JP2008044641A - Gusset bag with spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a self-standing characteristic of a gusset bag with a spout. <P>SOLUTION: A gusset 1 with a spout has a bag body 2 that is constituted by a pair of opposing flat surfaces 3, a pair of side surfaces 4 arranged at both sides of these flat surfaces 3 and connected to the opposing side edges of these flat surfaces 3, and a bottom surface part 6 for closing the bottom part of the bag body 2. The side surfaces 4 can be folded toward an inside part of the bag body 2 along a folding line 5 extending in an upward or downward direction of the bag body 2. Then, the bottom surface part 6 separate from these flat surfaces 3 and side surfaces 4 is bonded to the lower end edges of the flat surfaces 3 and side surfaces 4 and the bottom surface of the bag body 2 is formed by the bottom surface part 6 into a flat surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gusset bag with a spout having a flat bottom surface, excellent self-supporting properties, and provided with a spout.

  2. Description of the Related Art Conventionally, in a gusset type package, a gusset bag with a spout is known in which a spout that communicates inside and outside is attached to an upper portion of the package. Typical examples thereof include those disclosed in Patent Document 1 and Patent Document 2. In the gusset bag with a spout disclosed in Patent Document 1 and Patent Document 2, the bottom surface of the gusset bag is sealed by sandwiching the side surface portion with the flat surface portion and bonding the lower end edge of the flat surface portion and the side surface portion to each other. Then, with respect to the pair of opposed flat portions, the position above the lower end edge by a certain dimension is folded inside the gusset bag to flatten the bottom portion of the bag body, thereby providing self-supporting properties.

JP 2002-179102 A JP 2002-328648 A

  In the gusset bag with a spout disclosed in Patent Document 1 and Patent Document 2, if the contents are sufficiently accommodated, the self-supporting property is ensured. However, when the remaining amount of the contents decreases, it becomes difficult to bend the portion that has been bent to the inside so that it functions as a bottom surface portion, so that it loses stability and does not function as a bottom surface portion.

  When the contents are used up all at once, no particular inconvenience occurs. However, if the spout cap has to be resealed in order to consume the contents gradually, self-support must be ensured even if the contents remain small.

  Therefore, the present invention provides a spouted gusset bag having high independence regardless of the remaining amount of contents.

  In order to solve such a problem in the present invention, a bag main body made of a film material and a spout attached to the bag main body to communicate the inside and the outside of the bag main body, the bag main body facing each other. A pair of plane portions, a pair of side portions disposed on both sides of the plane portions and connected to opposing side edges of the plane portions, and a bottom portion that closes the bottom of the bag body The side surface portion is provided with a folding line extending in the vertical direction of the bag body, the side surface portion is formed to be foldable toward the inside of the bag body by the folding line, and the bottom surface portion is A spout configured such that a bottom surface portion separate from the flat surface portion and the side surface portion is bonded to the lower end edge of the flat surface portion and the side surface portion, and the bottom surface of the bag body is formed flat by the bottom surface portion. With gusset bag And use.

  In the present invention, for the spouted gusset bag, the bottom surface portion is formed of a rectangular film material, and a fold line extending in the left and right direction is formed at the center portion of the bottom surface portion from both side edges of the bottom surface portion. Folding the fold diagonal line connecting the base point on the fold line located on the center side by a predetermined dimension and both corners at the side edge close to each base point so as to protrude in the same direction as the fold line, and each base point and each base point The range on the fold line with the side edge close to the fold line is bent in a direction opposite to the folding direction of the fold line to form a boat shape, and the predetermined dimension between the base point and each side edge is The side part is provided so as to correspond to the amount of folding that is folded inward by the folding line, and the bottom part of the boat shape is inserted with the folding line facing upward from below the flat part and the side part, Around Serial constituting bonded to the inner surface of the flat portion and the side portions.

  Or, at least one plane portion is folded outward at a position above the lower end edge by a certain dimension, and the side surface section is a base point located above the lower end edge of the side surface section on the folding line by a certain dimension; The folded diagonal line connecting both corners on the lower end side of the side surface portion is folded so as to protrude in the same direction as the folding line, and an open surface is formed at the bottom portion of the flat surface portion and the side surface portion. The bottom surface portion made of a rectangular film material is overlapped, and the periphery thereof is bonded to the inner surface of the flat surface portion and the side surface portion.

  According to the present invention, the bottom surface of the bag main body is configured by using another member different from both the flat surface portion and the side surface portion, and bonding the separate member to the cylinder configured by the flat surface portion and the side surface portion. Therefore, the bottom part of the bag body can be configured to be flat. For this reason, high independence can be imparted to the gusset bag with a spout regardless of the remaining amount of the contents.

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

  FIG. 1: has shown the perspective view of the gusset bag 1 with a spout concerning one Embodiment of this invention. As shown in FIG. 1, a spout-equipped gusset bag 1 includes a bag body 2 and a spout 20 that is attached to the upper end of the bag body 2 to communicate the inside and outside of the bag body 2.

  The bag body 2 includes a pair of opposing flat surface portions 3 and a pair of side surface portions 4 interposed between the flat surface portions 3 at the side edges of the flat surface portions 3. The flat surface portion 3 and the side surface portion 4 form a cylindrical body 10. A bottom surface portion 6 configured as a bottom portion of the spouted gusset bag 1 by closing the opening of the cylindrical body 10 is provided at the bottom of the cylindrical body 10 composed of the flat surface portion 3 and the side surface portion 4. ing.

  The flat portion 3 is made of a film material whose outer shape is a quadrilateral shape. On the other hand, the side surface portion 4 is provided with a folding line 5 extending in the vertical direction at the center in the thickness direction of the spouted gusset bag 1 and is folded by the folding line 5 to be folded inside the bag body 2. It is configured to be able to. In addition, this side part 4 is also comprised with the film material. And the plane part 3 and the side part 4 are mutually heat-sealed and joined, and the cylinder 10 is formed. Further, the bottom portion of the cylindrical body 10 is sealed by the bottom surface portion 6. The bottom surface portion 6 is also made of a film material having an outer shape of a square shape. The bottom surface portion 6 is overlapped with the inner surface of the lower end edge of the flat surface portion 3 and the side surface portion 4 forming the cylindrical body 10, and is heat-sealed and joined to each other.

  At the upper part of the bag body 2, a spout 20 is provided at the center in the width direction so as to protrude upward from the bag body 2. As shown in FIG. 2, the spout 20 includes a trunk portion 21 and a cylindrical mouth portion 23 arranged on the same axis as the trunk portion 21. As shown in FIG. 1, a cap 26 is detachably tightened on the outer periphery of the mouth portion 23 to open and close the mouth portion 23. The body portion 21 is formed with a sealed portion 22 that protrudes left and right. When the sealed portion 22 is attached to the bag body 2, the sealed portion 22 has a function of securing a sealing area with the bag body 2 and improving sealing performance. On the other hand, a spiral male screw portion 24 is formed on the outer peripheral surface of the mouth portion 23. A helical female screw portion formed on the inner peripheral surface of the cap 26 is engaged with the male screw portion 24. The cap 26 is detachably fastened to the mouth portion 23 by engaging a female screw portion formed on the inner peripheral surface thereof with the male screw portion 24 of the mouth portion 23. In addition, a flange portion 25 is formed at the boundary portion between the body portion 21 and the mouth portion 23 so as to be stepped up and down and project outward.

  In the spout 20 having such a configuration, the body portion 21 is sandwiched between the pair of plane portions 3 with the mouth portion 23 protruding upward from the upper end of the bag body 2, and in this state, the seal is attached to the upper end of the plane portion 3. Attached. In addition, although the spout 20 used for this embodiment has the lower part of the trunk | drum 21 formed short, you may use the type extended long from the trunk | drum 21. FIG.

  Next, several techniques for bonding the bottom surface portion 6 of the spouted gusset bag 1 to the cylindrical body 10 composed of the flat surface portion 3 and the side surface portion 4 will be described.

  3 to 5 show the first method. The case where the bottom face part 6 folded in the boat shape is used is shown. The original outer shape of the bottom surface portion 6 has a quadrangular shape as shown in FIG. First, the bottom surface portion 6 is folded at the center line to form the center fold line 7. A point at a position that is a predetermined dimension from both side edges of the bottom surface portion 6 is set as a base point P. Then, a section 8 between each base point P and both corners Q of the side edge portion closer to each base point P is folded so as to protrude in the same direction as the folding direction of the central fold line 7. Further, for the section 9 between the base point P and the side edge of the bottom surface portion 6 closer to each base point P, the central fold line 7 is folded back in the direction opposite to the original folding direction. If it does so, the bottom face part 6 which had made the square shape will be folded in a boat shape as shown in FIG.

  After the bottom surface portion 6 is folded into a boat shape, the bottom surface portion 6 is inserted into the inside from the lower end side of the cylindrical body 10 as shown in FIG. At this time, the center fold line 7 is inserted so as to face the inside of the cylinder 10. After the bottom surface portion 6 is inserted, a hot plate is pressed against the inner surfaces of the flat surface portion 3 and the side surface portion 4 constituting the cylindrical body 10 so that the periphery of the bottom surface portion 6 is heat-sealed. 6 and heat seal. In FIG. 5, the hatched part is a heat-sealed part.

  Next, an explanation will be given of a case where the bag body 2 is formed by forming the opening surface 30 on the bottom of the cylinder 10 and bonding the bottom surface portion 6 to the opening surface 30. 6 and 7 show a first method among the methods of forming the opening surface 30 on the cylindrical body 10 and bonding the bottom surface portion 6 together.

  First, with respect to the bottom portion of the cylindrical body 10 composed of the flat surface portion 3 and the side surface portion 4, one flat surface portion 3 is folded outward at a base line L1 located above the lower end by a certain dimension. Since the side edges of the plane part 3 and the side part 4 are heat-sealed, the lower part of each side part 4 is also folded as shown in FIG. The folding of the side surface portion 4 is performed as follows.

  With respect to the lower part of each side surface part 4, a point on the folding line 5 that is positioned above the lower end by a predetermined dimension is determined as a base point R. In addition, the dimension between this base point R and the lower end of the side part 4 respond | corresponds to the dimension between the lower end in the plane part 3, and the base line L1. Further, a line connecting the base point R and both corners S on the lower end side of the side surface portion 4 is a folded oblique line 31. Then, the side surface portion 4 is folded outward so that the folded oblique line 31 protrudes in the same direction as the folding line 5 of the side surface portion 4. Then, the inner surface of the flat portion 3 is exposed with respect to the region below the base line L1, and the inner surface of the side surface portion 4 is exposed with respect to the region below the base point R. The exposed inner surface of the flat surface portion 3 and the flat surface of the side surface portion 4 are configured as an opening surface 30.

  After the opening surface 30 is thus formed, the bottom surface portion 6 made of a rectangular film material is overlaid on the opening surface 30. Thereafter, the periphery of the bottom surface portion 6 and the inner surfaces of the flat surface portion 3 and the side surface portion 4 are heat sealed, and the bottom portion of the bag body 2 is sealed. In FIG. 7, the hatched portions are heat-sealed portions.

  In the embodiment shown in FIGS. 6 and 7, when the opening surface 30 is formed, only one flat surface portion 3 is folded outward, but the present invention is not limited to this. The open surface 30 may be formed by folding both the flat portions 3 outward.

  Next, with reference to FIGS. 8 and 9, a second method of forming an open surface on the bottom of the cylinder 10 and bonding the bottom is described.

  First, with respect to the cylinder 10 composed of the flat surface portion 3 and the side surface portion 4, the positions of the four corners thereof, that is, the cut portions of a certain dimension along the joint portions from the lower end portion to the joint portion between the flat surface portion 3 and the side surface portion 4 Insert 41. These cuts 41 have substantially the same depth.

  Next, with respect to each plane portion 3, a position above the lower end by a certain dimension is set as a base line L2, and a portion below the base line L2 is folded outward. Similarly, each side surface portion 4 is folded back toward the outside. The side portion 4 is turned back as follows. For each side surface portion 4, one point on the folding line 5 positioned above the lower end by a certain dimension is defined as a base point T. A line connecting the base point T and the leading end U of the cut formed in the joint portion between the flat surface portion 3 and the side surface portion 4 is referred to as a folded oblique line 42. Then, the side surface portion 4 is folded outward so that the folded oblique line 42 protrudes in the same direction as the folding line 5 of the side surface portion 4.

  In this way, by folding back the flat surface portion 3 and the side surface portion 4 to the outside, the inner surface of the flat surface portion 3 is exposed and the inner surface of the side surface portion 4 is exposed. The exposed portion is the opening surface 40. In the range below the base point T on the fold line 5, a fold line 43 is formed that is opposite to the folding direction in which the fold line 5 is folded.

  Thereafter, the bottom surface 6 made of a rectangular film material is overlaid on the opening surface 40 formed in this manner. A center fold line 7 is formed at the center of the bottom surface portion 6. When superimposing, the bottom surface portion 6 of the bottom fold line 7 coincides with the fold line 43 of the side surface portion 4 that is folded outward and forms part of the open surface 40. Thereafter, the plane portions 3 are overlapped with each other on the overlapping open surface 40 of the bottom surface portion 6, and the folded side surface portion 4 is folded in two at the position of the fold line 43. A folded state is formed and the opening surface 40 is closed. Then, the periphery of the bottom surface portion 6 is heat sealed to the inner surfaces of the flat surface portion 3 and the side surface portion 4 by pressing a seal bar from the outside of the flat surface portion 3. In FIG. 9, the hatched part is a heat seal part.

  Thereafter, the flat surface portion 3 and the side surface portion 4 projecting outward from the heat seal portion are cut off to complete the bottom portion of the bag body 2.

  In the above-described spouted gusset bag 1, the flat surface portion 3, the side surface portion 4, and the bottom surface portion 6 constituting the bag body 2 are composed of the following laminated films.

ON # 15 / DL / L-LDPE # 50-100
ON # 25 / DL / CPP # 50-100
PET # 12 / Printing / DL / ON # 15 / DL / L-LDPE # 50-100
PET # 12 / Printing / DL / ON # 15 / DL / CPP # 50-100
PET # 12 / Print / DL / AL6-12μ / DL / ON # 15 / DL / L-LDPE # 50-100
PET # 12 / Print / DL / ON # 15 / DL / AL6-12μ / DL / CPP # 50-100

  “ON” represents biaxially stretched nylon, “DL” represents dry laminate, “L-LDPE” represents linear low density polyethylene, “PET” represents polyethylene terephthalate, and “CPP” represents unstretched polypropylene. “#” Means μm.

The perspective view of the gusset bag with a spout concerning one Embodiment of this invention. The perspective view of a spout. The top view of the bottom face part which comprises a bag main body. The perspective view of the bottom part folded in the boat form. The top view which shows the state in which the bottom part was inserted in the cylinder. The perspective view which shows the opening surface and bottom face part which were formed in the bottom part of a cylinder. The perspective view which shows the state which sealed the bottom face part to the open surface. The perspective view which shows the open surface and bottom face part of another form formed in the cylinder. The perspective view which shows the state which distribute | arranged the bottom face part between the open surfaces overlapped, and was sealed to the cylinder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Spouted gusset bag 2 ... Package 3 ... Flat part 4 ... Side part 5 ... Folding line 6 ... Bottom part 7 ... Center Folding line 10 ... Cylinder 20 ... Spout 30,40 ... Open surface 31,42 ... Folded diagonal 41 ... Incision 43 ... Folding line P, R, T ... Base point L1, L2 ... Baseline

Claims (3)

A bag body made of a film material, and a spout attached to the bag body to allow communication between the inside and outside of the bag body,
The bag body includes a pair of opposed flat portions, a pair of side portions disposed on both side portions of the flat portions and connected to opposite side edges of the flat portions, and a bottom portion of the bag main body. It consists of a bottom part that closes,
The side surface portion is provided with a folding line extending in the vertical direction of the bag body, and the side surface portion is formed to be foldable toward the inside of the bag body by the folding line,
The bottom surface portion is formed by bonding a bottom surface portion separate from the flat surface portion and the side surface portion to the lower end edge of the flat surface portion and the side surface portion.
A spouted gusset bag characterized in that the bottom surface of the bag body is formed flat by the bottom surface portion. The bottom portion is made of a rectangular film material,
The bottom portion is formed with a fold line extending in the right and left at the center thereof, a base point on the fold line that is located on the center side by a predetermined dimension from both side edges of the bottom portion, and both corners on the side edges close to each base point Are folded so as to protrude in the same direction as the fold line, and the range on the fold line between each base point and a side edge close to each base point is opposite to the folding direction of the fold line. Folded into a boat shape,
And the predetermined dimension between the base point and each side edge is provided so as to correspond to the amount of folding into which the side surface portion is folded inward by the folding line,
The boat-shaped bottom surface portion is inserted from the lower side of the flat surface portion and the side surface portion with the fold line facing upward, and the periphery thereof is bonded to the inner surface of the flat surface portion and the side surface portion. The spouted gusset bag according to claim 1. At least one plane portion is folded outward at a position above the lower end edge by a certain dimension, and the side surface portion is a base point located above the lower end edge of the side surface section on the folding line by a certain dimension, and The folded diagonal line connecting both corners on the lower end side of the side surface portion is folded so as to protrude in the same direction as the folding line, and an open surface is formed at the bottom portion of the flat surface portion and the side surface portion,
The gusset bag with a spout according to claim 1, wherein a peripheral edge of the bottom surface portion made of a rectangular film material is bonded to the inner surface of the flat surface portion and the side surface portion on the open surface.

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