JP5969451B2 - Method for manufacturing self-supporting packaging bag with side gusset - Google Patents

Description

  The present invention includes a front side sheet, a back side sheet, a side gusset, and a bottom sheet, and when the contents are stored, the front side sheet, the back side sheet, the side gusset, and the bottom sheet are unfolded and can be self-supported. The present invention relates to a method for manufacturing a self-supporting packaging bag.

  Conventionally, it has a front side sheet, a back side sheet, a side gusset, and a bottom sheet, and when the contents are stored, the front side sheet, the back side sheet, the side gusset, and the bottom sheet can unfold and become self-supporting. Some methods of manufacturing packaging bags include a side gusset sheet production line and a package body production line. In the side gusset production line, the side gusset sheet material is cut to a predetermined length, Is folded and a pair of triangular portions facing the bottom side are formed, and the side gusset sheet is continuously manufactured and supplied to the package manufacturing line (see, for example, Patent Document 1).

Japanese Patent No. 4436521

  However, in the thing of the above-mentioned patent document 1, when inferior goods generate | occur | produce at the time of manufacturing the sheet for side gusset in the sheet production line for side gussets, since inferior goods will be supplied to a package body production line as it is. As it is, a package that is a defective product was formed. In addition, the side gusset sheet is bonded to the front sheet and the back sheet on both sides, so that one sheet of side gusset serves as a side gusset for two packages. The side gusset sheet resulted in two defective packages and increased costs.

  Further, since the side gusset sheet is continuously manufactured on the side gusset sheet manufacturing line and is supplied to the package body manufacturing line, the side gusset sheet manufacturing line is adapted to the manufacturing speed of the side gusset sheet manufacturing line. Since it was necessary to adjust the production speed, it took time, and the production speed of the package production line could not be increased.

  Accordingly, the present invention provides a method for manufacturing a self-supporting packaging bag with side gussets that can prevent a defective product sheet for side gussets from being supplied to a packaging body production line and reduce manufacturing costs. It is an object.

In order to achieve the above object, the method of manufacturing a self-supporting packaging bag with side gussets according to the present invention is folded in half with the mountain fold portion facing the inside of the bag, and a triangular flap portion folded in a triangular shape on the bottom side The two sides of the front side sheet and the back side sheet are respectively connected through a pair of side gussets, and the bottom side of the front side sheet, the bottom side of the back side sheet, and the triangular flap part of the side gusset The bottom sheet, which is folded in half along the folded shape of the triangular flap part, is connected to form the front sheet, the back sheet, the side gusset, and the bottom sheet when the contents are accommodated. In the method for manufacturing a self-supporting packaging bag with side gusset, the manufacturing line of the self-supporting packaging bag with side gusset includes a sheet manufacturing line for side gusset and A side wall gusset sheet production line, the bottom side of the belt-shaped side gusset sheet folded in a folding manner with the non-thermal adhesive layer facing inward and the thermal adhesive layer facing outward. Folded to form a pair of opposing triangular parts, and the side parts of the side gusset and the side gusset sheet manufacturing process, in which the hypotenuses of the triangular parts are arranged in parallel to the center line of the Kannon folding Side gusset sheet inspection process for inspecting side gusset sheet, defective side gusset sheet removal process for removing defective products, side gusset sheet after removal of defective products, with the folded triangular part side up A sheet feeding process for side gussets that is sequentially sent to the packaging body production line toward the packaging body production line. A first sheet material forming step, wherein the first sheet material forming one of the sheet and the back sheet is sent to the bag making machine with the thermal adhesive layer on the upper surface and the non-thermal adhesive layer on the lower surface, and the side gusset A sheet placement step for side gussets, wherein the sheet for side gussets fed by the sheet feeding step for sheets is sequentially placed on the upper surface of the first sheet material at a predetermined interval and temporarily bonded, and the front side sheet and the back side The second sheet material forming one of the other sheets was placed on the upper surface of the first sheet material in the side gusset sheet placing step with the non-thermal adhesive layer facing the upper surface and the thermal adhesive layer facing the lower surface. From the bag upper side of the side gusset sheet, it passes between the fold-in-fold part of the side gusset sheet and the bag upper side half of the pair of triangular parts, and extends over the front end of the bag upper side half. Said Forming the bottom sheet on the upper surface of the pair of triangular portions of the side gusset sheet after the second sheet material feeding step, the second sheet material feeding step for feeding and temporarily adhering to cover the side gusset sheet A bottom sheet material feeding step for temporarily bonding the bottom sheet material to the bottom surface material by feeding the thermal adhesive layer to the lower surface and the non-thermal adhesive layer to the upper surface, and folding the upper half of the bag of the triangular portion toward the lower half of the bag At the same time, a bottom folding step of folding the upper half of the bottom sheet material temporarily bonded to the upper surface of the triangular portion toward the lower half, and the triangular portion and the bottom folded in half A sheet, a bottom bonding step of heat-sealing and bonding the first sheet material and the second sheet material, a center-folded center portion of the side gusset sheet, and the first sheet material Comprising a side joining step of joining the serial second sheet material heat-sealed to, the cutting step for cutting the widthwise central portion of the side heat-sealed portion formed by the side portion joining step, the side gusset The sheet feeding step for storing the side gusset sheet in a feeding member, and the feeding member includes a frame that surrounds a lower surface, an anti-triangular side, and both sides of the side gusset sheet, and an upper portion of the frame. A first cylinder member that can be moved up and down and moved back and forth, adsorbs the side gusset sheet, and sends out the sheets one by one to the packaging body production line; and a second side that arranges the side portions of the side gusset sheet A cylinder member and a third cylinder member for adjusting a triangular portion side of the side gusset sheet, and the side gusset sheet housed in the frame is formed in the frame. It is characterized by being fed while maintaining the obtained state.

Furthermore, both sides of the front side sheet and the back side sheet are folded through a pair of side gussets that are folded in half with the mountain folds facing the inside of the bag and are triangularly folded on the bottom side. Connected to each other, the bottom side of the front sheet, the bottom side of the back sheet, and the triangular flap part of the side gusset are connected by a bottom sheet folded in two along the folding shape of the triangular flap part In the manufacturing method of the self-supporting packaging bag with side gusset, the front side sheet, the back side sheet, the side gusset, and the bottom sheet can be unfolded when the contents are stored. The mold packaging bag production line includes a side gusset sheet production line, a bottom sheet production line, and a package body production line. The sheet manufacturing line is folded in a triangular shape on the bottom side of a belt-shaped side gusset sheet folded in a non-thermal adhesive layer on the inside and the thermal adhesive layer on the outside to form a pair of opposing triangular portions. The side gusset sheet manufacturing process in which the hypotenuse of the triangular portion is arranged in parallel to the center line of the guanyin fold, and the side gusset sheet manufactured in the side gusset sheet manufacturing process A sheet inspection process, a defective side gusset sheet removing process for removing defective products, and a side gusset sheet after removing defective products are sequentially sent to the packaging body production line with the folded triangular part side facing up. A sheet feeding process for side gussets, and the bottom sheet production line includes the bottom sheet cut according to the size of the bottom. The bottom sheet inspection process for removing the defective product, the defective bottom sheet removing process for removing the defective product, and the bottom sheet after removing the defective product with the non-thermal adhesive layer on the upper surface and the thermal adhesive layer on the lower surface. A bottom sheet feeding step that sequentially feeds the first sheet material forming one of the front side sheet and the back side sheet with the thermal adhesive layer on the upper surface and the non-thermal adhesive layer on the lower surface. The first sheet material feeding step for feeding to the bag making machine and the side gusset sheet fed by the side gusset sheet feeding step are sequentially placed on the upper surface of the first sheet material at predetermined intervals. A side gusset sheet placing step to be temporarily bonded, and a second sheet material forming one of the front side sheet and the back side sheet, the non-thermal adhesive layer on the upper surface and the thermal adhesive layer on the lower surface From the bag upper side of the side gusset sheet placed on the upper surface of the first sheet material in the side gusset sheet placement step, the side folding part of the side gusset sheet and the pair of triangular parts A second sheet material feeding step in which the sheet is passed between the upper half of the bag and fed over the tip of the upper half of the bag so as to cover the side gusset sheet and temporarily bonded; and the bottom sheet A bottom sheet placing step of placing the bottom sheet fed out in the sending step on the upper surfaces of the pair of triangular portions of the side gusset sheet and temporarily bonding them; and a bag upper side half of the triangular portion At the same time as folding back to the lower half side, the bottom folding step of folding the upper half of the bottom sheet temporarily bonded to the upper surface of the triangular portion toward the lower half, and the two before folding Triangular part and the bottom sheet, a bottom part joining step for joining the first sheet material and the second sheet material, a center part of the side gusset sheet that has been folded, and the first sheet material and the first sheet. comprising a side bonding step of bonding the second sheet material heat-sealed to, the cutting step for cutting the widthwise central portion of the side heat-sealed portion formed by the side portion joining step, the sheet for the side gusset The feeding step stores the side gusset sheet in a feeding member, and the feeding member is disposed above the frame body, a frame body that surrounds the lower surface, the anti-triangle part side, and both side parts of the side gusset sheet. A first cylinder member that can move up and down and move back and forth, sucks the side gusset sheet, and feeds the sheet to the package manufacturing line one by one; and a side portion of the side gusset sheet A state in which the second cylinder member to be arranged and a third cylinder member to arrange the triangular portion side of the side gusset sheet are arranged, and the side gusset sheet accommodated in the frame body is arranged in the frame body It is characterized by being sent out while maintaining .

  According to the method for manufacturing a self-supporting packaging bag with a side gusset of the present invention, the side gusset sheet manufacturing line inspects the side gusset sheet manufacturing process for manufacturing the side gusset sheet, and the manufactured side gusset sheet. Side gusset sheet inspection process, defective side gusset sheet removal process for removing defective products, and side gusset sheet delivery process for sequentially sending the side gusset sheets after removal of defective products to the packaging body production line Therefore, it is possible to always send an appropriate side gusset sheet to the packaging body production line, and to increase the yield at the time of production and to reduce the cost.

  In addition, since only the stocked proper sheet for side gusset is supplied to the package body production line, inspection items on the package body production line can be reduced. Furthermore, unlike the conventional case, it is not necessary to adjust the production speed of the packaging body production line in accordance with the production speed of the side gusset sheet production line, and the production speed of the packaging body production line can be increased. It does not take time.

  Furthermore, in addition to the side gusset sheet production line and the package production line, a bottom sheet production line is provided, and the bottom sheet production line includes a bottom sheet inspection process for inspecting the bottom sheet cut according to the size of the bottom. Since it has a defective bottom sheet removing process for removing defective products and a bottom sheet sending process for sequentially sending the bottom sheet after removing defective products to the package manufacturing line, an appropriate bottom sheet is always provided in the package manufacturing line. The manufacturing yield can be increased and the cost can be reduced. In addition, since the bottom sheet after removal of defective products is sent out one by one to the packaging body production line and placed on the upper surface of the pair of triangular portions of the side gusset sheet, it covers the front sheet, the back sheet, and the bottom sheet. When decorating, the bottom sheet, the front sheet and the back sheet can be easily matched.

It is the schematic of the manufacturing line of the self-supporting packaging bag with a side gusset which shows the 1st example of this invention. It is the schematic of the sheet production line for side gusset similarly. It is a front view of the sheet | seat for side gussets similarly. It is explanatory drawing of the sheet | seat delivery process for side gussets similarly. It is explanatory drawing of a 2nd sheet material sending process similarly. It is a section explanatory view of the sheet material in the case of the 2nd sheet material sending out process similarly. It is a section explanatory view of a sheet material in the case of a bottom part folding process similarly. It is a front view of a self-supporting packaging bag with a side gusset. It is the schematic of the manufacturing line of the self-supporting packaging bag with a side gusset which shows the 2nd form example of this invention. It is explanatory drawing of the state which interposed the anti-fusion material between the Kannon folding part of the sheet | seat for side gussets, and the bag upper side half body of a triangular part. It is a cross-sectional explanatory drawing of the sheet | seat material at the time of inserting the anti-fusion material between the Kannon folding part of the sheet for side gussets and the bag upper side half of the triangular part. It is the schematic of the manufacturing line of the self-supporting packaging bag with a side gusset which shows the 3rd form example of this invention. It is the schematic of a bottom part sheet manufacturing line similarly. It is explanatory drawing of a bottom part sheet sending out process similarly. It is the schematic of the manufacturing line of the self-supporting packaging bag with a side gusset which shows the 4th form example of this invention.

  1 to 8 are views showing a first embodiment of a method for manufacturing a self-supporting packaging bag with side gussets according to the present invention. The manufacturing line for the self-supporting packaging bag with side gussets includes a sheet manufacturing line 10 for side gussets and The package body production line 20 is provided.

  In the side gusset sheet production line 10, as shown in FIG. 2, first, in the side gusset sheet production process 11, a band-like sheet folded in a lap-topped manner with the non-thermal adhesive layer facing inward and the thermal adhesive layer facing outward. The material is cut into a predetermined length, and one end side, which is the bottom surface side of the bag, is folded into a triangular shape to form a pair of opposing triangular portions 1b, 1b on the upper part of the folding folds 1a, 1a. , 1b of the side gusset sheet 1 as shown in FIG. 3 is continuously manufactured by arranging the hypotenuses 1c, 1c in parallel with the center line CL1 of the fold-in part.

  Next, as shown in FIGS. 2 and 3, the side gusset sheet 1 is inspected by the side gusset sheet inspection process 12, and then the defective products are removed by the defective side gusset sheet removal process 13. The sheets are sequentially sent to the package manufacturing line 20 by the sheet sending process 14.

  In the side gusset sheet delivery step 14, first, the side gusset sheet 1 after removal of defective products is stored in the delivery member 14a with the folded triangular portion 1b facing upward. As shown in FIGS. 2 and 4, the delivery member 14a is disposed above the frame body 14b, the frame body 14b surrounding the lower surface of the side gusset sheet 1, the bag bottom surface side, and both side portions, and moves up and down. The first cylinder member 14c that can move back and forth, adsorbs the side gusset sheet 1 and sends it to the packaging body production line 20 one by one, and is disposed on the side of the frame 14b, and the side of the side gusset 1 The second cylinder member 14d for adjusting the side and the third cylinder member 14e for adjusting the triangular portion 1b side of the side gusset seat 1 arranged on the side of the frame body 14b are provided. While being maintained in the frame body 14b, the sheets are fed one by one to the packaging body production line 20.

  In the package body production line 20, as shown in FIG. 1, first, in the first sheet material delivery step 21, the back sheet 2 (the first sheet material of the present invention) is placed on the upper surface with the thermal adhesive layer as the non-thermal adhesive layer. Is sent to the bag making machine with the bottom facing down. Next, the side gusset sheet 1 manufactured in the side gusset sheet manufacturing line 10 is placed on the upper surface of the back sheet 2 sent out in the first sheet material delivery process 21 by the side gusset sheet placement process 22. In the sheet feeding step 14, the sheets are sequentially placed at predetermined intervals and temporarily bonded by the first vertical seal bar 22a.

  Next, in the second sheet material feeding step 23, the front sheet 3 (second sheet material of the present invention) is placed on the side gusset sheet placing step 22 with the non-thermal adhesive layer facing the upper surface and the thermal adhesive layer facing the lower surface. Then, from the bag upper side of the side gusset sheet 1 placed on the upper surface of the back side sheet 2, as shown in FIG. 1 and FIG. 5, the folds 1a and 1a of the side gusset sheet 1 and a pair of triangles The second vertical seal is sent out so as to cover the side gusset sheet 1 over the front end portions of the bag upper side halves 1d, 1d by passing between the bag upper side halves 1d, 1d of the parts 1b, 1b. Temporary bonding is performed by the bar 23a. At the time of this temporary bonding, the upper surface of the front side sheet 3 that passes between the folding folds 1a, 1a and the bag upper side halves 1d, 1d of the pair of triangular portions 1b, 1b faces each other. Since it is folded back and heat-sealed, there is no possibility that the folded front side sheets 3 are joined.

  Next, as shown in FIG. 1 and FIG. 6, the bottom sheet material is delivered onto the upper surface of the pair of triangular portions 1 b and 1 b of the side gusset sheet 1 after the second sheet material delivery process by the bottom sheet material delivery process 24. 4 is sent out with the thermal adhesive layer on the lower surface and the non-thermal adhesive layer on the upper surface, and is temporarily bonded by the third vertical seal bar 24a. Next, as shown in FIG. 1 and FIG. 7, when the bag upper side half 1d and 1d of the triangular portions 1b and 1b are folded back to the bag lower side half through the folding guide member 25a by the bottom folding step 25. At the same time, the upper half portion of the bottom sheet material 4 temporarily bonded to the upper surfaces of the triangular portions 1b and 1b is folded in half toward the lower half portion side, and is formed by the folding presser roll 25b.

  Next, in the bottom joining step 26, the front side sheet 3, the folded triangular parts 1b and 1b and the bottom sheet material 4, and the back side sheet 2 are joined by heat-sealing with the lateral seal bar 26a, In the part joining step 27, the center part of the folding doors 1a, 1a of the side gusset sheet 1, the front sheet 3 and the back sheet 2 are heat-sealed and joined by the fourth vertical seal bar 27a. Next, in the cutting step 28, the widthwise central portion of the side heat seal portion 28a formed in the side joining step 27 is cut while being trimmed, and the self-supporting packaging bag 5 with side gusset as shown in FIG. Is formed.

  The self-supporting packaging bag 5 with side gussets manufactured in this way is cut through the side gussets 1e and 1e formed by cutting the side gusset sheet 1 at the center line CL1 of the fold-in-fold part in the cutting step 28. The both sides of the front side sheet 3 and the back side sheet 2 are joined. The side gusset 1e is arranged in a folded state with the mountain fold part 1f facing the bag inside, and a triangular flap part 1g formed by the triangular part 1b is arranged on the bottom side. On the bottom side of the front side sheet 3 and the back side sheet 2, a bottom sheet 6 formed by cutting the bottom sheet material 4 joined to the triangular flaps 1g, 1g by the bottom joining process 26 in the cutting process 28 is piled up. The folded portion 6a is joined in a folded state with the bag facing the inside. Thereby, when the contents are accommodated in the bag, the front side sheet 3, the back side sheet 2, the side gussets 1e, 1e, and the bottom sheet 6 are developed, and can become independent.

  In the manufacturing method of the self-supporting packaging bag with side gussets of the present embodiment, as described above, the manufacturing line of the self-supporting packaging bag with side gusset includes the sheet manufacturing line 10 for the side gusset and the package manufacturing line 20. Since the side gusset sheet 1 is manufactured and inspected on the side gusset sheet manufacturing line 10, only the appropriate side gusset sheet 1 is sent to the package manufacturing line 20, thereby increasing the manufacturing yield. Thus, the cost can be reduced, and the inspection items of the package body production line 20 can be reduced.

  Furthermore, unlike the prior art, it is not necessary to adjust the production speed of the package body production line 20 in accordance with the production speed of the side gusset sheet production line 10, and the production speed of the package body production line 20 can be increased. No need to adjust the speed.

  FIGS. 9 to 15 show other embodiments of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. .

  9 to 11 show a second embodiment of the present invention. In the package manufacturing line 20 of the present embodiment, first, as in the first embodiment, the first sheet material feeding step 21 and the side gusset. After the sheet placement step 22 is performed, the bottom sheet material delivery step 24 performs an upper surface of the pair of triangular portions 1b, 1b of the side gusset sheet 1 delivered in the side gusset sheet placement step 22. The bottom sheet material 4 is sent out with the thermal adhesive layer on the lower surface and the non-thermal adhesive layer on the upper surface, and is temporarily bonded by the second vertical seal bar 24b.

  At the time of this temporary bonding, as shown in FIGS. 10 and 11, the side gusset sheet 1 is fold-folded with the thermal adhesive layer facing outward, so the fold-in folding portions 1a, 1a and the triangular portion In order to prevent the bag upper side halves 1d and 1d of 1b and 1b from being joined, it is possible to melt between the Kannon folding parts 1a and 1a and the bag upper side halves 1d and 1d of the triangular parts 1b and 1b. Wear prevention material 24c is interposed.

  Next, a bottom folding process 25 is performed, and then, in the second sheet material feeding process 23, the side gusset sheet 1 in a state where the triangular portion 1 b and the bottom sheet 6 are folded in two, and the upper side of the back sheet 2 After the front side sheet 3 is sent out and temporarily bonded by the third vertical seal bar 23b, the bottom part joining step 26, the side part joining step 27, and the cutting step 28 are performed as in the first embodiment, and a side gusset is attached. A self-supporting packaging bag 5 is formed.

  FIGS. 12 to 14 show a third embodiment of the present invention. The production line for the self-supporting packaging bag with side gussets of this embodiment includes a side gusset sheet production line 10, a bottom sheet production line 30, and FIGS. The package body production line 20 is provided.

  As shown in FIGS. 13 and 14, the bottom sheet production line 30 is inspected by the bottom sheet inspection process 31, after the bottom sheet 6 cut to the size of the bottom is inspected, and then by the defective bottom sheet removal process 32. Then, the defective product is removed, and then the bottom sheet 6 is sequentially sent out to the package body production line 20 in the bottom sheet sending process 33.

  In the bottom sheet delivery step 33, first, the bottom sheet 6 after removal of defective products is stored in the delivery member 33a with the non-thermal adhesive layer facing upward and the thermal adhesive layer facing downward. As shown in FIG. 14, the delivery member 33 a is disposed above the bottom surface 6, the bottom surface of the bag, the four sides of the bag 33, and the frame 33 b, and can be moved up and down and moved back and forth. And the cylinder member 33c that adsorbs 6 and feeds it to the package body production line 20, and the stocked bottom sheet 6 is fed to the package body production line 20 one by one by the cylinder member 33c.

  In the package manufacturing line 20 of the present embodiment, after the first sheet material delivery step 21 and the second sheet material delivery step 23 are performed, the bottom sheet material delivery step 24 performs the second operation similarly to the first embodiment. The bottom sheet 6 manufactured by the bottom sheet manufacturing line 30 is placed on the upper surface of the pair of triangular portions 1b, 1b of the side gusset sheet 1 after the sheet material feeding process, and the thermal adhesive layer is placed on the lower surface by the bottom sheet feeding process 33. The non-thermal adhesive layer is sent out toward the upper surface, and temporarily bonded by the third vertical seal bar 24a. Next, as in the first embodiment, a bottom folding process 25, a bottom bonding process 26, a side bonding process 27, and a cutting process 28 are performed to form the self-supporting packaging bag 5 with a side gusset.

  In this embodiment, the packaging body production line 20 includes the side gusset sheet production line 10, the bottom sheet production line 30, and the packaging body production line 20. Therefore, the side gusset sheet 1 is a side gusset. After being manufactured and inspected in the sheet manufacturing line 10, only the appropriate side gusset sheet 1 is sent to the packaging body manufacturing line 20, and the bottom sheet 6 is manufactured and inspected in the bottom sheet manufacturing line 30. Later, since only the appropriate bottom sheet 6 is sent to the packaging body production line 20, it is possible to increase the production yield and reduce the cost, and to reduce the inspection items of the packaging body production line 20. be able to. Furthermore, when decorating over the front sheet 3, the back sheet 2, and the bottom sheet 6, it is possible to easily perform pattern matching between the bottom sheet 6, the front sheet 3, and the back sheet 2.

  FIG. 15 shows a fourth embodiment of the present invention. As in the third embodiment, the manufacturing line for the self-supporting packaging bag with side gusset includes a side gusset sheet manufacturing line 10 and a bottom portion. A sheet manufacturing line 30 and a package manufacturing line 20 are provided.

  In the package body production line 20, first, similarly to the first embodiment, after the first sheet material delivery step 21 and the side gusset sheet delivery step 14 are performed, the bottom sheet material delivery step 24 performs side gadget use. The bottom sheet 6 manufactured by the bottom sheet manufacturing line 30 is placed on the top surface of the pair of triangular portions 1b, 1b of the sheet 1 by the bottom sheet feeding step 33 with the thermal adhesive layer facing the bottom surface and the non-thermal adhesive layer facing the top surface. It is fed out and temporarily bonded by the second vertical seal bar 24b. At the time of this temporary bonding, similarly to the second embodiment, the joint folding portions 1a, 1a of the side gusset sheet 1 and the bag upper side halves 1d, 1d of the triangular portions 1b, 1b are prevented from being joined. In order to do this, the anti-fusing material 24c is interposed between the kannon folding parts 1a and 1a and the bag upper side halves 1d and 1d of the triangular parts 1b and 1b.

  Next, as in the second embodiment, a bottom folding process 25, a second sheet material feeding process 23, a bottom bonding process 26, a side bonding process 27, and a cutting process 28 are performed in order, and the self-supporting packaging bag 5 with side gussets. Is formed.

  The present invention is not limited to each of the above-described embodiments, and a self-supporting type with a side gusset with a chuck is used that has a chuck portion that meshes with each other on the bag opening side of the front sheet and the back sheet. Packaging bags can also be manufactured. Moreover, a decoration part can also be suitably provided in a front side sheet | seat, a back side sheet | seat, a bottom part sheet | seat, and a side gusset.

DESCRIPTION OF SYMBOLS 1 ... Sheet | seat for side gussets, 1a ... Kannon folding part, 1b ... Triangle part, 1c ... Oblique side, 1d ... Half upper bag side, 1e ... Side gusset, 1f ... Mountain fold part, 1g ... Triangle flap part, 2 ... Back side Sheet 3, front sheet 4, bottom sheet material, 5 self-supporting package with side gusset, 6 bottom sheet, 6 a mountain fold, 10 side gusset sheet production line, 11 side gusset sheet production Step 12: Sheet inspection process for side gusset, 13 ... Sheet removal process for defective side gusset, 14 ... Sheet feeding process for side gusset, 14a ... Delivery member, 14b ... Frame body, 14c ... First cylinder member, 14d ... First 2 cylinder members, 14e ... 3rd cylinder member, 20 ... packaging body production line, 21 ... 1st sheet sending process, 22 ... side gusset sheet Placement step, 22a ... first vertical seal bar, 23 ... second sheet material delivery step, 23a ... second vertical seal bar, 23b ... third vertical seal bar, 24 ... bottom sheet material delivery step, 24a ... third vertical Seal bar 24b 2nd vertical seal bar 24c Fusion prevention material 25 Bottom folding process 25a Folding guide member 25b Folding presser roll 26 Bottom bonding process 26a Horizontal seal bar 27 Side joining step, 27a ... fourth vertical seal bar, 28 ... cutting step, 28a ... side heat sealing part, 30 ... bottom sheet production line, 31 ... bottom sheet inspection step, 32 ... defective bottom sheet removing step, 33 ... Bottom sheet delivery step, 33a ... delivery member, 33b ... frame, 33c ... cylinder member

Claims (2)

The front and back sheets are connected to each other via a pair of side gussets that are folded in half with the mountain fold facing the inside of the bag and a triangular flap that is folded into a triangle on the bottom side. And connecting the bottom side of the front sheet, the bottom side of the back sheet, and the triangular flap part of the side gusset with a bottom sheet folded in two along the folding shape of the triangular flap part. In the method of manufacturing a self-supporting packaging bag with side gussets that is formed and can self-support when the contents are stored and the front side sheet, the back side sheet, the side gusset, and the bottom sheet are unfolded,
The production line of the self-supporting packaging bag with side gusset includes a sheet production line for side gusset, and a packaging body production line.
The side gusset sheet manufacturing line is formed by folding a bottom side of a band-shaped side gusset sheet folded in a triangular shape with the non-thermal adhesive layer on the inside and the thermal adhesive layer on the outside, and a pair of opposing triangular portions. Forming the hypotenuse of the triangular portion parallel to the center line of the guanyin fold,
A side gusset sheet inspection process for inspecting the side gusset sheet manufactured in the side gusset sheet manufacturing process;
A sheet removal process for defective side gussets to remove defective products;
A side gusset sheet feeding step for sequentially feeding the side gusset sheet after removal of defective products to the packaging body production line with the folded triangular portion side facing up, and the packaging body production line includes the front side A first sheet material forming step for sending the first sheet material forming either one of the sheet and the back sheet to the bag making machine with the thermal adhesive layer on the upper surface and the non-thermal adhesive layer on the lower surface;
A side gusset sheet placement step of temporarily placing the side gusset sheets sent out by the side gusset sheet delivery step on the upper surface of the first sheet material at predetermined intervals and temporarily bonding them;
The second sheet material forming one of the front side sheet and the back side sheet is arranged such that the non-thermal adhesive layer faces the upper surface and the thermal adhesive layer faces the lower surface. From the bag upper side of the side gusset sheet placed on the upper surface, the bag upper side half is passed between the side folding part of the side gusset sheet and the bag upper side half of the pair of triangular portions. A second sheet material feeding step for feeding and temporarily adhering the side gusset sheet over the tip of the body;
The bottom sheet material forming the bottom sheet is disposed on the upper surface of the pair of triangular portions of the side gusset sheet after the second sheet material feeding step, with the thermal adhesive layer facing the lower surface and the non-thermal adhesive layer facing the upper surface. A bottom sheet material feeding step for feeding and temporarily bonding;
At the same time as folding the upper half of the triangular portion of the bag toward the lower half of the bag, the upper half of the bottom sheet material temporarily bonded to the upper surface of the triangular portion is folded in half toward the lower half. A bottom folding process,
A bottom joining step of heat-sealing and joining the triangular part and the bottom sheet folded in half, and the first sheet material and the second sheet material;
A side joining step of heat-sealing and joining the center portion of the side gusset sheet folded and the first sheet material and the second sheet material;
A cutting step of cutting the central portion in the width direction of the side heat seal portion formed in the side bonding step ,
In the side gusset sheet delivery step, the side gusset sheet is accommodated in a delivery member, and the delivery member includes a frame body that surrounds a lower surface, an anti-triangular side, and both sides of the side gusset sheet, A first cylinder member disposed above the body, capable of moving up and down and back and forth, adsorbing the side gusset sheet, and feeding the sheet to the packaging body production line one by one; and a side portion of the side gusset sheet A state in which the second cylinder member to be arranged and a third cylinder member to arrange the triangular portion side of the side gusset sheet are arranged, and the side gusset sheet accommodated in the frame body is arranged in the frame body The manufacturing method of the self-supporting packaging bag with a side gusset characterized by being sent out while maintaining .
The front and back sheets are connected to each other via a pair of side gussets that are folded in half with the mountain fold facing the inside of the bag and a triangular flap that is folded into a triangle on the bottom side. And connecting the bottom side of the front sheet, the bottom side of the back sheet, and the triangular flap part of the side gusset with a bottom sheet folded in two along the folding shape of the triangular flap part. In the method of manufacturing a self-supporting packaging bag with side gussets that is formed and can self-support when the contents are stored and the front side sheet, the back side sheet, the side gusset, and the bottom sheet are unfolded,
The production line of the self-supporting packaging bag with side gusset includes a side gusset sheet production line, a bottom sheet production line, and a package production line.
The side gusset sheet manufacturing line is formed by folding a bottom side of a band-shaped side gusset sheet folded in a triangular shape with the non-thermal adhesive layer on the inside and the thermal adhesive layer on the outside, and a pair of opposing triangular portions. Forming the hypotenuse of the triangular portion parallel to the center line of the guanyin fold,
A side gusset sheet inspection process for inspecting the side gusset sheet manufactured in the side gusset sheet manufacturing process;
A sheet removal process for defective side gussets to remove defective products;
A sheet feeding step for side gussets that sequentially sends the sheet for side gussets after removal of defective products to the packaging body production line with the folded triangular side facing the upper surface;
The bottom sheet production line is a bottom sheet inspection process for inspecting a bottom sheet cut according to the size of the bottom,
A defective bottom sheet removing step for removing defective products;
A bottom sheet after the defective product removal, and a bottom sheet feeding step of sequentially feeding the non-thermal adhesive layer on the upper surface and the thermal adhesive layer on the lower surface to the packaging body production line,
The packaging body production line sends a first sheet material forming one of the front side sheet and the back side sheet to a bag making machine with a thermal adhesive layer on an upper surface and a non-thermal adhesive layer on a lower surface. Material feeding process;
A side gusset sheet placement step of temporarily placing the side gusset sheets sent out by the side gusset sheet delivery step on the upper surface of the first sheet material at predetermined intervals and temporarily bonding them;
The second sheet material forming one of the front side sheet and the back side sheet is arranged such that the non-thermal adhesive layer faces the upper surface and the thermal adhesive layer faces the lower surface. From the bag upper side of the side gusset sheet placed on the upper surface, the bag upper side half is passed between the side folding part of the side gusset sheet and the bag upper side half of the pair of triangular portions. A second sheet material feeding step for feeding and temporarily adhering the side gusset sheet over the tip of the body;
A bottom sheet placing step for placing the bottom sheet sent out by the bottom sheet feeding step on the upper surface of the pair of triangular portions of the side gusset sheet and temporarily bonding them;
The upper half of the bag of the triangular portion is folded back to the lower half of the bag, and at the same time, the upper half of the bottom sheet temporarily bonded to the upper surface of the triangular portion is folded in two toward the lower half. Bottom folding process,
A bottom part joining step of joining the triangular part and the bottom sheet folded in two, the first sheet material and the second sheet material;
A side joining step of heat-sealing and joining the center portion of the side gusset sheet folded and the first sheet material and the second sheet material;
A cutting step of cutting the central portion in the width direction of the side heat seal portion formed in the side bonding step ,
In the side gusset sheet delivery step, the side gusset sheet is accommodated in a delivery member, and the delivery member includes a frame body that surrounds a lower surface, an anti-triangular side, and both sides of the side gusset sheet, A first cylinder member disposed above the body, capable of moving up and down and back and forth, adsorbing the side gusset sheet, and feeding the sheet to the packaging body production line one by one; and a side portion of the side gusset sheet A state in which the second cylinder member to be arranged and a third cylinder member to arrange the triangular portion side of the side gusset sheet are arranged, and the side gusset sheet accommodated in the frame body is arranged in the frame body The manufacturing method of the self-supporting packaging bag with a side gusset characterized by being sent out while maintaining .

Images