JP2010111419A - Packing bag, method of manufacturing the packing bag, and bag-making and filling/packing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing bag having a stabilized hot-melt bond in an inward folded portion of a film without boring the film. <P>SOLUTION: A standing pouch 100 is made by hot melt-bonding the outer circumference of a laminate film 110 of a base layer 111 and a hot melt bonding layer 112 with the hot melt bonding layer 112 placed inward. The bottom of the standing pouch 100 is constructed by inward folding the film 110, and the standing pouch 100 can stand by itself by spreading the folded portion. When the film 110 is inward folded in both sides in the widthwise direction of the bottom of the standing pouch 100, the base layer 111 in the folded portion 113 of the base layers 111 facing each other is removed with the hot melt bonding layer 112 left, and the film 110 is hot melt bonded in the portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packaging bag which is preferably a standing pouch, and more particularly to a packaging bag manufactured using a film in which at least a base material layer and a heat fusion layer are laminated. Furthermore, the present invention relates to a method for manufacturing such a packaging bag and a bag making and filling machine suitable for manufacturing such a packaging bag.

  Standing pouches are widely used as packaging bags that enclose fluid contents such as liquids and pastes because they are self-supporting and have excellent display effects at stores and are less bulky than packaging boxes. There are various methods for producing a package in which the contents are enclosed in a standing pouch. Among them, as one of methods for efficiently producing a standing pouch, a roll as disclosed in Patent Document 1 is used. There is a method in which a standing pouch is formed from a wound long film and the contents are continuously filled therein.

  In the standing pouch disclosed in Patent Document 1, the film is folded inward at the bottom portion so that the bottom portion can be spread and self-supported, and in this state, the both side portions of the standing pouch are inward. A horizontal seal portion is formed over the entire height direction of the standing pouch by heat-sealing including the folded film portion. As a result, the film is quadrupled at a part of the horizontal seal portion.

  In the production of a standing pouch using heat fusion of a film, a film in which a base material layer and a heat fusion layer are laminated is generally used, and the standing pouch is produced with the base material layer facing outside. The heat fusion of the film is performed by causing the heat fusion layers to face each other and pressurizing and heating the film from the base material layer side with a heat sealer to melt only the heat fusion layer. Therefore, in the part where the film of the horizontal seal | sticker part became 4 layers, since the base material layers have opposed the film for two inside, it is not heat-seal | fused. As a result, the film opens at the lateral seal portion at the bottom of the standing pouch, and the standing pouch becomes unstable.

Therefore, in the conventional standing pouch, as shown in FIG. 14, two holes 115 are formed in the film portion that is folded inward among the four portions of the film of the lateral seal portion. The two holes 115 are opened at positions where they overlap each other with the film folded. At the position where the hole 115 is opened, the film has 112 heat-bonding layers facing each other through two overlapping holes, and the film can be heat-sealed at this position. By making a hole in the film, the film is heat-sealed at the position where the hole is made even at the part where the film of the horizontal seal part is folded inward, so the film opens at the horizontal seal part at the bottom of the standing pouch. The standing pouch can be made stable and independent.
JP 2000-062707

  However, the conventional standing pouch described above has the following problems due to the formation of holes in the film.

  The hole in the film is usually formed by punching the film with a punch. For this reason, the portion where the film is folded inward has a thickness equivalent to four films, but there is only a thickness equivalent to two films at the positions where the holes are formed. Therefore, when forming a horizontal seal | sticker part, a heat sealing machine will pressurize the part in which the area | region which has the thickness for two films exists in the area | region which has the thickness for four films. For this reason, the pressure applied to the film is reduced at the position where the hole is formed, and as shown in FIG. 15, a gap 116 is formed in the inner peripheral portion of the hole. It was.

  In addition, as disclosed in Patent Document 1, when filling the contents while forming a standing pouch from a long film wound around a roll, a hole is formed in the film while the film is fed out. It is common to carry out in a series of steps from the formation of the pouch to the filling of the contents. Therefore, if the punched film piece is not reliably removed, the film piece may be mixed into the standing pouch. In order to remove the film piece, a film piece removing apparatus such as a suction machine for removing the film piece by vacuum suction is required, and as a result, the configuration of the entire apparatus for manufacturing the standing pouch becomes complicated. Further, the punch used for punching the film is worn as the film is repeatedly punched, resulting in poor punching of the film. Therefore, maintenance such as periodic replacement of the punch is necessary so as not to cause punching defects, and the maintenance work is complicated.

  Therefore, an object of the present invention is to stably perform heat fusion at a portion where the film is folded inward without making a hole in the film.

To achieve the above object, the packaging bag of the present invention uses a film in which a heat-sealing layer and at least one base material layer are laminated, and the packaging bag is made so that the heat-sealing layer is on the inside. Because
At least one folding part formed by partially folding the film to the heat-sealing layer side;
In order to hermetically seal the inside, a heat seal part formed by heat-sealing the heat-seal layers facing each other at a predetermined part including a part of the folded part,
Auxiliary fusion parts formed by partially heat-sealing portions of the folds facing each other,
Have
The auxiliary fusion part thermally fuses the portions of the film that have been formed in advance on the film at positions facing each other of the folding part and from which the base material layer has been removed leaving the thermal fusion layer. It is formed by this.

  The packaging bag of the present invention is particularly suitable for a standing pouch. In this case, the folding portion constitutes a bottom portion that allows the standing pouch to be self-supported by being folded inward over the entire width of the standing pouch. The auxiliary fusion part is preferably formed on both sides in the width direction of the standing pouch. Furthermore, in this case, the heat seal part has a top seal part formed on the upper edge of the standing pouch and a horizontal seal part formed on both side edges of the standing pouch. More preferably, it is formed in the region.

The method for producing a standing pouch according to the present invention includes a step of preparing a long film in which a heat fusion layer and at least one base material layer are laminated,
Both ends of the film in the width direction face each other so that the heat-sealing layer is on the inside, and both ends of the film in the width direction facing each other are heat-sealed along the longitudinal direction of the film to form the cylinder And a process of
Folding a part of the film along the longitudinal direction of the film toward the heat-fusible layer, and forming at least one fold in the film;
A step of introducing the contents into the inside of the tubular film;
Sealing the contents by thermally fusing the film loaded with the contents over its entire width;
Prior to the step of forming the folded portion, the thermal fusion bonding is performed at a position opposite to each other in the portions of the film that are folded in the step of forming the folded portion and thermally fused in the step of sealing the contents. Forming a base material layer removing portion from which the base material layer is removed leaving a layer;
After the step of forming the folding portion, there is a step of thermally fusing the film at a position where the base material layer removal portion is formed to form an auxiliary fusion portion.

  In the method for manufacturing a packaging bag of the present invention, when the packaging bag is a standing pouch, the step of forming the film into a cylindrical shape is performed by thermally fusing both end portions in the width direction of the film in the longitudinal direction of the film. Forming the top seal portion, and sealing the contents includes heat-sealing the film over the entire width and cutting the film at the heat-sealed portion to form the horizontal seal portion of the standing pouch. Forming.

  Moreover, in the manufacturing method of the packaging bag of this invention, it is preferable that the process of forming a base material layer removal part includes melt-removing the base material layer by irradiating a laser beam locally. Further, the step of forming the auxiliary fusion part may be a step common to the heat fusion over the entire width of the film in the step of sealing the contents.

The bag making filling and packaging machine of the present invention fills the contents by forming a bag by heat fusion while feeding a long film laminated with a heat fusion layer and at least one base material layer downward A bag making filling and packaging machine,
An input pipe arranged in a vertical direction to input the contents;
At least one film folding mechanism that folds the film inward along the longitudinal direction of the film in a state in which the outer periphery of the input pipe is surrounded with the heat sealing layer as the inner side, and forms a folded portion in the film When,
A first sealing mechanism for heat-sealing the open end of the film surrounding the outer periphery of the input pipe along the longitudinal direction of the film;
A second sealing mechanism that is disposed below the charging pipe and heat-sealed over the entire width of the film heat-sealed by the first sealing mechanism;
The portions of the film that are disposed upstream of the film folding mechanism in the film feeding direction, are folded by the film folding mechanism, and are heat-sealed by the second seal mechanism are positioned at positions opposite to each other. A base material layer removing device for forming a base material layer removing portion from which the base material layer has been removed leaving a fusion layer;
Have

  In the bag making filling and packaging machine of the present invention, the film folding mechanism is a push plate disposed on the opposite side of the first seal mechanism between the input pipes so as to form one folding portion in the central portion in the width direction of the film. Thus, a configuration suitable for manufacturing a standing pouch is obtained. Moreover, the bag making filling packaging machine of this invention WHEREIN: It is preferable that a base material layer removal apparatus is a laser marker which melts and removes the said base material layer by irradiation of a laser beam.

  In the present invention, the “width direction” is used in two cases: the width direction of the packaging bag and the width direction of the film. The width direction of the packaging bag is, for example, the width direction when viewed from the front in a normal posture (such as a standing pouch in a standing pouch), such as when the packaging bag is displayed at a storefront, that is, the left-right direction when viewed from the front. means. On the other hand, the width direction of the film means a direction perpendicular to the longitudinal direction (film feeding direction) of the film at the time of manufacturing the packaging bag. Depending on the form of the packaging bag, the width direction of the packaging bag and the width of the film The directions may be the same or different.

  According to the present invention, in the packaging bag having the folded portion, the auxiliary fused portion formed by partially heat-sealing the portions of the folded film facing each other, leaving the thermal fusion layer. By forming the film by heat-sealing at the portion from which the base material layer has been removed, the film can be stably heat-sealed at the folded portion.

  In addition, by removing the base material layer by melting the base material layer by irradiating a laser beam, no dust is generated due to the removal of the base material layer, and the dust enters the inside of the packaging bag as a foreign matter. There is no. Therefore, an accessory device for removing dust generated by removing the base material layer is not necessary, and the device configuration is simplified. Furthermore, the maintenance of the apparatus is easier compared with the case where a part of the film is removed by punching.

  Next, embodiments of the present invention will be described with reference to the drawings.

  Referring to FIGS. 1 and 1A, a standing pouch 100 according to an embodiment of the present invention is shown having a front surface 100a, a back surface 100b, and a bottom surface 100c formed by heat fusing films. The standing pouch 100 is formed at the heat seal portion formed along the outer periphery thereof, that is, the top seal portion 101 formed at the upper edge of the standing pouch 100, the horizontal seal portion 102 formed at both side edges, and the bottom edge. The inside is sealed by the bottom seal portion 103. The bottom seal portion 103 is formed by folding the film inward over the entire width of the standing pouch 100 so that the overlapping portions of the film are thermally fused on both sides of the folded portion. The standing pouch 100 is configured such that it can stand on its own by widening the bottom part folded inside.

  The bottom seal portion 103 is a portion that functions as a rib for facilitating the standing pouch 100 to be self-supporting, and may not be necessary depending on the rigidity of the film used and the type of contents.

  At the bottom of the standing pouch 100 where the film is folded inward, an auxiliary fusion portion 104 is formed in the region of the lateral seal portion 102 located on both sides in the width direction of the standing pouch 100.

  For the production of the standing pouch 100, as shown in FIG. 2, a film 110 in which a base material layer 111 made of a resin that does not melt by thermal fusion and a thermal fusion layer 112 made of a resin that melts by thermal fusion are laminated. Is used. The standing pouch 100 is formed by folding the film 110 with the heat-sealing layer 112 inside, and heat-sealing the heat-sealing layers 112 facing each other at an appropriate location, so that the top seal portion 101, the horizontal seal portion 102, and the bottom seal portion It can be manufactured by forming 103.

  As the film 110, any film generally used for manufacturing the standing pouch 100 can be used as long as it has the base material layer 111 and the heat fusion layer 112 as described above. Specific examples of the resin constituting the base material layer 111 include nylon, polypropylene, polyamide, and polyester. Specific examples of the resin constituting the heat-fusible layer 112 include polyethylene resins and polypropylene resins. Among these resins, a preferable combination is a film in which the heat sealing layer 112 is made of polyethylene and the base material layer 111 is made of nylon.

  The number of the layers of the film 110 is not limited to two. If the innermost layer is the heat fusion layer 112 when the standing pouch 100 is used, for the purpose of providing gas barrier properties, mechanical strength, light shielding properties, or the like. Depending on the function required for the standing pouch 100, the base material layer 111 can be composed of a plurality of layers. In this case, the layer added to the base material layer 111 is not limited to resin, but may be metal foil such as aluminum foil. A preferable specific example in the case where the film 110 has a three-layer structure is a film in which polyethylene, nylon, and polyethylene terephthalate (PET) are laminated in this order from the heat fusion layer 111 side.

  Further, the standing pouch 100 may be composed of a single film 110 that continues from the front surface 100a to the back surface 100b via the bottom surface 100c. The front surface 100a, the back surface 100b, and the bottom surface 100c may be formed of different films 100, and may be combined by heat fusion.

  Since a laminated film is used as the film 110, as shown in FIG. 2, at the bottom of the standing pouch 100 in which the film 110 is folded inward to form a quadruple layer, the film 110 is folded inwardly at a folding portion 113. The material layers 111 are opposed to each other, and the region cannot be heat-sealed. Therefore, in the present embodiment, the base material layer removing portion 111a is formed in the portion of the film 110 where the base material layers 111 of the folded portion 113 where the horizontal seal portion 102 (see FIG. 1) is formed are opposed to each other. Yes. The base material layer removing portion 111a is a portion where the base material layer 111 is removed leaving the heat sealing layer 112 so that the heat sealing layer 112 is exposed from the base material layer 111 side of the film 110, and a folded portion. 113 are formed at positions facing each other.

  Since the base material layer removing portion 111a is formed, the heat sealing layers 112 face each other in the region where the base material layer removing portion 111a is formed, and the folding portion 113 forms a base material by forming the lateral seal portion 102. The region where the layer removal portion 111a is formed is heat-sealed. This heat-sealed region is the auxiliary fusion part 104 shown in FIG.

  In the auxiliary fused portion 104, only the base material layer 111 for two layers is removed from the portion where the film 110 is quadrupled. Therefore, the difference in thickness between the region where the base material layer removing portion 111a is formed and the other region in the folded portion 113 is smaller than that in the case where a hole is formed in the film 110 by punching as in the prior art. Therefore, the film 110 can be pressed and heated more evenly when the lateral seal portion 102 is formed. Further, as shown in FIG. 3, a sufficient amount of the heat fusion layer 112 can be secured in the auxiliary fusion part 104.

  Therefore, it is possible to stably heat-bond the film 100 at the bottom portion where the film 110 is folded inward in the lateral seal portion 102 of the standing pouch 100 to form a quadruple. As a result, it is possible to form a good lateral seal portion 102 without peeling of the film 100 at the bottom of the standing pouch 100, and the standing pouch 100 can be stably and independently supported.

  In particular, by forming the auxiliary fusion part 104 in the region of the lateral seal part 102, the interval between the auxiliary fusion parts 104 becomes larger, so that the bottom surface 100c can be further widened when the standing pouch 100 is self-supporting. , More stable independence becomes possible. Further, as will be described in detail later, when the standing pouch 100 is manufactured, since the horizontal seal portion 102 and the auxiliary fusion portion 104 can be formed simultaneously by the seal mechanism for forming the horizontal seal portion 102, the auxiliary fusion portion 104 is formed. There is no need for a separate process or a sealing device.

  The base material layer removing unit 111a can be formed by any means as long as the base material layer 111 can be removed while leaving the heat-sealing layer 112, but most preferably, the base material layer removing part 111a is removed by a laser marker. The laser marker uses the fact that when a laser beam of a specific wavelength is irradiated onto the workpiece, the irradiated portion of the laser beam is locally heated, causing thermal changes such as melting and evaporation. Used to locally process the surface of Further, the processing depth can be arbitrarily changed by adjusting the output of laser light and the irradiation time.

  Therefore, if the laser marker is used, the base material layer 111 can be easily removed while leaving the heat fusion layer 112. Moreover, since the base material layer 111 is removed by melting, the removed part of the base material layer 111 is not separated from the film 110 as a foreign substance. Therefore, in the manufacturing process of the standing pouch 100, in addition to the process of removing the base material layer 111 in connection with the formation of the base material layer removal part 111a, an additional process such as a process of removing foreign matters is unnecessary. .

  The size and shape of the base material layer removing portion 111a (the auxiliary fusion portion 104 after being formed into a bag) can be determined depending on the size and shape of the standing pouch 100 as long as the necessary heat fusion strength at the folding portion 113 can be secured. And can be of any size and shape. Preferably, the auxiliary fusion part 104 is rectangular from the viewpoint of ease in forming the base material layer removal part 111a. When the auxiliary fusion part 104 is rectangular, the dimension of the auxiliary fusion part 104 is 3 mm or more in the folding depth direction at the folding part 113 and 2 mm or more in the direction perpendicular thereto. Preferably there is. If the size of the auxiliary fusion part 104 is smaller than this, the required heat fusion strength may not be obtained. As a matter of course, the upper limit of the length in the folding depth direction of the auxiliary fusion part 104 is equal to or less than the folding depth of the folding part 113. Moreover, it is preferable that the upper limit of the length of the auxiliary fusion part 104 in the direction perpendicular to the folding depth direction is equal to or less than the seal width of the lateral seal part 102. Of course, the length of the auxiliary fusion portion 104 in the direction perpendicular to the folding depth direction can be made larger than the seal width of the horizontal seal portion 102. In this case, the auxiliary fusion portion 104 is set to the horizontal seal portion. It is necessary to form by using a seal mechanism different from the seal mechanism for forming 102. Whatever the size and shape of the auxiliary fusion part 104, the size and shape of the base material layer removal part 111a can be easily changed by using a laser marker for forming the base material layer removal part 111a. As a result, the auxiliary fused portion 104 can be formed in any size and shape.

  Next, an example of a bag-filling and packaging machine that can be suitably used for manufacturing the above-described standing pouch 100 will be described.

  Referring to FIGS. 4 and 5, there are shown a side view and a front view of an example of a bag-filling-packaging machine that can be preferably used for manufacturing the standing pouch 100 shown in FIG. 4 and 5 show only main mechanisms related to the production of the standing pouch 100, and a frame and the like for supporting them are omitted.

  This bag making and packaging machine manufactures the standing pouch 100 in which the contents are enclosed by filling the contents while forming the bag 110 while feeding the long film 110 downward. First, the overall configuration of this bag making filling and packaging machine will be outlined.

  The bag making filling and packaging machine has an input pipe 11 for inputting contents. The input pipe 11 extends in the vertical direction, and its lower end serves as an outlet for the contents. As the contents, any of liquids, pastes, powders, solids, and the like can be applied.

  A film folding mechanism 20 is disposed on the top of the input pipe 11. The film folding mechanism 20 is configured so that the long film 110 supplied from a film supply roller (not shown) via the guide roller 12 faces the charging pipe 11 with the heat sealing layer 112 (see FIG. 2) facing inward. In a state in which the outer periphery of the film 110 is surrounded, it is folded inward along the longitudinal direction of the film 110 at the center in the width direction of the film 110 to form a portion that becomes the bottom surface 100c (see FIG. 1A) of the standing pouch 100. is there.

  Above the film folding mechanism 20, a laser marker 50 for forming the base material layer removing portion 111a (see FIG. 2) on the film 110 is disposed.

  Below the film folding mechanism 20, a film 110 that passes through the film folding mechanism 20 and is folded into a predetermined shape so as to surround the outer periphery of the input pipe 11 is heat-sealed along its longitudinal direction. A bottom seal mechanism 30 and a top seal mechanism 40 are disposed. The bottom seal mechanism 30 and the top seal mechanism 40 are disposed at positions facing each other with the charging pipe 11 therebetween. The bottom seal mechanism 30 forms the bottom seal portion 103 (see FIG. 1) of the standing pouch 100 by heat-sealing the portion of the film 110 folded by the folding mechanism 20 along the longitudinal direction of the film 110. The top seal portion 40 passes through the folding mechanism 20 and thermally seals the open end portion of the film surrounding the input pipe 11 along the longitudinal direction of the film 110, thereby allowing the top seal portion 101 of the standing pouch 100 (FIG. 1). Reference).

  Below the bottom seal mechanism 30 and the top seal mechanism 40, there are provided two pairs of feed rollers 13 that rotate while sandwiching both sides of the film 110 and feed the film 110 downward. Further below that, a pair of squeeze rollers 14 facing each other with the film 110 interposed therebetween is rotatable in synchronism with the rotation of the feed roller 13 and moves opposite to each other as indicated by an arrow A in FIG. It can be opened and closed freely. The squeeze roller 14 has a length sufficient to sandwich the film 110 over its entire width, and the squeeze roller 14 is closed and the film 110 is crushed at a position where the content is filled, so that the content in the film 110 can be obtained. Divide things. Therefore, the squeeze roller 14 is disposed below the outlet of the charging pipe 11. Further, the squeeze roller 14 can also feed the film 110 downward while blocking the movement of the contents below it by rotating with the film 110 sandwiched between them.

  The squeeze roller 14 is used particularly effectively when the standing pouch 100 is manufactured without mixing air inside when the contents are liquid or paste. Therefore, when there is no problem because air is mixed into the standing pouch 100, or when the content is powder or solid, the squeeze roller 14 is not necessary.

  Below the squeeze roller 1, the film 110 heat-sealed by the bottom seal mechanism 30 and the top seal mechanism 40 is heat-sealed over the entire width in the width direction, and the film 110 is cut at the heat-sealed portion. Accordingly, a lateral seal mechanism 60 that forms the lateral seal portion 102 (see FIG. 1) of the standing pouch 100 is disposed. The contents are sealed by heat-sealing the film 110 with the horizontal sealing mechanism 60.

  Next, the film folding mechanism 20, the bottom sealing mechanism 30, the top sealing mechanism 40, the laser marker 50, and the lateral sealing mechanism 60 described above will be described in detail.

(1) Film Folding Mechanism FIG. 6 shows a perspective view of the film folding mechanism 20.

  As shown in FIG. 6, a trapezoidal plate 21 is disposed below the guide roller 12. The trapezoidal plate 21 is disposed above the input pipe 11 (see FIG. 4) obliquely with respect to the vertical direction so that the long side of the two parallel sides is positioned on the upper side. In the vicinity of the lower end of the trapezoidal plate 21, a rectangular width defining plate 22 having a width substantially equal to the length of the lower side of the trapezoidal plate 21 is disposed so as to extend further downward from the lower side of the trapezoidal plate 21. ing. On both sides of the width defining plate 22, two guide arms 23 supported in parallel so as to have a constant distance from each other are disposed opposite to each other.

  When the film 110 passing through the guide roller 12 is pulled downward by the driving of the feed roller 13 (see FIG. 1), the film 110 adheres to the upper surface of the trapezoidal plate 21 and the surface facing the outside of the width defining plate 22. Sent down. At this time, the portions of the film 110 that have passed through the two oblique sides of the trapezoidal plate 21 are pressed from the outside by the respective guide arms 23. In the process so far, as shown in FIG. 6A, the film 110 has the surface 110a formed by the width regulation plate 22 (see FIG. 6) at the center in the width direction of the film 110, and the film 110 has The two surfaces 110b extending at right angles to each other are bent so as to face each other in parallel. The two surfaces 110b facing each other are the front surface and the back surface of the standing pouch 100, and the surface 110a between the surfaces 110b is the bottom surface 100c of the standing pouch 100 (see FIG. 1A).

  Below the width defining plate 22, one pushing plate 24 and two holding plates 25 for folding the surface 110 a formed on the film 110 by the width defining plate 22 further inside are arranged. The pushing plate 24 is an inverted triangular member, and is disposed on the opposite side of the top sealing mechanism 40 with the charging pipe 11 interposed therebetween, and is inclined so as to push the film surface 110a shown in FIG. 6A from the outside of the film 110. Is fixed. The two holding plates 25 are arranged so as to support the two surfaces 110b of the film 110 from the inside of the film 110, and the bent portion between the surfaces 110a and 110b of the film 110 is not pushed by the pushing plate 24. To regulate. Thereby, as shown in FIG. 6B, the surface 110a of the film 110 that has passed through the pressing plate 24 and the pressing plate 25 is folded inward to form a folded portion 113.

  Each presser plate 25 is inclined so that the interval between the presser plates 25 becomes narrower toward the lower side in accordance with the inclination angle of the oblique side of the push-in plate 24. Thereby, the film 110 can be smoothly guided by the two pairs of rollers 26 arranged below the presser plate 25.

  The film 110 is folded into the shape shown in FIG. 6B by the film folding mechanism 20 as described above. At this time, the film 110 is placed so that the heat-sealing layer 112 (see FIG. 2) of the film 110 faces inward. It is supplied to the film folding mechanism 20.

(2) Bottom Seal Mechanism As shown in FIGS. 7A and 7B, the bottom seal mechanism 30 includes two cylinders 33 fixed to the frame 10a of the bag making and packaging machine with rods 33a facing each other, and each cylinder 33. Two bottom seal bars 31 supported by pressure members facing each other via support members 32 fixed to the rods 33a of the rods, and receivers supported by the frame 10a and disposed between the bottom seal bars 31, respectively. Plate 34.

  The receiving plate 34 is disposed at a position that enters the folding portion 113 (see FIG. 6B) formed in the film 110 by the bag making folding mechanism 20 described above from the outer surface side of the film 110. Each bottom seal bar 31 incorporates heating means (not shown) such as an electric heater. By heating each bottom seal bar 31 with these heating means and simultaneously driving each cylinder 33 to advance each bottom seal bar 31, both sides of the folding portion 113 are heat-sealed simultaneously.

  As shown in FIG. 8, the pressure surface of each bottom seal bar 31 has a convex portion 31 a that protrudes from the surroundings in the hatched region, and the pressure surface of the bottom seal bar 31 is pressed against the film 110. In actuality, the convex portion 31a is pressurized. The shape of the bottom seal portion 103 (see FIG. 1) of the standing pouch 100 is determined by the shape of the convex portion 31a. Normally, the shape of the bottom seal portion 103 is such that the bottom bottom portion 100c (see FIG. 1A) of the standing pouch 100 becomes a ship bottom shape, but is not particularly limited. Further, the length L of the convex portion 31a in the feeding direction of the film 110 is larger than the feeding pitch P of the film 110 in one cycle operation of the packaging machine, and the film 110 is spread over the entire longitudinal direction of the film 110. It is configured to ensure heat fusion. The feed pitch P of the film 110 corresponds to the width of the standing pouch 100.

(3) Top Seal Mechanism As shown in FIGS. 9A and 9B, the top seal mechanism 40 includes two cylinders 43 fixed to the frame 10b of the bag making filling and packaging machine with the rods 43a facing each other, and each cylinder 43. There are two ceiling seal bars 41 that are instructed with the pressing surfaces facing each other via support members 42 fixed to the rods 43a respectively. The open end of the film 110 folded by the bag making and folding mechanism 20 described above passes between the top seal bars 41.

  Each top seal bar 41 has a built-in heating means (not shown) such as an electric heater. While heating the top seal bar 41 with these heating means, each cylinder 43 is simultaneously driven to advance each top seal bar 41, so that the solution end of the film 110 is thermally fused along the longitudinal direction of the film 110. The film 110 is cylindrical.

  As shown in FIG. 10, the pressure surface of each top seal bar 41 has a convex portion 41 a that protrudes from the surroundings in the hatched region, and the pressure surface of the top seal bar 41 is pressed against the film 110. In actuality, the convex portion 41a is pressurized. The shape of the top seal portion 101 of the standing pouch 100 is determined by the shape of the convex portion 41a. Further, like the convex portion 31a of the bottom seal bar 31 described above, the length of the convex portion 41a in the feeding direction of the film 110 is larger than the feeding pitch of the film 110 in one cycle operation of this packaging machine. The film 110 can be reliably heat-sealed over the entire longitudinal direction of the film 110.

(4) Laser Marker Referring to FIG. 6, the laser marker 50 has a laser beam irradiation part facing the base material layer 111 (see FIG. 2) of the film 110 on the upstream side of the folding mechanism 20 in the feeding direction of the film 110. Are arranged. The laser marker 50 is synchronized with the feeding of the film 110 and is opposed to each other in the folding portion 113 formed by the film folding mechanism 20, and in other words, the position where the horizontal sealing portion 103 is formed by the horizontal sealing mechanism 60. The base material layer removing portion 111a is formed at a position where the horizontal sealing mechanism 60 is pressurized.

The laser marker 50 is not particularly limited as long as it can melt and remove the base material layer 111 while leaving the heat-sealing layer 112 in a predetermined region of the film 110. By appropriately setting the irradiation condition of the laser light from the laser marker 50 according to the film 110, the base material layer 111 can be effectively removed. For example, a CO ₂ laser marker (manufactured by Keyence Corporation, model number: ML-Z9510) is used as the laser marker 50, and a base material layer 111 (thickness: 15 μm) made of nylon and a thermal fusion layer made of polyethylene are used as the film 110. When a laminated film with a thickness of 112 (thickness: 70 μm) is used, the average output of the laser beam is about 24 W, and the laser beam is scanned at a speed of 4000 mm / sec to almost remove the thermal fusion layer 112. Thus, the base material layer 111 can be removed.

(5) Horizontal Seal Mechanism As shown in FIG. 5, the horizontal seal mechanism 60 is disposed so as to face the film 110, and is synchronized with the feeding operation of the film 110 by a driving source (illustrated) such as a cylinder or a motor. A horizontal seal bar 61 and a horizontal seal bar receiver 62 are provided so as to be movable in opposition to each other. The horizontal seal bar 61 incorporates heating means such as an electric heater. The horizontal seal bar 61 and the horizontal seal bar receiver 62 have a width W (see FIG. 4) that is larger than the width of the film 110 that has passed through the squeeze roller 14, and the horizontal seal bar 61 and the horizontal seal bar receiver 62 are heated by the horizontal seal bar. When the film 110 is sandwiched between the horizontal seal bar 61 and the horizontal seal bar receiver 762 and pressed and heated while the 61 is heated, the film 110 can be heat-sealed over the entire width.

  Grooves extending in the width direction are formed on the mutually opposing surfaces of the horizontal seal bar 61 and the horizontal seal bar receiver 62. A cutter 63 is disposed in the groove of the horizontal seal bar receiver 62. The cutter 63 is supported such that the cutting edge faces the side of the horizontal seal bar 61, and is provided so as to move forward and backward from the groove by a drive source (not shown). The groove of the horizontal seal bar 61 is configured to receive the cutting edge of the cutter 63 protruding from the groove of the horizontal seal bar receiver 62.

  Next, the manufacturing process of the standing pouch 100 by the above-described bag making filling and packaging machine will be described.

  The film 110 wound on the roll is intermittently fed out of the roll at a constant feed pitch by driving the feed roller 13. In the film 110 fed out from the roll, the base material layer removing portion 111 a is formed by the laser marker 50. The film 110 on which the base material layer removing portion 111a has been formed is then sent to the folding mechanism 20, where the heat fusion layer 112 is set as the inner side, as shown in FIG. 6B, in the width direction of the film 110. Folded 113 is formed along the longitudinal direction of the film 110 by being folded so that the cross section is W-shaped.

  The film 110 on which the folded portion 113 is formed is sent downward, and the bottom seal mechanism 30 heat-fuses the film 110 on both sides of the folded portion 113 to form the bottom seal portion 103. On the other hand, the open end portion in the width direction of the film 110 is heat-sealed along the longitudinal direction of the film 110 by the top seal mechanism 40 to form the top seal portion 101, and the film 110 has a cylindrical shape.

  After the bottom seal portion 102 and the top seal portion 101 are formed, the film 110 is further sent downward, and is heat-sealed over the entire width direction by the lateral seal mechanism 60, whereby the lower end portion of the film 110 is sealed. At this time, the cutter 63 is advanced in a state where the film 110 is pressed by the horizontal seal bar 61 and the horizontal seal bar receiver 62, and the heat-sealed region is positioned in the width direction of the film 110 at a substantially intermediate position in the film 110 feeding direction. Cut along. Thereafter, the horizontal seal bar 61 and the horizontal seal bar receiver 62 are opened, and the portion of the film 110 cut off by cutting is dropped. The part heat-sealed in this step becomes one of the two horizontal seal portions 102 of the standing pouch 100.

  During the heat-sealing operation of the film 110 by the horizontal sealing mechanism 60, the squeeze roller 14 is closed. During this time, the contents are fed into the film 110 formed in a cylindrical shape through the feeding pipe 11. Therefore, as shown in FIG. 11 a, the charged contents 200 are held above the closed squeeze roller 14.

  The horizontal seal portion 102 of the standing pouch 100 is formed by heat-sealing the film 110 by the horizontal seal mechanism 60. At the same time, the film 110 is formed in a quadruple portion that is folded inward. Also in the base material layer removal part 111a (refer FIG. 2), the film 110 is heat-sealed also in the part of the heat sealing | fusion layer 112 (refer FIG. 2) exposed via the base material layer removal part 111a. Thereby, the auxiliary fusion part 104 (refer FIG. 1 and FIG. 3) is formed in the film 110. FIG. At this time, in the portion where the film 110 is folded inward, the difference in the thickness of the film 110 between the region where the base material layer removing portion 111a is formed and the other region forms a hole by punching as in the prior art. Small compared to the case. Therefore, it is possible to stably pressurize and heat the quadruple portion of the film 110 that is folded inward, and as a result, the auxiliary melt that hardly causes separation between the overlapping films 110. A landing portion 104 can be formed.

  Here, the case where the auxiliary seal portion 104 is formed simultaneously with the formation of the horizontal seal portion 102 by the horizontal seal mechanism 60 has been described. However, the auxiliary seal portion is formed simultaneously with the formation of the bottom seal portion 103 by the bottom seal mechanism 30. 104 can also be formed. In that case, what is necessary is just to set it as the structure except the receiving plate 34 arrange | positioned between a pair of bottom seal bars 31 in the bottom seal mechanism 30 shown to FIG. 7A and FIG. 7B. As a result, when the film 110 is sandwiched between the bottom seal bars 31, the base layers 111 are in direct contact with each other in the folded portion 113, so that the folded portion 113 is heat-sealed at the portion where the base layer removing portion 111a is formed.

  When the lower end of the film 110 is sealed as described above, the squeeze roller 14 is opened as shown in FIG. 11b. Then, the content 200 held above the squeeze roller 14 falls into the cylindrical film 110 from between the squeeze rollers 14 and is held on the horizontal seal portion 102 formed in the previous step. The

  Thereafter, the film 110 is fed by a feed pitch P corresponding to the width of the standing pouch 100, and when the contents 200 are put into the film 110 to a position higher than the position of the squeeze roller 14, as shown in FIG. Close the squeeze roller 14. As a result, the content 200 is divided by the squeeze roller 14.

  After the content 200 is divided by the squeeze roller 14, as shown in FIG. 11d, the squeeze roller 14 is rotated in synchronization with the feed roller 13 to feed the film 110 downward. As a result, the content 200 above the squeeze roller 14 is held above the squeeze roller 14, and the film 110 is sent in a state of being crushed by the squeeze roller 14 below the squeeze roller 14. An unfilled flat portion 120 is formed.

  When the lower end portion of the flat portion 120 reaches the position of the horizontal seal mechanism 60, the horizontal seal mechanism 60 is driven to heat-bond the film 110 with the flat portion 120 over the entire width direction of the film 110 as shown in FIG. At the same time, the film 110 is cut at the heat-sealed portion by the cutter 63 to form the lateral seal portion 102. Thereafter, the horizontal seal bar 61 and the horizontal seal bar receiver 62 are opened, and the portion of the film 110 filled with the contents 200 below the horizontal seal mechanism 60 is dropped. Thereby, the standing pouch 100 shown in FIG. 1 is manufactured.

  In the above description using FIGS. 11 a to 11 e, the operation of the squeeze roller 14 and the lateral seal mechanism 60 has been mainly described. However, every time the film 110 is fed by the pitch P, the bottom seal portion 103 is formed by the bottom seal mechanism 30. And the top seal portion 101 is formed by the top seal portion 40. By repeating the above series of operations, the standing pouch 100 is continuously manufactured.

  As described above, in the manufacturing process of the standing pouch 100, the portion of the film 110 where the lateral seal portion 102 is formed by the lateral seal mechanism 60 is folded into the inside and the base layer 111 is opposed to the portion facing each other. The material layer removal part 111a is formed. As a result, the portion where the film 110 is quadruple in the lateral seal portion 102 can be easily and stably thermally fused. As a result, it is possible to effectively prevent the film 110 from peeling off at the bottom of the lateral seal portion 102.

  In addition, since the laser marker 50 is used to form the base material layer removal portion 111a, the base material layer removal portion 111a can be formed very easily. Further, since the formation of the base material layer removal portion 111a by the laser marker 50 is performed by locally melting and removing the base material layer 111, unlike the conventional case of partially removing the film by punching, No dust is generated due to partial removal of the film 110. Therefore, a part of the removed film 110 does not enter the standing pouch 100 as a foreign substance, and it is not necessary to add an additional device for removing dust.

  As described above, the present invention has been described by taking typical embodiments as examples. However, the present invention is not limited to the above-described embodiments, and various modifications can be made.

  For example, the film folding mechanism 20, the bottom sealing mechanism 30, the top sealing mechanism 40, and the lateral sealing mechanism 60 are various mechanisms used in ordinary packaging machines depending on the size and shape of the standing pouch 100 to be manufactured. You may use it combining suitably. In the embodiment described above for the type of packaging machine, a series of operations including forming a film by heat fusion of the film, filling the contents, and sealing while feeding one long film downward Although the present invention shows a bag-filling and packaging machine that is continuously performed in the present invention, the present invention provides a plurality of films as long as the apparatus includes a mechanism for heat-sealing portions where the base material layers face each other by folding the film. The present invention can be applied to various types of apparatuses such as an apparatus that manufactures a standing pouch by combining by heat fusion, or an apparatus that manufactures a standing pouch while feeding a film in the horizontal direction.

  In addition, the standing pouch according to the present invention is not particularly limited in size, shape, structure, and the like as long as the portions where the base material layers face each other by folding the film are configured to be in close contact with each other at the lateral seal portion. Instead, for example, as shown in FIG. 12, a standing pouch 100 in which a spout 105 is attached to the top seal portion 101 to facilitate opening and dispensing may be used.

  When the standing pouch 100 with the spout 105 is manufactured, for example, in the apparatus shown in FIGS. 4 and 5, any spout 105 is supplied to a predetermined position at the open end of the film 110 above the top seal mechanism 40. A spout supply mechanism (not shown) is arranged, and the spout supply mechanism temporarily fixes the spout 105 to the open end of the film 110, and then heat-seals the open end of the film 110 to which the spout 105 is temporarily fixed. The film 110 is heat-sealed by an appropriate ceiling sealing mechanism 40 suitable for the above, and the top sealing portion 101 and the main fixing of the spout 105 are simultaneously performed. Other processes and mechanisms may be the same as described above.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to the production of the standing pouch 100 has been described as an example. However, the present invention can be applied not only to the standing pouch 100 but also to other types of packaging bags as long as the packaging bag has a folding portion and a heat seal portion is formed in a predetermined region including the folding portion. it can.

  An example of this type of packaging bag is a gusset bag. As shown in FIG. 13, the inside of the gusset bag 200 is hermetically sealed by a vertical seal portion 201 and upper and lower horizontal seal portions 202. A fold portion 204 called a gusset is formed on both sides in the width direction of the gusset bag 200, and the lateral seal portion 202 is formed across the fold portion 204.

  As described above, the film used to manufacture the gusset bag 200 is a film in which a heat-sealing layer and at least one base material layer are laminated and face each other with the heat-sealing layer inside. The vertical seal portion 201 and the horizontal seal portion 202 are formed by heat-sealing the heat-sealing layers. By setting the heat-fusible layer to the inner side, the film is folded to the heat-fusing layer side at the folded portion 204, and the base material layers of the folded portion 204 face each other. Therefore, when the horizontal seal portion 202 is formed in this state, as shown in FIG. 13A, the portion where the base material layers face each other in the folded portion 204 is not thermally fused in the folded portion 204. Opens and looks bad.

  Therefore, in the gusset bag 200 shown in FIG. 13, the folding portion 204 has an auxiliary fusion portion 203 in a region where the lateral seal portion 202 is formed. Is in close contact. As in the case of the standing pouch described above, the auxiliary fusion part 203 is formed in advance with a base material layer removal part in which the base material layer is removed by leaving the heat fusion layer at positions facing each other in the folding part 204. It can be formed by heat-sealing the base material layer removal portions.

  The gusset bag 200 of this embodiment can be manufactured as follows, for example. First, prepare a long film, face both ends of the film in the width direction so that the heat-sealing layer is inside, and heat-bond both ends of the facing film in the width direction along the length of the film Thus, the vertical seal portion 201 is formed. Thereby, a film is made into a cylinder shape. For the formation of the vertical seal portion 201, any seal mechanism generally used for forming the vertical seal portion 201 in the manufacture of the gusset bag can be used as the first seal mechanism. In order to satisfactorily form the vertical seal portion 201, it is preferable that the film is heat-sealed by a seal mechanism in a state where the film is formed into a substantially cylindrical shape using an appropriate former.

  While the film is formed into a cylindrical shape, the base material layer removing portion is formed on the film by removing the base material layer while leaving the heat-sealing layer at the portion where the auxiliary fusion portion 203 of the film is formed. In the formation of the base material layer removal portion, a laser marker can be preferably used as described above.

  After forming the base material layer removing portion, the outer peripheral surface of the cylindrical film is folded toward the heat-sealing layer side in the longitudinal direction of the film at a position facing each other and not overlapping the vertical seal portion 201. Two folds 204 are formed. For the formation of the folding part 204, any folding mechanism generally used in the manufacture of gusset bags can be used. The folded portion 204 may be formed at the same time as the vertical seal portion 201 or before the vertical seal portion 201 is formed as long as it is after the base material layer removing portion is formed.

  On the other hand, the contents are put into the cylindrical film, and the contents-filled film is heat-sealed over its entire width to form the transverse seal portion 202, thereby sealing the contents. For the formation of the lateral seal portion 202, any seal mechanism generally used for forming the lateral seal portion 202 in the manufacture of the gusset bag can be used as the second seal mechanism. This type of sealing mechanism is configured to heat and fuse the film by pressing and heating the film across its entire width. By pressing and heating the film over its entire width, even in the base material layer removal portion formed in the folding portion 204, the exposed heat-sealing layers are heat-sealed to form the auxiliary fusion portion 203, As a result, the horizontal seal portion 202 and the auxiliary fusion portion 203 are formed in a common process.

  The gusset bag 200 can be continuously manufactured by repeatedly performing the series of steps described above while feeding the film in the longitudinal direction. In this case, it is preferable to divide the gusset bag 200 individually by cutting the film in the width direction at the lateral seal portion 202. The cutting mechanism for individually separating the gusset bags 200 may be incorporated in the sealing mechanism for forming the lateral seal portion 202, or may be provided separately from the sealing mechanism.

  According to this embodiment, by providing the auxiliary fusion part 203 as described above, it is possible to prevent the folding part 204 from being opened in the lateral seal part 202 and to provide the gusset bag 200 having a good appearance. Further, as in the case of the standing pouch, the film can be stably heat-sealed at the auxiliary fusion part 203. Moreover, by forming the base material layer removal portion with a laser marker, the base material layer removal portion can be formed without generating excessive dust.

1 is a perspective view of a standing pouch according to an embodiment of the present invention. It is a longitudinal cross-sectional view in the width direction center part of the standing pouch shown in FIG. FIG. 2 is a cross-sectional view of the standing pouch shown in FIG. 1 at a portion where an auxiliary fusion part is formed before heat fusion of the film. It is sectional drawing of the auxiliary | assistant melt | fusion part vicinity of the standing pouch shown in FIG. It is a side view of an example of the bag making filling packaging machine used suitably for manufacture of the standing pouch shown in FIG. It is a front view of the bag making filling packaging machine shown in FIG. FIG. 6 is a perspective view of the film folding mechanism shown in FIGS. 4 and 5. It is a transverse cross section of the film which passed the width regulation board of a film folding mechanism. It is a cross-sectional view of the film which passed the film folding mechanism. FIG. 6 is a top view of the bottom seal mechanism shown in FIGS. 4 and 5. FIG. 6 is a side view of the bottom seal mechanism shown in FIGS. 4 and 5 as viewed from the input pipe side. It is a figure of the pressurization surface of the bottom seal bar shown to FIG. 7B. FIG. 6 is a top view of the top seal mechanism shown in FIGS. 4 and 5. FIG. 6 is a side view of the top seal mechanism shown in FIGS. 4 and 5 as viewed from the input pipe side. It is a figure of the pressurization surface of the top seal bar shown to FIG. 9B. It is a figure explaining the manufacturing procedure of the standing pouch by the bag making filling packaging machine shown in FIG. It is a figure explaining the manufacturing procedure of the standing pouch by the bag making filling packaging machine shown in FIG. It is a figure explaining the manufacturing procedure of the standing pouch by the bag making filling packaging machine shown in FIG. It is a figure explaining the manufacturing procedure of the standing pouch by the bag making filling packaging machine shown in FIG. It is a figure explaining the manufacturing procedure of the standing pouch by the bag making filling packaging machine shown in FIG. It is a perspective view of the other example of the standing pouch to which this invention is applied. It is a perspective view of the gusset bag by the other form of this invention. It is a perspective view in the vicinity of a horizontal seal part of a gusset bag which does not have an auxiliary fusion part by the present invention. It is sectional drawing before the heat sealing | fusion in the part in which the hole was formed in the film of the conventional standing pouch. It is sectional drawing after the heat sealing | fusion of the film part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Input pipe 13 Feeding roller 14 Shigaki roller 20 Film folding mechanism 30 Bottom seal mechanism 40 Top seal mechanism 50 Laser marker 60 Horizontal seal mechanism 100 Standing pouch 101 Top seal part 102 Horizontal seal part 103 Bottom seal part 104 Auxiliary fusion part 110 Film 111 Base material layer 111a Base material layer removal part 112 Thermal fusion layer 113 Folding part

Claims (10)

A packaging bag made using a film in which a heat-sealing layer and at least one base material layer are laminated, the heat-sealing layer being inside,
At least one folding part formed by partially folding the film to the heat-sealing layer side;
In order to hermetically seal the inside, a heat seal part formed by heat-sealing the heat-seal layers facing each other at a predetermined part including a part of the folded part,
Auxiliary fusion parts formed by partially heat-sealing portions of the folds facing each other,
Have
The auxiliary fusion part thermally fuses the portions of the film that have been formed in advance on the film at positions facing each other of the folding part and from which the base material layer has been removed leaving the thermal fusion layer. The packaging bag characterized by being formed.   The packaging bag is a standing pouch, and the folding portion constitutes a bottom portion that enables the standing pouch to be self-supported by folding the film inward over the entire width direction of the standing pouch, and expanding the auxiliary pouch. The packaging bag according to claim 1, wherein the wearing portions are formed on both side portions of the standing pouch in the width direction.   The heat seal part includes a top seal part formed on an upper edge of the standing pouch and a horizontal seal part formed on both side edges of the standing pouch, and the auxiliary fusion part is the horizontal seal part. The packaging bag of Claim 2 currently formed in the area | region of this. A method for manufacturing a packaging bag, comprising:
Preparing a long film in which a heat-sealing layer and at least one base material layer are laminated;
Both ends of the film in the width direction face each other so that the heat-sealing layer is on the inside, and both ends of the film in the width direction facing each other are heat-sealed along the longitudinal direction of the film to form the cylinder And a process of
Folding a part of the film along the longitudinal direction of the film toward the heat-fusible layer, and forming at least one fold in the film;
A step of introducing the contents into the inside of the tubular film;
Sealing the contents by thermally fusing the film loaded with the contents over its entire width;
Prior to the step of forming the folded portion, the thermal fusion bonding is performed at a position opposite to each other in the portions of the film that are folded in the step of forming the folded portion and thermally fused in the step of sealing the contents. Forming a base material layer removing portion from which the base material layer is removed leaving a layer;
After the step of forming the folded portion, a method of manufacturing a packaging bag comprising: a step of thermally fusing the film at a position where the base material layer removal portion is formed to form an auxiliary fusion portion.   The packaging bag is a standing pouch, and the step of forming the film into a cylindrical shape includes forming a top seal portion of the standing pouch by heat-sealing both end portions in the width direction of the film in the longitudinal direction of the film. And sealing the contents includes heat-sealing the film over the entire width and cutting the film at the heat-sealed portion to form a lateral seal portion of the standing pouch. The manufacturing method of the packaging bag of Claim 4.   The method for producing a standing pouch according to claim 4 or 5, wherein the step of forming the base material layer removing portion includes melting and removing the base material layer by locally irradiating a laser beam.   The manufacturing process of the standing pouch according to any one of claims 4 to 6, wherein the step of forming the auxiliary fusion part is a step common to heat fusion over the entire width of the film in the step of sealing the contents. Method. A bag-making filling and packaging machine that forms a bag by heat fusion and fills the contents while feeding a long film in which a heat fusion layer and at least one base material layer are laminated downward,
An input pipe arranged in a vertical direction to input the contents;
At least one film folding mechanism that folds the film inward along the longitudinal direction of the film in a state in which the outer periphery of the input pipe is surrounded with the heat sealing layer as the inner side, and forms a folded portion in the film When,
A first sealing mechanism for heat-sealing the open end of the film surrounding the outer periphery of the input pipe along the longitudinal direction of the film;
A second sealing mechanism that is disposed below the charging pipe and heat-sealed over the entire width of the film heat-sealed by the first sealing mechanism;
The portions of the film that are disposed upstream of the film folding mechanism in the film feeding direction, are folded by the film folding mechanism, and are heat-sealed by the second seal mechanism are positioned at positions opposite to each other. A base material layer removing device for forming a base material layer removing portion from which the base material layer has been removed leaving a fusion layer;
A bag making filling and packaging machine.   The film folding mechanism has a pushing plate disposed on the opposite side of the first seal mechanism with the dosing pipe interposed therebetween so as to form one folding section at the center in the width direction of the film. The bag making filling and packaging machine according to claim 8.   The bag making and filling machine according to claim 8 or 9, wherein the base material layer removing device is a laser marker that melts and removes the base material layer by laser light irradiation.

Images