JP6121774B2 - Method for manufacturing pouch container with spout, and pouch container with spout - Google Patents

Description

  The present invention relates to, for example, a method for manufacturing a pouch container with a spout in which a spout is mounted on a pouch container made of a resin film, and a pouch container with a spout manufactured thereby.

  Conventionally, a pouch container with a spout having a self-supporting property is known, for example, from Patent Document 1 below. As shown in FIGS. 14 and 15 (a) to 15 (c), the pouch container SP with a spout has an upper end portion and a lower end portion of a pair of body sheet portions P11 and P12 whose both side edges are heat-sealed with a predetermined width. A spout S is attached to the top sheet portion P2 of the pouch container P in which the top sheet portion P2 and the bottom sheet portion P3 are respectively formed. Here, the top sheet portion P2 is also called a top gusset sheet, and the bottom sheet portion P3 is also called a bottom gusset. In FIG. 14 and FIG. 15, the heat-sealed portion is shown as a stippled portion.

  In the pouch container P, the upper edge portions of the body sheet portions P11 and P12 and the both side edges of the lower end portion are not heat sealed with each other, and the peripheral edge portion of the top surface sheet portion P2 is folded outward. The body sheet portions P11 and P12 are heat-sealed at the respective upper edges, and the bottom sheet portion P3 is folded inward from the lower side of the body sheet portions P11 and P12, and the peripheral edge portion thereof is The body sheet parts P11 and P12 are heat-sealed at the periphery of the lower end part. Further, as shown in FIG. 15 (b), notches c that match each other in a folded state are formed on both side edges of the bottom sheet portion P3. The side edges at the lower ends of the partial sheet portions P11 and P12 are partially heat sealed.

  Further, the spout S is filled when the pouch container P is filled with contents such as fluid or jelly-like food or medical products having fluidity, and is opened when the contents are taken out from the pouch container P. The flange portion S2 formed integrally with the cylindrical body portion S1 is heat-sealed and attached to the inner surface of the top sheet portion P2.

  The spout pouch container SP as described above is heat-sealed as shown in FIG. That is, a single packaging material M is folded and formed in a state where the pair of body sheet portions P11 and P12, the top sheet portion P2, and the bottom sheet portion P3 are connected, and is formed in the hole formed in the top sheet portion P2. The spout S is inserted, and the body sheet portions P11 and P12 and the top surface sheet portion P2 are in an upright posture so as to form a substantially T shape. In this state, the body sheet portions P11 and P12 are sandwiched between the side seal bars 21a and 21a from both sides. As a result, the side edges of the body sheet portions P11 and P12 that are the contact portions of the side seal bars 21a and 21a, the side edges of the lower end portions of the body portion sheet portions P11 and P12, and the side edges of the bottom surface seal portion P3 Is heat sealed.

  At the same time, the top seal bar 21b is pressed with the top sheet portion P2 sandwiched between the side seal bars 21a and 21a. Accordingly, the peripheral edge of the top sheet portion P2 is heat-sealed with a predetermined width to the upper edge portions of the pair of body sheet portions P11 and P12, and the flange portion S2 of the spout S is heat-sealed to the top sheet portion P2. Is attached.

International Publication No. 2008/096392 Pamphlet

  In the spout pouch container SP manufactured by heat sealing as described above, the upper corners 23 of the side seal bars 21a and 21a do not damage the film material constituting the pouch container P as shown in FIG. For this reason, or because of the manufacturing convenience of the side seal bars 21a, 21a, etc., it is formed as a slight curved surface (or chamfered portion). Therefore, even if the body sheet portions P11 and P12 of the pouch container P are sandwiched between the two side seal bars 21a and 21a and are pressed by the top seal bar 21b from above, the sides of the body sheet portions P11 and P12 are adjacent to each other. It is a part that is not joined to the seal boundary part HS3 between the edge seal part HS1 and the top face seal part HS2 between the upper edge of the body part sheet parts P11 and P12 and the periphery of the top face sheet part P2, or has a low joining strength. A defective seal portion 32 is generated.

  Therefore, in the pouch container SP with a spout that is heat-sealed as described above, as shown in FIG. 17 that is an enlarged view of the A part in FIG. 15, the top sheet part P2 is used as the body sheet part as an additional sealing step. As a state of being folded in the direction along P11, the end portion of the top sheet portion P2 in the width direction of the pouch container P is sandwiched from both sides by a point seal bar to form a rectangular point seal portion 30, which results in a poor seal The sealing of the pouch container P was improved with the joining of the portion 32 being perfect.

  However, in the pouch container SP with a spout having the point seal portion 30 formed as described above, the point seal portion 30 is a top surface seal in consideration of an accuracy error in the pressing position of the point seal bar in an apparatus for manufacturing the spout container SP. It is set so as not to protrude inward (left side in FIG. 17) from the corner K of the part HS2. In other words, in the pouch container SP with a spout, the seal corner portion K of the top surface seal portion HS2 remains in a position protruding from the point seal portion 30.

  In this case, when an impact such as a drop is applied to the pouch container SP with a spout filled with the contents, the top surface seal portion HS2 peels off starting from the corner K of the top surface seal portion HS2. An object sometimes leaked out of the container as indicated by an arrow 34. This is presumed that stress concentration occurs in the seal corner portion K2 of the top surface seal portion HS2 due to the action of pressure waves generated in the contents when the pouch container SP is dropped, and this causes separation at the seal boundary portion HS3. The

  Accordingly, an object of the present invention is to provide a pouch container with a spout having a top sheet portion to which a spout is attached, in the width direction of the side edge seal portion between the side edges of the trunk sheet portion of the spout container and the top sheet portion. It is to improve or improve the sealing performance at the seal boundary part with the top seal part between the peripheral edge of the end part and the upper edge of the body sheet part, and to suppress or prevent the leakage of the contents when the pouch is dropped. .

  The method for manufacturing a pouch container with a spout according to the present invention includes a pair of body sheet portions that are heat-sealed at predetermined widths on both side edges in the width direction, and are continuously provided between the lower ends of the pair of body sheet portions. Manufacturing a pouch container with a spout, comprising: a bottom sheet part; a pouch including a top sheet part connected to upper ends of the pair of body sheet parts; and a spout attached to the top sheet part. A method for forming a plurality of crease lines along a feeding direction while feeding a packaging material made of a long resin film, and a hole for forming a spout insertion hole in the packaging material Folding the packaging material along the crease line and forming a portion corresponding to the pair of body sheet portions, a portion corresponding to the top sheet portion, and a portion corresponding to the bottom sheet portion A folding step to be formed; A spout mounting step of mounting the spout in a spout insertion hole formed in a portion corresponding to the face sheet portion, side edges of portions corresponding to the pair of body sheet portions, and the pair of body seats The side edge of the part corresponding to the part and the side edge of the part corresponding to the bottom sheet part are heat-sealed to form a side edge seal part, and the upper edge of the pair of body part sheet parts and the top sheet Forming a top seal portion by heat-sealing the peripheral edge of the portion, and forming a seal boundary portion between the side edge seal portion and the top seal portion formed in the first seal step. In order to join the poor seal portion, a point seal member having a curved edge is pressed against the end in the width direction of the portion corresponding to the top sheet portion to curve the inner peripheral edge of the top seal portion. Heat to Comprising a second sealing step of Lumpur, and a cutting step to separate the individual spouted pouch package by cutting at a position corresponding to the side edge seal portion.

  In the method of manufacturing a pouch container with a spout according to the present invention, in the second sealing step, a portion corresponding to the top sheet portion is changed to a portion corresponding to one of the pair of body sheet portions. After pressing the point seal member in a state of being folded along, the portion corresponding to the top sheet portion is aligned with the portion corresponding to the other body sheet portion of the pair of body sheet portions. And the point seal member may be pressed again against the same region.

A pouch container with a spout which is another aspect of the present invention is provided in a row between a pair of body sheet parts whose both side edges in the width direction are heat-sealed with a predetermined width, and between each lower end part of the pair of body part sheet parts. A pouch container with a spout, comprising: a pouch including a bottom sheet portion formed; and a pouch including a top sheet portion connected to upper ends of the pair of body sheet portions; and a spout attached to the top sheet portion. A side edge seal portion that is a joint portion between the side edges of the pair of body portion seat portions, and a ceiling that is a joint portion between each upper edge of the pair of body portion seat portions and the peripheral edge of the top surface sheet portion. has a point seal portion locally heat sealed sealing boundary portion including a seal failure portion occurring between the face seal portion, by the point seal portion, wherein the end portion in the width direction of the front SL top sheet portion The shape of the inner peripheral edge of the top seal is bay Are those formed in the curved.

  In the pouch container with a spout according to the present invention, the inner peripheral edge portion of the point seal portion having a curved shape at the end portion in the width direction of the top sheet portion eliminates a sealing corner portion formed at the seal boundary portion. Thus, it is preferable that it is located inside the width direction with respect to the seal corner.

  According to the method for manufacturing a spouted container and a spouted pouch container according to the present invention, the inner peripheral shape of the top seal part at the widthwise end of the top sheet part is formed in a curved shape by the point seal part. Thus, the seal shape has no seal corner. Thereby, even if the pressure applied to the contents by the impact when the spouted container is dropped acts on the seal boundary part, the top sheet part and the body sheet part start from the seal corner of the top seal part. Can be prevented from peeling off. Therefore, the leakage of the contents when the spouted container is dropped can be suppressed or prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the pouch manufacturing apparatus with which the manufacturing method of the pouch container with a spout which is embodiment of this invention (henceforth only called a "pouch container" suitably) is implemented. It is a perspective view of a pouch container which is an embodiment of the present invention. It is a top view of the packaging material in which the crease line and the through-hole were formed. It is a figure which shows a mode that a packaging material is folded and a pouch container is formed. FIG. 5 is a view subsequent to FIG. 4 showing a state in which the packaging material is folded to form a pouch container. It is a figure following FIG. 5 which shows a mode that a packaging material is folded and a pouch container is formed. It is a figure following FIG. 6 which shows a mode that a packaging material is folded and a pouch container is formed. It is a figure which shows a mode that a pouch container is heat-sealed by a 1st sealing process, (a) is a side view, (b) is a top view. It is a figure which shows the state after the unnecessary part of the top | upper surface sheet | seat part of a pouch container was excised. It is a longitudinal cross-sectional view which shows the pouch container after a 1st sealing process. It is a figure which shows a mode that a point seal | sticker part is formed in the 2nd sealing process in the pouch container connected continuously, (a) is a point seal bar from a near side, (b) is the top | upper surface sheet | seat part turned up It is a figure which shows a mode that a point seal bar is pressed from the back side. It is a front view of the cut pouch container. It is the B section enlarged view in FIG. It is a perspective view which shows the conventional pouch container. It is (a) top view, (b) front view, and (c) EE sectional view of a conventional pouch container. It is a figure which shows the 1st sealing process of the conventional pouch container. It is the A section enlarged view in Fig.15 (a).

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  In the following description, the same or similar reference numerals are used for the same components described in relation to the conventional pouch container SP, and redundant descriptions may be omitted with the aid of the same.

  FIG. 1 is a diagram schematically showing an overall configuration of a pouch manufacturing apparatus 10 for manufacturing a pouch container SP with a spout. The pouch manufacturing apparatus 10 includes a reel unit 11 around which a packaging material M, which is a raw resin film, is wound, an accumulator unit 12 that is a buffer mechanism for feeding the packaging material M from the reel unit 11, and a packaging material. A crease line forming unit 13 for forming a crease line in M, a hole forming unit 14 for forming a through hole in the packaging material M by punching, a folding unit 5 for folding the packaging material M along the crease line, and a folded package A spout supply unit 16 that supplies the spout S to the material M and temporarily mounts it, a first joining unit 17 that performs a first sealing process on the packaging material M on which the spout S is temporarily mounted, and a top surface outer shape of the pouch container SP A cutting unit 18 for cutting off unnecessary portions to form a mold, and a second joining unit for locally heat-sealing the sealing boundary portion HS3 of the pouch container SP. It includes a 19, by cutting the packaging material M and a cutting unit 20 which separates the individual pouch package SP.

  FIG. 2 is a perspective view of the pouch container SP of the present embodiment. In FIG. 2, the arrow W indicates the width direction, the arrow H indicates the up-down direction, and the arrow D indicates the depth direction.

  The pouch container SP of the present embodiment has substantially the same configuration as the above-described conventional pouch container. That is, the pouch container SP includes a pair of body sheet parts P11 and P12 (only one body sheet part P11 is shown in FIG. 2) facing each other and each of the pair of body sheet parts P11 and P12. A top sheet portion P2 that is connected to the upper end portion to form the top surface of the pouch container SP, and a bottom portion of the pouch container SP that is connected to the respective lower end portions of the pair of body sheet portions P11 and P12. A bottom sheet portion P3 and a spout S serving as an entrance for the contents of the pouch container SP are provided.

  A pair of trunk | drum sheet | seat part P11, P12 is mutually joined by the side edge seal part HS1 formed in the both-sides edge of the width direction of the pouch container SP which corresponds to the conveyance direction of the packaging material M. FIG. Each lower end edge part of a pair of trunk part sheet parts P11 and P12 and the peripheral edge of bottom sheet part P3 are joined by bottom seal part HS4. Each upper edge part of a pair of trunk | drum sheet | seat part P11, P12 and the peripheral part of the top | upper surface sheet | seat part P2 are joined by the top | upper surface seal | sticker part HS2. Further, the spout S is mounted with the flange portion S2 being heat-sealed at the center position in the width direction of the top sheet portion P2. Furthermore, notches c are formed on both side edges of the bottom sheet portion P3 so as to coincide with each other in a folded state, and at the lower end portions of the trunk sheet portions P11, P12 via the notches c. Both side edges are partially joined.

  In these respects, the pouch container SP of the present embodiment has the same configuration as the conventional one described above. However, the present embodiment is different in that the inner peripheral edge portion 40 of the top surface seal portion HS2 at the end in the width direction of the top surface sheet portion P2 is formed in a curved shape. This difference will be described in detail later.

  The packaging material M used for the pouch container SP of the present embodiment is usually composed of a resin film. This resin film is required to have basic performance as a package, such as impact resistance, wear resistance, and heat resistance. Moreover, since each said seal | sticker part HS1-HS4 is formed by heat seal, heat seal property is also requested | required of the resin film.

  As the resin film, a multilayer sheet having a base film layer and a sealant layer that imparts heat sealability is suitable. When high gas barrier properties and light shielding properties are required, the base film layer and the sealant layer It is preferable to provide a barrier layer between them. In addition, you may provide barrier property to the base film layer itself.

  Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are exemplified. In addition, lamination | stacking of these each layer can be performed by the conventional lamination method, for example, the dry lamination by an adhesive agent, the heat lamination which adhere | attaches with a heat | fever by pinching | interposing a heat bonding layer.

  Examples of the film constituting the base film layer include polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), etc. Further, a sealant layer serving as an adhesive layer by heat sealing is used. Examples of the constituting film include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), etc. Further, as the barrier layer, a metal thin film such as aluminum, Alternatively, a resin film such as vinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH), or any synthetic resin film (for example, a base film layer) may be formed of aluminum, aluminum oxide or silica. Inorganic acids such as Such as deposition (or sputtering) films can be exemplified ones.

  Next, with reference to FIGS. 3 to 13, the manufacturing process of the pouch container SP of the present embodiment will be described sequentially.

  FIG. 3 is a plan view of the packaging material M in which crease lines and through holes are formed. First, a plurality of crease lines are formed on the packaging material M delivered from the reel unit 11. In the present embodiment, for example, six crease lines L1 to L6 are formed in parallel to each other along the packaging material delivery direction. Each of the crease lines L1 to L6 can be formed in the crease line forming unit 13 by contacting a thin crease line forming roller while rotating it.

  Here, in the packaging material M in which the crease lines L1 to L6 are formed, a belt-like region from one edge portion (upper edge portion in FIG. 3) to the crease line L1 constitutes the top sheet portion P2 of the pouch container SP. The belt-like region from the crease line L1 to the crease line L3 becomes a portion constituting one body sheet portion P11 of the pouch container SP, and the belt-like region from the crease line L3 to the crease line L5 serves as the bottom sheet portion P3. A belt-like region from the crease line L5 to the other edge becomes a portion constituting the other body sheet portion P12.

  In the present embodiment, a case where a large number of pouch containers SP are manufactured in a row from a single packaging material M will be described. However, a large number can be obtained by cutting a single packaging material in half along the delivery direction. Productivity may be improved by making the pouch containers SP connected in two rows.

  After the crease lines L1 to L6 are formed, a plurality of through holes are formed in the packaging material M by the hole forming unit 14 by, for example, punching. Specifically, circular through holes H serving as spout insertion holes are formed at predetermined intervals in a portion corresponding to the top sheet portion P2. The interval between the through holes H substantially corresponds to the width of the manufactured pouch container SP.

  Further, a pair of through-holes h is formed in the portion that becomes the bottom sheet portion P3 in the packaging material M along the planned cutting line CL from which the individual pouch containers SP are separated. This through hole h becomes a semicircular cutout c when the pouch container SP is cut and separated, and joins the lower side edges of the pair of body portion sheet portions P11 and P12.

The packaging material M in which the crease lines L1 to L6 and the through holes H are formed as described above is folded along the crease lines L1 to L6 when moving downstream and passing through the folding unit 15. It will be in the state shown in.

  When FIG. 4 is referred, the part used as a pair of trunk | drum sheet | seat part P11, P12 is folded so that it may oppose in the state which pinched | interposed the bottom sheet | seat part P3 folded in two. Moreover, the part used as the top | upper surface sheet | seat part P2 is folded by the crease line L2, and is folded in the state which stood up along one trunk | drum sheet | seat part P11. And the upper end part of the part used as the other trunk | drum sheet | seat part P12 is bend | folded at substantially right angle by the crease line L6, and is made into the state extended along the horizontal direction (for example, horizontal direction).

  Subsequently, the packaging material M is conveyed to the spout supply unit 16. Here, as shown in FIG. 5, the spout S is supplied sideways, and as shown in FIG. 6, the spout S is inserted in the direction of the arrow through the spout insertion hole H formed in the portion that becomes the top sheet portion P <b> 2. . At this time, the main body portion S1 of the spout S protrudes from the portion that becomes the top sheet portion P2 to the opposite side, but since the flange portion of the spout S is formed to have a larger diameter than the spout insertion hole H, the spout insertion hole. It will be in the state engaged with the peripheral part of H.

  As shown in FIG. 7, the packaging material M temporarily attached with the spout S in this way has a portion in which the top sheet portion P <b> 2 becomes a posture along the horizontal direction while moving to the next first joining unit 17. It is folded and opposes each upper part of the part used as trunk | drum sheet | seat part P11, P12 currently bent along the horizontal direction by crease line L2, L6.

  In this state, as shown in FIG. 8A, the packaging material M has the body sheet portions P11 and P12 that are heated by the side seal bars 21a and 21a in the first joining unit 17 from both lateral sides. While being sandwiched, the heated top seal bar 21b descends and the peripheral portion of the top sheet portion P2 and the flange portion S2 of the spout S are sandwiched between the side seal bars 21a and 21a.

  As a result, the side edge seal portion HS1 and the bottom seal portion HS4 are formed by heat sealing by the side seal bars 21a and 21a, and the top seal portion HS2 is formed by heat sealing by the top seal bar 21b, and at the same time, the flange of the spout S The part S2 is heat-sealed and attached to the top sheet part P2.

  At this time, the pouch container SP of the present embodiment has the top sheet portion P2 formed in a substantially octagonal shape. Therefore, as shown in FIG. A square top seal portion HS2 is formed. In addition, as described with reference to FIG. 17, the poor seal portion 32 that is not bonded or has a low bonding strength remains in the seal boundary portion HS3 between the side edge seal portion HS1 and the top seal portion HS2. Yes.

  Subsequently, the packaging material M is conveyed to the excision unit 18 where the triangular portions 41 between the portions that become the top sheet portion P2 of the pouch container SP adjacent in the width direction are disposed on both sides of the packaging material M. The triangle-shaped cutting blade arranged on the oscillating is rocked and cut. As a result, as shown in FIG. 9, when separated, the top sheet portion P2 of the pouch container SP is shaped so as to form a substantially octagonal shape.

  FIG. 10 shows a cross section taken along line FF in FIG. The cross section of the packaging material M at this stage is the same as that of the pouch container described in the related art.

  In the present embodiment, an example in which the shape of the top sheet portion P2 of the pouch container SP is a substantially octagonal shape will be described. However, the present invention is not limited to this, and the top sheet portion is rectangular, hexagonal, or the like. Other polygonal shapes may be used, or other shapes such as a circle, an ellipse, a rhombus, and a trapezoid may be used.

After the unnecessary part is cut off by the cutting unit 18, the packaging material M is conveyed to the second joining unit 19. In this case, as shown in FIGS. 11 (a) and 11 (b), in a state where a plurality of pouch containers SP are connected by a cutting line CL, the seal boundary portion HS3 (see FIG. 13) including the poor seal portion 32 is provided . By locally pressing the point seal bar 21c in two point seal steps, the point seal portion 42 having the inner peripheral edge 40 curved in a substantially arc shape is formed.

  Specifically, as shown in FIG. 11 (a), first, a heated point seal in a state in which the top sheet portion P2 is folded along a portion corresponding to the body sheet portion P11 on the near side in the depth direction. The bar 21c is pressed against the end of the top sheet portion P2 of the packaging material M. At this time, the heated point seal bar 21c may be pressed while sandwiching the packaging material M from both sides in the depth direction, or in a state where the contact member is in contact with the back surface side of the packaging material M. The point seal bar 21c thus made may be pressed against the top sheet portion P2 from the front side.

  The tip surface of the point seal bar 21, that is, the end surface pressed against the packaging material M, has a taper shape in which the upper part is wide in a substantially rectangular shape in the vertical direction and the outer edge of the intermediate part is curved in a concave shape on both sides. The lower part is narrower than twice the width w of the side edge seal part HS1 when separated into individual pouch containers SP. By making such a shape, the point seal portion 42 is prevented from protruding into an unsealed portion (that is, a portion serving as an accommodation space for the pouch container SP) between the body sheet portions P11 and P12.

  After the first point sealing process is performed in this way, as shown in FIG. 11B, the top sheet portion P2 is along the crease lines L2 and L6 so that the top sheet portion P2 is along the back body sheet portion P12. Wrapped. In that state, the point seal bar 21c heated to the same region as the first point seal portion is pressed again as the second point seal step.

  In this way, the point seal bar 21c is formed at the seal boundary portion HS3 including the defective seal portion 32, so that the defective seal portion 32 is sufficiently joined and sealed, and as a result, separated individually. The sealing strength at the seal boundary portion HS3 of the pouch container SP is improved.

  The packaging material M on which the point seal is applied in the second joining unit 19 as described above moves to the cutting unit 20 which is the next station, and is cut along the planned cutting line CL, thereby individual pouches. The container SP is separated from the packaging material M. Thereby, the pouch container SP of this embodiment is completed.

  FIG. 12 is a plan view showing one pouch container SP in the present embodiment, and FIG. 13 is an enlarged view of a portion A in FIG.

  As shown in FIG. 12, in the pouch container SP of the present embodiment, the inner peripheral edge portion 40 of the top surface seal portion HS2 at the end in the width direction of the top surface sheet portion P2 is formed in a curved shape curved in a substantially arc shape. Yes. More specifically, as shown in FIG. 13, a curved portion 40a indicated by a one-dot chain line in the inner peripheral edge portion 40 of the top seal portion HS2 is formed in the first point sealing step, and a curved portion 40b indicated by a two-dot chain line. Is formed in the second point sealing step. By connecting these curved portions 40a and 40b, a substantially arc-shaped inner peripheral edge portion 40 is formed.

  The curved portions 40a and 40b formed in the first and second point seal steps are both inside in the width direction from the seal corner portion K so as to eliminate the seal corner portion K formed in the seal boundary portion HS3. That is, it is located on the side close to the spout S. Thereby, even if the pressure by the contents acts on the seal boundary portion HS3 due to an impact such as when the pouch container SP filled with the contents is dropped, the top surface sheet starts from the seal corner portion K of the top surface seal portion HS2. It is possible to suppress separation of the part P2 and the body part sheet parts P11 and P12HS. Therefore, the leakage of contents when the pouch container SP is dropped can be suppressed or prevented.

  The two curved portions 40a and 40b are preferably continuous so as to be in contact with each other. However, as described above, if the seal corner portion K is covered with the point seal portion 42 and there is no portion that becomes a separation start point due to stress concentration. Since the peeling prevention effect at the seal boundary portion HS3 can be expected, as shown in FIG. 13, the two curved portions 40a and 40b may intersect at an intersection 44 that forms an obtuse angle.

  The pouch container SP of this embodiment and the pouch container shown in FIG. 14 which is a comparative example were filled with contents, and a drop test was performed. In this test, the pouch container SP is dropped from the position of 1 meter in height five times each with the bottom sheet portion P3 facing downward and the trunk sheet portion P11 (or P12) facing downward. The contents were leaked from the point-sealed part. As a result, in the pouch container of the comparative example, the contents leaked out from the point seal portion 42, but in the present embodiment, the contents did not leak out, and the effect could be confirmed.

  In addition, the manufacturing method of the spout container according to the present invention is not limited to the above-described embodiment and its modifications, and various changes and modifications within the scope and equivalents described in the claims of the present application are possible. Improvements are possible.

  For example, in the above description, the process of heat-sealing and attaching the spout S to the top surface sheet portion P2 and the heat sealing step of forming the top surface seal portion HS2 on the periphery of the top surface sheet portion P2 have been described. However, it is not limited to this, and may be performed as a separate process.

Moreover, in the above, although it demonstrated as forming the substantially circular arc-shaped inner peripheral edge part 40 in the width direction edge part of the top | upper surface seal | sticker part HS2 by two point sealing processes, it is not limited to this, You may form by one point seal process. Specifically, a portion corresponding to the top sheet portion P2 of the packaging material M that has moved to the second joining unit 19 is bent along the horizontal direction, and a portion that is point-sealed in this state is a valley at the seal boundary portion HS3. Fold it and fold it into a V shape. Then, the portion to be point-sealed is sandwiched from both sides of the packaging material M by the point-sealing portion 21c and heat-sealed, so that only one point-sealing step is required. If it does in this way, the 2nd junction unit 19 can be made into a compact and comparatively simple composition.

  DESCRIPTION OF SYMBOLS 10 Pouch manufacturing apparatus, 11 reel unit, 12 accumulator unit, 13 crease line forming unit, 14 hole forming unit, 16 spout supply unit, 17 1st joining unit, 18 cutting unit, 19 2nd joining unit, 20 cutting unit, 21a , 21a Side seal bar, 21b Top seal bar, 21c Point seal member, 23 (Upper corner of side seal bar), 30, 42 Point seal, 32 Seal failure, 40 (Inner seal) 40a, 40b Curved part, 41 Unnecessary part, c Notch part, CL cutting planned line, H spout insertion hole, h through hole, HS1 side edge seal part, HS2 top face seal part, HS3 seal boundary part, HS4 bottom part seal part , K seal corner, L1-L6 crease line, M wrapping material P pouch container, P11, P12 body sheet part, P2 top sheet part, P3 bottom sheet part, S spout, S1 body part, S2 flange part, p pouch container with SP spout, W width direction, H vertical direction, D depth direction.

Claims (4)

A pair of body sheet parts whose both side edges in the width direction are heat-sealed with a predetermined width, a bottom sheet part connected between lower ends of the pair of body part sheet parts, and the pair of body sheet A method of manufacturing a pouch container with a spout comprising a pouch including a top sheet portion continuously provided at an upper end portion of the section, and a spout attached to the top sheet portion,
A crease line forming step of forming a plurality of crease lines along the sending direction while sending a packaging material made of a long resin film,
A hole forming step of forming a spout insertion hole in the packaging material;
A folding step of folding the packaging material along the crease line to form a portion corresponding to the pair of body sheet portions, a portion corresponding to the top sheet portion, and a portion corresponding to the bottom sheet portion. When,
A spout mounting step of mounting the spout in a spout insertion hole formed in a portion corresponding to the top sheet portion;
Heat seal the side edges of the parts corresponding to the pair of body sheet parts, the side edges of the parts corresponding to the pair of body sheet parts, and the side edges of the part corresponding to the bottom sheet part. Forming a side edge seal portion, and heat-sealing the upper edge of the pair of body sheet portions and the peripheral edge of the top surface sheet portion to form a top surface seal portion;
In order to join a defective seal portion formed at a seal boundary portion between the side edge seal portion and the top surface seal portion formed in the first sealing step, a point seal member having a curved edge portion is provided. A second sealing step of heat-sealing the inner peripheral edge of the top surface seal portion in a curved shape by pressing against the width direction end of the portion corresponding to the top surface sheet portion;
A cutting step of cutting into individual pouch containers with a spout by cutting at a position corresponding to the side edge seal portion,
The manufacturing method of the container with a spout containing. In the manufacturing method of the pouch container with a spout of Claim 1,
In the second sealing step, the point seal member is folded in a state in which a portion corresponding to the top sheet portion is folded along a portion corresponding to one of the pair of body sheet portions. After pressing, the portion corresponding to the top sheet portion is folded back along the portion corresponding to the other body sheet portion of the pair of body sheet portions, and the point seal member is pressed again into the same region. A method of manufacturing a pouch container with a spout, which includes applying. A pair of body sheet parts whose both side edges in the width direction are heat-sealed with a predetermined width, a bottom sheet part connected between lower ends of the pair of body part sheet parts, and the pair of body sheet A pouch container with a spout comprising a pouch including a top surface sheet portion continuously provided at the upper end of the portion, and a spout attached to the top surface sheet portion,
A side edge seal portion that is a joint portion between side edges of the pair of body portion seat portions, and a top surface seal portion that is a joint portion between each upper edge of the pair of body portion seat portions and the periphery of the top surface sheet portion. It has a point seal portion locally heat sealed sealing boundary portion including a seal failure portion generated between the,
By the point seal portion, the inner peripheral edge shape of the top surface seal portion in the width direction end portion of the front SL top sheet portion is formed in a curved curvilinear,
Pouch container with spout. In the pouch container with a spout according to claim 3,
The inner peripheral edge portion of the point seal portion having a curved shape at the end portion in the width direction of the top surface sheet portion is wider than the seal corner portion so as to eliminate the seal corner portion formed at the seal boundary portion. Located inside,
Pouch container with spout.

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