JP2005104561A - Gusset bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gusset bag, of which an upper end outlet can be kept open widely upon opening the bag with a simple structure and by a simple opening operation, so that an article in the bag can be taken out easily smoothly. <P>SOLUTION: The gusset bag 10 comprises a pair of front/back front faces 14, and a pair of left/right side fold-in parts 15 which can be folded inside the front faces 14, respectively. The gusset bag 10 is made to stand by itself, and an upper end outlet 11 is opened to take a detergent out of the bag 10. A fin-like vertical rib 16, which is formed by folding outward thin vertically elongated portions 24 at both sides of a folding center line 19 on the side fold-in part 15 and gluing together the interior of the elongated portions 24, is formed at the center of each side fold-in part 15. The vertical rib 16, for example, can be formed easily by pinching the outwardly folded elongated portions 24 at the outside and welding together them. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gusset bag, and in particular, includes a pair of front and rear front portions and a pair of left and right side folds that can be folded inside the front portions, and opens the upper end outlet in a self-supporting state. The present invention relates to a gusset bag that can be taken out.

  A gusset bag is a bag comprising a pair of front and rear front portions formed from one or a plurality of sheet materials, and a pair of left and right side folding portions that can be folded into a V shape inside these front portions. Then, from the state where the side folding portion is folded and flatly folded, the folding portion in the vicinity of the opening is opened to form a rectangular upper end opening so that various items can be accommodated inside the upper end opening. It has become.

  Moreover, the use of the gusset bag has expanded by devising the sheet material which comprises this, the form of the said gusset bag, etc. And, for example, in a gusset bag that is commercialized in a state where powdery or granular detergent or the like is accommodated as a container, the container such as a detergent can be opened or closed by opening or closing the top outlet by folding or opening the side fold part. It can be taken out and used repeatedly.

In such a gusset bag from which the contents are repeatedly taken out, particularly when the gusset bag is used in a self-supporting state, the side face is opened when the upper outlet is opened in order to make it easy to take out the contents. It is desirable to keep the upper end extraction opening wide open against the V-shaped folds of the folding portion, and therefore open the upper end extraction opening large against the V-shaped folds. Various methods have been developed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 8-24495

  The gusset bag described in Patent Document 1 is attached so that the side folded portion protrudes outward when the side folded portion is folded, and the inner surface faces the side folded portion when the side folded portion is opened. In the state where the band-shaped opening band having the same length as the width of the side folding part is provided, and the gusset bag is folded, the opening plate is formed between the folded opening band and the side folding part. By inserting the body and rotating it approximately 90 degrees, the side folding part is held in an extended state, and the upper end outlet is greatly opened. And according to the gusset bag described in Patent Document 1, it is necessary to use a plate for opening separately for the operation of opening the upper outlet opening, and the configuration and opening operation become complicated, so a simpler configuration and It is desired to develop a gusseted bag that can maintain a large opening shape of the upper end outlet when opened by a simple opening operation.

  The present invention provides a gusset bag that can hold the opening shape of the upper end outlet at the time of opening with a simple configuration and a simple opening operation, and can easily and smoothly take out the stored items. The purpose is to do.

  The present invention includes a pair of front and rear front portions and a pair of left and right side folds that can be folded inside the front portions, and opens the upper end outlet in a self-standing state so that the contents can be taken out. In the side fold portion, the fins formed by folding the narrow vertically long portions on both sides sandwiching the folding center line outward in a mountain fold shape and joining these inner side surfaces to each other The above object is achieved by providing a gusseted bag in which a shaped vertical rib is provided in the central portion of the side folded portion.

  Here, when the side-folded portion is expanded, the strip-like vertical rib extends vertically along the central portion of the side-folded portion, and protrudes in an elongated strip shape or elongated fin shape toward the outside. Preferably, the narrow center regions on both sides along the folding center line when the side folding portion is folded so that the folding center line has a V-shaped cross section disposed at the tip are formed as the folding center line. As the sandwiched narrow vertical portion, the narrow vertical portion is folded back in a mountain shape on the V-shaped open side, and the inner surfaces of the narrow vertical portions on both sides that face each other by such folding are joined together. Therefore, it is easily formed. The strip-like vertical ribs may protrude into an elongated rectangular shape, or may protrude into an elongated triangular or trapezoidal shape, and the length that fits from the opening edge of the upper end outlet to the bottom of the bag. In addition, it can be provided only on the upper portion of the gusset bag effective for maintaining the opening shape of the upper end outlet.

  According to the gusset bag of the present invention, the opening shape of the upper outlet opening at the time of opening can be kept large with a simple configuration and a simple opening operation, and the stored items can be easily and smoothly taken out. I can go.

  A gusset bag 10 according to a first preferred embodiment of the present invention shown in FIGS. 1 and 2 is used as a container for storing a powdered detergent as a container, for example, and constitutes a detergent product. That is, according to the first embodiment, the gusset bag 10 is commercialized in a state in which, for example, a detergent is put into the interior and then the upper end outlet 11 is sealed. The upper end take-out port 11 is formed by cutting off the sealing portion of the upper end, and the detergent is repeatedly taken out from the upper end take-out port 11 and used. The mouth 11 is closed, and the stored detergent can be effectively stored. In addition, the gusset bag 10 of the first embodiment can easily keep the large opening state of the upper end outlet 11 when the detergent is repeatedly taken out, and can easily and smoothly take out the stored detergent. It is to make.

  The gusset bag 10 according to the first embodiment includes a pair of front and rear front portions 14 and a pair of left and right side fold portions 15 that can be folded inside the front portions 14. For example, a detergent bag container in which the mouth 11 is opened so that the stored detergent can be easily taken out with one hand while maintaining the opened state. The side folding portion 15 sandwiches the folding center line 19. A strip-like vertical rib 16 formed by folding the narrow vertically long portions 24 on both sides outward in a mountain fold shape and joining the inner side surfaces to each other is provided in the central portion of the side folding portion 15. .

  Further, according to the first embodiment, the fin-like vertical rib 16 extends downward from the opening edge of the upper end outlet 11 and has a length that fits from the opening edge to the bottom 21 of the bag. Is provided.

  According to the first embodiment, the gusset bag 10 is formed by using various known folding and joining processes on one or a plurality of sheet materials (film materials) 22 cut into a predetermined shape designed in advance. , A bag container that contains a detergent and is surrounded by a rectangular bottom portion 21, a pair of front and rear front portions 14 and a pair of left and right side folding portions 15 that are erected from each side portion of the bottom portion 21. As a gusset bag container comprising a body portion 12 constituting the main body portion and a take-out port portion 13 that is continuously disposed integrally with the upper portion of the body portion 12 and folded back when the gusset bag 10 is closed. Is formed. Further, the gusset bag 10 is configured so that the upper half portion of the pair of left and right side side folding portions 15 is folded inwardly in a V shape after a predetermined amount of a powdery detergent as a container is put through the upper end outlet 11. On the other hand, the upper end outlet 11 is sealed with, for example, a top seal so that the detergent 16 that has been charged is sealed inside, and the outlet 13 that is an unaccommodated portion of the detergent is folded back, and the detergent product Will be commercialized.

  Further, according to the first embodiment, a multilayer sheet including an aluminum foil layer is used as the sheet material 22 constituting the gusset bag 10, and preferably, for example, the first layer as the outermost layer is polyester, A multilayer sheet having a five-layer structure in which two layers are polyethylene, the third layer is aluminum foil, the fourth layer is polyethylene, and the fifth layer, which is the innermost layer, is a sealant layer can be used. The thickness of the aluminum foil layer in the multilayer sheet is preferably 5 to 50 μm, and more preferably 5 to 20 μm. By using a multilayer sheet including an aluminum foil layer as the sheet material 22, it is possible to facilitate a folding operation when resealing (resealing), and it is difficult for wrinkles or the like to occur in the bag, and the gusset bag 10 It becomes possible to maintain a good appearance.

  Furthermore, according to the first embodiment, the sheet folded so as to face the inner sealant layer along the four standing edges 17 where the front portion 14 and the side folded portion 15 of the gusset bag 10 are connected. The folded portion of the material 22 is sandwiched from the outside using, for example, a seal bar and heat-sealed to provide a hem seal portion 23 having a seal width of, for example, about 3 to 20 mm, preferably about 5 to 10 mm. By providing the hem seal portions 23 along the four vertical sides 17 of the gusset bag 10, the shape retention property of the gusset bag 10 is improved and the appearance is improved, and the opening retention property of the upper end take-out port 11 is improved. Can be complemented.

  Furthermore, according to the first embodiment, for example, the longitudinal linear member 18 that can be plastically deformed is sandwiched between the folded portions when the hem seal portion 23 is formed. It is attached with the length which straddles the trunk | drum 12. The plastically deformable longitudinal linear member 18 is made of, for example, a metal wire, a plate, a narrow plate, a mesh, a ribbon, or a shape memory alloy, a shape memory resin, etc. It is a linear member that can be bent and deformed and has plastic deformability to such an extent that the shape after bending can be easily maintained, and when the gusset bag 10 is closed by folding the take-out port 13 (see FIG. 2), and has a shape-retaining rigidity at the time of plastic deformation that resists the folding restoring force of the sheet material 22 of the take-out port 12 and can stably hold the folded state of the take-out port 13. Therefore, when the longitudinal linear member 18 is provided along the upright side 17 of the gusset bag 10, the side folding portion 15 is brought inward when the upper end outlet 11 is opened and then closed again. As shown in FIG. 2, the sheet material 22 of the take-out port 13 is folded back together with the longitudinal linear members 18 while overlapping the upper ends of the pair of front surface portions 14 in the upper-end take-out port 11 while closing and closing the upper end take-out port 11. The gusset bag 10 can be easily and reliably closed by a simple operation of folding back downward along the line 20.

  According to the first embodiment, as the longitudinal linear member 18, a metal wire having a thickness of, for example, 0.1 to 5.0 mm, preferably 0.3 to 1.0 mm, is covered with the coating resin. Can be used. Here, as the coating resin, for example, a polyolefin resin, a vinyl chloride resin, a polyester resin, a polyamide resin, or the like can be used. For example, the wire is covered with a thickness of about 0.05 to 5.0 mm. be able to. It is possible to substantially increase the thickness (diameter) of the wire and improve the bending strength of the longitudinal linear member 18 by using the longitudinal linear member 18 covered with a coating resin. At the same time, it is possible to increase the bending radius when the longitudinal linear member 18 is bent, and to effectively improve the repeated bending durability. Further, the coating resin preferably covers a metal wire with a wide flat shape, which makes it possible to improve the handleability of the longitudinal linear member 18.

  According to the first embodiment, the strip-like vertical ribs 16 extending downward from the upper end outlet 11 and projecting outward at the central portion of each side folding portion 15 are preferably gusseted bags 10. Then, the narrow vertically long portions 24 that are narrow regions on both sides along the folding center line 19 of the side fold portion 15 that is folded into a V-shaped cross section are formed in a mountain fold shape on the V-shaped open side. The inner surface of the narrow vertically long portion 24 made of the above-mentioned sheet material 22 is disposed so as to face each other while being folded and heat-sealed by, for example, heat sealing while simultaneously sandwiching the pair of narrow vertically long portions 24 from the outside. The (sealant layer) is joined and integrated with each other, and easily and easily shaped into an elongated strip having a length of about 5 to 10 mm, for example, with a length that fits from the opening edge of the upper end outlet 11 to the bottom 21 of the bag. It is is will be.

  As described above, the gusset bag 10 of the first embodiment is commercialized as a detergent product in a state in which a powdery detergent is sealed, and the user cuts off the sealing portion at the upper end and opens the upper end outlet 11. However, according to the gusset bag 10 of the first embodiment, when the detergent is taken out, the upper outlet opening 11 is held in a large open state by the simple operation. It becomes possible to keep. That is, according to the first embodiment, the side fold portion 15 of the gusset bag 10 has the fin-like vertical ribs 16 formed by folding the narrow vertically long portions 24 outward in a mountain fold shape and joining them. Since it is provided in the center portion, when opening the upper end outlet 11, the folded side fold portion 15 is opened, for example, the portion provided with the strip-like vertical ribs 16 is picked by hand, and can be easily The strip-like vertical ribs 16 of the side folds 15 are formed against the V-shaped folds of the side folds 15 centered on the fold center line 19. The return to the V-shape is effectively prevented as a state in which the crease is crushed, whereby the top outlet 11 is opened in the same size and shape as the bottom 21 when the detergent is taken out. To be in a state It is possible to easily held.

  Therefore, according to the gusset bag 10 of the first embodiment, the opening shape of the upper end outlet 11 at the time of opening can be largely maintained by a simple configuration and a simple opening operation, and the contained detergent It can be taken out easily and smoothly.

  FIG. 3 shows a gusset bag 30 according to the second embodiment of the present invention. According to the gusset bag 30 of the second embodiment, the gusset bag 30 is provided so as to protrude outward from the central portion of each side folding portion 15. The strip-like vertical ribs 31 extend downward from the upper end outlet 11 and are formed in a triangular elongated fin shape, and are provided only in the substantially upper half portion of the gusset bag 30. Similar to the fin-shaped vertical ribs 16 in the first embodiment, the triangular fin-shaped vertical ribs 31 have a triangular shape that is folded back into a mountain fold shape at the upper half portion of the side folding portion 15, for example. It can be easily formed by sandwiching the narrow vertically long portion 32 from the outside and joining and integrating these inner side surfaces by heat fusion.

  And also by the gusset bag 30 of the above-mentioned 2nd Embodiment, the return of the side fold part 15 to the V-shape is effectively prevented by the action of the band-like vertical ribs 31 as a state where the folds are crushed. It becomes possible, and there exists an effect similar to the gusset bag 10 of the said 1st Embodiment. Further, according to the gusset bag 30 of the second embodiment, the strip fin-like vertical rib 31 has a triangular shape whose width becomes narrower downward, and the side surface at the opening edge when the upper end outlet 11 is opened. Since the width L1 of the folded portion 15 is smaller than the width L2 of the side folded portion 15 at the lower end of the strip fin-like vertical rib 31, the large opening state of the upper end take-out port 11 can be more effectively maintained. It becomes possible.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the sheet material constituting the bag is not necessarily a multilayer sheet having the above-described configuration including an aluminum foil layer, and may be a sheet material not including an aluminum foil layer or a single-layer sheet material. For example, sheet materials such as polyolefin resin, vinyl chloride, polyester resin, and polyamide resin can be used in a single layer or multiple layers. In addition, the container to be stored is not necessarily a powdery detergent, and is used as a bag container for storing various other containers such as liquid containers such as shampoo and rinse, and solid containers such as confectionery. You can also Further, the gusset bag is not necessarily provided with a hem seal portion or a longitudinal linear member capable of plastic deformation.

  Furthermore, the strip-like vertical ribs do not necessarily have to be formed by joining the narrow and long portions after the gusset bag is formed, and are previously formed at a predetermined position of the sheet material before the gusset bag is formed. You can also. Further, it is not always necessary to provide the strip-like vertical rib extending downward from the opening edge portion of the upper end outlet, and it is possible to appropriately select and provide a position where the above-described effects are exhibited.

It is a perspective view which shows the gusset bag which concerns on 1st Embodiment of this invention. It is a perspective view which shows the gusset bag which concerns on 1st Embodiment of this invention in the state which turned up and took out the opening part. It is a perspective view which shows the gusset bag which concerns on 2nd Embodiment of this invention.

Explanation of symbols

10, 30 Gusset bag 11 Upper outlet port 12 Body portion 13 Outlet port portion 14 Front surface portion 15 Side fold portion 16 Strip fin-like vertical rib 17 Vertical side 18 Vertical linear member 19 Folding center line 20 Folded portion 21 Bottom portion 22 Sheet material 23 Hem seal part 24 Narrow vertical part

Claims (4)

A gusset bag that has a pair of front and rear front parts and a pair of left and right side folds that can be folded inside the front parts, and that opens the top outlet in a self-standing state so that the contents can be taken out. There,
The side-folded portion has strip-shaped vertical ribs formed by folding the narrow vertically long portions on both sides across the folding center line outwardly in a mountain fold shape and joining the inner side surfaces to each other. Gusset bag provided at the center of the folding part. The gusset bag according to claim 1, wherein the strip-like vertical rib is provided extending downward from an opening edge of the upper end outlet. The gusseted bag according to claim 2, wherein the strip-like vertical rib is provided with a length that fits from an opening edge of the upper end outlet to a bottom of the bag. Formed by using a sheet material having a sealant layer as the innermost layer, the narrow vertically long portions folded back in a mountain fold shape are sandwiched from the outside and heat-sealed so that the inner surfaces of the narrow vertically elongated portions are joined together. The gusset bag according to any one of claims 1 to 3.

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