JP2022151675A - Gazette bag body with zipper and gazette bag package - Google Patents

Abstract

To provide a gazette bag body with a zipper that can secure a sufficient size of an opening part and stably stand by itself, and a gazette bag package.SOLUTION: There is provided a gazette 10, which comprises: a gazette bag body 11 having a pair of plane parts 2 formed of front parts 3 and rear parts 4, a pair of side parts 5 forming a cylindrical part 8 connecting the front parts 3 and rear parts 4, an opening part 9 opened at an upper part of the cylindrical part 8, and a side gazette 51, and four corner joint parts 14; and a linear zipper part 12, wherein the four corner joint parts 14 are formed within a range up to below a lower end of the zipper part 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a zippered gusset bag and a gusset bag package.

As is well known, a gusset bag is known that has gusset-shaped side portions connecting a front portion and a rear portion forming a pair of flat portions in order to increase the internal capacity of the packaging bag. Such a gusset bag has the advantage that the opening can be widened by widening the side portion.
In addition, gusset bags are widely used in which a chuck portion is provided near the opening so that the opening can be opened and closed freely.

For example, when a zipper is provided in a gusset bag having gusset-shaped side parts, the side part is provided from the bottom of the bag body to the bottom of the zipper part, and the zipper part having male and female types is provided like a bag without side parts. There is one arranged on each of a pair of plane portions (see, for example, Patent Document 1).

In addition, when providing a zipper part in a gusset bag having gusset-shaped side parts, the side parts are formed over the entire length in the vertical direction from the bottom of the bag body to the opening, and the side parts are brought closer to one flat part (for example, the rear part). One of the chuck parts having a male type and a female type is arranged over the entire width direction of the side of the pair of flat parts (for example, the front part) where the side part is not gathered, and the other is arranged with the side part gathered. There is one that is arranged on a plane portion (for example, a rear surface portion) (see, for example, Patent Document 2).

However, the zippered gusset bag body disclosed in Patent Documents 1 and 2 has a pair of plane portions and a pair of side portions, but the opening is composed only of a pair of plane portions. Therefore, it is difficult to increase the opening area.

Therefore, a gusseted bag body with a zipper that does not limit the opening of the opening has been developed (see Patent Documents 3 and 4).
For example, in the gusset bag body with a zipper described in Patent Document 3, by arranging zipper portions having male and female halves that can be fitted to each other on the surfaces facing each other when the side portions are folded, the side portions can be folded. The chuck portion can be fitted while the is folded. Since the male and female chucks are arranged on the pair of flat surfaces, respectively, the male and female chucks are located on one side and the female chuck on the other, respectively, with the folding line of the V-shaped gusset as the boundary. It is considered to have a complicated manufacturing process.

In addition, in the gusset bag body with a zipper described in Patent Document 4, a pair of flat surfaces and a pair of side surfaces are provided with linear zippers in the vicinity of the opening in a circumferential direction. This linear chuck portion has two or more anchor-shaped protrusions as claw portions, and can be fitted at any position.

JP 2004-010055 A JP-A-8-282689 Japanese Patent Application Laid-Open No. 2011-006103 JP 2006-290373 A

However, the zippered gusset bag described in Patent Document 4 has a zipper part near the opening and is heavy at the top. If it is light, it cannot be said to be sufficiently self-sustaining. In addition, the zippered gusset bag body described in Patent Document 4 is formed by folding a cylindrical base film provided with a backing portion into a V shape at a side gusset folding portion to form a side gusset portion, Furthermore, after sealing the top and bottom, it is manufactured by cutting to a specified length. The side gusset portion is folded, and the four corners of the gusset bag, which are boundaries between the side gusset portion, the front portion, and the back portion, are formed by folding lines. After the zippered gusset bag body is filled with the contents, the side gusset portion expands. If the contents are powdery, the folding lines at the four corners of the bag will be gently curved and no clear folding lines will be formed. As a result, the position to which the chuck portion is to be fitted becomes ambiguous, and not only is it difficult to seal the bag, but the appearance of the bag is also deteriorated.

The present invention has been made in consideration of such circumstances, and the position of the chuck is clear and easy to bend. To provide a zippered gusset bag body and a gusset bag packaging body which can stably stand on their own.

In order to solve the above problems, the present invention proposes the following means.
(1) A first aspect of the present invention is a gusseted bag body with a zipper, wherein a pair of plane portions consisting of a front portion and a rear portion are connected to the front portion and the rear portion to form a gusset-like fold. a pair of side surfaces forming a pair of flat portions and a tubular portion having a rectangular cross section; an opening formed at one end of the tubular portion; and a width direction of the pair of flat portions. and four corner joints formed at the four corners of the tubular portion positioned at both ends in the width direction of the pair of side surfaces; and the tubular portion below the opening. and a linear chuck portion formed in the circumferential direction, wherein the four corner joint portions are formed in a range below the chuck portion.

According to the zippered gusset bag body according to the present invention, since the four corner joints are provided at the four corners of the gusset bag body, the folding positions of the four corners are clear even at the position of the zipper part, and the zipper part is easily bent. The position to be fitted is not ambiguous, the appearance is excellent, and it can stand stably on its own. In addition, since the four corner joints are formed below the chuck portion, the four corner joints do not exist in the opening, so a large opening can be secured.
Here, the lower end of the chuck portion means the lowermost part in the vertical direction of the zippered gusset bag including the pedestal portion of the chuck portion. Similarly, the upper end of the zipper portion, which will be described later, refers to the uppermost portion of the zippered gusset bag including the pedestal portion in the vertical direction.

(2) In the zippered gusset bag body described in (1) above, the dimension L1 from the lower end of the zipper part to the upper end of the four corner joints is the folding line of the gusset shape from the width direction end of the side part. It may be formed substantially equal to the dimension L0 up to.

According to the zippered gusset bag body according to the present invention, the dimension L1 from the lower end of the zipper part to the upper end of the four corner joints is substantially the same as the dimension L0 from the width direction end of the side part to the gusset-shaped folding line. Since they are equally formed, the gusset bag package housing the contents closes the opening with the side gussets protruding outward from the gusset bag as shown in FIGS. In the case, in the height direction of the zippered gusset bag, from the bottom end to the height where the four corner joints are formed, it is formed into a substantially rectangular parallelepiped with the same shape as the bottom part, and above the four corner joints, the upper ends of the four corner joints An inclined portion inclined at about 45° is formed from the portion toward the intersection of the lower end of the chuck portion and the gusset-shaped folding line of the side portion, which is effective in design. Moreover, in addition to being able to secure a large opening, as shown in FIGS. , the opening is not obstructed by the joints at the four corners, and the two opposing chuck portions can extend in a straight line, so that the chuck portions can be easily fitted.
Furthermore, as shown in FIGS. 3(A) and 3(B), even when the side portions protrude inward of the gusset bag body and the gusset is folded to close the opening, the joints at the four corners are formed from the lower end. Up to the height where it is formed, it is formed into a substantially rectangular parallelepiped that has the same shape as the bottom part, and above the four corner joints, from the upper end of the four corner joints to the lower end of the chuck part and the intersection of the gusset-shaped folding line of the side part An inclined portion inclined at about 45° is formed in the direction of the arrow, which has a design effect.

(3) The zippered gusset bag body described in (1) above has a dimension L1 from the lower end of the zipper portion to the upper end of the four corner joints, and the folding line of the gusset shape from the width direction end of the side surface portion. Dimension L1≧Dimension L0 may be satisfied when the dimension L0 is defined as the dimension up to the dimension L0.

According to the zippered gusset bag body according to the present invention, the dimension L1 from the lower end of the zipper part to the upper end of the four corner joints, the dimension L0 from the width direction end of the side face to the gusset-shaped fold line side gusset 2(A) and 2(B), the side gussets are arranged outside the gusset bag as shown in FIGS. 2A and 2B. When the opening is closed by protruding in the direction, the two opposing chuck portions can be extended in a straight line, so that the chuck portions can be easily fitted and the opening can be closed.

(4) In the zippered gusset bag body according to any one of (1) to (3) above, the side portion includes a region on the front portion side and a center portion in the width direction of the side portion. It may have a side surface joint portion that joins the region on the rear surface portion side along the vertical direction.

According to the zippered gusset bag body according to the present invention, the lateral joint portion is provided at the center of the lateral portion in the width direction, where the front portion side region and the rear portion side region are joined in the vertical direction. Therefore, the side joints can improve the self-sustainability together with the four corner joints.

(5) In the zippered gusset bag body according to any one of (1) to (4) above, the zipper part has a notch at a position corresponding to the bending position of the gusset bag body. may

According to the zippered gusset bag body according to the present invention, the zipper part has the notch at the position corresponding to the bending position of the gusset bag body, as shown in FIGS. In addition, when the opening is closed by bending the side gusset with the side portion protruding inward of the gusset bag body, the chuck portion is also easily bent at the bent portion triggered by the notch. The bending of the gusset bag is not hindered, and the opening can be sealed substantially without gaps.
Here, the cut portion means a portion cut to such an extent that the chuck portion can be bent.

(6) The zippered gusset bag body according to any one of (1) to (5) above is formed in a range above the zipper part, and upper four-corner joints that do not overlap the zipper part. may be further provided.

According to the zippered gusset bag body according to the present invention, since the four corners of the gusset bag body have the four corner joints above and below the zipper part, the folding positions of the corners are defined above and below the zipper part, The folding position becomes clearer, the folding is easier, the fitting position of the chuck part is not ambiguous, the appearance is excellent, and it can stand stably on its own.

(7) The zippered gusset bag body according to any one of (1) to (6) above may have a rectangular bottom portion provided at the other end of the cylindrical portion.

According to the zippered gusset bag body according to the present invention, since it has a rectangular bottom portion, it is possible to increase the internal volume and improve the self-supporting property. In addition, according to the zippered gusset bag body according to the present invention, when the side joint portion and the bottom portion are provided, it is possible to form a gusset bag having a square bottom from one sheet of rectangular film. .

(8) In the zippered gusset bag body according to any one of (1) to (7) above, the zipper part has an engaging protrusion consisting of a plurality of rows of protrusions, and the engaging protrusion may have the same shape over the entire circumferential direction of the cylindrical portion.

According to the zippered gusset bag body according to the present invention, the side gussets are protruded outward of the gusset bag body to close the opening, or the side gussets are protruded inward of the gusset bag body to close the gusset. It can be folded to close the opening.

(9) In the zippered gusset bag body according to any one of (1) to (7) above, the zipper portion may be a hook-and-loop fastener that does not distinguish between male and female.

According to the zippered gusset bag body according to the present invention, since it has a zipper part made of a hook-and-loop fastener, it is excellent in flexibility. For this reason, the gusset bag can be easily folded without forming a notch in the zipper at the folded portion, so that the zipper does not hinder the folding of the gusset bag body. A hook-and-loop fastener that does not distinguish between males and females is closed when the engaging portions consisting of hooks are engaged with each other. The opening can be sealed substantially without gaps.

(10) A second aspect of the present invention is a gusset bag package in which contents are accommodated in the zippered gusset bag according to any one of (1) to (9) above.

According to the gusset bag package according to the present invention, the size of the opening is sufficiently ensured so that contents can be easily and efficiently taken in and out, and the bag can stand stably on its own.

According to the zippered gusset bag body and the gusset bag packaging body according to the present invention, the folding positions of the four corners are clear even in the position of the zipper part, and it is easy to fold, and the position where the zipper part is fitted is not ambiguous. It has an excellent appearance, can stand stably on its own, and can be opened and closed freely by ensuring a sufficiently large opening.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view illustrating a schematic configuration of a zippered gusset bag according to an embodiment of the present invention; FIG. 4 is a conceptual diagram illustrating a schematic configuration of a state in which contents are stored in a zippered gusset bag body according to one embodiment, side gussets are protruded outside the gusset bag body, and an opening is closed; ) shows a front view, and (B) shows a perspective view. FIG. 4 is a conceptual diagram illustrating a schematic configuration of a state in which contents are stored in a zippered gusset bag body according to an embodiment, side gussets are protruded inward of the gusset bag body, and an opening is closed; ) shows a front view, and (B) shows a perspective view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram illustrating a schematic configuration of a zippered gusset bag according to one embodiment, where (A) is a cross-sectional view taken along line IVA-IVA in FIG. 1 and (B) is a bottom view. FIG. 2 is a cross-sectional view taken along line VV in FIG. 1 for explaining a schematic configuration of a zippered gusset bag according to one embodiment. 1 is a partial perspective view showing the inside of a zippered gusset bag according to one embodiment. FIG. FIG. 4 is a front view of the zippered gusset bag according to the embodiment, with the side gussets folded inward. It is a cross-sectional conceptual diagram of the chuck|zipper part extended linearly which concerns on one Embodiment, (A) has shown the state which is not engaged, and (B) has shown the engaged state. FIG. 4 is a front view illustrating a schematic configuration of a flat bag in a flat bag forming step according to the manufacturing method of one embodiment; (A) and (B) are perspective views showing a configuration of a modification of the zippered gusset bag. FIG. 10 is a perspective view showing the configuration of a zippered gusset bag according to a modified example in which a notch is provided; FIG. 10 is a perspective view illustrating a schematic configuration of a zippered gusset bag according to a modification in which upper four corner joints are provided;

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9. FIG.
1 to 7 are diagrams for explaining the schematic structure of a zippered gusset bag body according to this embodiment, FIG. 1 being a perspective view, and FIG. FIG. 3 is a conceptual diagram of the state in which the opening is closed by protruding outward from the body, FIG. 1 is a cross-sectional view indicated by arrow IVA-IVA, FIG. 4B is a bottom view, FIG. 5 is a cross-sectional view indicated by arrow VV in FIG. 1, and FIG. 6 is a partial perspective view showing the inside. , FIG. 7 shows a front view with the side gussets folded inwards. 2 and 3 omit the thickness of the film. The oblique lines shown in FIGS. 1 to 3, 6, and 7 indicate the joint portion, and the oblique lines shown in FIGS. 4A and 4B indicate the cylindrical portion. Also, in the above drawings, the thickness of the film may be emphasized in order to facilitate understanding.

In the drawings, reference numeral 1 denotes a bottom portion, 2 denotes a pair of flat portions, 3 denotes a front portion, 4 denotes a rear portion, 5 denotes a pair of side portions, and 6 denotes a right side portion. Reference numeral 7 denotes a left side portion, reference numeral 10 denotes a gusset bag body with a zipper, reference numeral 11 denotes a gusset bag body, reference numeral 12 denotes a chuck portion, reference numeral 14 denotes a four-corner joint portion, reference numeral 21 denotes a bottom gusset, and reference numeral 51 denotes a side surface. The gussets, 52 the lateral joints and 55 the angled joints.

The zippered gusset bag body 10 includes a gusset bag body 11 and a zipper portion 12, as shown in FIG.

The gusset bag body 11 is formed into a bag shape by folding a sheet of rectangular film.
A film is, for example, a laminate comprising at least a substrate layer and a heat-sealable layer. The substrate layer forms the outermost layer of the laminate, and the heat-sealable layer forms the innermost layer of the laminate. The substrate layer is formed of a biaxially stretched film or a uniaxially stretched film of polyethylene terephthalate, polypropylene, polyamide, etc., which are excellent in printability and strength, and is formed of a single layer or multiple layers of these. good too. It may also be made of paper or non-woven fabric. The heat-sealable layer is formed of an unstretched film of a polyethylene-based resin such as polypropylene-based resin, low-density polyethylene, or linear low-density polyethylene, or a layered resin.
As materials exhibiting a gas barrier function to block oxygen and water vapor, the films described above on the substrate layer, or deposited films in which a metal such as aluminum or a metal oxide such as aluminum oxide or silicon oxide is deposited thereon. One or more layers of metal foil may be used as a functional layer between the substrate layer and the heat-sealable layer. These layers are laminated by a known method such as a dry lamination method or an extrusion lamination method to form a laminate.
Also, the film is not limited to a laminate, and may be a single layer film.

The gusset bag body 11 has a pair of flat surface portions 2 consisting of a front surface portion 3 and a rear surface portion 4, and a pair of side surface portions 5 having gusset-like folds. One end of a tubular portion 8 having a rectangular cross-section formed by .theta. Further, the gusset bag 11 is provided with four corner joints 14 at the four corners of the rectangular cylindrical portion 8 and side joints 52 at the gusset-like folding positions at the center of the width direction of the side portion 5 . . Further, in this embodiment, the gusset bag 11 is provided inside the side surface portion 5 with a folding portion 24 that connects the bottom surface portion 1 and the side surface portion 5 .
Although the details will be described later, the chuck portion 12 is linear and formed in the circumferential direction of the tubular portion 8 below the opening portion 9 . Also, the four corner joints 14 are formed below the lower end 12T of the chuck portion 12 .

The zippered gusset bag 10 having the zipper part 12 in the gusset bag 11 accommodates the contents, and then, as shown in FIGS. 3(A) and 3(B), the side surface portion 5 is protruded toward the inside of the gusset bag 11 and the gusset is folded to close the opening 9. may be closed.

[Bottom part]
As shown in FIGS. 1 and 4A, the bottom portion 1 is provided at the other end of the cylindrical portion 8, and includes a pair of long sides 1A, which are a pair of first opposite sides, and a pair of first opposite sides. It has a pair of short sides 1B which are two opposite sides, and is formed in a substantially rectangular shape when viewed from above.
A pair of long sides 1A of the bottom surface portion 1 are connected to the front surface portion 3 and rear surface portion 4 of the pair of flat surface portions 2, respectively.
A pair of short sides 1B of the bottom portion 1 are connected to folding portions 24, which will be described later.

4 and 7, the bottom portion 1 has a gusset-like fold, that is, a bottom gusset 21. As shown in FIGS. The bottom gusset 21 is bent so as to protrude inward of the bag when the gusset bag body 11 is folded. The bottom gusset 21 has a valley fold portion 25 that is bent so as to protrude inward of the bag, and a mountain fold portion 26 that is folded so as to protrude outward from the bag. The valley fold portion 25 includes a straight portion 25a that is parallel to the front surface portion 3 and the rear surface portion 4 and terminates inside the peripheral portion of the bottom surface portion 1 at an intermediate portion between the front surface portion 3 and the rear surface portion 4, and both ends of the straight portion 25a. and a V-shaped portion 25b extending from the portion 25c toward the corresponding corner portion of the bottom portion 1. As shown in FIG. The mountain folds 26 extend substantially perpendicularly from both end portions 25c of the straight portions 25a of the valley folds 25 toward the short side 1B of the bottom portion 1. As shown in FIG. By bending the bottom gusset 21 so as to protrude inwardly of the bag, the bottom surface portion 1 is folded so that the front surface portion 3 and the rear surface portion 4 are adjacent to each other.

[Flat part]
A pair of plane portions 2 (hereinafter sometimes referred to simply as plane portions 2) are composed of a front portion 3 and a rear portion 4, as shown in FIGS.
When viewed from the front, the front surface portion 3 and the rear surface portion 4 are formed in a rectangular shape elongated in the vertical direction. , and rises upward through the bottom portion 1 to face each other with the bottom portion 1 interposed therebetween.

[Side part]
As shown in FIGS. 1 and 4, the pair of side portions 5 (hereinafter sometimes simply referred to as side portions 5) has a right side portion 6 and a left side portion 7, and is folded into a gusset shape, that is, a side gusset. 51 and is bent inwardly of the gusset bag body 11 so as to be convex.
Moreover, the right side portion 6 and the left side portion 7 are formed in a rectangular shape elongated in the vertical direction when viewed from the side.
A pair of side surface portions 5 connect the front surface portion 3 and the rear surface portion 4 to form a cylindrical portion 8 having a rectangular cross-section and forming a housing space inside which is a square rectangular parallelepiped that forms the shape of the bottom surface portion 1. is doing.

As shown in FIGS. 1, 4, and 6, the side joint portion 52 is formed in a front portion side region 53 positioned on the front portion 3 side of the right side portion 6 and the left side portion 7 at the center portion in the width direction of the side portion. and a rear surface portion side region 54 located on the rear surface portion 4 side are connected in the vertical direction.
The front side region 53 and the rear side region 54 are connected via the side joint portion 52 .
In the side joining portion 52, the film located in the front side region 53 and the film located in the rear side region 54 are overlapped in the thickness direction and welded to join.

As shown in FIG. 6, isosceles triangular folded portions 24 are formed on the inner surfaces of the side portions 5, respectively. FIG. 6 shows only the right side portion 6 side.
The folded portion 24 is formed in the shape of a right-angled isosceles triangle with the short side 1B of the bottom portion 1 as the oblique side 24L when viewed from the inside of the zippered gusset bag 10 .

As shown in FIG. 5, the portion where the folding portion 24 is formed on the side portion 5 and the back side of the zippered gusset bag 10 is formed by stacking three films in the thickness direction.
Out of the three films, the outer two films are joined to each other by an inclined joining portion 55 (see FIG. 6) formed on the side portion 5 . In other words, an inclined joint portion 55 is formed along two equilateral sides 24M of the isosceles triangle that constitutes the folded portion 24, whereby the folded portion 24 and the side portion 5 are joined.

A bottom side end portion 24 a where the bottom joint portion 22 intersects with the outer side corresponding to the upper side in the vertical direction of the inclined joint portion 55 formed with a certain width is the bottom portion 1 of the gusset bag body 11 . It has four corners.

As a result, the gap between the equal sides 24M of the folded part 24 and the side part 5 is closed, so that when the zippered gusset bag body 10 is filled with the contents, the contents will not fill the gap between the folded part 24 and the side part 5. are prevented from entering.

The four corner joints 14 join both widthwise sides of the pair of flat portions 2 and both widthwise sides of the pair of side portions 5 at the four corners of the rectangular cylindrical portion 8 of the gusset bag body 11 . Further, the four corner joints 14 are provided below the chuck portion 12 provided in the circumferential direction of the cylindrical portion 8 below the opening portion 9 . In the portion where the four corner joints 14 are formed in the vertical direction of the four corners of the rectangular cylindrical portion 8, the right side surface 6 and the left side surface 7 are vertically connected to the front surface 3 and the rear surface 4 via the four corner joints 14. connected along the direction.

As shown in FIGS. 1 to 3, 6, and 7, the four corner joints 14 are formed in a range below the lower end 12T of the chuck portion 12 (bottom portion 1 side).
As a result, the chuck portion 12 is arranged without being sandwiched between the four corner joint portions 14 .

In the vertical direction of the gusset bag body 11, in the four corners of the rectangular cylindrical portion 8 where the four corner joint portions 14 are not formed, the right side portion 6 and the left side portion 7 are connected to the front portion 3 via the boundary line 10L. and the rear surface portion 4 along the vertical direction. The boundary lines 10L are the outer edges of the four corner joints 14 and their extensions.

As shown in FIG. 7 , the four corner joints 14 preferably have a dimension L1 from the lower end 12T of the chuck part 12 to the upper end 14T of the four corner joints 14 that extends from both ends of the side face 5 in the width direction to the side face 5. is formed to be approximately equal to the dimension L0 to the gusset-like folding line of the . By setting in this way, the gusset bag package 100 in which the contents are accommodated in the zippered gusset bag 11 has the side gussets 51 projected outward from the gusset bag 11 as shown in FIG. When the opening 9 is closed, in the height direction of the zippered gusset bag 11, the area from the lower end to the height where the four corner joints 14 are formed is formed into a substantially rectangular parallelepiped having the same shape as the bottom surface 1, and the four corner joints 14 are formed. The upper side is an inclined portion inclined at about 45° from the upper end 14T with the upper end 14T of the four corner joints 14 as the base point toward the intersection of the lower end 12T of the chuck portion 12 and the gusset-shaped folding line of the side surface. is formed, and a design effect is produced. Further, as shown in FIGS. 2A and 2B, when closing the opening 9 by projecting the side gusset 51 to the outside of the gusset bag 11, the opening 9 is obstructed by the four corner joints 14. The right side front side area 53, the front side 3, the left side front side area 53, the right side rear side area 54, the rear side 4, and the left side rear side area 54 are each aligned. The two chuck portions 12 that extend linearly and are opposed to each other can also extend in a straight line, and the chuck portions 12 can be easily fitted and the opening 9 can be reliably closed.

Further, as shown in FIG. 3, even when the side gusset 51 protrudes inward from the gusset bag body 11 and is folded to close the opening 9, the four corner joints 14 are formed from the lower end. Up to the height, it is formed into a substantially rectangular parallelepiped having the same shape as the bottom surface portion 1, and above the four corner joint portions 14, the upper end portion 14T of the four corner joint portions 14 is a base point, and from the upper end portion 14T to the lower end 12T of the chuck portion 12 and the side portion. An inclined portion inclined at about 45° is formed toward the intersection with the gusset-like fold line of the , which has a design effect.

In addition, not only when the dimension L1 and the dimension L0 are substantially equal, but when the dimension L1≧the dimension L0, the side gusset 51 projects outward from the gusset bag body 11 as shown in FIG. When closing the opening 9, the front side area 53 of the right side 6, the front side 3, the front side 53 of the left side 7, and the rear side of the right side 6 are not obstructed by the four corner joints 14. The side region 54, the rear face portion 4, and the rear face portion side region 54 of the left side face portion 7 can each extend in a straight line, and the two opposing chuck portions 12 can also extend in a straight line, respectively. 12 is preferable because it can be easily fitted and the opening 9 can be reliably closed.
It should be noted that the fact that L1 and L0 are approximately equal is not limited to L1=L0, but means approximately 0.9·L0≦L1≦1.1·L0.

Further, the four corner joints 14 are preferably formed to a position where the upper ends 14T of the four corner joints 14 are aligned with the height (vertical length and filling amount) of the contents to be accommodated. The shape of the upper end portion 14T of the four corner joints 14 is an arc or an inclined shape that is inclined in either the width direction, thereby preventing the film from tearing from the boundary line near the upper end portion 14T of the four corner joints 14. It is preferable because

Also, the four corner joints 14 are preferably formed at positions that do not overlap the inclined joints 55 . Specifically, it is preferably formed above the inclined joint portion 55 to the extent that it does not contact the inclined joint portion 55 .
As a result, the expansion of the bottom surface portion 1 can be expanded in a rectangular shape without being hindered by the four corner joints 14 .

As shown in FIGS. 1 to 3, the gusset bag 11 is arranged below and outside the lower edges of the front surface portion 3, the rear surface portion 4, the right side surface portion 6, and the left side surface portion 7, and the four sides of the bottom surface portion 1. is formed with a bottom joint portion 22 extending on the same plane as the front portion 3, the rear portion 4, the right side portion 6 and the left side portion 7. As shown in FIG.

The bottom joint portion 22 is formed at the lower end of the gusset bag body 11 , along the periphery of the bottom face portion 1 , along the entire circumference of the gusset bag body 11 in the circumferential direction. The bottom joint portion 22 protrudes downward from the bottom portion 1, as shown in FIGS. As a result, the gusset bag body 11 is self-supporting with the bottom joint portion 22 serving as a leg.

The front surface portion 3 and the rear surface portion 4 are connected to the inner edge of the bottom joint portion 22 , and the inner edge of the bottom joint portion 22 coincides with the long side 1A of the bottom portion 1 . Therefore, the front surface portion 3 and the rear surface portion 4 are connected to the bottom surface portion 1 via the bottom joint portion 22 .

Next, the chuck portion 12 will be described with reference to FIG. The chuck portion 12 is formed in a linear shape arranged along the circumferential direction of the cylindrical portion 8 below the opening portion 9. FIG. 8 is a conceptual cross-sectional view of the chuck portion 12 extending linearly.
In this embodiment, the chuck portion 12 has engaging protrusions 121 and 125 that have the same shape over the entire circumferential direction of the cylindrical portion 8 . That is, the chuck portion 12 is a pair of same-shaped chuck portions 12A and 12B having engaging protrusions 121 and 125 that are fitted to each other. The pair of chuck portions 12A and 12B are sandwiched by the side joint portion 52 while being fitted to each other.
One chuck portion 12A of the chuck portions 12 passes from one side joint portion 52 to the front portion side region 53 of the left side portion 7, the front portion 3, and the front portion side region 53 of the right side portion 6 to the other side joint portion. It extends to 52 and is arranged on the front half circumference of the tubular portion 8 . The other chuck portion 12B extends from one side joint portion 52 to the other side joint portion 52 through the rear surface portion side region 54 of the left side portion 7, the rear surface portion 4, and the right side portion 6. , are arranged on the half circumference of the cylindrical portion 8 on the rear surface side.

Not only can the chuck portions 12A and 12B be fitted together, but also the chuck portions 12A and the chuck portions 12B can be fitted together.
For example, as shown in FIG. 2, when the side gussets 51 protrude outward from the gusset bag body 11 to close the opening 9, the opening 9 is similar to a flat bag having side joints 52, 52 at both ends. becomes the shape of That is, with the side joint portions 52, 52 as both ends, the front side region 53 of the left side portion 7, the front side region 53 of the front portion 3 and the right side portion 6 are one surface, and the rear side region 54 of the left side portion 7 is formed. , the rear surface portion side regions 54 of the rear surface portion 4 and the right side surface portion 6 are the other surfaces facing one surface, and have the same shape as a flat bag. As a result, the chuck portions 12A and 12B are each elongated, and the opening portion 9 can be closed by fitting the chuck portions 12A and 12B together.

Further, as shown in FIG. 3, when the side gussets 51 are protruded inwardly of the gusset bag 11 and bent to close the opening 9, the opening 9 on both sides of the gusset bag 11 in the width direction The front portion side region 53 of the portion 5 and the front portion 3 face each other, the rear face portion side region 54 and the rear face portion 4 face each other, and the side face portion 5 and the plane portion 2 face each other. On the other hand, the opening 9 at the center in the width direction of the gusset bag 11 has the shape of a gusset bag in which the front surface portion 3 and the rear surface portion 4 face each other. As a result, the chuck portions 12A are located at positions where the front portion side region 53 and the front portion 3 face each other, and the chuck portions 12B are located at positions where the rear portion side region 54 and the rear portion 4 face each other. and the rear surface portion 4 are opposed to each other, the opening portion 9 can be closed by fitting the chuck portion 12A and the chuck portion 12B.
The chuck portion 12A and the chuck portion 12B are chuck portions 12 having the same shape, in which the respective engaging protrusions 121 and 125 can be fitted to each other. The side gussets 51 may protrude outward from the gusset bag 11 to close the opening 9, and as shown in FIG. The opening 9 can also be closed by folding.

The chuck portions 12A and 12B, for example, as shown in FIGS. 8A and 8B, have engagement protrusions 121 and 125 arranged in four rows in the width direction on a linearly extending pedestal portion 120. The engagement projection 125 of the chuck 12B fits into the groove between the engagement projections 121, 121 of the chuck 12A, and the chuck 12A fits into the groove between the engagement projections 125, 125 of the chuck 12B. The chuck portion 12A and the chuck portion 12B are fitted to each other by fitting the engaging protrusions 121 . Further, the chuck portions 12A are fitted to each other by fitting the engaging projection portion 121 of the chuck portion 12A facing the groove portion between the engaging projection portions 121, 121 of the chuck portion 12A. Similarly, the engaging protrusions 125 of the chuck part 12B are fitted into the grooves between the engaging protrusions 125 of the chuck part 12B, so that the chuck parts 12B are fitted to each other.

The shape and number of rows of the engaging projections 121 of the chuck portion 12A are not particularly limited. , and a wide claw portion 123 connected to the top of the base end wall portion 122 and having an anchor-shaped cross section, and four rows of engaging protrusions 121 extending linearly in parallel.
Similarly, the shape and the number of rows of the engaging protrusions 125 of the chuck portion 12B are not particularly limited, but the chuck portion 12B of the present embodiment has, for example, a fixed-thickness proximal end extending vertically from the pedestal portion 120. It has a wall portion 126 and a wide hook portion 127 connected to the top portion of the base end wall portion 126 and having an anchor-shaped cross section, and has four rows of engaging protrusions 125 extending linearly in parallel. there is
In order to fit the chuck portions 12A and 12B, the chuck portions 12A together, or the chuck portions 12B together, it is not necessary that all the engaging projections 121 and 125 fit into all the grooves, and at least one row of the engaging projections 121 and 125 need not fit. It suffices if the engaging protrusion is fitted in the groove.

Although the material forming the chuck portion 12 can be set arbitrarily, at least the layer facing the gusset bag body 11 of the pedestal portion 120 is the innermost layer of the film forming the gusset bag body 11 . It is preferable that it is made of a resin that can be heat-sealed with the fusion layer. The material of the engaging protrusions 121 and 125 is not particularly limited, but it is preferable to use polyolefin resin, particularly polyethylene resin, because it is flexible and easy to engage.

Further, as shown in FIG. 3, the chuck portion 12 at least corresponds to the gusset bag 11 when the side gusset 51 is protruded toward the inside of the gusset bag 11 and folded to close the opening 9. It is preferable to have a notch portion 12D made up of one or more notches 12C as shown in FIG. 11, for example, at the bent position. Specifically, the cut portions 12D are formed by four boundary lines 10L forming boundaries between both sides of the pair of flat portions 2 in the width direction and both sides of the pair of side portions 5 in the width direction, and gusset-like folds of the side portions 5. It is preferable that they are formed at six positions corresponding to the lines. Since the chuck portion 12 is formed with six cut portions 12D, it can be easily bent at the boundary line 10L and the side gusset 51. The opening 9 can be closed without any gap. Here, "substantially without gaps" means that the contents do not spill out. Each notch 12D may consist of one notch 12C, or may consist of a plurality of notches 12C. Moreover, the notch 12</b>D may be provided over the entire length of the linear chuck portion 12 . If the notch 12D is provided over the entire length of the linear chuck portion 12, the position where the gusset bag 11 is folded and the position of the notch 12D of the chuck portion 12 are aligned when manufacturing the zippered gusset bag 10. It is not necessary, and it is suitable for gusset bag bodies 10 of various sizes. The depth of each cut 12</b>C is not particularly limited as long as it does not divide the linear chuck portion 12 .

In addition, the chuck portion 12 melts and crushes the engaging protrusions 121 and 125 together with the heat-sealing layer of the film at the position corresponding to the side joint portion 52 , so that the side joint portion at the portion sandwiching the chuck portion 12 is crushed. It is preferable to prevent insufficient bonding strength at 52 . For this reason, it is preferable that the side joint portion 52 has a partial joint portion where a strong seal is partially applied in the portion overlapping with the engaging protrusions 121 and 125 . In addition, when the engaging protrusions are arranged in multiple rows, crushing the engaging protrusions increases the amount of resin to be melted, and there is a possibility that insufficient bonding strength cannot be suppressed only by crushing the engaging protrusions. Therefore, at the position overlapping the side joint portion 52 of the chuck portion 12, the engagement protrusions 121 and 125 may be removed in advance and then welded to the film.

<Manufacturing method of zippered gusset bag>
Next, an example of a method for manufacturing the zippered gusset bag body 10 will be described.
FIG. 9 is a front view of a flat bag 10B according to this embodiment.

The zippered gusset bag body 10 is manufactured by deforming a flat bag 10B formed from a zippered film. In the method of manufacturing the zippered gusset bag body 10, the method of manufacturing the zippered gusset bag body 10 from the prefabricated flat bag 10B and the step of manufacturing the flat bag 10B are continuously or discontinuously performed. Second, there is the case of manufacturing the zippered gusset bag body 10 .
The method of manufacturing the zippered gusset bag 10 includes (1) film forming step with zipper, (2) flat bag forming step, (3) flat bag expanding step, (4) folding step, and (5) ) four-corner joint forming step. Each step will be described below.

(1) Step of forming a chuck-equipped film First, along the longitudinal direction of a long belt-shaped film, the long material of the chuck part 12 is joined by heat welding to form a linear chuck-equipped film ( (not shown).
Specifically, the width dimension when viewed along the longitudinal direction is the total dimension of the pair of flat surface portions 2, the bottom surface portion 1, and the two unfolded bottom joint portions 22 before bonding. The elongated material of the linear chuck part 12 is welded to the vicinity of both ends in the width direction of one film.
At this time, on the long material of the chuck part 12, at positions corresponding to the gusset-like folding lines of the side parts 5 of the gusset bag body 11 and the boundary lines 10L between the pair of flat parts 2 and the pair of side parts 5, It is preferable to form the notch 12D in advance.

(2) Flat Bag Forming Step A flat bag 10B that can be a zippered gusset bag body 10 is formed from a piece of film with a zipper. The flat bag 10B is formed by folding a piece of film with a zipper into a W shape and then joining predetermined portions. As shown in FIG. 9, the flat bag 10B includes a pair of base portions 20 which will later become a pair of flat portions 2, 2 and a pair of side portions 5, 5, a bottom gusset 21, a side joint portion 52, and a bottom joint portion. 22 and an angled joint 55 . In FIG. 9 , the two-dot chain line indicates a boundary line 10L between the plane portion 2 and the side portion 5 that will be formed later. shows the area where

At the stage of forming the flat bag 10B, first, the bottom gusset 21 is formed by folding one film with a zipper into a W shape. The bottom gusset 21 of the flat bag 10B forms the bottom portion 1 and the folding portion 24 of the zippered gusset bag body 10. - 特許庁The bottom gusset 21 is folded in two to protrude inward of the bag. The bottom gusset 21 is formed between a pair of base portions 20 formed by folding a film with a zipper. A pair of base portions 20 of the flat bag 10B constitute a pair of flat portions 2 and a pair of side portions 5 of the zippered gusset bag body 10 .

Next, the side joint portions 52 are formed by joining both end edges of the pair of base portions 20 . The side joint portion 52 joins the base portion 20 and the bottom gusset 21 at the position where the bottom gusset 21 overlaps. When the bottom gussets 21 are joined together at a position where the bottom gussets 21 overlap each other, a heat-sealable coating agent is applied to at least the base layer of the film at that position, and the base layer is joined by welding. Bonding by welding or bonding with an adhesive can be performed by using those having a heat-sealable layer. Next, the bottom joint portion 22 is formed by joining the boundary between the pair of base portions 20 and the bottom gusset 21 . Both ends of the bottom joint portion 22 are connected to the side joint portions 52 . The bottom joint portions 22 are provided on one side and the other side of the pair of base portions 20, respectively.

Next, an inclined joint portion 55 is formed to obliquely connect the side joint portion 52 and the bottom joint portion 22 . The inclined joint portion 55 joins the base portion 20 and the bottom gusset 21 . At this time, the inclination angle of the inclined joint portion 55 with respect to the bottom joint portion 22 is about 45°. The end of the inclined joint portion 55 on the side of the side joint portion 52 is provided at the same position as the folding line of the bottom gusset 21 in the longitudinal direction of the side joint portion 52 .

The above-described side joint portion 52, bottom joint portion 22, and inclined joint portion 55 are formed by joining films with chucks by welding, thereby fusing the heat-sealable layers of the films.
The order of forming the side joint portion 52, the bottom joint portion 22, and the inclined joint portion 55 is not limited to the order described above. The side joints 52, the bottom joints 22 and the angled joints 55 may be formed at the same time.

(3) Flat Bag Opening Step In the flat bag opening step, the pair of base portions 20 of the flat bag 10B are separated from each other so that an isosceles triangular folded portion 24 is formed along the inclined joint portion 55. , the flat bag 10B is expanded.

First, the pair of base portions 20 of the flat bag 10B are separated from each other and bent at the four boundary lines 10L. As a result, the front surface portion 3 , the rear surface portion 4 and the pair of side surface portions 5 are formed from the pair of base portions 20 . Further, a rectangular bottom portion 1 is formed on the side opposite to the opening portion 9 . As the pair of base portions 20 move apart, an isosceles triangular folded portion 24 is formed along the inclined joint portion 55 . At this stage, the gusset bag body 11 without the four corner joints 14 is formed from the expanded flat bag 10B.

(4) Folding process In the folding process, after the unfolding process, the pair of side surface parts 5 and the bottom surface 2 are protruded toward the inside of the bag, and the front surface part 3 and the rear surface part 4 are brought into close contact with each other. 6, bottom gussets 21 and side gussets 51 are formed to form a closed zippered gusset bag.

(5) Four-corner Joint Forming Step In the four-corner joint forming step, the chuck portions 12 are formed along the four boundary lines 10L that are the boundaries between the pair of flat portions 2 and the pair of side portions 5 of the zippered gusset bag body. Four corner joints 14 are formed up to the bottom of the . As shown in FIG. 1, the four corner joints 14 have a height lower than the lower end 12T of the zipper part 12 in the height direction of the zippered gusset bag. The four-corner joints 14 are formed by joining the films of the zippered gusset bag body by welding and by fusing the heat-sealing layers of the films to each other, similarly to the other joints. The zippered gusset bag body 10 is completed by forming the four corner joints 14 in the zippered gusset bag body.

A gusset bag package 100 is formed by accommodating contents such as stick-like contents such as instant coffee and sugar, powdery contents, and granular contents in a zippered gusset bag body 10 . The contents may be accommodated as a contents accommodation step subsequent to the four-corner joint forming step, or may be carried out in a separate filling machine with the zippered gusset bag body 10 .

According to the zippered gusset bag body 10 according to the present embodiment, since the four corner joints 14 are formed at the four corners of the gusset bag body 11, the folding positions of the four corners are clear even at the position of the zipper part, making it easy to bend. The position where the chuck part is fitted is not ambiguous, the appearance is excellent, and it can stand stably on its own. Further, since the four corner joints 14 are formed only below the chuck portion 12, a sufficiently large opening 9 can be secured when the chuck portion 12 is unsealed.
Moreover, since the two side joints 52 are formed, the self-sustainability can be improved together with the four corner joints 14 .

Further, according to the zippered gusset bag body 10, the dimension L1 from the lower end 12T of the zipper part 12 to the upper end of the four corner joints 14 is formed substantially equal to the dimension L0 from the widthwise end of the side face to the side face gusset. As shown in FIG. 2, the gusset bag package 100 in which the contents are accommodated is a zippered gusset when the side gusset 51 protrudes outward from the gusset bag 11 and the opening 9 is closed. In the height direction of the bag body 11, from the lower end to the height where the four corner joints 14 are formed, it is formed into a substantially rectangular parallelepiped having the same shape as the bottom surface 1, and above the four corner joints 14, the four corner joints 14 are formed. An inclined portion inclined at about 45° is formed from the upper end portion 14T toward the intersection of the lower end 12T of the chuck portion 12 and the gusset-shaped folding line of the side portion, which is effective in design. As shown in FIG. 2, when the side gusset 51 is protruded outside the gusset bag body 11 to close the opening 9, the opening 9 is not obstructed by the four corner joints 14, and the front surface of the right side surface is closed. A side region 53, a front portion 3, a front portion side region 53 of the left side portion, a rear portion side region 54 of the right side portion, a rear portion 4, and a rear portion side region 54 of the left side portion each extend in a straight line and face each other. The chuck portions 12 of the book can also be extended in a straight line, and the chuck portions 12 can be easily fitted, and the opening portion 9 can be reliably closed.
Furthermore, as shown in FIG. 3, even when the side gusset 51 protrudes inward from the gusset bag body 11 and is folded to close the opening 9, the four corner joints 14 are formed from the lower end. Up to the height, it is formed into a substantially rectangular parallelepiped having the same shape as the bottom surface 1, and above the four corner joints 14, from the upper end 14T of the four corner joints 14 to the lower end 12T of the chuck part 12 and the gusset-shaped folding line of the side surface. , an inclined portion inclined at about 45° is formed toward the intersection of .
In addition, not only when the dimension L1 and the dimension L0 are substantially equal, but when the dimension L1≧the dimension L0, the side gusset 51 projects outward from the gusset bag body 11 as shown in FIG. When closing the opening 9, the front side area 53 of the right side 6, the front side 3, the front side 53 of the left side 7, and the rear side of the right side 6 are not obstructed by the four corner joints 14. The side region 54, the rear face portion 4, and the rear face region 54 of the left side face 7 can each extend in a straight line, so that the chuck portion 12 can be easily fitted and the opening 9 can be reliably closed, which is preferable. .

Further, according to the gusset bag body 10 with zipper, as shown in FIG. It is preferable to provide notch portions 12D as shown in FIG. By providing the notches at this position, the gusset bag body 11 can be easily bent, and the engaging protrusions 121 and 125, 121 and 121, and 125 and 125 are engaged with each other even at the bent portions. Thus, the gusset bag package 100 containing the contents can be formed in which the opening 9 can be closed substantially without gaps.

Further, according to the zippered gusset bag body 10, since the bottom gusset 21 is formed on the bottom surface portion 1, it is possible to increase the inner volume and improve the self-sustainability.

Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the contents of the above embodiments, and various changes may be made to each component within the scope of the present invention. , can be deleted, or the combination of each component can be changed beyond the embodiment.

For example, in the above embodiment, the chuck portion 12 has four rows of linear engagement projections 121 and 125, but the number of engagement projections 121 and 125 is limited to four rows. Instead, it may be configured to have three or more rows of engaging protrusions.
Further, in the above-described embodiment, the case where the chuck portion 12 is provided with the male engaging projections 121 and 125 facing each other has been described, but a female engaging projection may be applied. , it may not have a plurality of rows of engaging protrusions, and for example, a hook-and-loop fastener that does not distinguish between male and female may be used.
Examples of male-female hook-and-loop fasteners include "Multilock" made by Kuraray Fastening Co., Ltd., "Easylock" made by Aplix, and "Grip Lock Strip" made by 3M. In the case of a hook-and-loop fastener chuck portion having no sex distinction, which is composed of hooks and hooks, flexibility is superior to a chuck portion having a plurality of rows of engaging protrusions. Therefore, since the gusset bag can be easily folded without providing a cut portion in the chuck portion at the folded portion, the chuck portion does not hinder the folding of the gusset bag body, and the hooks are stably engaged with each other, thereby substantially closing the opening. It can be sealed without gaps. The chuck portion 12 may be arbitrarily set within a range in which the opening portion 9 can be opened and closed by engagement.

In the above embodiment, the zipper part 12 is formed with the notch 12D at the position corresponding to the bending position of the gusset bag body 11, but the notch 12D is formed at the position corresponding to the bending position. You can arbitrarily set whether or not to

Further, in the above-described embodiment, the case where the side joint portion 52 of the side surface 5 is shaped to protrude outward has been described, but the side joint portion 52 is formed in the front side area 53 or the rear side area of the side surface 5. 54 and may be fixed to the front side region 53 or the rear side region 54 by being partially or wholly joined at either position. Further, in the above embodiment, the case where the side joint portion 52 is formed on the side portion 5 has been described, but whether or not to form the side joint portion 52 on the side portion 5 may be set arbitrarily. A configuration in which the joint portion 52 is not formed may be adopted. Moreover, in the above-described embodiment, the case where the bottom portion 1 is provided has been described, but a configuration without the bottom portion 1 may be employed. For example, as shown in FIGS. 10(A) and 10(B), one of the cylindrical portions is a backing portion 42 in which the ends of a sheet of film are connected to each other without providing a side joint portion. It may be a cylindrical portion having a rectangular cross section provided on the flat portion of the . Furthermore, as shown in FIGS. 10A and 10B, a zippered gusset bag may be used in which the bottom is formed by folding the plane portion without providing the bottom portion.

Further, in the above embodiment, the case where the side surface portion 5 is connected to the bottom surface portion 1 via the folded portion 24 has been described, but whether the side surface portion 5 is connected to the bottom surface portion 1 via the folded portion 24 is determined. may be set arbitrarily, and the side portion 5 may be connected to the bottom portion 1 without the folding portion 24 interposed therebetween.

Alternatively, the side joint portion 52 may be folded over the side portion 5 and fixed to the side portion 5 at least partially.

Further, in the above-described embodiment, when the four corner joints 14 are formed only in a range below the lower end 12T of the chuck part 12 (bottom part 1 side), when only the so-called lower four corner joints are provided However, as shown in FIG. 12 , upper four-corner joints 15 that do not overlap the chuck portion 12 may be formed in a range above the upper end of the chuck portion 12 . In this case, by having the four corner joints 14 and 15 above and below the chuck portion 12 at the four corners, the folding positions of the four corners are made clearer, and it is easy to bend, and the position where the chuck portion 12 is fitted is ambiguous. It has an excellent appearance and can stand on its own stably.
In addition, although the area of the opening 9 is smaller than that of the zippered gusset bag body 10 according to the above-described embodiment by the upper four-corner joints 15, the upper four-corner joints 15 are formed up to the vicinity of the opening 9. This will give you more independence.
Moreover, it is preferable that the upper four corner joint portions 15 in the range above the upper end of the chuck portion 12 have dimensions equal to or smaller than the width dimension of the four corner joint portions 14 in the range below the lower end of the chuck portion 12 . In addition, by making the width as narrow as possible or gradually narrowing toward the opening 9, the bending position is clarified, the bending is easy, and the independence is improved. can be made wider. However, if the four corner joints 14 are formed continuously from top to bottom so as to overlap the chuck portion 12, the chuck portion 12 will melt at the position where the four corner joints 14 and the chuck portion overlap. When having multiple rows of engaging protrusions 121 and 125 as in the chuck portion 12 of the present embodiment, the amount of melted resin increases, and lumps of melted resin are formed inside the four corner joint portions 14, resulting in the chuck portion 12 may interfere with the sealing of the Therefore, it is preferable to form the four corner joints 14 below the chuck part 12 and form the upper four corner joints 15 above the chuck part 12 without overlapping the chuck part 12 .

In addition, it is possible to appropriately replace the components in the above-described embodiments with well-known components without departing from the scope of the present invention, and the above-described embodiments may be combined as appropriate.

1 bottom part 1A long side (first opposite side)
1B short side (second opposite side)
2 Flat part 3 Front part 4 Rear part 5 Side part 6 Right side part 7 Left side part 8 Cylindrical part 9 Opening part 10 Zippered gusset bag body 10B Flat bag 10L Boundary line 11 Gusset bag body 12 Zipper part 12C Notch 12D Notch part 14 Four corner joints 15 Upper four corner joints 20 Base part 21 Bottom gusset 22 Bottom joint 24 Folding part 51 Side gusset 52 Side joint 53 Front side area 54 Rear side area 55 Inclined joint 100 Gusset bag package

Claims (10)

A zippered gusset bag,
a pair of plane portions consisting of a front portion and a rear portion;
a pair of side surface portions connecting the front surface portion and the rear surface portion and forming a tubular portion having a rectangular cross section and having a gusset-like fold;
an opening formed at one end of the cylindrical portion;
four corner joints formed at the four corners of the cylindrical portion positioned at both widthwise end portions of the pair of flat portions and at both widthwise end portions of the pair of side surface portions;
a gusset bag having
a linear chuck portion formed in the circumferential direction of the cylindrical portion below the opening;
with
A zippered gusset bag body, wherein the four corner joints are formed in a range below the zipper part. The zippered gusset bag body according to claim 1,
A chuck characterized in that the dimension L1 from the lower end of the chuck portion to the upper end of the four corner joints is substantially equal to the dimension L0 from the width direction end of the side face to the gusset-shaped folding line. Gusseted bag body. The zippered gusset bag body according to claim 1,
When the dimension L1 from the lower end of the chuck portion to the upper end portion of the four corner joints and the dimension L0 from the width direction end portion of the side surface portion to the gusset-shaped folding line are:
A zippered gusset bag, characterized in that dimension L1≧dimension L0. A zippered gusset bag according to any one of claims 1 to 3,
In the side part,
A zippered gusset bag, characterized in that it has a lateral joining portion in which the front side area and the rear side area are joined in the vertical direction at the central part in the width direction of the side part. A zippered gusset bag according to any one of claims 1 to 4,
A zippered gusset bag body, wherein the zipper part has a notch at a position corresponding to a bending position of the gusset bag body. A zippered gusset bag according to any one of claims 1 to 5,
Further comprising an upper four-corner joint formed in a range above the chuck portion and not overlapping the chuck portion,
A zippered gusset bag characterized by: A zippered gusset bag according to any one of claims 1 to 6,
A zippered gusset bag, comprising a rectangular bottom portion provided at the other end of the cylindrical portion. A zippered gusset bag according to any one of claims 1 to 7,
The chuck part has an engaging projection part consisting of a plurality of rows of projections,
A zippered gusset bag, wherein the engaging protrusions have the same shape in the entire circumferential direction of the tubular portion. A zippered gusset bag according to any one of claims 1 to 7,
A gusseted bag with a zipper, wherein the zipper part is a hook-and-loop fastener that is indistinguishable between male and female. A gusset bag package in which contents are accommodated in the zippered gusset bag according to any one of claims 1 to 9.

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