JPH0920347A - Packing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packing bag easy to house an article by providing a handback part having a finger hole opened at the central part thereof on the upper part of a bag body part so as to extend the same from the upper edge film of the bag body part and providing recessed notch parts between the handbag part and side edge parts. SOLUTION: The bottom part 3 of a plastic film is folded in a W-shaped gussette form and both corners of a pair of double structures 6, 7 forming the W-shaped quadraplex structure of the bottom part 3 are fused at four heat seal parts N, R from the height H of a middle fold 11 to the folds 12, 13 of double structures 6, 7 to form corner bottom structures. Further, side edges are fused to form side edge fused parts L, M and handbag parts 4, 5 are extended upwardly from the films 1, 2 of a bag body part and hanging finger holes 10 are provided at the central parts of the handbag parts and the notch recessed parts 8 depressed downward from the upper ends P, S of the side fused parts L, M are provided at the opening part edges of left and right side parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular bottom plastic film packaging bag.

[0002]

2. Description of the Related Art Heretofore, a handbag bag made of a plastic film and having a corner bottom structure with side edges fused and a handbag portion has been widely manufactured. In these bags,
As shown in FIG. 7, when a wide rectangular parallelepiped-shaped product X is to be stored by the square bottom structure, if a product that exactly matches the bottom rectangle is placed in a plastic film packaging bag, a thin soft film is used. For this reason, it is difficult to insert the four sharp corners K of the rectangular parallelepiped into the film at the opening of the bag. That is, it is a troublesome operation to insert the article while keeping the bag body portion of the packaging bag in a rectangular parallelepiped shape and maintaining the article accurately vertically. For example, in the case of packed lunches, sushi, and the like that are crowded at lunchtime, it takes a lot of time to store them, which is an important problem that closely affects the sales of these bento boxes. In addition, if the size of the bag is large enough to accommodate the items to be stored, a little wrinkle will be created on the bag film, and the bag film will appear as a dull package when the items are placed and suspended. Noticeably worse.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging bag that is easy to store an item even when the size of the corner bottom is adjusted to the size of the item to be stored. is there.

[0004]

The inventor of the present invention increases the length of the peripheral edge L of the opening shown in FIG. 7 in order to make it easy to put an item in such a manner that the above-mentioned corner bottom size matches the size of the stored item. It has been found that, therefore, if a concave notch is provided on the peripheral edge, the length of the peripheral edge of the opening is increased and the product can be easily inserted while maintaining the size of the corner bottom. That is, when a rectangular parallelepiped article first enters the edge of the opening and then the handpiece is hung, the corner of the rectangular parallelepiped smoothly fits into the corner bottom. Then, when the recessed notch is provided in a folded shape in the folded state from the bag body side edge portion to the handbag portion, two pairs of notches are formed on both sides of the left and right side edge fusion line, It has been found that when a total of four punches are provided at the positions, the bag is not torn from the punched portions because gravity is not applied to the punched portions. The present invention has been completed based on this finding. That is, the present invention
The invention comprises the following items (1), (2), (3), (4) and (5). (1) A packaging bag made of a plastic film,
In the folded state, the bottom of the bag has a quadruple structure with a gusset-folded fold in the inside to form a quadruple structure, and the left and right side edges are double folds from the quadruple structure film on the bottom to the side. A square base of about 45 degrees inclined from the side edge to the bottom at a total of four right and left corners of all the two pairs of double film portions that form a quadruple structure of the folded portion by fusion bonding and fixing to the structure film A packaging bag having a square bottom structure by providing a slanted fusion line, which is provided with a handbag portion extending from the upper edge film of the bag body at the upper part of the bag body and having a finger hole at the center thereof. A packaging bag characterized in that a recessed notch is provided between the handbag and the side edge. (2) A packaging bag made of a plastic film,
In the folded state, the bottom of the bag has a quadruple structure with a gusset-folded fold in the inside to form a quadruple structure, and the left and right side edges are double folds from the quadruple structure film on the bottom to the side. A square base of about 45 degrees inclined from the side edge to the bottom at a total of four right and left corners of all the two pairs of double film portions that form a quadruple structure of the folded portion by fusion bonding and fixing to the structure film A square bottom structure is provided by providing an inclined fusion line, and the film is folded back from the upper edge film of the bag body to the inside of the bag body to form two pairs of double structures, and the right and left corners of each double structure are formed. A total of four hand-held slanting fusion lines that spread to the left and right at an angle of about 45 degrees from the top edge are fused, and the upper edge folds of the double structure between the hand-held slanting fusion lines are separated to form two pairs of double films. Separate the inner film from the outer film and attach the inner film to the handbag film. A packaging bag formed as Rumutepu, packaging bag, characterized in that a concave out-away portion between the handbag inclined melting wire and side edges. (3) With the concave portion of the bag folded, the width is 10 to 60 mm from the vicinity of the side edge toward the center and 5 to 40 mm from the opening edge.
The packaging bag according to item (1) or (2), which is a notch at the depth of. (4) The packaging bag according to item (1), (2) or (3), in which the film is cut out on parallel outer lines separated by 2 to 10 mm from the angled bottom fusion line. (5) The packaging bag according to item (2), in which the film is cut on parallel outer lines separated by 2 to 10 mm from the hand-held slant fusion line. The present invention has two types of the above-mentioned (1) and (2) depending on whether the structure of the handbag is a single film or a double film, and the concave notch makes it easier to insert an item. The technical ideas are the same. The notch of the concave portion of the present invention is appropriately determined according to the size and shape of the bag body, but in the folded state, from the immediate vicinity of the upper part of the side edge of the bag body toward the bag center direction, the width is 10 to 60 mm, and It is desirable that the mode of item (3) is provided below the edge of the opening with a depth of 5 to 40 mm. If the depth of the recess is small, the distance over which the length of the opening edge extends will be small, and the effect of the present invention will be lost. If it is too large, the strength of the opening edge will be weakened. Also, if the width of the recess is narrow, the strength decreases,
If it is too long, the width of the hand part becomes narrow.

[0005]

The present invention will be described with reference to the drawings.
1 and 2 show a plastic film with a W-shaped gusset fold at the bottom 3 as shown in the sectional view of FIG. 2 (the thickness of the thin plastic film is represented by a single line for the sake of clarity). A pair of two forming a W-shaped quadruple structure at the bottom.
Four heat seals N, N'and R, R'on both corners of the heavy structures 6, 7 (N 'and R'are on the back side of FIG. 1 and are not visible).
These are respectively overlapped with R ′ and N), and are fused at a slope of about 45 degrees from the height H of the middle fold 11 of the side edge to the folds 12 and 13 of the double structures 6 and 7 to form a well-known square bottom. By forming a structure, the side edges are fused to form the side edge fusions L and M, and the square bottom bag portion is provided. Further, handbag films 4 and 5 are respectively extended upward from the films 1 and 2 of the bag body portion, and finger holes 10 for hanging the handbag films 4 and 5 are provided at the central portions thereof. In the folded state of FIG. 1, the double edges of the side edges of the fusion bonding L and M are indented downwardly from the upper ends P and S, respectively, and then double upwardly cut along the concave curved line. A characteristic notch recess 8 is provided on the edges of the openings on the left and right sides. Due to the presence of the notched concave portion 8, when the film is developed around the side edge fusion M, two concave portions are formed between AS and SB as shown in FIG. As a result, the length of the peripheral edge of the opening between AB becomes longer, so that it becomes easier to store the product. Further, even when a force is applied to the concave portion 8 when the packaging bag is suspended, the tip of the concave portion has a curved concave shape, which serves as a cushioning function and prevents the film from tearing. When the tip of such a concave portion is provided directly above the side edge fusion M, a force is applied from the two hand parts, and there is a risk of tearing from the concave portion. Next, FIG.
In the packaging bag shown in FIG. 5, the handbags 4 and 5 shown in FIGS. 1 and 2 are further extended and the tips 14 and 15 are folded back inward.
The structure is a double structure, and the films 4 and 14 and 5 and 15 are heat-sealed at the left and right corners with the welding lines C and D inclined at about 45 degrees, and parallel to each other by about 5 mm from the heat-sealing fusion line. The right triangle portion was cut off on the line T. As described above, by cutting the heat-seal and the parallel lines T on the outer side of the heat-sealing line instead of cutting the inclined fusion-bonding line, it is possible to obtain a handpiece having a greater strength than the fusing. Next 4, 5
The upper edge crease is punched out at the central portion E of the fusion lines C and D to separate the films 4 and 14 and 5 and 15, and as a handy tape, insert a finger from the inside of the films 14 and 15 into the notch. , Film 14 and film 1
5 can be formed and the films 14 and 15 can be suspended by holding them as shown in FIG. The packaging bag of FIG. 4 is also provided with the recessed notch 8 which is a feature of the present invention, from the upper ends P and S of the side edges to the fusion lines C and D. The function and effect of the concave notch 8 in this case are the same as those in FIG. In the present invention, the width of the corner bottom is twice the size of the height H of the fold line 11, and 2 × H is subtracted from the width F of FIGS. 1 and 2 (F-2H). The vertical length of the bottom of the corner. When a rectangular parallelepiped such as a bento is stored in the bag of the present invention, (F-2H) = 2H at the square bottom. The rectangular parallelepiped to be housed in the present invention is often vertically long, and as a result, (F-2H) is about 1 to 3 times 2H, and in that case, F is 8 times H. Therefore, the dimension F of the present invention
Is 4 to 8 times, preferably 5 to 7 times H. The present invention can be changed from the bag in the plan view of FIG. 4 to the bag in the plan view of FIG. 8 in which the side edge of the bag body is shortened and the handhold portion is lengthened. Such a mode of lowering the side edge of the bag body can be similarly applied to the bag of FIG. Further, as in the bag of FIG. 9, it is preferable that the outer side of the corner bottom fusion bonding line of FIG. That is,
The bottom of the corner is easier to spread than in the case of a bag that is not cut out as shown in FIG. 4, and as a result, it is easier to insert a product even with a tight size. Also in this case, since the corner bottom is not subjected to the usual fusing process, it is once fused and then cut on the parallel line T to the corner bottom fusion line, so that the strength of the corner bottom is dramatically increased. . The cutting on the parallel line T outside the inclined fusion-bonded line of the square bottom can also be applied to the packaging bag of FIG.

[0006]

EFFECTS OF THE INVENTION By the notched concave portion 8 along the concave curve from the upper side edge to the handbag portion of the present invention, a product substantially matching the square bottom size of the bag can be quickly stored, and the side edge fusion line Since there are two concave portions on both sides, the concave portion does not easily tear the peripheral edge of the opening.

[Brief description of drawings]

FIG. 1 is a plan view of a packaging bag of one embodiment of the present invention in a folded state.

2 is a cross-sectional view of the packaging bag of FIG.

FIG. 3 is a perspective view showing the shape of a recessed recess when an item is stored in the packaging bag shown in FIG.

FIG. 4 is a plan view of another aspect of the present invention.

5 is a cross-sectional view of the packaging bag of FIG.

FIG. 6 is a perspective view showing the shape of the handbag when the items are stored in the packaging bag of FIG. 4.

FIG. 7 is a perspective view of a case of storing in a bag according to the related art.

FIG. 8 is a plan view of a packaging bag according to another aspect of the present invention.

FIG. 9 is a plan view of a packaging bag according to another aspect of the present invention.

[Explanation of symbols]

 1 bag body film 2 bag body film 3 bottom part 4 handbag film 5 handbag film 6 double structure 7 double structure 8 notch recess 10 finger hole 11 middle fold 12 bottom fold 13 bottom fold 14 handbag film tape 15 handbag film tape L Side edge fusion M Side edge fusion P Side edge upper edge S Side edge upper edge N Heat seal R Heat seal C Fusing seal D Fusing seal E Hand-cut notch H Middle fold height F Folded bag width T Cutting parallel line

Claims (5)

[Claims] 1. A packaging bag made of a plastic film, wherein, in a folded state, the bottom of the bag body has a fold-in portion of a gusset fold formed in a W-shaped cross section inside to form a quadruple structure. The parts are fused and fixed from the bottom quadruple structure film to the side double structure film, and the total of the left and right corners of the two pairs of double film parts forming the quadruple structure of the folding part are 4 in total. A corner bottom structure is provided by providing a 45-degree angled bottom fusion welding line that inclines from the side edge to the bottom at the location. The bag is extended from the top edge film of the bag to the upper part of the bag and the finger is attached to the center. What is claimed is: 1. A packaging bag provided with a handbag having a hole, wherein a concave notch is provided between the handbag and a side edge. 2. A packaging bag made of a plastic film, wherein in the folded state, the bottom of the bag body has a fold-in portion for gusset folding in a W-shaped cross section to form a quadruple structure. The parts are fused and fixed from the bottom quadruple structure film to the side double structure film, and the total of the left and right corners of the two pairs of double film parts forming the quadruple structure of the folding part are 4 in total. The corner bottom structure is provided by providing a corner bottom inclined fusion line of about 45 degrees that inclines from the side edge to the bottom at a location, and the film is folded back from the top edge film of the bag body to the upper part of the bag body part and two pairs of Double structure, 2 each
The left and right corners of the heavy structure are fused with a total of four hand-held slant fusion lines that spread to the left and right at an angle of about 45 degrees from the top edge, and the upper-edge folds of the double structure are separated between the hand-held slant fusion lines. A packaging bag in which an inner film of two pairs of double films is separated from an outer film, and the inner film is formed as a film tape of a handhold portion, wherein a concave punch is formed between the handheld slant fusion line and the side edge portion. A packaging bag having a cutout portion. 3. The recess has a width of 10 to 60 mm from the vicinity of the side edge toward the central portion in a state where the bag body is folded, and 5 to 5 from the opening edge.
The packaging bag according to claim 1 or 2, which is a notch having a depth of 40 mm. 4. The packaging bag according to claim 1, 2 or 3, wherein the film is cut on parallel outer lines separated by 2 to 10 mm from the angled bottom fusion line. 5. The packaging bag according to claim 2, wherein the film is cut out on parallel outer lines separated by 2 to 10 mm from the hand-held slant fusion line.