JP4495494B2 - Packaging bag manufacturing apparatus and manufacturing method - Google Patents

Description

  The present invention relates to a packaging bag manufacturing apparatus and manufacturing method for manufacturing a packaging bag using a belt-shaped film material.

  Some packaging bags, such as gusset bags, can be folded into the inside of the packaging bag by folding lines. For example, a flat bottom type gusset bag shown in FIG. 5, an inner bag for a bag-in-box stored in the box as shown in FIG. 6, and a straw cap as shown in FIG. A typical packaging bag is a pouch with a spout that is opened and closed. These packaging bags are provided with a pair of opposed plane portions and a pair of opposed side portions configured to connect the side edges of the plane portions. A fold line is formed at the center of the side surface portion, and the side surface portion can be folded toward the inside of the packaging bag by the fold line.

  Moreover, about the flat bottom type gusset bag shown in FIG. 5, when forming the bottom face part, there exist some which use the member which folded the rectangular-shaped film material into two folds.

  When manufacturing such a packaging bag, a belt-like flat film material configured as one of the flat portions is conveyed in the longitudinal direction, and a folding line is configured as a side surface portion or a bottom surface portion at predetermined intervals in the longitudinal direction. The member formed is arranged.

  Conventionally, the method shown in Patent Document 1 has been mainly employed for the step of forming a member with a fold line and the step of arranging a member with a fold line. In the technique disclosed in Patent Document 1, a member configured as a side surface portion is formed of a band-shaped film separate from the band-shaped flat film. The fold line is formed by folding both side portions of the belt-shaped film toward the center in the width direction. Thereafter, the folded belt-like film is cut into a dimension shorter than the width of the belt-like flat film with respect to its longitudinal direction, and these are cut halfway from the side of the belt-like flat film and placed at regular intervals in the longitudinal direction of the belt-like flat film. Was.

  On the other hand, as shown in FIG. 8 of Patent Document 1, for the bottom surface portion, in addition to the belt-shaped film configured as the flat surface portion, a belt-shaped film configured as the bottom surface portion is separately prepared. And the opening surface was formed in the side edge of the strip | belt-shaped film comprised as a plane part, the strip | belt-shaped film comprised as a bottom face part was sent out toward this opening surface, and both were bonded together in the longitudinal direction continuously .

JP 2000-254984 A

  However, since the method disclosed in Patent Document 1 forms a member having a fold line by cutting the belt-shaped film at predetermined lengths in the longitudinal direction, a considerable amount of time is required until each member is formed. Need length. For this reason, a wide space is required on the side of the belt-like flat film conveyed in the longitudinal direction.

  Further, when forming a member having a fold line, a certain amount of feeding time is required because the strip film cannot be cut unless it is fed by the length of each member having the fold line. For this reason, the time interval for placing the member having the fold line on the belt-like flat film is increased, which causes the overall bag making time to be increased.

  Furthermore, since it is a form which carries in the member which has a fold line from the side of a strip | belt-shaped flat film, it is comparatively difficult to align with respect to the width direction of a strip | belt-shaped flat film, and the position to mount may shift | deviate. .

  On the other hand, in forming the bottom surface, a belt-like bottom film is separately prepared and bonded continuously in the longitudinal direction of the belt-like flat film configured as a flat portion (see FIG. 8 of Patent Document 1). . Thus, when the process of laminating | stacking a strip | belt-shaped film continuously on the longitudinal direction is implemented, the error by the shift | offset | difference by both longitudinal directions will accumulate | store gradually. For packaging bags that must match the prints printed on both, this accumulated error is a quality issue that cannot be overlooked.

  Therefore, in the present invention, not only can the equipment be set to be compact, but also the manufacture of a packaging bag that can place a member with a fold line configured as a side surface portion or a bottom surface portion in a short time without causing displacement. An apparatus and a method for manufacturing a packaging bag are provided.

In the present invention, in order to solve the above-mentioned problem, a belt-like flat film transporting means for transporting a belt-like flat film configured as an opposing flat portion of the packaging bag in its longitudinal direction, and a center at the inside of the packaging bag by a fold line In an apparatus for manufacturing a packaging bag, comprising: a bi-fold member configured as a side surface portion or a bottom surface portion that can be folded toward the bi-fold member arrangement means for arranging the bi-fold member at regular intervals in the longitudinal direction of the belt-like flat film; Bi-fold member forming means for forming the bi-fold member from the second strip film fed from the film roll by the feed means is provided, and the bi-fold member forming means extends in the width direction with respect to the second strip film. A folding line forming means for sequentially forming the folding lines; and the second belt-like film disposed between the folding line forming means and the film roll. Cutting means for cutting in parallel with the fold line, and the fold line forming means is disposed on one side of the fed second belt-like film and extends in the width direction of the second belt-like film. A guide portion that constitutes an insertion slit, and a push plate that is disposed at a position corresponding to the insertion slit on the other surface side of the second belt-like film and reciprocates so as to be inserted into and removed from the insertion slit. The feeding means and the bi-fold member forming means are provided at a position corresponding to a predetermined position in the width direction in which the bi-fold member is arranged on the belt-like flat film with respect to the width direction of the belt-like flat film. The bi-fold member forming means is arranged at two places different in the conveying direction of the belt-like flat film, and the bi-fold member arranging means is folded in half. The two foldable member forming means are provided corresponding to the positions where the material forming means are arranged, and the two foldable member forming means are arranged so that the folding direction of the foldable member is opposite to the conveying direction. The second folded film is disposed with the second band-shaped film interposed therebetween so that the positions of the two folded films are opposite to each other with respect to the transport direction, and the folded member placing means faces the opened portions of the folded member facing each other. The packaging bag manufacturing apparatus in which the direction in which the fold lines of the two-fold members extend extends in the width direction of the belt-like flat film was employed.

  And in this invention, the manufacturing apparatus of the said packaging bag was provided with the point seal means which presses the said bifold member with respect to the said strip | belt-shaped flat film in which these are arrange | positioned, and seals it locally.

On the other hand, in the present invention, in order to solve the above-mentioned problem, a bi-fold member whose center is formed as a side surface portion or a bottom surface portion that can be folded toward the inside of the packaging bag by a fold line is conveyed in the longitudinal direction, and is flat. In the manufacturing method of the packaging bag provided with the process arrange | positioned for every fixed space | interval in the said longitudinal direction of the strip | belt-shaped flat film comprised as a part, the 2nd strip | belt-shaped film comprised as said bifold member is said strip | belt-plane The second belt-like film fed out toward the film is fed into a predetermined position on the film roll side from the tip, and is a flat push plate extending in the width direction of the second belt-like film from one side. To the inside of the insertion slit of the guide portion provided on the surface side and provided with the insertion slit extending in the width direction of the second strip-shaped film From the position where the fold line is formed by the corresponding length between the tip and the position where the fold line is formed when the push plate is pressed against the second belt-like film. The position on the film roll side is cut in the width direction to form the bi-fold member, and the second band-shaped film is arranged in the band-shaped plane film with respect to the width direction of the band-shaped plane film. Sending out at a position corresponding to a predetermined position in the width direction, the film roll of the second belt-like film is placed at two different places in the transport direction of the belt-like flat film, and the placement position of the guide portion and the push-in plate is Folding each bi-fold member by placing the second belt-like film in between so as to be opposite to each other in the transport direction Folding is performed so that the direction is opposite to the transport direction. First, the bi-fold member formed on the upstream side in the transport direction has its fold line aligned with the width direction of the belt-shaped flat film. The bi-fold member formed on the downstream side in the transport direction is disposed on the film, and the opened portion thereof is disposed on the upstream side so as to face the open portion of the bi-fold member. The manufacturing method of the packaging bag arrange | positioned by the said strip | belt-shaped plane film was employ | adopted.

  And in this invention, about the manufacturing method of the said packaging bag, every time the said bifold member is arrange | positioned at the said strip | belt-shaped plane film, the point seal process of sealing the said bifold member locally with respect to the said strip | belt-shaped plane film sequentially It is characterized by having.

  According to the present invention, first, since it is not necessary to provide a large unit for forming a bi-fold member on the side of the belt-like flat film to be conveyed, the manufacturing apparatus can be configured compactly.

  Secondly, in forming the bi-folded member, the dimension corresponding to the width of the individual bi-folded member is different from the conventional method in which the band-shaped film is fed and cut by the size corresponding to the length of the individual bi-folded member. Since it is only necessary to feed the belt-shaped film as much as possible, each of the two folded members can be formed in a short time. For this reason, the manufacturing time of the whole packaging bag is shortened.

  Thirdly, the individual bi-fold members can be accurately arranged without causing a shift in a preset position with respect to the width direction of the belt-like flat film. For this reason, a packaging bag of good quality can be formed.

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

  First, with reference to FIGS. 5-7, the aspect of the packaging bag which the manufacturing apparatus and manufacturing method of a packaging bag mainly make object is demonstrated.

  The packaging bag shown in FIG. 5 includes a bag main body portion 40a including a pair of opposed flat surface portions 41 and a pair of opposed side surface portions 42 connecting the side surfaces of the flat surface portions 41. This is a flat bottom type gusset bag 40 in which one opening portion of 40 a is closed by a rectangular bottom surface portion 44.

  The flat portion 41 of the gusset bag 40 is formed of a flat film material, while the side surface portion 42 is formed with a fold line 43 extending vertically in the center in the thickness direction of the gusset bag. The fold line 43 formed on the side surface portion 42 can be folded toward the inside of the gusset bag 40 by the fold line 43.

  The packaging bag shown in FIG. 6 is a so-called bag-in-box inner bag 50 housed inside the box. The inner bag 50 includes a pair of opposed flat portions 51 and a pair of side portions 52 that are interposed between the flat portions 51 and connect the side edges of the flat portions 51. The inner bag 50 forms a bag body 50 a having both ends opened by the flat surface portion 51 and the side surface portion 52, and the edge of the flat surface portion 51 and the edge of the side surface portion 52 are mutually connected with respect to each of the opened end portions. The opening is sealed by bonding together. One flat surface portion 51 is provided with a spout 54 so that the contents can be poured out from the spout 54 after being accommodated in a box (not shown).

  Also for this inner bag, the side portion 52 is formed with a folding line 53 extending vertically in the center in the thickness direction of the inner bag 50, and the side portion 52 is configured to be foldable inward of the inner bag 50. Yes.

  The packaging bag shown in FIG. 7 is a pouch 60 with a spout on which a spout 64 for pouring the contents is attached. The pouch 60 with a spout is also composed of a pair of opposing flat portions 61 and a side portion 62 that is interposed between the flat portions 61 and connects the side edges of the flat portions 61. The bottom portion is attached by sealing the edge of the flat surface portion 61 and the edge of the side surface portion 62 to each other, while the upper portion is attached so that the spout 64 is sandwiched by the flat surface portion 61 at the center in the width direction. ing.

  The side part 62 of the pouch 60 with a spout is also formed with a folding line 63 extending vertically in the center in the width direction of the bag, and the side part 62 is configured to be foldable inward of the bag by the folding line 63. .

  In this embodiment, such a packaging bag is formed with the manufacturing apparatus and manufacturing method which are demonstrated below.

  FIG. 1 shows a packaging bag manufacturing apparatus according to an embodiment of the present invention. This manufacturing apparatus is provided with two transport paths A and B through which the belt-like flat film 1 configured as a flat portion is transported in the longitudinal direction. These conveyance paths A and B are arranged so that the belt-like flat film 1 faces up and down. Each of the transport paths A and B is appropriately provided with a transport roller 10 as a transport means for transporting the belt-like flat film 1 in the longitudinal direction. These transport rollers 10 transport the belt-like flat film 1 intermittently.

  The upper conveyance path A conveys the belt-like flat film 1 so as to draw a large U-shape that is convex upward. On the other hand, the lower conveyance path B conveys the belt-like flat film 1 in the longitudinal direction so as to draw a small U-shape so as to protrude upward on the lower side of the upper conveyance path A. Note that the belt-like flat film 1 transported by the upper transport path A and the belt-shaped flat film 1 transported by the lower transport path B are both transported from right to left in FIG.

  In a space formed between the upper conveyance path A and the lower conveyance path B, a bi-fold member forming device 20 that forms a bi-fold member 5 configured as a side surface portion of the gusset bag is provided. The two-fold member forming device 20 is provided in two places in the transport direction of the belt-like flat film 1, and one of the two folded member forming devices 20 is horizontally transported in the lower transport path B and the portion B 1 where the belt-like flat film 1 rises. The other is provided at the boundary between the portion B2 and the other at the boundary between the portion B2 where the belt-like flat film 1 is conveyed horizontally and the portion B3 descending thereafter.

  Further, the packaging bag manufacturing apparatus is provided with a point seal device 30 for locally sealing the bi-folded member 5 with respect to the band-shaped flat film 1 after the bi-folded member 5 is arranged on the band-shaped flat film 1. .

  The two-fold member forming device 20 has a film roll 3 in which a second belt-like film 2 separate from the belt-like flat film 1 is wound in a roll shape, and a feeding device 21 composed of a plurality of rollers 22 is a film roll 3. The second belt-like film 2 is sent out toward the lower conveyance path B. Further, the two-fold member forming apparatus 20 includes a fold line forming unit 23 that sequentially forms fold lines 6 extending in the width direction of the second belt-like film 2, and a fold line forming unit 23 and a film roll 3. And a cutting cutter 26 that cuts the second belt-like film 2 in parallel with the fold line 6 formed thereon.

  The film roll 3 and the two-fold member forming device 20 are provided at positions that occupy a predetermined range in the center of the belt-like flat film 1 with respect to the width direction of the belt-like flat film 1 being conveyed through the lower conveyance path B.

  As shown in detail in FIG. 2, the fold line forming unit 23 is disposed on the one surface side of the second belt-like film 2 and on the other surface side of the second belt-like film 2. It is comprised from the pushing part 25 which inserts the 2nd strip | belt-shaped film 2 toward. The guide part 24 is arranged in parallel with the horizontal direction, with two block members 24a and 24a arranged vertically. A gap formed between the block members 24 a and 24 a is an insertion slit 24 b into which the second strip film 2 is inserted, and extends in the width direction of the second strip film 2. On the other hand, the push-in part 25 is provided at a position facing the guide part 24 with the second belt-like film 2 interposed therebetween. The pushing portion 25 is composed of a horizontally extending plate-like pushing plate 25a whose front end is directed to the second belt-like film 2, and a holder 25b that holds the rear portion of the pushing plate 25a. The pushing portion 25 is configured to reciprocate back and forth, and the pushing plate 25a is inserted into and removed from the insertion slit 24b of the guide portion 24 so that the second strip film 2 is inserted into the insertion slit 24b.

  The cutting cutter 26 is provided between the film roll 3 and the fold line forming unit 23 and slightly above the fold line forming unit 23, and sequentially cuts the second belt-like film 2 into a predetermined length. To do. The cutting cutter 26 is a cutter blade 27 provided on the same side as the push-in portion 25 with respect to the second strip-shaped film 2, and a contact block 28 that is disposed on the same side as the guide portion 24 and abuts the tip of the cutter blade 27. It consists of and.

  The two-fold member forming apparatus 20 configured as described above forms the two-fold member 5 from the second belt-like film 2 fed out from the film roll 3 in the procedure shown in FIG.

  First, as shown in FIG. 3A, the dimension between the leading end 2a of the second belt-like film and the position corresponding to the leading end of the pushing plate 25a constituting the pushing portion 25 is a double-folded member to be formed. The second belt-like film 2 is fed out from the film roll 3 until it matches the width of the folded state of 5.

  Next, the push-in portion 25 is advanced toward the fed-out second belt-like film 2, abuts against the second belt-like member at the tip of the push-in plate 25 a, and the second belt-like film faces the inserted slit 24 b of the guide portion 24. 2 is inserted. The position where the tip of the push-in plate 25 a is abutted is later formed as the fold line 6 of the bi-fold member 5.

  Thereafter, as shown in FIG. 3 (b), when the pushing plate 25a is inserted into the inserted slit 24b and the second strip film 2 is bent, the fold line of the second strip film 2 is cut by the cutting cutter 26. A position slightly above the forming unit 23 is cut. In this apparatus, the cutting cutter 26 is controlled to cut a position having the same dimension as the dimension up to the leading end 2a of the second strip-shaped film 2 with a position corresponding to the leading end of the pushing plate 25a as a boundary. Thus, the formed bi-fold member 5 is formed so that the dimension in the width direction is the target with the fold line 6 as a boundary.

  After the cutting, as shown in FIG. 3C, the pushing plate 25a is further inserted into the insertion slit 24b. Thereby, the cut | disconnected 2nd strip | belt-shaped film 2 is restrained by the guide part 24 and the pushing-in part 25, and is folded in two by the aspect which pinches | interposes the pushing-in plate 25a between them, and the bi-fold member 5 is formed.

  Thereafter, as shown in FIG. 3D, the pushing plate 25 a is further advanced, and the half-folded member 5 is completely exposed from the opening on the opposite side of the guide portion 24. Then, the bi-fold member 5 is arranged on the belt-like flat film 1 by a bi-fold member arrangement device (not shown). The fold member 5 has a fold line 6 formed at the center thereof aligned with the width direction of the belt-like flat film 1, and is disposed substantially at the center which is a preset position in the width direction of the belt-like flat film 1. .

  The component parts constituting the two-fold member forming device 20 provided at these two positions are the upstream one and the downstream one in the second belt-like film 2 in the transport direction of the belt-like flat film 1. The arrangement relationship with the border is the opposite side. In the upstream fold line forming unit 23, the cutter blade 27 and the push-in portion 25 are disposed on the upstream side of the second belt-shaped film 2, while the contact block 28 and the guide portion 24 are disposed on the downstream side. On the other hand, in the fold line forming unit 23 provided on the downstream side, the cutter blade 27 and the pushing portion 25 are arranged on the downstream side of the second belt-like film 2, while the contact block 28 and the guide portion 24 are on the upstream side. It is arranged on the side. For this reason, the formed bi-fold member 5 is smoothly arrange | positioned in the part B2 which is conveying the strip | belt-shaped plane film 1 horizontally which is the top part of the path | route formed in convex shape.

  As described above, the film roll 3, the fold line forming unit 23, the cutting cutter 26, and the formed bi-fold member 5, which are the raw materials of the bi-fold member 5, are arranged on the belt-like flat film 1. The apparatus (not shown) is installed at a site set in advance in the width direction of the belt-like flat film 1 transported through the lower transport path B. That is, the formed bi-fold member 5 is arranged in a predetermined region in the center in the width direction so that a certain remaining section is formed on both sides in the width direction of the belt-like flat film 1. And these apparatuses are arrange | positioned so as to correspond to the area | region where the bifold member 5 is arrange | positioned. For this reason, the bi-fold member 5 can be accurately arranged at a desired position without performing special positioning at the time of arrangement.

  In addition, arrangement | positioning to the strip | belt-shaped planar film 1 of the bifold member 5 and the local seal | sticker demonstrated below are performed in a series of processes. During this process, the belt-like flat film 1 is temporarily stopped from being conveyed.

  On the other hand, the point seal device 30 included in the packaging bag manufacturing apparatus is provided at two locations, a front portion and a rear portion of a portion where the belt-like flat film 1 is conveyed horizontally. The point seal device 30 provided at the front part seals the half-folded member 5 formed by the upstream half-fold member forming apparatus 20, and the point seal device 30 provided at the rear part is disposed downstream. The bi-fold member 5 formed by the provided bi-fold member forming apparatus 20 is sealed.

  Each point seal device 30 includes a seal bar 31 disposed above the lower conveyance path B. The seal bar 31 is configured to reciprocate up and down above the lower conveyance path B. When the seal bar 31 is lowered, the lower end presses the folded member 5 toward the belt-like flat film 1. In this point seal device 30, two seal bars 31 are arranged in parallel at positions corresponding to both ends of the bi-fold member 5 in the width direction of the belt-like flat film 1, and the longitudinal direction of the bi-fold member 5 The both ends of are sealed locally.

  At this time, the seal bar 31 presses the folded member 5 from the folded upper surface to seal the lower surface of the folded member 5 and the upper surface of the belt-like flat film 1. Note that a heat-resistant non-fused layer is formed on the inner surface of the folded member 5 so that the inner surfaces are fused even when the folded member 5 is heated by the seal bar 31. Absent.

  In the packaging bag manufacturing apparatus having the above configuration, the arrangement and sealing of the bi-fold members 5 are repeated in the procedure shown in FIG.

  First, the folded member 5 formed by the upstream folded member forming apparatus 20 is disposed in the central region in the width direction of the belt-like flat film 1 (S1). At this time, the fold line 6 of the bi-fold member 5 is directed downstream. Next, both ends in the longitudinal direction of the bi-fold member 5 are locally sealed to the belt-like film (S2). Until this step is completed, the conveyance of the belt-like flat film 1 is temporarily stopped. And the conveyance of the strip | belt-shaped plane film 1 is restarted, and the bi-folding member 5 arrange | positioned upstream is conveyed to the position in which the bi-fold member forming apparatus 20 of the downstream was provided. Thereafter, the conveyance of the belt-like flat film 1 is temporarily stopped again.

  After the conveyance is stopped, the half-folded member 5 formed by the half-folded member forming apparatus 20 on the downstream side is arranged on the belt-like flat film 1 (S3). The folding member 5 arranged on the downstream side has the folding line 6 directed toward the upstream side, the opening side of the folding member 5 already arranged on the upstream side, and the folding member arranged on the downstream side. 5 are arranged back to back so that the opening sides of the 5 face each other. Thereafter, both end portions in the longitudinal direction of the bi-fold member 5 arranged on the downstream side are locally sealed (S4).

  In addition, as a method of locally sealing the inner surface of the tri-fold member in FIG. 12, in addition to the method by heat sealing, a method by hot melt, part coat, or tape (which may be either adhesive type or heat sealing type) You may seal locally. Such local sealing by hot melt, part coating, or the like is performed to prevent the inner surfaces of the tri-fold members from turning over. For this reason, after the tri-fold member is completely sealed with the belt-like flat film, the portion of the local seal is cut off.

  After such a process, the belt-like flat film 1 that has been transported through the upper transport path A is transported through the lower transport path B and is superimposed on the belt-shaped flat film 1 on which the bi-fold member 5 is disposed. Thereafter, each belt-like flat film 1 and the bi-fold member 5 are sealed together to form a row of bag body portions. And by cutting the boundary part of bag main-body parts, while the strip | belt-shaped flat film 1 is comprised as a plane part of a packaging bag, the bi-fold member 5 is comprised as a side part. As described above, various packaging bags shown in FIGS. 5 to 7 are formed by using the bag body portion formed in this way. In addition, the two-fold member 5 formed by this manufacturing apparatus and manufacturing method has the side part 42 of the gusset bag 40 shown in FIG. 5, the side part 52 of the inner bag 50 shown in FIG. 6, or the spout shown in FIG. The pouch 60 is configured as a side portion 62. Moreover, the fold line 6 comprises the fold lines 43, 53, and 63 of the side surface parts 42, 52, and 62 of each packaging bag shown in FIGS.

  The case where the bi-fold member is configured as the side surface portion of the packaging bag has been described above as an example, but the present invention is not limited to this. For example, when manufacturing a flat bottom type gusset bag or a standing pouch, the bi-fold member can also be used as the bottom portion of the packaging bag.

  8 to 11 show an embodiment for manufacturing the standing pouch 100.

  In this embodiment, a plurality of standing pouches 100 are formed in the width direction of the belt-like flat film 70, which is a so-called multiple manufacturing method. The manufacturing apparatus shown in FIG. 8 also includes two transport paths C and D through which the belt-like planar film 70 is transported in the longitudinal direction. These transport paths C and D are appropriately provided with transport rollers 74 as transport means for transporting the strip-shaped flat film 70 in the longitudinal direction with the strip-shaped flat film 70 facing up and down. These transport rollers 74 intermittently transport the belt-like flat film 70. Moreover, the upper conveyance path C and the lower conveyance path D are carrying the strip | belt-shaped plane film 70 so that all may become convex shape toward upper direction.

  In this manufacturing apparatus, one folded member forming device 80 that forms the folded member 75 is provided in a space formed between the upper conveyance path C and the lower conveyance path D. The position where the half-folded member forming device 80 is provided is a boundary portion between the portion D1 where the belt-like flat film 70 ascends and the portion D2 conveyed horizontally thereafter in the lower conveyance path D. This manufacturing apparatus also includes a point seal device 90 that locally seals the folded member 75 disposed on the belt-like flat film 70 with respect to the belt-like flat film 70.

  The two-fold member forming device 80 has a film roll 72 in which a second belt-like film 71 separate from the belt-like flat film 70 is wound in a roll shape, and a feeding device 81 composed of a plurality of rollers 82 is a film roll 72. The second belt-like film 71 is sent out toward the lower conveyance path D. Further, the two-fold member forming device 80 includes a fold line forming unit 83 that sequentially forms a fold line 76 extending in the width direction with respect to the second belt-like film 71, and between the fold line forming unit 83 and the film roll 72. And a cutting cutter 86 that cuts the second belt-like film 71 in parallel with the fold line 76.

  The width of the second belt-like film 71 is formed to be the same as the width of the belt-like flat film 70, and the position at which the film roll is disposed is the position in the width direction of the belt-like flat film 70 being conveyed through the lower conveyance path D. Is consistent with. Accordingly, the folding line forming unit 83 is also arranged at a position that coincides with the width direction of the belt-like flat film 70.

  The fold line forming unit 83 has a block member 84a arranged vertically, a guide portion 84 between which the inserted slit 84b is formed, and a push for pushing the second belt-like film 71 toward the inserted slit 84b. Part 85. In this fold line forming unit 83, the guide portion 84 is arranged on the downstream side in the transport direction of the belt-like flat film 70 with respect to the second belt-like film 71 to be suspended, while the push-in portion 85 The belt-like film 71 is disposed on the upstream side in the transport direction of the belt-like flat film 70.

  Moreover, the cutting cutter 86 is provided between the film roll 72 and the fold line forming unit 83, and sequentially cuts the second strip film 71 into a predetermined length. The cutting cutter 86 also includes a cutter blade 87 provided on the same side as the pushing portion with respect to the second belt-like film 71 and a contact block 88 disposed on the same side as the guide portion 84.

  According to the half-folded member forming apparatus 80 having the above configuration, the half-folded member 75 is arranged on the belt-like flat film 70 by the same procedure as that shown in FIG. The arranged bi-fold member 75 is later configured as a bottom surface portion of the standing pouch 100. In this embodiment, all the two-fold members 75 arranged on the belt-like flat film 70 are arranged with the fold line 76 facing the downstream side.

  After the folding member 75 is arranged on the belt-like flat film 70 conveyed on the lower conveying path D, the belt-like flat film 70 conveyed on the upper conveying path C conveys the lower conveying path D, and the folding member 75 is disposed. These are overlapped on the belt-like flat film 70 and sealed to each other.

  Here, when the manufacturing apparatus shown in FIG. 8 is used and the case where the bottom part is formed by the conventional manufacturing method shown in FIG. 9, there is the following difference.

  In the conventional manufacturing method shown in FIG. 9, a belt-like film 110 serving as a flat portion and a belt-like film 111 serving as a bottom surface are continuously bonded in the longitudinal direction. For this reason, when a deviation δ occurs in the longitudinal direction, dimensional errors due to the deviation δ are gradually accumulated as the mutual bonding progresses. Even if the dimensional error caused by the deviation δ for one standing pouch is very small, it cannot be overlooked if this dimensional error is accumulated.

  For example, it is assumed that a pattern is printed on a strip-shaped film 110 configured as a flat portion and a strip-shaped film 111 configured as a bottom portion, and these must be matched with each other. If the dimensional error due to the deviation δ in the longitudinal direction of both of them is accumulated, the symbols of the two do not match at all, and the standing pouch having the planned quality cannot be obtained.

  On the other hand, in the manufacturing apparatus according to the present embodiment, the bi-fold member 75 is provided to the belt-like flat film 70 discontinuously and independently for each standing pouch 100. For this reason, even if a slight dimensional error exists for one bifold member 75, the dimensional error is limited to the standing pouch 100 and is not accumulated. Therefore, it is possible to obtain the standing pouch 100 having a predetermined quality.

  FIG. 10 shows a state in which the belt-like flat film 70 transported through the lower transport path D, the bi-fold member 75 disposed on the upper surface thereof, and the belt-shaped flat film 70 transported through the upper transport path C are sealed to each other. . As shown in FIG. 10, these are formed such that the heat seal portion 78 extends in the longitudinal direction of the belt-like flat film 70 so as to divide the belt-like flat film 70 into five equal parts in the width direction. The heat seal portion 78 is a portion that will later form a side edge of the standing pouch 100, and the two flat belt films 70 and the bi-fold member 75 are completely fused together so that there is no gap.

  Moreover, each strip | belt-shaped flat film 70 and the bi-fold member 75 are bonded together by the heat seal part 79 formed so that it may notch in the semicircle formed so that it might continue in the width direction. In the heat seal portion 79, the bi-fold member 75 is heat-sealed only with the belt-like flat film 70 whose surfaces facing the belt-like flat films 70 are opposed to each other.

  After the heat seal portion 79 is formed so that the heat seal portion 78 extending in the longitudinal direction of the belt-like flat film 70 and the semi-circular unsealed portion are provided, the heat-sealed belt-like flat film 70 of the bi-fold member 75 is The line L1 is cut so as to be separated in the width direction at the position of the line L1, and is cut so as to be separated in the longitudinal direction by the lines L2 and L3 positioned before and after the end edge of the bi-fold member 75. And the line film between line L3 is discarded. Each cut piece is a standing pouch 100 with an open top.

  In this embodiment, the standing pouch is formed so as to be five in the width direction of the belt-like flat film 70, but is not limited thereto. The number of standing pouches formed in the width direction may be appropriately determined according to the width of the belt-like flat film 70 to be used and the required production amount.

  FIG. 11 is a perspective view of a standing pouch 100 filled with contents. As shown in FIG. 11, the completed standing pouch 100 is composed of a pair of opposing flat surface portions 101 and a flat bottom surface portion 102. The flat surface portion 101 is formed in a vertically long rectangle, and its upper edge and side edges are heat sealed to each other. On the other hand, the bottom surface portion 102 has a peripheral edge bonded to the lower edge of each planar portion, and is formed in an approximately elliptical shape.

  The flat surface portion 101 is composed of the belt-shaped flat film 70 described above, and the bottom surface portion 102 is composed of a bi-fold member 75. The seal portion 103 formed on both side edges of the standing pouch 100 is composed of the heat seal portion 78 extending in the longitudinal direction of the belt-like flat film 70 described above, and the seal portion 104 between the flat portion 101 and the bottom portion 102. Is formed by a heat seal part 79 having a semicircular cutout.

  In the standing pouch 100, the bottom surface portion 102 is formed flat, and stable self-supporting property is ensured by the cooperation of the seal portion 104 between the bottom surface portion 102 and the flat surface portion 101.

  In this embodiment, the manufacture of the bottom surface portion has been described by taking the standard standing pouch 100 as an example. However, the present invention is not limited to this and can be applied to a gusset type flat bottom shown in FIG.

  As described above, the case where the bi-fold member is placed on the belt-like flat film and the bi-fold member is configured as the side surface portion or the bottom surface portion of the packaging bag has been described as an example. However, as shown in FIGS. You may use the trifold member which turned up both the sides toward the center.

  FIG. 12 shows a state in which tri-fold members 120 are arranged at predetermined intervals in the longitudinal direction of the belt-like flat film 110 on the upper surface of the belt-like flat film 110 conveyed in the longitudinal direction. The tri-fold member 120 is formed by folding back both sides in the width direction toward the center thereof. In this embodiment, both sides are folded back so that a slight gap ε is formed between the original side edges 122 of the tri-fold member 120. The three-fold member 120 folded in this way has its axial direction aligned with the width direction of the belt-like flat film 110 so that the fold line 121 is directed to the upstream side and the downstream side in the transport direction of the belt-like flat film 110. The

  FIG. 13 shows the process of configuring the tri-fold member 120 as the bottom of the standing pouch. FIG. 13 shows a state in which the pair of belt-like planar films 110 and the tri-fold member 120 are heat-sealed after the tri-fold members 120 are sandwiched between the pair of belt-like flat films 110. The belt-like flat film 110 is formed so that the heat seal portions 111 extend in the longitudinal direction of the belt-like flat film 110 at four places in the middle portion in the width direction so that the width direction is equally divided into five. Further, both side edges of the belt-like flat film 110 are sealed with each other by the heat seal portion 112.

  On the other hand, at the position where the tri-fold member 120 is disposed, the heat seal portion 113 is formed such that a semicircular unsealed portion is provided between the heat seal portion 111 and the heat seal portion 112. The heat-sealed portion 113 is heat-sealed at both folded portions of the tri-fold member 120 so that a pair is formed in the longitudinal direction of the belt-like flat film 110.

  Thereafter, the belt-like planar film 110 and the tri-fold member 120 are cut so as to be equally divided into five in the width direction at the position of the heat seal portion 111, and a gap is formed at a position between the original side edges 122 of the tri-fold member. And is cut so as to be separated in the longitudinal direction.

  In addition, you may manufacture a packaging bag so that the said trifold member may be comprised as a side part of a gusset bag.

The structure figure which shows the whole structure of the manufacturing apparatus of the packaging bag of this invention. The perspective view which shows the fold line formation unit which comprises the manufacturing apparatus of the packaging bag shown in FIG. The figure which shows the procedure which forms a bifold member using a fold line formation unit and a cutting cutter. The figure which shows the procedure which arrange | positions a half-fold member in a strip | belt-shaped plane film. The perspective view of the flat bottom type gusset bag which is an example of the packaging bag manufactured with the manufacturing apparatus and manufacturing method of the packaging bag of this invention. The perspective view of the inner bag for bag in boxes which is another manufacture example. The perspective view of the pouch with a spout which is another manufacture example. The structure figure of the manufacturing apparatus concerning another embodiment different from the manufacturing apparatus of the packaging bag of FIG. Explanatory drawing which shows an example of the conventional manufacturing method. The top view which shows the state by which the strip | belt-shaped planar film and the bi-fold member were heat-sealed mutually. The perspective view of the completed standing pouch. The perspective view of the strip | belt-shaped flat film in which the tri-fold member was mounted which shows the one aspect | mode which mounts a tri-fold member in a strip | belt-shaped flat film, and manufactures a standing pouch. The figure which shows the process of manufacturing by making the bottom part of a standing pouch face each other.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,70 Strip | belt-shaped flat film 2,71 2nd strip | belt-shaped film 3,72 Film roll 5,75 Folding member 6,76 Folding line 20,80 Folding member forming apparatus 23,83 Folding line formation unit 24,84 Guide part 24b , 84b Inserted slit 25, 85 Push-in part 25a Push-in plate 26, 86 Cutting cutter 30, 90 Point seal device A, B, C, D Conveying path 110 Strip flat film 120 Tri-fold member

Claims (4)

A belt-like flat film transporting means for transporting a belt-like flat film configured as a flat portion facing the packaging bag in the longitudinal direction;
Bi-fold member disposing means for disposing a bi-fold member having a center as a side surface or a bottom surface portion that can be folded inward of the packaging bag by a fold line at regular intervals in the longitudinal direction of the belt-like flat film In the manufacturing apparatus of the packaging bag provided with
A bi-fold member forming means for forming the bi-fold member from the second belt-like film fed from the film roll by the feed means;
The fold member forming means is disposed between the fold line forming means and the film roll, the fold line forming means for sequentially forming the fold line extending in the width direction with respect to the second strip film, A cutting means for cutting the second strip film in parallel with the fold line,
Moreover, the fold line forming means is disposed on one side of the fed second belt-like film, and includes a guide portion that constitutes an insertion slit extending in the width direction of the second belt-like film, and the second belt-like film. On the other side, it is arranged at a position corresponding to the front insertion slit, and is constituted by a pushing plate that reciprocates so as to be inserted and removed from the insertion slit ,
The feeding means and the bi-fold member forming means are provided at a position corresponding to a predetermined position in the width direction in which the bi-fold member is arranged on the belt-like flat film with respect to the width direction of the belt-like flat film,
The bi-fold member forming means is disposed at two different locations in the transport direction of the belt-like planar film, and the bi-fold member arranging means is provided corresponding to the position where each bi-fold member forming means is disposed,
The two foldable member forming means are arranged so that the arrangement position of the guide portion and the pushing plate is opposite to each other with respect to the transport direction so that the folding direction of the foldable member is opposite to the transport direction. Placing the second strip film in between,
The bi-fold member disposing means is arranged such that the opened portions of the bi-fold member face each other and the extending direction of the fold line of these bi-fold members is aligned with the width direction of the belt-like flat film. A device for manufacturing a packaging bag. 2. The packaging bag manufacturing apparatus according to claim 1 , further comprising a point seal unit that presses the two-folded member against the belt-like flat film on which the two-folded member is disposed to seal locally . In the longitudinal direction of the belt-like flat film which is transported in the longitudinal direction and is configured as a flat surface portion, a bi-fold member configured as a side surface portion or a bottom surface portion that can be folded inward toward the inside of the packaging bag by a fold line In the manufacturing method of the packaging bag provided with the process of arranging at regular intervals,
Sending the second belt-shaped film configured as the two-fold member from the film roll toward the belt-shaped flat film,
The second belt-like film fed out is provided on the other surface side by a flat plate-like pushing plate extending in the width direction of the second belt-like film from the one surface side at a predetermined position on the film roll side from the tip. Pushing toward the inside of the insertion slit of the guide portion provided with the insertion slit extending in the width direction of the second strip film,
Next, with respect to the second belt-like film, the film is formed from the position where the fold line is formed by the length corresponding to the distance between the tip and the position where the push plate is pressed to form the fold line. Cut the roll side position in the width direction to form the bi-fold member,
The second belt-like film is sent out at a position corresponding to a predetermined position in the width direction in which the bi-fold member is to be arranged in the belt-like flat film with respect to the width direction of the belt-like flat film,
The film rolls of the second belt-like film are arranged at two places where the transport direction of the belt-like flat film is different, and the second position is such that the placement position of the guide portion and the pushing plate is opposite to each other with respect to the transport direction. Folded so that the folding direction of each half-folded member is opposite to the conveying direction, with the band-shaped film placed between them,
First, the bi-fold member formed on the upstream side in the transport direction is arranged on the belt-like flat film so that the fold line coincides with the width direction of the belt-like flat film,
Next, the half-folded member formed on the downstream side in the transport direction is arranged in the belt-like plane so that the opened portion is opposed to the opened portion of the half-folded member disposed on the upstream side. A method for producing a packaging bag, which is arranged on a film . Every time the clamshell members is disposed in the strip-like planar film, wherein said clamshell members to claim 3, characterized in that with a point seal step of sequentially seal locally with respect to the elongated flat film Manufacturing method for packaging bags.

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