JP5280103B2 - Bag-like body with gusset and method for producing the same - Google Patents

Description

  The present invention relates to a gusseted bag-like body and a method for manufacturing the gusseted bag-like body, and the gusseted bag-like body is used for storing various types of wrapping bags such as files, insertion bags for book covers, handbags, shopping bags, bags, pouches, etc. Can be used as a bag.

  The gusseted bag-like body has a handbag used in a retail store. As shown in FIGS. 12A and 12B, the conventional handbag 1 is folded from the center fold of the thermoplastic polymer film, Fold into the film, heat seal the edge 2 on both sides with a fusing seal, and weld the bottom side to the front side and the fold side and cut at 45 ° to form a beveled edge 3 on the gusset to form a handbag . FIG.12 (b) has shown the state which opened the handbag in square shape (refer patent document 1).

Japanese Patent Laid-Open No. 1-220229 (full description, drawings)

  Conventional gusseted bags are made of thermoplastic polymer film and are used as handbags for disposable shopping. This type of bag is not intended to have a clear gusset on the side of the bag. In addition, the design is not preferable. Further, as shown in FIG. 12C, this type of handbag is not preferable in terms of appearance because the bottom portion protrudes downward when the object is stored in the bag. In order to prevent such downward protrusion, it is necessary to use a cardboard board or the like laid on the inner bottom portion of the handbag, which has a disadvantage of increasing costs.

  In addition, the gusseted bag-like body produced by this handbag manufacturing method cannot form a clear gusset, and is a manufacturing method unsuitable for uses other than one-time disposable shopping bags, and has a relatively thick film. However, there is a problem in the formation of the bottom, and the conventional manufacturing method is not preferable for a bag manufacturing method using a thick film, and a file that requires a design, a bag for inserting a book cover, a bag, a pouch, etc. However, there is a problem with this manufacturing method, and a manufacturing method that can be manufactured with a simple manufacturing process has been desired.

  The present invention has been made in view of the problems as described above, and can be formed into a bag-like body by a relatively simple manufacturing process, has excellent design, and can be developed into various bags. It aims at providing a body and its manufacturing method.

The present invention achieves the above-mentioned problems, and the invention of claim 1 is a method for producing a gusseted bag-like body,
A first welding step in which one side is a single-sided sheet from the center of the two laminated thermoplastic resin films, the other is a half-sided sheet, and the single-sided sheets are welded together at a U-shaped welded portion;
A folding step of folding back each of the half-side sheets to the one-side sheet in which a U-shaped welded portion is formed;
A heat shielding step for thermally shielding the outer edges on both sides of the one side sheet facing each other;
After the heat shield process, the folded outer edge welded portion by thermally welding together the people on both sides of the outer edge of each of said surface half side sheet and the one surface side sheet together superimposed folded back by step And forming a gusseted bag-like body having the unilateral sheet as the gusset and the half sheet as the surface by the second welding step to be formed. It is a manufacturing method of the bag-like body with a gusset to do.

  According to a second aspect of the present invention, prior to the first welding step, a lid for covering the opening of the gusseted bag-like body is welded to one side of the half sheet, or the film The bag-like body with gussets according to claim 1, wherein a cover sheet of a book cover is used on one side, and the first welding step, the folding step, the heat shielding step, and the second welding step are performed. It is a manufacturing method.

The invention according to claim 3 is the method for producing a gusseted bag-like body according to claim 1, wherein a plurality of punched holes are formed in one of the half sheet.

The invention according to claim 4 is the method for producing a gusseted bag-like body according to claim 1, characterized in that the gusset-like bag-like body is provided as a file in which a plurality of storage portions are provided.

The invention of claim 5 is a gusseted bag-like body made of two thermoplastic resin films.
The both films are composed of a single-sided sheet and a half-sided sheet folded from the center, the single-sided sheets face each other, and the two half-sided sheets are on the surface side of the gusseted bag-like body, The two single-sided sheets are connected by a U-shaped welded portion, and the outer edge of the single-sided sheet and the outer edge of the half-sided sheet that are the same film of the two films are connected by an outer edge welded portion. A gusseted bag-like body characterized in that it is a gusseted and gusseted bag-like body having both the single-sided sheets as the gusset and the bottom.

  The invention according to claim 6 provides a cover for covering the opening of the gusseted bag-like body on either one of the half-side sheets, or one of the half-side sheets as a cover sheet for a book cover. The gusseted bag-like body according to claim 5.

The invention of claim 7 is characterized in that a plurality of punched holes are formed in any one of the half-side sheets of the gusseted bag-like body, or an adhesive surface is provided. It is a bag-like body.

The invention according to claim 8 is the bag-like body with gussets according to claim 5, wherein the gusset-like bag-like bodies are connected to form a file having a plurality of storage portions.

  Further, the invention of claim 9 is characterized in that another film is laminated on the film in the vicinity of the opening of the gusseted bag-like body or a folded portion is provided. Is the body.

In the invention of claim 1, in the manufacturing method of the gusseted bag-like body, one is a single-sided sheet from the center of the two laminated thermoplastic resin films, the other is a half-sided sheet, and the single-sided sheets are U-shaped. A first welding step in which welding is performed at the shape-like welded portion, a folding step in which each of the half-side sheets is folded back to the one-sided sheet in which a U-shaped welded portion is formed, and outer edges on both sides where the one-sided sheets face each other a heat shielding step of heat shield, after the heat shielding step, collectively respective outer edges of both sides of the folding the half-side sheet and the one side sheet superimposed is folded by steps facing each other A gusseted bag having a gusset as the one-side sheet and a half-side sheet as the surface, respectively, which are welded in the first and second welding steps by a second welding step in which an outer edge weld portion is formed by heat welding. Since it is a manufacturing method of a gusseted bag-like body characterized by forming a body, it is possible to manufacture a gusseted bag-like body in two welding steps, and does not require an inside-out process after welding Therefore, there is an advantage that automation is easy. Also, the inner sheet part of the U-shaped welded part can be cut at the time of welding, the side edge piece of the U-shaped welded part of the gusseted bag-like body is made into a gusset, and the bottom part continuing to the gusset is formed in a beam shape The bottom of the bag-like body can be increased by the beam-like bottom, and the side edge pieces and the beam-like bottom are formed in a rib shape in the bag, and this gusset and the beam-like bottom are used as a partition. It is possible to sort and store booklet-shaped materials and the like, and various storage forms can be provided. In other words, this gusseted bag-like body can easily produce not only files and storage bags, but also a book cover having a bag, a pouch or other design that requires design, or a book cover having an insertion bag. There are advantages you can do.

  Moreover, in invention of Claim 2, before the said 1st welding process, the cover body for covering the opening part of the said gusseted bag-like body is welded to one side of the said half surface side sheet | seat, or the said film The bag-like body with gussets according to claim 1, wherein a cover sheet of a book cover is used on one side, and the first welding step, the folding step, the heat shielding step, and the second welding step are performed. Therefore, if a cover is provided on one of the thermoplastic resin films, a bag or a pouch can be manufactured. Also, by using a cover sheet on one of the thermoplastic resin films, a gusseted bag The book cover provided with the shape can be manufactured, and this manufacturing method has an advantage that it can be developed for various uses.

Moreover, in invention of Claim 3, since it is a manufacturing method of the bag-like body with a gusset of Claim 1 which forms a several punching hole in one side of the said half surface side sheet | seat, covers, such as a book There is an advantage that when the gusseted bag-like body is bonded to the back surface of the paper, the paste can be punched into the hole and firmly bonded, and can be easily attached to an existing book, notebook, booklet or the like.

According to a fourth aspect of the present invention, the gusseted bag-like body manufacturing method according to claim 1, wherein the gusseted bag-like body is provided as a file in which a plurality of storage portions are provided. There is an advantage that a file made of a plurality of gusseted bags is easy to manufacture.

  Further, in the invention of claim 5, in the gusseted bag-like body made of two thermoplastic resin films, the two films are composed of a single-sided sheet and a half-sided sheet folded from the center, and the two single-sided sheets are Facing each other and the both half-side sheets are on the surface side of the gusseted bag-like body, and the both facing one-side sheets are connected by a U-shaped welded portion, and the two films are the same film A gusseted gusset characterized in that the outer edge of the single-sided sheet and the outer edge of the half-sided sheet are connected by an outer edge welded portion, and is a gusseted bag-like body with the two single-sided sheets as the gusset and bottom. Since it is a bag-like body, by cutting the inner sheet part of the U-shaped welded part at the time of welding, the side edge piece of the U-shaped welded part of the gusseted bag-like body is made gusset, and the bottom part that continues to the gusset is a beam Can be formed into a beam The bottom portion of the bag-like body can increase the strength of the bag-like body, and the side edge pieces and the beam-like bottom portion are formed in a rib shape in the bag, and the gusset and the beam-like bottom portion can be used as a partition. It is possible to sort and store booklet materials and the like, and to provide various storage forms. That is, this gusseted bag-like body can be used not only as a file or a storage bag, but also as a book cover having a bag, a pouch, or a bag that requires a design, or a bag for insertion by providing a lid. There is.

  In the invention of claim 6, a lid that covers the opening of the gusseted bag-like body is provided on either one of the half-side sheets, or one of the half-side sheets is used as a cover sheet for a book cover. Since it is a bag-like body with a gusset according to claim 5, if a lid is provided on one side, the bag-like body with a gusset can be easily put into a bag or pouch, There is an advantage that the body can be provided on the book cover.

Further, in the invention of claim 7, a plurality of punched holes are formed in any one of the half-side sheets of the gusseted bag-like body, or an adhesive surface is provided. Since it is a bag-like body, adhesive can be applied to the facing pages of booklets such as existing books and notebooks, and the sheet surface on the punched hole side can be attached to provide a gusseted bag-like body, and the adhesive layer is stamped There is an advantage that the bag-like body with a gusset can be firmly stuck into the hole.

The invention according to claim 8 is a file with a gusseted gusset according to claim 5, wherein the gusseted gusset is formed into a file in which a plurality of storage portions are provided. There is an advantage that it can be used as a storage bag for sorting and organizing materials.

  Moreover, in invention of Claim 9, another film is laminated | stacked on the film of the opening part vicinity of the said gusseted bag-like body, or a folding part is provided, The gusseted bag shape of Claim 5 characterized by the above-mentioned. Since it is a body, it is possible to increase the thickness of the film on the opening side of the bag, and it is easy to use, and there is an advantage that a hand hole can be provided in this laminated or folded portion.

  Embodiments of a gusseted bag according to the present invention and a method for manufacturing the same will be described below with reference to the drawings. 1 to 3 are perspective views showing an embodiment of the gusseted bag-like body of the present invention, FIG. 1 is a bag-like body provided with a storage portion in the longitudinal direction, and FIG. 2 is a partially cutaway portion. FIG. 3 shows a bag-like body in which a folded portion is provided at an end portion on the opening side of the bag-like body, and FIG. 3 shows a bag-like body having a longitudinal direction as a storage port. 4-6 is a figure which shows embodiment of the manufacturing method of a bag-like body with a gusset of this invention, Fig.4 (a) is a top view, The same figure (b) is a perspective view which shows a 1st welding process. It is. FIGS. 5A to 5C are diagrams showing a folding process after the first welding process. 6A and 6B are perspective views showing a second welding process of the side edge. 7 (a) and 7 (b) are perspective views of gusseted bag-like bodies according to other embodiments. FIGS. 8A and 8B are perspective views of an embodiment in which a book carver is provided with a gusseted bag-like body. FIG. 9 is a perspective view showing an embodiment in which a lid is provided with a gusseted bag-like body. FIG. 10 is a perspective view showing an embodiment in which gusseted bags are continuously provided. FIG. 11 is a perspective view of an embodiment in which a gusseted bag-like body is a handbag.

  With reference to FIG. 1, embodiment of the bag-like body with a gusset which concerns on this invention is described. The gusseted bag-like body 5 in the figure is composed of two thermoplastic resin films 6 and 7, each of which is composed of a single-side sheet and half-side sheets 6a and 7a bent from the center. Thus, the single-sided sheets face each other and are welded at the U-shaped welded portion 8 to be connected to each other. One side sheet of the film 6 is the outer edge of the U-shaped welded portion 8 and the bottom edge piece 6c connecting the side edge pieces 6b to the outer edge of the U-shaped welded portion 8, and the one side sheet of the film 7 is the outer periphery of the U-shaped welded portion 8 Each side edge piece 7b and the bottom edge piece 7c connecting the both side edge pieces 7b, each one-side sheet has a U-shape, and the half-side sheets 6a, 7a of the films 6, 7 are gusseted bags. It is the surface side of the body.

The single-sided sheet of the film 6 has a U-shape with both side edge pieces 6b and the bottom edge piece 6c. Similarly, the single-sided sheet of the film 7 has a U-shape with both side edge pieces 7b and the bottom edge piece 7c. and exhibits, facing U-shaped one-side side sheet between the film 6 and 7 with each other, the inner edge sides 7 ₁ of both side edges piece 6b of the inner side ₆₁ and opposite side edges piece _7b, and Sokoenhen 6c inner sides of 6 ₂ and Sokoenhen 7c inner sides 7 ₂ is s welded respectively to form a U-shaped welded portion 8. And the outer edge 7 ₃ half-side sheet 7a of the outer sides 7 ₃ and the film 7 of the outer edge 6 _3, and both side edges piece 7b of the half side sheets 6a of the outer edge sides 6 ₃ and the film 6 of the opposite side edges piece 6b The outer edge welded portion 9 is welded to each other to form the gusset 10 by connecting the side edge pieces 6b and 7b with the U-shaped welded portion 8 and the outer edge welded portion 9, and the bottom edge piece 6c inner sides 6 ₂ and Sokoenhen 7c of the inner edge sides 7 ₂ Togaotto s welded bottom edge pieces 6c, beam-like bottom by 7c (hereinafter referred to as beam-shaped bottom portion) 11 is formed. The gusseted bag-like body 5 has a storage portion having gussets 10 and a beam-like bottom 11 with the half-sheets 6 a and 7 a of the films 6 and 7 as the surface.

  The embodiment of FIG. 2 has substantially the same configuration as the gusseted bag-like body 5 of FIG. 1, and is provided with folded portions 6f, 7f on the opening end sides of the half-side sheets 6a, 7a of the gusseted bag-like body 5. By providing the folded-back portions 6f and 7f on the opening end side, thickness is given to the storage opening of the half-side sheets 6a and 7a to increase the strength, and the touch due to the thickness is improved, and the opening of the storage opening is provided. Becomes easy. The folded portions 6f and 7f may have a configuration in which film pieces are laminated on the edge portions of the half-side sheets 6a and 7a. Moreover, in the embodiment of FIGS. 1 and 2, the storage portion of the gusseted bag-like body is formed in the longitudinal direction, whereas in the embodiment of FIG. 3, the storage port is in the longitudinal direction. This is a bag-like body 5 with gussets on which the half-side sheets 6a, 7a of 6, 7 are used as the surface, and a storage part is formed by the gusset 10 and the beam-like bottom part 11.

Next, an embodiment of a method for producing the gusseted bag-like body 5 according to the present invention will be described with reference to FIGS. As shown in FIG. 4A, two stacked thermoplastic resin films 6 and 7 are prepared and sent to a welding machine. In order to enable continuous production, two wide thermoplastic resin films wound around a roll may be stacked and sent out sequentially, or a wide thermoplastic resin film may be folded and sent out sequentially. Also good. Moreover, Fig.4 (a) has shown the U-shaped welding part 8 performed at the welding process performed at the following process to the thermoplastic resin films 6 and 7 with the dashed-dotted line, and the bending parts 6e and 7e are shown with the dashed-two dotted line. . FIG. 4 (b) shows a welding process or a welding cutting process. Two stacked thermoplastic resin films 6 and 7 are sent to the welding machine, and the stacked films 6 and 6 are cut by a cutting blade and a welding head provided in a U-shape. A sheet on one side is welded and cut into a U shape from the center of the sheet 7, and inner peripheral edge portions 6d and 7d in the U-shaped welded portion 8 shown in FIG. 4A of the films 6 and 7 are cut from the sheet on one side. The U-shape is formed on the single-sided sheet from the center of the films 6 and 7. In this welding step, a U-shaped U-shaped welding portion 8 side edges 6b, inner sides ₆₁ of 7b, _{7 1} and bottom part 6c, the inner edge sides ₆ 2 7c, _{7 2} by welding the It is formed. One side sheet of films 6 and 7 is side edge piece 6b 7b are welded and connected at the inner edges 6 ₂ , 7 ₂ . The U-shape represents the shape of the bottom edge portions 6c and 7c between the side edge portions 6b and 7b and the ends of the side edge portions 6b and 7b. Moreover, it is good also as only welding, without cutting off the inner peripheral edge parts 6d and 7d in the U-shaped welding part 8 depending on a use.

Subsequently, after the welding step, the process proceeds to the folding step of FIG. In the folding step, as shown in FIG. 5 (a), the half-side sheets 6a and 7a are opened from the center of the films 6 and 7 welded at the U-shaped welded portion 8 as shown by the arrow Y, and turned back. , 7 is folded and overlapped on the single-sided sheet on which the U-shaped welded portion 8 is formed (FIGS. 5B and 5C). Subsequent to the folding process, the process proceeds to the welding process of the outer edge welding portion 9 shown in FIGS. 6 (a) and 6 (b). In FIG. 6A, the half-side sheets 6a and 7a of the films 6 and 7 are welded to the outer edge sides 6 ₃ and 7 ₃ of the single-sided sheet, and the outer edge welded portion 9 is formed. A heat shielding process is performed before performing this welding process. Heat shield step is a step of inserting a heat shield plate 12 between the outer edge sides 6 ₃ and U-shaped sheet edge sides 7 ₃ of the film 7 of the U-shaped sheets of film 6, then the process proceeds to the welding process The films 6 and 7 are pressed by the welding head as indicated by an arrow A, and the opposite side sheet 6a of the film 6 and the outer edge side 6 ₃ of the single-sided sheet as shown in FIG. the outer edge 7 ₃ side sheet 7a and the one surface side sheet welded, on both sides of the outer edge welded portion 9 of the gusset bag-like body 5 is formed respectively. Through this welding process, the half sheets 6a and 7a of the films 6 and 7 are used as the front surface, the side edge pieces 6b and 7b of the single sheet are set as the gusset 10, and the bottom edge pieces 6c and 7c are set as the beam-shaped bottom portion 11. A gusseted bag-like body 5 having a portion formed therein is formed.

The gusseted bag-like body 5 of the present embodiment can be in various forms as shown in FIGS. The gusseted bag-like body 51 in FIG. 7A is obtained by forming a plurality of punched holes 12 in the half sheet 6 a of the film 6, and the punched holes 12 are formed in the half sheet 7 a of the film 7. Absent. Moreover, it is the same as that of the said embodiment that the side edge part of a U-shaped single side | surface sheet | seat is made into the gusset 10, and the storage part which made the bottom edge part of the single side | surface side sheet | seat the beam-like bottom part 11 is formed. In FIG. 7 (a), the half-side sheet 6a in which the punched hole 12 of the gusseted bag-like body 51 is formed is inserted into the back side of a cover of a book or booklet or a facing page and adhered to the adhesive attached to the facing page. Then, the gusseted bag-like body 51 is provided in a book, a booklet or the like.

Further, gusset bag-like body 5 ₂ in FIG. 7 (b) was coated an adhesive half side sheets 7a of the film 7 is obtained by attaching a release paper 13 in this coated surface, a release paper 13 peeled exposed adhesive coated surface of the half-side sheet 7a, similarly to the gusseted bag-like body 5 ₁ of FIG. 7 (a), attaching the coated surface on the back side or dial page cover of such books and booklets it allows to use a gusseted bag-like body 5 ₂ provided on the existing books and cover plug portion 14 the booklet or the like.

Also, book cover 14 of FIG. 8 (a), (b) is intended to provided the gusseted bag-like body 5 ₃ or ₄ by bending both sides of the cover sheet 14a on one welding the cover insertion portion 14b Yes, a cover such as a booklet is inserted between the cover sheet 14a and the cover insertion portion 14b. In FIG. 8 (a), one of the gusset bag-like body 5 ₃ cover sheet insertion portion 14b with serving as a cover insertion portion 14b corresponds to half the side sheets 7a. By the same manner as described above manufacturing method, are integrally formed gusset bag-like body 5 ₃ through an edge of the pre-cover sheet 14a in the portion to cover the insertion portion 14b in the U-shaped welded portion 8, then bag gusseted shaped body 5 ₃ parts I weight by bending the cover sheet 14a of which is provided, by welding the side edges across the heat shield plate between the side edges of each of the cover insertion portion 14b and the half-side sheets 6a forms an outer edge welded portion 9, to form a book cover 14 comprises a gusseted bag-like body 5 _3. Further, when formed integrally with the cover insertion portion 14b and the gusseted bag-like body 5 _3, as shown in FIG. 8 (a), the may be cuts shallowly, the U-shaped welded portion 8 as in the above You may form so that it may be cut deeply. In this case, a small storage portion 15 is newly formed between the cover insertion portion 14b and the single-sided sheet 6b. The small storage unit 15 is convenient for storing sheet-like printed materials and photographs. Further, the book cover 14 of FIG. 8B is formed by leaving the inner sheet portion of the U-shaped welded portion 8 without cutting away and forming a small storage portion 15 deeper than the small storage portion 15 of FIG. 8A. It is.

Figure 9 is a gusseted bag-like body 5 _4, 5 ₅ accommodating opening forming a housing portion that two continuously provided toward the same direction, provided the lid 15a provided with a Velcro 15b on the housing part, the lid The bag 15 has a storage opening that can be freely opened and closed by a body 15a. Further, a plurality of gusseted bag-like bodies may be provided. The bottom of the bag 15, gusseted bag-like body 5 _4, 5 and the beam-shaped bottom 11 of ₅ is provided on the bottom beam-shaped bottom portion 11 strength is provided by the bottom be such bulges downward by stored items There is no. Further, as shown in FIG. 10, it is also possible to use a plurality of gusseted bag-like bodies 5 connected in the same direction as a file without providing the lid 15a as shown in FIG. . Further, FIG. 11 shows the gusseted bag-like body 5 shown in FIG. 2 as a handbag 16, and the foldable portions 6 f and 7 f of the gusseted bag-like body 5 shown in FIG. is there.

  As an application example of the present invention, the gusseted bag-like body can be used as various storage bags in the form of bags such as files, insertion bags for book covers, handbags, shopping bags, bags, pouches, etc. it can.

It is a perspective view which shows one Embodiment of a bag-like body with a gusset of this invention. It is a perspective view which shows the other form of this embodiment. It is a perspective view which shows the other form of this embodiment. 1 shows one step of an embodiment of the manufacturing method of the gusseted bag-like body of FIG. 1, (a) is a plan view, and (b) is a perspective view showing a first welding step. (A)-(c) is a figure which shows the folding | returning process following the welding process of FIG. (A), (b) is a perspective view which shows the 2nd welding process following the folding process of FIG. (A), (b) is a perspective view of the gusseted bag-like body of other embodiment, respectively. (A), (b) is a perspective view of embodiment which provided the bag-like body with a gusset in the book carver. It is a perspective view which shows embodiment which used the bag-like body with a gusset as a bag. It is a perspective view which shows embodiment which connected the bag-like body with a gusset and used it as a file. It is a perspective view of an embodiment which used a bag-like body with a gusset as a handbag. (A)-(c) is the perspective view which showed the handbag which is a conventional gusseted bag-like body.

Explanation of symbols

5 Bag-like body with gusset 6,7 Thermoplastic resin film 6a, 7a Half side sheet 6b, 7b Side edge piece 6c, 7c Bottom edge piece 6 ₁ , 6 ₂ , 7 ₁ , 7 ₂ Inner edge 6 ₃ , 7 ₃ Outside Edge 8 U-shaped welded portion 9 Outer edge welded portion 10 Machi 11 Beam-shaped bottom (beam-shaped bottom)
12 Punching hole 13 Release paper 14 Book cover 15 Bag 15a Lid 15b Velcro 16 Handbag 16a Opening hole

Claims (9)

In the manufacturing method of the gusseted bag,
A first welding step in which one side is a single-sided sheet from the center of the two laminated thermoplastic resin films, the other is a half-sided sheet, and the single-sided sheets are welded together at a U-shaped welded portion;
A folding step of folding back each of the half-side sheets to the one-side sheet in which a U-shaped welded portion is formed;
A heat shielding step for thermally shielding the outer edges on both sides of the one side sheet facing each other;
After the heat shield process, the folded outer edge welded portion by thermally welding together the people on both sides of the outer edge of each of said surface half side sheet and the one surface side sheet together superimposed folded back by step And forming a gusseted bag-like body having the unilateral sheet as the gusset and the half sheet as the surface by the second welding step to be formed. A method of manufacturing a gusseted bag-like body.   Prior to the first welding step, a lid for covering the opening of the gusseted bag-like body is welded to one of the half-side sheets, or a book cover cover sheet is used for one of the films. The method for producing a gusseted bag-like body according to claim 1, wherein the first welding step, the folding step, the heat shielding step, and the second welding step are performed. The manufacturing method of the gusseted bag-like body according to claim 1, wherein a plurality of punched holes are formed in one of the half-surface sheets. 2. The method for producing a gusseted bag-like body according to claim 1, wherein the gusseted bag-like body is provided as a file in which a plurality of storage portions are provided. In a gusseted bag-like body made of two thermoplastic resin films,
The both films are composed of a single-sided sheet and a half-sided sheet folded from the center, the single-sided sheets face each other, and the two half-sided sheets are on the surface side of the gusseted bag-like body, The two single-sided sheets are connected by a U-shaped welded portion, and the outer edge of the single-sided sheet and the outer edge of the half-sided sheet that are the same film of the two films are connected by an outer edge welded portion. A gusseted bag-like body having the gusset and the bottom as both the single-sided sheets.   The cover body which covers the opening part of the said gusseted bag-like body is provided in any one of the said half surface side sheet | seat, or one side of the said half surface side sheet | seat was used as the cover sheet | seat of a book cover. The gusseted bag-like body of description. The gusseted bag-like body according to claim 5, wherein a plurality of punched holes are formed in any one of the half-side sheets of the gusseted bag-like body or an adhesive surface. The gusseted bag-like body according to claim 5, wherein the gusseted bag-like body is provided as a file in which a plurality of storage portions are provided.   The gusseted bag-like body according to claim 5, wherein another film is laminated on the film in the vicinity of the opening of the gusseted bag-like body, or a folded portion is provided.

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