JP7371332B2 - Gusseted pouch and method for manufacturing gusseted pouch - Google Patents

Description

The present invention relates to a gusseted pouch having a gusseted portion and a method for manufacturing a gusseted pouch.

BACKGROUND ART Conventionally, a bag-like gusseted pouch formed from a resin film is known as a container for storing fluid contents such as drinking water (see, for example, Patent Document 1).

Furthermore, as disclosed in Patent Document 1, a gusseted pouch is used in a so-called back-in-box format during use (pour out the contents), display, transportation, etc. It is also known to accommodate and operate a gusseted pouch inside.

Japanese Patent Application Publication No. 2012-121611

However, since the resin film constituting such a gusseted pouch has flexibility, especially when a gusseted pouch is formed with a large capacity, the fluidity of drinking water, etc., as shown in FIG. Due to the weight of the contents, the lower part of the pouch body may bulge, which is called bulging.

If the above-mentioned bulge occurs, it is necessary to secure a large installation space for the gusseted pouch during use, display, transportation, etc., and when operating in a bag-in-box format, it is necessary to In consideration of the bulge of the pouch, it is necessary to provide strength to the outer case.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and aims to provide a gusseted pouch and a method for manufacturing a gusseted pouch that has a simple configuration and reduces the installation space. be.

The gusseted pouch of the present invention is a gusseted pouch having a gusseted portion, and includes a pouch body, an inner support member disposed within the pouch body, and the pouch body includes a content storage portion, The inner supporting member has a first fixed part and a second fixed part facing each other with the content storage part in between, and the inner support member has a first fixed part fixed to the first fixed part and a second fixed part. a second fixed part fixed to the fixed part, the inner supporting member is made of a resin film having a heat welding layer, and the first fixed part is heat welded to the first fixed part. The second fixed part is fixed to the second fixed part by heat welding, and the pouch body includes a front side film, a back side film, and a sealing part for forming the pouch body into a bag shape. The first fixing part is disposed between the front side film and the back side film in the sealing part, and is heat welded to the front side film and the back side film, and the sealing part has a handle hole. is formed, and at least a portion of the handle hole is formed so as to pass through a portion where the front side film, the back side film, and the first fixed portion overlap, thereby solving the above problem. be.
Further, the gusseted pouch of the present invention is a gusseted pouch having a gusset portion, and includes a pouch body and an inner support member disposed within the pouch body, and the pouch body has a content storage portion. and a first fixed part and a second fixed part facing each other with the content storage part in between, and the inner support member has a first fixed part fixed to the first fixed part, and a first fixed part fixed to the first fixed part, and a first fixed part fixed to the first fixed part. a second fixed part fixed to a second fixed part, the pouch main body has a front side film, a back side film, and a gusset part film, and the gusset part film is folded in half. , disposed between the front side film and the back side film with the bent portion thereof facing the content storage section side, and at least one of both ends of the gusset film in the longitudinal direction, the The gusset film is bent diagonally with respect to its longitudinal direction so that the corner of the gusset film located on the content storage side is closer to the outside of the pouch body. , which solves the above problem.
Further, the method for manufacturing a gusseted pouch of the present invention is a method for manufacturing a gusseted pouch in which an inner supporting member is disposed within a pouch body, and the resin film is disposed between a front side film and a back side film constituting the pouch body. By arranging the inner support member consisting of the above in a folded state, and sandwiching the front side film, the back side film, and the inner side support member with a heat welding jig, a bond between the opposing surfaces of the front side film and the inner side support member is The method includes the step of thermally welding a partial region and also thermally welding a partial region between opposing surfaces of the back side film and the inner support member, and in the step, between the inner surfaces of the inner support member folded in half. The above problem is solved by arranging the baffle plate.

According to the inventions according to claims 1 and 7 , the inner supporting member prevents the first fixed portion and the second fixed portion of the pouch body facing each other with the content storage portion in between from separating from each other. Since this is possible, the overall shape of the gusseted pouch containing the contents is maintained, and so-called body bulge, which occurs when the lower part of the pouch body swells due to the weight of fluid contents such as drinking water, is suppressed. be able to. This reduces the installation space for gusseted pouches during use, display, transportation, etc., and when operating gusseted pouches in a bag-in-box format, It is possible to eliminate the need for the case to have high strength.
Furthermore, according to the invention according to claim 1, it is possible to fix the first fixed part and the second fixed part to the pouch main body by heat welding, which is also used when forming the pouch main body. It can reduce the burden.
Further, at least one of the first fixed part and the second fixed part is disposed between the front side film and the back side film in the sealing part for forming the pouch body into a bag shape, and is attached to the front side film and the back side film. Heat welded. As a result, it is possible not only to fix the first fixed part or the second fixed part to both the front side film and the back side film and improve the fixing strength of the first fixed part or the second fixed part to the pouch body, but also to improve the fixing strength of the first fixed part or the second fixed part to the pouch body. Since it is possible to form the seal portion for forming the main body into a bag shape and to fix the first fixing portion or the second fixing portion to the pouch body at the same time, the manufacturing burden can be reduced. In addition, the strength of the part where the first fixed part or the second fixed part is arranged between the front side film and the back side film is high, so when using, displaying, or transporting, the part where the first fixed part or the second fixed part is arranged between the front side film and the back side film is The self-supporting nature of the gusseted pouch can also be improved by placing it on the placement surface with the part where the first fixing part or the second fixing part is placed facing down.
Furthermore, at least a portion of the handle hole formed in the seal portion is formed so as to penetrate through the overlapped portion of the front side film, the back side film, and the first fixing portion, thereby increasing the strength of the edge of the handle hole. Since it is possible to sufficiently secure the handle hole, deformation and tearing of the edge of the handle hole can be suppressed .

According to the invention according to claim 2, the inner support member has a hole-shaped or notch-shaped circulation portion for distributing the contents, thereby dividing the inside of the contents storage portion into a plurality of spaces. Even when the inner support member is installed in this way, it is possible to ensure the flow of the contents within the contents storage section, and therefore it is possible to maintain good pouring of the contents.
According to the invention according to claim 3 , it is possible to prevent the third fixed portion and the fourth fixed portion of the pouch body, which face each other with the contents storage portion in between, from separating from each other by the inner supporting member. Therefore, the overall shape of the gusseted pouch containing the contents can be maintained more reliably.
According to the invention according to claim 4 , the first fixing part and the second fixing part are arranged so that the heat welding layer faces the front side film and the back side film in the sealing part for forming the pouch body into a bag shape. The third fixing part is placed between the front film and the back film in a state of being folded in two, and is heat welded to the front film and the back film. 4. The fixing part is thermally welded to the inner surface of the backside film. As a result, the first to fourth fixed parts can be thermally welded to the pouch body at the same time, and the seal part for forming the pouch body into a bag shape can be formed and the first to fourth fixed parts to the pouch body can be thermally welded to the pouch body. Heat welding can also be performed at the same time.
According to the invention according to claim 5 , the first fixed part is fixed to the inner surface of the front film, and the second fixed part is fixed to the inner surface of the back film, so that the front film and the back film are mutually fixed. Since it is possible to prevent the pouch from separating, the overall shape of the gusseted pouch containing the contents can be maintained and so-called bulge can be suppressed.
According to the invention according to claim 6 , the gusset film is folded in two and placed between the front side film and the back side film with the folded part facing the content storage section side, At least one of the longitudinal ends of the gusset film is arranged so that the corner of the gusset film located on the content storage side approaches the outside of the pouch body. It is bent diagonally to the direction. This allows the spout to be placed closer to the edge by bending the gusset film diagonally and placing the spout in the empty space. By positioning the pouch at a lower position, it is possible to prevent a large amount of the contents from remaining inside the gusseted pouch.
According to the invention according to claim 7 , the inner supporting member made of a resin film is arranged in a folded state between the front side film and the back side film constituting the pouch body, and the front side film, the back side film, and the inner side supporting member are arranged in a folded state. A process of heat welding a partial area between the opposing surfaces of the front film and the inner supporting member by sandwiching them with a heat welding jig, and a process of thermally welding a partial area between the opposing surfaces of the back film and the inner supporting member. In the step, a baffle plate is disposed between the inner surfaces of the inner support member folded in half. This makes it possible to heat weld the inner support member to the front side film and the back side film at the same time while avoiding heat welding between the inner surfaces of the inner support member folded in half. The burden can be reduced.
According to the invention according to claim 8 , the manufacturing burden is reduced by thermally welding the inner supporting member to the front side film and the back side film at the same time as forming the seal portion for forming the pouch body into a bag shape. This can be further reduced.

FIG. 1 is a perspective view showing a gusseted pouch according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view showing a gusseted pouch. An explanatory diagram showing each film constituting the gusseted pouch. FIG. 3 is an explanatory diagram showing an example of a film welding method. The perspective view which shows the modification of a spout attachment position. Explanatory drawing which shows each film in the example shown in FIG. Explanatory drawings showing various modifications of the inner support member. Explanatory drawings showing various modifications of the manner in which the inner support member is attached. Explanatory drawing which shows an example of the attachment aspect of the film for gusset parts. Explanatory drawing which shows the modification of the attachment aspect of the film for gusset parts. Explanatory diagram showing a modification example in which the gusset film is attached in a different manner. A reference diagram showing a gusseted pouch that has bulged.

Below, a gusseted pouch 10 that is one embodiment of the present invention will be described based on the drawings.

The gusseted pouch 10 accommodates fluid contents such as drinking water, and as shown in FIG. , has a spout 60 attached to the pouch body 20, and an inner support member 70 disposed within the pouch body 20. The gusseted pouch 10 is housed in an outer case (not shown) during use, display, and transportation.

The pouch main body 20 is formed into a bag shape by forming a seal portion 23 by heat welding a front side film 30, a back side film 40, and a pair of gusset portion films 50 around the contents storage portion 21, and is formed into a bag shape by forming a seal portion 23 by heat welding a front side film 30, a back side film 40, and a pair of gusset portion films 50 around the content storage portion 21. As shown in FIG. 1, the pouch is configured as a so-called horizontal gusset type pouch with gussets 22 formed on both sides.

Each of the films 30, 40, and 50 is formed as a rectangular (or nearly rectangular) resin film having a heat-welding layer on at least one side thereof, and the heat-welding layers are arranged to face each other at the locations where they are heat-welded to each other. It is located in

The thermal welding areas of each film 30, 40, and 50 are as follows. In addition, in FIG. 3, each heat welding area is represented by a dot pattern.
First, as shown in FIG. 3, the front side film 30 includes a first heat welding area 31 that is heat welded to the back side film 40, a second heat welding area 32 that is heat welded to the gusset film 50, and a spout 60. It has a third heat weld area 33 that is heat welded to the inner support member 70 and a fourth heat weld area 34 that is heat welded to the inner support member 70 .
Further, as shown in FIG. 3, the back side film 40 includes a first heat welding area 41 that is heat welded to the front side film 30, a second heat welding area 42 that is heat welded to the gusset film 50, and a spout 60. It has a third heat weld area 43 that is heat welded to the inner supporting member 70 and a fourth heat weld area 44 that is heat welded to the inner support member 70 .
Further, as shown in FIG. 3, the gusset film 50 has a first heat welding area 51 that is heat welded to the front side film 30 and a second heat welding area 52 that is heat welded to the back side film 40. ing.

The spout 60 is made of synthetic resin or the like, and is attached to the pouch body 20 to function as a spout for the contents.
In this embodiment, as shown in FIG. 1, the spout 60 is disposed between the front film 30 and the back film 40 in the seal portion 23 on the top side of the gusseted pouch 10, and is thermally welded to the front film 30 ( It is fixed to the third heat welding area 33) and the back side film 40 (the third heat welding area 43).
As shown in FIG. 1, the spout 60 is mounted at a position closer to one side (left side in FIG. 1) than the center of the seal portion 23 on the top side of the gusseted pouch 10.

In this embodiment, when the gusseted pouch 10 is used (when pouring out the contents), the top of the gusseted pouch 10 with the spout 60 attached is turned laterally, and the gusseted pouch 10 with the gusseted part 22 formed thereon is The gusseted pouch 10 is used with the side of the pouch 10 facing down. At this time, from the viewpoint of arranging the spout 60 at a lower position to smoothly pour out the contents, place the gusseted pouch 10 with the side of the left gusseted pouch 10 in FIG. 1 facing downward. It is preferable to install it on a mounting surface.

As shown in FIG. 2, the inner support member 70 is disposed within the pouch body 20 (content storage section 21), and in this embodiment, it has a rectangular shape (with a heat-welding layer on at least one side thereof). (or approximately rectangular shape) and is formed as a flexible resin film.

As shown in FIG. 3, the inner support member 70 has a first fixed part 71 fixed to the first fixed part 24 of the pouch main body 20 at one longitudinal end thereof, and also has a first fixed part 71 fixed to the first fixed part 24 of the pouch main body 20, and has a first fixed part 71 fixed to the first fixed part 24 of the pouch main body 20, and also has a first fixed part 71 fixed to the first fixed part 24 of the pouch body 20 at one end side in the longitudinal direction. The pouch main body 20 has a second fixed portion 72 fixed to the second fixed portion 25 of the pouch body 20 facing the first fixed portion 24 on the other end side in the longitudinal direction.

As shown in FIGS. 1 and 3, the first fixing part 71 is formed by attaching the heat-welding layer to the heat-welding layer of the front film 30 and the heat-welding layer of the back film 40 in the seal part 23 on the top side of the gusseted pouch 10. It is arranged between the front side film 30 and the back side film 40 in a state of being folded in two so as to face each other, and is thermally welded to the front side film 30 and the back side film 40. In this embodiment, as shown in FIG. 1, a part of the seal portion 23 on the top side of the gusseted pouch 10 functions as the first adhered portion 24 of the pouch body 20.

As shown in FIGS. 1 and 3, the second fixing part 72 is configured to attach the heat weld layer to the heat weld layer of the front film 30 and the heat weld layer of the back film 40 at the seal part 23 on the bottom side of the gusseted pouch 10. It is arranged between the front side film 30 and the back side film 40 in a state of being folded in two so as to face each other, and is thermally welded to the front side film 30 and the back side film 40. In this embodiment, as shown in FIG. 1, a part of the seal portion 23 on the bottom side of the gusseted pouch 10 functions as the second adhered portion 25 of the pouch body 20.

In addition, in the first fixing part 71 and the second fixing part 72, the inner surfaces of the inner supporting member 70 in the folded state are also thermally welded together. For example, by providing a heat welding layer on both sides of the inner support member 70 or by making the inner support member 70 a single film of a heat weldable material, the inner surfaces of the inner support member 70 can also be heat welded to each other.

In addition, as shown in FIG. 3, the inner support member 70 has a third fixed part 73 fixed to the third fixed part 26 of the pouch main body 20 on one end side in the transverse direction, and also has a content storage part. The pouch main body 20 has a fourth fixed portion 74 fixed to the fourth fixed portion 27 of the pouch body 20 opposite to the third fixed portion 26 with the pouch body 21 in between.

As shown in FIG. 2, the third fixing portion 73 is disposed with its heat welding layer facing the heat welding layer on the inner surface side of the front film 30, and is heat welded to the inner surface of the front film 30. has been done. In this embodiment, a part of the inner surface of the front film 30 functions as the third adhered portion 26 of the pouch body 20.

As shown in FIG. 2, the fourth fixing portion 74 is disposed with its heat welding layer facing the heat welding layer on the inner surface side of the back film 40, and is heat welded to the inner surface of the back film 40. has been done. In this embodiment, a part of the inner surface of the back side film 40 functions as the fourth adhered portion 27 of the pouch body 20.

As described above, in this embodiment, the fixed parts 71, 72, 73, and 74 of the inner support member 70 are fixed to the fixed parts 24, 25, 26, and 27 of the pouch main body 20, so that the pouch main body 20 The overall shape can be maintained, and especially when displaying or transporting, the pouch body 20 is placed with its bottom side (the side opposite to the side where the spout 60 is attached) facing down. Even when placed on a surface, it is possible to suppress body bulge where the front side film 30 and the back side film 40 are separated.

Furthermore, in this embodiment, since the fixed parts 71, 72, 73, and 74 of the inner support member 70 are fixed to the pouch main body 20 by heat welding, the seal for forming the pouch main body 20 into a bag shape is used. When forming at least a portion of the seal portion 23 (that is, when forming at least a portion of the seal portion 23 by thermally welding the front side film 30, the back side film 40, and the gusset film 50), Thermal welding of the inner support member 70 can also be performed at one time.

In this embodiment, when heat welding the inner support member 70 to the pouch body 20, the inner support member 70 is folded in half between the front film 30 and the back film 40, as shown in FIG. By sandwiching the front film 30, the back film 40, and the inner supporting member 70 between the pair of heat welding jigs 90, a partial area between the facing surfaces of the front film 30 and the inner supporting member 70 (specifically, , the fourth heat welding area 34, the first fixing part 71, the second fixing part 72, and the third fixing part 73 shown in FIG. (Specifically, the fourth heat-welded region 34, the first fixed portion 71, the second fixed portion 72, and the fourth fixed portion 74 shown in FIG. 3) are thermally welded. Here, if both sides of the inner supporting member 70 are heat-weldable layers and it is not desirable to heat-weld the folded inner surface, in this step, the inner supporting member 70 folded in half In order to avoid thermal welding of the inner surfaces (opposing surfaces) of the inner supporting member 70, it is preferable to arrange the baffle plate 80 between the inner surfaces (opposing surfaces) of the inner supporting member 70 folded in half. When both sides of the inner support member 70 have heat welding properties, materials with different welding temperatures are used for each side, and by controlling the welding temperature, the inner sides folded in half can be heat welded, or vice versa. Although it is possible to prevent heat welding from occurring, by using the baffle plate 80, it is possible to easily prevent the inner surfaces (opposing surfaces) of the inner support member 70 from being heat welded together.
Note that even if both sides of the inner support member 70 are not heat-weldable layers, the baffle plate 80 can be used during heat-welding.
Further, the step of thermally welding the inner support member 70 to the front film 30 and the back film 40 described above is the step of forming the seal portion 23 for forming the pouch body 20 into a bag shape (i.e., the step of forming the seal portion 23 on the front film 30 and the back film 40). This step may be performed simultaneously with the step of thermally welding the back side film 40 and the gusset film 50, or may be performed separately.

Further, as shown in FIG. 3, the inner support member 70 has a plurality of hole-shaped flow portions 75 that are formed to penetrate in the front and back directions to allow the contents to flow. As in this embodiment, the entire outer edge of the inner support member 70 is fixed to the inner wall of the content storage section 21, and the inside of the content storage section 21 is divided into a plurality of (two) spaces by the inner support member 70. Even in this case, the contents can be made to flow through the distribution section 75 within the contents storage section 21.

In addition, as shown in FIG. 2, the inner support member 70 has an inner non-welded region (a portion inside the fixed portions 71 to 74 where the circulation portion 75 is formed) parallel to the gusset film 50. It is located.

Further, as shown in FIGS. 1 and 3, a handle hole 28 is formed in the seal portion 23 on the top side of the gusseted pouch 10, through which the user can hold the gusseted pouch 10 by inserting his/her hand or fingers. At least a portion (in this embodiment, all) of the handle hole 28 is formed so as to pass through a portion where the front side film 30, the back side film 40, and the first fixing portion 71 overlap.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention as set forth in the claims. It is possible. Further, the gusseted pouch 10 may be configured by arbitrarily combining each configuration of the embodiment described above or the modified example described below.

For example, in the above-described embodiment, the gusseted pouch 10 is described as being housed and operated in an outer case (not shown) during use, display, or transportation. The gusseted pouch 10 itself may be used or displayed or transported without being housed inside.

Further, regarding the specific embodiment of each of the films 30 to 50 constituting the pouch body 20, it may be a film having a heat-fusible layer on at least one side, such as an olefin-based material such as low-density polyethylene or polypropylene, or a polyester-based material such as PET. For example, any layer may be laminated on a single heat-welding layer or on a heat-welding layer. The laminated material may be any material, and may be arbitrarily formed by laminating known polyester, polypropylene, polyamide, polyethylene, polybutylene terephthalate, aluminum foil, etc.
Furthermore, in the embodiment described above, the pouch main body 20 was described as being formed from four resin films: the front side film 30, the back side film 40, and a pair of gusset films 50. The specific aspects of the pouch body 20, such as the number of resin films, are not limited to the above, and for example, one resin film (i.e., the front side film 30, the back side film 40, and the gusset film 50 are integrated into one body). Any type of material may be used, such as one formed by winding a formed resin film into a cylindrical shape and thermally welding it at a predetermined location.
Further, in the above-described embodiment, the pouch body 20 was described as being formed as a so-called horizontal gusset type pouch with gusset portions 22 formed on both sides thereof. Any type of pouch may be used as long as it has one gusset 22, such as a so-called bottom gusset type pouch with one gusset 22, a pouch with a total of three gussets 22 on both sides and the bottom, etc. , it can be anything.

Further, in the embodiment described above, the spout 60 was described as being attached to the seal portion 23 on the top side of the gusseted pouch 10, but the specific arrangement of the spout 60 is not limited to the above, and for example, as shown in FIG. 5 and 6, the spout 60 may be attached to the gusset 22 (the gusset film 50) by means such as thermal welding. In the example shown in FIGS. 5 and 6, a third heat welding region 53 that is heat welded to the spout 60 is formed on one of the gusset films 50. In FIG. 6, the heat welding areas where each of the films 30 to 50 are heat welded are represented by a dot pattern. Similarly, the spout 60 may be attached to the front film 30 or the back film 40. Moreover, the gusseted pouch 10 may be configured such that the spout is formed by cutting a part of the pouch body 20 without providing the spout 60 itself.

Further, in the above-described embodiment, the inner support member 70 was described as being configured as a resin film, but the specific aspect of the inner support member 70 is as shown in FIGS. 3 and 6. Any material may be used as long as it has two fixing portions 72. For example, the inner support member 70 may be formed into a string shape or a band shape. The inner support member 70 is preferably formed from a flexible (elastic) material.
When the inner support member 70 is made of a resin film, the inner support member 70 may be made of a resin film having a structure different from that of the films 30, 40, and 50 that make up the pouch body 20. Also from the viewpoint of reducing manufacturing costs, it is preferable to form the inner support member 70 from a resin film having the same structure as each of the films 30, 40, and 50 constituting the pouch body 20.
Further, the method of fixing the inner support member 70 to the pouch body 20 is not limited to the above-mentioned thermal welding, but any method such as bonding using an adhesive may be used.

Furthermore, in the above-described embodiment, the distribution portion 75 of the inner support member 70 is described as being formed in a hole shape, but the specific aspect of the distribution portion 75 is such that it is possible to circulate the contents. For example, as shown in FIG. 7(a), the circulation portion 75 may be formed in the shape of a notch cut out from the outer edge of the inner support member 70.
Further, in the example shown in FIG. 3, a plurality of circular hole-shaped circulation parts 75 are arranged in two rows, but the specific number of circulation parts 75 when forming the circulation parts 75 in a hole shape is The arrangement and shape may be arbitrary. For example, as shown in FIG. 7(b), a plurality of circular hole-shaped flow portions 75 may be arranged in a staggered manner, or as shown in FIG. 7(c). Alternatively, the flow portion 75 may be formed in the shape of a long hole. It may also be in the form of a mesh (not shown) with fine holes through which the contents can flow.
Note that, for example, as in the examples of FIGS. 8(d) and 8(e) described later, the inside of the content storage portion 21 is not divided into a plurality of spaces by the inner supporting member 70 as in the present embodiment. In other words, when a gap is formed between the inner support member 70 and the inner surface of the content storage portion 21 (each film 30 to 50) to allow the contents to flow, the flow portion 75 is formed. You don't have to.

Moreover, in the embodiment described above, the first adhered part 24 of the pouch main body 20 is a part of the seal part 23 on the top side, and the second adhered part 25 is a part of the seal part 23 on the bottom side. However, the specific positions of the first fixed portion 24 and the second fixed portion 25 may be any positional relationship as long as they face each other with the content storage portion 21 in between. It can be changed as appropriate depending on the desired effect of suppressing the bulge of the pouch body 20. For example, as in a modified example shown in FIGS. 8(d) and 8(e), which will be described later, the first adhered part 24 is a part of the inner surface of the front film 30, and the second adhered part 25 is the rear side. It may be a part of the inner surface of the film 40, and the first fixed part 24 is a part of the inner face of the film 50 for one gusset part, and the second fixed part 25 is a part of the inner surface of the film 50 for the other gusset part. It may be a part of the inner surface of the film 50.

Similarly, in the embodiment described above, the third adhered part 26 of the pouch body 20 is a part of the inner surface of the front film 30, and the fourth adhered part 27 is a part of the inner surface of the back film 40. Although the third fixed portion 26 and the fourth fixed portion 27 are specifically positioned in any position as long as they face each other with the content storage portion 21 in between, the third fixed portion 26 and the fourth fixed portion 27 may be in any position.

Further, the specific number and arrangement of the inner supporting member 70 and the manner of fixing it to each film 30, 40, and 50 may be arbitrary as long as it has the first fixing part 71 and the second fixing part 72.
For example, in the example shown in FIG. 8A, compared to the example shown in FIG. The fixing strength of the inner support member 70 can be improved. Note that the aspects of the pouch main body 20 and the inner support member 70 in the example shown in FIG. 8(a) are the same as those in the example shown in FIG. 6, except for the above-mentioned portion A.
Further, in the example shown in FIG. 8(b), two inner supporting members 70 are arranged side by side in the horizontal direction, and each inner supporting member 70 is fixed to each film 30, 40. Note that the aspects of the pouch main body 20 and the inner support member 70 in the example shown in FIG. 8(b) are the same as in the example shown in FIG. 8(a) except for the number of inner support members 70.
In the example shown in FIG. 8(c), the inner support member 70 includes a first film portion (not shown) formed in the same manner as the inner support member 70 in the example shown in FIG. 8(a), and a first film portion (not shown). (not shown) and a second film part (not shown) formed (integral or separate) so as to intersect with the second film part (not shown) in a cross shape. The second film portion (not shown) is fixed to the inner surface of the front film 30, the inner surface of the back film 40, and the inner surfaces of the pair of left and right gusset films 50, and has a circulation portion 75 formed therein. Note that the pouch body 20 and the inner support member 70 in the example shown in FIG. 8(c) have the same configuration as that shown in FIG. This is similar to the example shown in a).
In addition, in the example shown in FIGS. 8(d) and 8(e), one or more inner supporting members 70 are fixed to the inner surface of the front film 30 and the inner surface of the back film 40, respectively. (not shown). Note that the aspects of the pouch main body 20 and the inner support member 70 in the examples shown in FIGS. 8(d) and (e) are the same as the example shown in FIG. 8(a), except for the aspects of the inner support member 70 and the like. For example, this can be achieved by providing a heat-welding layer on one side of the inner supporting member 70 and fixing the heat-welding layer to the inner surface of the front film 30 and the inner surface of the back film 40, respectively.
Although not shown, in the examples shown in FIGS. 1 to 4 and the examples shown in FIGS. The inner support member 70 may be fixed to the pouch main body 20 using only the first fixing part 71 and the second fixing part 72.

In addition, in the example shown in FIGS. 1 to 3, as shown in FIG. 9, the gusset film 50 is folded in half, and the folded part is placed between the front film 30 and the back film 40 to hold the contents. It is disposed facing toward the housing section 21 and is thermally welded to the front side film 30 and the back side film 40.
However, as in the modification shown in FIGS. 10 and 11, at least one of the longitudinal ends of the gusset film 50 (in this modification, the end on the top side where the spout 60 is attached), The gusset film 50 is placed in the longitudinal direction (at an angle of 45° in this modification) so that the corner of the gusset film 50 located on the content storage section 21 side approaches the outside of the pouch body 20. ) It may be folded diagonally, or it may be folded back so that the corner part enters the fold line of the gusset film 50 when it is folded in two. As a result, as shown in FIGS. 10 and 11, by bending the gusset film 50 diagonally and placing the spout 60 in the space left open, the spout 60 can be placed closer to the edge. Therefore, when using the gusseted pouch 10, if the gusseted pouch 10 is placed on the mounting surface with the top of the gusseted pouch 10 with the spout 60 attached facing sideways, the spout 60 By positioning it at a lower position, it is possible to prevent a large amount of contents from remaining inside the gusseted pouch 10.
In addition, the code|symbol 54 of FIG. 10 and FIG. 11 has shown the 4th heat welding area|region 54 which heat-welds the parts of the film 50 for gusset parts which were bent and faced each other.
Further, in the example shown in FIGS. 10 and 11, the gusset film 50 has two notch-like penetration parts 55 on its short sides, and these two penetration parts 55 are for the gusset part. The films 50 are formed so as to overlap each other in a folded state. When such a penetration part 55 is formed, as can be seen from FIGS. 10(b) and 11(b), one of the front film 30 and the back film 40 (in the example of FIGS. The front film 30) and a portion of the gusset film 50 indicated by reference numeral 56 can be thermally welded. Although not shown, the penetrating portion 55 may be formed in a hole shape instead of a notch shape, and in this case, the penetrating portion 55 is formed near the short side of the gusset film 50. Further, the number of penetration parts 55 is not limited to two, and may be any number such as four or six, for example.
Further, as in the example shown in FIG. 11, the gusset films 50 may be thermally welded to each other in a triangular portion 57 formed by further diagonally bending the gusset film 50 that has been folded in half. In this case, the contents can be prevented from entering between the folded gusset films 50 after the gusseted pouch 10 is made. In the example shown in FIG. 11, before the gusset film 50 is thermally welded to the front film 30 and the back film 40, the gusset films 50 are thermally welded to each other in the portion 57.
Note that the heat welding locations between the front side film 30, the back side film 40, and the gusset film 50 are not limited to the examples shown in FIG. 10 and the examples shown in FIG. 11, and may be arbitrarily set according to the embodiment. Bye.

In this specification, terms such as "top," "bottom," and "side" are used to indicate the top and bottom, but these terms are used to describe the gusseted pouch 10 during use, display, transportation, etc. The direction of installation is not limited; for example, the gusseted pouch 10 may be placed on a mounting surface with the sides and top of the gusseted pouch 10 facing downward during use, display, transportation, etc. Good too.

10... Pouch with gusset 20... Pouch main body 21... Content storage section 22... Gusset section 23... Seal section 24... First adhered part 25... Second adhered part Part 26...Third adhered part 27...Fourth adhered part 28...Handle hole 30...Front side film 31...First heat welding area 32...Second heat welding area 33 ... Third heat welding area 34... Fourth heat welding area 40... Back side film 41... First heat welding area 42... Second heat welding area 43... Third heat welding area 44... Fourth heat welding area 50... Gusset film 51... First heat welding area 52... Second heat welding area 53... Third heat welding area 54... Fourth Thermal welding area 55... Penetrating part 60... Spout 70... Inner support member 71... First fixed part 72... Second fixed part 73... Third fixed part 74... Third 4 Fixed part 75 ... Flow part 80 ... Baffle plate 90 ... Heat welding jig

Claims (8)

A gusseted pouch having a gusset portion,
comprising a pouch body and an inner support member disposed within the pouch body,
The pouch main body has a content storage part, and a first fixed part and a second fixed part facing each other with the content storage part in between,
The inner support member has a first fixed part fixed to the first fixed part, and a second fixed part fixed to the second fixed part,
The inner support member is made of a resin film having a heat-welding layer,
The first fixed part is fixed to the first fixed part by heat welding,
The second fixed part is fixed to the second fixed part by heat welding,
The pouch body has a front side film, a back side film, and a sealing part for forming the pouch body into a bag shape,
The first fixing part is disposed between the front side film and the back side film in the sealing part, and is thermally welded to the front side film and the back side film,
A handle hole is formed in the seal portion,
A gusseted pouch, wherein at least a portion of the handle hole is formed to penetrate through a portion where the front side film, the back side film, and the first fixing portion overlap. 2. The gusseted pouch according to claim 1, wherein the inner support member has a hole-like or notch-like circulation portion for distributing the contents. The pouch main body has a third adhered part and a fourth adhered part facing each other with the content storage part in between,
The inner support member has a third fixed part fixed to the third fixed part and a fourth fixed part fixed to the fourth fixed part. The gusseted pouch described in 2 . The inner support member is made of a resin film having a heat-welding layer,
The pouch body has a front side film, a back side film, and a sealing part for forming the pouch body into a bag shape,
The first fixing part and the second fixing part are folded in half in the sealing part so that the thermal welding layer faces the front film and the back film, and disposed between the films and thermally welded to the front side film and the back side film,
The third fixed part is thermally welded to the inner surface of the front film,
The gusseted pouch according to claim 3 , wherein the fourth fixing part is thermally welded to the inner surface of the back film. The pouch body has a front side film, a back side film, and a sealing part for forming the pouch body into a bag shape,
The first fixed part is fixed to the inner surface of the front film,
The gusseted pouch according to any one of claims 1 to 4, wherein the second fixing part is fixed to an inner surface of the back side film. A gusseted pouch having a gusset portion,
comprising a pouch body and an inner support member disposed within the pouch body,
The pouch main body has a content storage part, and a first fixed part and a second fixed part facing each other with the content storage part in between,
The inner support member has a first fixed part fixed to the first fixed part, and a second fixed part fixed to the second fixed part,
The pouch body has a front side film, a back side film, and a gusset film,
The gusset film is folded in two and placed between the front side film and the back side film with the folded part facing the content storage section side,
At least one of both ends of the gusset film in the longitudinal direction, the gusset film is arranged such that a corner of the gusset film located on the content storage section side approaches the outside of the pouch main body. A gusseted pouch characterized in that the film is bent diagonally with respect to its longitudinal direction. A method for manufacturing a gusseted pouch according to any one of claims 1 to 6, comprising :
The inner support member made of a resin film is placed in a folded state between the front film and the back film that constitute the pouch body, and the front film, the back film, and the inner support member are bonded together using a heat welding jig. The method includes the step of thermally welding a partial area between opposing surfaces of the front side film and the inner supporting member by sandwiching the film, and thermally welding a partial area between the opposing surfaces of the back side film and the inner supporting member,
A method for manufacturing a gusseted pouch, characterized in that, in the step, a baffle plate is arranged between the inner surfaces of the inner support member folded in half. 8. The method for manufacturing a gusseted pouch according to claim 7, wherein the step is performed at the same time as forming a seal portion for forming the pouch body into a bag shape.

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