JP2000335595A - Packaging bag with folding pleat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag with folding pleats in which respective left and right folding pleats can be folded accurately on original folding line positions at all times and folding pleats are so formed as not to be an obstacle when an article is to be filled and packaged in the bag. SOLUTION: A packaging bag with folding pleats is provided with folding pleats 40 formed of two folding pieces 41 and 42 facing inwardly and folded into the V-shape on respective side face materials 4, 4, left and right, and one folding piece out of respective folding pieces 41 and 42 of respective side face materials 4, 4 is bonded only with the vicinity of an opening of a front face material 2 or a rear face material 3, by which folding pleats 40 are formed not to be an obstacle in the vicinity of the opening, and the folding pleats 40 are securely folded on the sections of original folding lines 43 when the bag opening is closed after filling an article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folded foldable packaging bag having folds formed on left and right side members, respectively.

[0002]

2. Description of the Related Art Folded packaging bags have a large volume when inflated, and are convenient for storing a large number of articles. By the way, as this kind of folded packaging bag, for example, the one shown in FIG. 11 is known. The foldable packaging bag shown in FIG. 11 has a front member 2, a rear member 3, and right and left side members 4, 4.
The bottom member 5 is formed so that it can be formed into a square cylinder with a bottom. On each of the left and right side members 4, 4 are formed folds 40, 40 which are folded inward in a V-shape, respectively. The folds 40 and 40 are folded into a V shape at a fold line 43 at the center in the width direction.
Two fold pieces 41 and 42 are formed on both sides of the fold line 43. One end (upper end) of the packaging bag is an opening 6 for filling the article. As shown in FIG. 11, this type of folded wrapping bag is manufactured in a flat state in which each of the left and right folds 40, 40 is folded inward, and when the bag is filled with articles. Inflate as shown in FIG.

[0003] In order to fill the foldable packaging bag with articles, an automatic filling and packaging machine generally called a general packer is used. At this time, as shown in FIG. The rear surface material 3 is suctioned from the front and rear (AB direction) by a suction device to open the bag opening 6 largely, and a predetermined amount of the article Y is filled into the bag from the opened opening 6. After filling the bag with the article Y, the bag opening 6 is closed,
Subsequently, the edge of the bag opening 6 is sealed (for example, by heat sealing) to obtain a packaged product.

[0004]

By the way, in order to fill an article in a known folded foldable bag shown in FIG.
As shown in FIG. 2 and FIG. 13, the bag opening 6 is largely opened from the front and rear (AB direction). At this time, the folds 40 and 40 of the left and right side members 4 and 4 are extended, and especially the bag opening. In the vicinity of 6, there are cases where the two folded pieces 41 and 42 are extended until they become linear in plan view. In this case, the folding lines 43 of the folds of the side members 4 and 4 near the bag opening 6 disappear. In this state, after the bag is filled with a predetermined amount of the article Y, the bag opening 6 is closed and sealed. When the bag opening 6 is closed (the upper edge of the front material 2 and the rear material 3 are closed). When joining with the upper edge), each fold 40,
40 is the position of the original folding lines 43, 43 (reference numerals P,
(P position) may not be able to be folded properly. That is, in a state where the bag opening 6 is largely opened, FIGS.
Each fold 40, 40 near the bag opening 6 as shown in FIG.
When the bag opening 6 is closed from this state, the two side pieces 4, 4 rarely extend as shown by reference numeral 4 'in FIG. Inwardly, at the position deviated from the original folding line positions P, P (for example, the position of P '), the side members 4, 4 are folded outward as indicated by reference numeral 4 ", Alternatively, the side members 4 and 4 may be folded irregularly (for example, in a state in which wrinkles are generated), and the fold 40 is folded in the vicinity of the bag opening as shown in FIG. If the bag opening 6 is folded at the position P 'shifted from the line 43 in the sealing step, the bag opening 6 is sealed as it is (with the folded line position shifted), and in this case, the packaged product becomes a defective product. is there.

Further, in the above-mentioned folded bag with folds, when the bag opening 6 is not opened as shown in FIG.
In a state where the inwardly bent portion remains in the zero portion, there is a problem that the fold portion 40 becomes an obstacle when filling the article.

The present invention has been made in view of the above-mentioned problems of the conventional folded foldable packaging bag, and has been used for filling and wrapping articles in the bag.
An object of the present invention is to provide a foldable packaging bag in which each of the left and right folds can always be folded exactly at the original fold line position, and the fold portion does not interfere.

[0007]

The present invention has the following structure as means for solving the above-mentioned problems. The invention of claim 1 of the present application is directed to a folded wrapping bag having a cylindrical shape having a front material, a rear material, and left and right side materials and having folds formed on each side material. I have. In the present invention, the material, shape, size, and the like of the bag can be appropriately selected as long as the bag has folds (gussets) on both sides.

The fold of each side member is formed by folding two fold pieces inwardly into a V shape. The folds of the fold have the same width, and therefore a fold line of the fold is formed at the center in the width direction of the side member.

[0009] In the folding bag with folds according to the first aspect of the present invention, one of the folds on each side member is made to have a small depth near the opening of the bag with respect to the front member or the rear member. The width is glued. The bonding portion between the folded piece and the front or rear face material may have the entire width at a position near the upper end of the folded piece or may have a pinpoint shape at a position near the folding line of the fold.

As described above, in the packaging bag with folds according to the first aspect of the present invention, the position of one of the two folds of each fold near the bag opening is bonded to the front or rear surface material. Even if you open the bag opening to the maximum,
The center fold line of each fold remains bent or adhered or close to the front or back material. Therefore, the fold portion does not become an obstacle when filling the bag with the article, and the fold is reliably folded at the original fold line portion when the bag opening is closed after the article is filled. Become. According to the second aspect of the present invention, in the foldable packaging bag according to the first aspect, positions of the two folded pieces in each fold near the upper outer end are adhered to each other.

As described above, in the folded portion on each side, the position of one folded piece near the upper end is bonded to the front material or the rear material, and the position of the two folded pieces near the upper outer end is bonded to each other. When the bag is folded, the bag can be handled in the same manner as the bag without the fold when opening and closing the bag opening.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below with reference to FIGS. 1 to 10. FIGS. 1 to 5 show a first embodiment, and FIGS. An embodiment and FIGS. 9 to 10 show a folded packaging bag according to a third embodiment. The foldable packaging bag according to the first embodiment shown in FIGS. 1 to 5 corresponds to claims 1 and 2 of the present application.
Each of the foldable packaging bags according to the second embodiment of FIG. 8 to FIG. 8 and the third embodiment of FIG. 9 to FIG. 10 corresponds only to claim 1 of the present application. It should be noted that this type of folded foldable packaging bag has the advantage that the volume can be increased by inflating the inside of the bag and a large amount of articles can be stored.

First, the common configuration of each of the first to third embodiments will be described. In each of the embodiments, a self-standing, rectangular tube-shaped packaging bag is employed as a folded packaging bag.
That is, these folded packaging bags are composed of a front material 2 and a rear material 3.
And the left and right side members 4 and 4 and the bottom member 5 are formed into a bottomed cylindrical shape. In addition, as a material of the packaging bag, a synthetic resin film is mainly used, but the material is not particularly limited. The cylindrical body 1 composed of the front member 2, the rear member 3, and the left and right side members 4, 4 may be formed into a cylindrical shape by bonding side edges of different materials to each other by, for example, heat sealing. Alternatively, it may be formed into a cylindrical shape from a single film. Further, in another embodiment, a folded folding bag having a structure in which the lower edge of the front material 2 and the lower edge of the rear material 3 are directly joined without using the bottom material 5 is also applicable.

Each of the left and right side members 4, 4 has a fold 4
0, 40 are formed. Each fold 40 is formed by folding two fold pieces 41 and 42 inward in a V shape. The folds 41 and 42 of the fold 40 have the same width, so that a fold line 43 of the fold is formed at the center of the side member 4 in the width direction.

Next, individual embodiments will be described.
In the packaging bag with folds of the first embodiment, as shown in FIGS. 1 to 3, the position of each of the folds 40, 40 near the upper end of one of the folds 42, 42 is folded with respect to the rear surface material 3. Is bonded (bonded portion 7) by a small depth width L (FIG. 3) over substantially the entire width W (FIG. 2). The adhesive portions 7, 7 may be appropriately short of the entire width W of the fold 42, but in this case, it may be formed at a position near the fold line 43 of the fold 40. Although the bonding portion 7 is formed at the upper end position of the folded piece 42 in the illustrated example, it may be formed at a position slightly lower than the upper end position of the folded piece. The bonding portion 7
The width L is not particularly limited, but may be about 1 to 5 mm. When the article Y is filled in the bag as shown in FIG. I'm trying to get.

As a modification of the first embodiment, the bonding portion 7 may bond the respective folded pieces 41 to the front member 2. Also, each of the bonding portions 7, 7
In another embodiment, in the other embodiment, it may be only necessary to bond the one folded piece 42 (or 41) in a pinpoint shape near the folding line 43 at the position near the upper end.

The positions of the two folds 41, 42 near the upper outer ends of the folds 40, 40 are bonded to each other with an adhesive (bonded portion 8). These folded pieces 41, 4
The bonding portions 8, 8 of the two pieces may have a small range (for example, a range of about 2 to 5 mm) indicated by a dimension S in FIG.
Adhesion may be made over the entire width of 1,42.

The bonding portion 7 between the folding piece 42 and the back surface member 3 and the bonding portion 8 between the folding pieces 41 and 42 are formed, for example, as shown in FIG. That is, in the bag manufacturing example shown in FIG. 5, the front member 2 and the rear member 3 are formed of different films.
And the left and right side members 4 and 4 are formed into a bag shape, but before the members 2, 3, 4 and 4 are combined, the rear surface member 3 is formed.
The adhesive (adhesive ink) 7a is applied to the predetermined positions, and the adhesives (adhesive ink) 8a, 8a are also applied to the predetermined positions of the side members 4, 4. Back face material 3
The adhesive 7a on the side is sequentially applied to the inner surface of the rear surface material 3 at predetermined intervals (one product interval) in the length direction of the rear surface material as a set of two locations near both ends in the width direction. deep. On the other hand, the adhesive portions 8a, 8a on the side members 4, 4 side are the same as the adhesive 7a on the rear surface member 3 side in the length direction of the side member, on one side edge of the outer surface side of the side member 4. It is applied sequentially at intervals. The side members 4, 4 are folded into a V shape after applying the adhesive 8a. The front member 2, the rear member 3, and the side members 4, 4 have an application portion of the adhesive 7 a on the rear member 3 side and an application portion of the adhesive 8 a, 8 a on the side member 4, 4. The parts are sequentially combined in a state corresponding to the same position (each side edge is heat-sealed). At this time, the rear material 3 and the side materials 4, 4 by the adhesives 7a, 7a on the rear material 3 side.
4 is bonded (adhesion portions 7, 7), and both folds 41, 42 are adhered to each other by the adhesives 8 a, 8 a on the side members 4, 4 (adhesion portions 8, 8). ). Then, the formed cylindrical body 1A is sequentially cut in the vicinity of the bonding parts 7, 8 indicated by reference numerals EE to separate the cylindrical body having a product length. The detached tubular body is attached to each of the bonding portions 7,
The side where 8 is located becomes the bag opening 6, and the bottom material 5 is attached to the opening on the opposite side to complete the packaging bag.

The folded foldable packaging bag of the first embodiment is manufactured in a flat state as shown in FIG. The foldable packaging bag is filled with an article by using an automatic filling and packaging machine generally called a general packer. At this time, as shown in FIG. Lumber 3
Is sucked from the front and back to open the bag opening 6 greatly, and a predetermined amount of the article Y is filled into the bag from the opened opening 6.

By the way, in the foldable packaging bag according to the first embodiment, in each of the folds 40, 40, the position of one of the folds 42, 42 near the upper end is bonded to the rear surface material 3 (the bonding portions 7, 7). In addition, since the positions near the outer ends of the upper portions of the folded pieces 41 and 42 are bonded (bonded portions 8 and 8), the bag opening 6 can be opened and closed even if the packaging bag has folds on both sides. When it does, it can be treated like the one without the fold. That is, when the bag opening 6 is opened as shown in FIG.
The position of one of the folds 42 of the foremost part 40 is attached to the inner surface of the rear surface member 3, and each of the folds 41, 4
Since the positions close to the upper outer end of 2 remain bonded, the folds 40, 40 do not interfere with the filling of the bag with the articles. Then, after filling the articles, the bag opening 6 is closed and the opening 6 is sealed.
Because the upper part of 0,40 remains folded,
When the opening 6 is closed, the folds 40, 40 are reliably folded at the original folding lines 43, 43. Therefore, in this packaging bag, even if the packaging bag has a fold, an article filling operation can be easily performed, and the bag opening 6 can always be normally sealed, so that defective products due to packaging failure do not occur.

The folded packaging bag according to the second embodiment shown in FIGS. 6 to 8 is such that the bonded portions 8, 8 of the folded pieces 41, 42 in the folded packaging bag according to the first embodiment are eliminated. It is. That is, the positions of the folds 40, 40 closer to the upper side of one of the folds 42, 42 are respectively bonded to the rear surface member 3 (bonded portions 7, 7), but the upper ends of the folds 41, 42 are mutually connected. It can be freely moved. The other configuration of the second embodiment is the same as that of the first embodiment.

In the foldable packaging bag of the second embodiment,
When filling the bag with articles, the bag opening 6 is opened as shown in FIG.
Are bonded to the rear surface material 3 (adhesion portions 7,
7) Only the other folded pieces 41, 41 are opened as they are. Therefore, in the folded packaging bag of the second embodiment, when the bag opening 6 is opened,
The opening width in the front-rear direction (AB direction) is larger than that of the first embodiment (FIG. 4), and it becomes easier to insert the article discharge port of the automatic filling and packaging machine into the bag opening 6. Also, in the folded packaging bag according to the second embodiment, even when the bag opening 6 is opened, the folding lines 43 remain at the upper ends of the folding folds 40, 40. 8, the folded pieces 41, 41 on the opened side are smoothly folded as indicated by reference numerals 41 ', 41', respectively, as shown in FIG. Can always be folded in a normal posture. Therefore, even with the folded folding bag of the second embodiment, the article filling operation can be easily performed, and the bag opening 6 can always be normally closed (normal sealing can be performed).

The foldable packaging bag according to the third embodiment shown in FIGS. 9 and 10 is a modification of the second embodiment. In the third embodiment, the left fold 40 The upper end of the folded piece 42 on one side is adhered to the rear material 3 (adhesive part 7), and the upper end of the folded piece 41 on the other side of the right fold 40 is adhered to the front material 2 (adhered part 7). ing. And
In the folded folding bag according to the third embodiment, the bag opening 6 is opened from the closed state shown in FIG. 9 to be as shown in FIG. The foldable packaging bag according to the third embodiment functions almost in the same manner as the second embodiment.

In another embodiment of the present invention, the structure of each of the bonding portions 8, 8 of the first embodiment (the position near the upper outer end of the two folded pieces 41, 42) is different from that of the third embodiment. (A configuration in which they are bonded to each other).

[0025]

The foldable packaging bag of the present invention has the following effects. Effect of the Invention of Claim 1 In the invention of claim 1 of the present application, a fold 40 is formed by folding two fold pieces 41 and 42 inwardly into a V shape on each of the left and right side members 4 and 4. In the foldable packaging bag, the position closer to the bag opening 6 in one of the two folds 41, 42 of each fold 40, 40 is adhered to the front surface material 2 or the rear surface material 3. Therefore, even if the bag opening 6 is opened to the maximum, the center fold line 4 of each fold 40
3 and 43 are adhered to or close to the front member 2 or the rear member 3 while being bent. Therefore, even in the case of a folded foldable packaging bag, there is an effect that the folds 40, 40 do not become a hindrance when filling the bag with an article. Also, when the bag opening 6 is closed after the article is filled, the folds 40, 40 are reliably folded at the original fold line 43, so that the folds are neatly folded near the bag opening 6, There is also an effect that the bag opening 6 can always be sealed in a normal state (a defective product due to poor sealing does not occur). Effect of the invention of claim 2 of the present application The invention of claim 2 of the present application is the packaging bag with folds of claim 1, wherein two folds 41, 4 in each of the folds 40, 40.
2 are bonded to each other near the upper outer end, so that even a folded bag can be handled in the same manner as a bag without a fold when opening and closing the bag opening 6, and the bag is filled with articles. When folded, or when sealing the bag opening 6, there is an effect that the folds 40 do not interfere at all.

[Brief description of the drawings]

FIG. 1 is a perspective view of a folded packaging bag according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a perspective view showing a state in which the foldable packaging bag of FIG. 1 is inflated.

FIG. 5 is an explanatory diagram of a method of manufacturing the folded packaging bag of FIG. 1;

FIG. 6 is a perspective view of a folded packaging bag according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a state in which the foldable packaging bag of FIG. 6 is inflated.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a perspective view of a foldable packaging bag according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a state in which the foldable packaging bag of FIG. 9 is inflated.

FIG. 11 is a perspective view of a known foldable packaging bag.

FIG. 12 is a perspective view showing a state in which the foldable packaging bag of FIG. 11 is inflated.

FIG. 13 is a plan view of FIG. 11;

FIG. 14 is an explanatory view of a method of sealing the opening of the folded packaging bag of FIG. 12;

[Explanation of symbols]

1 is a cylindrical body, 2 is a front material, 3 is a rear material, 4 is a side material, 5
Is a bottom material, 6 is a bag opening, 7 is a bonding part, 8 is a bonding part, 4
0 is a fold, 41 and 42 are fold pieces, and 43 is a fold line.

Claims (2)

[Claims] A front member (2), a rear member (3), left and right side members (4, 4) are formed in a tubular shape, and each side member (4, 4) is formed.
4) A fold (40) is formed by folding two pieces (41, 42) inwardly into a V-shape, and an opening (6) for filling an article is formed at the top. A foldable packaging bag, wherein each of the folded pieces (41, 41) in each of the side members (4, 4) is provided.
42) Any one of the folded pieces (41 or 42)
Is adhered to the front material (2) or the rear material (3) by a small depth width near the opening (6). 2. The folds (40, 4) according to claim 1,
A folding bag with folds, characterized in that the positions close to the upper outer ends of the two fold pieces (41, 42) in (0) are adhered to each other.