JP2001270534A - Bottomed pouch-shaped container and its processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottomed pouch-shaped container which is excellent in standing stability, and to provide a processing method for bottomed pouch- shaped container wherewith a bottom member can be attached simply and neatly to a truck member even in the case where the bottom member is attached after a spout is attached to the trunk member. SOLUTION: The bottomed pouch-shaped container is composed of a tubular trunk member 10 formed of a flexible sheet, a bottom member 20 formed of a thick flexible sheet and a spout 30 which can be opened and closed by a screwed cap 31, and the trunk member 10 is made up in a shape wherein the upper part whereon the spout 30 is attached is formed flat and the lower part whereto the bottom member 20 is attached is formed cylindrically. The lower end edge 12 of the trunk member 10 is formed in a gentle unevenness so that the lower end edge 12 can be fitted to a plane to be approximately flush with the trunk member and in a form which projects slightly downward beyond the lower end of the attached bottom member 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-like container with a bottom, comprising a bag-shaped body member formed of a flexible sheet, and a bottom member for closing a lower end opening of the body member.
In particular, the present invention relates to a bottomed bag-like container having excellent self-standing stability.

[0002]

2. Description of the Related Art Containers for containing liquids, powders, jellies and the like are disclosed in Japanese Patent Application No. 11-258313 filed on Sep. 13, 1999 by the present applicant. There is a bottomed bag-shaped container described in the description and drawings.

[0003] This bag-like container with a bottom is shown in FIG.
As shown in (b), it can be opened and closed by a cylindrical body member 51 formed of a flexible sheet, a circular inverted tray-shaped bottom member 52 formed by pressure-forming a thick flexible sheet, and a screw cap 53a. And the body member 51 has a spout 5 at its upper end opening.
3 is heat-sealed at a predetermined width in a state where it is sandwiched, so that the upper side is shaped into a flat shape, and the bottom member 52 is fitted into the lower end opening and heat-sealed, so that the lower end opening is formed. It is closed.

In order to manufacture the bottomed bag-shaped container 50 constructed as described above, first, both ends of a rectangular flexible sheet having a heat adhesive property on its inner surface are abutted with each other.
A tubular body member 51 is formed by applying a heat-adhesive tape to the butted portion from the inner surface side.

[0005] Next, the body member 51 is folded flat and the upper inclined edges 51a formed by diagonally cutting the left and right upper corners are heat-sealed to each other. The spout 53 is sandwiched and heat-sealed to the upper edge 51b of the body member 51.

[0006] Finally, the bottom member 52 is fitted into the lower end opening of the body member 51 and heat-sealed to the inner peripheral surface of the body member 51 to form a bag with a bottom as shown in FIGS. 6 (a) and 6 (b). The container 50 is completed.

[0007]

As described above, this bag-like container 50 with a bottom is formed by forming a rectangular flexible sheet into a cylindrical shape once and then forming the upper inclined edge 51a.
Are heat-sealed with each other and the spout 53 is
1b, the upper side of the body member 51 is shaped into a flat shape, so that when the bag-like container 50 with the bottom is viewed from the side, as shown in FIG. The central portion of the lower end edge in the width direction is curved so as to slightly project downward, and when viewed from the front side or the back side, as shown in FIG.
The center of the lower end edge in the width direction is curved so as to be slightly depressed upward.

Therefore, when the bag-like container 50 with a bottom is made to stand on a flat mounting surface, as shown in FIG. 7 (a), the center of the body member 51 in the width direction on the front side or the back side is formed. Since the body member 51 is lifted off the mounting surface and the trunk member 51 swings in the front-rear direction as shown by a dashed line in FIG. 8, there is a problem that self-standing stability is poor. In particular, the spout 53, which is heavier than the trunk member 51,
Since it is mounted on the upper part of 1, the self-reliant stability is remarkably reduced as the content decreases.

As described above, when the bottom member 52 is mounted on the body member 51 after the spout 53 is mounted on the body member 51, the bottom member 52 is mounted on the lower end opening of the body member 51 at the stage of mounting. The lower edge of the body member 51 is already in FIG.
Since the bottom member 52 has a shape as shown in (a) and (b), the lower end of the bottom member 52 is formed in a flat shape, and the lower end of the bottom member 52 is formed along the lower end edge of the trunk member 51. There is also a problem that it is difficult to attach it neatly to 51.

Regarding such a problem, before the spout 53 is mounted on the body member 51, that is, at the stage where the body member 51 can be made completely cylindrical, the bottom member 52 is placed in the lower end opening of the body member 51. It can be solved to some extent by wearing it, but it is not enough, and like this,
If the bottom member 52 is attached to the body member 51 first, the body member 51 will have a three-dimensional shape. Conversely, heat sealing between the upper inclined edges 51a and heat between the upper edge 51b and the spout 53 will be described. There is a problem that the workability of the seal deteriorates.

An object of the present invention is to provide a bag-like container with a bottom having excellent self-standing stability, and to make the bottom member simple and neat even when the bottom member is mounted after the spout is mounted on the body member. An object of the present invention is to provide a method for manufacturing a bag-like container with a bottom that can be attached to a body member.

[0012]

Means for Solving the Problems and Their Effects In order to solve the above problems, the present invention comprises a cylindrical body member formed of a flexible sheet, and a bottom member which is a synthetic resin molded product. The upper portion of the body member is formed flat by heat-sealing the edges thereof with the spout sandwiched in the upper end opening, and the bottom member is fitted in the lower end opening to heat the spout. By sealing, in a bag-like container with a bottom whose lower end opening is closed, the lower edge of the body member is made uneven in such a manner that the lower edge of the body member contacts the same plane at least at four places in front, back, left and right. It was formed in.

[0013] In the bag-like container with the bottom configured as described above, the lower edge of the body member is at least four front, rear, left and right.
Since the lower end edge of the body member is formed in an irregular shape so as to be in contact with the same plane at the location, the container itself does not rattle back and forth in a self-standing state, and it is possible to ensure good self-supporting stability. it can.

According to a second aspect of the present invention, when the lower edge of the body member is projected downward from the lower end of the bottom member, the bottom member is formed on the inner surface of the body member. Even when the melted heat-adhesive resin protrudes downward from the lower end of the bottom member during heat sealing, the protruded heat-adhesive resin protrudes downward from the lower end of the bottom member. Concealed, the bag-like container with the bottom can be finished neatly, and the touch of the lower edge of the body member does not deteriorate.

Further, as in the bag-like container with a bottom according to the third aspect, if the lower end edge of the body member is formed in an uneven shape so that the end face is finely wavy, it becomes free standing. The effect is obtained that the bag-like container with the bottom becomes less slippery and that the lower end edge of the body member is less likely to cut a hand.

According to a fourth aspect of the present invention, after the spout is sandwiched in the upper end opening of the cylindrical member formed of the flexible sheet and heat-sealed,
In a method of manufacturing a bottomed bag-shaped container in which a bottom member, which is a synthetic resin molded product, is fitted and heat-sealed in a lower end opening of the body member, the step of heat-sealing the bottom member to the body member is performed. When the lower end edge of the body member is formed in an uneven shape so that the lower end edge of the body member is substantially in contact with the same plane, a bottom member whose lower end is formed in a flat shape is attached to the body member. However, simply by fitting the bottom member into the lower end opening of the body member, the lower end of the bottom member naturally follows the lower edge of the body member, and the bottom member is easily and cleanly heated to the body member. Can be sealed.

[0017]

Embodiments will be described below with reference to the drawings. As shown in FIGS. 1 (a), 1 (b) and 1 (c), this bag-like container 1 with a bottom has a cylindrical body member 10 formed of a flexible sheet and a bottom member which is a synthetic resin molded product. 20 and a spout 30 that can be opened and closed by a screw cap 31. The body member 10 has a flat upper portion on which the spout 30 is mounted.
The lower side on which the bottom member 20 is mounted is shaped into a cylindrical shape.

As shown in FIG. 1C, the upper side of the body member 10 is formed into a flat shape by heat sealing the left and right upper inclined edges 11 with a predetermined width. The spout 30 is inserted into the upper end opening 10a formed between the upper inclined edges 11, and
Is heat sealed to the inner surface of the
, A bottom member 20 is fitted therein and is heat-sealed to the inner surface of the body member 10. In FIG. 3A, a region indicated by oblique lines is a heat sealing region.

When the flexible sheet forming the cylindrical body member 10 is developed, it becomes substantially rectangular as shown in FIG. 2 (a), and its lower edge 12 is shown by a two-dot chain line in FIG. Instead of being formed in a perfect straight line as shown by the arrow, the central part in the width direction of the front part and the back part of the cylindrical body member 10 is slightly downward as shown by the solid line in FIG. As shown in FIG. 1 (c), the cylindrical body member 10 is formed to have a flat shape and the lower side is formed into a flat shape, and the lower side is formed into a cylindrical shape. The lower edge 12 is in contact with the same plane.

Accordingly, when the trunk member 10 is folded flat, the lower end edge 12 of the trunk member 10 is, as shown in FIG. 2B and FIG. Is slightly projected downward.

As the flexible sheet S forming the body member 10, a laminated sheet having a heat-adhesive resin layer on the inner surface side, for example, a synthetic resin film such as biaxially oriented polyamide, biaxially oriented polyester or biaxially oriented polypropylene A laminate sheet having a thickness of about 100 to 150 μm, in which a heat-adhesive resin layer made of linear low-density polyethylene, polypropylene, or the like is laminated on the outer layer film formed by the above method, is used. In addition, it is also possible to laminate a gas barrier layer inside the outer layer film.

In the process of manufacturing the body member 10, as a method of forming the flexible sheet into a cylindrical shape, the edges of one flexible sheet are butted against each other, and the abutting portion is heated from the inner surface side. Adhesive tapes are attached, and the edges of synthetic resin sheets having the same kind of heat-adhesive resin layer on both sides are overlapped with each other, and the overlapped portions are heat-adhered. It is also possible to employ various methods, such as superposing two synthetic resin sheets having the following formulas, and thermally bonding the side edges thereof, and it is also possible to use a seamless tube.

The bottom member 20 is formed by pressure forming a flexible sheet such as a synthetic resin sheet.
As shown in (b) and (c), the bottom plate 21 is composed of a disk-shaped bottom plate 21 and an annular peripheral wall 22 hanging downward from the peripheral edge of the bottom plate 21. The inner peripheral surface is heat-sealed.

The flexible sheet used for molding the bottom member 20 is a single sheet having a heat-adhesive resin layer provided on the outer peripheral surface side of the peripheral wall 22 to adhere to the inner surface of the synthetic resin sheet forming the body member 10. Thermal bonding made of linear low-density polyethylene or the like to an outer layer film formed of a stretchable synthetic resin film such as unstretched polypropylene, unstretched polyester or unstretched polyamide, etc. Thickness 200 with conductive resin layer laminated
A thick laminated sheet of about 500 μm or the like is used.

The spout 30, as shown in FIG. 1 (c), is an injection-molded article using the same kind of synthetic resin as the heat-adhesive resin layer constituting the flexible sheet forming the body member 10. A cylindrical mouth (not shown) which can be opened and closed by a screw cap 31;
a and a fixing portion 32 that is heat-sealed.

The bottomed bag-shaped container 1 configured as described above is manufactured as follows. First, FIG.
As shown in (a), the both ends of the long strip-shaped flexible sheet S are abutted to each other, and a heat-adhesive tape P is attached to the abutted portion from the inner surface side to form a tubular shape.

This is folded in a flat state as shown in FIG. 2B and cut sequentially along cutting lines C1 and C2 indicated by dashed lines, thereby torso member 10 as shown in FIG. Is cut off. At this time, the lower edge 12 of the body forming base material M is as shown in FIG.
As shown in (b) and (c), it is formed in gentle irregularities.

Next, in this body forming base material M, FIG.
After heat sealing the area shown by the oblique line in (c), the upper corner outside the heat sealing part is cut off,
As shown in FIG. 2D, a body member 10 having a heat-sealed upper inclined edge 11 is completed.

Then, as shown in FIG. 2E, the fixing portion 32 of the spout 30 is inserted into the upper end opening 10a formed between the heat-sealed upper inclined edges 11 to insert the upper edge of the body member 10. After the heat sealing, the lower end opening 10b of the body member 10 is opened in a cylindrical shape, and the bottom member 20 is positioned above the lower end edge 12 of the body member 10 as shown in FIG. Then, when the peripheral wall 22 is heat-sealed to the inner surface of the body member 10, the bag-like container 1 with the bottom shown in FIG. 1A is completed.

The bottom-shaped bag-like container 1 configured as described above has its lower edge 12 gently so that the widthwise central portions of the front and rear portions of the body member 10 slightly protrude downward. The body member 10 is formed in such a manner that the upper side is flat and the lower side is cylindrical.
Since the lower end edge 12 of the body member 10 is in contact with the same plane in a state in which the body member is shaped, the body member is formed by using a rectangular flexible sheet whose lower end edge is cut linearly in the unfolded state. Like a bag-like container with a bottom that is formed,
There is an effect that good independence stability can be secured without rattling in the front-rear direction in a self-standing state.

As described above, even when the bottom member 20 is mounted on the body member 10 after the spout 30 is mounted on the body member 10, as described above, the lower edge 1
When the bottom member 20 is attached to the body member 10 by forming the body member 2 in a gently uneven shape, the body member 1 has already been formed.
0, the lower edge 12 is substantially in contact with the same plane. Therefore, even when the bottom member 20 having a flat lower end is attached to the body member 10, the bottom member 20 is connected to the lower end of the body member 10. The bottom member 20 is simply inserted into the opening 10a.
The bottom end of the bottom member 20 naturally follows the lower end edge 12 of the body member 10, and the bottom member 20 can be easily and cleanly heat-sealed to the body member 10.

Further, in the bag-like container 1 with a bottom, the lower end edge 12 of the body member 10 is protruded below the lower end of the bottom member 20. Therefore, as shown in FIG. Even if the melted heat-adhesive resin protrudes from the lower end of the bottom member 20 to the lower side when heat-sealing to the inner surface of the member 10, the protruded heat-adhesive resin X remains
Concealed by the lower end of the body member 10 protruding downward from the lower end of the body member 10, so that the heat-sealed portion of the bottom member 20 can be neatly finished, and the lower edge 12 of the body member 10 can be finished.
Does not feel bad.

In the embodiment described above, the body member 10
The lower end edge 12 is formed in a gently uneven shape. However, as shown in FIGS. 5A and 5B, if the end surface of the lower end edge 12a is formed in a more undulating uneven shape, The effect that the bag-like container 1 with a bottom becomes less slippery when it is made to stand on its own and that it is harder to cut a hand at the lower edge 12a of the body member 10 is obtained. However, like this,
Needless to say, even when fine unevenness is formed on the lower end edge 12a, the entire lower end edge 12a must be formed with gentle unevenness.

As shown in FIGS. 5A and 5B,
The upper inclined edge 11a of the body member 10 also has a lower edge 12a.
As in the case of a, if the end face is formed in a finely wavy uneven shape, an effect is obtained that it is difficult to cut a hand at the upper inclined edge 11a of the body member 10.

In the above embodiment, the body member 10
When the upper side is shaped flat and the lower side is shaped cylindrical, the lower edge 12 is cut into gentle irregularities so that the lower edge 12 is in contact with the same plane, but is not limited thereto. Rather than the thing, at least in the entire circumference of the lower end edge of the cylindrical body member, if it is cut into a shape such that there is a portion that is in contact with the same plane at each of the front, rear, left and right, it will be self-supporting It is possible to prevent rattling when the vehicle is hit.

In the above-described embodiment, the body member 10 having the upper inclined edge 11 heat-sealed to each other is employed. However, the present invention is not limited to this, and the upper inclined edge 11 may be formed. Instead, it is also possible to employ a body member that simply heat seals the upper edges with each other with the spout sandwiched in the upper end opening.

In the above embodiment, the body member 10
Member 2 having a circular bottom plate 21 at the lower end opening 10b thereof
0 is attached, but is not limited to this. For example, a square shape, a hexagonal shape, an elliptical shape, etc.
Bottom members having bottom plates of various shapes can be used. However, it goes without saying that the lower edge of the body member 10 must be formed in an uneven shape in accordance with the shape of the bottom member used.

Further, in the above-described embodiment, the inverted tray-shaped bottom member 20 is used. However, the present invention is not limited to this, and a tray-shaped bottom part in which an annular peripheral wall rises upward from the peripheral edge of the bottom plate. It is also possible to use wood.

In the above-described embodiment, the bottom member 20 is formed by pressure-forming the flexible sheet. However, the bottom member 2 is formed by injection molding of a synthetic resin or another molding method.
It is also possible to form 0. However, it is preferable that the bottom member 20 obtained by forming the above-described multilayer laminate sheet by a sheet forming method such as pressure forming has appropriate flexibility and strength.

In the above-described embodiment, the portion corresponding to the upper inclined edge 11 is heat-sealed after the body-forming base material M is cut off. However, the present invention is not limited to this. At the stage shown in FIG. 3 (b), first, after the portion corresponding to the upper inclined edge 11 is heat-sealed, the trunk portion forming base material M may be cut off, and at the stage shown in FIG. After the portion corresponding to the inclined edge 11 is heat-sealed, the upper corner may be cut off at the same time when the trunk portion forming base material M is cut off.

[Brief description of the drawings]

1 (a) is a perspective view showing an embodiment of a bag-like container with a bottom according to the present invention, FIG. 1 (b) is a side view showing the bag-like container with a bottom, and FIG. It is a disassembled perspective view which shows a bag-shaped container.

FIG. 2A is a plan view showing a state in which the trunk member of the bag-like container with a bottom is unfolded, and FIGS. 2B and 2C are partial front views showing a state in which the trunk member is folded flat. And a partial rear view.

3 (a) to 3 (e) are process diagrams showing a method for producing a bag-like container with a bottom according to the embodiment.

FIG. 4 is a cross-sectional view showing a mounting state of a bottom member in the bag-like container with a bottom according to the first embodiment.

FIG. 5 (a) is a perspective view showing a bag-like container with a bottom according to another embodiment, and FIG. 5 (b) is a side view showing the bag-like container with a bottom according to the embodiment.

FIG. 6 (a) is a perspective view showing an example of a bag-like container with a bottom, and FIG. 6 (b) is a side view showing the bag-like container with a bottom.

FIG. 7A is a lower side view showing the above-described bottomed bag-shaped container, and FIG. 7B is a lower front view showing the same bottomed bag-shaped container.

FIG. 8 is an explanatory diagram for explaining rattling of the bag-like container with a bottom according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag-like container with a bottom 10 Body member 10a Upper end opening 10b Lower end opening 11, 11a Upper inclined edge 12, 12a Lower edge 20 Bottom member 21 Bottom plate 22 Peripheral wall 30 Spout 31 Screw cap 32 Fixing portion

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AE20 GA10 HF09 HG07 HM01 HN65 3E075 BA46 CA01 DD13 DD42 DD43 DE03 GA04 GA05

Claims (4)

[Claims] 1. A tubular body member formed of a flexible sheet, and a bottom member that is a synthetic resin molded product, wherein the body member has an edge portion with a spout sandwiched in an upper end opening. By heat-sealing each other, the upper side is formed in a flat shape, and the bottom member is fitted into the lower end opening and heat-sealed,
In a bag-like container with a bottom having a closed lower end opening, the lower edge of the body member is formed in an uneven shape so that the lower edge of the body member is in contact with the same plane in at least four front, rear, left, and right positions. A bag-like container with a bottom, characterized in that: 2. The bag-like container with a bottom according to claim 1, wherein the lower end edge of the body member protrudes below the lower end of the bottom member. 3. The bag-like container with a bottom according to claim 1, wherein the lower end edge of the body member is formed in an uneven shape so that the end face is finely wavy. 4. A spout is inserted into an upper end opening of a cylindrical member formed of a flexible sheet and heat-sealed, and then a bottom member, which is a synthetic resin molded product, is fitted into the lower end opening of the trunk member. In the method for manufacturing a bag-like container with a bottom that is heat-sealed, the bottom member is heat-sealed to the body member so that a lower end edge of the body member contacts substantially the same plane. A method for manufacturing a bottomed bag-shaped container, wherein a lower edge is formed in an uneven shape.