JPH1128773A - Manufacture of packaging bag, method and apparatus for manufacture of package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously manufacture a plurality of packaging bags each having a back adhering part with a vapor discharge passage from a lengthy sheet by constituting it by a back adhering part forming step of forming the adhering part along a lengthwise direction on the sheet and a bag making step of forming the bag by forming the sheet in a bag-like state. SOLUTION: The method for manufacturing a packaging bag comprises a back adhering part forming step of forming a back adhering part 7 having a vapor discharge passage by ending a lengthy sheet 1 along a lengthwise direction and adhering inner surfaces 1b of the sheet 1 near a bent edge 30 of the sheet 1, and a bag making step of forming the sheet 1 formed with the part 7 by the adhering part forming step in a bag-like state by bending the sheet 1 along the lengthwise direction and then adhering the inner surfaces 1b of the sheet 1 across a lateral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a packaging bag for storing foods and the like, and a method and an apparatus for manufacturing a package containing foods and the like inside the packaging bag.
The present invention mainly relates to a method and an apparatus for manufacturing a package for a microwave oven capable of heating a cooked item such as a Chinese cooking utensil or a curry in a microwave oven, and a method for manufacturing a packaging bag for the package.

[0002]

2. Description of the Related Art Conventionally, cooked goods packaged in bags are:
When a microwave oven is used, which is limited to the cooking method using hot water heating, there is a possibility that the internal pressure increases due to the moisture content of the article to be cooked during heating and swells and ruptures. Therefore,
In the case of cooking in a microwave oven, it is necessary to devise a way to release steam without leaking liquid.Therefore, conventionally, a check valve is attached to the package, or a part of the package is cut with scissors immediately before cooking. Was.

[0003]

However, when a check valve is used, it has not been widely used because of its incomplete function and cost. In addition, when a part of the package is cut, there is a possibility that the liquid product to be cooked may be boiled and spilled.

Therefore, when heating and cooking in a microwave oven,
The applicant of the present invention has previously filed a package as shown in FIG. 5 as an inexpensive package for a microwave oven that can efficiently discharge steam generated from the product to be cooked and prevent leakage of the product to be cooked. did. (Japanese Patent Application No. 8-161640)

[0005] The package 10 shown in FIG. 5 has a back pasting portion 7 formed by bonding the ends of the packaging sheet to each other. The back pasting portion 7 has a first passage 6 a communicating with the accommodation space 9 and a first passage 6 a. 2 passage 6b
Is formed. In the package 10, the food to be cooked is stored inside the packaging bag 20, and when the food to be cooked is heated by the microwave oven, the steam generated from the food to be cooked passes through the open steam discharge passage 6 to the outside. In a state where the liquid is discharged and the packaging bag 20 is swollen due to the internal vapor pressure, the liquid passes through the first passage 6 a of the upper vapor discharge passage 6.
Since the liquid hardly enters the inside, the liquid can be prevented from leaking out through the vapor discharge passage 6.

[0006] As a method of manufacturing the package 10, the left and right ends of a single packaging sheet are bent toward the center, and the both ends are overlapped to form a back-attached portion at the center to form a bag. A method is conceivable.

However, in the above manufacturing method, only one package is obtained from one package sheet, and the inside is filled while a series of packaging bags are continuously formed from a long sheet. There is a problem that is difficult.

The present invention has been made in view of the above-mentioned conventional problems, and has a manufacturing method capable of continuously manufacturing a series of packaging bags provided with a backing portion having a steam discharge passage.
It is another object of the present invention to provide a manufacturing method and a manufacturing apparatus for completing a plurality of packages by filling an object to be cooked into the inside of the packaging bag.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a method of manufacturing a packaging bag according to the present invention comprises bending a long sheet 1 along a longitudinal direction, and Sheet inner surface 1 near bent edge 30 of long sheet 1
b are adhered to each other to provide a back paste portion 7 having a steam discharge passage.
After the long sheet 1 on which the back pasting portion 7 is formed in the back pasting portion forming step, the long sheet 1 on which the back pasting portion 7 is formed is bent along the longitudinal direction, the sheet inner surfaces 1b are traversed in the transverse direction. And then forming a bag-like shape by bonding.

In the method for manufacturing a packaging bag having the above structure, the long sheet 1 is bent along the longitudinal direction in the back-paste forming step, and then the bent long sheet 1 is bent. The sheet inner surfaces 1b in the vicinity of the edge 30 are bonded in the longitudinal direction to form the back bonding portion 7. Further, after the long sheet 1 is bent in the longitudinal direction by the bag making process, the sheet inner surfaces 1b are connected to each other. A plurality of packaging bags 2 having a back adhering portion 7 provided with a vapor discharge passage from the long sheet 1 by being adhered in a bag shape across the short direction.
0 can be manufactured continuously.

Further, in the method for manufacturing a package according to the present invention, a plurality of packages having a back adhering portion 7 are filled by filling a product or the like into the packaging bag 20 in a filling step. Can be continuously manufactured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a package 10 manufactured in this embodiment will be described with reference to FIG.

The package 10 has a package (not shown) accommodated in a packaging bag 20 having a backing portion 7 formed by heat-sealing the inner surfaces of a packaging sheet. Here, the packaging sheet is formed of a multilayer of the outer film 1a and the inner film 1b, and the inner film 1b has heat-fusibility.

The packaging bag 20 has a substantially rectangular shape in a plan view in which the packaging sheet is folded, and has three sides 8b, 8c of its periphery.
8d is sealed by heat fusion, and an accommodation space 9 is formed inside. Further, at the center of the packaging bag 20, there is formed a back adhering portion 7 in which the inner films 1b of the folded and superposed packaging sheets are heat-sealed with an adhesive portion 8a.

The back adhering portion 7 is formed with a steam discharge passage 6 which communicates with a storage space 9 for accommodating articles to be cooked. The steam discharge passage 6 includes a first passage 6a and a second passage 6b, and the second passage 6b extends from the first passage 6a in the longitudinal direction of the back pasting portion 7, and the second passage 6b Steam can be discharged by cutting out the vicinity of the end.

In the present embodiment, the package 10 is
The width H is 170 mm, and the front-rear width S is 130 mm. Further, the width W of the back pasting portion 7 is 30 mm.

Next, a manufacturing apparatus for manufacturing the package 10 shown in FIG. 4 will be described. The manufacturing apparatus shown in FIG. 1 is configured such that the long sheet 1 fed from the sheet roll 2 is provided with a steam discharge passage 6.
Forming the backing portion 7 having the backing portion 7 and forming the packaging bag 20 by forming the long sheet 1 on which the backing portion 7 is formed by the backing portion forming means into a bag shape. Means, a filling means for filling the inside of the packaging bag 20 with an article to be cooked, and a filling port bonding means for bonding and sealing the filling port 5 of the packaging bag 20 filled by the filling means.

Here, the long sheet 1 is composed of the outer film 1a.
And the inner film 1b are formed from multiple layers.
b has heat fusion property. The long sheet 1 having the total width L set to 400 mm is fed out with the inner film 1b as the upper surface, and is sequentially sent downstream while the left end 1c and the right end 1d are regulated by width regulating rollers and the like.

The outer film 1a is made of a film made of a thermoplastic synthetic resin. Specifically, in this embodiment, a biaxially stretched nylon film having a thickness of 15 μm is used. As the outer film 1a, a heat-resistant film such as biaxially stretched polyethylene terephthalate, biaxially stretched polypropylene, cellophane, etc., can be used, and a gas barrier film such as an ethylene / vinyl alcohol copolymer or various coated films can be used. May be employed.

As the inner film 1b, a 30 μm thick film made of linear low density polyethylene is used. Incidentally, the inner film 1b is made of low-density polyethylene,
A heat-fusible film such as high-density polyethylene, unstretched polypropylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic ester copolymer, or ionomer can be used.

In FIG. 1, the back-paste forming means includes a folding section 11 for bending the long sheet 1 along the longitudinal direction,
Folded edge portion 3 folded and superposed at the folding portion 11
First bonding portion 12 for bonding inner films 1b near zero to each other
Consists of

The folding section 11 comprises a substantially rectangular first plate 11a and a second plate 11b parallel to the first plate 11a and arranged at a predetermined interval above. Here, one edge 21 of the first plate 11a is the same as FIG.
As shown in (a), the long sheet 1 is provided at a position parallel to the conveying direction X (longitudinal direction) and at a fixed distance W1 (285 mm) from the left end 1c of the long sheet 1. In addition, one edge 22 of the second plate 11b facing the one edge 21 of the first plate 11a is separated from the one edge 21 of the first plate 11a by a predetermined distance W2 on the upstream side and on the downstream side. It is provided to be inclined in plan view so as to overlap by a fixed distance W3 (30 mm). In addition, each plate 11a, 11
For example, a plurality of rollers (not shown) that press the long sheet 1 are arranged on the upper and lower surfaces of the long sheet 1 so that wrinkles and the like do not occur.

As described above, the folding section 11 is provided with the long sheet at the downstream side of the intersection 23 between the both edges 21 and 22 by the one edges 21 and 22 of the first and second plates 11a and 11b. Overlapping section 25 that folds 1 into three folds
And a guide portion 24 for guiding the long sheet 1 to the overlapping portion 25 on the upstream side of the intersection 23.
In addition, the long sheet 1 in the folding part 11 is shown in FIG.
As shown in the figure, the left end 1c is conveyed below the first plate 11a and the right end 1d is conveyed above the second plate 11b.

As shown in FIG. 3 (a), the first adhesive portion 12 is made of heat-resistant rubber or the like on the surface of the long sheet 1 which is disposed above the portion folded in three by the folding portion 11. Receiving member 12a, such as a metal plate,
a, and a heating member 12b such as a heat seal bar disposed below the long sheet 1 in opposition thereto. Here, the receiving member 12a and the heating member 12b are provided so as to be movable up and down, and the inner films 1b in the vicinity of the bent edges 30 of the long sheet 1 folded by the folding portion 11 are thermally fused to each other. , The back pasting portion 7 is formed intermittently along the longitudinal direction. The heating member 12b has a back discharge portion 7 on a surface facing the long sheet 1 and a steam discharge passage 6
Is formed, a non-contact concave portion (portion not thermally fused) that does not contact the long sheet 1 is formed. In the present embodiment, the length of the long sheet 1 in the longitudinal direction of the receiving member 12a and the heating member 12b is set to 260 mm, and the width in the short direction is set to 30 mm.

In FIG. 1, the bag-making means comprises a whole bent portion 13 for bending the long sheet 1 on which the back sticking portion 7 is formed by the back sticking portion forming means along a longitudinal direction, and the whole bent portion. The second bonding portion 14 is configured to bond the inner films 1b bent by the first and second transverse films 13 to each other in the transverse direction.

The overall bending portion 13 includes a former 13a formed to bend the long sheet 1, and a pair of rotatable rollers 13b, 13b arranged on both left and right sides. The former 13a is configured to bend both ends 1c, 1d of the long sheet 1 upward with a position at a fixed distance H (170 mm) from the left end 1c of the long sheet 1 as a fulcrum. Also, a pair of rollers 13b, 13b
Is configured such that the filling port 5 is formed by sandwiching and pressing the long sheet 1 from the left and right so that both ends 1c and 1d face each other.

The second adhesive portion 14 includes a pair of seal bars 14a and 14b disposed on both left and right sides of the long sheet 1. The pair of seal bars 14a and 14b heat-seal the inner film 1b of the long sheet 1 having the back-sticking portion 7 across the transverse direction (direction substantially perpendicular to the longitudinal direction) to form the side portion 3. To form the accommodation space 9. In the present embodiment, the second bonding portion 14 includes a pair of seal bars 14a and 14b on the downstream side, and two housing spaces 9 are formed by the two pairs of seal bars 14a and 14b on the upstream and downstream sides. It is constituted as follows.

The filling means comprises a filling machine 17 for filling the storage space 9 of the packaging bag 20 formed in a bag shape by the second bonding portion 14 with the article to be cooked. Filling machine 1
Reference numeral 7 denotes two filling nozzles 17a, which are vertically movable.
17b, so that the two storage spaces 9 can be simultaneously filled with the articles to be cooked through the filling port 5.

The filling port bonding means comprises a filling port bonding section 16 for bonding the filling port 5 of the packaging bag 20 filled with the article to be cooked by the filling machine 17. Filling port adhesive part 1
6 is provided with a pair of flat seal bars 16a and 16b which can be freely contacted and separated on both left and right sides of the filling port 5.

Further, in this embodiment, there is provided a cutter device (not shown) for cutting the side portions 3 of the series of packages 10 in which the articles to be cooked are filled.

Next, a manufacturing method using the manufacturing apparatus having the above configuration will be described. In the present embodiment, the manufacturing method of the package includes a back pasting portion forming step of forming the back pasting portion 7 on the long sheet 1 by the back pasting portion forming means, and forming the long sheet 1 into a bag by the bag making means. A bag-making step of forming the packaging bag 20 by forming into a shape, a filling step of filling the inside of the packaging bag 20 with an article to be cooked, and a filling-port bonding step of bonding the filling port 5 of the package 20 to seal it. Consists of

The long sheet 1 is intermittently fed downstream from the film roll 2. In the present embodiment, the intermittent feed is set to 260 mm. That is, a two-pitch method corresponding to two lengths S (130 mm) of the folded portion 4 of the package 10 shown in FIG. 4 is employed.

The long sheet 1 sent to the folding section 11 is provided with one edge portions 21 and 22 of the first and second plates 11a and 11b.
As a result, the guide portion 24 is bent along the longitudinal direction, and is folded into three in the downstream overlapping portion 25.

The long sheet 1 folded in three by the folding section 11 is intermittently fed to the first bonding section 12 on the downstream side. At the first bonding portion 12, the receiving member 12a and the heating member 12a
b are relatively close to each other and the inner film 1 near the bent edge portion 30
b are heat-sealed to form the back pasting portion 7.

The heating member 12b includes a long sheet 1
Since a non-contact recessed portion (a portion that is not heat-sealed) that does not come into contact with the heat sink is provided, a steam discharge passage 6 is formed in the back pasting portion 7. In this embodiment, the back pasting portion 7 having a length of 260 mm is formed by one heat fusion.

The long sheet 1 in which the back adhering portion 7 is continuously formed in the longitudinal direction is sent to the entire bent portion 13.
The long sheet 1 is moved to the left end 1c by the former 13a.
From the right and left by a pair of rollers 13b, 13b that repeat rotation and stop in synchronization with the intermittent feeding of the long sheet 1 and are pressed, as shown in FIG. As shown in b),
A filling port 5 in which both ends 1c and 1d face each other is formed.

In the long sheet 1 in which the back bonding portion 7 and the filling port 5 are formed as described above, the inner films 1b are thermally fused in the short direction by the second bonding portion 14, so that a predetermined lengthwise direction is obtained. Side portions 3 are formed at intervals. As a result, only the upper filling port 5 communicates with the atmosphere to form a series of packaging bags 20 having the accommodating space 9 capable of accommodating the article to be cooked. Since the outer film 1a has no heat-sealing property, the outer surface 7a of the back pasting portion 7 and the outer surface of the packaging bag 20 facing the back pasting portion 7 are not bonded. (See FIG. 3 (b).)
Are provided in the same set (two) as the number of pitches (2 pitches), so that a plurality of side portions 3 are formed on the long sheet 1 by one intermittent feed. Further, the formed accommodation space 9 communicates with the steam discharge passage 6 of the back pasting portion 7.

The above-described series of packaging bags 20 are filled with articles to be cooked by the filling machine 17. At this time, the two filling nozzles 17a and 17b descend toward the two filling ports 5 and are inserted into the accommodating space 9 as indicated by broken lines in FIG. 1, and are stored through the filling nozzles 17a and 17b. The space 9 is filled with the items to be cooked.

The packaging bag 20 filled with the items to be cooked becomes the package 10 in which the filling port 5 is sealed by the filling port bonding portion 16 to accommodate the items to be cooked inside. Here, a series of packaging bags 20 are formed by a pair of flat seal bars 16a and 16b.
The two filling ports 5 are simultaneously heat-sealed by one intermittent feed (two pitches).

A series of packages 10 in which the filling port 5 is closed
Is cut into the side portions 3 by a cutter device having a pair of cutter blades, and becomes individual packages 10 accommodating the articles to be cooked therein.

As described above, in the present embodiment, the package 10 can be manufactured by the above-described method.
A back pasting portion 7 having a steam discharge passage 6 is continuously formed along the longitudinal direction of the long sheet 1, a plurality of packaging bags 20 having a filling port 5 are formed by a bag making process, and a packaging bag 20 is formed by a filling process. And a plurality of packages 10 can be continuously formed by sealing the filling port 5 by a filling port bonding step. Further, the side portions 3 are cut to separate individual packages 1.
It is also possible to set it to 0, and mass production of the package 10 in which the article to be cooked is stored becomes possible.

Further, since the back pasting portion forming step, the bag making step, the filling step, the filling port bonding step, and the cutter device are synchronized and linked, the individual packages in which the articles to be cooked are accommodated from the sheet roll 2 are stored. The process during the formation of the body 10 can be configured on one line, and space can be saved. Furthermore, since a plurality of packages 10 can be manufactured simultaneously by one intermittent feeding, the manufacturing speed is high and suitable for mass production, and as a result, the packages 10 can be manufactured at low cost.

In the above-described embodiment, the intermittent feeding of the long sheet 1 is performed in the front-rear width S of the package 10 in order to increase the overall manufacturing speed while considering the time required for each step.
(130 mm) is set to 260 mm, which is equivalent to two portions, but may be appropriately adjusted according to the front and rear width S of the package 10. The feed pitch is the width S (13
0 mm), that is, one pitch, or conversely, three pitches or more.

Furthermore, in the above-described embodiment, the configuration has been described in which the back bonding portion 7 is formed by folding in three by the folding portion 11 and then performing heat fusion with the first bonding portion 12.
The back pasting portion forming step is not limited to the above-described configuration. For example, first, the sheet inner surfaces 1b near the bent edge portion 30 formed by this bending are folded in two along the longitudinal direction. The present invention is also intended as a back-pasted portion forming step in which the left and right ends of the long sheet 1 are folded back along the longitudinal direction to be folded into three folds.

The shape of the back adhering portion 7 is not limited to the above-described embodiment, but is within the range intended by the present invention as long as it has the steam discharge passage 6. Also, various shapes and configurations capable of discharging the steam generated from the food stored in the storage space 9 to the outside during the heat treatment in the microwave oven are applicable.

In the method for manufacturing a packaging bag according to the present invention, the filling step and the filling port bonding step in the above configuration are unnecessary.

In the method of manufacturing a package according to the present invention, the filling by the filling machine 17 can be performed substantially simultaneously with the bonding by the second bonding portion 14. That is, after bending the long sheet 1 on which the back pasting portion 7 is formed in the back pasting portion forming step along the longitudinal direction, the sheet inner surface 1b
The bag making process of forming the packaging bag 20 by adhering them to each other in the transverse direction and the filling process of filling the inside of the packaging bag 20 formed by the bag making process are performed substantially simultaneously. It is also possible. However, in order to ensure the heat-sealing property of the side part 3, it is preferable to fill the article to be cooked after the side part 3 is formed by the second bonding part 14.

[0048]

As described above, in the method for manufacturing a packaging bag according to the present invention, a back-pasted portion forming step of forming a back-pasted portion along a longitudinal direction on a long sheet, Since it comprises a bag making process of forming a packaging bag by forming the bag into a bag shape, it becomes possible to continuously manufacture a plurality of packaging bags having a back pasted portion provided with a steam discharge passage from a long sheet, which is suitable for mass production. I have.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a method and an apparatus for manufacturing a package of the present invention.

FIG. 2A is a plan view of a folding section. (B) is an end view seen from the arrow direction in the cutting line AA of FIG.

FIGS. 3 (a) and 3 (b) respectively show a section line B- in FIG. 1;
B, CC are end views as viewed from the direction of the arrows.

FIG. 4 is a perspective view of a package manufactured by the manufacturing apparatus of the present invention.

FIG. 5 is a perspective view of a package.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Long sheet, 3 ... Side part, 4 ... Folding part, 5 ... Filling port, 6 ... Steam discharge passage, 7 ... Back paste part, 9 ... Storing space,
10: package, 11: folding part, 11a: first plate,
11b: second plate, 12: first adhesive part, 13: whole bent part, 14: second adhesive part, 16: filling port adhesive part, 17
... Filling machine, X ... Transport direction, 20 ... Packaging bag, 30 ... Bent edge

Claims (3)

[Claims] 1. A long sheet (1) is bent in a longitudinal direction, and sheet inner surfaces (1b) near a bent edge (30) of the long sheet (1) are bonded to each other to discharge steam. A back-paste portion forming step of forming a back-paste portion (7) having a passage, and a long sheet (1) on which the back-paste portion (7) is formed by the back-paste portion formation step is bent along the longitudinal direction. And then bonding the sheet inner surfaces (1b) to each other across the transverse direction to form a bag-like shape. 2. A long sheet (1) is bent in the longitudinal direction, and the sheet inner surfaces (1b) near a bent edge (30) of the long sheet (1) are adhered to each other to discharge steam. A back-paste portion forming step of forming a back-paste portion (7) having a passage, and a long sheet (1) on which the back-paste portion (7) is formed by the back-paste portion formation step is bent along the longitudinal direction. Then, the inner surfaces (1b) of the sheets are transversely adhered to each other to form a packaging bag (20), and the package is housed in the packaging bag (20) formed by the packaging process. A method for manufacturing a package, comprising: a filling step of filling an object; and a filling port bonding step of bonding and sealing the filling port (5) of the packaging bag (20) filled in the filling step. 3. A back pasting portion forming means for forming a back pasting portion (7) having a vapor discharge passage along a longitudinal direction in the long sheet (1), and the back pasting portion (7) is formed by the back pasting portion forming means. )
Forming the long sheet (1) on which the sheet is formed into a bag to form a packaging bag (20), and filling the contents into the inside of the packaging bag (20) formed by the bag making means. And a filling port bonding means for bonding and sealing the filling port (5) of the packaging bag (20) filled with the contents by the filling means. Folding part (1) for bending the shaku sheet (1) along the longitudinal direction
1) bonding the inner surfaces (1b) of the sheet near the folded edge portion (30) overlapped by the folded portion (11) to form a back adhering portion (7) having a steam discharge passage. An adhesive portion (12), wherein the bag-making means is a whole fold for bending the long sheet (1) on which the back pasting portion (7) is formed by the back pasting portion forming means along the longitudinal direction. A bent portion (13); and a second bonding portion (14) for bonding the sheet inner surfaces (1b) folded by the overall bent portion (13) across the short side direction and bonding them together. Packaging manufacturing equipment.