JPH0133476Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a packaging bag made of synthetic resin film or the like.

(Prior art) As shown in FIGS. 8 and 9, conventional packaging bags are made by folding and polymerizing synthetic resin film or the like in half at the upper end to form a front surface 31 and a back surface 32. Part 3
A gusset bottom part 33 is extended from the lower end of 2, and the side end surface is bent into a W shape, and these surface parts 31,
There is a bag body 35 whose lower end is open by welding and welding or welding and cutting the side edges 34 of the back surface part 33 and the bottom part 33 of the gusset.

(Problems to be Solved by the Invention) However, in the conventional case, the shape retention of the bottom of the packaging bag was poor, and it was difficult to make the packaging bag stable and stand on its own.

Therefore, as shown in FIGS. 10 and 11,
For a packaging bag 36 with an open top end, a core plate material 38 is superimposed on the outer surface of the gusset bottom 37,
There is a bag in which both ends in the width direction are fixed to both sides of the bottom part 37 of the gazette, and the core plate material 38 allows the packaging bag to stabilize and stand on its own (for example, Utility Model Publication No. 55-6277). In view of this, applying this idea, in the packaging bags shown in FIGS. 8 and 9, the core plate material 38 is superimposed on the outer surface of the gusset bottom 33, and both edges in the width direction are aligned with the outer surface of the gusset bottom 37. It is conceivable that the packaging bag be fixed to both side edges, thereby making the packaging bag stable and self-supporting.

However, in this case, since the core plate material 38 is exposed to the outside, the appearance is unsightly, and external objects can easily catch on the core plate material 38, causing damage to the core plate material 38 or gusseting. There was a risk that it would come off unexpectedly from the bottom part 33. Moreover, when storing products in the bag body 35 and placing the products on the bottom part 33 of the gazette, even if the core plate material 38 is held in such a manner that both edges of the core plate material 38 are compressed, the core plate material 38 simply moves in the front-rear direction. It is difficult to widen the bottom part 33 of the gazette forward and backward due to the swelling, and therefore it is difficult to spread the bottom part 33 of the gazette forward and backward.
There was a problem in that it was not possible to smoothly place the product on the bottom part 33 of the gazette and package it after the product was stored in the case.

In view of the above-mentioned problems, the present invention allows the bag body to stably stand up on its own without the fear that the core plate material will get caught on external objects and be damaged or come off from the bottom of the gusset, while also improving its appearance. It is designed to provide good packaging and allow for smooth packaging of products, etc.

(Means for Solving the Problem) The technical means of the present invention for solving this technical problem is such that the upper end portions of the front surface portion 1 and the back surface portion 2 overlapping with the front surface portion 1 span the entire length in the width direction. connected to each other,
A pair of outer walls 4, 5 on the outer side in the front and back direction and a pair of inner walls 6, 7 on the inner side in the front and back direction are formed so that the side cross section is W.
A gusset bottom part 3, which is bent from the back part 2 to the front part 1 side to form a shape, extends to the lower end of the back part 2, and the outer wall 5 of the gusset bottom part 3 on the front part 1 side is
polymerized so as to be able to freely approach and separate from the lower end of the surface portion 1;
In a packaging bag in which both sides 11 in the width direction of the front surface portion 1, back surface portion 2, and gusset bottom portion 3 are welded and cut or welded and cut so as to form a bag body 13 with an open bottom end, both of the gusset bottom portions 3 are welded and cut. Core plate materials 9, 10 are superimposed on the inner surfaces of the outer walls 4, 5 over substantially the entire length in the width direction, and the core plate materials 9, 10 are superimposed on the inner surfaces of the outer walls 4, 5, respectively, over substantially the entire length in the width direction. The point is that it is welded all the way.

(Function) By holding both side edges of the gusset bottom 3 in a compressed manner, the core plates 9 and 10 can be expanded in an arcuate manner in the front-rear direction so as to be spaced apart from each other, and at the same time, the outer walls 4 of the gusset bottom 3, The gusset 5 also swells in an arcuate manner in the front-rear direction so as to be spaced apart from each other together with the core plates 9 and 10, thereby allowing the gusset bottom 3 to be easily and reliably widened. Moreover, since the core plate members 9 and 10 are inside the bag body 13, there is no possibility that external objects will get caught on them.

Embodiment Hereinafter, the present invention will be explained according to the illustrated embodiment. In FIGS. 1 and 2, 1 is a surface portion, 2 is a
is a back surface portion, which is formed by folding and polymerizing a synthetic resin film in half at the upper end, and the front surface portion 1 and the back surface portion 2 are polymerized with each other. Reference numeral 3 denotes a bottom part of the gazette, which extends to the lower end of the back surface part 2, and forms a pair of outer walls 4, 5 on the outer side in the front and back direction and a pair of inner walls 6, 7 on the inner side in the front and back direction, and has a side cross section of W. It is bent toward the surface portion 1 side to form a shape. The outer wall 5 on the surface portion 1 side of the gazette bottom portion 3 is superimposed on the lower end portion of the surface portion 1 so as to be able to come into contact with and separate from it.

Numerals 9 and 10 are core plate materials, which are made of thick synthetic resin film, synthetic paper, etc. that can be mutually welded to the bottom part 3 of the gusset, and are used as the outer walls 4 and 5 of the bottom part 3 of the gusset.
They are superimposed and attached to each inner surface side over the entire length in the width direction.

The front surface part 1, the back surface part 2, the gusset bottom part 3, and both side edges 11 of the core plates 9 and 10 are welded and cut or welded and cut, thereby forming a bag body 13 having a lower end opening 12.

3 and 4 show another embodiment, in which the front film part 15 is made of a synthetic resin film and the front part 1 is integrally formed with the back part 2;
The core plate material 16 is made of a thick synthetic resin film or synthetic paper that can be welded to the core plate material 1.
6 and the upper end of the back surface part 2 are heat welded 17 and 18 at a vertical interval, thereby forming a header part 19 at the upper end of the bag body 13.
A hanging hole 20 is provided in the center of the hole. Further, the lower ends of the core plate material 16 and the front film portion 15 are thermally welded 21. In other respects, the configuration is substantially the same as that of the previous embodiment.

FIGS. 5 to 7 show still other embodiments,
The back part 2 and the bottom part 3 of the gusset are made of a synthetic resin film, and the front part 1 is made of a core board material such as a thick synthetic resin film or synthetic paper that can be welded to the back part 2. Part 2
The upper ends of the bag body 1 are thermally welded 17 and 18 over the entire length in the width direction at intervals vertically, thereby forming the bag body 1.
A header part 19 is formed at the upper end of the header 3, and a hanging hole 20 is opened in the center of the header part 19. In other respects, the configuration is substantially the same as that of the previous embodiment.

(Effect of the invention) According to the invention, the core plate materials 9, 10 are superposed on the inner surfaces of both outer walls 4, 5 of the gazette bottom 3 over substantially the entire length in the width direction. are welded to the superposed outer walls 4, 5 over substantially the entire length in the width direction, so that the core plate materials 9, 10 are fixedly integrated with the outer walls 4, 5 over substantially the entire length in the width direction. Since the core plate materials 9 and 10 can be held in a tightly polymerized state over the entire length in the width direction on the inner surfaces of the outer walls 4 and 5, it is possible not only to make the packaging bag stably self-supporting, but also to make the inside of the bag body 13 After storing products, etc., when placing the products, etc. on the bottom part 3 of the gazette, the outer walls 4, 5 of the bottom part 3 of the gazette are held together with the core plates 9, 10 by compressing both side edges of the bottom part 3. The bottom part 3 of the gusset is inflated in an arch shape in the front and back direction so as to be spaced apart from each other.
can be widely spread back and forth, and products etc. can be easily and smoothly placed on the bottom part 3 of the gazette and easily packaged. In addition, when the bag body 13 is in an unused state where no products or the like are stored, a pair of core plate materials 9,
10 sandwich the inner walls 6 and 7 of the gusset bottom 3 in a folded state, and the gusset bottom 3
It can be reliably held in a compactly folded state, making it very convenient for storing and storing packaging bags. Moreover, since the core plates 9 and 10 are inside the bag body 13, the appearance is slim and the body is very fit, and external objects are caught on the core plates 9 and 10.
There is no fear that the core plates 9, 10 will be damaged or the core plates 9, 10 will come off unexpectedly from the bottom part 3 of the gusset. Further, as described above, the core plate materials 9, 10 are fixedly integrated with the inner surfaces of the outer walls 4, 5 over substantially the entire length in the width direction, and the core plate materials 9, 10 are attached to the inner surfaces of the outer walls 4, 5.
Since the inner surface can be held in a tightly overlapping state over the entire length in the width direction, there will be no inconvenience such as the products getting caught on the core plates 9 and 10 when the products are stored in the bag body 13.

[Brief explanation of the drawing]

Fig. 1 is a rear view showing one embodiment of the present invention;
The figure is a sectional view of the same side. FIG. 3 is a rear view showing another embodiment, and FIG. 4 is a sectional view of the same side. FIG. 5 is a rear view showing another embodiment, FIG. 6 is a sectional view of the same side,
Figure 7 is a perspective view from below the wrapped fold, Figure 8 is a perspective view of a conventional example during assembly, Figure 9 is a perspective view of the same after assembly, and Figure 10 is another conventional example. FIG. 11 is a perspective view during assembly, and FIG. 11 is a perspective view after assembly. 1... Surface part, 2... Back part, 3... Gazette bottom, 4, 5... Outer wall, 6, 7... Inner wall, 9, 1
0...Core plate material, 11...Side edge, 13...Bag body.

Claims (1)

[Scope of utility model registration request] The upper end portions of the front surface portion 1 and the back surface portion 2 superimposed on the front surface portion 1 are connected to each other over the entire length in the width direction. A gusset bottom part 3 that forms inner walls 6 and 7 and is bent from the back part 2 toward the front part 1 so that the side cross section is W-shaped extends to the lower end of the back part 2,
The outer wall 5 on the front surface 1 side of the gazette bottom 3 is superimposed on the lower end of the front surface 1 so as to be able to come into contact with and separate from it, and the front surface 1 and the back surface 2 and a packaging bag in which both widthwise edges 11 of the gusset bottom 3 are welded and cut or welded and cut, both outer walls 4 and 5 of the gusset bottom 3 are welded and cut.
A core plate material 9 is provided on each inner surface side of the core plate 9 over substantially the entire length in the width direction.
10 are polymerized, and each core plate material 9, 10 is welded to the polymerized outer walls 4, 5, respectively, over substantially the entire length in the width direction.