JP4044157B2 - Bag making machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a bag making machine for manufacturing standing pouches or gusset bags.
[0002]
[Prior art and its problems]
In a bag making machine that manufactures a standing pouch, a triangular base plate is used to fold a bottom material having a relatively small width along a longitudinal center line thereof, which is guided between a pair of body materials, and a heat sealing bar to form the body material. And the bottom material is heat sealed. Thereby, a standing pouch is manufactured. In a two-row bag making machine, a pair of bottom members are folded in half, guided between a pair of body members, and heat-sealed by a heat seal bar, whereby two rows of standing pouches are manufactured simultaneously.
[0003]
However, in the case of a two-row bag making machine, it is necessary to provide a pair of feeding mechanisms for feeding a pair of bottom materials, and to provide a pair of triangular plates for folding it in half. There is a problem that it is complicated. Furthermore, when the body and the bottom material are sent to the heat seal bar, it is necessary to keep the tension of each bottom material the same. If a difference occurs in the tension of each bottom material, the body material and the bottom material cannot be accurately fed.
[0004]
Bag making machines that produce gusset bags have similar problems.
[0005]
OBJECT OF THE INVENTION
Accordingly, an object of the present invention is to simplify the structure of a bag making machine for manufacturing a standing pouch and to prevent problems associated with the tension of the bottom material.
[0006]
Furthermore, this invention aims at simplifying the structure in the bag making machine which manufactures a gusset bag.
[0007]
[Structure of the invention]
According to this invention, the bottom plate having a relatively large width is folded back from both side edges thereof , folded in two on both sides of the longitudinal center line, and the both side edges are folded back to the position of the longitudinal center line; and
Means for guiding the bottom material between the pair of body members after folding the bottom material in half;
A feed roller for intermittently feeding the body and bottom material;
For each intermittent feed of the body and the bottom material, a heat seal bar for heat-sealing the body and the bottom material,
With the intermittent feed of the cylinder member and a bottom member, a slitter for slitting the barrel material and Sokozai along said longitudinal centerline,
Each intermittent feed of the body and bottom material comprises a cutter that cuts the body and bottom material,
A bag making machine is provided in which a standing pouch is manufactured by the body and the bottom material.
Furthermore, according to the present invention, a forming plate that folds back a relatively large width gusset material from both side edges thereof, folds the gusset material on both sides of the longitudinal center line, and folds the both side edges to the position of the longitudinal center line. When,
Means for guiding the gusset material between a pair of trunks after folding the gusset material in half;
A feed roller for intermittently feeding the body material and the gusset material;
For each intermittent feed of the body and gusset material, a heat seal bar for heat sealing the body and gusset material;
A slitter that slits the body and the gusset material along the longitudinal center line in accordance with the intermittent feeding of the body and the gusset material,
Each intermittent feed of the body and gusset material comprises a cutter that cuts the body and gusset material,
A bag making machine is provided in which a gusset bag is manufactured by the body material and the gusset material.
[0008]
[Explanation of Examples]
Examples of the present invention will be described below.
[0009]
In FIG. 1, this is a bag making machine for producing a standing pouch, which has two rows and has a forming plate 1. The forming plate 1 is for folding the bottom material 2 in half. The bottom material 2 has a relatively large width, is made of a plastic film, passes through the guide roller 3, and is guided to the forming plate 1.
[0010]
As shown in FIG. 2, the forming plate 1 includes a triangular portion 4 and a rectangular portion 5, and the rectangular portion 5 extends horizontally. The triangular part 4 is bent at a certain angle with respect to the rectangular part 5, tilted, fixed to and supported by the support material 6, and the bottom material 2 is folded back from both side edges 7 and guided to the hypotenuse 8 of the triangular part 4. Is done. As a result, the bottom material 2 is folded in half. Further, the holding plate 9 is disposed above the rectangular portion 5, and the folded bottom material 2 is guided between the holding plate 9 and the rectangular portion 5. Therefore, the base plate 2 having a relatively large width is folded back from both side edges 7 by the forming plate 1 and is folded in two on both sides of the longitudinal center line 10. In this embodiment, both side edges 7 of the bottom material 2 are folded back to the position of the center line 10 in the length direction of the bottom material 2.
[0011]
Further, after the bottom material 2 is folded in half, the bottom material 2 passes through the feeding roller 11, the dancer roller 12, the guide roller 13 and the bottom punch 14 and is guided between the pair of body materials 15. The body 15 is also made of a plastic film. In this embodiment, the pair of body members 15 pass through the dancer roller 16 and the guide roller 17 and face each other, and as shown in FIGS. 4 and 5, at the position of the longitudinal center line 18 of the body member 15, The folded bottom material 2 is guided between the body members 15. Further, the body 15 and the bottom material 2 pass through the heat seal bar 19, the feed roller 20, the heat seal bar 21, the slitter 22 and the feed roller 23, and are guided to the cutter 24, and are fed to the body 15 and the bottom by the feed rollers 20 and 23. The material 2 is intermittently fed. When the bottom material 2 is intermittently fed, the dancer roller 12 is lowered and lowered by the tension of the bottom material 2, and in response thereto, the speed of the feeding roller 11 is controlled by the control device, and the rotational speed thereof is increased. As a result, the bottom material 2 is fed out and the fluctuation in tension is relaxed. The tension fluctuation of the body 15 is also alleviated by the dancer roller 16.
[0012]
The body 15 and the bottom material 2 are heat sealed by the heat seal bar 19 every time the body 15 and the bottom material 2 are intermittently fed. The heat seal bar 19 has a heat seal surface having the shape shown in FIG. Accordingly, the bottom seal region 25 is formed in the body member 15 and the bottom member 2. Further, every time the body 15 and the bottom material 2 are intermittently fed, the body 15 and the bottom material 2 are heat sealed by the heat seal bar 21, and a cross seal region 26 is formed in the body 15 and the bottom material 2. A hole can also be formed by a bottom punch 14 at a predetermined location of the bottom material 2 every time the body 15 and the bottom material 2 are intermittently fed. Furthermore, after that, every time the body 15 and the bottom material 2 are intermittently fed, the body 15 and the bottom material 2 are slit by the slitter 22, and the body 15 and the bottom material 2 are cut by the cutter 24. The body material 15 and the bottom material 2 are slit along the longitudinal center line 18 of the body material 15 and cut along the width direction center line 27 of the cross seal region 26. Thus, a standing pouch is manufactured.
[0013]
In the embodiment shown in FIG. 1, the feed roller 11 and the dancer roller 12 are provided downstream of the forming plate 1. However, the feed roller 11 and the dancer roller 12 are provided upstream of the forming plate 1, and the bottom material 2 is intermittently provided. When feeding, the bottom material 2 may be fed out by the feeding roller 11 and the dancer roller 12 upstream of the forming plate 1 so as to relieve fluctuations in tension.
[0014]
FIG. 6 shows a three-row arrangement . In this bag making machine, in addition to the bottom material 2, a bottom material 28 having a relatively small width is guided to another forming plate 1, and the bottom material 28 is placed on one oblique side 8 in the triangular portion 4 of the forming plate 1. Guided and folded in half along the longitudinal centerline. This is guided between the body members 15, the bottom seal region and the cross seal region are formed in the body member 15 and the bottom members 2 and 28, and three rows of standing pouches are manufactured simultaneously. 7 and 8 show a four-row arrangement . In this bag making machine, in addition to the bottom material 2, each of the bottom materials 29 and 30 having a relatively small width is folded in half, which is guided between the body materials 15, and four rows of standing pouches are manufactured simultaneously. As shown in FIG. 9 and FIG. 10 , in addition to the bottom material 2, a bottom plate 31 having a relatively large width is folded back from both side edges by a forming plate, and is folded in two on both sides of the longitudinal center line. It is also possible to produce four standing pouches at the same time guided between the body members 15.
[0015]
11 and 12 show a bag making machine for producing gusset bags. In this bag making machine, the gusset material 2 having a relatively large width is folded back from both side edges 7 by the forming plate 1 as in the bag making machine of FIGS. 7 and 8 , and 2 on both sides of the longitudinal center line 10. It is folded and guided between the pair of body members 15. At the same time, the gusset members 29 and 30 having a relatively small width are folded in two along the longitudinal center line and guided between the body members 15. Thereafter, the body 15 and the gusset materials 2, 29, 30 are heat sealed by the heat seal bar, and the gusset seal region 32 and the cross seal region 33 are formed in the body 15 and the gusset materials 2, 29, 30. Further, the body material 15 and the gusset material 2 are slit along the longitudinal center line 18 of the body material 15, and the body material 15 and the gusset materials 2, 29, 30 are cut at a position 34 near the cross seal region 33. . Therefore, two rows of gusset bags can be manufactured simultaneously.
[0016]
【The invention's effect】
As described above, according to the present invention, when two rows of standing pouches are manufactured at the same time in a two-row bag making machine, this can be achieved by the single bottom material 2. A single bottom member 2 may be folded at both side edges 7 and folded at both sides of the longitudinal center line 10 and guided between a pair of body members 15. It is not necessary to fold each of them in half and guide them between a pair of body members, and the configuration is simple. There is no problem with the tension of the bottom material. In a three-row and four-row bag making machine, three or four rows of standing pouches can be manufactured simultaneously. Furthermore, in a two-row bag making machine, two rows of gusset bags can be manufactured at the same time, the configuration is simple, and the intended purpose can be achieved.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of the present invention.
FIG. 2 is a perspective view of the forming plate of FIG.
3 is a bottom view showing a heat seal surface of the heat seal bar of FIG. 1. FIG.
4 is a plan view of the body and bottom material of FIG. 1. FIG.
FIG. 5 is a cross-sectional view taken along the line VV in FIG.
FIG. 6 is a cross-sectional view showing another embodiment.
FIG. 7 is a plan view showing another embodiment.
8 is a cross-sectional view of the barrel material and Sokozai in FIG.
FIG. 9 is a plan view showing another embodiment.
10 is a cross-sectional view of the barrel material and Sokozai in FIG.
FIG. 11 is a plan view showing another embodiment.
Is a cross-sectional view of the barrel material and gusset material 12 is a diagram 11.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Forming plate 2 Bottom material 7 Both-sides edge 15 Body material 19,21 Heat seal bar

Claims (2)

A forming plate that folds back a base material having a relatively large width from both side edges thereof , folds the two side edges on both sides of the longitudinal center line, and folds the both side edges to the position of the longitudinal center line ;
Means for guiding the bottom material between the pair of body members after folding the bottom material in half;
A feed roller for intermittently feeding the body and bottom material;
For each intermittent feed of the body and the bottom material, a heat seal bar for heat-sealing the body and the bottom material,
With the intermittent feed of the cylinder member and a bottom member, a slitter for slitting the barrel material and Sokozai along said longitudinal centerline,
Each intermittent feed of the body and bottom material comprises a cutter that cuts the body and bottom material,
A bag making machine characterized in that a standing pouch is manufactured by the body material and the bottom material. A forming plate that folds back a relatively large width gusset material from both side edges thereof , folds it twice on both sides of the longitudinal center line, and folds the both side edges to the position of the longitudinal center line ;
Means for guiding the gusset material between a pair of trunks after folding the gusset material in half;
A feed roller for intermittently feeding the body material and the gusset material;
For each intermittent feed of the body and gusset material, a heat seal bar for heat sealing the body and gusset material;
A slitter that slits the body and the gusset material along the longitudinal center line in accordance with the intermittent feeding of the body and the gusset material,
Each intermittent feed of the body and gusset material comprises a cutter that cuts the body and gusset material,
A bag making machine characterized in that a gusset bag is manufactured by the body material and the gusset material.

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