JP6725275B2 - Method for manufacturing packaging material for pouch container and apparatus for manufacturing packaging material for pouch container - Google Patents

Description

The present invention relates to a method for manufacturing a packaging material for a pouch container and an apparatus for manufacturing a packaging material for a pouch container.

Pouch containers are widely used as containers for beverages such as sports drinks, food products such as ice cream and jelly, and medical liquids. FIG. 28: has shown an example of the manufacturing method of the conventional packaging material for pouch containers (refer patent document 1). In the manufacturing method shown in the figure, first, as shown in the figure (a), the tubular film 91 having the vertical seal portion 92 is formed by joining both ends of the strip-shaped film. Next, as shown in FIG. 7B, the first bottom seal portion 93 is formed by joining one end of the tubular film 91 in the axial direction. Next, as shown in FIG. 7C, the bottom portion of the tubular film 91 is pushed open to form a pair of extension portions 94 extending to both sides along the first bottom seal portion 93. Next, as shown in FIG. 6D, the root portions of the pair of extending portions 94 are joined to form the pair of second bottom seal portions 95, and the surplus portions of the pair of extending portions 94 are removed. Remove by cutting. Then, as shown in FIG. 7E, the spout 97 is fixed to the tubular film 91 by forming the ceiling seal portion 96 in a state where the spout 97 is arranged at the other end of the tubular film 91. The tubular film 91 is sealed. By passing through the above process, the packaging material X for pouch containers is obtained.

One advantage of the pouch container using the pouch container packaging material X is that it can stand on its own in the posture shown in FIG. 28(e). However, in order to allow the pouch container to have a bottom surface capable of achieving self-standing, it is necessary to form the seal portions extending in different directions such as the vertical seal portion 92, the first bottom seal portion 93, and the pair of second bottom seal portions 95. There is. In particular, when the tubular film 91 has a pair of fold lines at both ends in the width direction, the step of forming the seal portion extending in the direction intersecting the direction in which the pair of fold lines are separated may be performed one by one, for example, manually. It was natural for me to get used to it, making full automation of the production line difficult.

JP-A-2002-308289

The present invention was devised under the circumstances described above, and a method for producing a packaging material for a pouch container and a packaging material for a pouch container capable of producing a packaging material for a pouch container more efficiently. It is an object of the present invention to provide a manufacturing device.

A method for producing a packaging material for a pouch container provided by the first aspect of the present invention is a method for producing a packaging material for a pouch container used for a pouch container, wherein a pair of pouch container packaging materials are provided at both ends in a direction perpendicular to the axial direction. Arranged on opposite sides in the first direction, which is a direction intersecting the direction in which the pair of folding lines are separated from each other, from one end in the axial direction of the tubular film folded to have a folding line, at a predetermined angle. At least a part of the tubular film by inserting the one end side support body having a pair of first support surfaces that are formed, and separating the pair of first support surfaces from each other in the first direction. A step of changing to a flat shape along the first direction, and a flat shape along the first direction by joining at least a part of the tubular films in a state of being supported by the one end side support body. And a step of forming a flat portion on the bottom side which is maintained in the state.

In a preferred embodiment of the present invention, the one end side support body includes a pair of first support pins having the pair of first support surfaces.

In a preferred embodiment of the present invention, the one end side support body further has a pair of second support surfaces arranged on opposite sides in a second direction which is a direction intersecting with the first direction. In the step of inserting the one end side support body, the one end side support body is inserted in a posture in which the second direction is along the direction in which the pair of folding lines are separated from each other, and is changed to the flat shape. In the step, while maintaining the tubular film in a state of having tension so that the inner surface of the tubular film is in contact with the pair of first support surfaces and the pair of second support surfaces, the pair of first support The surfaces are spaced from each other in the first direction and the pair of second support surfaces are close to each other in the second direction.

In a preferred embodiment of the present invention, the one-end side support body includes a pair of second support pins having the pair of second support surfaces.

In a preferred embodiment of the present invention, before the step of inserting the one-end-side support, at least one of the tubular films closer to the other end in the axial direction than the site where the bottom-side flat portion is formed. The method further includes the step of joining the parts to each other to form a top flat part that is maintained flat along a direction in which the pair of folding lines are separated from each other.

In a preferred embodiment of the present invention, in the step of forming the top flat portion, a top partial seal portion in which a part of the pair of folding lines are separated from each other is sealed, and in the axial direction. And forming a top side partial opening that opens.

In a preferred embodiment of the present invention, in the step of forming the bottom flat portion, a bottom partial seal portion in which parts in the first direction are sealed, and a bottom portion opening in the axial direction And forming an opening.

In a preferred embodiment of the present invention, the predetermined angle is 90 degrees.

An apparatus for manufacturing a packaging material for a pouch container provided by the second aspect of the present invention is a manufacturing apparatus for a packaging material for a pouch container used for a pouch container, in which a pair of pouch container packaging materials is provided at both ends in a direction perpendicular to the axial direction. Opposite to each other in a first direction, which is a direction in which the pair of folding lines intersects each other at a predetermined angle, which is inserted from one end in the axial direction of the tubular film folded to have a folding line. End side supports having a pair of first support surfaces arranged on the side and capable of approaching and separating in the first direction, and the pair of support surfaces are supported by the one end side supports separated from each other in the first direction. A bottom flattening maintaining portion that forms a bottom flattened portion that is kept flat along the first direction by joining at least some of the tubular films together in a closed state. It is characterized by that.

In a preferred embodiment of the present invention, the one end side support body includes a pair of first support pins having the pair of first support surfaces.

In a preferred embodiment of the present invention, the one-end side support members are arranged on opposite sides in a second direction which is a direction intersecting with the first direction and are capable of approaching and separating in the second direction. While having a pair of second supporting surfaces, the second direction is inserted into the tubular film in a posture along the direction in which the pair of fold lines separate from each other, and the bottom flattening maintaining portion is While maintaining the state in which the tubular film has a tension so that the inner surface of the tubular film contacts the pair of first support surfaces and the pair of second support surfaces, the pair of first support surfaces is the first Forming the bottom flat portion after being separated from each other in the direction and the pair of second supporting surfaces being close to each other in the second direction.

In a preferred embodiment of the present invention, the one-end side support body includes a pair of second support pins having the pair of second support surfaces.

In a preferred embodiment of the present invention, at least a portion of the tubular film before the one end side support is inserted, at least a portion of the tubular film closer to the other end in the axial direction than the site where the bottom flat portion is formed. And a top side flattening maintaining portion that forms a top side flattening portion which is maintained flat along the direction in which the pair of folding lines are separated from each other.

In a preferred embodiment of the present invention, in the top flattening maintaining portion, a top end side partial sealing portion in which a part of a direction in which the pair of folding lines are separated is sealed, and a ceiling opening in the axial direction. The top flat portion including the side partial opening is formed.

In a preferred embodiment of the present invention, in the bottom-side flatness maintaining portion, a bottom-side partial seal portion in which a part of the first direction is sealed, and a bottom-side partial opening portion that opens in the axial direction, The bottom flat portion including is formed.

In a preferred embodiment of the present invention, the predetermined angle is a right angle.

According to the present invention, after supporting the tubular film by the one end side support, by separating the pair of first support surfaces in the first direction, at least a part of the tubular film The fold line is changed to a flat shape in the direction intersecting the direction in which it separates. Then, the bottom flat portion is formed that is flat in the direction in which the pair of first support surfaces are separated from each other. This makes it possible to efficiently form the bottom flat portion along the direction intersecting the direction in which the pair of folding lines separate from each other, as compared with, for example, a manual process.

Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a whole lineblock diagram showing the manufacturing device of the pouch container packing material based on a 1st embodiment of the present invention. (A) is a principal part expanded sectional view which shows the cylindrical film in the manufacturing method of the pouch container packaging material based on 1st Embodiment of this invention, (b) is a principal part top view. It is a perspective view which shows the 1st process part of the manufacturing apparatus of the pouch container packaging material based on 1st Embodiment of this invention. It is a top view which shows the cylindrical film in the state which the process shown in FIG. 3 was completed. It is a perspective view which shows the 2nd process part (a) of the manufacturing apparatus of the packaging material for pouch containers based on 1st Embodiment of this invention. It is sectional drawing which follows the VI-VI line of FIG. It is a perspective view which shows the 2nd process part (b) of the manufacturing apparatus of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a perspective view which shows the 2nd process part (c) of the manufacturing apparatus of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a perspective view which shows the 2nd process part (d) of the manufacturing apparatus of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a top view showing a tubular film in the state where the 2nd process part (d) was completed. It is a top view which shows the 3rd process part of the manufacturing apparatus of the pouch container packaging material based on 1st Embodiment of this invention. FIG. 12 is a plan view showing the tubular film in a state where the third step shown in FIG. 11 has been completed. It is a perspective view which shows (a)-(g) of the back process part of the manufacturing apparatus of the pouch container packaging material based on 1st Embodiment of this invention. It is a principal part sectional view which shows the intermediate product of the state of (b) of the post process of FIG. It is a principal part side view which shows the intermediate product of the state of (b) of the post process of FIG. It is a principal part side view which shows the intermediate product of the state of (c) of the post process of FIG. It is a top view which shows the intermediate product of the state of (c) of the post process of FIG. It is a top view which shows the packaging material for pouch containers based on 1st Embodiment of this invention. It is sectional drawing which follows the XIX-XIX line of FIG. It is sectional drawing which follows the XX-XX line of FIG. It is sectional drawing which follows the XXI-XXI line of FIG. It is a perspective view showing a pouch container based on a 1st embodiment of the present invention. It is sectional drawing which shows the modification of the manufacturing apparatus of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a top view which shows the other modified example of the manufacturing apparatus and the manufacturing method of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a top view which shows the other modified example of the manufacturing apparatus and the manufacturing method of the packaging material for pouch containers based on 1st Embodiment of this invention. It is a top view which shows the other modified example of the manufacturing apparatus and the manufacturing method of the packaging material for pouch containers based on 1st Embodiment of this invention. It is sectional drawing which shows the other modification of the manufacturing apparatus and manufacturing method of the packaging material for pouch containers based on 1st Embodiment of this invention. (A)-(e) is a perspective view which shows an example of the manufacturing method of the conventional packaging material for pouch containers.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

A method of manufacturing a packaging material for a pouch container, an apparatus for manufacturing a packaging material for a pouch container, and an intermediate product of the packaging material for a pouch container according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 17. ..

In these figures, the axial direction of the tubular film 1, which will be described later, that is, the direction in which the vertical seal portion 20 extends is defined as the x direction. The y-direction and the z-direction are directions that are perpendicular to the x-direction. In the manufacturing process until the packaging material A1 for a pouch container described later is completed, the y direction and the z direction are defined as directions mainly depending on the constituent elements of the manufacturing apparatus. Further, in the following description after the packaging material A1 for pouch container is completed, the direction in which the ceiling seal portion 23 described later extends is defined as the y direction. On the other hand, in the manufacturing process until the packaging material A1 for pouch container is completed, the U direction and the B direction are used for convenience. The U direction and the B direction are directions depending on the intermediate product C1 which is an intermediate product of the pouch container packaging material A1. The U direction is a direction in which a top flat portion 42 described below extends, and the B direction is a direction in which a bottom flat portion 41 described below extends.

FIG. 1 is an overall perspective view showing an apparatus for manufacturing a packaging material for a pouch container according to this embodiment. The pouch container packaging material manufacturing apparatus D1 of the present embodiment includes a first process unit M1, a second process unit M2, a third process unit M3, and a post-process unit Mpo. In addition, in the first process unit M1, the second process unit M2, the third process unit M3, and the post-process unit Mpo, any of the plurality of process units is integrated into one device unit in which the functions to be performed by each are integrated. Alternatively, any one process unit may be dispersed in a plurality of device parts.

First, the tubular film 1 used in the first process unit M1 is prepared. The tubular film 1 is, for example, as shown in FIG. 2A, made into a tubular shape by joining both ends of the band-shaped film 1A in the width direction with the seal tape 20a.

Here, the strip-shaped film 1A is usually composed of a resin film. The resin film is required to have basic performance as a package, such as impact resistance, abrasion resistance, and heat resistance. Further, since each of the above-mentioned sealing portions is usually formed by heat sealing, the sheet is also required to have heat sealing properties. The sheet is preferably a multi-layer sheet having a base film layer and a sealant layer for imparting heat sealing properties, and when high gas barrier properties and light shielding properties are required, a base film layer and a sealant layer It is preferable to provide a barrier layer between them. The base film layer itself may be provided with a barrier property. In this case, the barrier layer is used as the base film layer to form a multilayer sheet having a barrier layer and a sealant layer.

Here, constituent materials of the base film layer, the sealant layer, and the barrier layer are exemplified. The layers can be laminated by a conventional laminating method such as co-extrusion lamination, dry lamination with an adhesive, and thermal lamination in which a thermoadhesive layer is sandwiched and adhered by heat.

As the film constituting the base film layer, polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene ( PP) etc.), polyamide (nylon-6, nylon-66 etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethylmethacrylate (PMMA), poly An example is a stretched or unstretched film having one layer or two or more layers made of ether sulfone (PES) or the like.

As the film constituting the sealant layer, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), biaxially stretched nylon (ON). One or more layers composed of ethylene, olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), etc. The stretched or unstretched film can be exemplified.

As the barrier layer, a metal thin film such as aluminum, a resin film such as vinylidene chloride (PVDC), an ethylene-vinyl alcohol copolymer (EVOH), or an arbitrary synthetic resin film (for example, a base film layer may be used. ), a film obtained by vapor deposition (or sputtering) of an inorganic oxide such as aluminum, aluminum oxide or silica can be exemplified.

The band-shaped film 1A can be provided with a print layer (not shown) for displaying the product name of the contents, product description such as raw materials and precautions for use, and other various designs. For example, the print layer can be formed on the inner surface of the base film layer by a known method such as gravure printing. The configuration of the band-shaped film 1A described above is inherited by the tubular film 1 and the main film portion 10 which will be described later.

In the example shown in FIG. 2A, the strip film 1A includes a base film layer 101, a sealant layer 102, a barrier layer 103, and an intermediate layer 104. The base film layer 101 constitutes the outermost layer of the strip film 1A, and the sealant layer 102 constitutes the innermost layer of the tubular film 1. The barrier layer 103 and the intermediate layer 104 are interposed between the base film layer 101 and the sealant layer 102. In this example, the intermediate layer 104 is arranged between the sealant layer 102 and the barrier layer 103. The intermediate layer 104 is a layer made of the same material as the base film layer 101, for example.

As the seal tape 20a, a commonly known one is used, and is, for example, a single-layer or multi-layer strip film in which a film made of the same material as the sealant layer constitutes the front and back surfaces. In the case of a multi-layer film, a layer structure in which the above-mentioned base material layer or barrier layer, or both of them constitute the central layer and the above-mentioned sealant layer constitutes the front and back layers is suitable. Further, at this time, it is preferable that the widthwise end edges of the strip-shaped film 1A are configured such that the sealant layers on the front and back surfaces are bonded to each other, and the end edges of the base material layer and the like of the central layer do not face the outside.

By using the band-shaped film 1A and the seal tape 20a as described above, the seal tape 20a is joined to the vicinity of both end edges of the band-shaped film 1A, and thus the vertical seal portion 20 extending in the longitudinal direction (axial direction) (FIG. 2A). The tubular film 1 having the reference) is obtained. The vertical seal portion 20 is not limited to the configuration in which the seal tape 20a and the vicinity of both end edges of the strip-shaped film 1A are joined, and for example, a state in which sealant layers on the inner surfaces of the strip-shaped film 1A near both end edges are joined together. The seal tape 20a may not be used by joining them in a so-called “seasoning pasting shape”. In the present embodiment, as shown in FIG. 2A, an example will be described in which the strip-shaped film 1A is joined to the sealing tape 20a in a state in which the vicinity of both end edges overlap each other. Further, in the present embodiment, as shown in FIG. 2B, the case where the vertical seal portion 20 and the seal tape 20a are moved to one side in the y direction will be described as an example. As shown in FIG. 1B, the tubular film 1 is formed in a flat band shape having a pair of folding lines 18 at both ends in the y direction. The tubular film 1 is sent to the next step while being wound on the intermediate roll 711 shown in FIG. 3, for example.

Then, the first step is performed. FIG. 3 is a perspective view showing a first step portion M1 of the pouch container packaging material manufacturing apparatus D1 that performs the first step. First, the flat roll-shaped tubular film 1 is sequentially sent out from the intermediate roll 711. Next, the cutter 761 cuts the tubular film 1 so as to traverse the y direction. This cutting is performed at a predetermined pitch on the tubular film 1 fed in the x direction. As a result, a portion having a length in the x direction of a predetermined pitch is cut out from the tubular film 1 to obtain an intermediate product C1. The intermediate product C1 is obtained by cutting off a part of the tubular film 1, and corresponds to an example of the tubular film referred to in the present invention. However, in the following description, as an intermediate product C1 for convenience of understanding. explain. The intermediate product C1 has an opening 410 on one end side at one end in the x direction. The one end side opening portion 410 is a portion that is opened over the entire width in the y direction.

Then, a step of forming the top flat portion 42 is performed. In the present embodiment, the top flattening portion 42 is formed on the intermediate product C1 by the top flattening maintaining portion 762. The top-side flatness maintaining portion 762 keeps the intermediate product C1 on the top side by maintaining the one end in the x direction of the intermediate product C1 (the part that becomes the top-side end in the packaging material A1 for the pouch container) in a flat shape. The flat portion 42 is formed. In the present embodiment, the top flattening maintaining portion 762 is composed of two seal pins. These seal pins are for joining a part of desired parts of the intermediate product C1 to each other by heat sealing. In the illustrated example, the two seal pins are separated from each other in the y direction and are located at both ends of the tubular film 1 in the y direction. As shown in FIG. 4, the ceiling-side flatness maintaining portion 762 configured by such two seal pins forms the ceiling-side flat portion 42 including the two ceiling-side partial seal portions 421 and the ceiling-side partial opening 422. .. In the illustrated example, the position in the x direction where the top flat portion 42 is formed is closer to the other end in the x direction than the portion where the bottom flat portion 41 described later is formed (the right end in the x direction in FIG. 4). It is).

The two top-side partial seal portions 421 are formed by heat-sealing the overlapping portions of the intermediate product C1 in the z-direction at both ends in the y-direction. In the illustrated example, the top side partial seal portion 421 includes both ends in the y direction of the intermediate product C1. The top-side partial opening 422 is a portion that opens in the x direction between the two top-side partial openings 422. By forming the two top-side partial seal portions 421, the top-side flat portion 42 is a portion where the flat state is maintained along the y direction which is perpendicular to the x direction. In the following description, the direction that is perpendicular to the x direction and in which the top flat portion 42 extends is the U direction. In the top flat portion 42 of this embodiment, two top partial seal portions 421 and a top partial opening 422 are arranged in the U direction.

The intermediate product C1 on which the top flat portion 42 is formed is sent to the second process unit M2 which is the next process. In the example illustrated in FIG. 3, the intermediate product C1 is slid in the y direction by the slide stage 763 for the purpose of smooth delivery to the second process unit M2. In the illustrated example, two intermediate products C1 are slid together.

Then, the second step is performed. The second step is carried out in the second step section M2 shown in FIGS. The second process part M2 includes a support 77 on one end side, a drive part 772, and a flattening maintaining part 776 on the bottom side. The illustrated example has a configuration in which the second step is collectively performed on one intermediate product C1, but this is an example. The second step may be collectively performed on two or more intermediate products C1.

FIG. 5 is a perspective view showing the second process portion M2 in a state where the process of inserting the one end side support body 77 into the intermediate product C1 is completed. FIG. 6 is a sectional view taken along line VI-VI of FIG. As shown in FIGS. 5 and 6, the one end side support body 77 of the present embodiment is composed of a pair of first support pins 771 and a pair of second support pins 779. Each of the pair of first support pins 771 has a columnar shape with the x direction as the axial direction, and is arranged in the z direction at a distance. The z direction corresponds to the first direction of this embodiment. The portions of the surfaces of the pair of first support pins 771 facing both sides in the z direction form a pair of first support surfaces 770. Each of the pair of second support pins 779 has a columnar shape with the x direction as the axial direction, and is arranged in the y direction at a distance. The y direction corresponds to the second direction of this embodiment. In this embodiment, the z direction (first direction) and the y direction (second direction) form 90 degrees, but the first direction and the second direction only need to intersect with each other. .. Of the surfaces of the pair of second support pins 779, portions facing both sides in the z direction form a pair of second support surfaces 778. The material of the first support pin 771 and the second support pin 779 is not particularly limited, and metal, resin, or the like can be appropriately used. Hereinafter, the case where the first support pin 771 and the second support pin 779 are made of stainless steel will be described as an example. The shapes of the first support pin 771 and the second support pin 779 are not particularly limited. For example, when the tips of the first support pin 771 and the second support pin 779 are hemispherical with a curved surface, unintended streaks due to the tips of the first support pin 771 and the second support pin 779 are formed in a process described later. It is possible to prevent a mark from being formed on the intermediate product C1. Further, the first support pin 771 and the second support pin 779 are not limited to those formed of a single material, and for example, the surface of a core material made of metal or the like has a larger friction coefficient than the core material. The anti-slip member formed of resin, rubber, or the like may be attached.

In the present embodiment, the pair of first support pins 771 and the pair of second support pins 779 are connected to the drive unit 772. The drive unit 772 moves the pair of first support pins 771 toward and away from each other in the z direction, and moves the pair of second support pins 779 toward and away from each other in the y direction. The specific configuration of the drive unit 772 is not particularly limited, and a motor, an air cylinder or the like is appropriately used as a drive source.

In the second process portion M2(a) shown in FIG. 5, the one end side support body 77 is inserted in the x direction from the one end side opening 410 at one end in the x direction of the intermediate product C1 that has completed the first process. The length of inserting the one end side support member 77 (a pair of first support pins 771) into the intermediate product C1 is not particularly limited, but if the step of changing the intermediate product C1 into a flat shape described later can be appropriately performed, A shorter insertion depth is preferable. Further, when inserting the one-end side support body 77 into the intermediate product C1, the z-direction distance between the pair of first support pins 771 is minimized by the drive unit 772, and the y-direction distance between the pair of second support pins 779 is illustrated. Keep the distance smaller than that shown in 5. Then, after the one end side support body 77 is inserted into the intermediate product C1, the distance between the pair of second support pins 779 may be expanded to the distance shown in FIG. When the insertion of the one end side support body 77 is completed, the portion near the one end side opening 410 of the intermediate product C1 is widened in the y direction. The U direction, which is the direction in which the top side partial opening 422 extends, is substantially parallel to the y direction.

Next, a step of changing at least a part of the intermediate product C1 into a flat shape is performed. From the state shown in FIG. 5, as shown in FIG. 6, the pair of first support pins 771 are separated in the z direction and the pair of second support pins 779 are moved in the y direction by the drive unit 772. At this time, it is preferable to maintain the intermediate product C1 in a tensioned state so that the inner surface of the intermediate product C1 contacts the pair of first support surfaces 770 and the pair of second support surfaces 778. To maintain such a state, for example, based on the known circumference of the intermediate product C1, the z-direction distance between the pair of first support pins 771 and the y-direction distance between the pair of second support pins 779 is set to the drive unit. It can be realized by synchronously controlling by 772. FIG. 6 shows an intermediate stage of the step of changing at least a part of the intermediate product C1 into a flat shape.

The second process section M2(b) shown in FIG. 7 shows a state in which the process of changing the intermediate product C1 into a flat shape is completed. In this state, the pair of first support pins 771 are separated from each other in the z direction, and the pair of second support pins 779 are closest to each other in the y direction. As a result, the portion of the intermediate product C1 on the one end side opening portion 410 side has a flat shape along the z direction by the pair of first support pins 771 (first support surface 770). On the other hand, the top flat portion 42, which is the other end of the intermediate product C1 in the z direction, maintains the flat shape along the U direction. As a result, the direction along which the portion on the one end side opening portion 410 side extends and the U direction intersect at 90 degrees.

Next, in the second process portion M2(c) shown in FIG. 8, the bottom flattening portion 41 is formed on the intermediate product C1 by the bottom flattening maintaining portion 776. The bottom flattening maintaining portion 776 keeps the end of the intermediate product C1 on the side opposite to the top flattening portion 42 in the x direction (the portion serving as the bottom end in the pouch container packaging material A1) in a flat shape. Thus, the bottom flat portion 41 is formed on the intermediate product C1. In the present embodiment, the bottom flattening maintaining portion 776 is composed of two seal pins. These seal pins are for joining a part of desired parts of the intermediate product C1 to each other by heat sealing. In the illustrated example, these seal pins are arranged so as to sandwich the pair of second support pins 779 in the z direction, and are provided between the pair of first support pins 771. As shown in FIGS. 9 and 10, the bottom flattening maintaining portion 776 configured by such a seal pin includes the bottom flattening portion 41 including two bottom side partial seal portions 411 and three bottom side partial openings 412. To form.

Each of the two bottom side partial seal parts 411 is a part where the intermediate product C1 overlaps in the y direction at the center in the z direction and is joined by heat sealing. The three bottom side partial openings 412 are portions that open in the x direction on both sides in the B direction of the bottom side partial opening 412 and between the two bottom side partial seal portions 411. By forming the bottom side partial seal portion 411, the bottom side flat portion 41 is a portion where the flat state is maintained along the z direction. In the following description, the direction that is perpendicular to the x direction and in which the bottom flat portion 41 extends is the B direction. The B direction makes a predetermined angle with the U direction, and in the illustrated example, the B direction and the U direction form 90 degrees. In the bottom flat portion 41 of this embodiment, two bottom partial seal portions 411 and three bottom partial openings 412 are arranged in the B direction.

Next, as shown in FIG. 9, in the second process portion M2(d), the intermediate product C1 is supported from the bottom flat portion 41 side and separated from the one end side support body 77. Specifically, the other end side supports 781 respectively support the top flat portions 42 of the intermediate product C1. The other end side support body 781 supports the intermediate product C1 by sandwiching the flat top side flat portion 42, for example. Then, by separating the other end side support body 781 from the one end side support body 77, the intermediate product C1 is separated from the one end side support body 77.

Then, the third step is performed. The third step is performed by the third step section M3 shown in FIG. In the illustrated example, the third step is performed for each intermediate product C1, but this is an example, and the third step is collectively performed for two or more intermediate products C1. It may be configured.

In FIG. 11A, the top side flat portion 42 side portion of the intermediate product C1 is supported by the other end side support body 781. In the illustrated example, the posture in which the B direction, which is the direction in which the bottom flat portion 41 extends, coincides with the y direction. In this case, the folding line 18 of the intermediate product C1 is located in the front when viewed in the z direction. Next, in FIG. 9B, the bottom flat portion 41 of the intermediate product C1 is joined along the direction B by, for example, heat sealing by the seal bar 782. Next, in FIG. 7C, the heat-sealed portion is cooled by the cooling unit 783. As a result, the first bottom seal portion 21 is formed on the intermediate product C1 as shown in FIG. In FIG. 6E, the intermediate product C1 is rotated 90 degrees around the x direction in preparation for the next step. In the present embodiment, the other end side support body 781 has such a rotating function.

FIG. 12 shows the intermediate product C1 after the first bottom seal portion 21 is formed. The first bottom seal portion 21 is a band-shaped seal portion extending in the B direction at the bottom end of the intermediate product C1 in the x direction. In the present embodiment, the intermediate product C1 is provided with a pair of bottom ventilation holes 25. The bottom ventilation hole 25 is a hole through which a space generated inside the intermediate product C1 communicates with the outside. In the illustrated example, the pair of bottom ventilation holes 25 are provided at positions away from the center of the intermediate product C1 in the B direction and near both ends in the B direction. Further, each bottom vent hole 25 is formed by setting a portion that is not partially heat-sealed in the heat-sealing by the seal bar 782 in FIG. 11. The unsealed portion forming the bottom ventilation hole 25 crosses the first bottom sealed portion 21 in the x direction.

FIG. 13: is a perspective view which shows the back process part Mpo of the packaging material manufacturing apparatus D1 for pouch containers. In the figure, for convenience of understanding, the case where the post-process is performed on one intermediate product C1 will be described as an example, but the post-process may be collectively performed on two or more intermediate products C1. Good. In the illustrated example, the top flat portion 42 of the intermediate product C1 is held by a holding tool 803 as shown in FIG. Further, the portion of the intermediate product C1 located on the bottom side of the top flat portion 42 is sandwiched by the support tool 831 and the pressing tool 841. Note that the holder 803 may be the one that the other end side support body 781 of the third process portion M3 shown in FIG. 11 is diverted as it is, or is a holder different from the other end side support body 781. May be. In the third step M3, the direction along the axial direction of the intermediate product C1 is the x direction, and the direction perpendicular to the x direction and the U direction of the intermediate product C1 are the y direction, and the x direction. And the direction perpendicular to the y direction is the z direction.

The support tool 831 and the pressing tool 841 are an example of a device configuration for performing a post process. The support 831 has a support surface 832. The support surface 832 is a flat surface that extends along the x direction and the y direction. The retainer 841 is arranged to face the support surface 832 of the support 831 in the z direction. The retainer 841 has, for example, a flat plate member. This flat plate-shaped member is movable in the x-direction while standing upright with respect to the xy plane. The flat plate-shaped member is rotatable about an axis extending in the y direction at a position described later. For such movement and rotation of the flat plate-like member, a known drive source such as a motor and a cylinder, a known mechanism including a rack and pinion mechanism, a crank mechanism, a link mechanism, and the like can be appropriately employed.

After the intermediate product C1 is sandwiched by the support surface 832 of the support 831 and the presser 841 as shown in FIG. 13A, the support 831 and the tubular film 1 are provided as shown in FIG. 13B. The pressing member 841 is lowered. At this time, one end of the retainer 841 slides on the intermediate product C1. Therefore, the gas (air) in the tubular film 1 sandwiched between the support tool 831 and the pressing tool 841 is discharged from the above-described bottom ventilation hole 25, and faces the z direction (B direction) of the intermediate product C1. The parts are brought close together. As a result, the intermediate product C1 has a form having the pair of main film portions 10 and the transition portion 12. The pair of main film portions 10 are portions folded by the support tool 831 and the pressing tool 841 and face each other in the z (B direction) direction and have the y direction (U direction) as the width direction. Further, one of the pair of main film portions 10 has a vertical seal portion 20. Further, as described above, although the vertical seal portion 20 is included in any of the main film portions 10, it is not located at the center in the y direction (U direction) which is the width direction of the main film portion 10. It is located off the center. The transition part 12 is interposed between the pair of main film parts 10 and the first bottom seal part 21 extending in the B direction, and connects them. Further, the transition portion 12 is a portion of the tubular film 1 to which the retainer 841 has not yet passed. Therefore, the gas (air) remains in the transition portion 12 and is inflated. Since the pair of folding lines 18 were provided at both ends of the tubular film 1 when wound on the intermediate roll 711, the tubular film 1 was formed into a pair of folding lines 18 in FIG. You can expect the effect of smoothly folding along.

FIG. 14 is a main-portion cross-sectional view showing a cross section in the xy plane that passes through the seal tape 20a of the intermediate product C1 in the state shown in FIG. As shown in the figure, in the vertical seal portion 20, a part of the tubular film 1 and the seal tape 20a overlap each other. Therefore, the vertical seal portion 20 has a high rigidity. As a result, the first bottom seal portion 21 is pushed to the left in the figure by the vertical seal portion 20, and can take a posture slightly inclined with respect to the x direction. FIG. 15 is a side view of essential parts showing the intermediate product C1, the support tool 831 and the pressing tool 841 in the state shown in FIG. 13(b). As shown in the figure, the support tool 831 has a flat plate shape having a support surface 832 extending along the xy plane. Therefore, the first bottom seal portion 21 (B direction) of the intermediate product C1 is inclined with respect to the z direction.

Next, as shown in FIG. 13C, the pressing member 841 is rotated around an axis extending in the y direction. FIG. 16 is a side view of essential parts showing the intermediate product C1, the support tool 831 and the pressing tool 841 in the state shown in FIG. 13(c). By the rotation of the pressing tool 841, the pressing tool 841 and the support tool 831 are closed with the transition portion 12 and the first bottom seal portion 21 of the intermediate product C1 being sandwiched. At this time, the gas (air) remaining in the transition portion 12 is discharged from the bottom ventilation hole 25. In parallel with this, the first bottom seal part 21 and the transition part 12 are folded in two by bringing both ends of the first bottom seal part 21 close to each other. Further, the first bottom seal part 21 and the transition part 12 are folded flat along the pair of main film parts 10.

As shown in FIG. 14, the first bottom seal portion 21 is pushed by the vertical seal portion 20 having high rigidity, so that the first bottom seal portion 21 is slightly moved toward the side without the vertical seal portion 20 (left side in the figure) in the x direction. Leaning. In addition, the first bottom seal portion 21 has a substantially uniform width over the entire length, and the entire first bottom seal portion 21 is inclined as shown in FIG. Therefore, in the folding process shown in FIGS. 13C and 16, the entire tilted first bottom seal portion 21 is folded so as to collapse to the tilted side. In FIG. 14, when the first bottom seal portion 21 is in a posture substantially parallel to the x direction, it is not stable in which direction the first bottom seal portion 21 falls in the folding process. For example, there is a concern that one half of the first bottom seal portion 21 may fall to the opposite side with respect to the other half. In the present embodiment, it can be expected that the first bottom seal portion 21 falls down to the side inclined by the vertical seal portion 20 with good reproducibility.

Further, as shown in FIG. 15, the intermediate product C1 is provided with a pair of bottom ventilation holes 25. In the state shown in FIGS. 14 and 15, gas (air) exists inside the transition section 12. On the other hand, in the state where the folding step shown in FIG. 16 is completed, almost no gas exists inside the tubular film 1. By providing the pair of bottom ventilation holes 25, gas can be more smoothly discharged to the outside of the tubular film 1 in the folding process. In addition, in the present embodiment, in FIG. 13C, even when the pressing tool 841 is in the fully closed state, as shown in FIG. 16, the bottom ventilation hole 25 is located below the pressing tool 841. Have a relationship.

Then, the 831 and the pressing tool 841 are removed. Then, as shown in FIG. 13D, two second bottom seal portions 22 each extending in the y direction (U direction) are provided on the transition portion 12 divided into two by heat sealing using the seal bar 87 or the like. Form.

The two second bottom seal parts 22 are parts where the inner surfaces of the respective parts of the bisected transition part 12 are joined. The heat sealing by the seal bar 87 is performed so that the vertical seal portion 20 and the first bottom seal portion 21 are sandwiched by the seal bar 87. By this method, the two second bottom seal portions 22 are simultaneously formed through one operation of sandwiching the transition portion 12 by the seal bar 87. FIG. 17 shows the intermediate product C1 immediately before the formation of the second bottom seal portion 22. As understood from the figure, both of the two second bottom seal portions 22 are configured to intersect with the first bottom seal portion 21. Further, one of the two second bottom seal portions 22 intersects with the vertical seal portion 20. Although the method of forming the two second bottom seal portions 22 at the same time has been described in the above process, the present invention is not limited to this, and the two second bottom seal portions 22 may be sequentially formed individually. Further, in FIG. 17, the region where the second bottom seal portion 22 is formed is shown by an imaginary line. As well shown in the figure, the second bottom seal portion 22 is formed closer to the upper end in the figure with respect to the portion of the vertical seal portion 20 existing along the y direction (U direction) in the transition portion 12. It Further, the second bottom seal portion 22 is formed above the bottom ventilation hole 25 in the x direction in the figure, in other words, the second bottom sealing portion 22 is formed between the bottom ventilation hole 25 and the main film portion 10 in the x direction. Formed in between. Then, as shown in FIG. 13E, the two second bottom seal portions 22 thus formed are cooled by the cooling portion 88.

Next, as shown in FIG. 13F, the intermediate product C1 is cut by the cutter 89 so as to vertically cut the pair of second bottom seal portions 22 in the y direction (U direction). As a result, the portions of the first bottom seal portion 21 and the transition portion 12 located outside the two second bottom seal portions 22 in the x direction are removed. As a result, as shown in FIG. 9G, the two second bottom seal portions 22 become the x-direction bottom side end portions of the intermediate product C1 in the folded state. Here, in FIG. 17, the cutting position in this step is indicated by a cutting line CL. The cutting line CL overlaps the second bottom seal portion 22. In the packaging material A1 for a pouch container obtained through such a cutting step, the transition portion 12, which remains as a part of the packaging material A1 for a pouch container after the cutting step, that is, the trapezoidal portion 10a and the bottom film portion 11 described later, are formed. The portion of the vertical seal portion 20 that was present along the y direction does not remain in a manner that clearly appears in the appearance. In the illustrated example, the cutting line CL does not overlap the portion of the vertical seal portion 20 that extends in the y direction. In such a case, a portion of the vertical seal portion 20 that was present along the y direction may have a structure that does not remain at all in the packaging material A1 for a pouch container described below. Note that, depending on the relative position between the cutting line CL and the vertical seal portion 20, it may be possible that the vertical seal portion 20 barely overlaps the second bottom seal portion 22 and remains. Further, as shown in FIG. 12, the pair of bottom ventilation holes 25 were provided near both ends of the first bottom seal portion 21. Therefore, in FIG. 17, the intermediate product C1 is located closer to the lower end in the x direction and is below the cutting line CL in the x direction. Therefore, after the intermediate product C1 is cut along the cutting line CL, the bottom ventilation hole 25 does not remain in the pouch container packaging material A1.

After this, for example, the spout 5 is inserted into the bottom side partial opening 412 of the bottom side flat portion 41. At this time, the spout 5 is preferably provided at a position retracted in the y direction with respect to the vertical seal portion 20, for example, arranged at the center of the pair of main film portions 10 in the y direction. In this case, the vertical seal portions 20 are provided at positions displaced from the center of the pair of main film portions 10 in the y direction. As a result, in the packaging material A1 for pouch container shown in FIG. 18, the spout 5 is arranged to be retracted from the vertical seal portion 20. Next, the ceiling seal portion 23 shown in FIG. 18 is formed by heat sealing using a seal bar or the like. The ceiling seal portion 23 is a portion where the ends in the x direction of the pair of main film portions 10 are joined together. Further, the portions of the pair of main film portions 10 that sandwich the spout 5 are joined to the spout 5 so as to maintain an internal sealed state. By passing through the above process, the packaging material A1 for pouch containers is obtained. The illustrated spout 5 is illustrated as being sealed by a lid component. In FIG. 18, the axial direction of the intermediate product C1 is defined as the x direction, the U direction is defined as the y direction, and the direction orthogonal to the x direction and the y direction is defined as the z direction. The same applies to FIGS. 19 to 22. Further, in the illustrated packaging material A1 for pouch container, the notch portions 17 are formed at both ends of the ceiling seal portion 23. For example, the cutout portion 17 may be formed by cutting a part of the tubular film 1 after forming the ceiling seal portion 23 on the intermediate product C1 shown in FIG. Alternatively, a cutout portion corresponding to the cutout portion 17 may be formed in the cutting by the cutter 761 shown in FIG. Further, the intermediate product C1 may not have the cutout portion 17.

18-21 has shown the packaging material for pouch containers based on 1st Embodiment of this invention. The packaging material A1 for a pouch container of the present embodiment is formed by the manufacturing method described above, and includes a pair of main film portion 10, a bottom film portion 11, a vertical seal portion 20, a first bottom seal portion 21, and a pair of main film portions 10. The second bottom seal portion 22, the ceiling seal portion 23, and the spout 5 are provided. Note that these components are defined on the assumption that the packaging material A1 for pouch container is flatly folded as illustrated. For example, when the packaging material A1 for pouch container is in the expanded state or in the folded state, each constituent element may have a mode different from the requirements described below. However, in the folded state shown in the figure, the present invention is intended as long as it meets the individual requirements.

The pair of main film portions 10 are members that form the majority of the packaging material A1 for pouch containers. The pair of main film portions 10 face each other in the z direction, and both ends in the y direction are integrally connected without a seal portion or the like. Therefore, continuous design printing can be performed on the entire surface of the body, and the designability can be improved. Further, the main film portion 10 located on the front side of the paper surface of the pair of main film portions 10 has a vertical seal portion 20. The vertical seal portion 20 vertically cuts the main film portion 10 in the x direction. Further, each main film portion 10 has a trapezoidal portion 10a. The trapezoidal portion 10a is located on the lower end side (second bottom seal portion 22 side) in the x direction, and has a width in the y direction toward the lower end side (second bottom seal portion 22 side) in the x direction. Is a trapezoidal area where is small. The lower side of the trapezoidal portion 10a is the lower end in the x direction of the main film portion 10, and the upper side of the trapezoidal portion 10a is an imaginary line that connects the upper ends of the oblique sides of the trapezoidal portion 10a in the figure and extends in the y direction. Further, each hypotenuse of the trapezoidal portion 10a is a bent portion 31.

As shown in FIG. 20 and FIG. 21, the vertical seal portion 20 overlaps with the portions that were the both end edges of the above-described strip-shaped film 1A, and the seal tape 20a is overlapped with the both end edges. It is bonded to the inner surface of the product by heat sealing or the like.

The bottom film portion 11 is folded and sandwiched between the pair of trapezoidal portions 10a. The bottom film part 11 is connected to two lower sides and four oblique sides of the pair of trapezoidal parts 10 a of the pair of main film parts 10. The bottom film portion 11 and the two lower sides of the pair of trapezoidal portions 10a are connected to each other via a pair of second bottom seal portions 22 described later. In addition, the bottom film portion 11 and the four oblique sides of the pair of trapezoidal portions 10 a are connected to each other via the bent portion 31.

The first bottom seal portion 21 reaches the lower sides of the pair of trapezoidal portions 10 a and crosses the bottom film portion 11. The first bottom seal portion 21 is formed by joining both side portions of the bottom film portion 11 in the y direction by heat sealing or the like. The first bottom seal portion 21 is folded and sandwiched between the pair of trapezoidal portions 10 a together with the bottom film portion 11.

Each of the pair of second bottom seal portions 22 is formed by joining the pair of trapezoidal portions 10a in the x direction (bottom side) and the end portion of the bottom film portion 11 adjacent to the end portion by heat sealing or the like. Is. Each second bottom seal portion 22 extends in the y direction. The length of the second bottom seal portion 22 is smaller than the y-direction dimension of the rectangular portion located above the main film portion 10 in the x direction in the drawing. Further, the vertical seal portion 20 reaches the one of the pair of second bottom seal portions 22 located on the front side of the paper surface. The arrival position of the vertical seal portion 20 is avoiding the center of the second bottom seal portion 22 and is near one end of the second bottom seal portion 22.

The ceiling seal portion 23 is formed by joining the pair of main film portions 10 at their upper ends in the x direction in the figure by heat sealing or the like. By forming the pair of main film portion 10, bottom film portion 11, first bottom sealing portion 21, pair of second bottom sealing portion 22 and ceiling sealing portion 23, the contents of the packaging material A1 for pouch container are An accommodation space 19 for accommodating the is provided. A pair of notches 17 are provided at both ends of the ceiling seal portion 23 in the y direction.

The spout 5 is sandwiched between the upper end portions of the pair of main film portions 10 in the x direction as shown in FIG. 17, and as a part of the ceiling seal portion 23, the spout 5 is sealed with the pair of main film portions 10. Is joined to. The spout 5 is used as a filling port for filling the accommodation space 19 with the contents and a spout for pouring the contents. In addition, the spout 5 shown in the figure has a lid component attached thereto. In the packaging material A1 for a pouch container which is not yet filled with the contents, the lid component may not be attached.

FIG. 22 shows a pouch container manufactured using the pouch container packaging material A1. In the pouch container B1, the content 6 is filled in the accommodation space 19 of the packaging material A1 for the pouch container, and the content 6 is accommodated in a sealed state by mounting the lid component on the spout 5. ..

To manufacture the pouch container B1, the packaging material A1 for the pouch container is prepared, and the contents 6 are filled by inserting a nozzle into the spout 5 or the like. Then, by mounting the above-mentioned lid component on the spout 5, the packaging material A1 for a pouch container is sealed and the accommodation space 19 is hermetically sealed. Thereby, the pouch container B1 is obtained.

FIG. 22 is a view of the pouch container B1 accommodating a predetermined amount of contents 6 when viewed from diagonally below when the spout 5 is in a posture in which the spout 5 faces upward in the vertical direction. As can be seen from the figure, the first bottom seal portion 21 and the pair of second bottom seal portions 22 form a flat bottom surface for each part of the bottom film portion 11. The four bent portions 31 are opened by the weight of the contents 6. Thus, in this example, one end side of the intermediate product C1 is the bottom side of the pouch container B1, and the other end side is the top side of the pouch container B1.

Next, the operation of the method for manufacturing the packaging material A1 for pouch container and the operation of the packaging material manufacturing device D1 for pouch container will be described.

According to the present embodiment, as shown in the second process portion M2(a) of FIG. 5, after the intermediate product C1 is supported by the one end side support body 77, as shown in FIGS. By separating the first support pin 771 (first support surface 770) in the z direction, a part of the intermediate product C1 is flattened in a direction intersecting with the U direction that coincides with the direction in which the pair of folding lines 18 are separated. Change. Then, the bottom flat portion 41, which is flat in the direction in which the pair of first support surfaces 770 are separated, is formed. This makes it possible to form the bottom flattened portion 41 flattened along the direction intersecting the direction in which the pair of folding lines 18 are separated from each other, as compared with, for example, a manual process.

Further, in the present embodiment, the one end side support body 77 has a pair of second support pins 779 (second support surface 778) in addition to the pair of first support pins 771 (first support surface 770). Then, as shown in FIG. 6, in the step of changing the intermediate product C1 into a flat shape, the intermediate product C1 is moved so that the inner surface of the intermediate product C1 contacts the pair of first supporting surfaces 770 and the pair of second supporting surfaces 778. The state in which the item C1 has tension is maintained. Thereby, when the pair of first support pins 771 are separated from each other and the pair of second support pins 779 are approached, the intermediate product C1 is displaced with respect to the pair of first support pins 771 and the pair of second support pins 779. It is possible to more surely prevent the accident.

Further, before the step of inserting the one end side support body 77 into the intermediate product C1, the top flat portion 42 is formed in the intermediate product C1. Therefore, as shown in FIG. 7, in the steps after the step of changing the intermediate product C1 into a flat shape, the part of the intermediate product C1 on which the top flat portion 42 is formed is arranged along the U direction. The flat shape can be reliably maintained.

The intermediate product C1 is also provided with a bottom flat portion 41 and a top flat portion 42 that are flattened along the directions intersecting with each other. Such an intermediate product C1 is preferable for manufacturing the packaging material A1 for pouch container shown in FIG. 18 and for manufacturing the pouch container B1 shown in FIG. By using the bottom flat portion 41 and the top flat portion 42, it is possible to more easily provide the first bottom seal portion 21 and the top seal portion 23 extending in the direction intersecting with each other, and the pouch container B1 can be provided. Suitable for self-reliance.

Since the first support pin 771 is made of a material such as stainless steel that is relatively resistant to friction and corrosion, it is possible to prevent foreign matter such as fine powder of the first support pin 771 from adhering to the inside of the intermediate product C1. This is preferable when food etc. are selected as the content 6 of the packaging material A1 for pouch containers.

As shown in FIG. 4, the top flat portion 42 includes a pair of top partial seal portions 421 located near both ends in the U direction. Such a pair of top side partial seal portions 421 is suitable for maintaining the top side flat portion 42 in a flat shape extending in the U direction. Further, a top side partial opening 422 is provided in a portion of the top side flat portion 42 near the center in the y direction. The top-side partial opening 422 is suitable for use as a site for inserting the spout 5 in the pouch container packaging material A1 shown in FIG.

As shown in FIG. 9, the one end side support body 77 includes a pair of first support pins 771 and a pair of second support pins 779. Since there is a space between the pair of first support pins 771 and the pair of second support pins 779, the intermediate product C1 is positioned between the pair of first support pins 771 and the pair of second support pins 779. A bottom side partial seal portion 411 can be formed in the portion by the bottom side flatness maintaining portion 776. Therefore, the bottom partial seal portion 411 can be appropriately formed by the one end side support body 77 (a pair of first support pins 771) while keeping the intermediate product C1 in a flat shape in the B direction.

As shown in FIG. 13, two second bottom seal portions 22 are simultaneously formed in a state where the first bottom seal portion 21 and the transition portion 12 are folded so as to be divided into two parts. Therefore, it is not necessary to inflate or erect the tubular film 1 into a substantially cylindrical shape in the step of forming the second bottom seal portion 22 or the like. Further, the processing for the folded tubular film 1 is suitable for being performed on an automated production line. Then, in the present embodiment, the gas (air) between the pair of main film portions 10 is discharged, and the transition portion 12 is inflated and folded so as to be divided into two. According to such a method, it is possible to smoothly fold the transition portion 12 while preventing the transition portion 12 and the first bottom seal portion 21 from being unduly distorted or bent. Therefore, the manufacturing efficiency of the packaging material A1 for pouch containers can be improved. Then, the pouch container B1 manufactured using the packaging material A1 for pouch container formed through such steps can be made to stand on a flat shelf plate or the like, and suppresses discomfort when gripped. be able to.

A pair of bottom ventilation holes 25 is formed in the intermediate product C1. Thereby, the gas (air) inside the tubular film 1 can be smoothly discharged to the outside of the tubular film 1 through the bottom ventilation hole 25. Further, the pair of bottom ventilation holes 25 are arranged on both ends of the first bottom seal portion 21 with a space therebetween. For this reason, it is possible to prevent the gas (air) from remaining in a corner or the like near the first bottom seal portion 21 of the intermediate product C1. Further, in the present embodiment, the vicinity of both ends of the first bottom seal portion 21 protrudes downward in the x direction from the presser 841 in the post-process portion Mpo(j) shown in FIGS. 13 and 16. As a result, even if the pressing tool 841 is completely closed, the bottom ventilation hole 25 is not closed by the pressing tool 841. This is suitable for discharging the gas (air) in the tubular film 1 more smoothly and more completely.

The bottom ventilation hole 25 is formed by the unsealed portion of the first bottom sealing portion 21. Therefore, by performing the process of forming the first bottom seal portion 21, the bottom vent hole 25 can be formed together. This is preferable for improving the manufacturing efficiency because it is not necessary to perform another process for forming the bottom ventilation hole 25.

The vertical seal portion 20 reaches the second bottom seal portion 22 instead of the bent portion 31. In other words, the vertical seal portion 20 does not exist in the bottom film portion 11. This can prevent the vertical seal portion 20 from appearing excessively in the appearance of the pouch container packaging material A1 and improve the strength of the pouch container packaging material A1. Specifically, unlike the present embodiment, in FIG. 18, when the vertical seal portion 20 reaches the bent portion 31, the vertical seal portion 20 is folded back by approximately 90 degrees at the bent portion 31, and the bottom film portion is folded. It will appear in 11. Further, the bottom film portion 11 is a member forming the bottom surface of the pouch container B1, and when the vertical seal portion 20 is formed on the bottom film portion 11, when the pouch container B1 is placed on, for example, a product shelf or the like. However, the vertical seal portion 20 may come into contact with the product shelves and cause a decrease in strength. According to this embodiment, the vertical seal portion 20 does not appear on the bottom film portion 11, which is preferable for improving the appearance and strength.

Further, the vertical seal portion 20 is provided at a position avoiding the spout 5 in the y direction. The spout 5 that functions as a filling port or a spout has a tubular shape as a basic shape, and is difficult to have a flat shape. Therefore, it is not easy to join the pair of main film portions 10 with good sealing property. If the vertical seal portion 20 exists at such a difficult-to-join location, the hermeticity of the spout 5 may deteriorate. According to this embodiment, such a concern can be dispelled.

23 to 27 show a modification of the present invention. Note that, in these drawings, the same or similar elements as those in the above-described example are denoted by the same reference numerals as those in the above-described embodiment.

FIG. 23 shows a modification of the second process unit M2. In this modification, the second process unit M2 includes a mark sensor 777. The mark sensor 777 is for detecting the position of the mark 151 provided at a predetermined position of the intermediate product C1. As the mark 151, for example, a mark provided by printing on a film material before forming the tubular film 1 can be cited. The mark sensor 777 may be, for example, a CCD camera or a photo sensor.

Further, in this modification, one of the pair of first support pins 771 (the first support pin 771 on the upper side in the z direction in the drawing) is rotatable around the z direction. For example, the first support pin 771 is rotationally driven by a motor included in the drive unit 772. For example, after the pair of first support pins 771 are separated from each other in the z direction to change the portion on the one end side opening 410 side of the intermediate product C1 into a flat shape along the z direction, the mark sensor 777 is used to change the mark 151. It is detected whether is located at a predetermined position. When the mark 151 is displaced from the predetermined position, the mark 151 is moved to a predetermined position by feedback control of the motor of the driving unit 772, for example.

Even with such a modification, the intermediate product C1 having the bottom flat portion 41 can be efficiently manufactured. Further, the bottom partial seal portion 411 can be formed at a more accurate position with respect to the pair of folding lines 18. Further, instead of rotating the first support pin 771, a structure may be provided that includes a rotating unit that rotates by interposing the intermediate product C1 between the first support pin 771 and the first support pin 771. Since such rotating means is in contact with the outer surface of the intermediate product C1, for example, when the rotating device is made of silicone resin or rubber, these fine powders and the like adhere to the inside of the intermediate product C1. There is little fear.

FIG. 24 shows another modification of the method for manufacturing the packaging material A1 for pouch container and the apparatus D1 for manufacturing packaging material for pouch container. In the present modification, in the first process portion M1, the intermediate film C1 is formed by cutting the tubular film 1 with a cutter 761 at a predetermined pitch, and then the formation of the top flat portion 42 is omitted. The intermediate product C1 is formed from the tubular film 1 having a pair of folding lines 18, and exerts a restraining force for maintaining the pair of folding lines 18 in a folded state. Therefore, also in the steps after the illustrated second step M2(b), the pair of folding lines 18 is formed on the side of the intermediate product C1 opposite to the side on which the bottom flat portion 41 is formed in the x direction. It can be maintained in a flat shape with Ryota. Therefore, for example, the top flat portion 42 can be appropriately formed in the illustrated second step portion M2(b) or in subsequent steps.

FIG. 25 shows another modification of the method for manufacturing the pouch container packaging material A1 and the pouch container packaging material manufacturing device D1. In this modification, the first bottom seal portion 21 is formed on the intermediate product C1 in the second process portion M2(b). The first bottom seal portion 21 crosses the intermediate product C1 in the z direction. Therefore, in the illustrated example, the first bottom seal portion 21 may be provided at a position avoiding the pair of first support pins 771 in the x direction. Further, in this modification, the first bottom seal portion 21 corresponds to the bottom flat portion.

FIG. 26 shows another modification of the method for manufacturing the packaging material A1 for a pouch container and the packaging material manufacturing device D1 for a pouch container. In this modification, in the second process section M2, the x-direction length of the pair of first support pins 771 and the pair of second support pins 779 is longer than that in the above-described example, and for example, the x-direction length of the intermediate product C1. The length is said to occupy the majority. Therefore, the state of the second process portion M2(d) in which the pair of first support pins 771 (first support surface 770) are separated from each other and the pair of second support pins 779 (second support surface 778) are close to each other Then, substantially the entire intermediate product C1 is kept flat along the z direction. Then, in the present modification, a part of the intermediate product C1 closer to the other end (closer to the one end side opening 410) is joined to each other, whereby the bottom side partial seal part 411 (bottom side flat part 41). ) Is formed. After that, for example, when the intermediate product C1 is removed from the one end side support body 77 by supporting the bottom side flat portion 41 by the above-mentioned other end side support body 781, the recovery force of the pair of folding lines 18 causes an intermediate state. The one end side portion of the product C1 returns to a flat shape having the pair of folding lines 18 at both ends. Then, the top flat portion 42 is formed on the one end side portion of the intermediate product C1. Thus, in this modification, one end side of the intermediate product C1 is the top side of the pouch container B1, and the other end side is the bottom side of the pouch container B1. Note that the first bottom seal portion 21 may be formed instead of the configuration in which the bottom flat portion 41 is formed.

FIG. 27 shows another modification of the method for manufacturing the packaging material A1 for pouch container and the apparatus D1 for manufacturing packaging material for pouch container. In the present embodiment, the one end side support body 77 is configured only by the pair of first support pins 771 (the pair of first support surfaces 770), and the pair of second support pins 779 (the pair of second support surfaces 770). 778). For this reason, after inserting the pair of first support pins 771 approaching in the z direction from the one end side opening portion 410 of the intermediate product C1, the pair of first support pins 771 are separated in the z direction. At least a part of the product C1 is changed into a flat shape along the z direction. As described above, the one end side support body 77 may have a configuration including the pair of first support surfaces 770. In the present modification, from the viewpoint of preventing the position shift of the intermediate product C1, for example, the mark 151 provided on the intermediate product C1 is detected by the mark sensor 777, and the first support pin 771 is rotated by the driving unit 772. A configuration for adjusting the position of the intermediate product C1 is preferable.

The method for manufacturing a packaging material for a pouch container and the apparatus for manufacturing a packaging material for a pouch container according to the present invention are not limited to the above-described embodiments. The specific configuration of the method for producing a packaging material for a pouch container and the apparatus for producing a packaging material for a pouch container according to the present invention can be changed in various ways.

A1: Pouch container packaging material B1: Pouch container C1: Intermediate product CL: Cutting line D1: Pouch container packaging material manufacturing device M1: First process part M2: Second process part M3: Third process part Mpo: Post process Part 1: Cylindrical film 1A: Strip film 5: Spout 6: Content 10: Main film part 10a: Trapezoidal part 11: Bottom film part 12: Transition part 17: Notch part 18: Folding line 19: Storage space 20: Vertical seal part 20a: Seal tape 21: First bottom seal part 22: Second bottom seal part 23: Top seal part 25: Bottom ventilation hole 31: Bend part 41: Bottom flat part 42: Top flat part 77: One end Side support 87: Seal bar 88: Cooling part 89: Cutter 101: Base film layer 102: Sealant layer 103: Barrier layer 104: Intermediate layer 151: Mark 410: One end side opening 411: Bottom side partial sealing part 412: Bottom Side partial opening portion 421: Top side partial sealing portion 422: Top side partial opening portion 711: Intermediate roll 761: Cutter 762: Top side flatness maintaining portion 763: Slide stage 770: First supporting surface 771: First supporting pin 772: Drive unit 776: Bottom flattening maintaining unit 777: Mark sensor 778: Second supporting surface 779: Second supporting pin 781: Other end side supporting member 782: Seal bar 783: Cooling unit 803: Holding member 831: Supporting member 832: Support surface 841: Presser

Claims (4)

A method for manufacturing a packaging material for a pouch container used for a pouch container,
From one end in the axial direction of the tubular film folded so as to have a pair of folding lines at both ends in the direction perpendicular to the axial direction, the pair of folding lines intersect at a predetermined angle with respect to the direction in which they are separated. Inserting one end side support bodies having a pair of first support surfaces arranged on opposite sides in a first direction which is a direction,
A step of changing at least a part of the tubular film into a flat shape along the first direction by separating the pair of first support surfaces from each other in the first direction;
A step of forming a bottom flat portion that is maintained flat along the first direction by joining at least parts of the tubular films while being supported by the one end side support body. When,
Equipped with
The one end side support further has a pair of second support surfaces arranged on opposite sides in a second direction which is a direction intersecting the first direction,
In the step of inserting the one end side support, the second direction is inserted in a posture in which the second direction is along a direction in which the pair of folding lines are separated from each other,
In the step of changing to the flat shape, while maintaining the state in which the tubular film has tension so that the inner surface of the tubular film contacts the pair of first supporting surfaces and the pair of second supporting surfaces. , The pair of first supporting surfaces are separated from each other in the first direction and the pair of second supporting surfaces are close to each other in the second direction,
In the step of forming the bottom flat portion, two bottom partial seals in which parts of the tubular film are sealed at positions spaced from each other with the second support surface sandwiched in the first direction. And a bottom side partial opening opening in the axial direction,
After the step of forming the bottom flat portion, a band-shaped first bottom seal portion extending in the first direction is formed by sealing an area of the bottom flat portion including the two bottom partial seal portions. further comprising wherein the Rukoto method of a pouch container for packaging material a step of. Before the step of inserting the one end side support body, by joining at least a part of the tubular film closer to the other end in the axial direction than the site where the bottom flat portion is formed, the pair The method for producing a packaging material for a pouch container according to claim 1, further comprising the step of forming a top flat portion that is maintained flat along a direction in which the folding lines of (1) are separated from each other. In the step of forming the top flat portion, the top partial seal portion in which a part including both ends in the direction in which the pair of folding lines are separated is sealed, and the top partial opening portion that opens in the axial direction The manufacturing method of the packaging material for pouch containers of Claim 2 including formation of. An apparatus for manufacturing a packaging material for a pouch container used for a pouch container,
Inserted from one end in the axial direction of the tubular film folded so as to have a pair of folding lines at both ends in the direction perpendicular to the axial direction, a predetermined angle is formed with respect to the direction in which the pair of folding lines are separated from each other. One end side support bodies having a pair of first support surfaces arranged on opposite sides in a first direction which is a direction intersecting with each other and capable of approaching and separating in the first direction,
Flattening along the first direction by joining at least a part of the tubular films in a state where the pair of first support surfaces are supported by the one end side support bodies separated in the first direction. A bottom flattening maintaining portion that forms a bottom flattened portion that is maintained in a state of
Equipped with
The one end side support body further includes a pair of second support surfaces which are arranged on opposite sides in a second direction which is a direction intersecting with the first direction and which can approach and separate in the second direction. In addition, the second direction is inserted into the tubular film in a posture along the direction in which the pair of folding lines are separated from each other,
The bottom flattening maintaining portion maintains the state in which the tubular film has tension so that the inner surface of the tubular film contacts the pair of first supporting surfaces and the pair of second supporting surfaces, and Forming the bottom flat portion after the first support surfaces of the pair of second support surfaces are separated from each other in the first direction and the pair of second support surfaces are close to each other in the second direction,
In the bottom-side flatness maintaining portion, two bottom-side partial sealing portions in which parts of the tubular film are sealed at positions spaced from each other with the second supporting surface interposed therebetween in the first direction, The bottom flat portion including a bottom partial opening opening in the axial direction,
Further Ru comprising a first bottom seal portion forming portion for forming a first bottom seal portion of the strip extending in the first direction by sealing the region including the two bottom portions sealed portion of said bottom planar portion The manufacturing apparatus of the packaging material for pouch containers characterized by the above.

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