JP5890143B2 - Packaging bag manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a packaging bag formed in a bag shape from a resin sheet.

  Conventionally, a gusset-type packaging bag formed in a bag shape from a resin sheet is known. For example, as shown in FIG. 13, in the packaging bag of patent document 1, the front sheet part 101 and the back sheet part 102 are arrange | positioned so that the surface which has heat welding property may mutually face. In addition, the pair of folding sheet portions 103 are folded in a double-folded state so that the heat-welding surface is on the outer side (mountain side), and the left and right side edges of the front sheet portion 101 and the rear sheet portion 102 Are arranged such that the crease faces the center of the front sheet portion 101 in the width direction.

  A bottom edge adhesive portion 104 is formed on the bottom edge of the packaging bag by heat welding with the folded sheet portion 103 sandwiched between the front sheet portion 101 and the back sheet portion 102. The bottom edge bonding portion 104 has a double structure of the front sheet portion 101 and the back sheet portion 102 at the center in the left-right direction of the packaging bag, and the left and right sides are the front sheet portion 101, the back sheet portion 102, and the folded state. The folding sheet portion 103 has a quadruple structure.

  As shown in FIG. 13, four side edge adhesive portions 105 extending in the vertical direction are formed in the packaging bag. One of the side edge bonding portions 105 on the front sheet portion 101 side is to bond one side edge of the front sheet portion 101 and the side edge of the folded sheet portion 103 disposed to face the side edge. The other is formed by adhering the other side edge of the front sheet portion 101 and the side edge of the folded sheet portion 103 disposed to face the side edge. Further, side edge adhesive portions 105 are formed in the same manner on both side edges of the back sheet portion 102. An upper edge adhesive portion 106 is formed on the upper edge of the packaging bag by heat welding in a state where the folded sheet portion 103 is sandwiched between the front sheet portion 101 and the rear sheet portion 102. Similar to the bottom edge bonding portion 104 described above, the upper edge bonding portion 106 has a double structure of the front sheet portion 101 and the rear sheet portion 102 in the center in the left-right direction of the packaging bag, and the left and right sides are front sheets. It has a quadruple structure of the part 101, the back sheet part 102, and the folded sheet part 103 in a folded state.

  As shown in FIG. 13 and FIG. 14, in the state in which the contents are filled in the packaging bag, the folded sheet portion 103 that has been folded in a double-folded state spreads and the packaging bag has a thickness in the front-rear direction. . Along with this, each sheet constituting the packaging bag is bent along a fold line L extending in the width direction at a position spaced apart from the bottom edge adhesive portion 104 by a predetermined length to form the bottom surface portion 100. When the packaging bag configured as described above is self-supported, the bottom edge bonding portion 104 is folded back to the front sheet portion 101 side or the back sheet portion 102 side (the front sheet portion 101 side in FIG. 14), and the bottom edge bonding is performed. The bottom surface portion 100 including the portion 104 contacts the placement surface.

Japanese Patent Laid-Open No. 8-282682.

  As shown in FIG. 14, in the packaging bag of patent document 1, the bottom edge adhesion | attachment part 104 is return | folded by the front sheet | seat part 101 side. Therefore, the contact surface of the bottom surface portion 100 that contacts the placement surface includes the outer surface of the bottom edge bonding portion 104 disposed at the center, the outer surface of the lower portion 101a of the front sheet portion 101, and the outer surface of the lower portion 102a of the rear sheet portion 102. Will be composed of three outer surfaces. In particular, the bottom edge bonding portion 104 is bonded and bent in the most multilayer, and the bottom edge bonding portion 104 is present at the center of the bottom surface portion 100, so that the self-supporting stability of the packaging bag may be impaired. is there.

  For example, as shown in FIG. 14, when the packaging bag is made to stand on its own, it is the outer surface of the bottom edge adhesive portion 104 and the outer surface of the lower portion 102a of the back sheet portion 102 that comes into contact with the mounting surface. A gap G may be generated without contacting the outer surface of the lower part 101a of 101 and the mounting surface. The gap G has an appropriate rigidity so that the bottom edge bonding portion 104 has a double structure or a quadruple structure as described above, and the folded bottom edge bonding portion 104 has a lower portion 101a of the front sheet portion 101. It is caused by trying to get up to be separated from the outer surface. In such a self-supporting mode, it is difficult to configure the outer surface of the lower portion 101a of the front sheet portion 101 as a contact surface that comes into contact with the placement surface, and the actual contact surface must be made smaller. Therefore, the outer surface of the lower portion 101a of the front sheet portion 101 does not contribute to the self-supporting stability of the packaging bag, and the self-supporting stability of the packaging bag cannot be sufficiently ensured.

  The present invention has been made in view of such circumstances of the prior art, and an object of the present invention is to provide a packaging bag manufacturing apparatus capable of manufacturing a packaging bag with improved self-supporting stability.

In order to achieve the above object, the invention according to claim 1 is formed of a cylindrical resin sheet, and a lower edge of the resin sheet is bonded to form a folded adhesive portion. When it is in a bag state in which an accommodation space is formed apart from each other, the lower part of the resin sheet is folded and the folded adhesive part is folded back to one side of the resin sheet that is arranged to face the bottom part. A packaging bag manufacturing apparatus for manufacturing a packaging bag in which the tip of the folded adhesive portion is in contact with the edge of the lower outer surface on one side of the resin sheet in the bottom surface portion, wherein the resin sheet is in the bag state. after being, the fold-back bonding portion and the guide member bring occur in the direction away from the lower outer surface on one side of the resin sheet, the fold-back bonding portion raised happened by the guide member An adhesive layer applying member provided with a sealable layer, the adhesive layer and the fold-back bonding portion provided, along with the folded back to one side of the resin sheet to be opposed to該折return adhesion portion, one of the resin sheet the fold bonded portion And a pressing member that presses and adheres to the lower outer surface on the side.

  According to this configuration, the folded state of the folded adhesive portion can be maintained, and the tip of the folded adhesive portion can be brought into contact with the edge of the lower outer surface of the resin sheet on one side. And when the packaging bag manufactured with this manufacturing apparatus is in a bag state, the outer surface of the bottom surface portion can be configured with two surfaces, that is, the lower outer surface of the other side resin sheet and the outer surface of the folded bonding portion. Become. Since these two surfaces are also continuous outer surfaces, when the packaging bag is made self-supporting, the entire surface is easy to come into contact with the mounting surface, which can contribute to improvement of the self-supporting stability of the packaging bag.

In addition, a series of operations such as raising the folded adhesive portion, applying the adhesive layer, folding, and bonding can be performed continuously. And as for the packaging bag manufactured with this manufacturing apparatus, a return | turnback adhesion part becomes difficult to leave | separate from the lower outer surface of the resin sheet of one side, and the return | turnback state of a return | turnback adhesion part is stabilized. If the folded adhesive part and the lower outer surface of the resin sheet on one side are separated from the repulsion of the folded adhesive part, and the space between the lower outer surface and the mounting surface is separated, the self-supporting stability of the packaging bag is reduced accordingly. To do. In the packaging bag manufactured with this manufacturing apparatus, the reduction of such self-supporting stability is suppressed.

Invention of Claim 2 is a manufacturing apparatus of the packaging bag of Claim 1 , Comprising: The said guide member is a pair of rail part extended from the upstream side to the downstream side, and mutually opposingly arranged, The distance between one rail part and the other rail part becomes smaller as it goes downstream.

  According to this structure, the relative position of each rail part and a packaging bag also changes by the space | interval of a pair of rail part changing. And the change of this relative position can be utilized for raising of the folding | returning adhesion | attachment part of the packaging bag by a rail part. Therefore, it is possible to cause the folded adhesive portion to be raised with a simple configuration.

  According to the present invention, a packaging bag with improved self-supporting stability can be manufactured.

The perspective view of the packaging bag of this invention. FIG. 2 is a sectional view taken along line AA in FIG. 1. The front view of the packaging bag of this invention. The front view of the bag body of this invention. The side view of the manufacturing apparatus of the packaging bag of this invention. (A) is a top view of the manufacturing apparatus of a packaging bag. (B) is a top view of a rear rail part and a front rail part. (A) is the sectional view on the AA line in Fig.6 (a). FIG. 6B is a sectional view taken along line BB in FIG. (C) is CC sectional view taken on the line in Fig.6 (a). (D) is the DD sectional view taken on the line in Fig.6 (a). (A) And (b) is a model enlarged view of the male blade type | mold of this invention, and a female blade type | mold. (A) is an expanded perspective view of the male blade type | mold and female blade type | mold in a modified example, (b) is sectional drawing of the male blade type | mold and female blade type | mold in a modified example. (A) And (b) is a front view of the resin sheet (bag body) in the example of a change. The front view of the packaging bag in the example of a change. The front view of the packaging bag in the example of a change. The perspective view of the conventional packaging bag. AA line sectional view in FIG.

Hereinafter, an embodiment relating to a packaging bag manufacturing apparatus will be described with reference to FIGS.
First, a packaging bag 10 manufactured by the packaging bag manufacturing apparatus of the present invention and formed in a gusset-type bag shape by a plurality of sheet materials will be described with reference to FIGS. In the following description, the direction of the packaging bag 10 will be described with reference to the front-rear direction (thickness direction), the left-right direction (width direction), and the up-down direction (height direction) shown in FIG.

  As shown in FIG. 3, the front sheet portion 20 made of a thermoplastic resin and having one surface heat weldable has a shape in which both upper rectangular portions of the rectangular shape are cut into a substantially trapezoidal shape. And the width of the upper part is formed to be small. Moreover, the upper edge part of the front sheet | seat part 20 is formed so that it may protrude in a semicircle shape to the outer side of the left-right direction, respectively. On the other hand, the back sheet portion 25 made of a thermoplastic resin and having one surface having heat-weldability is formed in the same shape as the front sheet portion 20. And the front sheet | seat part 20 and the back sheet | seat part 25 are opposingly arranged so that the surface which has mutual heat welding property may face each other.

  Although not shown in the drawings, the folded sheet portion 30 having one surface heat-welded is not longer than the front sheet portion 20 in a state where the folded sheet portion 30 is not folded in two. The dimensions and the shape of the side edge are formed in the same manner as the front sheet portion 20. That is, the folding sheet portion 30 has a rectangular shape whose width is shorter than that of the front sheet portion 20 described above, and has a shape in which both corners on the upper side are cut into a substantially trapezoidal shape. The folded sheet portion 30 formed in such a shape is folded in a double-folded state so that the surface having heat-weldability is on the side (mountain side) facing the front sheet portion 20 and the back sheet portion 25. As shown in FIG. 3, the pair of folding sheet portions 30 are arranged between the front sheet portion 20 and the rear sheet portion 25 so that the fold line 30 a indicated by a dotted line in FIG. The sheet part 20 and the back sheet part 25 are disposed along the left and right side edges.

  As shown in FIG. 3, the bottom edge part is heat-welded in the packaging bag 10 in which each sheet part is arrange | positioned, and the return | turnback adhesion part 11 is formed. In the center part in the width direction of the folded adhesive part 11, the folded sheet part 30 is not sandwiched, and the front sheet part 20 and the rear sheet part 25 are bonded to form a double structure. And the folding | returning adhesion | attachment part 11 is the folding which opposes the front sheet | seat part 20 and its front sheet | seat part 20 in the width direction both sides where the fold sheet | seat part 30 is pinched | interposed between the front sheet | seat part 20 and the back sheet | seat part 25. While the sheet part 30 is bonded, a quadruple structure is formed in which the back sheet part 25 and the folded sheet part 30 facing the back sheet part 25 are bonded. And the chamfering part 17 chamfered in circular arc shape is formed in the lower corner part of the return | turnback adhesion part 11 (packaging bag 10).

  As shown in FIG. 1, the packaging bag 10 is formed with four side edge adhesive portions 12 extending substantially in the vertical direction. One of the side edge bonding parts 12 on the front sheet part 20 side bonds one side edge part of the front sheet part 20 and the side edge part of the folded sheet part 30 disposed to face the side edge part. The other is formed by adhering the other side edge of the front sheet portion 20 and the side edge of the folded sheet portion 30 disposed to face the side edge. In addition, the side edge adhesive portions 12 are formed in the same manner on both side edge portions of the back sheet portion 25. As shown in FIG. 3, the side edge bonding portion 12 is formed with a substantially equal width in the extending direction. And in the side edge adhesion | attachment part 12, the notch part 18 for cutting off and opening the upper edge part of the packaging bag 10 is formed in the part where the width of the packaging bag 10 is small. The cut portion 18 is formed at the same position in the vertical direction, one for each of the four side edge adhesive portions 12. In the width direction, the maximum length from the inner end 12 a of the side edge bonding portion 12 to the fold 30 a of the folded sheet portion 30 is set to the length Y.

  As shown in FIG. 3, the portion adjacent to the upper side of the folded adhesive portion 11 of the packaging bag 10, where the front sheet portion 20 and the folded sheet portion 30 are opposed to each other, is one lower on both sides in the left-right direction. An adhesive portion 13 is formed. Similarly, in the portion adjacent to the upper side of the folded adhesive portion 11 of the packaging bag 10 and the portion where the back sheet portion 25 and the folded sheet portion 30 face each other, one lower adhesive portion 13 is provided on each side in the left-right direction. Is formed. The lower adhesive portion 13 formed in a right-angled isosceles triangle shape is formed such that the right-angled corner portion is on the outer side in the width direction and faces downward. The height of the lower bonding portion 13 having a right isosceles triangular shape (the length on the inner end 12a side of the side edge bonding portion 12) is set to the length Z. The length Z is formed to be equal to the length Y from the inner end 12 a of the side edge bonding portion 12 to the fold line 30 a of the folded sheet portion 30.

  As shown in FIG. 3, the upper edge part of the packaging bag 10 is heat-welded to form an upper edge adhesive part 14. The upper edge bonding portion 14 has a double structure or a quadruple structure, similarly to the folded bonding portion 11 described above. That is, in the center portion in the left-right direction where the folded sheet portion 30 is not sandwiched, the upper edge bonding portion 14 has a double structure in which the front sheet portion 20 and the rear sheet portion 25 are bonded. And the upper edge adhesion part 14 opposes the front sheet part 20 and the front sheet part 20 in the width direction both sides where the folding sheet part 30 is inserted | pinched between the front sheet part 20 and the back sheet part 25. The folded sheet part 30 is bonded, and a quadruple structure is formed in which the back sheet part 25 and the folded sheet part 30 facing the back sheet part 25 are bonded. In addition, by bonding the sheet portions, the upper edge bonding portion 14 is bonded to the sheet portions of the portions protruding in the semicircular shape on the outer sides in the left-right direction, thereby forming the holding portions 19. .

  In the packaging bag 10 formed as described above, the front sheet portion 20 and the rear sheet portion 25 are separated from each other, so that an accommodation space is formed inside, and the accommodation space is filled with contents. In the packaging bag 10 in such a bag state, as shown in FIGS. 1 and 2, each folded sheet portion 30 that is folded in a folded state as the front sheet portion 20 and the rear sheet portion 25 are separated from each other. Is expanded to produce a thickness in the front-rear direction. And each sheet | seat which comprises the packaging bag 10 bends the part adjacent to the upper side of the folding | returning adhesion part 11 along the fold line R shown in FIG. 3, and the bottom face part 10a is formed. In the present embodiment, the folding line R is a straight line connecting the upper vertex of the left and right lower adhesive portions 13 and the upper vertex of the other lower adhesive portion 13.

  Here, the thickness of the packaging bag 10 is twice the length Y from the inner end 12 a of the side edge bonding portion 12 to the fold 30 a of the folded sheet portion 30. Further, the length Z on the inner end 12 a side of the side edge bonding portion 12 in the lower bonding portion 13 is equal to the length Y. Therefore, as shown in FIG. 2, when the packaging bag 10 is viewed in cross-section at the center in the left-right direction, the length Z is spaced from the base end 11 a of the folded adhesive portion 11 of the front sheet portion 20 with respect to the base end 11 a. The lower portion 20 a up to the bent line R is bent toward the accommodation space so as to form the bottom surface portion 10 a of the packaging bag 10. And the lower part 25a from the base end 11a of the folding | adhering adhesion | attachment part 11 to the fold line R which separated the length Z with respect to the base end 11a among the back surface sheet parts 25 makes the bottom face part 10a of the packaging bag 10. It is bent to the accommodation space side. Further, at the portion where the folded sheet portions 30 are sandwiched on both sides of the packaging bag 10, the lower portion of the folded sheet portion 30 facing the lower portion 20 a of the front sheet portion 20 and the lower portion 25 a of the rear sheet portion 25 is also folded. Yes. A bottom surface portion 10a is configured by the lower portion 20a of the front sheet portion 20, the lower portion 25a of the rear sheet portion 25, the lower portion of the folded sheet portion 30 facing them, and the folded adhesive portion 11.

  As shown in FIG. 2, in the bag state, the folded adhesive portion 11 of the packaging bag 10 is folded back to the front sheet portion 20 side so that the tip 11b faces the front side. In the present embodiment, the length X from the base end 11 a to the tip end 11 b of the folded adhesive portion 11 is formed to be equal to the length Z (length Y) in the front-rear direction of the lower portion 20 a of the front sheet portion 20. Therefore, in the packaging bag 10 in the bag state, the folded adhesive portion 11 is opposed to the outer surface of the lower portion 20a of the front sheet portion 20, and covers the entire outer surface of the lower portion 20a of the front sheet portion 20. . Further, the leading end 11b of the folded adhesive portion 11 comes into contact with the edge 20b of the outer surface of the lower portion 20a of the front sheet portion 20. And in the state which made the packaging bag 10 of the bag state self-supported, the contact with respect to a mounting surface by two surfaces of the outer surface of the lower part 25a of the back sheet | seat part 25 and the outer surface of the folding | turning adhesion part 11 among the bottom face parts 10a. A surface is constructed. These two surfaces are both continuous surfaces constituted by one surface (outer surface) of the back sheet portion 25.

  As shown in FIG. 2, an adhesive layer 40 is interposed between the folded adhesive portion 11 and the outer surface of the lower portion 20 a of the front sheet portion 20. The adhesive layer 40 in the present embodiment is formed of a so-called hot melt adhesive that is applied in a molten state and exhibits adhesiveness when solidified. As schematically shown in FIG. 3, the adhesive layer 40 has three adhesive layers 40 arranged in the left-right direction at the center in the length direction from the base end 11 a to the tip end 11 b in the folded adhesive portion 11. Has been granted. By this adhesive layer 40, the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20 are bonded, and the folded adhesive portion 11 is fixed in a folded state and is difficult to separate from the outer surface of the lower portion 20a of the front sheet portion 20. It has become.

  As shown in FIG. 2, the adhesive layer 40 also functions as a spacer member that fills the space S formed between the folded adhesive portion 11 and the outer surface of the lower portion 20 a of the front sheet portion 20. That is, between the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20, the folded adhesive portion 11 is particularly near the base end 11a side (the front and rear direction center side of the packaging bag 10) of the folded adhesive portion 11. There is a portion where the outer surface of the lower portion 20a of the front sheet portion 20 is difficult to be in direct contact, and a space S is formed when these do not contact. An adhesive layer 40 as a spacer member is interposed in a part of the space S, a part of the folded adhesive part 11 is in contact with the adhesive layer 40 (spacer member), and a lower part 20a of the front sheet part 20 is provided. A part of the outer surface is in contact with the adhesive layer 40 (spacer member).

Next, the packaging bag manufacturing apparatus will be described with reference to FIGS.
As shown in FIG. 5, the manufacturing apparatus of the present embodiment includes a bag making machine P that forms a belt-shaped resin sheet in a bag shape, and contents in the bag formed by the bag making machine P. A filling machine F for filling and sealing is provided. As the bag making machine P and the filling machine F, generally usable bag making machines and filling machines such as the bag making and filling machine of Patent Document 1 can be adopted except that a through hole 52 described later is formed. Therefore, detailed illustration is omitted, and an outline of the operation is illustrated below.

  The bag making machine P is supplied with four strip-shaped resin sheets. Two of the four belt-shaped resin sheets are arranged so that the surfaces having heat-welding properties face each other. The remaining two sheets are folded in two along the longitudinal direction, and are arranged along the side edges between the two resin sheets arranged opposite to each other. That is, the two resin sheets constitute the front sheet portion 20 and the rear sheet portion 25 of the manufactured packaging bag 10, and the remaining two sheets constitute a pair of folded sheet portions 30.

  The bag making machine P is provided with a transport roller for transporting the four resin sheets arranged as described above along the longitudinal direction thereof (the vertical direction of the bag body 50 to be manufactured). As shown in FIG. 4, the transport roller intermittently feeds the belt-shaped resin sheet from the upstream side at every predetermined transport length W set longer than the length of the bag body 50 to be manufactured. Transport downstream. The bag making machine P is bonded to the side edge bonding portion 12 of the resin sheet (each sheet portion) folded in the longitudinal direction and the left and right outer sides (side edge margin portion 54) of the side edge bonding portion 12. A side edge sealer is provided. The side edge sealer portions sandwiching and adhering the resin sheet are arranged so as to extend along the conveying direction of the resin sheet, one on each of the left side and the right side. The sealer surface of the left side edge sealer portion is formed with a constant width on the downstream side, and the width on the upstream side increases toward the right side sealer side. Similarly, the sealer surface of the right side edge sealer portion is formed with a constant width on the downstream side, and the width on the upstream side increases toward the left side edge sealer. . That is, each side edge sealer simultaneously bonds the side edge adhesive portion 12 of the bag body 50 shown in FIG. 4 and the adhesive portion of the side edge margin portion 54 outside thereof.

  Further, the bag making machine P is provided with a punching device that forms a through hole 52 at a predetermined position of the resin sheet. As shown in FIG. 4, the punching device forms a total of two circular through holes 52, one on each of the upper left and right ends of the bag body 50 (packaging bag 10) formed by the filling machine F. The interval between the two through holes 52 is formed to be the same as the interval between two positioning pins 85 of a male blade mold 84 to be described later.

  The filling machine F is provided with a hermetic sealer part that adheres and seals the resin sheets on which the side edge adhesive parts 12 are formed by the bag making machine P. The sealer surface of the hermetic sealer portion has a shape such that a right-angled corner portion of a right-angled isosceles triangle is connected to both sides of the upper edge of the rectangular portion so as to face the outside in the width direction. That is, the sealer surface of the hermetic sealer portion is a quadrangular portion thereof, and the upper edge margin portion 51 above and on the left and right outer sides of the upper edge adhesive portion 14 and the upper edge adhesive portion 14 on the downstream side bag body 50 shown in FIG. 4, the folded bonding portion 11 of the upstream bag body 50 shown in FIG. 4 is bonded, and at the same time, the lower bonding portion 13 of the upstream bag body 50 is bonded at the right triangle portion. In addition, although an adhesion part will be formed ranging over both the downstream bag body 50 and the upstream bag body 50 by a sealing sealer part, in the upstream bag body 50 at the time of formation of the adhesion part, it is upper. The adhesion part of the edge adhesion part 14 and the upper edge margin part 51 is not formed. Therefore, the upstream bag body 50 is in a bag state in which the upper edge portion and the upper edge blank portion 51 of the bag body 50 can be opened as the resin sheets are separated from each other.

  The filling machine F is provided with a filling portion for filling the contents through the opening of the upper edge portion and the upper edge margin portion 51 in the upstream bag body 50 in the above-described bag state. The filling part is on the upstream side of the folded adhesive part 11 and the lower adhesive part 13 formed by the hermetic sealer part, and fills the contents in the accommodation space surrounded by the four resin sheets. The resin sheet filled with the contents is conveyed to the downstream side by the conveyance length W described above, and an adhesive portion of the upper edge adhesive portion 14 and the upper edge margin portion 51 is formed and sealed by the sealing sealer portion.

  On the other hand, the filling machine F is provided with a cutting blade for cutting a portion bonded by the hermetic sealer. This cutting blade is composed of a pair of blade types arranged on the resin sheet side constituting the front sheet portion 20 and the resin sheet side constituting the back sheet portion 25 so that the conveyed resin sheet can be sandwiched. ing. In addition, a convex portion is formed on one of the pair of blade molds, and a concave portion is formed on the other. The outer edges of the concave portion and the convex portion are such that the left and right sides of a straight line extending in the left-right direction face upward. It is formed in a shape that is curved in an arc shape. And a pair of blade type | mold is a position where the length from the base end 11a of the folding | adherence adhesion part 11 of the upstream resin sheet to the front-end | tip 11b becomes predetermined length X, when each conveyed resin sheet stops. The installation position is set so that it can be cut with the. Moreover, the chamfering part 17 is formed in the resin sheet (folded adhesion part 11) with the cutting | disconnection by a pair of blade type | mold. Therefore, as shown in FIG. 4, a protrusion 53 that protrudes upward in an arc shape corresponding to the shape of the chamfered portion 17 is formed on the resin sheet (bag body 50) on the downstream side of the cutting blade. When cutting the resin sheet with the cutting blade, the positional relationship between the cutting blade and the resin sheet (bag body 50) is defined by the conveyance length W of the conveyance roller of the bag making machine P described above.

  The bag body 50 which is formed into a bag shape and filled with the contents is manufactured by the bag making machine P and the filling machine F described above. The bag body 50 has a shape in which the downstream bag body 50 is separated from the upstream bag body 50 in FIG. 4, and is formed in a substantially rectangular shape in front view at this point. That is, the upper corner portions of the front sheet portion 20 and the rear sheet portion 25 of the bag body 50 are not cut out yet.

  Further, the bag body 50 is divided into a storage space side and a mark part side based on the side edge bonding portion 12 and the upper edge bonding portion 14. Specifically, in this embodiment, as shown in FIG. 4, the resin sheets constituting the bag body 50 are not bonded, and the portion constituting the accommodation space of the bag body 50 is the accommodation space side, and the resin When the sheet is cut and manufactured as a packaging bag 10, the outer side of the upper end 12 b of the side edge bonding portion 12 and the outer end 14 a of the upper edge bonding portion 14 is the mark portion side where the through hole 52 is formed. That is, in the present embodiment, the upper edge margin portion 51 and the side edge margin portion 54 constitute a mark portion side portion of the bag body 50. In FIG. 4, the upper end 12 b of the side edge adhesive portion 12 that is the boundary between the side edge adhesive portion 12 and the side edge margin portion 54, and the upper boundary that is the boundary between the upper edge adhesive portion 14 and the upper edge margin portion 51. The outer end 14a of the edge bonding portion 14 is illustrated by a broken line.

Next, the apparatus configuration of the finishing machine 60 will be described with reference to the drawings.
In the following description, a bag-like resin sheet in a state before being subjected to each processing step is expressed as a bag body 50, and portions common to the packaging bag 10 described above are expressed by the same reference numerals.

  As shown in FIG. 5, the carry-in device 61 installed on the floor is formed with a carry-in device housing 63 which is supported by a plurality of support legs 62 and has a space inside. In the carry-in device housing 63, a drive roller 64a is rotatably supported with respect to the carry-in device housing 63, and the drive roller 64a is drivingly connected to a motor (not shown) incorporated in the carry-in device housing 63. ing. A plurality of pulleys 64 b are pivotally supported in the carry-in device housing 63 so as to be rotatable with respect to the carry-in device housing 63. A conveyor belt 64 is wound around the drive roller 64a and the plurality of pulleys 64b. Driving of the motor and the like drivingly connected to the driving roller 64a is controlled by a control device (not shown), and the conveyor belt 64 rotates (moves) based on the rotation of the driving roller 64a.

  As shown in FIG. 5, on the downstream side (right side in FIG. 5) of the carry-in device 61 in the conveyance direction of the bag body 50 (left-right direction in FIG. 5), A finishing machine body 70 for cutting 50 resin sheets is installed on the floor. The finishing machine main body 70 is formed with a rectangular cylindrical main body housing 72 supported by a plurality of support portions 71. The main body housing 72 extends along the conveying direction of the bag body 50, and the bag body 50 is carried in from one opening of the main body housing 72 and the bag body 50 is carried out from the other opening.

  As shown in FIG. 6A, in the main body housing 72, a rear rail portion 73 and a front rail portion 74 are fixed to the inner wall of the main body housing 72 along the conveyance direction of the bag body 50. As shown in FIG. 6B, the rear rail portion 73 and the front rail portion 74 are disposed to face each other so as to be parallel to each other. Further, the height position of the rear rail portion 73 (the height position of the upper surface of the bottom wall portion 73b) is set to be substantially the same as the upper surface of the conveyor belt 64 of the carry-in device 61.

  As shown in FIGS. 7A to 7D, the rear rail portion 73 includes a vertical wall portion 73a and a bottom wall portion 73b extending from the lower side of the vertical wall portion 73a to the front rail portion 74 side. The cross section is substantially L-shaped. The extension length of the bottom wall portion 73b toward the front rail portion 74 is formed to be slightly smaller than one half of the thickness in the front-rear direction of the bag body 50 filled with the contents. As shown in FIG. 7B, the front rail portion 74 includes a vertical wall portion 74a and a guide portion 75 extending from the lower side of the vertical wall portion 74a to the rear rail portion 73 side. Further, as shown in FIG. 6B, the extension length of the guide portion 75 toward the rear rail portion 73 is such that the distal end surface 75a of the guide portion 75 and the rear rail are extended to a predetermined point Q on the downstream side. The gap between the portion 73 and the bottom wall portion 73b is formed so as to gradually decrease toward the downstream side in the transport direction. At the point Q, the front rail portion 74 has a substantially L-shaped cross section that is the same as the cross sectional shape of the rear rail portion 73. On the other hand, the guide portion 75 is not formed downstream of the point Q. Further, as shown in FIGS. 7C and 7D, on the downstream side of the point Q, the lower end portion of the vertical wall portion 74a of the front rail portion 74 is cut out by a predetermined length. The vertical wall portion 74 a does not exist below the upper surface of the bottom wall portion 73 b of the rail portion 73.

  As shown in FIG. 5, on the upstream side in the main body housing 72, the main body housing 72 supports a pair of intake conveyors 76 that are opposed to each other in the horizontal direction orthogonal to the conveyance direction of the bag body 50. . Specifically, as shown in FIG. 6A, the inner wall on the front side of the main body housing 72 is positioned adjacent to the upstream end of the front rail portion 74 at the front side (lower side in FIG. 6A). The drive roller 76a of the intake conveyor 76 on the side) is rotatably mounted. The driving roller 76a is drivingly connected to a motor or the like, and the driving of the motor or the like is controlled by a control means. A pulley 76b of the take-in conveyor 76 is rotatably mounted on the inner side wall on the front side of the main body housing 72 at a position upstream of the drive roller 76a (left side in FIG. 6A). A conveyor belt 76c is wound around the drive roller 76a and the pulley 76b, and the conveyor belt 76c moves as the drive roller 76a rotates. Similarly, the rear side (upper side in FIG. 6A) intake conveyor 76 has a driving roller 76a and a pulley 76b attached to the inner wall on the rear side of the main body housing 72. A conveyor belt 76c is wound around the driving roller 76a and the pulley 76b. In FIG. 6A, a part of the rear intake conveyor 76 is shown hidden by the chain conveyor unit 78.

  As shown in FIG. 6A, two drive rollers 78 a of the chain conveyor unit 78 are pivotally supported on the main body housing 72 so as to be rotatable with respect to the main body housing 72. Each drive roller 78a is pivotally supported in the vicinity of the upstream end and the downstream end of the rear rail 73 on the rear side (upper side in FIG. 6A) of the rear rail 73. Each is drivingly connected to a motor or the like (not shown). A chain 78b is wound around the two drive rollers 78a, and a claw portion 78c for pushing the bag body 50 to the downstream side is projected from the outer surface of the chain 78b at predetermined intervals. When the claw portion 78c is disposed on the front side (lower side in FIG. 6A), the claw portion 78c is positioned directly above the bottom wall portion 73b of the rear rail portion 73 and the guide portion 75 of the front rail portion 74. ing. The motor connected to the two driving rollers 78a is controlled to repeat driving and stopping by a control means (not shown), and the chain 78b and the claw portion 78c are intermittently driven with the driving of each driving roller 78a. Move to. That is, the chain conveyor part 78 in this embodiment is comprised as an intermittent chain conveyor.

  As shown in FIG. 5, the base 83 of the excision device 82 is fixed to the upper surface of the inner wall of the main body housing 72. As shown in FIG. 6A, the fixing position of the base 83 is set so that the base 83 is arranged immediately above the rear rail portion 73 and the front rail portion 74 and upstream of the point Q. . The base 83 incorporates four drive cylinders to which fluid (for example, air) is supplied from a fluid pressure generator 81 built in the main body housing 72. Male blade dies 84 as blade portions are connected to the tips of the piston rods of two of the drive cylinders. On the other hand, a female blade mold 86 as a blade portion is connected to the tip ends of the piston rods of the remaining two drive cylinders, and the female blade mold 86 is opposed to the male blade mold 84. That is, in the present embodiment, two sets of a pair of blade molds configured by the male blade mold 84 and the female blade mold 86 are provided. The male blade mold 84 and the female blade mold 86 each have a cutting position where the opposing surfaces come into contact with each other and the resin sheet is sandwiched and cut when fluid is supplied to and discharged from the drive cylinder, and the opposing surfaces are separated from each other at the maximum. Move between the separated positions. The supply and discharge of fluid from the fluid pressure generator 81 to each drive cylinder, that is, the movement of the male blade mold 84 and the female blade mold 86 is controlled by the control means.

  As shown in FIG. 8, the female blade mold 86 of the pair of blade molds has a recess 87 for cutting the adhesive portion of the bag body 50, and the male blade mold 84 includes a female blade mold 86. A convex portion (not shown) having a shape corresponding to the concave portion 87 of the blade mold 86 is formed. Specifically, as shown in FIG. 8A, the concave portion 87 of the female blade mold 86 becomes narrower as the width in the left-right direction increases upward in the lower portion, and the width in the left-right direction in the upper portion. It is formed substantially constant. Further, the recess 87 has a portion formed so as to bite in a triangular shape on the center side in a portion where the width in the left-right direction is substantially constant, and a portion in which the width in the left-right direction is formed substantially constant Is formed so as to project in a semicircular shape outward in the left-right direction. That is, the outer edge 87a of the recessed part 87 of the female blade type | mold 86 is formed in the shape in alignment with the upper side end 12b of the side edge adhesion part 12 and the outer side edge 14a of the upper edge adhesion part 14 of the packaging bag 10 to be manufactured. And the convex part of the male blade type | mold 84 is formed in the substantially identical shape so that the recessed part 87 of the female blade type | mold 86 may be fitted. In FIG. 8, the base 83 is not shown, and the cutting position of the bag body 50 by the male blade mold 84 and the female blade mold 86 (the upper end 12b of the side edge bonding portion 12 and the outer end of the upper edge bonding portion 14). 14a) is schematically illustrated by a broken line.

  As shown in FIG. 8, in the male blade mold 84, the surface facing the female blade mold 86 is a rod-shaped detector with a circular cross-section and a hemispherical tip on the outer edge side of the convex portion. The two positioning pins 85 protrude toward the female blade mold 86. Further, the female blade mold 86 is formed with two pin housing holes 88 as housing portions through which the positioning pins 85 can penetrate on the outer edge side of the recess 87. The two pin accommodation holes 88 are formed so as to open in the same circular shape as the cross-sectional shape of the positioning pin 85, respectively, and are formed so that the interval thereof is the same as the interval of the positioning pin 85. As described above, since the interval between the two through holes 52 of the bag body 50 is the same as the interval between the two positioning pins 85, the two positioning pins 85 and the two pin receiving holes 88 are formed. And the interval between the two through holes 52 of the bag body 50 is the same.

  As shown in FIG. 8, a total of three suction holes 89 are formed in the portion of the female blade mold 86 where the recess 87 is not formed, one above the recess 87 and one in both the left and right directions of the recess 87. ing. These suction holes 89 are arranged at a predetermined interval with respect to the outer edge 87a of the recess 87, and when the male blade mold 84 and the female blade mold 86 are in the excision position with the bag body 50 interposed therebetween, The entire opening is closed by the bag body 50 (back sheet portion 25). In addition, a suction pump is connected to each suction hole 89 so as to suck air from the male blade mold 84 side of the suction hole 89 to the opposite side. The driving of the suction pump (air suction) is controlled by the control device so as to be synchronized with the movement of the male blade mold 84 and the female blade mold 86.

  The excision device 82 incorporates a penetration error detection device (not shown) that monitors the change in position of the piston rod when the male blade mold 84 and the female blade mold 86 are brought close to each other. This penetration error detecting device detects a position change of the double-edged die when the male blade die 84 and the female blade die 86 are brought close to each other as a change in position of the piston rod, and the change in the position change is out of a predetermined allowable range. In this case, it is determined that the positioning pin 85 does not penetrate through the through hole 52 of the bag body 50. If it is determined that there is an error state, the penetration error detection device outputs a penetration error signal to the control means. When the penetration error signal is output, the control unit stops the driving of the motor and the fluid pressure generator, and stops the operation of the entire finishing machine 60 including the finishing machine body 70.

  As shown in FIG. 5, an adhesive layer applying member 79 is supported inside the main body housing 72 so as to be positioned below the rear rail portion 73 and the front rail portion 74 and downstream of the point Q. Yes. The adhesive layer applying member 79 includes a container 79a in which a hot melt adhesive is accommodated and a glue gun 79b that discharges the hot melt adhesive in a molten state, and the discharge timing of the adhesive from the glue gun 79b is controlled. It is controlled by means. Moreover, as shown in FIG.7 (c), the glue gun 79b of the adhesion layer provision member 79 has the adhesion layer 40 in the center of the length direction from the base end 11a to the front-end | tip 11b in the folding | returning adhesion part 11 of the bag body 50 mentioned later. It is arranged close to the front rail portion 74 in the vertical direction so that it can be applied.

  As shown in FIG. 5, two sets of pressing machines 80 that perform a pressing operation on the bag body 50 are supported inside the main body housing 72. The pressing machine 80 has a support position with respect to the main body housing 72 so as to be positioned below the rear rail part 73 and the front rail part 74 and downstream of the adhesive layer applying member 79. A drive cylinder (not shown) is built in the main body portion 80a of the pressing machine 80, and fluid is supplied to the drive cylinder from a fluid pressure generating device 81 built in the main body housing 72, so that the piston of the drive cylinder. The rod is movable up and down. A pressing member 80b is connected to the piston rod of the drive cylinder of the main body 80a, and is movable in the vertical direction as the piston rod moves. The supply of fluid from the fluid pressure generating device 81 to the drive cylinder of the main body 80a is controlled by the control means. As shown in FIG. 7D, the upper surface of the pressing member 80 b is formed in a flat shape, and the pressing member 80 b has a flat upper surface that faces the upper surface of the bottom wall portion 73 b of the rear rail portion 73. It moves in the up-down direction between the pressing position that becomes one and the retracted position below the lower surface of the bottom wall portion 73 b of the rear rail portion 73. Further, an electric heater (not shown) is built in the main body 80a, and the pressing member 80b can be heated by the electric heater.

  As shown in FIG. 5, on the downstream side of the finishing machine main body 70, an unloading device 65 for unloading the manufactured packaging bag 10 to a predetermined position is installed on the floor surface. The carry-out device 65 has the same configuration as the carry-in device 61 described above. That is, the carry-out device 65 is formed with a carry-out device housing 67 that is supported by a plurality of support legs 66 and has a space inside. In the carry-out device housing 67, a drive roller 68a that is drivingly connected to a motor or the like (not shown) is rotatably supported with respect to the carry-out device housing 67. A plurality of pulleys 68 b are pivotally supported in the carry-out device housing 67 so as to be rotatable with respect to the carry-out device housing 67. A conveyor belt 68 is wound around the drive roller 68a and the plurality of pulleys 68b. The rotation speed of the driving roller 68a is controlled by the control device, and the conveyor belt 68 rotates (moves) based on the rotation of the driving roller 68a.

Next, the operation of the packaging bag manufacturing apparatus, in particular, the operation of the finishing machine 60 will be described with reference to FIGS.
In the present embodiment, the bag body 50 cut by the cutting blade of the filling machine F falls on the conveyor belt 64 of the carry-in device 61 so as to be self-supporting. In addition, from the filling machine F, the bag body 50 is discharged in a state where the tip 11b of the folded adhesive portion 11 is inclined so as to face a certain direction. Therefore, any bag body 50 that has fallen and becomes self-supported is folded back so that the front end 11b of the folded bonding portion 11 faces the same direction. And when the bag body 50 is conveyed to the rear side rail part 73 and the front side rail part 74, it falls to the carrying-in apparatus 61 so that the front side by which the front end 11b was turned up turns into the front side rail part 74 side.

  The bag body 50 sent out from the carry-in device 61 to the pair of intake conveyors 76 is sent out onto the rear rail portion 73 and the front rail portion 74 by the conveyor belts 76c of the pair of intake conveyors 76. At this time, the motor or the like drivingly connected to the driving roller 76a of the pair of intake conveyors 76 is controlled by the control means so as to be driven in accordance with the intermittent operation of the chain conveyor unit 78, and the pair of intake conveyors 76 The bags 50 are sent to the downstream side one by one in accordance with the intermittent operation of the chain conveyor unit 78. The bag body 50 sent out on the rear rail portion 73 and the front rail portion 74 is repeatedly transported and stopped downstream by the claw portion 78c of the chain conveyor portion 78, and then the rear rail portion 73 and the front rail portion 74. It is sent out to the downstream side. At this time, as shown in FIGS. 6B and 7B, the distance between the front end surface 75a of the guide portion 75 of the front rail portion 74 and the bottom wall portion 73b of the rear rail portion 73 is the upstream side. The distance becomes smaller toward the point Q on the downstream side. Therefore, as it goes to the point Q, the folded adhesive portion 11 that is folded back to the front side due to the weight of the contents is pushed out to the front end surface 75a of the guide portion 75 from the outer surface of the lower portion 20a of the front sheet portion 20. Get up in the direction of separation.

  On the other hand, on the rear rail portion 73 and the front rail portion 74, the bag body 50 fed to the position corresponding to each blade type of the cutting device 82 is the upper edge blank portion 51 and the side edge blank portion 54 by the cutting device 82. Is excised. The excision operation of the excision device 82 is controlled so as to be executed during a period in which the bag body 50 is stopped after the chain conveyor section 78 performs the conveyance operation twice and before the next conveyance operation is performed. . Therefore, in this embodiment, the two bags 50 are cut simultaneously by the two sets of cutting blades of the cutting device 82. When cutting with the cutting device 82, as shown in FIGS. 8A and 8B, first, the positioning pin 85 of the male blade mold 84 is passed through the through hole 52 formed in the bag body 50. At this time, even if the positional relationship between the through hole 52 of the bag body 50 and the positioning pin 85 is slightly deviated, the through hole 52 is guided to the hemispherical surface at the tip of the positioning pin 85 and the positioning pin 85 is inserted into the through hole 52. Is penetrated. Then, the bag body 50 through which the positioning pins 85 are penetrated is restricted from moving in the vertical and horizontal directions, and is accurately positioned in the vertical and horizontal directions with respect to the male blade mold 84.

  On the other hand, when the positioning pin 85 is not penetrated into the through hole 52, the bag body 50 is pushed out to the female blade mold 86 side by the positioning pin 85 and the pin of the female blade mold 86 is formed by the resin sheet constituting the bag body 50. The opening of the accommodation hole 88 is blocked. Therefore, the distal end of the positioning pin 85 is blocked by the resin sheet constituting the bag body 50, and the positioning pin 85 cannot be accommodated in the pin accommodation hole 88. If the positioning pin 85 cannot be accommodated in the pin accommodation hole 88, the male blade mold 84 and the female blade mold 86 will not be able to approach any more. The transition of the position change of the male blade mold 84 and the female blade mold 86 is grasped by the penetration error detecting device as the transition of the position change of the piston rod, and an error occurs when the transition of the position change is out of the allowable range. An error signal is output by the detection device. When no error signal is output, no error signal is output, and the positioning pin 85 detects the through hole 52 and is regarded as penetrating the through hole 52.

  After positioning the bag body 50 by the positioning pins 85, the male blade mold 84 and the female blade mold 86 are moved to the cutting position in this state, and the bag body 50 is sandwiched and cut. Specifically, the male blade mold 84 and the female blade mold 86 are cut using the upper end 12b of the side edge bonding portion 12 and the outer end 14a of the upper edge bonding portion 14 on the bonding portion of the bag body 50 as cutting positions. Thus, the upper edge margin portion 51 and the side edge margin portion 54 of the bag body 50 are cut out. At this time, since the through hole 52 is formed in the upper edge blank portion 51 (marking portion side) to be removed, the through hole 52 does not remain in the bag body 50 from which each blank portion is cut off. .

  8B, when the male blade mold 84 is brought closer to the female blade mold 86, the positioning pin 85 of the male blade mold 84 is received in the pin receiving hole 88 of the female blade mold 86. The At this time, the base end side of the positioning pin 85 is fixed to the male blade mold 84, and the tip end side thereof is supported in contact with the inside of the pin accommodation hole 88. Therefore, both ends of the positioning pin 85 are supported by the male blade mold 84 and the female blade mold 86.

  On the other hand, when the male blade mold 84 and the female blade mold 86 are moved to the cutting position, the suction pump is driven to suck air from the male blade mold 84 side through the suction hole 89. Here, when the male blade mold 84 and the female blade mold 86 are in the cutting position, the opening on the male blade mold 84 side of each suction hole 89 is closed by the bag body 50 (the back sheet portion 25). Therefore, the blank portions of the separated bag body 50 are sucked into the suction holes 89 of the female blade mold 86 by the suction force of the suction pump. In this state, when the male blade mold 84 and the female blade mold 86 are moved to the separated positions, each blank portion of the bag 50 is in a state of being attracted to the female blade mold 86, while the male blade mold 84 and Since the positioning pin 85 is separated from the female blade mold 86, each blank portion of the bag body 50 is extracted from the positioning pin 85. When the male blade mold 84 and the female blade mold 86 reach the separated position, the driving of the suction pump is stopped, and the blank portion of the bag body 50 is dropped from the female blade mold 86 and discarded as a cutting residue (trimming residue).

  As shown in FIG. 5 and FIG. 7C, the bag body 50 from which each blank portion has been cut is an adhesive layer applying member 79 on the rear rail portion 73 and the front rail portion 74 on the downstream side of the point Q. Thus, the adhesive layer 40 is applied to the folded adhesive portion 11. In the present embodiment, a molten hot melt adhesive is discharged from the glue gun 79 b of the adhesive layer applying member 79 toward the folded adhesive portion 11 of the bag body 50, and the adhesive layer 40 is adhered to the folded adhesive portion 11. The glue gun 79b is controlled to discharge the adhesive three times in synchronization with the transport operation of the chain conveyor section 78. Specifically, the adhesive discharge operation is performed three times continuously when a predetermined time has elapsed with reference to the time from the point at which the chain conveyor unit 78 that intermittently starts transporting. As a result, while the folded adhesive portion 11 of the bag body 50 crosses the distal end side (right side in FIG. 7C) of the glue gun 79b, the folded adhesive portion 11 of the bag body 50 is provided with three places in the left-right direction (in FIG. Adhesive layer 40 is applied at position T).

  As shown in FIGS. 5 and 7 (d), the bag body 50 provided with the adhesive layer 40 is further fed to the pressing member 80 b on the downstream side, and the folded adhesive portion 11 is pressed by the pressing member 80 b of the pressing machine 80. Is folded back to the front side, and the packaging bag 10 is manufactured. The pressing operation of the pressing machine 80 is controlled so as to be executed during a period in which the bag body 50 is stopped after the chain conveyor unit 78 performs the transporting operation twice and before the next transporting operation is performed. . Therefore, in this embodiment, the pressing operation to the two bag bodies 50 is simultaneously performed by the two sets of pressing machines 80. As shown in FIG. 7 (d), the pressing member 80b is folded upward so as to lift the folded adhesive portion 11 from the lower side to the upper side by being moved upward. At the same time, the folded adhesive portion 11 is pressed against the outer surface of the lower portion 20 a of the front sheet portion 20, thereby bonding the folded adhesive portion 11 to the outer surface of the lower portion 20 a of the front sheet portion 20 via the adhesive layer 40. Further, by this pressing, the adhesive layer 40 applied to the folded adhesive portion 11 spreads so as to fill a part of the space S formed between the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20. become. In addition, since the pressing member 80b can be heated, even if the adhesive layer 40 is slightly cooled and solidified, it can be reheated and melted by the pressing member 80b to exhibit adhesiveness. The packaging bag 10 manufactured in this way is sent out to a carry-out device 65 installed downstream of the finishing machine main body 70 and is sent out to a predetermined place by the carry-out device 65.

According to the packaging bag 10 and the manufacturing apparatus of the packaging bag 10 of the above embodiment, the following operational effects can be obtained.
(1) In the packaging bag 10 in the bag state, the outer surface of the bottom surface portion 10 a can be constituted by two surfaces, that is, the outer surface of the lower portion 25 a of the back sheet portion 25 and the outer surface of the folded adhesive portion 11. Since these two surfaces are also continuous outer surfaces constituted by the back sheet portion 25, when the packaging bag 10 is made self-supporting, the entire surface is easy to contact the mounting surface, and the self-supporting stability of the packaging bag is improved. It can contribute to improvement.

  (2) Since the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20 are adhered by the adhesive layer 40, the folded adhesive portion 11 is difficult to separate from the outer surface of the lower portion 20a of the front sheet portion 20, and is folded and adhered. The folded state of the part 11 is stabilized. That is, the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20 are separated from the repulsion of the folded adhesive portion 11 against the folding, and a space is formed between the outer surface of the lower portion 20a of the front sheet portion 20 and the placement surface. As a result, the self-supporting stability of the packaging bag 10 is reduced accordingly. According to said adhesion structure, the reduction of such a self-supporting stability is suppressed.

  (3) In the said embodiment, since the spacer member (adhesion layer 40) is interposed between the folding | returning adhesion part 11 and the outer surface of the lower part 20a of the front sheet | seat part 20, the folding | returning adhesion part 11 arrange | positioned facing each other. And the outer surface of the lower portion 20a of the front sheet portion 20 can be in contact with each other via the spacer member, so that the substantial contact area between these two surfaces can be expanded, and the self-supporting stability of the packaging bag 10 is improved accordingly.

  (4) In the above embodiment, a hot melt adhesive is employed as the adhesive layer 40 so that the adhesive layer 40 can exhibit a function as a spacer member in addition to a function as an adhesive. Therefore, it is not necessary to separately provide a spacer member, and the configuration of the manufacturing apparatus for the packaging bag 10 can be simplified.

  (5) The length X from the base end 11 a to the tip end 11 b of the folded adhesive portion 11 is formed to be equal to the length Z on the inner end 12 a side of the side edge adhesive portion 12 of the lower adhesive portion 13. The length Z corresponds to the length in the front-rear direction of the lower portion 20a of the front sheet portion 20 in the bottom surface portion 10a. Therefore, according to the relationship between these length dimensions, the folded adhesive portion 11 is connected to the end edge 11b while the tip end 11b of the folded bonded portion 11 can be reliably brought into contact with the end edge portion 20b of the lower portion 20a of the front sheet portion 20. Jumping forward from the portion 20b can be suppressed.

  (6) Since the chamfered portion 17 is formed by chamfering the corner portion of the folded adhesive portion 11, it is possible to suppress the folded adhesive portion 11 from being caught by fingers or clothes. In particular, as described above, the tip 11b of the folded adhesive portion 11 reaches the edge 20b of the lower portion 20a, and if the chamfered portion 17 is not formed, the corner portion of the folded adhesive portion 11 is attached to fingers or clothes. There is a high possibility of getting caught. According to the chamfered portion 17 of the folded adhesive portion 11, occurrence of such a situation can be suppressed.

  (7) In the said embodiment, the through-hole 52 is provided in the bag body 50 (packaging bag 10). When the excision device 82 performs excision, the positioning pin 85 of the male blade mold 84 is penetrated into the through hole 52. Due to this penetrating relationship, the vertical and horizontal directions of the bag body 50 with respect to the male blade mold 84 are accurately determined. Positioning is possible. Therefore, according to the relationship between the through hole 52 of the bag body 50 and the positioning pin 85 of the male blade mold 84, each blank portion of the bag body 50 can be cut out accurately. Moreover, in the said embodiment, the through-hole 52 is formed in the upper edge blank part 51, and this upper edge blank part 51 is a part cut off and cut off by the cutting device 82. FIG. Therefore, the through hole 52 does not remain in the completed packaging bag 10, and it is possible to prevent the design of the packaging bag 10 from being deteriorated due to the presence of the through hole 52.

  (8) In the above embodiment, the cut portions 18 are formed in each of the four side edge adhesive portions 12 of the packaging bag 10. For example, when the cut portion 18 is cut from the right side of the packaging bag 10, the front sheet portion 20, the back sheet portion 25, and the right folded sheet portion 30 can be cut to the left side. However, the left folded sheet portion 30 is folded so that the fold line 30a faces the right side, and it is difficult to cut the left folded sheet portion 30 by a leftward cut operation. In the said embodiment, by forming the notch part 18 in each of the four side edge adhesion parts 12, for example, it cuts also from the left side, cutting out from the right side, and cuts off the upper edge adhesion part 14 of the packaging bag 10 reliably. It is possible.

  (9) In the above embodiment, since the holding portions 19 projecting outward are formed on the left and right ends of the upper edge bonding portion 14, the packaging bag 10 It is easy to hold the upper edge bonding portion 14. Therefore, it becomes easy to hold the packaging bag 10 and to perform the cutting operation of the upper edge bonding portion 14.

  (10) According to the pressing machine 80 of the finishing machine 60, it is possible to hold the folded state of the folded adhesion portion 11 and to bring the tip 11b of the folded adhesion portion 11 into contact with the edge 20b of the lower portion 20a. .

  (11) The finishing machine 60 of the above embodiment is provided with the guide part 75 of the front rail part 74, the adhesive layer applying member 79, and the pressing machine 80. With these configurations, the bag body 50 (packaging bag 10). Can be continuously raised, the adhesive layer 40 applied, the folded adhesive portion 11 folded and adhered.

  (12) Since the pressing member 80b can be heated, even if the adhesive layer 40 applied by the adhesive layer applying member 79 is solidified between the pressing member 80b and the adhesive member cannot be exhibited, The adhesive layer 40 can be remelted by the pressing member 80b to exhibit its adhesiveness.

  (13) The raising of the folded adhesive portion 11 is realized by utilizing the change in the gap between the rear rail portion 73 and the front rail portion 74 and the pushing force of the claw portion 78c against the bag body 50. Therefore, the raising of the folded adhesive portion 11 can be realized gradually and without difficulty, and can be reliably realized.

  (14) On the downstream side of the point Q, the guide rail 75 is not formed in the front rail portion 74, and the lower end portion of the vertical wall portion 74a is cut out by a predetermined length. The glue gun 79b can be arranged further upward. Therefore, even if the length X from the base end 11a to the front end 11b of the folded adhesive portion 11 is short with the small bag body 50, the adhesive layer 40 can be applied.

  (16) In the above embodiment, a penetration error detection device is provided, and when the penetration error signal is output, the operation of the finisher 60 as a whole is stopped. Therefore, although the positioning pin 85 does not penetrate the through-hole 52 and the excision device 82 cannot excise the bag 50, the bag 50 is successively conveyed to the excision device 82. There is no.

  (17) In the above embodiment, since the positioning pin 85 is formed on the male blade mold 84 and the positional relationship between the two is always fixed, the positional relationship between the male blade mold 84 and the positioning pin 85 is finely adjusted. No maintenance work is required.

In addition, the said embodiment may be changed as follows and may apply it combining the following modifications.
The folding direction of the folded adhesive portion 11 can be changed to the back sheet portion 25 side. In this case, the tip of the folded adhesive portion 11 comes into contact with the edge of the outer surface of the lower portion 25a in the back sheet portion 25.

  -The shape of the packaging bag 10 (front sheet part 20) is not ask | required. For example, the front sheet part 20 may be formed in a rectangular shape without cutting off the upper corners of the front sheet part 20. Further, the front sheet portion 20 may be formed in a tapered shape in which the width decreases toward the upper side, or a reverse taper shape in which the width increases toward the upper side, or may have a complicated shape such as a combination thereof. In addition, what is necessary is just to change the shape of the back sheet | seat part 25 and the folding sheet part 30 according to the shape of the front sheet | seat part 20. FIG. In addition, depending on the shape of each sheet part, a blank part may not be formed in the bag body 50 (packaging bag 10).

  Furthermore, the shape of the side edge bonding portion 12 of the packaging bag 10 may be asymmetrical so that the opening when the packaging bag 10 is opened is unevenly distributed in either of the width directions. For example, as shown in FIG. 10A, on the upstream side of the bag body 50, the side edge adhesive portions are arranged such that the inner edges 12c and 12d of the side edge adhesive portions 12 on both sides approach the center side in the width direction of the bag body 50. 12 is formed. And about the side edge adhesion part 12 of one side, it forms so that the inner edge 12c may be located between the folds 30a of a pair of folding sheet part 30, and about the side edge adhesion part 12 of the other side, its inner edge 12d May be formed so as to be located outside the fold line 30a. Further, only one of the inner edges of the side edge bonding portions 12 on both sides may be formed so as to approach the center in the width direction. For example, as shown in FIG. 10B, the inner edge 12c of the side edge adhesive portion 12 on one side is located between the folds 30a, and the inner edge 12d of the other side edge adhesive portion 12 is on the side of the resin sheet. You may form the side edge adhesion part 12 so that it may become linear form along an edge.

  -The formation position of the notch part 18 can be changed. For example, the cut portions 18 may be formed only in any one to three of the four side edge adhesive portions 12 of the packaging bag 10. Moreover, when forming the cut part 18 in the some side edge adhesion part 12, the relationship of the height position of the mutual cut part 18 can be set freely. Further, the cut portion 18 may be omitted without being formed. Moreover, the shape of the holding part 19 can also be changed. Not only the holding part 19 that protrudes in a semicircular shape, but may be formed so as to protrude in a triangular shape or a rectangular shape. It is possible to omit the holding part 19 without forming it.

  -The shape of the chamfered portion 17 can be changed as appropriate. For example, the chamfered portion 17 may be formed by cutting off the corner of the folded adhesive portion 11 in a straight line, or other shapes may be used. Further, the chamfered portion 17 may not be formed.

  -The shape of the lower adhesion part 13 can be changed suitably. For example, the lower adhesive portion 13 is not limited to a right triangle shape, and may be formed in an arc shape, or the length Z on the inner end 12a side of the side edge adhesive portion 12 can be changed. Further, the lower bonding portion 13 may not be formed.

  -You may adhere | attach each other so that the front sheet | seat part 20 and the back sheet | seat part 25 may be united about the periphery of the folding | returning adhesion | attachment part 11, especially a corner part. For example, a cutout or a hole is provided in the folded sheet portion 30, and the front sheet portion 20 and the backsheet portion 25 are thermally welded through the cutout or the hole, or an adhesive is provided between the opposing surfaces of the folded folded sheet portion 30. Glue with etc. An example of such a configuration is as shown in FIG. 11, and in this example, the front sheet portion 20 and the back sheet portion 25 are thermally welded via the cutout portion 11 c of the folded sheet portion 30. In the state where the folded back adhesive portion 11, particularly the front sheet portion 20 side and the rear sheet portion 25 side are separated from each other at the corner portion, either one of them may be caught by the device mechanism of the manufacturing apparatus. Then, since the folding | returning adhesion | attachment part 11, especially a corner part are integrated in one sheet form, there is no such fear.

  -In the structure which integrates the periphery of the folding | returning adhesion part 11 in 1 sheet shape, in the part which comprises the folding | returning adhesion part 11 among the folding sheet parts 30, it is on the outer surface (valley side surface) of the folding sheet part 30 of a folded state. An adhesive may be applied to integrate the corner portion of the folded adhesive portion 11 into a single sheet. In this case, the front sheet portion 20 and the back sheet portion 25 are not directly bonded, but the front sheet portion 20 and the back sheet portion 25 are integrated at the periphery (corner portion) of the folded bonding portion 11. Yes.

  -Instead of forming the packaging bag 10 with four strip-shaped resin sheets, the packaging bag 10 can also be formed with one to three resin sheets. Moreover, when forming the packaging bag 10 with 1-3 resin sheets, it is not necessary to form the side edge adhesion part 12 of four places. For example, in the case where the packaging bag 10 is formed with a single belt-shaped resin sheet, packaging is performed by forming adhesive portions on the left and right side edges of the belt-shaped resin sheet along the longitudinal direction (vertical direction of the packaging bag 10). The sealing property of the bag 10 can be ensured. Therefore, in this case, only one side edge bonding portion 12 needs to be formed. Moreover, when forming the packaging bag 10 with one strip | belt-shaped resin sheet, the adhesion part along a longitudinal direction is a corner part of the boundary of the side surface of the packaging bag 10 (in the packaging bag 10 of the said embodiment, a side edge). It may be formed at a portion where the adhesive portion 12 is formed, or may be formed at the center in the lateral width direction of the side surface of the packaging bag 10.

  -It is also possible to change the shape of the folded adhesive portion 11. For example, the folded adhesive portion 11 may be formed such that the left and right widths become smaller toward the front side (lower side in FIG. 3). In this case, the tip 11b of the folded adhesive portion 11 is the frontmost (lower side in FIG. 3) end.

  A configuration other than a resin sheet may be added to the packaging bag 10. For example, a pillar (pillar) made of a thermosetting resin is provided on the side edge of the packaging bag 10, or a mouthpiece (spout) is provided between the front sheet portion 20 and the rear sheet portion 25 in the upper edge bonding portion 14. It may be provided.

  As described above, a packaging bag in which the lower edge (bottom edge) of the resin sheet is bonded to form a folded adhesive portion, and the bottom surface portion is formed by the folded adhesive portion and the lower portion of the resin sheet. For example, the present invention can be applied to any packaging bag.

  In the above embodiment, the center in the length direction from the proximal end 11a to the distal end 11b of the folded adhesive portion 11 is adopted as the formation position (applying position T) of the adhesive layer 40, but this can be changed. For example, as illustrated in FIG. 12, the adhesive layer 40 (applying position T) can be set closer to the base end 11 a than the center line C <b> 1 between the base end 11 a and the tip end 11 b of the folded adhesive portion 11. According to this configuration, the space S can be filled on the base end 11 a side where the space S tends to be the largest between the folded adhesive portion 11 and the outer surface of the lower portion 20 a of the front sheet portion 20. That is, the adhesive layer 40 can function more suitably as a spacer member.

  In the above embodiment, a hot melt adhesive is employed as the adhesive layer 40. However, for example, a liquid adhesive may be employed, and this may be applied to the folded adhesive portion 11 with a spray or a brush to be adhered. . Further, the adhesive layer 40 is not limited to what is sold as a so-called adhesive, and a double-sided adhesive tape having adhesiveness on both sides may be adopted. Further, the front sheet portion 20 having both surfaces having heat-weldability may be adopted, and adhesion may be realized by the heat-weldability of the front sheet portion 20. That is, any configuration may be used as long as the folded bonding portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20 can be bonded.

  In the above embodiment, the adhesive layer 40 also has a function as a spacer member, but a spacer member may be provided separately from the adhesive layer 40. For example, apart from the adhesive layer 40, the space S may be filled by interposing a synthetic resin having no adhesiveness between the folded adhesive portion 11 and the outer surface of the lower portion 20 a of the front sheet portion 20. .

  -The spacer member may be omitted. For example, when the above-described liquid adhesive or double-sided adhesive tape is employed as the adhesive layer 40, it is assumed that the volume (thickness) is small, and it is difficult to function as a spacer member. Therefore, when a liquid adhesive or a double-sided adhesive tape is employed as the adhesive layer 40, the spacer member is omitted.

  -It is not necessary to adhere | attach the folding | returning adhesion part 11 and the outer surface of the lower part 20a of the front sheet | seat part 20. FIG. The leading end 11b of the folded adhesive portion 11 reaches the edge 20b on the front side of the lower portion 20a of the front sheet, and most of the weight of the packaging bag 10 acts on the folded adhesive portion 11. Accordingly, even if the folded adhesive portion 11 and the outer surface of the lower portion 20a of the front sheet portion 20 are not bonded, the tip 11b of the folded adhesive portion 11 is connected to the edge portion 20b of the lower portion 20a of the front sheet by the weight of the packaging bag 10. Abutment is possible.

  In the above embodiment, the length X from the proximal end 11a to the distal end 11b of the folded adhesive portion 11 is set to the length Z on the inner end 12a side of the side edge adhesive portion 12 in the lower adhesive portion 13 (the lower portion of the front sheet portion 20). Although formed equal to the length Z) of 20a, they need not be exactly equal. The edge portion 20b of the lower portion 20a of the front sheet portion 20 referred to in the present invention does not indicate a straight line like the fold line R, but has a certain width. Therefore, for example, even if the length X from the proximal end 11a to the distal end 11b of the folded adhesive portion 11 is formed slightly shorter or longer, the distal end 11b is in contact with the edge 20b. It can be said. In addition, although the range which can be called the edge part 20b changes also with the magnitude | size, shape, etc. of the packaging bag 10, from the edge part (part of the fold line R) of the lower part 20a, it is a side edge adhesion part in the longitudinal direction of the front sheet | seat part 20. A width of about 12 can be considered.

  The bag making machine P and the filling machine F are not limited to those exemplified in the above embodiment, and any bag making machine and filling machine that are generally used may be used. Of course, the configuration for folding the resin sheet and the configuration for forming the bonding portion may be any configuration, and the arrangement (formation order) of these device configurations is not limited. For example, the packaging bag 10 may be formed by appropriately folding 1 to 3 resin sheets, instead of forming the packaging bag 10 by four strip-shaped resin sheets. Furthermore, the bag making machine P and the filling machine F may be configured as a single bag making and filling machine, or each of the bag making machine and the filling machine may be configured by a plurality of devices.

  -The structure which raises the folding | returning adhesion part 11 of the bag body 50 is not restricted to the guide part 75 (front end surface 75a) of the front side rail part 74. FIG. For example, at least one of the rear rail portion 73 and the front rail portion 74 is formed to be curved, and is arranged so that the interval between the rear rail portion 73 and the front rail portion 74 changes as it goes from the upstream side to the downstream side. May be.

  As a guide member, a guide member separate from the front rail portion 74 may be provided. For example, in addition to the rear rail portion 73 and the front rail portion 74, a guide rail portion is provided, and the distance between the guide rail portion and the rear rail portion 73 is changed so that the folded adhesive portion 11 is attached to the guide rail portion. You may be responsible for getting up.

  In the configuration in which the guide member is provided separately from the front rail portion 74, for example, the bag body 50 is kept stationary, and the guide member moves to the rear rail portion 73 side (the back sheet portion 25 side of the bag body 50). You may make it change the space | interval of a guide member and the rear side rail part 73 by moving.

  -Although the front end surface 75a of the guide part 75 of the front rail part 74 was comprised as a vertical surface, you may comprise this as an inclined surface. For example, the front end surface 75a is an inclined surface that protrudes toward the rear rail portion 73 toward the upper portion, and the distance between the front end surface 75a and the rear rail portion 73 is made smaller toward the upper side in the vertical direction. In this case, for example, if it says in the said embodiment, since it becomes easy to insert the front end surface 75a between the lower part 20a of the front sheet | seat part 20, and the folding | returning adhesion part 11, the initial operation | movement of raising of the folding | returning adhesion part 11 is carried out. Can be executed more reliably.

  The extension length of the guide portion 75 toward the rear rail portion 73 is formed so as to gradually increase toward the downstream side in the transport direction, but the thickness length of the guide portion 75 ( You may form so that it may become large gradually as the length of an extension direction goes to the conveyance direction downstream. In this case, the most upstream end portion of the guide portion 75 in the transport direction is at the same height as the transport surface of the bag body 50 or a position slightly lower than the transport surface (in the present specification, these positions are “almost If it is referred to as “the same height position”, the initial operation of raising the folded adhesive portion 11 can be executed more reliably as in the above modified example.

  -If the folding | returning adhesion part 11 and the outer surface of the lower part 20a of the front sheet | seat part 20 are not adhere | attached, the guide part 75 and the adhesive layer provision member 79 of the front rail part 74 can be abbreviate | omitted. In this case, from the upstream side to the point Q, the front rail portion 74 can be formed in the same L-shaped section over the entire extending direction, like the rear rail portion 73.

  In the above embodiment, the glue gun 79b that discharges the hot melt adhesive of the container 79a is used as the adhesive layer applying member 79. However, this configuration may be changed. For example, the roller impregnated with the adhesive is rotated while being in contact with the folded adhesive portion 11, or the pipe material with which the adhesive is kneaded or the brush material impregnated with the adhesive is brought into contact with the folded adhesive portion 11. In this case, an adhesive layer may be applied.

  A so-called die punch method may be adopted as a cutting mode of the bag body 50 by a pair of blade molds (a male blade mold 84 and a female blade mold 86). The following configuration can be considered as the configuration of the pair of blade dies when the die punch method is employed.

  In the above-described embodiment, the adhesive layer applying member 79 is the target for applying the adhesive layer, but is not limited thereto. For example, the outer surface of the lower portion 20a of the front sheet portion 20 may be the target. Moreover, you may change so that only the outer surface of the lower part 20a of the front sheet | seat part 20 may be made into the provision object of an adhesive agent.

  As shown in FIG. 9A, a male blade mold 92 formed in a plate shape having a predetermined thickness is connected to the tip of a drive cylinder built in the base 83 of the cutting device 82 via a connecting portion 91. In addition, a female blade die 94 formed in a plate shape having a predetermined thickness is connected to the tip of another drive cylinder via a connecting portion 93. When the male blade mold 92 is viewed in plan, the lower portion 92a of the male blade mold 92 is formed so that the width in the left-right direction becomes narrower upward, and the upper portion 92b has a width in the left-right direction. It is formed substantially constant. In addition, a cut portion 92c is formed in the upper portion 92b of the male blade mold 92 so as to bite in a triangular shape toward the center in the width direction. In addition, a semicircular portion 92d is formed above the upper portion 92b of the male blade die 92 so as to project in a semicircular shape outward in the left-right direction. That is, the male blade mold 92 is formed so that the outer edge shape thereof follows the upper end 12b of the side edge bonding portion 12 and the outer end 14a of the upper edge bonding portion 14 of the packaging bag 10 to be manufactured. The female blade die 94 is formed in a plate shape having the same thickness as the male blade die 92, and a notch 95 having substantially the same shape as the outer edge shape of the male blade die 92 is formed. The male blade die 92 and the female blade die 94 are separated from each other at a position where the male blade die 92 and the female blade die 94 are spaced apart to the maximum, and the male blade die 92 is fitted into the notch 95 of the female blade die 94. Move between the matching positions.

  Further, as shown in FIG. 9A, in the female blade mold 94, a positioning pin 96 projects from the surface on the male blade mold 92 side in the separated position toward the male blade mold 92 side. The female blade mold 94 is provided with a total of three ejection holes 97, one above the notch 95 and one on each of the left and right sides of the notch 95. These ejection holes 97 are arranged at a predetermined interval with respect to the notch 95, and when the male blade mold 92 and the female blade mold 94 cut out the bag body 50, the entire opening of the ejection holes 97 is the bag body 50. The back sheet portion 25 is closed. In addition, an ejection pump is connected to each ejection hole 97 so that air is ejected to the male blade mold 92 side of the ejection hole 97. The driving of the ejection pump (air ejection) is controlled by a control device, and the ejection pump is driven after the male blade mold 92 and the female blade mold 94 reach the fitting position.

  When cutting the bag body 50 with the male blade mold 92 and the female blade mold 94, first, each drive cylinder is controlled by the control means, and the male blade mold 92 and the female blade mold 94 in the separated positions are respectively brought close to each other. To do. When the surface of the male blade mold 92 in contact with the bag body 50 and the surface of the female blade mold 94 in contact with the bag body 50 are located on the same plane, the male blade mold The bag body 50 is cut off by the outer edge of 92 and the inner edge of the notch 95 in the female blade die 94. The male blade mold 92 and the female blade mold 94 are spaced apart so that the surface on the side in contact with the bag body 50 at the cutting position is arranged on the same plane as the central surface in the thickness direction of the bag body 50 to be cut. The moving distance from the position to the excision position is set. Therefore, when the male blade mold 92 and the female blade mold 94 move from the separated position to the cutting position, the bag body 50 is pushed out in the thickness direction by the respective blade molds, and from above the rear rail portion 73 and the front rail portion 74. It will not drop out.

  Next, the drive cylinder is controlled by the control means, and the movement of the male blade mold 92 is stopped at the cutting position, while the female blade mold 94 is continuously moved to the male blade mold 92 side, and the fitting shown in FIG. Placed into position. When moving from the cut position to the mating position, the movement of the male blade mold 92 is stopped, so that the central portion 59 constituting the packaging bag 10 of the bag body 50 is not pushed out by the male blade mold 92. The bag body 50 does not fall off from the rear rail portion 73 and the front rail portion 74. On the other hand, the blank portion of the bag body 50 is pushed out to one side (left side in FIG. 9B) as the female blade mold 94 continues to move to the male blade mold 92 side. When the male blade mold 92 and the female blade mold 94 are arranged at the mating positions, the ejection pump is driven, air is ejected from the ejection holes 97 of the female blade mold 94, and the blank portion of the bag body 50 is removed. It is extracted from the positioning pin 96 of the female blade die 94 so as to be blown away.

  As shown in FIG. 9B, when the male blade mold 92 reaches the fitting position where the male blade mold 94 is fitted into the notch 95 of the female blade mold 94, the double-blade mold has a shape like one plate body. Become. And the margin part (the side edge margin part 54 is shown in figure in FIG.9 (b)) is located in the surface of one side of each blade type | mold, and the center part 59 of the bag body 50 is each Located on the other side of the blade mold. That is, in the cutting mode of the bag body 50 by this die punch method, the central portion 59 and the blank portion of the bag body 50 in the front-rear direction of the bag body 50 are moved by the amount of movement of the female blade die 94 from the cutting position to the fitting position. Are separated. Further, the central portion 59 and the blank portion are divided by each blade shape integrated in a plate shape. Therefore, it is suppressed more suitably that the blank part of the bag body 50 mixes on the rear side rail part 73 and the front side rail part 74. FIG.

  The positioning pin 85 of the male blade mold 84 can be omitted. When the blank portion of the bag body 50 is excised, the positioning pin 85 is not necessarily required when accurate positioning of the bag body 50 can be secured with a configuration other than the positioning pin 82 or when accurate positioning is not required. When the positioning pin 85 is omitted, the pin receiving hole 88 of the female blade mold 86 and the through hole 52 of the bag body 50 can be omitted, and the suction hole 89 of the female blade mold 86 can also be omitted. Furthermore, for example, when the front sheet portion 20 is formed in a square shape and it is not necessary to cut off the blank portion, the cutting device 82 itself can be omitted.

  When providing the ablation device 82, the positional relationship between the ablation device 82 and other device configurations can be changed. For example, the cutting device 82 may be provided downstream of the pressing machine 80. Further, the cutting device 82 does not have to be provided above the rear rail portion 73 and the front rail portion 74, and may be provided above the carry-in device 61 and the carry-out device 65, or a device different from the finishing machine 60. It is also possible to configure as.

  -The pressing member 80b of the pressing machine 80 may not be heatable. Even when a hot melt adhesive is employed as the adhesive layer 40, if the time from application of the adhesive layer 40 by the adhesive layer application member 79 to pressing by the pressing machine 80 is short and the molten state of the adhesive layer 40 can be ensured, pressing is performed. It is not necessary to heat the pressing member 80b of the machine 80. Further, even when an adhesive that does not need to be heated is employed as the adhesive layer 40 or when the folded adhesive portion 11 is not adhered, it is not necessary to heat the pressing member 80b of the pressing machine 80. On the contrary, if cooling is necessary to exert the adhesiveness of the adhesive, the pressing member 80b of the pressing machine 80 can be configured to be coolable.

  In the above embodiment, the bag body 50 filled with the contents and in the bag state is supplied to the finisher main body 70. However, if the bag body 50 is in the bag state, the contents are not necessarily filled. Good. For example, the bag body 50 is filled with a gas such as air or inert gas, and the bag body 50 (packaging bag 10) is filled after each process by the finishing machine body 70 is completed. You may make it fill a thing.

Next, the technical idea that can be grasped from the embodiment and the modified examples will be additionally described below.
(A) The packaging characterized in that the length from the leading edge to the leading edge of the folded adhesive portion is equal to the length from the folding leading edge to the edge of the lower outer surface on one side of the resin sheet. bag.

  (B) The side edges of the resin sheet are bonded to form a plurality of side edge bonded portions, and all the side edge bonded portions are cut for cutting off and opening a part of the resin sheet. A packaging bag in which a portion is formed.

DESCRIPTION OF SYMBOLS 10 ... Packaging bag, 10a ... Bottom part, 11 ... Folding adhesion part, 11b ... Tip of folding adhesion part, 20 ... Front sheet part, 20a ... Lower part of front sheet part, 20b ... End edge part of lower part of front sheet part, 25 ... Back sheet part, 25a ... Lower part of back sheet part, 30 ... Folded sheet part, 40 ... Adhesive layer (spacer member), 73 ... Rear rail part as guide member, 74 ... Front rail part as guide member, 75 ... Guide part of the front rail part, 79 ... Adhesive layer applying member, 80 ... Pressing machine, 80a ... Pressing member of the pressing machine.

Claims (2)

When the resin sheet is formed in a cylindrical shape and the lower edge of the resin sheet is bonded to form a folded adhesive portion, and the resin sheet is separated from each other into a bag state in which an accommodation space is formed, The lower part of the resin sheet is folded and the folded adhesive part is folded back to one side of the resin sheet disposed opposite to the bottom part to form the bottom part, and the tip of the folded adhesive part is the lower part on one side of the resin sheet A packaging bag manufacturing apparatus for manufacturing a packaging bag that is in contact with an edge of an outer surface,
After the resin sheet is in the bag state, a guide member that raises the folded adhesive portion in a direction away from the lower outer surface on one side of the resin sheet;
An adhesive layer providing member for providing an adhesive layer on the folded adhesive portion raised by the guide member;
Pressing the folded adhesive part provided with the adhesive layer back to one side of the resin sheet disposed opposite to the folded adhesive part and pressing the folded adhesive part against the lower outer surface on one side of the resin sheet packaging bag manufacturing apparatus characterized by comprising a member. The guide member is a pair of rail portions that extend from the upstream side to the downstream side and are arranged to face each other, and the distance between one rail portion and the other rail portion becomes smaller toward the downstream side. The packaging bag manufacturing apparatus according to claim 1 .

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