JPH08113249A - Simple self-standing bag - Google Patents

Abstract

PURPOSE: To provide a simple self-standing bag appropriate for a so-called substitutive article for a bottle to directly divide the contents in the bag body into respective small quantities. CONSTITUTION: Constricted parts 12 are provided at both right and left side sealing parts 3 and vertical sealing parts 18 are provided from the upper end 14 of the constricted part 12 and further, slanting side sealing parts 19 are provided from the upper end 20 of the vertical side sealing parts 18. As a result, when the contents are charged and the bag body 1A is formed cubically, the intersection 20 of the vertical side sealing parts 18 and the slanting side sealing parts 19 is forcibly bent and recesses are formed at both right and left side sealing parts 3 and corners are formed at the upper end of the recess. Since the corners are forcibly formed, it has no relation with the inner pressure of the bag body 1A. Even if the contents decrease, the corners keep the shape and it is most suitable for a substitutive article for a bottle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises, for example, a flexible resin film single layer material or a flexible laminated material obtained by laminating aluminum foil or paper on the resin film. The present invention relates to a simple self-supporting bag that is self-supporting, and particularly to a simple self-supporting bag that is optimal as a so-called bottle substitute for directly subdividing and using the contents of the bag body. In this specification, the simple self-supporting bag and the bag body are substantially synonymous.

[0002]

2. Description of the Related Art A conventional simple self-supporting bag of this type is shown in FIG.
This will be described with reference to FIGS. In the figure, A is a bag body made of a resin film such as polyethylene, polypropylene or nylon, that is, a conventional simple self-standing bag. The bag body A is usually in a state of being folded in a planar shape as shown in FIGS. 5 and 7 (A), and contains contents (for example, liquids such as vegetable oil, soy sauce, liquid detergent, flour and powder soap). 6 and FIG. 7 when filled with powder, granular material such as rice, semi-fluid material such as paint or adhesive, and simply referred to as contents.
As shown in (B), it has a three-dimensional shape.
As shown in FIG. 7 (A), the bag body A is formed by folding a substantially central portion of one flexible film into a W-shape to form a front side portion (front surface side in the drawing) 100 and an inverted V-shaped bottom. It is composed of a side portion 102 and a back side portion 101. Or, as shown in FIG. 7 (A), this bag body A is
Between the lower end portion of the front side portion (front surface side in the drawing) 100 of one flexible film and the lower end portion of the back side portion 101 of the same flexible film, the same flexible film is formed into an inverted V shape. Both bottom ends of the bottom portion 102 formed by bending are connected. The bag body A described above has a mouth portion having an open upper edge (a seal allowance 1 for sealing to seal an upper edge opening described later).
0, and a portion including a chuck allowance that a machine (not shown) chucks when filling the contents into the bag body A) 1.
W bottom 2 having a lower edge formed in a W shape, and front side parts 10 on both left and right sides from the W bottom 2 to the mouth part 1.
0 and the back side portion 101, and the front side portion 100 and the bottom side portion 1
02, and the side seal portion 3 formed by sealing the back side portion 101 and the bottom side portion 102 substantially parallel to each other, and the W
From the intersection of the lower edge seal part 6 formed by sealing the lower edge of the bottom part 2 and the side seal parts 3 at both ends of one mountain fold line 7 of the W bottom part 2, two valleys of the W bottom part 2 are formed. From the left and right W bottom seal portions 9 that are obliquely sealed up to the bending line (the inner edge of the lower edge seal portion 6) and the curved concave line provided on one side or both sides of the side seal portion 3 The holding recess 4 is formed, and usually has a bilaterally symmetrical planar shape.
As shown in FIG. 5, the broken line 4'of the holding recess 4 described above.
The outer portion may be cut off. The contents are filled from the mouth portion 1 into the bag main body A which is in the state of being folded into the above-mentioned normal plane shape. Then, since the bag body A is made of a flexible material, the planar bag body A has a three-dimensional shape. That is, as shown in FIGS. 6 and 7B, the front side portion 100 and the back side portion 101 of the bag main body A.
While the central portion of the left and right swells back and forth, the left and right side seal portions 3 and the left and right side portions of the front side portion 100 and the back side portion 101 are both left and right (the front side portion 100 and the back side portion 101 described above).
Is pulled in in a direction substantially orthogonal to the frontward and rearward bulging direction of the central portion of the bag, and a bottom is formed in the W bottom portion 2 to form a planar bag body A having a three-dimensional shape. At this time, the bottom of the W bottom portion 2 (bottom side portion 102) is substantially square or rectangular, and the bottom portion 1 to the W bottom portion 2 are formed.
The cross section of the body portion 5 including the portion up to the valley fold line 8 has a substantially square or rectangular shape, and the holding concave portion 4 bites inward to form concave portions 11 in the left and right side seal portions 3 of the three-dimensional bag body A. It is formed. When viewed from the front (or back) of the three-dimensional simple self-standing bag, the concave portion 11 has a substantially U-shape, and the connecting portions between the upper and lower ends and the left and right side seal portions 3 form a gentle curve. . Then, after filling the contents, by sealing the front side portion 100 and the back side portion 101 of the upper edge opening of the mouth portion 1,
The contents can be sealed. Next, at the time of use, at the position below the seal portion 10 of the mouth portion 1, the bag body A
Then, the mouth is opened to open the mouth, the finger or the like is put on the concave portion 11 of the side seal portion 3 to hold the bag body A, and the contents in the bag body A are transferred to another container. And since the above-mentioned simple self-supporting bag is made of a flexible material, it can be folded into a substantially flat shape after use and discarded, so that it is not bulky compared to other containers such as blow molded blow bottles and bottles, The volume of the waste can be reduced accordingly, and the waste treatment is easy. As a result, the above-mentioned simple self-standing bag is widely used as a refill product for other containers such as blow molded blow bottles and bottles. As the above-mentioned simple self-supporting bag, there is one described in Japanese Utility Model Laid-Open No. 59-162440.

The above-mentioned simple self-standing bag is used for refilling. That is, the above-mentioned simple self-supporting bag does not directly divide the contents in the bag body A into small pieces,
It is used to transfer the contents of the bag body A to another container such as a blow-molded blow bottle or bottle at one time.

On the other hand, in the case of the simple self-standing bag, it is desired to use it as a so-called bottle substitute in which the contents in the bag body are directly divided and used. When it is used as a substitute for a bottle, it must have a certain degree of shape-retaining property, that is, a shape-retaining property such that the bag body does not collapse when the contents in the bag body are directly subdivided.

[0005]

However, although the above-mentioned simple self-supporting bag has self-supporting property, since no consideration is given to the above-mentioned shape-retaining property, the contents in the bag body A are directly subdivided and used. Yes, it is not suitable as a so-called bottle substitute.

An object of the present invention is to provide a simple self-supporting bag suitable as a so-called simple self-supporting bag for so-called bottle replacement, in which the contents in the bag body are directly divided and used.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a narrowed portion is provided on both left and right side seal portions, and the side seal vertical portion is located at the intersection of the left and right side seal portions and the upper end of the throttle portion. The side-seal vertical portion is provided so as to be inclined inward from the upper end of the vertical side-seal portion to the vicinity of the mouth portion.

[0008]

According to the present invention, when the contents are filled and the simple self-standing bag is three-dimensionally formed, that is, the central portions of the front side portion and the back side portion are swelled back and forth, and the left and right side seal portions are formed. When the left and right side portions of the front side portion and the back side portion are pulled in to the left and right, the intersection point between the side seal vertical portion and the side seal inclined portion is forcibly bent. On the other hand, when the contents are filled and the simple self-supporting bag is three-dimensionally formed, the squeezing part and the side seal vertical part dig into the inside, and the left and right side seal parts of the three-dimensional simple self-supporting bag are front or back of the simple self-supporting bag. When viewed from above, a substantially V-shaped concave portion is formed. As a result, at the intersection of the upper end of the above-mentioned lateral V-shaped concave portion and the side seal inclined portion, the above-mentioned compulsorily bent corner portions protruding to the left and right sides are formed. The corners on the upper end side of the above-mentioned recessed portions are suitable when fingers or the like catch on the corners and directly use the contents in small portions from the bag body. Moreover, since the corners are forcibly formed, they have nothing to do with the internal pressure due to the contents inside the bag body. Even if it comes, the above-mentioned corners are still formed with sufficient shape retention. Therefore, it is most suitable for a so-called simple, self-supporting bag for substituting a bottle, which is used by directly dividing the contents from the bag body.

[0009]

EXAMPLES Two examples of the examples of the simple self-standing bag of the present invention will be described below with reference to FIGS. 1 to 4. 1 to 3
Shows a first embodiment of the simple self-supporting bag of the present invention. In the figure, the same reference numerals as those in FIGS. 5 to 7 indicate the same components. In the figure,
1A is a bag body. This bag body 1A has a front side portion 10
0, a back side portion 101, and an inverted V-shaped bottom side portion 102 between the front side portion 100 and the back side portion 101 of the flexible film. The bag body 1A includes a mouth portion 1 having an open upper edge, a W bottom portion 2 having a lower edge formed in a W shape, and the mouth portion 1 to the W portion.
On both left and right sides up to the bottom portion 2, a front side portion 100 and a back side portion 101, and a front side portion 100 and a bottom side portion 10
2, and a side seal portion 3 formed by sealing the back side portion 101 and the bottom side portion 102, respectively.

In the figure, reference numeral 12 is a throttle portion which is narrowed inwardly in substantially the middle portion of the left and right side seal portions 3.
When the bag main body 1A is three-dimensionally formed by filling the contents with the narrowed part 12, the narrowed part 12 bites inward and the lateral side seal portions 3 of the three-dimensional bag main body 1A are substantially horizontal V.
This is for forming the V-shaped concave portion 13. The narrowed portion 12 has an upper end point 14 of the left and right side seal portions 3.
And the first intermediate point 1 of the front side portion 100 and the back side portion 101.
5 and the second intermediate point 16 and the lower end points 17 of the left and right side seal portions 3 are connected to form a trapezoidal or quadrangular shape.

In the drawing, 18 is a side seal vertical portion. The side seal vertical portion 18 is the left and right side seal portions 3, and is provided substantially vertically from the intersection of the upper end 14 of the throttle portion 12 and the left and right side seal portions 3 toward the mouth portion 1 side. Become.

In the figure, 19 is a side seal inclined portion. The side seal inclined portion 19 is provided so as to be inclined inward from the upper end 20 of the side seal vertical portion 18 to the vicinity of the mouth portion 1. The side seal inclined portion 19 has two seal portions that are substantially parallel and perpendicular to each other at the mouth portion 1, and has a divergent shape from the mouth portion 1 to the upper end 20 of the side seal vertical portion 18. The narrowed portion 12, the side seal vertical portion 18, and the side seal inclined portion 19 are formed by fixing the front side portion 100 and the back side portion 101 by heat welding or adhesion.
Further, the outside of the side seal inclined portion 19 may be cut off along the alternate long and short dash line 3 '.

The dimensions of the simple self-standing bag (bag body 1A) of the present invention in this embodiment are as follows. That is,
When the content is stored in 300 ml, the length C1 between the insides of the left and right side seal portions 3 is 90 mm, and the valley fold line 8
The length D1 between the intersections of the lower edge seal portion 6 and the left and right W bottom seal portions 9 is 45 mm, and the length E1 between the intersections and the inside of the left and right side seal portions 3 is 2 respectively.
2.5 mm, the height F1 between the upper edge of the mouth portion 1 and the valley fold line 8 is 190 mm, the height between the mountain fold line 7 and the valley fold line 8 of the W bottom portion 2 (hereinafter referred to as the W bottom portion 2). G1 is 22.5 mm, and the height from the upper edge of the mouth portion 1 to the lower boundary line 14 (height of the mouth portion 1) B1 is 15
mm, from the lower edge of the mouth portion 1 to the first intermediate point 15 of the throttle portion 12
The height A1 to the center between the second intermediate point 16 and 100 is 100.
mm, the first intermediate point 15 and the second intermediate point 1 of the throttle portion 12
The height H1 from the center between 6 and the mountain fold line 7 is 5
It is 5 mm. When the content is 500 ml, the length C1 between the insides of the left and right side seal portions 3 is 1
00 mm, the length D1 between the intersections of the bottom edge seal portion 6 and the left and right W bottom seal portions 9 at the valley fold line 8 is 50 m
m, the length E1 between each of the intersections and the inside of the left and right side seal portions 3 is 25 mm, the height F1 between the upper edge of the mouth portion 1 and the valley fold line 8 is 255 mm, and the height of the W bottom portion 2 is Height between mountain fold line 7 and valley fold line 8 (hereinafter W
It is called the folding width of the bottom portion 2. ) G1 is 25 mm, mouth 1
The height B1 from the upper edge to the lower boundary line 14 (height of the mouth portion 1) is 20 mm, and between the lower edge of the mouth portion 1 and the first intermediate point 15 and the second intermediate point 16 of the narrowed portion 12. The height A1 to the center of the is 130 mm, the first intermediate point 15
The height H1 from the center between the second intermediate point 16 and the mountain fold line 7 is 80 mm. Further, in the bag main body 1A containing 300 ml and 500 ml of contents, the distance I1 between the upper end point 14 and the first intermediate point 15 of the narrowed portion 12 is 5 mm, and the first intermediate point 15 and the second intermediate point 16 are The distance J1 is 5 mm, and the distance K1 between the second intermediate point 16 and the lower end point 17 is 5 m.
m, between the inside of the side seal portion 3 and the first intermediate point 15 and the second intermediate point 16 of the throttle portion 12, L1 is 2 to 3 mm,
The height of the side seal vertical portion 18, that is, the height M1 from the upper end point 14 of the narrowed portion 12 to the intersection 20 of the side seal vertical portion 18 and the side seal inclined portion 19 is 7 to 10 mm.
Is. In addition, the center between the first intermediate point 15 and the second intermediate point 16 of the above-mentioned narrowed portion 12 is approximately from the line of sight (the upper edge of the content filled in the bag body 1A) to the valley fold line 8. Three
Located at / 5.

Since the simple self-supporting bag of the present invention in this embodiment has the above-mentioned structure, when the bag main body 1A is filled with the contents to form the simple self-supporting bag three-dimensionally, that is, the front side portion 100. And the central portion of the back side portion 101 swells back and forth, and the left and right side seal portions 3 and the left and right side portions of the front side portion 100 and the back side portion 101 are both left and right (to the front and back of the central portion of the front side portion 100 and the back side portion 101 described above. When it is pulled in (in a direction substantially orthogonal to the bulging direction), the intersection portion 20 of the side seal vertical portion 18 and the side seal inclined portion 19 is forcibly bent.
On the other hand, when the simple self-supporting bag is three-dimensionally formed by filling the contents, the narrowed portion 12 and the side seal vertical portion 18 bite inward, and the middle portion of the left and right side seal portions 3 of the three-dimensional simple self-supporting bag is almost in between. A concave portion 13 having a substantially horizontal V-shape is formed in the simple self-standing bag when viewed from the front or back. As a result, at the intersection of the upper end of the horizontal V-shaped concave portion 13 and the side seal inclined portion 19, that is, the intersection 20 of the side seal vertical portion 18 and the side seal inclined portion 19, the above-mentioned compulsion is forced. Corners 2 that are bent and protrude to the left and right
1 is formed. With the corner portion 21 on the upper end side of the above-mentioned concave portion 13, a finger or the like catches on the corner portion 21, and it is suitable when the contents are directly subdivided from the bag main body 1A and used. Moreover, since the corner portion 21 is forcibly formed, it has nothing to do with the internal pressure due to the contents in the bag body 1A. Therefore, the contents are gradually subdivided from the bag body 1A and gradually used. Even if the number is decreased, the above-mentioned corners 21 are still formed while having a sufficient shape retention. That is, even if the content becomes small and drops below the position of the recess 13 of the bag body 1A, and the internal pressure in the recess 13 of the bag body 1A becomes zero, when the portion of the recess 13 is gripped, the bag body 1 will be removed.
Similar to the case where the contents are filled in A to form a simple self-standing bag three-dimensionally, the central portions of the front side portion 100 and the back side portion 101 swell back and forth, and the left and right side seal portions 3 are formed.
And the left and right side portions of the front side portion 100 and the back side portion 101 are pulled leftward and rightward, and the intersection 20 portion of the side seal vertical portion 18 and the side seal inclined portion 19 is forcibly bent, and as a result, both the left and right side seals are drawn. A substantially horizontal V-shaped recess 13 is formed in a substantially middle portion of the portion 3, and
The above-described corner portion 21 is inevitably formed at the intersection of the upper end of the lateral V-shaped recess 13 and the side seal inclined portion 19. In this way, it is most suitable for a so-called simple self-standing bag for so-called bottle replacement, in which the contents are directly subdivided from the bag body 1A and used.

In particular, in this embodiment, the throttle unit 12
Is an upper end point 14 of the left and right side seal portions 3, a first intermediate point 15 and a second intermediate point 16 of the front side portion 100 and the back side portion 101, and a lower end point 17 of the left and right side seal portions 3.
Since a trapezoidal or quadrangular shape connecting the four points is formed, the portion between the first intermediate point 15 and the second intermediate point 16 becomes a band and is located at the valley of the V-shaped concave portion 13. Strong against external force from the left and right.

When the bag main body A having a planar shape is formed into a three-dimensional shape by being filled with the contents, a substantially square or rectangular bottom (bottom side portion 102) is formed on the W bottom 2. The cross section of the body portion 5 including the portion from the mouth portion 1 to the valley fold line 8 of the W bottom portion 2 is substantially square or rectangular.

FIG. 4 is a front view showing a second embodiment of the simple self-standing bag of the present invention, which is folded in a plane shape.
In the figure, the same reference numerals as those in FIGS. 1 to 3 and 5 to 7 indicate the same components. In the figure, 22 is a diaphragm. The narrowed portion 22 has upper end points 23 of the left and right side seal portions 3,
A triangular shape is formed by connecting three points, that is, an intermediate point 24 between the front side portion 100 and the back side portion 101 and a lower end point 25 of both the left and right side seal portions 3. In the figure, 26 is a side seal vertical portion. This side seal vertical portion 26
The left and right side seal portions 3 are provided substantially vertically from the intersection of the upper end 23 of the throttle portion 22 and the left and right side seal portions 3 toward the mouth portion 1 side. In addition,
Reference numeral 27 in the figure denotes the upper end of the side seal vertical portion 26, which is the intersection of the side seal vertical portion 26 and the side seal inclined portion 19.

An upper end point 23 and an intermediate point 24 of the narrowed portion 22.
And N1 is 5 mm, and O is between the middle point 24 and the lower end point 25.
1 is 10 mm, from the inside of the side seal portion 3 is a throttle portion 22
L1 is 2 to 3 mm until the intermediate point 24 of the side seal vertical portion 26, that is, the height from the upper end point 23 of the narrowed portion 22 to the intersection 27 of the side seal vertical portion 26 and the side seal inclined portion 19. P1 is 7 to 10 mm.

Since the simple self-supporting bag of the present invention in this embodiment is constructed as described above, it is possible to achieve the same effect as that of the first embodiment.

In the above embodiment, an arcuate W bottom seal portion may be provided instead of the linear left and right W bottom seal portions 9.

[0021]

As is apparent from the above, the simple self-supporting bag of the present invention is most suitable for so-called bottle replacement in which the contents of the bag body are directly divided into small parts for use.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a simple self-standing bag of the present invention, which is folded in a planar shape.

FIG. 2 is a front view showing a state in which the contents are filled and sealed in the bag body.

FIG. 3 is a side view showing a state where the bag main body is filled with contents and sealed.

FIG. 4 is a front view showing a second embodiment of the simple self-standing bag of the present invention, which is folded in a planar shape.

FIG. 5 is a front view showing a conventional simple self-standing bag folded in a planar shape.

FIG. 6 is a front view of the bag body shown in FIG. 5 in which the contents are filled and sealed.

FIG. 7A is a schematic cross-sectional view showing each part in a state of being folded into a plane shape, and FIG. 7B is a schematic cross-sectional view showing each part in a state where the bag body is filled with contents and sealed. is there.

[Explanation of symbols]

1A, 2A ... Bag body, 1 ... Mouth part, 2 ... W bottom part, 3 ... Side seal part, 5 ... Body part, 6 ... Bottom edge seal part, 7 ... Mountain fold line, 8 ... Valley fold line, 9 ... W Bottom seal part, 1
2, 22 ... throttle part, 13 ... concave part, 14, 23 ... upper end point,
15 ... 1st midpoint, 16 ... 2nd midpoint, 24 ... midpoint,
17, 25 ... Lower end point, 18, 26 ... Side seal vertical portion, 19 ... Side seal inclined portion, 20, 27 ... Intersection point between side seal vertical portion and side seal inclined portion, 21 ... Corner portion.

Claims (3)

[Claims] 1. A simple self-supporting bag made of a flexible film, comprising: a front side portion, a back side portion, and an inverted V-shaped bottom side portion between the front side portion and the back side portion, the top edge of the bag. On the left and right sides from the mouth portion to the W bottom portion, the front side portion and the back side portion, and the front side portion and the bottom. A side portion, and a back side portion and a bottom side portion each include a side seal portion formed by sealing, and by filling the contents from the mouth portion, a bottom is formed on the W bottom portion and the front side portion. And a simple self-standing bag in which the back side portion and the bottom side portion are three-dimensionally formed and which is used by sealing the front side portion and the back side portion of the mouth portion, and is provided by squeezing inward on both the left and right side seal portions. The squeezing part, When the three-dimensional simple self-supporting bag is formed by filling, the squeezing part bites inward to form recesses in the left and right side seal parts of the three-dimensional simple self-supporting bag, and the left and right sides. A seal part, a side seal vertical part provided toward the mouth part side from the intersection of the upper end of the throttle part and both left and right side seal parts, and an inner side from the upper end of the side seal vertical part to the vicinity of the mouth part A simple self-supporting bag comprising: a side seal inclined portion which is inclined and provided. 2. The throttle portion has four points, the upper end points of the left and right side seal portions, the first and second intermediate points of the front side portion and the back side portion, and the lower end points of the left and right side seal portions. 2. A trapezoidal or square shape that is connected to each other is formed.
Simple freestanding bag described in. 3. The throttling portion has a triangular shape that connects three points, that is, the upper end points of the left and right side seal portions, the intermediate point between the front side portion and the back side portion, and the lower end points of the left and right side seal portions. The simple self-supporting bag according to claim 1.