JP7651159B2 - Pouch container, its manufacturing method, and bag body used therein - Google Patents

Description

The present invention relates to a pouch container having a bag body to which a dispensing device made of synthetic resin is attached , a manufacturing method thereof , and a bag body (intermediate body) constituting the pouch container.

In recent years, pouch containers, which are made of a bag made of a laminated film with high gas barrier properties and a dispensing device attached thereto, have been widely used as packages for fluid products such as liquid drinks, shampoos, jelly drinks, etc. In these pouch containers, the dispensing device generally consists of a main body welded to the bag and a cap that closes the main body, and a screw cap is generally used as the cap.

The bags that make up pouch containers come in two types: one with front and back films and a bottom film whose edges are welded together, and a gusset type with left and right side films folded into a V shape between the front and back films. The former is called a standing pouch because when the contents are filled, the bottom film expands and the pouch stands on its own.

In a standing pouch, the edges of the front and back films are welded together, so when filled with contents, the pouch narrows toward the top when viewed from the side. On the other hand, a gusset type pouch maintains its rectangular shape over its entire height when filled with contents.

In either case, the bag is manufactured in a flat folded state, and when attaching the dispensing device, the bag is inflated and the lower part of the dispensing device is inserted into the top of it. The upper parts of the front and rear films and the lower part of the dispensing device are sandwiched between a high-frequency horn, ultrasonic horn or hot platen, and the three are welded (joined) together.

Therefore, the upper part of the bag needs to be large enough that the lower part of the dispensing device can be easily inserted into it when inflated, but this creates a problem in that it cannot meet the needs of users who want a slimmer bag.

In this regard, Patent Document 1 discloses that in a gusset-type pouch container, the lower part of the dispensing device is inserted between one of the front and rear films and the side film, thereby making it easier to attach the dispensing device while reducing the width of the bag body.

JP 2018-39569 A

In Patent Document 1, it is said that a gusset-type pouch container can be slimmed down and easily fitted with a pouring device, but because it is difficult to provide a bottom film for a gusset type, a pouch container that is slim yet can stand on its own has not been realized. Therefore, there has been a demand for technology that can realize a slim form while facilitating the attachment of a pouring device for a pouch container in which the front and rear films are welded together.

The present invention is intended to meet such demands.

The present invention includes various configurations, and typical configurations are specified in each claim. The invention of claim 1 relates to a pouch container, which comprises:
"It consists of a bag body and a dispensing device attached to the top of the bag,
The bag body has front and rear films whose edges are welded together in an overlapping state , while the dispensing device has a synthetic resin body whose lower part is a fixed part that fits into the upper part of the bag body;
The fixed part of the main body of the dispensing device is sandwiched between the upper parts of the front and rear films, and the three are welded together.
In this basic configuration,
"The bag body has an outward protruding portion that protrudes to the left and right at the upper portion where the fixing portion of the dispensing device fits, and the main body portion, which is the portion below the outward protruding portion, is formed narrower than the upper portion over the entire height with the same left and right width, so that the bag body has a T-shaped shape when viewed from the front,
The main body of the bag is of a size such that it is difficult or impossible to insert the fixing part of the dispensing device therein,
The left and right ends of the outward protruding portion are welded in advance, and the upper portion of the bag body has a left and right width that allows the fixing portion of the outward protruding portion to be easily inserted with the left and right ends of the outward protruding portion welded in advance, and the upper portion of the bag body on both left and right sides of the fixing portion of the spouting device includes a portion joined by welding the fixing portion and left and right ends that are joined before the fixing portion is welded .
It has the following characteristics:

In this invention, the terms front-to-back, up-down, and left-to-right are used to specify directions, but the front-to-back direction is the direction in which the films are stacked, and up-down refers to the side where the dispensing device is attached as the top and the opposite side as the bottom. Left-to-right refers to the left-to-right direction as seen from the direction in which the films are stacked.

The invention of claim 2 is a preferred embodiment of claim 1,
"The bag has a bottom film sandwiched and fixed to the lower part of the front and rear films, and is capable of standing on its own when filled with contents."
The structure is as follows.

The invention of claim 3 relates to a method for manufacturing a pouch container,
" A bag formed with front and rear films in an upwardly opening state and a dispensing device main body with a fixed part at the bottom that is inserted into the bag are prepared, the bag is inflated from a flat state and the fixed part of the dispensing device main body is inserted into the top, and then the three parts, the top of the front and rear films that make up the bag and the fixed part of the dispensing device main body, are welded together. "
In this basic configuration,
" The bag body has an outward protruding portion that protrudes to the left and right at the upper portion where the fixing portion of the dispensing device main body fits in, and the main body portion, which is the portion below the outward protruding portion, is formed narrower than the upper portion over the entire height with the same left and right width, so that the bag body has a T-shaped shape when viewed from the front,
The main body of the bag body is of a size such that it is difficult or impossible to insert the fixing part of the dispensing device main body therein,
the left and right ends of the outward protruding portion are welded in advance, and the upper portion of the bag body has a left and right width that allows the fixing portion of the outward protruding portion to be easily inserted with the left and right ends of the outward protruding portion welded in advance,
After preparing the bag body with the left and right ends of the outward protruding portion welded in advance, the fixing portion of the dispensing device main body is inserted into the upper portion of the bag body, and then the upper portion of the bag body and the fixing portion are welded together, and at the same time, the upper portion of the bag body is joined except for the ends of the outward protruding portions.
It has the following characteristics:

The invention of claim 4 relates to a bag constituting a pouch container. That is, the bag of the pouch container is formed with an upward opening by front and rear films, and a fixing part of a synthetic resin body of a dispensing device is welded to the upper part,
"The upper part of the dispenser into which the fixing part is inserted is formed with outwardly projecting parts that protrude to the left and right, and the main body part, which is the part below the outwardly projecting parts, is formed narrower than the upper part over the entire height with the same left and right width, so that it has a T-shaped shape when viewed from the front,
The main body portion is of a size such that it is difficult or impossible to insert the fixing portion of the dispensing device therein,
The left and right ends of the outward protruding portion are welded in advance, and the upper portion has a left and right width that allows the fixing portion of the pouring device to be easily inserted with the left and right ends of the outward protruding portion welded in advance .
The structure is as follows.

In the invention of claim 5, the spouting device body is welded to the bag body with the outward protruding portion by the method of claim 3, and then the outward protruding portion is cut off. In this case, the bag body has a slim shape with the same width over its entire height, which improves the aesthetic appearance and saves labor in packaging, etc.

In the present invention, by providing an outward protruding portion only on the upper part of the bag, the bag can be made slimmer and a dispensing device can be easily attached, even though the pouch container has a simple type of bag in which the front and rear films are directly welded together. This allows for a wide variety of pouch containers and a wider range of choices for users.

The bag body may have no bottom film, in which case it can be used in the same way as a tube container, but if it is applied to a standing pouch with a bottom film as in claim 2, it can be used in the same state as a bottle, which significantly improves the product value. In other words, it can be used to package a variety of contents as a replacement for slim bottles.

1A and 1B are partial views showing a first embodiment of the present invention, in which (A) is an overall separated front view, and (B) and (C) are partial views showing a procedure for attaching the spout device. 1A is a cross-sectional view taken along line IIA-IIA in FIG. 1C, FIG. 1B is a front view after filling, FIG. 1C is a partially cutaway front view of the first embodiment, and FIG. 13A is a front view of a second embodiment, and FIG. 13B is a front view of a third embodiment.

(1) Structure of the First Embodiment First, the first embodiment shown in Figures 1, 2(A) and (B) will be described. The pouch container is composed of a bag body 1 made of a laminated film and a spouting device 2 attached to the upper end of the bag body 1.

The bag body 1 is formed in a roughly rectangular shape with the top and bottom long when viewed from the front, and the dispensing device 2 is attached to the middle part of the left and right upper part of the bag body 1. The bag body 1 is made up of three films: front and back films 3 and 4 and a bottom film 5, and when the contents are filled, the bottom film 5 spreads out horizontally. Therefore, the pouch container of this embodiment is a standing pouch that can stand on its own on a flat surface such as a table.

The bottom film 5 is folded in half with the crease facing up and sandwiched between the lower parts of the front and rear films 3 and 4. The left and right sides of the bottom film 5 and the left and right sides of the front and rear films 3 and 4 are welded together, and the bag body 1 is welded to the front and rear films 3 and 4 between the left and right sides.

In the figure, the welded areas between the front and rear films 3, 4 are shown with parallel diagonal lines slanting upwards to the right, and the welded areas between the bottom film 5 and the front and rear films 3, 4 are shown with parallel diagonal lines slanting downwards to the left. The areas where the parallel diagonal lines cross and form a cross-hatched pattern are areas where the front and rear films 3, 4 and the bottom film 5 are welded together. The areas shown with dots as in Figure (C) are the welded locations when the front film 3 is peeled off.

The dispensing device 2 is composed of a cylindrical main body (dispensing device main body) 6 and a cap (screw cap) 7 attached to it. The main body 6 has a fixing part 8 (the lower part of the dispensing device 2) to which the bag body 1 is welded, and a cylindrical part 9 located above the fixing part 8 and exposed. An upper flange 10 is provided at the lower end of the cylindrical part 9, while a lower flange 11 is provided at the upper end of the fixing part 8. The area between the upper and lower flanges 10, 11 forms a guide tube part 12 which is rectangular in plan view.

As shown in FIG. 2(A), the fixing part 8 is eye-shaped when viewed from the bottom, and the upper and lower flanges 10, 11 are each octagonal and slightly longer in plan view. The upper and lower flanges 10, 11 are used in the filling and transporting processes, and the pouch container can be held non-rotatably and slidably by fitting the groove between the upper and lower flanges 10, 11 into a pair of plate-like chutes (ribs) arranged in parallel. The cylindrical part 9 of the main body 6 is formed with a male screw 13 into which the cap 7 is screwed.

As shown in FIG. 1(B), a pilfer-proof ring 15 is connected to the lower end of the cap 7 via multiple bridges 14. On the other hand, the cylindrical portion 9 of the main body 6 of the dispensing device 2 is formed with an annular rib 16 that holds the pilfer-proof ring 15 so that it cannot move upward when the cap is fully screwed in, and a protrusion 17 that holds the pilfer-proof ring 15 so that it cannot rotate back. The cap 7 does not have to be equipped with a pilfer-proof ring 15.

The inside of the bag body 1 is about the same size as the fixing part 8 of the dispensing device 2. In FIG. 1, the left-right width of the inside of the bag body 1, excluding the upper part of the main body, is slightly larger than the left-right width of the fixing part 8 of the dispensing device 2, and although the bag body 1 is shown in a flattened state, when the bag body 1 is inflated, the inside of the main body, excluding the upper part, becomes about the same size as the fixing part 8 of the dispensing device 2.

An outward protruding portion 18 is formed on the upper portion of the bag body 1, protruding on both the left and right sides. The outward protruding portion 18 has a depth that allows the fixing portion 8 of the dispensing device 2 to fit loosely, and has an outward protruding dimension that allows the fixing portion 8 of the dispensing device 2 to be inserted with a certain amount of room when the upper portion of the bag body 1 is inflated, as shown in Fig. 2(A). In this embodiment, the left and right ends of the outward protruding portion 18 are also welded in a state before the dispensing device 2 is attached.

As shown in FIG. 2(A), the installation of the dispensing device 2 is performed by inflating the bag body 1, inserting the fixing part 8 of the dispensing device 2 into the upper part of the bag body 1, and then clamping the upper parts of the front and rear films 3, 4 with a pair of horns or hot plates. By clamping with a pair of horns or hot plates, the front and rear films 3, 4 are joined to the fixing part 8 of the dispensing device 2, and the front and rear films 3, 4 are joined together at both the left and right sides of the fixing part 8 of the dispensing device 2.

To be more specific, the installation process of the dispensing device 2, the bag body 1 is intermittently transported in a flattened state down a chute toward the jig, and after it is set in the jig in a flattened position and in a vertically long position, it is inflated by the pressing action of pushers on both the left and right sides, the fixing part 8 of the dispensing device 2 is then inserted into the top, and the bag body 1 and the dispensing device 2 are joined by clamping them with a pair of front and rear horns or heating plates.

Now, if the bag body 1 is straight and does not have an outward protruding portion 18, and if the bag body 1 is slim, when the bag body 1 is inflated and then the fixing portion 8 of the dispensing device 2 is inserted, the fixing portion 8 hits the opening edge of the bag body 1 and becomes impossible to insert, and as a result, the bag body 1 and the dispensing device 2 cannot be joined together.

In contrast, in this embodiment, by providing the outward protruding portion 18, the fixing portion 8 of the dispensing device 2 is inserted into the upper portion of the bag body 1 with plenty of room, so even if the main body portion of the bag body 1 in which the contents are filled is about the same size (cross-sectional area) as the fixing portion 8 of the dispensing device 2 or is smaller than the fixing portion 8 of the dispensing device 2, the dispensing device 2 can be attached without any trouble. Therefore, a standing pouch with a slim shape can be easily provided.

(2) Other embodiments In the first embodiment, the spouting device 2 is disposed approximately concentrically with the bag body 1, and therefore, the outward protrusions 18 are provided on the left and right sides. However, in the first reference example shown in FIG. 2 (C) , the spouting device 2 is disposed eccentrically on one side in the left-right direction of the bag body 1, and therefore, the outward protrusions 18 are provided protruding only on one side in the left-right direction.

In this case, as shown by the dotted line, the outward protrusion 18 may be folded back along a line passing through its base at a crease 19 and fixed to the main body of the bag body 1 with adhesive or the like. By folding the outward protrusion 18 back in this way, the bag body 1 becomes straight, which is aesthetically pleasing and also makes it easier to handle when boxing, etc. Double-sided adhesive tape or welding can also be used as a fixing means.

Even if the outward protrusions 18 are provided on both the left and right sides, it is possible to fold the outward protrusions 18 forward or backward and fix them. Also, when the outward protrusions 18 are provided on both the left and right sides, it is possible to make the protruding dimensions of the left and right outward protrusions 18 different.

In the second reference example shown in Fig. 2 (D), the bag body 1 is in an intermediate stage before the dispensing device 2 is attached, and the outward protruding portion 18 is not joined. In this state, when the main body of the bag body 1 is pressed from the left and right, the upper part also expands as a whole, so there is no problem in inserting the fixing part 8 of the dispensing device 2. In this embodiment, the protruding dimension of the outward protruding portion 18 is made as small as possible, and the dispensing device 2 can be easily joined.

In this embodiment , the fixing part 8 of the dispensing device 2 can be easily inserted without providing the outward protruding part 18. Therefore, this can be an independent invention. There are no pouch containers on the market that have a neck like a bottle, but by applying this embodiment, the dispensing device 2 can be easily attached to a pouch container that has a thin neck, and after the dispensing device 2 is attached, the outward protruding part 18 can be cut off to realize a thin neck.

As shown by the dashed line in Figure 2 (D), it is also possible to join the outward protruding parts 13 of the front and rear films 3, 4 by welding, while tilting the inner surface 20 of the joint so that it spreads outward and faces upward. By forming it in this way, the fixing part 7 of the pouring device 2 can be guided in, so the protruding dimension of the outward protruding part 18 can be made as small as possible.

In the second embodiment shown in Fig. 3(A), the main body of the bag body 1 is set to a size smaller than the fixing part 8 of the dispensing device 2. The fact that the present invention can be applied to such a very thin pouch container is a major advantage of the present invention.

In the third embodiment shown in Fig. 3(B), the outward protruding portion 18 is cut off after the spouting device 2 is attached. The cutting off can be performed simultaneously with the attachment, or can be performed as a separate process after the attachment process. In this embodiment, the outward protruding portion 18 does not exist in the finished product, which is excellent in terms of aesthetics and handling.

Although the embodiment of the present invention has been described above, the present invention can be embodied in various other ways. For example, the present invention can be applied to a tube-type pouch container that does not have a bottom film 5. In addition, the dispensing device 2 does not necessarily have to be a screw cap type, and a hinge cap type or a pull-and-sear type can also be used. As disclosed by the applicant in Japanese Patent Application No. 2019-192538, a method of removing the cap by pinching from a direction perpendicular to the axis can also be used.

This invention can be applied to pouch containers. Therefore, it can be used industrially.

1 Bag body 2 Dispensing device 3, 4 Film 5 Bottom film 6 Dispensing device main body (dispensing device main body)
7. Cap
8 Fixed portion constituting the lower portion of the dispensing device 10, 11 Flange 18 Outward protruding portion

Claims (5)

It consists of a bag body and a dispensing device attached to the upper part of the bag body,
The bag body has front and rear films whose edges are welded together in an overlapping state , while the dispensing device has a synthetic resin body whose lower part is a fixed part that fits into the upper part of the bag body;
A pouch container in which a fixing portion of a main body of the dispensing device is sandwiched between the upper portions of the front and rear films, and the three are welded together,
An outward protruding portion protruding to the left and right is formed at the upper portion of the bag body into which the fixing portion of the spouting device is inserted, and the main body portion, which is a portion below the outward protruding portion, is formed narrower than the upper portion over the entire height with the same left and right width, so that the bag body has a T-shaped shape when viewed from the front,
The main body of the bag is of a size such that it is difficult or impossible to insert the fixing part of the dispensing device therein,
The left and right ends of the outward protrusion are welded in advance, and the upper part of the bag body has a left and right width that allows the fixing part of the outward protrusion to be easily inserted when the left and right ends of the outward protrusion are welded in advance, and the upper part of the bag body on both left and right sides of the fixing part of the spouting device includes a part joined by welding of the fixing part and left and right ends that are joined before the fixing part is welded.
Pouch container. The bag body has a bottom film sandwiched and fixed to the lower part of the front and rear films, and is capable of standing on its own when filled with contents.
2. The pouch container according to claim 1. A bag formed by front and rear films in an upwardly opening state and a dispensing device main body having a fixing part at the lower part to be inserted into the bag are prepared, the bag is inflated from a flat state to insert the fixing part of the dispensing device main body into the upper part, and then the upper part of the front and rear films constituting the bag and the fixing part of the dispensing device main body are welded together,
The bag body has an upper portion into which the fixing portion of the dispensing device main body fits, and the main body portion, which is a portion below the outward protruding portion, is formed narrower than the upper portion over the entire height with the same left and right width, so that the bag body has a T-shaped shape when viewed from the front.
The main body of the bag body is of a size such that it is difficult or impossible to insert the fixing part of the dispensing device main body therein,
the left and right ends of the outward protruding portion are welded in advance, and the upper portion of the bag body has a left and right width that allows the fixing portion of the outward protruding portion to be easily inserted with the left and right ends of the outward protruding portion welded in advance,
The bag body is prepared with the left and right ends of the outward protruding portion welded in advance, and then the fixing portion of the spouting device main body is inserted into the upper portion of the bag body. Next, the upper portion of the bag body is welded to the fixing portion, and at the same time, the upper portion of the bag body is joined to the portion excluding the ends of the outward protruding portion.
A method for manufacturing a pouch container. A pouch container bag formed with an upward opening by front and rear films, and a fixing part of a synthetic resin body of a dispensing device is welded to the upper part,
An outward protruding portion that protrudes to the left and right is formed at the upper portion where the fixing portion of the pouring device is inserted, and the main body portion, which is the portion below the outward protruding portion, is formed narrower than the upper portion over the entire height with the same left and right width, so that it has a T-shaped shape when viewed from the front,
The main body portion is of a size such that it is difficult or impossible to insert the fixing portion of the dispensing device therein,
The left and right ends of the outward protruding portion are welded in advance, and the upper portion has a left and right width that allows the fixing portion of the pouring device to be easily inserted with the left and right ends of the outward protruding portion welded in advance.
The bag body of a pouch container. The method according to claim 3, further comprising the step of joining the bag body to the spouting device body, and then cutting off the outwardly protruding portion of the bag body.
A method for manufacturing a pouch container.

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