KR101206125B1 - Packaging bag - Google Patents

Abstract

The performance regarding the protection of the contents can be improved, and a packaging bag that is difficult to be broken can be efficiently produced.

With respect to the packaging bag 1 in which the mold member 20 is disposed inside the bag main body 2 and the outer shape is held in a hexahedron, the bag 8 is provided on the bottom part 8 thereof. The film material 3 comprised as the main body 2 is overlapped multiple times. That is, with respect to the portion which forms the cylinder 50 and is pushed out of the mold member 20, the portion pushed out of the side forming portions 23 and 24 is formed in a base line corresponding to the lower end of the mold member 20. In addition to being folded to the center side of the packaging bag, the packaging bag 1 is pushed out of the starting point corresponding to the inner edge of the lower end sealing portion 41 in the center of the front-back direction and from the side surface forming portions 23 and 24. Fold diagonal lines connecting the vertices corresponding to the lower ends of the mold members at the front and rear end edges of the outgoing part so as to be convex in the inside of the packaging bag, and triangular folds surrounded by these base lines and diagonal lines The portion 61 and the portion pushed out from the planar forming portions 21 and 22 are bent to the center of the packaging bag 1 with the lower end of the mold member 20 as a base line, and the triangular folding portion 61 Fold into the plane formed by The base 60 is formed, and the bottom sealing part 41 which seals the lower end of the protrusion part is formed, and these are overlapped.

Description

Packing bag {PACKAGING BAG}

1 is a perspective view of a packaging bag according to one embodiment of the invention.

FIG. 2 is a developed view of a packaging bag before the packaging bag shown in FIG. 1 is manufactured. FIG.

FIG. 3 is a cross-sectional view showing an example of a fastener attached to the packaging bag shown in FIG. 1. FIG.

4 is a perspective view showing a state in which a film member is made normal by bending a mold member from the state shown in FIG. 2.

The perspective view of the cylinder which shows the formation process of a bottom face part.

The perspective view of the cylinder which shows the formation process of a bottom part.

FIG. 7 is an explanatory diagram showing a state in which film members are overlapped in the formed bottom portion; FIG.

FIG. 8 is an explanatory diagram showing a state in which a film material is overlapped in a bottom portion of a conventional packaging bag. FIG.

9 is a perspective view of a cylindrical body with a bottom portion completed;

The perspective view of the cylinder which shows the formation process of an upper surface part.

The perspective view of the cylinder which shows the formation process of an upper surface part.

12 is a developed view of a packaging bag according to another embodiment.

The figure which shows an example of the process of attaching a fastener and a mold member to a film material at the time of mass-production of a packaging bag.

* Explanation of the symbols of the main parts of the drawings

1: packing bag 2: bag body

3: film ash 7: upper surface part

8: bottom 10: fasteners

20, 20a: mold member 21, 22: planar forming portion

23 and 24: side forming portion 25: bending line

26: bottom forming portion 31: upper protrusion

33: lower protrusion 32, 34: sealing area

35, 36: sealing area 40: longitudinal sealing part

41: lower seal 42: upper seal

50: cylinder 60: flat folding portion

61: triangular fold portion 70: plane bent portion

71: triangular protrusion 73: polymerized portion

The present invention relates to a packaging bag in which a mold member for maintaining the shape of the bag in a cube is disposed inside the bag body.

DESCRIPTION OF RELATED ART Conventionally, the packaging bag with a fastener attached to the inner surface of an opening so that an opening can be resealed is known. In recent years, with respect to such packaging bags, there is an increasing demand to store them in packaging bags without destroying the shape of the contents. The patent applicant of this invention is progressing research and development in order to satisfy such a request until now, and has already disclosed this invention in patent document 1.

The invention described in Patent Literature 1 is a packaging bag provided with a bag main body composed of a film material and a mold member provided inside the bag main body to maintain an outer shape of the bag main body in a hexahedron shape. It is about. When manufacturing the packaging bag of this patent document 1, it forms mainly by folding | folding one film material in two at the center line, and bonding the edges to each other.

And the flat part and the side part of a packaging bag are formed by the tension | tensile_strength provided by the mold member provided in the inside of the film material which forms the bag main body. On the other hand, the part corresponding to each planar part in the part pushed out from the upper end of the mold member is bent to the center, and the triangular part corresponding to each side part is folded back to the bottom face side, It is formed by being sealed to the outer surface of the side surface. And the bottom part of a packaging bag is formed by bending the triangular protrusion part formed in the both sides part to the center side of a packaging bag, and sealing it to the outer side surface of a bottom part.

(Patent Document 1)

Japanese Patent Application Laid-Open No. 2001-322187

The invention described in Patent Literature 1 has a feature that allows the mold member to be accommodated inside without breaking down the shape of the contents because the mold member maintains the outer shape of the bag main body. And the applicant of this application further improves productivity, reduces the collapse of a mold, and the protection performance of the content with respect to the packaging bag which attached this mold member, even after starting invention of patent document 1. Research has been conducted on improvement, reduction of damage to packaging bags, and the like.

As a result of this study, the present invention provides a packaging bag which can improve the protection performance of the contents and can efficiently manufacture a packaging bag that is difficult to be broken as compared with a conventional packaging bag.

MEANS TO SOLVE THE PROBLEM In this invention, in order to solve the said subject, the bag main body which consists of a film material formed in one rectangular shape, and a pair of planar parts sealed to the inner surface of this bag main body and opposing the external shape of this bag main body, these A hexahedron-shaped member consisting of a pair of side portions opposed to both sides of the flat portion, an upper surface portion, and a bottom portion facing the upper surface portion, and a fastener attached to the upper surface portion to enable resealing after opening the upper surface portion. The said mold member is arrange | positioned so that the plane formation part and side surface formation part corresponding to a pair of said planar part and a pair of said side part may alternately adjoin, and these each part is the bending line which parallels mutually. Bent by the edges of the planar forming portion forming the opposite edges of the mold member and end edges of the side forming portions In the long bag, the bag body arranges the mold member inward, bonds the inner surfaces of both edges of the film member to a predetermined width while bending the mold member at the bend line, and the upper end of the mold member. Cylinders are formed by forming upper and lower protrusions protruding from the lower end, respectively, and film planes are drawn to the planar forming portion and the side forming portion of the mold member to form the planar portion and the side surface portion, respectively. The upper protrusion of the cylinder is folded to form the upper surface portion, the lower protrusion of the cylinder is folded to form the bottom surface portion, and when forming the cylinder, a vertical seal portion which bonds the side edges of the film material to this packaging It is formed so that it may extend up and down in one side of the flat part of a bag, The said bottom face part is from the lower end of the said lower protrusion part. The lower end sealing part of which a certain width | variety part was sealed, and the part which protrudes downward from the side part in the said lower protrusion part are folded in the center side of this packaging bag in the base line corresponding to the lower end of the said mold member, An oblique line connecting a starting point corresponding to the inner edge of the lower end sealing portion in the center of the front and rear directions of the packaging bag and a vertex corresponding to the lower end of the mold member at the front and rear end edges of the portion pushed out from the side surface portion. ) Is folded inside the packaging bag so as to be convex, and a triangular fold portion surrounded by these base lines and diagonal lines and a portion pushed out from the flat portion in the lower protrusion portion are used as base lines of the lower end of the mold member. Bent to the center of the bag and having a flat fold formed on the triangular fold; The lower end sealing portion is pushed out of each of the central sealing portions that seal the inner surfaces with respect to the portions corresponding to the starting point in the portions pushed out from the flat portion, and from the respective flat portions on both sides of the central sealing portion. The side sealing part which sealed the inner surface of the site | part and the site | part which pushed out from each side surface was respectively comprised, and this side sealing part employ | adopted the packaging bag comprised by sealing mutually opposing each other in the front-back direction.

Moreover, in the packaging bag which concerns on this invention, in addition to said structure, the site | part which protrudes upwards from each planar part in the said upper protrusion part is centered on the upper end of the said mold member to the center in addition to the said structure. A bent flat bent portion and a triangular protrusion bent such that a portion protruding upward from each side portion protrudes left and right in a triangular shape with the upper end of the mold member as a base line, and these flat bent portions and triangular protrusions In the upper side of the packaging bag, the inner side facing each other when the upper protrusion is folded in the center of the front-back direction of the packaging bag, and a superimposed portion sealing the upper edge of the polymerized portion, the polymerized portion is In addition to being folded back to the back side of the packaging bag, the triangular protrusion is folded so as to overlap with the outer surface of each of the corresponding side portions. It is formed and characterized in that configured.

Moreover, the said vertical sealing part is formed in the back side of this packaging bag among the said flat parts, and is formed so that it may follow one side edge of this back surface.

Moreover, in this invention, with respect to such a packaging bag, the said mold member is characterized in that the bottom face formation part which protrudes from the lower end of each planar formation part, and is bendable with respect to each planar formation part is formed, respectively.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1: shows the perspective view of the packaging bag 1 which concerns on one Embodiment of this invention, and FIG. 2 has shown the expanded view of the packaging bag 1 shown in FIG. The packaging bag 1 is a bag main body 2 composed of a film material 3 and a mold member disposed inside the bag main body 2 to maintain the outer shape of the bag main body 2 in a hexahedron shape. 20 is provided. Since it is held in the cube by the mold member 20, the packaging bag 1 has a pair of flat parts 4 and 5 which oppose back and forth, a pair of side parts 6 which oppose left and right, and an upper surface which opposes up and down. The part 7 and the bottom face part 8 are comprised. The fastener 10 is attached to the upper surface portion 7 so that the opened portion can be resealed after the upper surface is opened.

The pair of opposing planar portions 4 and 5 is pulled in all directions by the mold member 20 disposed inside the bag main body 2 to form a rectangular shape. Similarly, the pair of opposing side portions 6 are stretched in all directions by the mold member 20 to form a rectangular shape. Moreover, in the flat part 4, 5, the back part 5 which forms the back side of this packaging bag 1 is provided with the vertical sealing part 40 which overlapped the inner surface of the sealing area, and sealed both. . This vertical sealing part 40 is formed so that it may extend up and down of the packaging bag 1 along the boundary line of the back part 5 and the side part 6. With respect to these flat parts 4 and 5 and the side part 6, the upper surface part 7 and the bottom face part 8 fold the film material 3 which comprises the bag main body 2 by the predetermined method. It is formed by being put.

The details of the structure of the packaging bag 1 will be easily understood with reference to the manufacturing process thereof. Therefore, the structure of the packaging bag 1 will be described together with the manufacturing process.

As shown in FIG. 2, the bag main body 2 is comprised from the rectangular film ash 3, The shape member 20 is formed in the outer shape smaller than the outer edge of the film ash 3, and the film ash 3 It is formed so that it may be accommodated inside the outer edge of ().

The mold member 20 is formed of a thick paper or the like, and the two planar forming portions 21 and 22 and the side portions 6 which form the flat portions 4 and 5 on the bag main body 2 are formed. Two side forming parts 23 and 24 are formed. These planar formation parts 21 and 22 and the side surface formation parts 23 and 24 are arrange | positioned so that one surface may be alternately arranged, and the bending line 25 for bending this mold | type member 20 is at the boundary line of each site | part. Is formed. These planar forming parts 21 and 22 and side forming parts 23 and 24 are formed in a substantially rectangular shape, and each of the planar forming parts 21 and 22 has a slightly larger horizontal width than the vertical dimension. , And are formed in a horizontally long rectangular shape, while the side forming portions 23 and 24 are formed in a vertically long rectangle.

Moreover, the bottom face forming part 26 extended downward from the lower end of each planar forming part 21 and 22 is comprised in this mold member 20, respectively. These bottom face formation parts 26 are each formed in the rectangle whose width is slightly shorter than the horizontal width of the planar formation parts 21 and 22, respectively.

As shown in this FIG. 2, the mold member 20 is arrange | positioned at the one surface side of the film material 3 with the horizontal direction matching the long axis direction of the film material 3. And the site | part 31 of the predetermined range of the film material 3 is pushed out from the upper end of the planar forming part 21, 22 and the side surface forming part 23, 24, and the planar forming part 21, 22 and The site | part 33 of a predetermined range is pushed out from the lower end of the side surface formation part 23, 24 including the bottom surface formation part 26. As shown in FIG. In addition, at the upper end and the lower end of the film material 3, sealing areas 32 and 34 of constant width are disposed along the respective end edges, respectively. In addition, from both edges of the mold member 20, the sealing regions 35 and 36 are arranged to protrude from both sides. Then, the peripheral edge of the mold member 20 is sealed with the film material 3. The site | parts 31 and 33 of the predetermined range of the film material 3 protruded from the upper end and the lower end of the mold member 20 are comprised as the upper surface part 7 and the bottom face part 8 of the packaging bag 1. In addition, below, the site | part which protruded from the upper end of the mold member 20 among this pushed-out part is demonstrated as the upper protrusion part 31 and the site | part which pushed out from the lower end as the lower protrusion part 33. As shown in FIG.

The fastener 10 is connected to the upper protrusion 31 so as to be slightly below the sealing region 32 disposed at the upper end, so that the central positions 31a of the portions corresponding to both side portions 6 in the major axis direction are connected to each other. Is attached. This fastener 10 is comprised from the male fastener 11 and the female fastener 15 which can be mutually separated as shown in FIG. Attached. The male fastener 11 is comprised from the strip | belt-shaped base 12 and the protrusion 13 which protrudes from the one surface in the center of the width direction of this base 12. As shown in FIG. The tip of this projection 13 is formed in a substantially circular cross-sectional shape. On the other hand, the arm fastener 15 is comprised from the base 16 and the groove part 17 formed in the one surface side of the width direction center. The male fastener 11 and the female fastener 15 are separated by folding or detaching the tip of the projection 13 into the groove 17. In the state shown in this FIG. 3, the tip of the projection 13 is folded into the groove 17 so that the male fastener 11 and the female fastener 15 are integrally engaged, and the female fastener 15 is formed of a film material 3. The state attached to) is shown.

From the state of FIG. 2, the mold member 20 is bent at a right angle at the position of the bend line 25 formed at the boundary between the planar forming portions 21 and 22 and the side forming portions 23 and 24, respectively. , The end edges of the planar forming portions 22, which are both side edges of the mold member 20, and the end edges of the side forming portions 23 are brought into contact with each other, and the film member 3 is formed into a cylindrical body 50 having a rectangular cross section. Form. And the inner surface of the sealing area | regions 35 and 36 of the film material 3 overlap and seal. The state which sealed the sealing area | regions 35 and 36 comrades is shown in FIG. This sealed portion is the vertical seal 40. As is apparent from FIG. 4, the vertical sealing portion 40 is along the boundary line between the back portion 5 and the one side portion 6 which form the back side of the packaging bag 1 among the flat portions 4 and 5. Formed.

Thus, after the cylinder 50 is formed, the bottom part 8 is formed as follows.

Reference is again made to FIG. 2. As shown in this FIG. 2, the starting point P1 is virtually assigned to the inner edge of the sealing area 34 to the site | part corresponding to the side part 6 in the lower protrusion part 33, respectively. This starting point P1 is a point located at the center of the width direction at a portion corresponding to the side surface portion 6. Moreover, at the position of the lower end of the side surface forming parts 23 and 24 in the lower protrusion part 33, on the inner edge of the sealing area 35 and 36, and the boundary of the side part 6 and the flat part 4 and 5 Each side point Q1 is virtually designated on the line. And the diagonal line L1 which connects these starting point P1 and the side end point Q1 is formed.

And from the cylinder 50 shown in FIG. 4, as shown in FIG. 5, the site | part corresponding to the flat parts 4 and 5 is bent to the center side by making the lower end of the flat formation parts 21 and 22 into a base line, and is flat Folding portions 60 are formed, respectively. Moreover, also about the site | part corresponding to the side surface part 6, it is bend | folded to the center side using the lower end of the side surface formation parts 23 and 24 as a base line, respectively. The site | part corresponding to this side part part is demonstrated below as the triangular fold part 61 as the base line corresponding to the lower end of the side part formation part 23, 24 and the part of the isosceles triangle enclosed by the oblique line L1. Then, the lower sealing region 34 is bonded to the lower protrusion 33. At this time, about the site | part 62 between two origin points P1, as shown in FIG. 5, inner surface is joined to the part corresponding to planar part 4,5. On the other hand, it is located in both sides of the site | part 62 between two origin points P1, and about the side part 63 from each origin point P1, the inner surface and side part part 6 of the site | part corresponding to each flat part 4 and 5 are 6, respectively. The inner surface of the part corresponding to) is joined. Regarding the joining of the part corresponding to the planar parts 4 and 5 and the part corresponding to the side part 6, the front and rear ranges are based on the position 31a corresponding to the center of each side part 6 as a boundary. Each part is joined to the part corresponding to the front part 4, and the part corresponding to the back part 5, respectively. As a result, the sealing region 34 is formed in the shape of "H" of the alphabet as shown in FIG.

Then, the diagonal line L1 formed in the site | part corresponding to the side part 6 is folded so that it may become convex toward the inner direction of the cylinder 50, and the triangular site | part 65 located outside the diagonal line L1 like the arrow of FIG. To the center side of the cylinder 50. And as this triangular site | part 65, it is set as the state which covers the triangular folding part 61 of the isosceles triangle formed inside the diagonal line L1 from the outside. Moreover, about the sealing area 63 in a triangular site | part, what mutually opposes back and front is further sealed. Thus, the sealing part formed from the sealing area | regions 62 and 63 sealed in the "H" shape is the lower sealing part 41 which seals the lower part of the packaging bag 1.

Thereafter, this lower end sealing portion 41 is bent to the back side of the packaging bag 1 and bonded to the film material 3. Thus, the lower protrusion part 33 is folded and sealed, and as shown in FIG. 6, the flat bottom face part 8 is comprised.

FIG. 7: shows the state which laminated | stacked the film material 3 with respect to the bottom face part 8 of the packaging bag 1 by oblique line. In addition, the state which overlapped the film material 3 is also shown in FIG. 8 also about the packaging bag 1 with the mold member 20 conventionally used for comparison.

As shown in FIG. 7, in the bottom part 8 of the packaging bag 1 by this embodiment, in the vicinity of both side parts, the planar folding part 60 and the triangular folding part 61 overlap. The film material 3 is disposed. In addition, the lower end sealing part 41 is formed in strip shape at the center of the front-back direction, and this lower end sealing part 41 and the flat folding part 60 overlap. In addition, about the one side part 6 (side part 6 located in the left side of FIG. 7), the vertical sealing part 40 overlaps over the back part 5 from the center of the front-back direction. In addition, as for the packaging bag 1 which concerns on this embodiment, the bottom face formation part 26 is comprised in the mold member 20. As shown in FIG. On the other hand, in the bottom part 8a of the conventional packaging bag, as shown in FIG. 8, the triangular folding part 61a only overlaps with the flat folding part 60a in the vicinity of the side surface part 6. In addition, the bottom face formation part 26 is not specifically comprised in the mold member 20. As shown in FIG.

Thus, since the bottom part 8 of the packaging bag 1 which concerns on this embodiment forms many parts which overlap with the film material 3 compared with the conventional thing, strength improves. In addition, since the mold member 20 includes the bottom forming portion 26, the bottom forming portion 26 improves the strength of the bottom portion 8 and protects the bottom portion 8.

The upper protrusion part 31 arrange | positioned above the cylinder 50 with respect to the above bottom face part 8 is comprised as the upper face part 7 of the packaging bag 1 as follows.

Reference is again made to FIG. 2. As shown in this FIG. 2, also about the upper protrusion part 31, the starting point P2 is virtually assigned to the site | part corresponding to the side part 6 at the position corresponding to the lower end of the attachment position of the fastener 10, respectively. This starting point P2 is a point located at the center of the width direction at a portion corresponding to the side surface portion 6. In addition, at the position of the upper end of the side surface forming parts 23 and 24 in the upper protrusion part 31, on the inner edge of the sealing area 35 and 36, and the boundary of the side part 6 and the flat part 4 and 5 Each side point Q2 is virtually specified on the line. And the diagonal line L2 which connects these starting point P2 and the side end point Q2 is formed.

And the upper protrusion part 31 shown in FIG. 9 is bent from the unprocessed state to the center side with the site | part corresponding to the planar parts 4 and 5 as the base line using the upper end of the planar formation parts 21 and 22, respectively, and is planarly bending. The part 70 is formed. At the same time, the upper part is folded to be convex outward from the starting point P2 with respect to the center at the position corresponding to the side surface part 6, and the polymerization part 73 is formed in the upper part from the starting point P2. At this time, with respect to the site | part corresponding to the side surface part 6, the upper end of the side surface forming parts 23 and 24 is made into a base line, it bends outward, and it bends so that diagonal line L2 may be convex outward, and it will be inside the diagonal line L2. The part of the isosceles triangle formed is comprised as a triangular protrusion part 71. Then, the polymerization portion 73 on the upper side is sealed from the starting point P2. FIG. 10: shows the state of the cylinder 50 which sealed the polymerization part 73 of the upper side from the starting point P2.

In addition, in the state shown in this FIG. 10, the sealing area | region 32 which forms the upper end of the superposition | polymerization part 73 is closely_contact | adhered, the upper sealing part 42 is formed, and the upper part of the packaging bag 1 is sealed. On the other hand, in the lower part of the upper sealing part 42, the film material 3 is isolate | separated without sealing. Moreover, the base 12 of the male fastener 11 is sealed by the inner surface of the back part 5 in the position where the fastener 10 is arrange | positioned.

Thereafter, in FIG. 11, the polymerization portion 73 is bent to the back side of the packaging bag 1 in a state where the triangular protrusion 71 protrudes on both sides of the packaging bag 1. Then, the polymerization bag 73 and the triangular protrusion 71, which protrude outward from the side surface 6 of the packaging bag 1, are packed at the position of the upper ends of the side surface forming portions 23, 24. By bend | folding downward and joining to the outer surface of each corresponding side part 6, the hexahedral packaging bag 1 shown in FIG. 1 is completed.

In addition, although the packaging bag 1 which concerns on the above embodiment demonstrated that the mold member 20 was equipped with the bottom face formation part 26 as an example, even if it does not comprise the bottom face formation part 26, this packaging bag 1 ) Can be formed.

12 shows a developed view of a packaging bag using the mold member 20a without the bottom surface forming portion.

The packaging bag 1a shown in this FIG. 12 employs a mold member 20a, which does not include a bottom surface forming portion and has an outer shape formed in a rectangular shape. Also about the packaging bag 1a which concerns on this embodiment, the bag main body 2 is comprised from the rectangular film ash 3, and the mold member 20a forms the outer shape smaller than the outer edge of the film ash 3 It is formed so that it may be accommodated inside the outer edge of the film material 3.

And the mold member 20a has two planar formation parts 21 and 22 which form the planar parts 4 and 5 in the bag main body 2, and the two side surfaces which form the side part 6, The forming parts 23 and 24 are provided. These planar forming parts 21 and 22 and side surface forming parts 23 and 24 are also arrange | positioned so that they may be alternately arrange | positioned one by one, and the bending line 25 for bending this mold member 20a at the boundary line of each site | part is carried out. Is formed.

Moreover, the part which protrudes from the upper end of the mold member 20a in the film material 3 is the upper protrusion part 31, and the part which protrudes from the lower end of the mold member 20a is the lower protrusion part 33. As shown in FIG. Also about this film material 3, the sealing area | region 32, 34, 35, 36 is formed in the circumferential edge, and with respect to the upper protrusion part 31, the fastener 10 is slightly below the sealing area | region 32. A fastener attachment portion 37 to which is attached is formed.

The lower protrusion 33 has a starting point P1 virtually assigned to the inner edge of the sealing region 34, on the inner edges of the sealing regions 35 and 36, and on the boundary between the flat portions 4 and 5 and the side portions 6. Virtually designated side end points Q1 are arranged at each end, and an oblique line L1 connecting these starting points P1 and side end points Q1 is formed. The upper projection 31 also has a starting point P2 virtually designated at a position corresponding to the side surface portion at a position corresponding to the lower end of the attachment position of the fastener 10, on the inner edges of the sealing regions 35 and 36, and the plane. On the boundary line between the sections 4, 5 and the side section 6, virtually designated side end points Q2 are arranged, and an oblique line L2 is formed to connect these starting points P2 and side end points Q2.

Also as shown in this FIG. 12, the hexahedral packaging bag is formed through the said process.

Moreover, when mass-producing this packaging bag, a strip | belt-shaped film material is sent out from a film roll, and a fastener and a mold member are arrange | positioned sequentially to the sent out film material.

13 briefly illustrates the process. As shown in this FIG. 13, the fastener 10 is first attached to the strip | belt-shaped film material 81 sent from the film roll 80 at every predetermined space | interval of the longitudinal direction. As shown in FIG. 3, the fastener 10 is in the state where the male fastener 11 and the female fastener 15 are engaged with each other, and its axial direction coincides with the width direction of the film material 81 so that the film material 81 Is attached to.

Next, the mold member 20a is arrange | positioned in the film material 81 on the upstream side of each fastener 10 in the conveyance direction sequentially. The mold member 20a is arranged so that the longitudinal direction thereof coincides with the width direction of the film material 81 and is interposed between the fastener 10 and a predetermined predetermined dimension. Then, the peripheral edge of the mold member 20a is attached to the film member 81.

Then, the film material 81 is cut | disconnected sequentially by the cutting line C located downstream of the fastener 10 shown by the dashed-dotted line of FIG. The cut | disconnected state is the state which the packaging bag 1a shown in FIG. 12 unfolded, and the packaging bag is produced sequentially through this process from this state.

In FIG. 13, the mold member 20a does not include the bottom surface forming portion as an example. However, when the mold member 20 having the bottom surface forming portion 26 is employed, the formed bag 20 is formed of a packaging bag ( It shows in FIG. 2 which developed 1).

In addition, in the case of providing the fastener, in the above embodiment, the case where the fastener tape is used has been described as an example, but it goes without saying that it is also applicable to the case where the fastener is formed by injection.

According to this invention, since the area which the site | part which overlapped and superimposed a film material becomes large in the bottom part of a packaging bag, the strength of a bottom part can be improved. Therefore, the fracture of the bottom part can be prevented effectively. In addition, the rigidity of the bottom portion is improved, and even if an external force is applied from the bottom portion, deformation of the bottom portion does not occur. As a result, the influence of the external force is less likely to be transmitted to the inside, thereby improving the protection performance of the contents.

Claims (4)

A bag main body composed of a film material formed in one rectangular shape, sealed on an inner surface of the bag main body, and a pair of flat parts opposing the external shape of the bag main body, on both sides of these flat parts. A hexahedron-shaped member comprising a pair of opposing side portions, an upper surface portion, and a bottom portion facing the upper surface portion, and a fastener attached to the upper surface portion to enable resealing after opening the upper surface portion. And the mold member is arranged such that the pair of planar portions and the pair of side face portions corresponding to the pair of the planar portions and the pair of the side portions are alternately adjacent to each other, such that a bent line in which these portions are parallel to each other. In the packaging bag which is bent by) and the end edges of the planar forming portions forming both end edges of the mold member and the end edges of the side forming portions are abutted, The bag main body has the mold member disposed inward, bonds the inner surfaces of both edges of the film member to a predetermined width while bending the mold member at the bend line, and is pushed out of the upper and lower ends of the mold member, respectively. A cylinder is formed by forming an upper protrusion and a lower protrusion, and a film member is drawn to the plane forming portion and the side forming portion of the mold member so that the flat portion and the side portion are formed, respectively, and the upper protrusion of the cylinder is formed. Is folded to form the upper surface portion, the lower protrusion of the cylinder is folded to form the bottom portion, When constituting the cylindrical body, a vertical sealing portion, in which side edges of the film material are bonded to each other, is formed to extend vertically from one side of the flat portion of the packaging bag, The bottom surface portion, and the bottom sealing portion is sealed portion of a constant width from the lower end of the lower protrusion, In the lower protrusion, the portion protruding downward from the side portion is folded into the center side of the packaging bag at a base line corresponding to the lower end of the mold member, and the lower seal portion in the center of the packaging bag in the front-back direction. A diagonal line connecting the starting point corresponding to the inner edge and the vertex corresponding to the lower end of the mold member at the front and rear end edges of the portion pushed out from the side portion is folded into a convex shape inside the packaging bag. A triangular fold surrounded by these steamers and diagonal lines, A flat foldable portion formed by bending the portion protruding from the flat portion from the flat portion to the center of the packaging bag using a lower end of the mold member as a base line, and covering the triangular foldable portion, The lower end sealing part includes a central sealing part which seals inner surfaces with respect to a portion corresponding to the starting point in a part which is pushed out of the flat part, and a part which is pushed out from each flat part on both sides of the central sealing part. And a side seal that seals the inner surfaces of the portions pushed out from the side surfaces, respectively, and the side seal is configured to be sealed to each other facing each other in the front-rear direction. The said upper surface part is a part of the upper projection which protrudes upwards from each planar part, and the planar bending part bent to the center by the base line as the base line of the said mold member, A triangular protrusion bent such that a portion protruding upward from each side portion protrudes from side to side in a triangular shape with the upper end of the mold member as a base line, and above these flat bent portions and triangular protrusions, the center of the front and rear directions of the bag; In the case where the upper projection is folded, the inner surface facing each other overlapped with the polymerization portion, and the upper sealing portion sealing the upper edge of the polymerization portion, the polymerization portion is folded back to the back side of the packaging bag In addition, the triangular protrusion is folded to overlap the outer surface of each side portion corresponding to the flat formed is characterized in that Packaging bag. The packaging bag according to claim 1, wherein the vertical sealing portion is formed on the back side of the packaging bag in the planar portion, and is formed along one side edge of the back surface. The packaging bag according to claim 1, wherein the mold member is provided with a bottom forming portion that protrudes from a lower end of each planar forming portion and is bendable with respect to each planar forming portion.

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