JPH1128771A - Method and apparatus for manufacturing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically separate a fastening tape during the step of manufacturing a plastic bag by separating upper and lower fastner material after fastner sealing, then point sealing it and laterally sealing upper and lower body materials in this state. SOLUTION: Upper and lower fastner materials and body materials 1 are respectively sealed by a fastner sealing unit 4 at one side edges of the materials 1. Further, the other side edges of the materials 1 are longitudinally sealed to the upper and lower materials 1 by a longitudinal sealing unit 5. Then, a spatula 16 is inserted between the fastner materials of upper and lower sides to separate the materials. Thereafter, the upper and lower materials are point sealed at a lateral sealing position of the material 1, and the upper and lower body materials are laterally sealed by a lateral sealing unit 7. Thus, when a plastic bag B is manufactured, the tapes can be discharged in separate state from one another.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making method and a bag making machine for producing a plastic bag having a zipper tape.

[0002]

2. Description of the Related Art Plastic bags having male and female chuck tapes are used as plastic bags for filling contents such as beverages. The zipper tape is for closing the opening edge of the plastic bag, and is formed of a plastic strip, and is provided inside the plastic bag. Further, inside the plastic bag, the male and female chuck tapes face each other, extend along the opening edge of the plastic bag, and are heat-sealed or ultrasonic-sealed to the inner surface thereof. Therefore, it is well known that the male and female chuck tapes can be fitted together to close the opening edge of the plastic bag.

[0003] In a bag making machine for producing a plastic bag having a zipper tape, generally, upper and lower two layers of body material are superimposed on each other and guided to a chuck seal device, a vertical seal device, a horizontal seal device and a cutter. The body material is made of a plastic film. Further, a pair of upper and lower chuck members are fitted to each other, guided between the upper and lower trunk members, and the trunk members and the chuck members are intermittently fed in the longitudinal direction. Of the pair of upper and lower chuck members, one is a male chuck member and the other is a female chuck member, both of which are formed of a plastic strip, and when intermittently fed,
A chuck material is disposed between the upper and lower body members and extends along one side edge thereof.

Further, each time the body material and the chuck material are intermittently fed, the upper chuck material and the upper body material are heat-sealed or ultrasonic-sealed at one side edge of the body material by a chuck sealing device. The chuck material and the lower body material are heat-sealed or ultrasonically sealed, whereby the upper chuck material and the upper body material are chuck-sealed, and the lower chuck material and the lower body material are chuck-sealed. Furthermore, each time the body material and chuck material are intermittently fed,
At the other side edge of the body, the upper body and the lower body are heat-sealed or ultrasonically sealed by the vertical sealing device, thereby vertically sealing the upper body and the lower body. Thereafter, each time the body material and the chuck material are intermittently fed, the upper body material and the lower body material are heat-sealed or ultrasonic-sealed by the horizontal sealing device, thereby being horizontally sealed. Thereafter, the body material and the chuck material are cross-cut by the cutter.

Thus, a plastic bag having a zipper tape is manufactured. Regarding the opening edge and the bottom edge of the plastic bag, one side edge of the body material forms an opening edge of the plastic bag, and the other side edge of the body material forms a bottom edge of the plastic bag. The chuck tape is made of a cross-cut chuck material. Thereafter, the plastic bag is discharged from the bag making machine, and in the filling machine, contents such as beverages are filled from the opening edge of the plastic bag and stored therein.

By the way, a pair of upper and lower chuck members are fitted to each other, chuck-sealed and cross-cut as they are. Therefore, when the plastic bag is manufactured, the chuck tapes are fitted to each other, the opening edge of the plastic bag is closed by the chuck tape, and the plastic bag is discharged in that state. Therefore, after that, in order to fill the contents from the opening edge of the plastic bag in the filling machine, it is necessary to temporarily separate the chuck tape of the plastic bag, and until now, the chuck tape of the plastic bag is manually separated. However, the zipper tape must be separated for each plastic bag, which is troublesome, requires time and labor, and its improvement is demanded.

[0007]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to automatically separate a zipper tape of a plastic bag in a method and a machine for manufacturing a plastic bag having a zipper tape.

[0008]

The invention according to this application is two inventions. According to the first invention, the upper and lower two-layer body members made of a plastic film are overlapped with each other. further,
A pair of upper and lower chuck members made of a plastic strip are fitted to each other, guided between the upper and lower body members, and the body member and the chuck member are intermittently fed in the longitudinal direction. Further, for each intermittent feed, the upper chuck material and the upper body material are chuck-sealed with each other, the lower chuck material and the lower body material are chuck-sealed with each other, and thereafter, the upper body material and the lower body material are chucked. The shells are transversely sealed to each other.
Further, according to the first invention, after the chucking of the chuck material, the upper chuck material and the lower chuck material are separated from each other. Thereafter, at the horizontal sealing position of the body material, the upper chuck material and the lower chuck material are point-sealed with each other, and in this state, the upper body material and the lower body material are horizontally sealed.

According to the second aspect of the present invention, the upper and lower body members made of a plastic film are overlapped with each other and guided to the chuck seal device and the horizontal seal device. further,
A pair of upper and lower chuck members made of a plastic strip are fitted to each other, guided between the upper and lower body members, and the body member and the chuck member are intermittently fed in the longitudinal direction. Further, each time the intermittent feeding is performed, the upper chuck material and the upper body material are chuck-sealed by the chuck seal device, the lower chuck material and the lower body material are chuck-sealed, and then the upper seal material is transferred by the horizontal sealing device. The body material and the lower body material are horizontally sealed. Further, according to the second aspect, the spatula is disposed between the chuck seal device and the horizontal seal device, and is inserted between the upper chuck material and the lower chuck material. Therefore, with the intermittent feeding of the body material and the chuck material, the upper chuck material and the lower chuck material are separated by the spatula. Further, between the chuck seal device and the horizontal seal device, the point seal device is disposed at a downstream position of the spatula, and at the horizontal seal position of the body material, the upper chuck material and the lower chuck material are point-sealed by the point seal device. You.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

In FIG. 1 and FIG. 2, this is a bag making machine for producing a plastic bag having a zipper tape.
FIG. 5 shows the manufactured plastic bag B. The plastic bag B is made of a plastic film, and is heat-sealed or ultrasonically sealed along the bottom edge and the side edge, and has a heat-sealed portion or an ultrasonic seal portion S at the bottom edge and the side edge. Further, the plastic bag B has male and female chuck tapes C. FIG. 6 shows the chuck tape C. The chuck tape C is for closing the opening edge E of the plastic bag C, and is formed of a plastic strip, and is provided inside the plastic bag B. Further, inside the plastic bag B, male and female chuck tapes C face each other, extend along the opening edge E of the plastic bag B, and are heat-sealed or ultrasonically sealed on the inner surface thereof. Therefore, the male and female chuck tapes C can be fitted together to close the opening edge E of the plastic bag B.

In this bag making machine, the upper and lower two layers of body material 1 are overlaid on each other. The body 1 is made of a plastic film. Further, a pair of upper and lower chuck members 2 are fitted to each other, and this is guided between the upper and lower body members 1, and the body members 1
And the chuck material 2 is intermittently fed in the longitudinal direction.
Of the pair of upper and lower chuck members 2, one is a male chuck member and the other is a female chuck member, both of which are formed of a plastic strip. It is arranged between the lower body members 1 and extends along one side edge 3 thereof. Each time the body material 1 and the chuck material 2 are intermittently fed, the upper chuck material 2 and the upper body material 1 are chuck-sealed with each other, and the lower chuck material 2 and the lower body material 1 are chuck-sealed with each other. Thereafter, the upper body member 1 and the lower body member 1 are horizontally sealed with each other.

In this embodiment, the upper and lower two layers of the body material 1 are superimposed on each other, guided to the chuck seal device 4 and the vertical seal device 5, passed through the feed roller 6 and passed through the horizontal seal device 7.
It is led to. Further, the body 1 is guided to the cutter 9 through the feed roller 8. The chuck seal device 4, the vertical seal device 5, and the horizontal seal device 7 are composed of a heat seal device or an ultrasonic seal device. Further, a pair of upper and lower chuck members 2 are fitted to each other, guided between the upper and lower body members 1, and intermittently fed by the feed rollers 6 and 8. Then, each time the intermittent feed is performed, the chuck member 2 and the upper body member 1 are attached to one side edge 3 of the body member 1 by the chuck seal device 4.
Is heat-sealed or ultrasonic-sealed, and the lower chuck material 2 and the lower body material 1 are heat-sealed or ultrasonic-sealed. As a result, the upper chuck member 2 and the upper body member 1 are chuck-sealed, and the lower chuck member 2 and the lower body member 1 are chuck-sealed to form a seal region 10. Further, each time the body material 1 and the chuck material 2 are intermittently fed, the upper body material 1 and the lower body material 1 are heat-sealed or ultrasonically sealed at the other side edge 11 of the body material 1 by the vertical sealing device 5. As a result, the upper body member 1 and the lower body member 1 are vertically sealed, and a sealed region 12 is formed. Thereafter, each time the body material 1 and the chuck material 2 are intermittently fed, the upper body material 1 and the lower body material 1 are heat-sealed or ultrasonically sealed by the horizontal sealing device 7. Thereby, the upper body 1 and the lower body 1
Are sealed laterally to form a sealed area 13 thereof. Further, after that, the body 9 and the chuck 2 are cross-cut by the cutter 9 every time the body 1 and the chuck 2 are intermittently fed.

Thus, the plastic bag B shown in FIG. 5 is manufactured. Regarding the opening edge E and the bottom edge of the plastic bag B, the opening edge E of the plastic bag B is formed by one side edge 3 of the body 1, and the bottom edge of the plastic bag B is formed by the other side edge 11 of the body 1. Is formed.
The chuck tape C is made of the cross-cut chuck material 2. Thereafter, the plastic bag B is discharged from the bag making machine, and in the filling machine, contents such as beverages are filled from the opening edge E of the plastic bag B and stored therein.

Furthermore, in this bag making machine, after the chucking of the chuck member 2, the upper chuck member 2 and the lower chuck member 2 are separated from each other. Thereafter, at the horizontal sealing position of the body 1, the upper chuck material 2 and the lower chuck material 2 are point-sealed with each other, and in this state, the upper body 1 and the lower body 1 are horizontally sealed. The details are as follows.

In this embodiment, a pre-seal device 14 is arranged downstream of the feed roller 6 between the chuck seal device 4 and the horizontal seal device 7. The pre-seal device 14 also includes a heat seal device or an ultrasonic seal device. Then, similarly to the horizontal sealing device 7, the pre-sealing device 14 heat-seals the upper body material 1 and the lower body material 1 at the horizontal sealing position of the body material 1 every time the body material 1 and the chuck material 2 are intermittently fed. Alternatively, ultrasonic sealing is performed to form the sealing region 15, but the sealing region 15 is kept at a fixed length and does not reach the position of the chuck member 2.

Further, a spatula 16 is disposed between the chuck seal device 4 and the horizontal seal device 7 at a position downstream of the pre-seal device 14, and is inserted between the upper chuck material 2 and the lower chuck material 2. As shown in FIGS. 3 and 4, the spatula 16 is made of a fixed length metal plate and has a slot 17 extending in the length direction. Further, a bolt 18 passes through the slot 17, and the spatula 16 is attached and fixed by the bolt 18. Therefore, the upper chuck material 2 and the lower chuck material 2 are separated by the spatula 16, which is not involved in the intermittent feeding of the body material 1 and the chuck material 2. Further, in this embodiment, at the tip of the spatula 16, metal pieces 19
Is attached, whereby a groove 20 is formed. At one end of the groove 20, a notch 21 is formed in the spatula 16, and the upper chuck material 2 and the lower chuck material 2 are separated by the spatula 16. At this time, the fitting portion is guided to the notch 21 of the spatula 16, and is inserted into the groove 20 of the spatula 16 and guided. The spatula 16 can be loosened by the bolt 18 and the spatula 16 can be displaced by the slot 17 so that the position of the groove 20 can be adjusted.

Further, a point seal device 22 is provided between the chuck seal device 4 and the horizontal seal device 7.
It is located at the downstream position. Point seal device 22
Also comprises a heat sealing device or an ultrasonic sealing device.
Each time the body material 1 and the chuck material 2 are intermittently fed, the point seal device 22 is placed at the horizontal sealing position of the body material 1.
Thereby, the upper chuck member 2 and the lower chuck member 2 are heat-sealed or ultrasonic-sealed. As a result, the upper chuck member 2 and the lower chuck member 2 are point-sealed, and a sealed portion 23 is formed.

Therefore, in the case of this bag making machine, a pair of upper and lower chuck members 2 are fitted to each other and chuck-sealed as they are. Thereafter, the upper chuck member 2 and the lower chuck member 2 are automatically separated. Is done. Thereafter, the upper chuck member 2 and the lower chuck member 2 are point-sealed with each other at the horizontal sealing position of the body member 2, and in this state, the upper body member 1 and the lower body member 2 are horizontally sealed. It is.
Thereafter, the body material 1 and the chuck material 2 pass through the feed roller 8 and are guided to the cutter 9. At a position corresponding to the chuck material 2, an outer circumferential groove is formed in the feed roller 8, and when the feed material passes through the feed roller 8. And the chuck member 2 are housed in the outer circumferential groove. Therefore, the upper chuck material 2 and the lower chuck material 2 are sandwiched between the feed rollers 8 and are not compressed, and the chuck material 2 is kept separated.
It is led to the cutter 9. And the body material 1 is
And the chuck material 2 is cross-cut, whereby a plastic bag B having a chuck tape C is manufactured.

Therefore, when the plastic bag B is manufactured, the chuck tapes C are separated from each other, whereby the opening edge E of the plastic bag B is opened,
The plastic bag B is discharged in that state. Therefore, when the content is subsequently filled from the opening edge E of the plastic bag B in the filling machine, the content can be filled as it is. It is not necessary to once separate the chuck tape C, and the operation is easy.

FIG. 7 shows another embodiment. In this bag making machine, the bottom member 24 is folded in two along the longitudinal center line, and at the other side edge 11 of the body member 1, the bottom member 24 is divided into the upper body member 1 and the lower body member 1. Inserted between. Thereafter, the body member 1 and the bottom member 24 are vertically sealed by the vertical sealing device 5,
The seal area 25 is formed. Therefore, as shown in FIG. 8, a gusset-shaped bottom portion G is provided at the bottom edge of the plastic bag B. This is what is called a standing pouch, and can be made independent by itself.

As with the embodiment shown in FIG. 1, a pair of upper and lower chuck members 2 are fitted to each other and sealed as they are as in the embodiment shown in FIG.
6 separates the upper chuck member 2 and the lower chuck member 2. Then, at the horizontal sealing position of the body material 2,
The upper seal material 2 and the lower chuck material 2 are point-sealed with each other by the point seal device 22, and in this state, the upper body material 1 and the lower body material 2 are horizontally sealed.
Further, after that, the body material 1 and the chuck material 2 are cross-cut by the cutter 9, whereby the plastic bag B having the chuck tape C is manufactured. Therefore, when filling the contents from the opening edge E of the plastic bag B in the filling machine, the contents can be filled as it is, and there is no need to once separate the chuck tape C.

[0023]

As described above, according to the present invention, the chuck tape C of the plastic bag B is automatically separated. Therefore, when filling the contents from the opening edge E of the plastic bag B in the filling machine, the contents can be filled as it is. It is not necessary to once separate the chuck tape C, the operation is easy, and the intended purpose can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of a body material, a chuck material, and a spatula of FIG. 1;

FIG. 3 is an enlarged plan view of the spatula of FIG. 1;

FIG. 4 is a front view of the spatula of FIG. 3;

FIG. 5 is an explanatory view of a plastic bag manufactured by the bag making machine of FIG. 1;

FIG. 6 is an explanatory view of the chuck tape of FIG. 5;

FIG. 7 is a plan view showing another embodiment.

FIG. 8 is an explanatory view of a plastic bag manufactured by the bag making machine of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body material 2 Chuck material 4 Chuck seal device 7 Horizontal seal device 16 Spatula 22 Point seal device

Claims (2)

[Claims] An upper and lower two-layer body member made of a plastic film is overlapped with each other, and a pair of upper and lower chuck members made of a plastic strip are fitted to each other, and guided between the upper and lower body members. The body material and the chuck material are intermittently fed in the length direction thereof, and each time the intermittent feed is performed, the upper chuck material and the upper body material are chuck-sealed with each other,
A bag making method in which the lower chuck material and the lower body material are chuck-sealed with each other, and then the upper body material and the lower body material are horizontally sealed with each other. The upper chuck material and the lower chuck material are point-sealed with each other at the horizontal sealing position of the body material, and in this state, the upper body material and the lower chuck material are separated from each other. A bag-making method, characterized by laterally sealing a side body material. 2. An upper and lower two-layer body member made of a plastic film is superimposed on each other, guided to a chuck seal device and a horizontal seal device, and a pair of upper and lower chuck members made of a plastic strip are fitted to each other. And the lower body member is guided, the body member and the chuck member are intermittently fed in the longitudinal direction, and the upper chuck member and the upper body member are chuck-sealed by the chuck sealing device at each intermittent feed. A bag-making machine for chuck-sealing the lower chuck material and the lower body material, and then horizontally sealing the upper body material and the lower body material by the horizontal sealing device,
Arranged between the chuck seal device and the horizontal seal device, inserted between the upper chuck material and the lower chuck material, with the intermittent feed of the body material and the chuck material,
A spatula that separates the upper chuck material and the lower chuck material, between the chuck seal device and the horizontal seal device, at a downstream position of the spatula, and at a horizontal seal position of the trunk material, the upper chuck material And a point sealing device for point-sealing the lower chuck material.