JP6265486B2 - Manufacturing apparatus for film packaging bag containing contents and manufacturing method thereof - Google Patents

Description

  The present invention relates to an apparatus and a method for manufacturing a film packaging bag containing contents by forming a gusset bag from a belt-like film and filling the gusset bag with the contents and sealing the contents. In particular, the present invention relates to a film packaging bag (that is, a product) containing the contents, in which a heat seal portion (so-called hem seal) is formed at each corner of the side surface of the bag so that it can stand on its own.

As an example of an apparatus for producing a film packaging bag containing contents, a vertical type that feeds the bag-like film in the vertical direction while forming the film into a bag shape, and puts the contents into the bag-like film for sealing. Bag making and filling machines are known. The vertical bag making and filling machine is suitable for filling and packaging foods because it can produce bag-packed products with a sealed inside, and it can also be used to fill not only solids but also liquid or pasty beverages. Widely used.
Furthermore, regarding the form of the film packaging bag, a gusset bag is known in which both the left and right sides of the bag are folded inward. Such a gusset bag has a columnar shape with the folds (gussets) on both the left and right sides expanding when it is filled with the contents, but it is flat when there is no content, thus reducing waste. It is a useful bag for filling.

Such a gusset bag can be manufactured by providing the above-described vertical bag making and filling machine with a folding guide device for folding the left and right sides of the packaging bag inward.
Specifically, the left and right sides of the cylindrical film are folded inward in a V shape by a folding guide device. After that, when the contents are filled in a cylindrical film and sealed, a gusset packaging bag 100 in which gussets 100a (side portions with expanded V-shaped folded portions) are formed at both ends as shown in FIG. Is done.
Patent document 1 and patent document 2 disclose a bag making and filling machine provided with means for forming a folded portion in a cylindrical film as described above.

In addition, regarding the shape of the film packaging bag, it may be desired that the bag can be placed in a standing state. Therefore, a heat seal portion (hem seal) may be formed at the corner portion by thermally welding films that intersect at the corner portion of the bag formed into a prism.
Patent Document 3 discloses a vertical bag making and filling machine provided with means for forming a hem seal at the corner of a prismatic bag. FIG. 14 is a schematic perspective view showing an example of such a vertical bag making and filling machine.

In the vertical bag making and filling machine 200 shown in FIG. 14, the belt-like film 201 is bent downward by the bag making guide 202 so as to wrap around the outer surface of the square tube-shaped bag making and filling tube 203. To be guided to. A pair of feed belts 204 a and 204 b disposed outside the bag making and filling cylinder 203 feeds the belt-like film 201 downward with a frictional force while being sandwiched between the bag making and filling cylinder 203. A square cylindrical film 206 is formed by heat-sealing both side edges (joints) of the strip-shaped film 201 wound around the bag-filling cylinder 203 by the center sealer 205.
Hem seals 208a to 208d are formed on the square tube-shaped film 206 by hem sealers 207a to 207d disposed outside the four corners of the bag making and filling tube 203 (the hem sealer 207c and the hem seal 208c are not visible in FIG. 14). ). The side surfaces of the prismatic bag are reinforced by the hem seals 208a to 208d, the shape of the bag is maintained, and it becomes possible to stand on its own.
Then, the end seal portion 210 is formed by sandwiching the rectangular tube-shaped film 206 by the end sealers 209a and 209b arranged to face each other. The contents are put into the square tube-shaped film 206 with the end seal portion 210 as a bottom portion through the pipe 211 through the bag making and filling tube 203. Thereafter, the rectangular tube-shaped film 206 is fed downward at a constant pitch, and end sealing is performed again, whereby the packaging bag 212 with hem seal in which the contents are enclosed is manufactured.

WO2008 / 056408 pamphlet JP 2006-75987 A JP 2011-136714 A

In the current market, gable-top paper containers are used as packaging bodies for milk packs and liquor packs containing 1 liter, but this involves the trouble of crushing the containers when reducing the volume of waste. Thought that a film gusset bag could be applied to such a container. In addition, in the case of a prismatic container having a square cross section such as a milk pack, there is also an advantage that packing at the time of transportation and display on a merchandise display shelf can be performed efficiently.
Therefore, the inventor is a prismatic gusset bag having a square cross-section with the contents placed therein, and a method for producing a self-supporting film packaging bag containing contents, and a vertical bag making method for carrying out the same The development of a filling machine was studied.
In order to obtain a film packaging bag with contents in such a form, it is shown in Patent Document 1 or 2 below the bag making and filling cylinder of the bag making and filling machine shown in Patent Document 3 and above the end sealer. An attempt was made to arrange a means for forming a folded portion in such a square tubular film.

However, it has been found that with this device, the shape of the product cannot be made into the shape of a prism having a square cross section. It has the following actual situation.
The four hem sealers shown in FIG. 14 form a hem seal by picking and thermally welding film portions located at respective corners of a rectangular tube-shaped bag-filling cylinder extending in the vertical direction. From the viewpoint of product productivity, the four hem sealers are driven simultaneously, and each film portion is picked simultaneously. The operation of this hem sealer is performed on a rectangular tube-shaped film in which the contents are charged. Due to these actual conditions, the film portions corresponding to the respective hem sealers cannot be accurately picked with the same width, and as a result, the width of the four side surfaces of the manufactured product is different.
Furthermore, when a rectangular tube-shaped film having hem seals formed at the four corners is folded into a V-shape inside by folding plates on the left and right sides of the film, the presence of the bag-filling cylinder that defines the outer shape of the bag The left and right sides of the tubular film cannot be folded to the center of the inside. As a result, the shape of the manufactured product is not a prism having a square cross section like a normal milk pack, but only a prism having a rectangular cross section. In addition, since the left and right sides of the rectangular tube-shaped film cannot be folded to the center of the inside, the number of films to be welded (the number of overlapping) when performing end sealing differs in the lateral direction of the bag. The seal strength of the part is not uniform in the lateral direction of the bag.
Moreover, in the prior art apparatuses shown in Patent Documents 1 to 3, there is a problem that a joint portion by a center seal remains on the side surface of the manufactured product. When displaying a product, the joint is usually placed behind the product, which limits the layout of the printed image drawn on the side of the product.

  Therefore, an object of the present invention is to solve at least one of the problems described above. As an example of the object, a manufacturing method and a manufacturing apparatus capable of manufacturing a film packaging bag containing contents, which is a prismatic gusset bag having a square cross section in a state in which the contents are put in, in a state where the contents are put in, and can be self-supporting. It is to provide. A further object is to provide a novel manufacturing method and manufacturing apparatus capable of manufacturing a film packaging bag containing such contents in a form having high sealing reliability and a good appearance.

  One aspect of the present invention is to form a gusset bag-shaped bag portion from a band-shaped film, and form a hem seal at a corner portion on the side surface of the gusset bag-shaped bag portion, and the contents in the gusset bag-shaped bag portion. It is related with the method of manufacturing the film packaging bag containing a content by filling.

This manufacturing method includes the following steps.
As a 1st process, the part of the strip | belt-shaped film corresponded to the folding part of the right and left both sides of a bag part of a gusset bag shape is folded.
As a second step, heat sealing is performed on the folded portion of the belt-like film in the lateral direction of the portion to form a first-stage horizontal seal portion.
As a third step, a belt-like shape in which a first-stage horizontal seal portion is formed so as to form a tubular film that surrounds a pipe filling the contents and is folded in a V shape on the left and right sides. The film is bent, and both edges in the lateral direction of the belt-like film are combined.
As a fourth step, the first-stage horizontal seal portion is formed on the cylindrical film so as to match the position and shape of the first-stage horizontal seal portion except for the passage portion of the pipe. A combined horizontal seal portion is formed by combining the horizontal seal portions of the step and the second step, and the tubular film is partitioned into gusset bag-shaped bag portions.
As a fifth step, the non-adhesive part is sealed by heat-sealing the non-adhesive part, which is the passage part of the pipe, of the synthetic lateral seal part corresponding to the lower end of the bag part of the gusset bag shape partitioned into a cylindrical film. Seal the gap.
As a sixth step, the contents are filled from the outlet end of the pipe into a gusset bag-like bag portion partitioned into a cylindrical film.

Another aspect of the present invention relates to an apparatus for producing a film packaging bag containing the contents as described above. This device has a gusset forming portion, a first lateral seal mechanism, a forming mechanism, a pipe, a hem seal mechanism, a second lateral seal mechanism, and a sealing seal mechanism.
The gusset forming portion folds the band-shaped film portions corresponding to the folded portions on the left and right sides of the gusset bag-shaped bag portion.
The first lateral seal mechanism includes a seal bar that is disposed so as to face a portion where a band-shaped film is folded in the gusset forming portion. In this mechanism, heat sealing is performed on the folded portion in the lateral direction with the seal bar to form a first-stage lateral seal portion.
The forming mechanism folds the belt-like film on which the first horizontal seal portion is formed so as to form a cylindrical film in which the left and right sides are folded inwardly in the V shape, and the lateral direction of the belt-like film Align both edges of.
The pipe extends along the length direction of the cylindrical film by entering the inside of the cylindrical film from the opening between both lateral edges of the strip-shaped film combined by the forming mechanism, Fill the contents.
The second lateral seal mechanism includes a seal bar disposed so as to face the cylindrical film. This mechanism is formed by forming the second-stage horizontal seal portion on the cylindrical film with the seal bar so as to match the position and shape of the first-stage horizontal seal portion except for the passage portion of the pipe. A synthetic horizontal seal portion is formed by combining the first and second horizontal seal portions, and the cylindrical film is partitioned into gusset bag-shaped bag portions.
The sealing mechanism is installed before the exit end of the pipe. This mechanism heat-seals the non-adhesive portion, which is the passage portion of the pipe, of each synthetic lateral seal portion corresponding to the lower end and the upper end of the gusset bag-like bag portion to seal the gap between the non-adhesive portions.

  According to each aspect of the invention described above, first, in the belt-like film, the portions corresponding to the folded portions on both the left and right sides of the gusset bag-shaped bag portion are folded, and a lateral seal is performed on the folded portion, so that the first stage The horizontal seal part is formed. After that, the belt-like film on which the first-stage horizontal seal portion is formed is folded so as to surround the pipe filling the contents, and both the left and right sides of the belt-like film are aligned with each other. Is formed into a cylindrical film folded in a V shape inside.

  In contrast to the method of the present invention, the conventional method is a method in which a cylindrical film is formed from a belt-like film so as to surround a pipe, and then the left and right sides of the cylindrical film are folded inward into a V shape. Therefore, there is a problem that the amount of folding on both the left and right sides of the bag portion of the gusset bag shape is limited by the pipe. However, according to the above-described method of the present invention, since the gusset bag-like bag portion is folded from the beginning, the amount of folding that folds the left and right sides of the gusset bag-like bag portion inward is determined by the pipe filling the contents. I can't prevent anything. Therefore, the amount of folding can be set so that the widths of the left and right side surfaces (gussets) in the gusset bag-like bag portion when the contents are filled are substantially equal to the widths of the front surface and the back surface. That is, it is possible to manufacture a prismatic gusseted bag having a square cross section with the contents put therein.

In the case of the prior art, a horizontal seal portion is formed on a film formed into a cylindrical shape, and the film is filled with contents in the bottom seal portion of the horizontal seal portion. A method of forming a film packaging bag filled with contents into a film by forming a seal portion is employed. This method is a method in which contents are put into a tubular film suspended from one horizontal seal portion as a bottom portion. Therefore, there is a problem that a wavy portion is formed on the film surface as the weight of the content required for the product is increased, and wrinkles are easily formed during the formation of the lateral seal portion.
In contrast to such conventional technology, the present invention forms a composite lateral seal portion at a predetermined interval on the cylindrical film by the first lateral seal mechanism and the second lateral seal mechanism, thereby Prior to filling, a bag-like portion (a portion that will later become a film packaging bag) is partitioned into a cylindrical film. That is, according to the present invention, it is possible to already form a plurality of synthetic transverse seal portions at regular intervals on the tubular film behind the bag-shaped portion filled with the contents. For this reason, when a film formed into a cylindrical shape is conveyed in the vertical direction, even if the weight of the content filled in the bag-shaped portion of the suspended cylindrical film increases, a corrugated portion is formed in the film. Hateful. Therefore, it is possible to carry out a seal in which bags and contents are hardly present, and the sealing reliability and barrier property of the bag can be improved.

Further, the conventional hem seal method is such that the rectangular tube corresponding to the corner of the pipe is formed by bending a strip-like film so as to surround the rectangular tube-shaped pipe filling the contents and then forming the rectangular tube-shaped film. In this method, a hem seal is formed by picking and heating a film-like film portion. In this method, it is difficult to make the knob width (hem seal width) in the film portion uniform, and as a result, there is a problem that the lateral width of each side of the manufactured product varies.
In contrast, in the present invention, a hem seal is formed by heat-sealing the corners of the respective mountain folds in the V-shaped folds on the left and right sides of the cylindrical film formed by the method of the present invention described above. Is possible. That is, since the corners are already formed at the left and right side edges of the cylindrical film by V-shaped folding, a hem seal is formed at the corners by heating the left and right edges of the cylindrical film. Therefore, the management of the hem seal width is easy, and the lateral width of each side can be stably aligned with respect to the appearance of the manufactured product.

  ADVANTAGE OF THE INVENTION According to this invention, it is a prismatic-shaped gusset bag which has a square cross section in the state which put the content, and can manufacture the film packaging bag containing the content which can be independent. Moreover, the film packaging bag with a content which has high sealing reliability and a favorable external appearance shape can be manufactured.

It is a side view showing a schematic structure of a vertical bag making and filling machine according to an embodiment of the present invention. It is the figure of the vertical bag making and filling machine seen from the arrow A direction of FIG. It is the figure which looked at the bag making and filling machine in the direction of arrow A in FIG. It is a perspective view which shows the film by which the folding part was shape | molded by the folding sailor of FIG. It is the figure which showed the fold line etc. when folding a film in the shape of a gusset bag. It is the figure which showed the figure of the gusset bag formed by the fold line shown in FIG. 5 in the cross section of the film. (A) is a front view of the K seal bar of a 1st horizontal seal mechanism, (b) is the right view. It is a top view which shows the structure of the 2nd horizontal seal mechanism of this embodiment. (A) is a front view of K seal bar of a 2nd horizontal seal mechanism, (b) is the right view. It is a top view which shows the structure of the vertical seal | sticker mechanism of this embodiment. It is a top view which shows the structure of the sealing seal mechanism of this embodiment. It is an external view of the film packaging bag with a content manufactured by the manufacturing method of this invention. It is a perspective view which shows the film packaging bag with a gusset containing the contents manufactured with the bag making filling machine disclosed by patent document 1 and 2. FIG. It is a schematic perspective view which shows the bag making filling machine for manufacturing the film packaging bag with a hem seal disclosed by patent document 3. FIG.

Next, embodiments of the present invention will be described with reference to the drawings.
The vertical bag making and filling machine according to the present embodiment is a prismatic gusset bag having a square cross section with the contents put therein, and manufactures a film packaging bag containing the contents that can stand by itself. The contents include liquid or pasty beverages and foods.
FIG. 1 is a side view showing a schematic configuration of a vertical bag making and filling machine according to an embodiment of the present invention, and FIG. 2 shows a view of the vertical bag making and filling machine as seen from the direction of arrow A in FIG. .
Referring to FIG. 1, a vertical bag making and filling machine 1 according to this embodiment includes a film supply unit 2, a gusset forming unit 3, and a bag making and filling unit 4.

[Film supply unit 2]
In the film supply unit 2, a belt-like film 5 is wound in a roll shape and is pivotally supported. The film 5 is fed from the film supply unit 2 and is fed from the lower part to the upper part of the bag making and filling machine via a plurality of rollers 6a, 6b, 6c, etc. while being adjusted so as not to be slack or meander. . Then, the feeding direction of the film 5 is changed downward in the vertical direction by a guide sailor 7 (or roller sailor) as a forming mechanism located at the top of the bag making and filling machine 1.
The resin that can be used for the film 5 may be any resin as long as it is a resin that can be formed by heat welding or the like. For example, polyolefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, polybutene-1, and ethylene-vinyl acetate copolymer, and resins such as polyester and polyamide are used. Single-layer or multilayer films of these resins A heat sealable resin is used for the inner layer.

[Gazette molding part 3]
The gusset forming section 3 includes a folding sailor 8 that folds the film 5 to form a folded portion (gusset) of the gusset bag. The film 5 is conveyed while being folded by the folding sailor 8 from a flat state. FIG. 3 is a view of the bag making and filling machine as viewed in the direction of arrow A in FIG. 1. The state in which the left and right sides of the film 5 are folded and folded with the sailor 8 to form the folded portion (gusset) of the gusset bag. Show. FIG. 4 is a perspective view showing the film 5 in which the folded portion is formed by passing through the folded sailor 8.
5 shows a fold line when the film 5 is folded into a gusset bag, and FIG. 6 shows a shape of the gusset bag formed by folding at the fold line by a cross section of the film 5.
Referring to FIGS. 5 and 6, the film portion 1 a that is the front or back surface of the film packaging bag in the final form is predetermined on the right side from the center line of the belt-like film 5 (position of the second mountain fold line 12). The width W is defined. The right end of the film portion 1 a is a first mountain fold line 9, and the first trimming cut line 10 is a portion spaced from the first mountain fold line 9 to the right by a width W. An intermediate between the first mountain fold line 9 and the first trimming cut line 10 is a first valley fold line 11, and the film 5 is folded at the first mountain fold line 9 to form a first valley fold line. By folding the valley at 11, one of the folded portions (gussets) on the left and right side surfaces of the film packaging bag is formed.

Further, the left end of the film portion 1a described above is a second mountain fold line 12, and a portion separated from the second mountain fold line 12 on the left side by a width W is a third mountain fold line 13. A middle point between the third mountain fold line 13 and the second mountain fold line 12 is a second valley fold line 12. The film 5 is folded at the second mountain fold line 12, at the second valley fold line 14, and then at the third mountain fold line 13, so that the left and right side folds of the film packaging bag are folded. The other of the parts (gusset) is formed. However, the third mountain fold line 13 is not yet folded at the gusset forming portion 3.
The second trimming cut line 15 is a portion separated from the third mountain fold line 13 by a width W on the left side. The film portion along the second trimming cut line 15 is thermally welded to the film portion along the first trimming cut line 10, and the end portion other than the heat welding portion is finally trimmed. Become.

  In the present embodiment, a hole 16 (outlet) as an outlet for the bag contents is formed at the center position of the film portion 1a which is the front or back surface of the film packaging bag, and a plug 17 is attached to the hole 16. Being blocked. When manufacturing a film packaging bag provided with a plug 17, a plug attachment device (not shown) is provided in a region (see FIGS. 1 and 3) through which the film 5 passes between the film supply unit 2 and the gusset molding unit 3. It is possible to install. Further, when the stopper 17 is attached to the film 5, it is desirable to form a recess (see FIG. 3) through which the stopper 17 can pass in each of the rollers 6a to 6c, the guide sailor 7, and the like. However, the present invention is not limited to a method and an apparatus for manufacturing a film packaging bag having such a plug 17.

  In addition, the film portion 1b between the first mountain fold line 9 and the first valley fold line 11, the film portion 1c between the first valley fold line 11 and the first trimming cut line 10, and the second Holes 18 are formed in the film portion 1d between the mountain fold line 12 and the second valley fold line 14 and the film portion 1e between the second valley fold line 14 and the third mountain fold line 13, respectively. Yes. The holes 18 are arranged in a straight line in one horizontal direction. The hole 18 is formed by a drilling mechanism (not shown) at the position shown in FIG. Then, as shown in FIG. 6, when the film portions 1b, 1c, 1d, and 1e are folded, the positions of the holes 18 in the film portions 1b and 1c coincide with each other, and the positions of the respective holes 18 in the film portions 1d and 1e. There has also been a match. When the film portions 1a to 1f folded as shown in FIG. 6 are sandwiched between sealers such as the lateral seal mechanism 24 as will be described later, a synthetic lateral seal portion (also referred to as an end seal portion) is formed. Alternatively, the two film portions 1 a and 1 f which are the back surface are directly heat-welded through the holes 18. As a result, the adhesive strength of the synthetic lateral seal portion (end seal portion) is increased as compared with the case where the hole 18 is not provided. However, the present invention also includes a method and apparatus for manufacturing a film packaging bag in which a synthetic horizontal seal portion is formed without opening such holes 18.

  In addition, a film sterilization apparatus (not shown) may be arranged in the process from the film supply unit 2 or the plug attachment device (not shown) to the bag making and filling unit 4. In a film sterilization apparatus, an aqueous hydrogen peroxide solution is generally used as a sterilizing solution. It is preferable that the film and the plug drawn out from the film supply unit 2 are immersed in a sterilizing solution and then the sterilizing solution on the film and the plug is dried and then supplied to the bag making and filling unit 4.

  Further, as shown in FIG. 1, the first lateral seal mechanism 20 is installed at a position above the folding sailor 8 (downstream in the film transport direction) and below the roller 6c. The horizontal sealing mechanism 20 heat-welds (heat seals) the portion of the film 5 that is folded through the folding sailor 8 (particularly, the portion where the hole 18 is located). Therefore, the first horizontal seal mechanism 20 has a pair of K seal bars 21 that are disposed to face each other with the folded portion of the film 5 interposed therebetween. The pair of K seal bars 21 are moved opposite to each other by a drive source (not shown), and pressurizes and heats the folded portion of the film 5 between them. Thereby, the sandwiched portion is thermally welded. (Refer to the horizontal seal portion S1 in FIG. 3. However, in FIG. 3, the first horizontal seal mechanism 20 is not shown.) The film portions 1a to 1e are welded at this stage. Such heat sealing is performed while the feeding of the film 5 is stopped. Each K seal bar 21 may have a built-in heater (not shown), or only one K seal bar 21 may have a built-in heater (not shown).

  Refer to FIG. 7 for the configuration of the K seal bar 21 in the first lateral seal mechanism 20. 7A is a front view of the K seal bar 21, and FIG. 7B is a right side view thereof. According to these figures, the lateral heat for extending the lateral direction of the film 5 and thermally welding the folded portion of the film 5 on the pressing surface of the K seal bar 21 that pressurizes the film 5 with the film 5 interposed therebetween. A portion 21a is provided. Further, a pair of oblique heat portions 21b each having a V shape opened at an angle of about 90 degrees are provided on the upper side and the lower side of the horizontal heat portion 21a. In other words, a heat portion is configured such that one horizontal heat portion 21a and one oblique heat portion 21b are combined and looked K-shaped. With such a configuration of the K seal bar 21, the horizontal seal portion S1 shown in FIG. 3 is formed. In order to improve heat sealing, a layer of Teflon (registered trademark) is preferably provided on the surface of the K seal bar 21 that is in direct contact with the film 5.

[Bag making filling part 4]
Next, the bag making and filling unit 4 will be described.
Referring again to FIGS. 1 and 2, the bag making and filling unit 4 is configured below the guide sailor 7, and the bag making and filling unit 4 passes through the gusset forming unit 3 and the first lateral seal mechanism 20. The film 5 (hereinafter referred to as “film 5 ′”) formed as shown in FIGS. 3 and 4 and formed with the lateral seal portion S1 is formed and filled with contents. For this reason, when the film 5 ′ reaches the guide sailor 7 via the roller 6c, the feeding direction of the film 5 ′ is changed downward in the vertical direction. With this change of direction, the guide sailor 7 bends the film 5 'at the approximate center so that both lateral edges of the film 5' (see FIG. 4) are aligned, and the left and right side surfaces are folded inwardly into a V shape. The cylindrical film 5 ″ is formed. This folding point is the third mountain fold line 13 shown in FIGS.
The cylindrical film 5 ″ is fed downward by intermittent feeding of a predetermined film conveyance amount (P) by a feed roller 22 as a film conveyance mechanism. The conveyance amount P of the film packaging bag W for one unfilled bag Corresponding to the length in the longitudinal direction. Inside the tubular film 5 ″, a content input pipe 23 (also referred to as a nozzle) extends along the downward feeding direction of the tubular film 5 ″.

The pipe 23 enters the inside of the tubular film 5 ″ from the opening between both edges of the film 5 ′ to be combined when the film 5 ′ is formed into a tubular shape, and extends downward in the tubular film 5 ″. Yes. From the pipe 23, for example, drinking water is injected as contents. In the present embodiment, one pipe 23 is shown, but the number of pipes can be increased or decreased according to the type of contents. However, when installing a plurality of pipes 23, it is desirable to keep the plurality of pipes 23 in one bundle.
In the present embodiment, the pipe 23 extending downward in the tubular film 5 ″ is located at the approximate center in the lateral direction of the tubular film 5 ″. However, the present invention is not particularly limited to the position of the illustrated pipe 23. .

The bag making and filling unit 4 further includes a second horizontal seal mechanism 24, a vertical seal mechanism (hem seal mechanism) 26, a sealing seal mechanism 28, and a separation mechanism 29. Each mechanism will be described below.
Second lateral seal mechanism 24
The second horizontal sealing mechanism 24 is disposed below the position where the pipe 23 is inserted into the film from the left edge of the cylindrical film 5 ″ and above the vertical sealing mechanism 25. Further, the second lateral seal mechanism 24 has a pair of K seal bars 25 arranged to face each other with the tubular film 5 ″ interposed therebetween. The pair of K seal bars 25 are moved opposite to each other by a drive source (not shown), and pressurizes and heats the tubular film 5 ″ between them. Thereby, the sandwiched portions are thermally welded. The main purpose of welding is to bond the film portion 1f to the film portions 1c and 1e. Such heat sealing is performed while the feeding of the tubular film 5 "using the feeding roller 22 is stopped. Is called. Each K seal bar 25 may include a heater (not shown), or only one K seal bar 25 may include a heater (not shown). In order to improve the heat seal, a layer of Teflon (registered trademark) is preferably provided on the surface of the K seal bar 25 that is in direct contact with the tubular film 5 ″. Specifics of the second transverse seal mechanism 24 8 and 9 regarding this configuration, FIG. 8 shows the state of the second lateral sealing mechanism 24 and the tubular film 5 ″ as seen from the film feeding direction. 9A is a front view of the K seal bar 25, and FIG. 9B is a right side view thereof.

As shown in FIG. 9, the K seal bar 25 has a lateral heat portion 25 a and an oblique heat portion 25 b, similarly to the K seal bar 21 (see FIG. 7) of the first lateral seal mechanism 20. The lateral heat portion 25a and the oblique heat portion 25b are configured to match the shape of the portion sealed by the first lateral seal mechanism 20 (see the lateral seal portion S1 in FIG. 3).
However, since the pipe 23 passes through the inside of the cylindrical film 5 ″, the second horizontal sealing mechanism 24 is thermally welded except for the passage portion of the pipe 23 in the horizontal direction (width direction) of the cylindrical film 5 ″. It is necessary to perform (heat sealing). Therefore, the pair of K seal bars 25 are configured so as not to interfere with the pipe 23 extending in the longitudinal direction in the tubular film 5 ″ when the tubular film 5 ″ is sandwiched therebetween.

Each K seal bar 25 extends along the lateral direction of the tubular film 5 "and has a length approximately equal to the width of the tubular film 5". In order to prevent the pipes 23 from being crushed when the K seal bars 25 are brought close to each other, the portions of the respective K seal bars 25 that are crossed by the pipes 23 are provided with recesses 25c. Thereby, in the horizontal direction of the cylindrical film 5 ″, the portion corresponding to the pipe 23 is not thermally welded (heat-sealed) and can pass through the pipe 23.
The position of the second lateral seal mechanism 24 is such that the lateral seal portion S2 formed by the second lateral seal mechanism 24 is already formed by the first lateral seal mechanism 20 (hereinafter referred to as the first seal portion). It is set to overlap with S1 (refer to FIGS. 1 and 2). That is, after the formation of the first-stage horizontal seal portion S1, the cylindrical film 5 ″ is fed toward the second horizontal seal mechanism 25 by the feed roller 22. The cylindrical film 5 ″ is intermittently fed, that is, predetermined transported. It is sent by repeating conveyance and stoppage of the amount P. When the conveyance of the conveyance amount P of the tubular film 5 ″ is repeated a predetermined number of times from the time when the first-stage horizontal seal portion S1 is formed, the first The horizontal seal portion S <b> 1 at the stage is configured to be at the seal position of the second horizontal seal mechanism 25.
Using the second horizontal sealing mechanism 24 as described above, the horizontal seal portion S2 is formed on the cylindrical film 5 ″ except for the passage portion of the pipe 23, and the cylindrical film 5 ″ has a plurality of gusset bag-like shapes. It is divided into bag portions (hereinafter referred to as film packaging bags W).

Vertical seal mechanism (hem seal mechanism) 26
A vertical seal mechanism (hem seal mechanism) 26 is disposed below the second horizontal seal mechanism 24 and above the feed roller 22.
The vertical seal mechanism 26 forms hem seals at the corners of the four corners of the tubular film 5 ″ as shown in FIG. 6. Such hem seals can self-support bag-packed products manufactured by this apparatus. Regarding the configuration, please refer to Fig. 10. Fig. 10 shows the state of the cylindrical film 5 "and the vertical sealing mechanism 26 as seen from the film feeding direction.
As shown in FIG. 10, the vertical sealing mechanism 26 includes a pair of vertical heaters disposed so as to face each other between the cylindrical film 5 ″ in two regions where the left edge and the right edge of the cylindrical film 5 ″ pass. It has a bar 26a. A vertical heater bar receiving plate 26b is interposed between the pair of vertical heater bars 26a, and the vertical heater bar receiving plate 26b penetrates into a V-shaped valley in the folded portion on the left and right sides of the tubular film 5 ″. A heater as a heating means is built in the vertical heater bar 26a.
In a state where the vertical heater bar receiving plate 26b has entered the valley of the folded portion of the tubular film 5 ″, the pair of vertical heater bars 26a are opposed to each other by a drive source (not shown). Thereby, the pair of vertical heater bars 26a. Of the cylindrical film 5 ″, ie, between one of the vertical heater bar receiving plate 26b and between the other of the pair of vertical heater bars 26a and the vertical heater bar receiving plate 26b. The corner is sandwiched. And a heat seal part (hem seal) is formed in the corner by pressurization and heating by a pair of vertical heater bars 26a.

More specifically, as shown in FIG. 6, the tubular film 5 ″ includes the first mountain fold line 9, the second mountain fold line 12, the third mountain fold line 13, and the trimming cut lines 10 and 15. Corner portions are formed at the positions. For each corner portion, a heat seal portion (hem seal) is formed with a predetermined width along the longitudinal direction (vertical direction) of the tubular film 5 ″ by the vertical seal mechanism 26. . The hem seal is preferably performed in a state where the contents are not filled in the film packaging bag W.
The trimming cut lines 10 and 15 shown in FIG. 6 correspond to locations where both side edges of the film 5 ′ are aligned when forming the cylindrical film 5 ″. Both sides of 5 ′, that is, film portions along the trimming cut lines 10 and 15 are heat-welded with the predetermined width, and at this time, end 51 of both sides of film 5 ′ that is not heat-welded. May be previously removed by cutting the film 5 ′ along the trimming cut lines 10 and 15 by the cutter 27 (see FIGS. 1 and 2).

In order to improve heat sealing, a layer of Teflon (registered trademark) is preferably provided on the surfaces of the vertical heater bar 26a and the vertical heater bar receiving plate 26b that are in direct contact with the tubular film 5 ″. In order to improve the standing of the formed bag, a reinforcing material that reinforces the hem seal portion may be attached at the position of the vertical seal mechanism 26.
Such vertical sealing is performed while the feeding of the cylindrical film 5 ″ using the feeding roller 22 is stopped. After the formation of the vertical sealing portion (hem seal), the cylindrical roller 5 ″ is moved by the feeding roller 22. When the sheet is moved by a predetermined conveyance amount P and stopped, the vertical seal mechanism 26 is activated again.
When the hem seal described above is completed, the film packaging bag W is sealed except for the pipe passing portion of the lateral seal portion S2.
A feed roller 22 is installed below the vertical seal mechanism 26 described above. It is also possible to arrange the vertical seal mechanism 26 above the second horizontal seal mechanism 24.

Sealing seal mechanism 28
Further, below the vertical sealing mechanism 26 and at a position separated from the position of the second horizontal sealing mechanism 24 by a film conveying amount corresponding to the conveying operation of the feeding roller 22 a predetermined number of times (in this example, five times). A sealing device 28 is installed.
The sealing mechanism 28 performs heat sealing on the passage portion of the pipe 23 in the transverse seal portion S2 formed in the transverse direction of the cylindrical film 5 ″ by the second transverse seal mechanism 24, and thereby passes the passage portion of the pipe. It is a blockade.
As shown in FIG. 1, the sealing mechanism 28 has a horizontal heater bar 28a and a horizontal heater receiving bar 28b opposed to each other with the tubular film 5 ″ interposed therebetween. The horizontal heater bar 28a and the horizontal heater receiving bar 28b The non-adhered portion NS that was the passage portion of the pipe 23 of the transverse seal portion S2 of the cylindrical film 5 ″ is pressed and heated by the driving source (not shown). Part NS is heat sealed.

  Referring specifically to FIG. 11 (plan view of the configuration example of the sealing seal mechanism 9 viewed from the vertical direction in FIG. 1), the horizontal heater bar 28a and the horizontal heater receiving bar 28b are formed of a cylindrical film. It extends along the horizontal direction 5 ″ and has a length equal to or longer than the horizontal direction of the tubular film 5 ″. The horizontal heater bar 28a has a heater block 28a1 containing a heater as a heating means for heat-sealing the non-bonded portion NS, and two pressure blocks 28a2 arranged on both sides in the horizontal direction of the heater block 28a1. . The horizontal heater receiving bar 28b includes a heater receiving block 28b1 that is a receiving portion of the heater block 28a1 and a pressure receiving block 28b2 that is a receiving portion of the two pressure blocks 28a2.

Silicon rubber is preferably provided on the surfaces of the pressure block 28a2 and the pressure receiving block 28b2 that are in direct contact with the tubular film 5 ″. The film portion that has been heat-sealed by the second lateral seal mechanism 24 is added. When sandwiched between the pressure block 28a2 and the pressure receiving block 28b2, the silicon rubber prevents the film portion from being damaged.
Both the heater block 28a1 and the heater receiving block 28b1 are made of only metal (for example, stainless steel). In addition, the heater block 28a1 and the heater receiving block 28b1 protrude toward the tubular film 5 ″ side from the pressure block 28a2 and the pressure receiving block 28b2. Such a configuration has the heater block 28a1 and the heater receiving block 28b1. When the non-adhesive portion NS is sandwiched between the inner surfaces of the films, the inner surfaces of the films are tightly adhered to each other, and the contents such as the beverage filled in the cylindrical film 5 ″ and entering the gap between the non-adhesive portions NS Plays an effect of scattering from the gap. By this action, a heat seal portion free from liquid contents such as beverages can be formed.

In addition, the horizontal heater bar 28a and the horizontal heater receiving bar 28b are positioned in the horizontal direction of the cylindrical film 5 "prior to sandwiching the cylindrical film 5" between the horizontal heater bar 28a and the horizontal heater receiving bar 28b, respectively. It is preferable to provide a mechanism (not shown) for pulling the tubular film 5 ″ laterally outward while holding both sides. The tubular film 5 ″ is sandwiched between the lateral heater bar 28a and the lateral heater receiving bar 28b. When the tubular film 5 ″ is pulled in the lateral direction before, the gap of the non-adhesive portion NS is reduced, and the contents can be expelled from the gap. In addition, wrinkles are formed in the non-adhesive portion NS. It can also be prevented from being heat-sealed in the state of entering.
Note that the lower end (exit end) 23a of the pipe 23 extending downward through the non-adhesive portion NS of the tubular film 5 '' penetrates into the film packaging bag W of the portion filled with the contents. In the present embodiment, the pipe lower end 23a is positioned upward from the position of the blocking seal mechanism 28 up to a place where the film transport amount corresponding to one transport operation of the feed roller 22 is traced back.

  In addition, a pair of squeeze rollers 30 including two columnar rollers that are rotated in synchronization with the rotation of the feed roller 22 is provided above the sealing and sealing mechanism 28. Each squeeze roller 30 divides the contents in the cylindrical film 5 ″ by sandwiching the cylindrical film 5 ″ to form an empty portion in the cylindrical film 5 ″. Each squeeze roller 30 is a cylindrical tube. The non-adhesive part NS is sandwiched between the squeeze rollers 30 when the non-adhesive part NS passes through the position of the squeeze roller 30. By transporting the tubular film 5 ″ in the state, it is possible to expel the filler from the inside of the non-bonded portion NS.

Separation mechanism 29
Further, a separation mechanism 29 is installed below the sealing mechanism 28. The separation mechanism 29 separates the film packaging bag W enclosing the contents from the tubular film 5 ″.
The separation mechanism 29 is disposed at a position separated from the position of the sealing mechanism 28 by a film conveyance amount (P) corresponding to one conveyance operation of the feed roller 2. The separation mechanism 29 has a cutter bar 29a and a cutter receiving bar 29b. The cutter bar 29a and the cutter receiving bar 29b are opposed to each other by a drive source (not shown). A blade (not shown) that cuts the horizontal seal portion formed by the first horizontal seal mechanism 20, the second horizontal seal mechanism 24, and the sealing seal mechanism 28 over the entire length in the horizontal direction of the tubular film 5 ″ is a cutter bar. 29a is provided on a surface facing the cutter receiving bar 29b, and a recess (not shown) for receiving the blade is formed on the cutter receiving bar 29b. The film packaging bag W containing the contents is separated from the lowermost end of the tubular film 5 ″ by cutting the transverse seal portion of the tubular film 5 ″ along the transverse direction of the tubular film 5 ″. It is.
The separation mechanism 27 is folded or bonded so that the lateral seal portion located at the bottom of the film packaging bag W containing the contents is in close contact with the bag body during or after the operation of the sealing mechanism 28. It is preferable that a mechanism for forming the bottom of the packaging bag W flat is added.

[Production method]
Next, with reference to mainly FIG. 1 and FIG. 2, the process of manufacturing the film packaging bag containing a content using the vertical bag-making filling machine of this embodiment is demonstrated. The produced film wrapping bag with contents is a prismatic bag having a square cross section, and is a bag that is self-supporting and has a gable top shape.
The film 5 held in a roll shape by the film supply unit 2 is fed by the rotation of the feed roller 22 and sent to the guide sailor 7 at the upper part of the bag making and filling machine via the rollers 6a, 6b, 6c and the like. The feed roller 22 performs an intermittent rotation operation to feed out the film 5.
The film supply unit 2 of the present embodiment includes an accumulator that absorbs fluctuations in tension applied to the film 5 during intermittent feeding, a guide mechanism that corrects meandering of the film 2 and stabilizes the feeding direction, and the like.
When the film 5 is unwound, the holes 16 and 18 shown in FIG. 5 are opened. When the film 5 passes through the roller 6a, the plug 17 is inserted into the hole 16 and welded to the film 5 by a plug welding unit (not shown). Thereafter, the film 5 enters the folding sailor 8 of the gusset forming portion 3 via the roller 6b. A concave groove is formed in the roller 6b so as not to interfere with the plug 17.

In the process in which the film 5 passes through the folding sailor 8, the film 5 is folded as shown in FIG. FIG. 4 is a perspective view showing the appearance of the film 5 at this time. For the positions of the mountain fold line and the valley fold line when the film 5 is folded, refer to FIG.
The film 5 folded in the form shown in FIGS. 3 and 4 is sent between a pair of K seal bars 21 of the first lateral seal mechanism 20. The folded portion of the film 5 is sandwiched between the pair of K seal bars 21 and is pressurized and heated, whereby the first-stage horizontal seal portion S1 is formed. This horizontal seal portion S1 is a portion formed by welding the film portions 1a to 1e at the positions of the holes 18 (see FIGS. 4 and 5).
The film 5 ′ that has passed through the first lateral sealing mechanism 20 reaches the guide sailor 7 via the roller 6. At the position of the guide sailor 7, the feeding direction of the film 5 'is changed downward in the vertical direction. With this change in direction, the guide sailor 7 bends the film 5 ′ at substantially the center so that both edges (see FIG. 4) of the film 5 ′ in the horizontal direction are aligned. Thereby, a cylindrical film 5 ″ having both side edges folded in a V shape is formed (see FIG. 2).

Subsequently, the tubular film 5 ″ is sent between the pair of K seal bars 25 of the second lateral seal mechanism 24. The tubular film 5 ″ is sandwiched between the pair of K seal bars 25 to pressurize and heat. Thus, the second-stage horizontal seal portion S2 is formed to match the position and shape of the first-stage horizontal seal portion S1 (see FIGS. 2 and 3). This horizontal seal portion S2 is a portion formed by welding the film portion 1f mainly with the film portions 1c and 1e at the position of the first-stage horizontal seal portion S1 (see FIGS. 5 and 6).
The combined first-stage and second-stage horizontal seal portions (hereinafter referred to as “composite horizontal seal portions”) substantially partition the inside of the tubular film 5 ″ in the longitudinal direction. Is formed into the cylindrical film 5 ″ every time the conveyance of the predetermined conveyance amount P is completed. However, at this stage, the passage portion of the pipe 23 is not heat-sealed. The portion where both side edges of the film 5 ′ are combined when forming the cylindrical film 5 ″ (the trimming cut lines 10 and 15 shown in FIG. 6) is not yet heat-sealed.

After the composite transverse seal portion is formed, the tubular film 5 ″ is fed to the side of the longitudinal seal mechanism (hem seal mechanism) 26. At this time, the left and right edges of the tubular film 5 ″ are respectively the longitudinal seal mechanism 26. Between the pair of vertical heater bars 26a. In addition, the vertical heater bar receiving plate 26b enters the V-shaped valleys in the folded portions on the left and right sides of the tubular film 5 ″ (see FIGS. 1 and 2).
In this state, the pair of vertical heater bars 26a on the left and right sides of the tubular film 5 ″ are opposed to each other by a drive source (not shown). Thereby, one of the pair of vertical heater bars 26a and the vertical heater are moved. A mountain fold portion, that is, a corner portion of the tubular film 5 ″ is sandwiched between the bar receiving plate 26b and between the other of the pair of vertical heater bars 26a and the vertical heater bar receiving plate 26b. And a heat seal part (hem seal) is formed in the corner by pressurization and heating by a pair of vertical heater bars 26a. At this time, a place where both side edge portions of the film 5 ′ are combined (at the trimming cut lines 10 and 15 shown in FIG. 6) at the time of forming the tubular film 5 ″ is heat-welded. The end portions of both side edges of 'that are not thermally welded are previously removed by cutting the film 5 ′ along the trimming cut lines 10 and 15 by a cutter 27 (see FIGS. 1 and 2).
Such a vertical seal (hem seal) is formed on the cylindrical film 5 ″ every time the cylindrical film 5 ″ is transported by a predetermined transport amount P.

When the tubular film 5 ″ with the vertical seal formed as described above moves to the downstream side by intermittent feeding, the first composite lateral seal portion of the tubular film 5 ″ reaches the blocking seal mechanism 28. At this time, the horizontal heater bar 28a and the horizontal heater receiving bar 28b of the sealing mechanism 28 are moved opposite to each other by a driving device (not shown), whereby the non-adhesive portion which is the passage portion of the pipe 23 of the synthetic horizontal seal portion. NS is heat sealed (hereinafter referred to as a sealing seal). In particular, the non-bonded portion NS is pressurized and heated by the heater block 28a1 and the heater receiving block 28b1.
Prior to performing the sealing by the sealing mechanism 28, it is preferable to pull the tubular film 5 ″ laterally outward while holding both lateral sides of the tubular film 5 ″. As a result, it is possible to prevent the non-adhered portion NS from being heat-sealed in a state in which wrinkles enter.

Through the steps so far, a film packaging bag W having a part of the upper end opened at the lowermost part of the tubular film 5 ″ is formed. That is, in the synthetic transverse seal portion corresponding to the lower end of the film packaging bag W. The passage portion of the pipe 23 is sealed, but only a part of the synthetic lateral seal portion corresponding to the upper end of the film packaging bag W is still open as the passage portion of the pipe 23. And the lower end 23a of the pipe 23 is film packaging. It passes through the synthetic lateral seal at the upper end of the bag W and enters the film packaging bag W.
When the film packaging bag W is formed as described above, a predetermined amount of contents are filled into the film packaging bag W from the pipe 23. At this time, the contents are filled up to the passage portion of the pipe 23 in the synthetic horizontal seal portion at the upper end of the film packaging bag W.

  After the filling of the contents, the cylindrical film 5 ″ is again fed by the transport amount P by the feed roller 22. During the transport by this transport amount P, the film packaging bag W filled with the contents is a pair of squeeze rollers. The remaining amount is transported from this state between 30. The timing for starting the clamping operation of the squeeze roller 30 is just before the combined horizontal seal portion at the upper end of the film packaging bag W reaches the position of the squeeze roller 30. Contents such as beverages filled in the gaps of the non-adhesive portion NS by feeding the film packaging bag W downward while sandwiching the film packaging bag W filled with the contents between a pair of squeeze rollers 30 Can be expelled from this gap.

Thereafter, the non-adhesive portion NS, which is the passage portion of the pipe 23, of the synthetic horizontal seal portion at the upper end of the film packaging bag W filled with the contents is heat-sealed by the sealing seal mechanism 28. At this time, the non-bonded portion NS is firmly sandwiched between the metal heater block 28a1 and the metal heater receiving block 28b1. As a result, there is also an effect that the content such as a beverage filled in the gap of the non-adhesive portion NS is scattered from the gap and the content does not remain in the synthetic horizontal seal portion. It is also desirable to pull the tubular film 5 ″ laterally outward while holding the lateral sides of the tubular film 5 ″ prior to performing the sealing with the sealing mechanism 28. Thereby, it can prevent that a wrinkle enters into a horizontal seal part from the influence of the weight of the contents. Prior to the sealing, the content such as a beverage can be expelled from the gap between the non-adhesive portions.
During or after the operation of the sealing and sealing mechanism 28, the bottom of the film packaging bag W is folded or bonded so that the lateral sealing portion located at the bottom of the film packaging bag W containing the contents is in close contact with the bag body. It is preferable to form it flat. This process can be added at the position of the separation mechanism 29.
As described above, the film packaging bag W filled with the contents is manufactured. In particular, according to the manufacturing method of the present embodiment, the content-packed film packaging bag is a prismatic gusseted bag having a square cross section in the state in which the contents are put, and can be self-supporting. That is, a packaging product similar to a gable top paper container such as a 1-liter milk pack can be made of a film (resin sheet).

Thereafter, the cylindrical film 5 ″ is fed by the transport amount P. The synthetic horizontal seal portion at the lower end of the film packaging bag W reaches between the cutter bar 29a and the cutter receiving bar 29b of the separation mechanism 29. At this time, the cutter bar 29a Is moved toward the cutter receiving bar 29b, and the synthetic lateral seal portion at the lower end of the film packaging bag W is cut along the lateral direction of the tubular film 5 ″. Subsequently, by retracting the cutter bar 29a from the cutter receiving bar 29b, the film packaging bag W containing the contents is separated and dropped from the lowermost end of the tubular film 5 ″.
By repeating the series of operations described above, the film packaging bag W containing the contents (see FIG. 12) can be continuously manufactured.

Moreover, according to embodiment mentioned above, there exists an effect as demonstrated below.
In the vertical bag making and filling machine of the present invention, the shape of the product (film packaging bag W containing the contents) can be made into the shape of a prism having a square cross section. As shown in FIG. 5, the film portions 1 a and 1 f that are the front or back of the film packaging bag each have a width W, and the film portion between the first mountain fold line 9 and the first valley fold line 11. 1b has a width W / 2, the film portion 1c between the first valley fold line 11 and the first trimming cut line 10 has a width W / 2, and the second mountain fold line 12 and the second The film portion 1d between the valley fold lines 14 has a width W / 2, and the film portion 1e between the second valley fold line 14 and the third mountain fold line 13 has a width W / 2. The film 5 is sequentially passed through the folding sailor 8 of the gusset molding unit 3 and the guide sailor 7 of the bag making filling unit 4 so that the film 5 is folded at the positions of these folding lines. As a result, the film 5 is formed into a tubular film 5 ″ (see FIG. 6) in which the left and right sides are folded inwardly in a V shape.
The film 5 ′ after the film 5 has passed through the gusset forming portion 3 has the shape shown in FIG. 4, and the film 5 ′ includes the film portion 1 f and the film portion 1 c or 1 e with the contents filling pipe 23. It is bent by the guide sailor 7 of the bag making and filling unit 4 so as to be positioned between.

  As described above, the present invention adopts a method in which the film portion (1b to 1d) that becomes the gusset of the gusset bag is folded to the center as shown in FIG. In other words, unlike the prior art, it is not a method of bending the film so as to cover the bag-filling cylinder and then forming the cylindrical film and then folding the left and right sides of the cylindrical film inward. The film portions (1b to 1d) to be formed can be folded to the center. Accordingly, when the contents are put into the cylindrical film 5 ″, the cylindrical film 5 ″ swollen by the contents is in the shape of a prism having a square cross section. Thus, according to the bag shape of the prism, boxing at the time of transportation and display on the merchandise display shelf can be performed efficiently.

  Further, as shown in FIG. 6, by folding the left and right sides of the tubular film 5 ″ to the center, the first horizontal sealing mechanism 20 and the second horizontal sealing mechanism 24 are welded when performing horizontal sealing. The number of films (number of layers) can be made the same in the lateral direction of the bag, so that the sealing strength of the lateral seal portion becomes uniform in the lateral direction of the bag, and the reliability of the heat seal portion is improved. In addition, ultrasonic welding can be performed instead of heat welding for the formation of the lateral seal portion.

In addition, since the hem seal at one corner on the side of the bag also serves as a splicing of the film 5 'when formed on the tubular film 5 ", a film splice is provided at the center of the side of the manufactured film packaging bag. Therefore, there is no problem that the layout of the printed image drawn on the peripheral surface of the product is limited by the joint.
Further, the bag can be laid with the bag reinforced by hem seals formed at the four corners on the side of the bag.

Further, the hem seal is performed before the contents are filled in the tubular film 5 ″. In addition, the hem seal mechanism 26 used in the present invention has a corner portion at each folded portion of the tubular film 5 ″. A hem seal is formed by heating with both corners sandwiched with the plates 26b inserted in the valleys between the corners. For these reasons, hem seals can be formed with high accuracy and the same width for each corner. As a result, the appearance of the manufactured product is the same in the width of the four side surfaces.
In addition, the embodiments of the present invention described below also improve sealing reliability and barrier properties for film packaged products filled with contents.

That is, in the case of the prior art (for example, Patent Documents 1 to 3), the first horizontal seal portion is formed on a cylindrical film, and the content is contained in the film with the first horizontal seal portion as the bottom. After a thing is thrown in, the method of making the film packaging bag with which the content was filled in a part of cylindrical film is formed by forming the 2nd horizontal seal part in this film.
In such a conventional manufacturing method, the contents are put into a tubular film suspended from one horizontal seal portion as a bottom. In this state, as the weight of the content required for the product increases, the tubular film swells, so that the seal portion around the tubular film is broken and a portion that is undulated on the film surface is likely to be formed. For this reason, when forming the 2nd horizontal seal part after contents were thrown in, there was a possibility that a crack might enter into this horizontal seal part. In order to suppress this, there is a method of performing horizontal sealing in a state where the film of the laterally sealed portion is pulled outward, but if the content is heavy, a large pull is required to eliminate the wavy portion. I need power. As a result, a large pull drive is required and the film may be damaged.

In contrast to such a conventional technique, in the case of the present invention, the cylindrical film 5 ″ is conveyed by the first horizontal sealing mechanism 20 and the second horizontal sealing mechanism 24 while the cylindrical film 5 ″ is conveyed intermittently. A plurality of composite transverse seal portions are formed at 5 ″ except for a passage portion of the pipe 23. Thereby, the cylindrical film 5 ″ is partitioned into a plurality of bag-like portions (portions that will later become film packaging bags W) before the contents are charged.
Further, below the second lateral seal mechanism 24, vertical sealing is performed at the mountain folds, that is, the corners at the left and right side edges of the cylindrical film 5 ". A cylindrical shape for allowing the pipe 23 to enter the inside. The opening at the left edge of the film 5 "is closed when this longitudinal sealing is performed.
Then, the liquid or paste-like contents are put into the film packaging bag W located at the lowermost part (the top) of the suspended tubular film 5 ". Before the contents are put, the tubular film 5" The non-adhesive part NS which was the passage part of the pipe 23 of the synthetic | combination horizontal seal part of the lower end of the film packaging bag W located in the lowermost part is heat-sealed by the sealing mechanism 28. After the contents are charged, the non-adhesive part NS, which is the passage part of the pipe 23, of the synthetic horizontal seal part at the upper end of the film packaging bag W is heat-sealed by the sealing mechanism 28. As a result, the film packaging bag W filled with the contents is completed at the bottom of the cylindrical film 5 ″.

In the present invention, a plurality of synthetic transverse seal portions are already formed at regular intervals on the tubular film 5 ″ on the upstream side of the film packaging bag W into which the contents are charged. Since the front side and the back side of the tubular film 5 "are bonded with a plurality of synthetic transverse seals before the film is rolled, the film can be corrugated even if the weight of the contents required for the product increases. Hateful.
In addition, the non-bonded portion NS, which is the passage portion of the pipe 23, of the synthetic lateral seal portion is a narrower portion than the overall length of the lateral seal portion. By firmly sandwiching this part from both sides with two metal blocks (the heater block 28a1 and the heater receiving block 28b1), the contents intervening in the gap of this part are scattered from the gap, and the contents intervene in the heat seal portion. I try not to. Furthermore, before sandwiching between the two metal blocks, by pulling the film of the part to be laterally sealed to both outer sides, it is possible to assist the action of preventing the heat seal part from containing any wrinkles or contents.

  In addition, the manufacturing method of the vertical bag making and filling machine and the film packaging bag with contents of the present embodiment is a prismatic gusset bag having a square cross section and can be placed in a standing state. Although the main purpose is to manufacture a packaging bag, the present invention may be applied to a bag-packed product of another aspect. That is, if the user desires a film packaging bag containing the contents without hem seal, the vertical seal mechanism 26 may be changed to one having only a mechanism for welding both lateral edges of the belt-like film 5 '. Further, if the user desires a prismatic gusseted bag having a rectangular cross section with the contents placed, the folding sailor 8 may be replaced to change the V-shaped folding amount. Even when these embodiments are manufactured, the sealing reliability of the bag-packed product can be expected to be improved for the reasons described above, as compared with the methods listed in the prior art.

DESCRIPTION OF SYMBOLS 1 Vertical type bag making and filling machine 2 Film supply part 3 Gusset molding part 4 Bag making filling part 5 Band-shaped film 5 'Film 5 after passing through a gusset forming part "Cylindrical films 6a, 6b, 6c Roller 7 Guide sailor 8 Folding sailor 9 First mountain fold line 10 First trimming cut line 11 First valley fold line 12 Second mountain fold line 13 Third mountain fold line 14 Second valley fold line 15 Second trimming cut Line 16 Hole for plug attachment 17 Plug 18 Hole 20 First horizontal seal mechanism 21, 25 K seal bar 21a, 25a Horizontal heat part 21b, 25b Diagonal heat part 22 Feed roller 23 Pipe 24 Second horizontal seal mechanism 25c Recess 26 Vertical seal mechanism (hem seal mechanism)
26a Vertical heater bar 26b Vertical heater bar receiving plate 27 Cutter 28 Sealing seal mechanism 28a Horizontal heater bar 28b Horizontal heater receiving bar 28a1, 28b1 Heater block 28a2, 28b2 Pressure receiving block 29 Separating mechanism 29a Cutter bar 29b Cutter receiving bar W Film packaging bag

Claims (17)

While forming a gusset bag-shaped bag portion from a band-shaped film, forming a hem seal at the corner of the side surface of the gusset bag-shaped bag portion, and filling the contents into the gusset bag-shaped bag portion A method of manufacturing a film packaging bag containing goods,
Folding the strip-shaped film portion corresponding to the folded portions on the left and right sides of the gusset bag-shaped bag portion;
Forming a first-stage lateral seal portion by heat-sealing the folded portion of the strip-shaped film over the lateral direction of the portion; and
The belt-like film on which the first-stage horizontal seal portion is formed so as to form a cylindrical film that surrounds the pipe filling the contents and is folded in a V shape on the left and right sides. Bending and aligning both lateral edges of the strip-shaped film; and
By forming a second-stage horizontal seal portion on the cylindrical film so as to match the position and shape of the first-stage horizontal seal portion except for the passage portion of the pipe, the first-stage Forming a combined horizontal seal portion in which the second-stage horizontal seal portion is combined, and partitioning the tubular film into a gusset bag-like bag portion;
The synthetic transverse seal portion corresponding to the lower end of the gusset bag-shaped bag portion partitioned by the cylindrical film is heat-sealed at a non-adhesive portion that was a passage portion of the pipe, and a gap between the non-adhesive portions is obtained. A step of blocking
Filling the contents from the outlet end of the pipe into the gusset bag-shaped bag section partitioned into the tubular film;
The manufacturing method of the film packaging bag containing a content which has. While forming a gusset bag-shaped bag portion from a band-shaped film, forming a hem seal at the corner of the side surface of the gusset bag-shaped bag portion, and filling the contents into the gusset bag-shaped bag portion A method of manufacturing a film packaging bag containing goods,
Folding the strip-shaped film portion corresponding to the folded portions on the left and right sides of the gusset bag-shaped bag portion;
Forming a first-stage lateral seal portion by heat-sealing the folded portion of the strip-shaped film over the lateral direction of the portion; and
The belt-like film on which the first-stage horizontal seal portion is formed so as to form a cylindrical film that surrounds the pipe filling the contents and is folded in a V shape on the left and right sides. Bending and aligning both lateral edges of the strip-shaped film; and
By forming a second-stage horizontal seal portion on the cylindrical film so as to match the position and shape of the first-stage horizontal seal portion except for the passage portion of the pipe, the first-stage And a step of forming a combined horizontal seal portion in which the second-stage horizontal seal portion is combined,
Partitioning the tubular film into a plurality of gusset bag-shaped bag portions by forming the synthetic transverse seal portion at a constant interval in the longitudinal direction of the tubular film;
Filling the contents from the outlet end of the pipe into the leading gusset bag-shaped bag portion of the plurality of gusset bag-shaped bag portions partitioned into the tubular film;
Prior to filling the contents, heat sealing is performed on the non-adhesive portion of the synthetic lateral seal portion corresponding to the lower end of the leading gusset bag-like bag portion, which is the passage portion of the pipe. After the gap is sealed and the contents are filled, heat sealing is performed on the non-adhesive portion, which was the passage portion of the pipe, of the synthetic lateral seal portion corresponding to the upper end of the leading gusset bag-shaped bag portion. Sealing the gap between the non-adhered portions,
After the top gusset bag-like bag portion is filled with the contents and the gap between the non-adhesive portions of the synthetic lateral seal portion corresponding to the upper end of the gusset bag-like bag portion is sealed, the gusset bag Separating the bag-shaped bag part from the tubular film;
The manufacturing method of the film packaging bag containing a content which has. The gusset bag-like aspect of the left and right in the gusset bag-shaped bag portion when the content is filled in the bag portion, as the front surface, and rear surface of the width is equal properly, the gusset bag-like The manufacturing method of the film packaging bag containing a content of Claim 1 or 2 which performs the process of folding in the part of the said strip | belt-shaped film corresponded to the folding part of the right and left both sides of a bag part.   In the step of bending the belt-like film so as to form the tubular film and aligning both edges in the lateral direction of the belt-like film, the two edges are joined together in the horizontal direction of the tubular film. 4. The process according to claim 1, wherein a step of folding the band-shaped film portion corresponding to the folded portions on both the left and right sides of the gusset bag-shaped bag portion is performed so as to be positioned at one end portion in the direction. Of manufacturing a film packaging bag containing the contents.   5. The method according to claim 1, further comprising a step of heat-sealing the corners of each mountain fold portion for forming a V-shaped fold on the left and right sides of the tubular film to form a hem seal. The manufacturing method of the film packaging bag containing the content of description.   The step of forming the hem seal includes sandwiching the corners of the mountain folds in a state where a plate is inserted in the valley between the mountain folds for forming the V-shaped folds on the left and right sides of the cylindrical film. The manufacturing method of the film packaging bag containing the content of Claim 5 including forming a hem seal by heating.   The manufacturing method of the film packaging bag containing a content of any one of Claim 1 to 6 with which the said cylindrical film is conveyed so that the longitudinal direction of the said cylindrical film may become a vertical direction. While forming a gusset bag-shaped bag portion from a band-shaped film, forming a hem seal at the corner of the side surface of the gusset bag-shaped bag portion, and filling the contents into the gusset bag-shaped bag portion An apparatus for manufacturing a film packaging bag containing goods,
A gusset forming part for folding the part of the band-like film corresponding to the folded part on the left and right sides of the bag part of the gusset bag shape,
A seal bar disposed opposite to a portion where the band-like film is folded in the gusset forming portion, and the first-stage transverse seal portion is subjected to heat sealing with the seal bar in the lateral direction in the folded portion. A first lateral sealing mechanism forming
The belt-like film on which the first-stage horizontal seal portion is formed is folded so as to form a cylindrical film in which both the left and right sides are folded inwardly in the V shape. A forming mechanism for aligning the edges,
The content, which penetrates into the inside of the cylindrical film from the opening between both lateral edges of the strip-shaped film combined by the forming mechanism and extends along the length direction of the cylindrical film Pipes for filling things,
A seal bar disposed opposite to the cylindrical film, and the second position of the seal bar so as to match the position and shape of the horizontal seal portion of the first stage excluding the passage portion of the pipe; By forming the horizontal seal portion of the eye on the cylindrical film, a composite horizontal seal portion is formed by combining the first and second horizontal seal portions, and the cylindrical film is gusseted. A second lateral sealing mechanism that partitions into a bag-shaped bag portion;
It is installed before the outlet end of the pipe, and heat seals to the non-adhesive portion that was the passage portion of the pipe of each of the synthetic transverse seal portions corresponding to the lower end and the lower end of the gusset bag-shaped bag portion. A sealing mechanism for sealing the gap of the non-adhered portion,
An apparatus for manufacturing a film packaging bag containing contents. While forming a gusset bag-like bag portion from a belt-shaped film, forming a hem seal at the corners on the side of the gusset bag-like bag portion, and filling the gusset bag-like bag portion with the contents, the contents An apparatus for manufacturing a film packaging bag containing goods,
A gusset forming part for folding the part of the band-like film corresponding to the folded part on the left and right sides of the bag part of the gusset bag shape,
A seal bar disposed opposite to a portion where the band-like film is folded in the gusset forming portion, and the first-stage transverse seal portion is subjected to heat sealing with the seal bar in the lateral direction in the folded portion. A first lateral sealing mechanism forming
The belt-like film on which the first-stage horizontal seal portion is formed is folded so as to form a cylindrical film in which both the left and right sides are folded inwardly in the V shape. A forming mechanism for aligning the edges,
The content, which penetrates into the inside of the cylindrical film from the opening between both lateral edges of the strip-shaped film combined by the forming mechanism and extends along the length direction of the cylindrical film Pipes for filling things,
A seal bar disposed opposite to the cylindrical film, and the second position of the seal bar so as to match the position and shape of the horizontal seal portion of the first stage excluding the passage portion of the pipe; By forming the horizontal seal portion of the eye on the cylindrical film, a combined horizontal seal portion is formed by combining the first and second horizontal seal portions, and the combined horizontal seal portion is further A second lateral sealing mechanism that is formed at regular intervals in the longitudinal direction of the tubular film and divides the tubular film into a plurality of gusset bag-like bag portions;
From the outlet end of the pipe to the leading gusset bag-like bag portion of the plurality of gusset bag-like bag portions that are installed before the outlet end of the pipe and partitioned into the cylindrical film Before the contents are filled, the non-adhesive portion of the synthetic transverse seal portion corresponding to the lower end of the leading gusset bag-like bag portion is heat-sealed to the non-adhesive portion which was the passage portion of the pipe. After the filling of the contents, heat sealing is performed on the non-adhesive portion, which was the passage portion of the pipe, of the synthetic lateral seal portion corresponding to the upper end of the leading gusset bag-shaped bag portion. A sealing mechanism for sealing the gap of the non-adhered portion,
The synthetic transverse seal portion comprising a cutter disposed opposite to the tubular film, the top gusset bag-like bag portion being filled with the contents, and corresponding to the upper end of the gusset bag-like bag portion A separation mechanism for separating the gusset bag-shaped bag portion from the tubular film with the cutter after the gap between the non-adhered portions is sealed;
An apparatus for manufacturing a film packaging bag containing contents.   The gusset forming portion includes a folding sailor that folds the strip-shaped film portions corresponding to the folding portions on both the left and right sides of the gusset bag-shaped bag portion as the strip-shaped film is transported in the longitudinal direction by the film transport mechanism. The manufacturing apparatus of the film packaging bag with a content of Claim 8 or 9 provided. The folding sailor, as the left and right sides of the gusset bag-shaped bag portion when the contents into the gusset bag-shaped bag portion is filled, the front surface, and rear surface of the width is equal properly, The manufacturing apparatus of the film packaging bag with a content of Claim 10 which folds the part of the said strip | belt-shaped film corresponded to the folding part of the right and left both sides of the said gusset bag-shaped bag part in the said gusset molding part.   In the folding sailor, the belt-shaped film is folded so as to form the cylindrical film, and the both edges are aligned using the forming mechanism that aligns both lateral edges of the belt-shaped film. The strip-shaped film portion corresponding to the folded portions on both the left and right sides of the gusset bag-shaped bag portion is folded at the gusset molding portion so as to be positioned at one end portion in the lateral direction of the cylindrical film. An apparatus for producing a film packaging bag containing the contents according to 10 or 11.   13. The hem seal mechanism according to claim 8, further comprising a hem seal mechanism that forms a hem seal by heat-sealing at the corners of each mountain fold portion for forming a V-shaped fold on both left and right sides of the cylindrical film. The manufacturing apparatus of the film packaging bag containing the content of description.   The hem seal mechanism includes a plate inserted in a valley between mountain folds for forming a V-shaped fold on each of the left and right sides of the cylindrical film, and the plate in the valley between the mountain folds. The film containing contents according to claim 13, further comprising: a heater bar that is disposed opposite to each other between the left and right edges of the cylindrical film in the inserted state and that heats the corners of the mountain folds. Packaging bag manufacturing equipment.   The sealing seal mechanism has a horizontal heater bar and a horizontal heater receiving bar that are opposed to each other with the cylindrical film interposed therebetween, and the horizontal heater bar heats the non-bonded portion of the synthetic horizontal seal portion. A pressure block that pressurizes a portion other than the non-adhered portion of the synthetic horizontal seal portion, and the horizontal heater receiving bar is a heating receiving block that is a receiving portion of the heating block; The manufacturing apparatus of the film packaging bag containing the content of any one of Claims 8-14 which has a pressurization receiving block which is a receiving part of a pressurization block.   The said sealing seal mechanism is a manufacturing apparatus of the film packaging bag containing a content of any one of Claim 8 to 15 provided with the tension | pulling apparatus which pulls the right-and-left both edge part of the said cylindrical film to a horizontal direction outer side. The seal bars of the first and second horizontal sealing mechanisms are provided in a horizontal heat part extending in the horizontal direction of the cylindrical film and a pair of V-shaped provided respectively on the upper and lower sides of the horizontal heat part. The manufacturing apparatus of the film packaging bag containing a content of any one of Claims 8-16 which has an oblique heat part.

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