JPH04142246A - Air tight container blank and its forming method - Google Patents

Abstract

PURPOSE:To obtain a container economical in material, good in operational efficiency, high in joint rigidity and good in appearance by a method wherein a peeling-off part of a planar body capable of receiving a bonding area between one side edge and the planar body is formed, a seal piece is heat sealed to the end part of the planar body at the place of a bonding area and the bonding area is attached to the inner end part of a plate body at the place of the peeling-off. CONSTITUTION:The edge of a right side wall 7 is provided with a bonding area 15 along a reinforcing piece remaining unattached thereto and the edge of the facing rear side wall 9 is provided with a planar body 3 with its unattached peeling-off part 16 lying along an upper outer flap 13a. Both ends of the planar body 3, i.e., a seal piece 20 and its opposite end part 23 are sealed together by forming a hutt seal joint between heat sealable films 5 using a heat sealing means. The bonding area 15 is then inserted into the peeling-off part 16 and attached to the edge of the rear side wall 9 to make up a square container.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an airtight assembly container whose main material is a plate such as corrugated cardboard or paperboard, and which prevents liquid leakage by a planar inner lining, and a method for manufacturing the same. .

[Conventional example]

When a box is assembled from plates such as cardboard, not only is the material not water resistant, but it is also inevitable that liquid will leak from the assembled structure. The plate was lined with an airtight planar body, and the planar body was completely sealed to ensure airtightness to prevent liquid leakage.

Conventionally, in this type of airtight assembly container, a sheet of paper laminated with a heat-sealable film that is easy to seal by heat sealing is used for the sheet body, and the edges of the sheet body are wrapped around the mold of the plate body. A seal piece was formed by letting the box come out, and the seal pieces were glued together to create a complete seal.Since the plate was covered with a planar material on its entire surface, the first assembly form of the box was to make the plate into a corner. To assemble into a cylindrical shape, first
As shown in Figure 6, stopper allowances 32 and 33 are provided on both ends of the plate body 2, and after heat-sealing the page seal pieces 34 and 35 from which the sheet body 3 protrudes, the stopper allowances are removed. Seal pieces 34 and 35 were attached to 32 and 33 with adhesive, respectively.

This allows the cardboard box to be assembled into a rectangular tube shape.
The next step is to close the bottom and lid, but since the planar body is a perfect rectangular cylinder, the flap cannot be closed as is. However, in this regard, the inventors succeeded in folding the inner flap into an isosceles triangle without being obstructed by the planar body (Patent Application No. 2-48
No. 017).

In addition, as shown in FIG.
By closing and heat-sealing the two seal pieces 37 and 37 that come together, the entire sheet body 3 could be completely sealed.

[Problem to be solved by the invention]

According to the above-mentioned assembly of the corrugated box, when connecting both ends of the plate, retaining margins 32 and 33 are provided in succession at both ends, and the sealing side of the sheet body of this retaining margin remains as it is together with the retaining margin. The methods used include gluing the seal edges to the outside, or folding the sheet into a double or multi-fold structure and folding it into the inner surface.

In this way, since the seal pieces 32 and 33 were placed over each stopper, the overlapping of the stopper and seal pieces created an excessive bulge on the inside corner of the box, which not only looked bad, but also The inside becomes narrower, albeit slightly, and more cardboard and planar materials are required due to the multiple layers, which increases costs.Despite this, the connection strength is weak, and furthermore, it requires a lot of work, which makes the work more difficult. In addition, on the bottom and lid, the seal pieces 37. 37 are glued on the outside and exposed, so the boxes collide with each other and pinholes are formed. There was also the problem of poor appearance.

On the other hand, regarding the seal side of the sheet body on the flap surface, given the shape of the box, after the seal side was sealed, the seal side was folded down and glued or taped, but when the box was placed down, Pebbles and foreign objects sometimes caused pinholes to form on the seal side, or the seal side tore. Further, when applying the tape, there were problems such as the sticker side getting in the way, making it difficult to apply the tape, and reducing the strength of the tape.

In view of the above-mentioned circumstances, it is an object of the present invention to provide an airtight assembly container that can save materials, has good workability, has strong connection strength, and has a good appearance, and a method for manufacturing the same. The purpose was

[Means and Operations for Solving the Problems] The structure and operations of the present invention to achieve the above objects are as follows.

1) Regarding airtight assembled containers, in airtight assembled containers in which a plate as the main material of the container is lined with an airtight planar body made of heat-sealed film or sheet, when connecting both ends of the plate, A stop margin is provided only at one end,
A seal piece from which a planar body protrudes is provided at the other end, and
At the other side end, a peeling part of the sheet body is formed in which a stop margin can be inserted between the sheet body, and the seal piece is heat-sealed to the end of the sheet body at the stop margin location, and the stop margin is removed. It is glued to the inside of the end of the plate at the peeled part.

Since the airtight assembled container is constructed as described above, the plate body is provided with a retaining allowance only at one end, and there is no need to provide a seal piece protruding from that end, and a seal piece is provided only at the other end. Because it only needs to be installed protrudingly, one piece of retaining allowance and one piece of sealing piece are omitted compared to conventional ones, which saves material and also prevents excessive bulges from forming on the inside of the connecting angle due to multiple connections. , which is advantageous for filling the contents.

2) Regarding the manufacturing method of airtight prefabricated containers, when assembling an airtight prefabricated container by lining a plate as the main material of the container with an airtight planar body made of heat-sealed film or sheet, both sides of the plate are When connecting the ends, a stopper is provided protruding only on one end, and the sheet is not bonded to the stopper, and a seal piece with the sheet protruding is provided on the other end. In addition, a peel-off part of the sheet body is formed at the other side end portion, in which a stopper can be inserted between the sheet and the sheet body, and the sealing piece is heat-sealed to the end of the sheet body at the stopper portion. , the retaining margin is adhered to the inner side of the end of the plate at the peeling part.

Since the manufacturing method of the airtight assembled container is configured as described above, it has the same effect as described above, and since the sheet body is not bonded to the retaining margin, the sealing piece can be attached to the sheet body at that location. When heat-sealing, it is easy to heat-seal completely by aligning both of them in a bow shape and heating them from both sides, and furthermore, the workability is good and the seal is perfect.

In addition, in the lid part, by closing the flap, the opposing seal pieces are glued together in a pattern, and then inserted into the peeling part inside the tip of the flap, so the seal piece is hidden under the flap. The image will not be visible and the appearance will be good.

In addition to ordinary paper and paperboard, there are also corrugated cardboard structures. It also includes paperboard or cardboard laminated with a film.

Examples of corrugated cardboard structures include single-sided corrugated cardboard, double-sided corrugated cardboard, double-sided corrugated cardboard, and double-sided corrugated cardboard.

In addition, as sheet materials, films, sheets, liner base paper,
Metal foils, etc. can be used, either alone or laminated with one or more of resin (extrusion), film, functional film, resin sheet, metal foil, metal foil + film, composite functional film, etc. on paper. can also be used.

The films constituting the planar body include general films (PE, P-P, polyester cellophane, nylon, etc.), so-called functional films, films on which metal is vapor-deposited, or films on which metal is vapor-deposited. Examples include films laminated with foil and films composited with resin films to improve gas barrier properties.

Examples of the functional resin film include the following.

a) 1 process length non-waterproof A far-infrared film, water-absorbing film, silver zeolite-containing film, ethylene adsorption film, dew-proof film, gas/water vapor barrier film, antibacterial film, etc.b) Other films Rust-preventing film, Fragrance film, deodorizing film, aluminum vapor deposited film, gas adsorption film, moisture absorption film (dry film), anti-fog film, conductive film, foamed film, etc. C) Composite of the above a) and b) films d) Functional film Examples of functional sheets include the following:

a) New! ``Shinjioka Foamed Resin Sheet 5 Foamed Resin Sheet + Aluminum Deposited Film, Aerated Resin Sheet (Air Cap Sheet), Aerated Resin Sheet + Aluminum Deposited Film, etc. b) Resin cloth, flat yarn, etc. C) Functional film and Composite with Functional Sheet (Example) Next, an example of the present invention will be described based on the drawings.

Figures 1 to 9 show one embodiment, and the airtight assembled container P uses cardboard as the main plate 2, and the sheet body 3 as shown in Figure 9. , kraft paper 4 laminated with polyethylene heat-sealed sheet 5 is used.

As shown in FIG. 1, the plate 2 has internal isosceles triangular flaps 10a, 10b, and 11 at the top and bottom of the left and right side walls 6.7.
a, llb are arranged in series, and square outer flaps 12a, 12b, 13a, 13b are arranged in series on the upper and lower sides of the front and rear side walls 8.9,
Upward flaps 10a, lla and upward flaps 12a, 1
A reinforcing piece 14 is interposed between it and 3a.

In assembling the cardboard box, the present invention is implemented in connecting the end side walls 7.9 and closing the top lid for assembling the box into a rectangular cylinder.

The planar body 3 is formed into a rectangular shape wider than the plate body 2, and is adhered to the plate body 2 at the paper 4 portion, with the end on the rear side wall 9 side and both upper and lower ends protruding. The end is a seal piece 20.
21.22. However, it is bonded to the plate body 2 only at the portion indicated by the diagonal line between - dots and dashes.

That is, the planar body 3 is not entirely adhered to the plate body 2, and there is a retaining margin 15 at the side end of the right side wall 7, which is attached to the reinforcing piece 4.
However, the retaining margin 15 is not bonded, and a peeling portion 16 to which the planar body 3 is not bonded is provided at the end of the rear wall 9 that is brought into contact with the retaining margin 15, spanning the rising flap 13a. be. A peeling portion 17 is also provided at the upper end of the rising flaps 12a, 13a.

Further, among the lower flaps 10b, llb, 12b, and 13b, only the triangular inner flaps 10b and llb are bonded, and the outer flaps 12b and 13b are not bonded.

In addition, in FIG. 1, the width of the planar body of the conventional product is indicated by a chain double-dashed line.

Next, a procedure for assembling this airtight container P will be explained.

First, both end portions of the planar body 3, that is, the seal piece 20 and the opposite end portion 23 are bonded together with the heat-welding film 5.5. Since heat sealing means is used for this bonding, the opposite end 23 is left unbonded as described above due to heat conduction.

Since sealing on the side surface has been completed by adhering both ends of the planar body 3, next, as shown in FIG.
Glue it to the end of the tube to complete the assembly of the rectangular cylinder (Figure 3).

In order to align the corners of this connecting part, for example, the width of the stopper 15 should be 41 mm, and the width of the peeling part 16 should be 51 mm.

The width of the peeled portion 16 is made somewhat wider.

Next, as shown in Figure 2, the bottom is closed, the contents are filled, and the lid is closed.

When closing the lid, flaps 10a, lla, 12a
, 13a, the opposing seal pieces 2
1.Heat seal while matching 21 (Figure 7).

In this state, as shown in the figure, the seal pieces 21, 21
Although the outer flaps 12a and 13 protrude outward,
Since the tip of a is peeled off from the planar body 3, the seal pieces 21 and 21 are inserted into one of the peeled parts 17.

Regarding how to close the bottom, please use the outer flaps 12b and 13.
Since the sheet body 3 is separated from b and is in a free state, the seal pieces 22 and 22 are closed while closing the inner flaps 10b and llb.
The sealing piece 2 is heat-sealed as shown in FIG.
2. Place the 22 inside and close the outer flaps 12b and 13b.

Note that 29 is a ruled line for folding the flap in the open state.

[Other Examples]

FIGS. 10 to 15 each show other embodiments.

In the case shown in FIG. 10, reinforcing pieces 14 and 14 are provided on both sides of the upper part of the inner flaps 10a and lla, so that
Extraction holes 28.28 are made on both sides of the lower part.

In the embodiment shown in FIG. 11, both end faces are not bonded in the developed view, and the end faces of both length flaps are also not bonded. In the case of length flaps, this embodiment is the same even if at least one of the length flaps is not bonded. The features of this embodiment are as follows: (1) Since the formal part of the corrugated cardboard structure is not bonded, it is possible to heat-seal the formal part to the opposite planar body by bending the formal part upward.

Furthermore, since the end face of the corrugated cardboard structure on the opposite side of the formal part is not bonded, it is possible to store the sealed side in the non-bonded part of the end face after heat sealing.

■Since the end faces of both length flaps are not glued, it is possible to fold the short flap inward and store the seal side protruding from the corrugated cardboard structure into the length flap face that is not glued. In this case, since the end faces of both length flaps are not glued together, both seal sides go down when stored, making it easy to store.

Furthermore, even if only one end face of the length flap is not bonded, the functionality remains the same.

FIG. 12 shows an embodiment in which vertical ruled lines are added to the width flap surface of the structure of the embodiment shown in FIG. 11 above.

This feature, in addition to the above features ① and ②, allows the width flap surface to be folded inward or outward.
The case can be folded even if at least one of the upper and lower sides is sealed in advance. Therefore, it is possible to pre-seal at the factory and pack 8 loads.
Workability on site can be improved.

In the example shown in FIG. 13, a cylindrical or bag-shaped planar body is pasted onto the corrugated cardboard structure shown in FIG. 12 above.

In this case, since the planar body is cylindrical or bag-shaped, the end surfaces of the planar body are sealed in advance. Therefore, adhesion of the formal part and the end face of the corrugated cardboard structure on the opposite side of the formal part is irrelevant. The advantage of this is that the above item (2) can be used as is.

FIG. 14 shows an embodiment in which a part of the width flap corner of the corrugated cardboard structure is left in the structure shown in FIG. 11, and the triangular top surface is cut off. In this case, it may be cut out into a perfect triangular shape.

In addition to the above-mentioned features (1) and (2), the feature of this embodiment is that the upper surface of the corrugated cardboard structure is cut out in a triangular shape, leaving the width flap corners, so that it can be folded easily during assembly. Furthermore, since a portion of the width flap corner is left, the long flap and the width flap are integrated, making it easier to mold.

Fig. 15 shows a corrugated cardboard structure in which the upper flap has the structure shown in Fig. 14 above, the lower flap has a cut structure, and the width flap has upper and lower ruled lines, making it foldable. This is an example in which a cylindrical or bag-shaped sheet body is pasted to this corrugated cardboard structure.

The feature of this embodiment is that the bottom flap surface can be sealed in advance, and the molding of the bottom flap, especially the corrugated cardboard structure itself, does not have triangular ruled lines, but has a cut shape similar to that of type A. Since the planar bodies are glued together in a triangular shape, it can be easily assembled and molded with one touch. (In this case, due to the structure of the box, it is necessary to make sure that the length flaps are not glued on the entire surface.) Furthermore, the lid flap surface has the same features as explained in the embodiment shown in Fig. 14 above. Since the sheet body is cylindrical or bag-shaped, the end face of the sheet body is sealed in advance. Therefore, adhesion between the formal part of the corrugated cardboard structure and the end surface on the opposite side of the formal part is irrelevant. In addition, the above feature (■) can be utilized as is.

〔Effect of the invention〕

As explained above, according to the airtight assembled container of the present invention, a stopper is provided only at one end of the plate, and a sealing piece with a planar body protruding from the other end is provided, In addition, a peeling part of the sheet body is formed at the other side end portion, and a peeling part of the sheet body is formed in which a stop margin can be inserted between the sheet body, and the sealing piece is heat-sealed to the end of the sheet body at the stop margin portion, and the sheet body is stopped. Since the margin is adhered to the inner side of the end of the plate at the peeling part, one piece of retaining margin and one piece of sealing piece are omitted compared to the conventional one, and the material can be saved accordingly and it can be provided at a low cost. In addition, an excessively large swollen part is not generated on the inside of the connecting corner due to multiple overlaps, which is advantageous for filling the contents, and since the retaining allowance is bonded to the other end of the plate without intervening the planar body, It has excellent effects such as good assembly workability, high connection strength, and stable assembly.

Further, according to the method of manufacturing an airtight assembled container of the present invention, not only the above-mentioned effects are achieved, but also the sheet material is not bonded to the retaining margin, so it is easy to heat-seal the sealing piece.
It has the excellent effect of further improving workability.

In addition, in the lid part, if the seal pieces that are glued together are inserted into the peeling part inside the flap tip,
The seal piece hides under the flap and is no longer visible, giving it a good appearance. It also makes it easier to close the lid. Furthermore, by using a functional resin film or sheet for the one-sided body, the product is easy to maintain. There are effects such as making transportation and storage advantageous.

[Brief explanation of the drawing]

Figures 1 to 9 show one embodiment, Figure 1 is a developed view, Figure 2 is an assembled perspective view before closing the lid, and Figure 3 is Figure 2A.
- An enlarged sectional view in the Ag arrow direction, Figure 4 is a sectional view showing the assembly work procedure, Figure 5 is a perspective view showing the fully assembled state, and Figure 6 is a perspective view showing the fully assembled state.
The figure is an enlarged cross-sectional view of the lid section as viewed from the line B-B in FIG. 5, FIG. 7 is a new view showing the lid closing procedure, and FIG. FIG. 9 is an enlarged sectional view of the bottom portion, and FIG. 9 is an enlarged sectional view of the planar body. 10 to 15 are partially exploded views showing other embodiments, respectively. FIGS. 16 and 17 are sectional views corresponding to FIGS. 3 and 6, respectively, showing a conventional example. P... Airtight assembly container 2... Plate body 3... Planar body S... Heat welding sheets 12a, 13a... Outer flap 15... Stopping allowance 16.17... Peeling part 20.21... Seal piece 23... End of planar body

Claims (1)

[Scope of Claims] 1) An airtight assembled container in which a sealing edge of a planar body is housed in at least one flap surface of a stopper portion and/or upper and lower flaps of a corrugated cardboard structure. 2) In an airtight assembled container in which a plate as the main material of the container is lined with an airtight planar body made of heat-welded film or sheet, a stopper allowance is required only at one end when connecting both ends of the plate. , a seal piece from which the sheet body protrudes is provided at the other end, and a peeling part of the sheet body into which a stopper can be inserted between the sheet body and the sheet body is provided at the other end. an airtight assembly container, characterized in that the sealing piece is heat-sealed to the end of the sheet body at the stop margin, and the stop margin is adhered to the inner side of the end of the plate body at the peeling portion. 3) When assembling an airtight assembly container by lining a plate as the main material of the container with an airtight planar body made of heat-sealed film or sheet, one side edge of the plate is connected to both sides of the plate. A stopper is provided protruding only on the stopper, and the sheet is not bonded to the stopper, a seal piece with the sheet protruding is provided on the other end, and a seal is provided on the other end. A peeling part of the sheet body into which a retaining margin can be inserted is formed between the sheet body, the sealing piece is heat-sealed to the end of the sheet body at the retaining margin location, and the retaining margin is inserted into the sheet body at the peeling portion. A method for manufacturing an airtight assembled container, characterized by bonding the inside of the end portion. 4) The airtight assembled container according to claims 2 and 3, wherein the heat-welded film or sheet is a functional resin film or a functional resin sheet. 5) In the lid part, a sheet body is protruded from the flap to form a sealing piece, a peeling part of the sheet body is formed at the tip of at least one of both outer flaps, and the flap is closed. 3. The method of manufacturing an airtight assembled container according to claim 2, wherein the opposing seal pieces are adhered in a cross-shaped pattern and then inserted into the peeling part inside the tip of the flap.