JP2001240083A - Spout mounting method for container with the spout and the spout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout mounting method and a spout adequate to the mounting method for a container with the spout capable of being securely mounted even when the wall thickness of a sealing wall constituting a fixing section of the spout is thin. SOLUTION: The spout mounting method comprises a process for inserting the fixing section 22 of the spout 20 having an annular sealing wall 22b with its outer peripheral face forming a sealing face into a spout mounting site of a container main body 10 and a process for heat pressurizing the sealing wall 22b of the fixing section 22 inserted into a spout mounting site of the container main body 10 by a sealing bar 32 from outside the container main body 10 and heat sealing the sealing wall 22b on the spout mounting site of the container main body 10. When the container main body 10 is pressurized with heat on the sealing wall 22b by the sealing bar 32, a pressure bearing member 31 is fitted onto the fixing section 22 to support the sealing wall 22b from its inner face side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spout mounting method for a spout-equipped container in which a spout is mounted on a container main body formed of a flexible sheet, and a spout suitable for the mounting method.

[0002]

2. Description of the Related Art As a container for accommodating a liquid beverage, a fluid food, a liquid detergent, various powders, and the like, a spout having a spout serving as a spout or a spout attached to a container body formed of a flexible sheet. There is a container with a spout, and such a container with a spout is usually formed of a synthetic resin.

For example, a container with a spout shown in FIG.
The lower end of a body 50a formed by superposing two exterior sheets 51 and 52 made of a synthetic resin sheet having a heat-adhesive inner surface and mutually heat-sealing the upper edge and both side edges thereof. A gusset sheet 53 made of a similar synthetic resin sheet is folded in, and a peripheral portion thereof is heat-sealed to the exterior sheets 51 and 52 to form a container body 50 having a bottom gusset portion 50b, and FIGS. As shown in b), a spout 60 integrally formed of a synthetic resin having thermal adhesiveness has a mouth portion 61 which can be opened and closed by a screw cap (not shown) and a fixing portion 62 having an annular sealing wall 62a. The sealing wall 62a of the fixing portion 62 is
The spout 60 is attached to the container body 50 by being heat-sealed to the outer sheets 51 and 52 in a state of being sandwiched between the upper edges of the outer sheets 51 and 52 forming the sheet. The annular sealing wall 62a is provided with a reinforcing member 62b.
The shape retention is given by.

[0004] The spout 60 is mounted on the container body 50 in the above-described container with a spout as follows. First, as shown in FIG.
Before heat sealing the upper edges of the exterior sheets 51, 52 forming the outer sheets 51, 52, the fixing portions 62 (the sealing walls 6) of the spouts 60 are attached to the spout mounting portions of the upper edges of the exterior sheets 51, 52.
2a).

[0005] Then, as shown in FIG. 1B, the outer sheets 51, 5 with the fixing portion 62 of the spout 60 interposed therebetween.
When the upper edges of the outer sheets 2 and 2 are heated and pressed so as to be sandwiched by a pair of seal bars A, the upper edges of the outer sheets 51 and 52 are heat-sealed to each other as shown in FIG. The spouts 51 and 52 are heat-sealed to the sealing wall 62 a of the fixing portion 62 of the spout 60, respectively, and the spout 60 is mounted on the container body 50.

[0006]

As described above, a container with a spout entirely made of a synthetic resin material is used from the viewpoint of environmental problems at the time of disposal and reduction of manufacturing costs. It is desired to reduce the material as much as possible to reduce the weight, especially,
It is desired to reduce the weight of the spout 60 which is heavier than the container body 50 formed by the flexible sheet.

However, the mouth 61 of the spout 60
Is a part to which force is easily applied when opening and closing by the screw cap. Therefore, in consideration of leakage of the contents, it is necessary to secure a certain level of strength. There is a problem in reducing the weight of 60.

For this reason, it is conceivable to reduce the thickness of the seal wall 62a constituting the fixing portion 62 or to reduce the weight of the spout 60 by omitting the reinforcing member 62b. When the spout 60 is mounted on the container main body 50 by the method, the pressing force of the seal bar A is directly applied to the seal wall 62a.
If the thickness of 2a is reduced or the reinforcing member 62b is omitted, the sealing wall 62a is easily deformed by the pressing force of the seal bar A, and the outer sheets 51 and 52 forming the container body 50 are removed. A new problem arises in that it is not possible to reliably heat seal the fixing portion 62 (seal wall 62a) of the spout 60.

SUMMARY OF THE INVENTION An object of the present invention is to provide a spout mounting method for a spout-equipped container and a spout-equipped container capable of securely mounting the spout to a container body even when the thickness of a seal wall constituting a spout fixing portion is reduced. It is to provide a spout suitable for a mounting method.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a spout-equipped container in which a spout is mounted on a container body formed of a flexible sheet. A mounting method, wherein an outer peripheral surface of the spout having an annular seal wall serving as a sealing surface is sandwiched between a spout mounting portion of the container body and the spout fixing portion of the container body. Heat-pressing the seal wall of the fixing portion from outside of the container body with a seal bar to heat-seal the seal wall to a spout mounting portion of the container body. When heat-pressing the seal wall, the pressure-receiving member having a pressure-receiving surface along the inner peripheral surface of the seal wall, There is provided a spout mounting method in spouted container, characterized in that it has to support the Lumpur wall from the inner surface side.

As described above, according to the spout mounting method for the spout-equipped container, when the spout mounting portion of the container body is heated and pressed against the seal wall of the fixing portion by the seal bar, the pressure is applied along the inner peripheral surface of the seal wall. By supporting the seal wall from the inner surface side by a pressure receiving member having a surface, the container main body and the seal wall are sandwiched between the seal bar and the pressure receiving member, so that the container main body is securely attached to the outer peripheral surface of the seal wall. Pressed, the container body and the fixed portion can be uniformly and reliably heat-sealed.

Therefore, it is not necessary to increase the thickness of the seal wall so that the seal wall is not easily deformed by the pressing force of the seal bar, and it is not necessary to separately provide a reinforcing member for the seal wall at the fixing portion. Therefore, a lightweight spout having a thin seal wall is used. The weight of the spout-equipped container can be reduced.

[0013] Further, by reducing the thickness of the seal wall constituting the fixing portion, the amount of synthetic resin material used for forming the spout is reduced, and the spout itself can be manufactured at low cost. When discarded, there is also an effect that the amount of resin material to be discarded can be minimized.

Further, by preheating the pressure receiving member, the seal wall can be heated from the inner surface side as well, so that the seal surface of the seal wall can be heated as compared with the conventional spout mounting method in which only the seal bar is used for heating. Can be heated to the melting temperature in a short time, so that the spout mounting processing time can be shortened and good sealing performance can be ensured.

Further, as in the spout mounting method according to the second aspect, the fixing portion of the spout is formed in a tapered shape so that its annular sealing wall is inclined outward toward the lower side. In the spout mounting portion of the container main body, a tapered spout mounting hole in which the fixing portion can be fitted is formed, and when the spout mounting portion is sandwiched between the spout mounting portion of the container main body, When the fixing portion is fitted into the spout mounting hole from below the container main body, the fixing portion of the spout is easily and reliably positioned at the spout mounting portion of the container main body. The spout mounting work with high accuracy,
There is an effect that it can be performed quickly.

In particular, when the above-described spout mounting method is adopted, the spout to be mounted on a container body formed of a flexible sheet, the mouth serving as a drink or a spout, A fixing portion that is heat-sealed to the spout mounting portion, wherein the fixing portion has a flexible annular sealing wall thinner than the thickness of the mouth portion, the outer peripheral surface of which is a sealing surface; A pressure-receiving member having a pressure-receiving surface along the inner peripheral surface of the seal wall when the spout mounting portion of the container main body superimposed on the outer peripheral surface of the wall is heated and pressed against the outer peripheral surface of the seal wall by a seal bar. The spout according to claim 3, which is formed so as to be fittable, is suitable.

In the spout constructed as described above, the annular sealing wall constituting the fixing portion is thinner than the thickness of the mouth,
Furthermore, since the seal wall has flexibility, even when the seal wall is slightly distorted due to uneven manufacturing, etc., when the spout mounting portion of the container body is heated and pressed against the seal wall by the seal bar, the seal bar and the pressure receiving member are not connected. With the seal wall interposed therebetween, the seal wall is easily deformed along the pressing surface of the seal bar, so that the spout mounting portion of the container body and the seal wall are reliably heat-sealed.

[0018]

Embodiments will be described below with reference to the drawings. FIGS. 1A and 1B show a spout-equipped container 1 for filling a liquid beverage, a liquid detergent, and the like. The container 1 with a spout has a container body 1 in which a lower end opening of a bag-shaped body member 11 is closed by a bottom member 12.
And a spout 20 serving as a spout or a spout attached to the container body 10.
Is an outer layer film having a thickness of about 15 μm formed of a synthetic resin film such as biaxially stretched polyamide, biaxially stretched polyester or biaxially stretched polypropylene, and having a thickness of 1 made of linear low-density polyethylene, polypropylene, etc.
It is formed of a flexible sheet on which a heat-fusible resin layer of about 00 μm is laminated.

The body member 11 is formed such that the flexible sheet cut into a predetermined shape is formed into a cylindrical shape, and then the spout 20 is sandwiched between spout mounting portions of the upper edge 11a.
The upper edge opening is closed by heat-sealing the upper edge 11a and the upper inclined edge 11b with each other, and the lower edge opening of the body member 11 is made of unstretched polyester film or polyamide film made of polyethylene or polypropylene. Heat-adhesive resin layers having a thickness of, for example, 1
Using a flexible sheet having a thickness of about 00 to 500 μm, the bottom member 12 formed by pressurizing the bottom member 12 into a reverse basin shape having a rising edge on the periphery thereof is inserted, and the rising edge of the bottom member 12 and the lower end of the body member 11 are inserted. Are closed by heat sealing. In FIG. 3A, a region indicated by oblique lines is a heat sealing region.

As shown in FIG. 2A, the spout 20 is an injection-molded article using the same kind of synthetic resin as the heat-fusible resin layer of the flexible sheet forming the container body 10, It comprises a cylindrical opening 21 that can be opened and closed by a screw cap (not shown), and a fixing portion 22 that is heat-sealed to the upper edge 11 a of the body member 11.

As shown in FIGS. 2B and 2C, the fixing portion 22 has an upper surface plate 22a on which the mouth portion 21 is continuously provided, and a tapered shape outward from the periphery of the upper surface plate 22a. And an annular sealing wall 22b whose outer peripheral surface is a sealing surface and which extends downward. The sealing wall 22b has a convex rib 22c formed on the outer peripheral surface thereof. The thickness of the sealing wall 22b is, for example, 0.1 to 1.0 m.
m, preferably 0.1 to 0.5 mm.
It is thinner than the wall thickness and has such flexibility as to be easily deformed.

A method of manufacturing the container 1 with spout configured as described above will be described below. First, the body member 11, the bottom member 12, and the spout 20 constituting the container body 10 are manufactured in separate steps. As for the body member 11, as described above, after the flexible sheet cut into a predetermined shape is formed into a cylindrical shape, only the upper inclined edge 11b is heat-sealed in advance (see FIG. 3).

As shown in FIG. 3, the upper end portion of the upper inclined edge 11b of the body member 11 has an inclination angle along the corner of the sealing wall 22b of the fixing portion 22 of the spout 20, as described above. By heat-sealing the upper inclined edge 11b with a constant width, a spout mounting hole P is formed at the upper end of the body member 11, into which a tapered annular sealing wall 22b can be fitted. .

Next, as shown in FIG. 4A, a metal pressure receiving member 31 having a pressure receiving surface 31a extending along the inside of the seal wall 22b of the fixing portion 22 of the spout 20 is provided.
The fixing portion 22 of the spout 20 is fitted (see FIG. 4B). Since the pressure receiving member 31 has a convex portion 31b formed on the upper surface thereof to be fitted to the mouth portion 21, the spout 20 can be positioned with respect to the pressure receiving member 31 by fitting the convex portion 31b to the mouth portion 21. It is done reliably.

Next, the body member 11 in which the upper inclined edge 11b is heat-sealed with each other is placed over the spout 20 in which the fixing portion 22 is fitted in the pressure receiving member 31, from the opening at the lower end thereof, so that the spout mounting hole is formed. Spout 20 on P
Is inserted, as shown in FIG.
Of the trunk member 11 is fitted into the spout mounting hole P.
The fixing portion 22 of the spout 20 is securely positioned at the spout mounting portion.

As shown in FIGS. 5A and 5B, a pair of seal bars 32 heated to about 150 to 190.degree. By sandwiching the edge, the sealing wall 2
When the body member 11 is heated and pressed on the outer peripheral surface of the body member 2b,
1 is heat-sealed to the outer peripheral surface of the seal wall 22b of the fixing portion 22, and the spout 20 is attached to the body member 11, as shown in FIG. At this time, the pressure receiving member 31 is heated to about 30 to 80 ° C.

The pressure receiving member 31 is removed from the fixing portion 22 of the spout 20 by lifting the body member 11 on which the spout 20 is mounted as described above.
When the bottom member 12 is heat-sealed to the opening at the lower end of the body member 11 to which is attached, the container 1 with spout as shown in FIGS. 1 (a) and 1 (b) is completed.

As described above, when the seal bar 32 heats and presses the spout mounting portion of the container body 10 (body portion 11) against the sealing wall 22b of the fixing portion 22 of the spout 20, the fixing portion 22 of the spout 20 receives pressure. By being fitted into the member 31, the container body 10 and the seal wall 22b are sandwiched between the seal bar 32 and the pressure receiving member 31, so that the seal wall 22b is thinner than the thickness of the mouth 21 and is flexible. Even if the spout 20 has the container body 10, the flexible sheet forming the container body 10 is surely pressed against the outer peripheral surface of the seal wall 22b, and the container body 10
And the fixing portion 22 (seal wall 22b) can be uniformly and reliably heat-sealed.

Therefore, when such a spout mounting method is adopted, the seal wall of the fixing portion is made thicker so that the seal wall is not easily deformed by the pressing force of the seal bar as in the conventional spout, or the shape of the seal wall is maintained. It is not necessary to separately provide a reinforcing member for increasing the strength of the fixing portion, and it is possible to use a lightweight spout 20 having a small thickness of the seal wall 22b, and the weight of the spout-equipped container 1 can be reduced.

Further, by reducing the thickness of the seal wall 22b forming the fixing portion 22, the amount of synthetic resin material used to form the spout 20 is reduced, so that the spout 20 itself can be manufactured at low cost. In addition, when the spout 20 is discarded, there is an effect that the amount of discarded synthetic resin material can be minimized.

Although the sealing wall 22b is formed thin, a flexible sheet on which a stretched film having strength such as a biaxially stretched polyester film, polyamide film or polypropylene film is laminated is heat-sealed. However, this portion does not become weak, and sufficient strength can be secured.

Further, as described above, by pre-heating the pressure receiving member 31, the seal wall 22b is also heated from the inner surface side, so that compared to the conventional spout mounting method in which only the seal bar is used to heat the seal wall 22b. The sealing surface of the sealing wall 22b rises to the melting temperature in a short time, and the spout 2
0 can be efficiently performed in a short time, and the sealing performance is improved.

Further, since the spout 20 is manufactured by the injection molding method, the sealing wall 22b may be slightly distorted due to cooling or the like. Since the seal wall 22b is thinner and has flexibility, the seal wall 22b is sandwiched between the seal bar 32 and the pressure receiving member 31, so that the distorted seal wall 22b can be easily formed along the pressing surface of the seal bar 32. It is deformed, and the spout mounting portion of the container body 10 and the seal wall 22
b is surely heat-sealed.

In the embodiment described above, the container body 1
0, the fixing portion 22 of the spout 20
The seal bar 32 heats and presses from the side, but is not limited to this. For example, as shown in FIG. 7, depending on the shape of the fixing portion 22 of the spout 20, the spout 20 may be fixed by the seal bar 32. It is also possible to heat and press from above the part 22.

In the above embodiment, the container body 1
The upper inclined edge 11 of the body 11 of the container body 10 so that the spout 20 can be easily positioned with respect to the spout 20.
b is heat-sealed in advance to form a spout mounting hole P in which the fixing portion 22 of the spout 20 can be fitted in the body 11 of the container body 10, but the present invention is not limited to this. Depending on the shape of the container body, the spout fixing portion is sandwiched in a state where it is aligned with the spout mounting portion on the upper edge of the container body that is not heat-sealed, and the upper edges of the container body and the upper edge of the container body and the spout are fixed. The parts may be heat-sealed at the same time.

In the above-described embodiment, when the seal bar 32 is heated and pressed, the pressure receiving member 31 is set at 30-8.
Although it is heated to about 0 ° C., it is not always necessary to heat the pressure receiving member 31. However, as described above, the spout 20 can be efficiently mounted by heating the pressure receiving member 31 in advance.

In the above-described embodiment, the lower end opening of the body member 11 formed of a flexible sheet into a cylindrical shape is
The spout-equipped container 1 in which the spout 20 is mounted on the container body 10 of the type closed by the bottom member 12 made of a flexible sheet formed by air-pressure molding has been described. However, the present invention is not limited to this. Needless to say, the spout mounting method and spout of the present invention can be applied to the case where spouts are mounted on pouch containers such as side gusset bags or bottom gusset bags. In the case of a bottom gusset bag, the bottom gusset sheet is attached after the spout is attached.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing a spout-equipped container manufactured by the spout mounting method according to the present invention,
(B) is a side view which shows the container with a spout same as the above.

2A is a perspective view showing a spout used in the container with a spout according to the embodiment, FIG. 2B is a bottom view showing the spout according to the embodiment, and FIG. 2C is a view taken along line XX of FIG. It is sectional drawing.

FIG. 3 is a plan view showing a body portion of the container body in the container with a spout according to the first embodiment.

FIGS. 4A to 4C are process diagrams showing a spout mounting method of the present invention.

5A is a cross-sectional view showing a spout heat sealing step in the spout mounting method of the present invention, and FIG. 5B is a cross-sectional view taken along line YY in FIG. 5A.

FIG. 6 is a plan view showing a body of the container body to which the spout is mounted.

FIG. 7 is a cross-sectional view showing a spout heat sealing step which is another embodiment of the spout mounting method of the present invention.

FIG. 8 is a plan view showing an example of a container with a spout.

FIG. 9A is a side view showing a spout used for the container with a spout according to the embodiment, and FIG. 9B is a bottom view showing the spout according to the embodiment.

FIGS. 10A to 10C are process diagrams showing a method of attaching a spout to a container body in the container with a spout according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container with spout 10 Container main body 11 Body member 12 Bottom member 20 Spout 21 Mouth 22 Fixed part 22b Seal wall 31 Pressure receiving member 31a Pressure receiving surface 32 Seal bar P Spout mounting hole

Claims (3)

[Claims] 1. A method for mounting a spout on a container body of a spout-equipped container in which a spout is mounted on a container body formed of a flexible sheet, comprising an annular seal wall having an outer peripheral surface serving as a seal surface. Sandwiching the fixed portion of the spout in a spout mounting portion of the container main body; and heating and pressing the seal wall of the fixed portion sandwiched in the spout mounting portion of the container main body from outside of the container main body by a seal bar. Heat-sealing the sealing wall to the spout mounting portion of the container main body, and when the container main body is heated and pressed against the sealing wall by the seal bar, the sealing wall follows the inner peripheral surface of the sealing wall. A spout wherein the seal wall is supported from the inner surface side by a pressure receiving member having such a pressure receiving surface. How to attach a spout to a container with a container. 2. The fixing portion of the spout is formed in a tapered shape so that an annular sealing wall thereof is inclined outward toward a lower side, and the fixing portion is attached to a spout mounting portion of the container body. A spout mounting hole in which a portion can be fitted is formed in a tapered shape. When the fixing portion of the spout is sandwiched between spout mounting portions of the container main body, the fixing portion is formed from a lower side of the container main body. The spout mounting method according to claim 1, wherein the spout mounting hole is fitted into the spout mounting hole. 3. A spout mounted on a container body formed of a flexible sheet, comprising: a mouth serving as a drinking mouth or a spout; and a fixing portion heat-sealed to a spout mounting portion of the container body. The fixing portion has a flexible annular sealing wall thinner than the thickness of the mouth, the outer peripheral surface of which is a sealing surface, and the spout of the container body superimposed on the outer peripheral surface of the sealing wall. A spout formed such that a pressure receiving member having a pressure receiving surface extending along the inner peripheral surface of the seal wall can be fitted when the mounting portion is heated and pressed against the outer peripheral surface of the seal wall by a seal bar.