid storage container having a structure in which a combined sealing surface is heat-sealed and hermetically sealed, the coating material is applied to at least a portion of the sealing surface excluding a fold for folding the sealing portion. A roof type liquid storage container. 2. A container sheet, which is wholly or partially covered with a synthetic resin material, is provided with four side wall surfaces and one overlapping surface by forming four side wall forming folds extending in the vertical direction. Further, four roof surfaces are provided by forming a roof portion forming fold line extending in the lateral direction in the vicinity of the upper portion thereof, and further four sealing surfaces are provided by providing a sealing portion forming fold line extending in the horizontal direction on the roof surface. Further, two roof folds extending from two corners of the lower end of the roof to the center of the upper end are provided on two non-adjacent roofs of the four roofs, and the folds for roof fold are provided. In the center of the sealing surface on the roof surface, a fold line for vertically folding the sealing part is provided, and one of the sealing surfaces provided with the fold line for folding the sealing part. The sealing surface and the sealing surfaces on both sides of the sealing surface are coated with a coating material made of a material that can be easily heat-sealed and peeled off, and a quadrangular cylindrical container is formed by bending the side wall forming folds. Forming a roof part by folding the roof part forming fold, the sealing part forming fold, the roof fold fold, and the sealing part fold fold, and the sealing surfaces are superposed on each other at the upper end of the fold. In a roof-type liquid storage container having a structure in which the combined sealing surfaces are heat-sealed and hermetically sealed, the upper end side of one of the sealing surfaces provided with the folds for folding the sealing portion is the sealing portion Characterized by being formed in a convex shape so that the upper end of the folding fold becomes the apex Roof-type liquid container to be.