JP6645992B2 - Manufacturing method for packaging bags - Google Patents

Description

  The present invention relates to a packaging bag with an inner pocket and a method for manufacturing the same.

  As a packaging bag with an inner pocket, for example, as disclosed in Patent Literature 1, a packaging bag having a pocket attached inside an opening near a bag body is disclosed.

  Patent Literature 2 discloses a packaging bag in which a window hole is formed in a bag body, and a transparent film that covers the window hole is attached to an inner surface of the bag body.

Japanese Utility Model Publication No. 61-169034 JP-A-11-59694

  By the way, recently, fried foods such as french fries are sold as take-out products at convenience stores and fast food stores, and these cooked foods are sold in paper bags. In such take-out products, sachets containing seasonings and the like are also provided at the same time as french fries and other products. ing.

The present invention is intended to provide a manufacturing method in view of the above, even if the packaging bag with the inner possible storage bag easy simply to produce sachets seasoning containing.

  In order to achieve the above object, the present invention provides a step of punching and forming a window hole in a base paper constituting a bag body, and a step of joining a pocket piece for forming an inner pocket to the window hole from the inside of the base paper, A cylinder forming step of forming the base paper into a tubular shape, and forming a bag body by cutting the cylindrical body obtained in the tube forming process at one end side of the window hole, and forming an inner pocket inside the open end of the bag body. A method of manufacturing a packaging bag, comprising: a step of cutting a tubular body to be formed; and a bottom molding step of molding a bottom of the bag body.

  ADVANTAGE OF THE INVENTION According to this invention, using the window hole formed in a bag main body and the film (pocket piece) stuck on the inside, a concave window hole with the upper end opened at the opening edge is formed in the opening edge of a bag main body. The film to be bonded to the inside of the window hole also opens the opening edge side of the bag body, so that the film is used as a pocket piece to form an inner pocket. Therefore, a packaging bag with an inner pocket can be easily manufactured simply by devising a cutting step using a conventional manufacturing facility for manufacturing a packaging bag with a window hole.

It is a perspective view of the bag for packaging which shows the embodiment concerning the present invention. It is sectional drawing which shows the inner pocket of a packaging bag. (A)-(e) is the schematic which shows the manufacturing process of the packaging bag of this invention. (A)-(c) is explanatory drawing which shows a cylinder manufacturing process. (A)-(d) is explanatory drawing which shows a bottom folding process. It is a perspective view of a bag for packaging which shows another embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the packaging bag 1 of the present embodiment has a concave window hole 4 whose upper end is open to the opening edge 3 at the opening edge 3 of the bag body 2. Inside the window hole 4, there is provided a pocket piece 5 whose upper end is open and the left and right sides and the bottom are joined (glued). The pocket piece 5 has an inner pocket 7 capable of accommodating a sachet 6 containing seasonings.

  The bag body 2 is a paper-made material capable of storing french fries and the like, and is formed of various materials such as a paper-only material or a paper material laminated with a synthetic resin film inside, or a synthetic resin material. be able to.

  The bag body 2 of this example is of a horizontal gusset type in which a gusset is formed on the side 2a, and a longitudinal fold 10a is formed at the center of the side 2a. It is folded to the bottom (see FIG. 5).

  The window hole 4 at the opening edge 3 of the bag body 2 is formed by using a bag making facility for a window hole formed at the center of the bag body, as described in JP-A-11-59694. You. Details will be described in a manufacturing method described later. The window hole 4 may have various shapes such as an elliptical shape, a rectangular shape, a circular shape, and a star shape. However, since the inner pocket is an opening edge, a substantially rectangular shape is preferable.

  The pocket piece 5 is a transparent synthetic resin film that closes the window hole 4, but is not limited thereto, and may be made of the same material as the bag body 2, a nonwoven fabric, or the like. The pocket piece 5 is arranged at a position where its upper end is lower than the opening edge 3 of the bag body 2. This is because a bending margin D (see FIG. 1) of the opening edge 3 is provided between the pocket piece 5 and the opening edge 3 of the bag body 2. The pocket piece 5 is arranged at a position lowered by the bending margin D. You.

  Next, a method for manufacturing a packaging bag will be described with reference to FIGS. The arrow shown in FIG. 3A indicates the direction in which the base paper flows. As shown in FIG. 3A, the packaging bag 1 is subjected to a predetermined printing on a roll-shaped base paper 1A having a predetermined width by a bag making machine (not shown), and then as shown in FIG. Then, the window hole portion 4a is punched to form the window hole 4. In FIG. 3A, reference numeral 100 denotes a punched window piece. A pocket piece 5, which is a film for forming a pocket, is attached to the punched window hole 4 from the inside of the base paper 1A. The pocket pieces 5 are formed by cutting a roll-shaped synthetic resin film into a predetermined size and supplying the cut piece to the window hole 4 part by sheet. Then, since the film is supplied only to the window hole portion, there is no useless portion of the film.

  At this time, as shown in FIG. 3B, the pocket piece 5 does not cover the entire surface of the window hole 4, but leaves the opening margin 3 of the opening edge 3 of the bag body 1, and the pocket piece 5 extends from the window hole 4. Shift (join) to the position. Gluing is performed only on the three sides of the left and right sides and the bottom of the pocket piece 5. In FIG. 1, a portion shown by hatching with a broken line is a glued portion.

  Next, as shown in FIG. 3 (c), while the base paper 1A is mechanically bent to form a horizontal M-shaped horizontal gusset on the side portion 2a when viewed from the direction in which the base paper flows, the rectangular cylindrical body 1B is removed. Mold. The cylinder forming process will be described later.

  Next, as shown in FIG. 3D, the cylinder 1B is cut to a designated length. This cutting position is a position where the bending margin D of the opening edge 3 of the bag body 2 is left. The cylindrical body 1B is cut into a cylindrical bag main body 2 having a predetermined size, and the end opposite to the opening edge 3 is set as a bottom. As shown in FIG. The packaging bag 1 with the label is molded. As a cutting position, the remaining portion of the window hole 4 remains in a concave shape on the bottom edge side, and this concave portion 18d is reinforced by gluing a rectangular bottom piece 19 as shown in FIG. When the bottom piece 18b is turned upside down in the bottom folding step, it is hidden by adopting a mode in which the opposite bottom piece 18b is turned to the front side, so that there is no problem in appearance.

  FIG. 4 shows the tube making process. FIG. 4 illustrates one bag of base paper 1A for easy understanding. In this cylinder making step, as shown in FIG. 4 (a), three parallel folds 10a, 10b are formed on one edge and the center of the base paper 1A with a molding plate (not shown) in order to form a fold in advance. , 10c. Then, as shown in FIG. 4 (b), one side edge of the creased base paper 1A and a substantially central portion thereof are folded in an M-shape, and the outer edges of the base paper 1A are attached to each other, and a horizontal gusset is provided. The cylinder 1B is made into a cylinder. At the time of bonding, a margin 12 is provided at the end of the base paper 1A. Then, as shown in FIG. 4C, a cylindrical body 1B having front and rear openings can be formed. The cylindrical body 1B has an M-shaped folded portion formed on the left and right sides 2a.

  Next, the bag body 2 is folded down. The bottom folding step can be performed by a known method disclosed in, for example, Japanese Patent No. 48658/78. The bottom folding step will be briefly described with reference to FIGS. FIG. 5A shows a state in which the side portion 2a is extended to open the bottom opening of the bag body 2 for easy understanding. Near the bottom edge 2c of the bag main body 2 that has undergone the tube forming process, two parallel folds 13 and 14 for folding the bottom are formed parallel to the bottom edge 2c. The first fold 13 is for bending the bottom portion 18 of the bag body 2 toward the body 2 b of the bag body 2, and is provided over the entire circumference of the bag body 2. The second fold 14 is for forming the peripheral edge of the bottom 18, and is provided closer to the bottom edge 2 c than the first fold 13.

  The side 2a of the bag body 2 has an intersection between the first fold 13 and the center fold 10a of the side 2a, the second fold 14 and the side 2a of the bag body 2 and the body. Third oblique folds 15 are formed between the intersections with the folds 10b and 10c constituting the boundary of the portion 2b. The third fold 15 is formed in a convex shape on the inner surface side of the bag body 2 and is formed at an angle of approximately 45 degrees with respect to the center fold 10a of the side portion 2a.

  According to these folds 13, 14, and 15, as shown in FIG. 5 (b), the bottom edge side is bent by about 90 degrees from the first fold 13, and while the bottom edge 2c of the bag body 2 is expanded, the fold is formed. 13 and 14 and the oblique fold 15 are folded to open the bottom edge 2c of the bag body 2 in a square shape. An oblique line is provided between the intersection between the folds 10b and 10c at the boundary between the body 2b and the side 2a of the bag body 2 and the second fold 14, and the bottom edge 2c on the body side. A fourth fold 16 is provided. The fold 16 is formed in a convex shape on the outer surface side of the bag body 2 and is formed at an angle of approximately 45 degrees with respect to the bottom edge 2c.

  Then, as shown in FIG. 5 (c), the bag body 2 is folded along the fourth fold 16, and the rectangular bottom piece 18a on the side 2a side of the bag body 2 and the trapezoidal bottom pieces 18b, 18c on the body 2b side. Is provided. These bottom pieces 18a, 18b, 18c are folded inward, and the bottom 18 is molded as shown in FIG. The bottom portion 18 may be reinforced by gluing a rectangular bottom piece 19 as necessary.

  As described above, in the present embodiment, a concave window hole 4 whose upper end is open to the opening edge 3 is formed at the opening edge 3 of the bag body 2, and the upper end of the pocket piece 5 has an opening inside the window hole 4. The left and right sides and the bottom are joined to form an inner pocket 7. Therefore, a small bag containing a seasoning can be stored separately in a packaging bag in the inner pocket, and a good-looking bag can be provided when a product such as french fries is provided.

  Further, the upper end of the pocket piece is disposed at a position lower than the opening edge of the bag body, and a margin can be formed near the opening edge of the bag body. Since such a bending allowance is formed, seasoning is poured into fried food such as french fries in the bag, the opening edge of the bag body is bent at the bending allowance, the bag is closed, and the bag is shaken to fry the seasoning. It can be mixed evenly with products such as potatoes.

  The method for manufacturing such a packaging bag includes a step of punching and forming a window hole in the base paper constituting the bag body, and a step of joining a pocket piece for forming an inner pocket from the inside of the base paper to the window hole. A cylindrical forming step of forming the base paper into a cylindrical shape, and cutting the cylindrical body obtained in the cylindrical forming process at one end of the window hole to form a bag main body and an inner pocket inside the opening end of the bag main body. And a bottom molding step of molding the bottom of the bag body.

  According to the above manufacturing method, a concave window hole having an upper end opened to the opening edge is formed at the opening edge of the bag body by using the window hole formed in the bag body and the film (pocket piece) stuck on the inside thereof. Also, by opening the opening edge side of the bag body, the film to be bonded to the inside of the window hole can be used as a pocket piece to form an inner pocket. Therefore, a packaging bag with an inner pocket can be easily manufactured simply by devising a cutting step using a conventional manufacturing facility for manufacturing a packaging bag with a window hole.

  In addition, when joining the pocket piece to the window hole, the pocket piece is stuck out of the window hole, and the opening edge position of the bag main body is positioned above the upper end of the pocket piece in the cutting step of the cylindrical body. In this manner, the bending margin can be easily manufactured at the opening edge of the bag body.

  In addition, the pocket piece is made of a transparent synthetic resin film, so that a packaging bag with a transparent inner pocket is provided by using the conventional manufacturing equipment for producing a packaging bag with a window hole. be able to.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the present invention. For example, as shown in FIG. 6, a configuration in which the upper end of the pocket piece 5 is arranged at the same position as the opening edge 3 without forming a bending allowance at the opening edge 3 of the bag body 2 can also be adopted. Further, in the above-described embodiment, the mode in which the pocket pieces are glued is illustrated, but the pocket pieces can also be bonded by a mode in which they are heat-fused.

D Folding allowance 1 Packaging bag 1A Base paper 1B Tube 2 Bag body 2a Side 2b Body 2c Bottom edge 3 Opening edge 4 Window hole 5 Pocket piece 6 Pouch 7 Inner pockets 10a, 10b, 10c Fold 13 First fold Eye 14 second fold 15 third fold 16 fourth fold 18 bottom 19 bottom piece

Claims (3)

  A step of punching and forming a window hole in the base paper constituting the bag body, a step of joining a pocket piece for forming an inner pocket from the inside of the base paper to the window hole, and a cylinder making step of forming the base paper into a tubular shape. Cutting the tubular body obtained in the tubular manufacturing step at one end side of the window hole to form a bag body and forming an inner pocket inside the open end of the bag body; And a bottom molding step of molding the bottom of the packaging bag. When joining the pocket piece to the window hole, the pocket piece is staggered from the window hole and adhered so that the opening edge position of the bag body is positioned higher than the upper end of the pocket piece in the cutting step of the cylindrical body. The method for producing a packaging bag according to claim 1 , wherein the packaging bag is cut. The method for manufacturing a packaging bag according to claim 1 , wherein the pocket piece is made of a transparent synthetic resin film.

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