JP3756329B2 - Method and apparatus for attaching a cut line of a synthetic resin continuous bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for attaching a cut line of a synthetic resin continuous bag.
[0002]
[Prior art]
In order to separate the synthetic resin continuous bag side-sealed at a predetermined interval into a single bag or a required number of continuous bags, a streak or a perforated cut line is attached to the side seal portion. For example, as disclosed in JP-B-49-47547, the cut-off line is attached by side-sealing a folded synthetic resin film that is intermittently transferred and stopped on the cradle with a side seal bar. The side seal portion is moved to the cut line attaching work position, the cut line attached blade moving up and down with respect to the film surface arranged below the film is brought into contact with the side seal portion, and the side seal portion is pressed by the pressing roller arranged above the film. Is pressed and rolled, and a cutting line is attached by a cutting line attaching blade.
[0003]
[Problems to be solved by the invention]
In the above conventional technique, the side seal process and the cut line attaching process are performed at separate positions. Therefore, the side seal portion that is side-sealed in the side seal process by performing a predetermined amount of intermittent transfer is located in the cut line attachment process, but an error in the feed amount occurs in the intermittent transfer, and a cut line is formed at the center in the width of the side seal. It is difficult to attach, and when the tear line is affixed to the inside of the bag body within the width of the side seal, there is a problem of inducing bag breakage from the tear line. In addition, since the side sealing process and the cutting line attaching process are performed at separate positions, the work line of the bag making apparatus becomes long, and a large installation space for the bag making apparatus is required. It takes a lot of processing time for the cutting line installation process.
[0004]
An object of the present invention is to provide a method and an apparatus for installing a cut line for a synthetic resin continuous bag, which shortens the processing time of the side seal and the cut line, and reliably applies the cut line to the center in the width of the side seal. is there.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the method of the present invention is a method of intermittently transferring a cradle in a process of manufacturing a continuous bag body by providing a cut line at a place where side-sealed at a predetermined interval on a folded synthetic resin film. A pair of left and right side seal bars that move left and right to move toward and away from each other along the film surface that stops above , and move to the film surface by making a pair of left and right side seal bars move up and down to perform side sealing; Then, after the side seal, the pair of left and right side seal bars are moved upward and away from the film surface , and the center in the width of the side seal is moved by a hot knife that moves up and down between the pair of left and right side seal bars separated from each other. It is characterized in that a cutting line is attached to the.
[0006]
In the above method, the tear line is a perforated line.
[0007]
Furthermore, the apparatus of the present invention is an apparatus for manufacturing a continuous bag body by providing a cut line at a place where a side seal is provided at a predetermined interval on a folded synthetic resin film, and the apparatus is intermittently transferred and stopped on a cradle. On the film, a pair of left and right side seal bars that move left and right to move toward and away from each other along the film surface and move up and down are provided. The side seal bars are moved closer to each other and moved to the film surface. A hot knife which moves up and down between the pair of left and right side seal bars moved upward and away from the film surface after the side seal is applied, and a cutting line is provided at the center in the width of the side seal. It is characterized by that.
[0008]
Furthermore, in the above apparatus, the hot knife is provided with a concavo-convex cutting edge so as to make a fusing perforation.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of the main part of a bag making apparatus equipped with the apparatus of the present invention. Reference numeral 1 denotes a film original with a synthetic resin chuck, and a film 2 unwound from this is applied to a first dance roll 3. It is constructed so as to be tensioned appropriately and intermittently transferred by the first feed roll 4 in a predetermined amount.
[0010]
A point seal bar 5 is disposed after the first feed roll 4 to crush the thickness of the intersection with a chuck that intersects a side seal, which will be described later, and a cutting line attaching device 6 according to the present invention is provided after the point seal bar 5. Has been placed.
[0011]
A second feed roll 11, a second dance roll 12, and a pulling roll 13 are disposed after the cutting line attaching device 6, and a continuous bag 14 is formed by applying a cutting line to the side seal and the center in the width of the side seal. It is designed to be wound up.
[0012]
The cutting wire attaching device 6 is provided with a receiving base 7 below the film 2 that is intermittently transferred, and a heat-resistant endless belt 8 that runs around the upper surface of the receiving base 7 and circulates around the receiving base 7. Further, above the film 2 at the position of the pedestal 7, the film 2 is moved left and right X so as to approach or separate from each other along the surface of the film 2, and moved up and down Y to provide a side seal. The structure includes a pair of left and right side seal bars 9a and 9b, and a hot knife 10 that vertically moves Z between the pair of left and right side seal bars 9a and 9b to provide a cut line within the width of the side seal. .
[0013]
The hot knife 10 has an edge 10a for attaching a cut line within the width of the side seal. This edge 10a is a straight cutting edge in the case of the cut line streak, It has an uneven edge.
[0014]
Since the present invention has the structure as described above, the film 2 intermittently transferred at a predetermined pitch is side-sealed as shown in FIGS. 3 and 4 by the point seal bar 5 before being transferred to the cutoff line attaching device 6. The crushing portion 18 is formed by pressing the thickness of the intersection with the chuck 16 that intersects the planned line 17.
The film 2 on which the crushing portion 18 is formed is intermittently transferred to the upper surface of the endless belt 8 on the cradle 7 of the cutoff line attaching device 6, and the crushing portion 18 is positioned directly below the side seal bars 9a and 9b. To stop.
[0016]
When the crushing portion 18 is located immediately below the side seal bars 9a and 9b, a side seal 17 is formed at the same position by the side seal bars 9a and 9b, and a cut line 19 is provided at the center in the width of the side seal 17. The
[0017]
This operation will be described with reference to FIG. First, as shown in FIG. 2 (A), the pair of left and right side seal bars 9a, 9b open in the left-right direction and are located above the film 2, and the hot knife 10 is also located above. as shown in B), a pair of right and left seal bars 9a, 9b is downward movement by abutment with horizontal movement X in toward each other, subjected to a side seal 17 to the film 2 including the crushed portion 18.
[0018]
After the side seal 17 is applied, as shown in FIG. 2 (C), the pair of left and right side seal bars 9a, 9b are separated from each other left and right and rise above the film 2 in FIG. 2 (A). Returning to the original position shown, the hot knife 10 is moved downward between the pair of left and right side seal bars 9a, 9b, and a cut line 19 is applied to the center in the width of the side seal 17.
[0019]
A continuous bag of a single bag 15 is manufactured as shown in FIG. 3 by applying the side seal 17 and the cut line 19 at a required interval on the film 2 unwound from the film 1 with a synthetic resin chuck. .
[0020]
Therefore, in the present invention, the side seal 17 is applied by a pair of left and right side seal bars 9a and 9b that move left and right X so as to approach or separate from each other along the surface of the film 2 and move Y up and down. Since 19 is applied by moving downward between the pair of left and right side seal bars 9a, 9b, it is always applied reliably to the center in the width of the side seal 17. Therefore, it is not necessary to set a wide side seal width in consideration of a movement error or the like, and a desired arbitrary width can be set.
[0021]
As described above, when the edge 10a is a straight cutting edge, the cutting line 19 is formed by a not-shown cutting line streak, but when the edge 10a is an uneven cutting edge, as illustrated in FIG. 3 and FIG. A cut line 19 is formed in the fusing perforation, which can also be selected as required.
[0022]
Further, since the side seal 17 by the pair of left and right side seal bars 9a and 9b and the cut line 19 by the hot knife 10 are performed at the same position, the work line of the bag making apparatus is shortened, and the cut line 19 is always set to the width of the side seal 17. It is possible to secure the accuracy of the position of the cut line 19 that is reliably applied to the inner center and shorten the working time of both the side seal 17 and the cut line 19.
[0023]
In the above-described embodiment, the synthetic resin continuous bag provided with the chuck 16 has been described. However, the present invention can be applied to a synthetic resin continuous bag not provided with the chuck 16.
[0024]
【The invention's effect】
As described above, according to the present invention, when the cut line is attached to the side seal of the synthetic resin continuous bag, the work line of the bag making apparatus is shortened, the installation space of the bag making apparatus can be reduced, and the cut line is always connected to the side. The center of the seal is reliably and accurately applied to the center of the seal, and the width of the side seal can be set to any width from wide to narrow as necessary, reducing the time required for processing the side seal and the cut line. This has the advantage that the production efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of the main part of the apparatus of the present invention. FIG. 2 is a cross-sectional view for explaining the operation of a cutting line attaching apparatus. FIG. 3 is a front view of a synthetic resin continuous bag produced by the method and apparatus of the present invention. 3 is an enlarged view of the main part of FIG. 3. FIG. 5 is a sectional view taken along line DD of FIG.
DESCRIPTION OF SYMBOLS 1 Film raw fabric with a synthetic resin chuck | zipper 2 Film 4 1st feed roll 5 Point seal bar 6 Cut line attachment apparatus 7 Stand 8 Endless belt 9a Side seal bar 9b Side seal bar 10 Hot knife 10a Edge 11 2nd feed roll 16 Chuck 17 Side seal 18 Crushing part 19 Cut line

Claims (4)

In the process of manufacturing a continuous bag body by providing cut lines at places where side-sealed at a predetermined interval on a folded synthetic resin film, the films are moved close to each other along the film surface that is intermittently transferred and stopped on the cradle. Alternatively, a pair of left and right side seal bars that move left and right to move apart and move up and down are moved closer to each other and moved to the film surface to perform side sealing, and after the side seal, the pair of left and right side seal bars are moved. A cutting line is attached to the center in the width of the side seal by a hot knife that moves up and away from the film surface and moves up and down between the pair of left and right side seal bars. A method for attaching a cut line to a continuous bag of synthetic resin.   The method for providing a cut line for a synthetic resin continuous bag according to claim 1, wherein the cut line is a perforation. In an apparatus for manufacturing a continuous bag body by providing a cut line at a place where side sealing is performed at a predetermined interval on a folded synthetic resin film, on the film surface on the film that is intermittently transferred and stopped on a cradle. A pair of left and right side seal bars that move left and right so as to approach or separate from each other and move up and down, and after moving the side seal bars toward each other and moving to the film surface, A synthetic resin comprising: a hot knife that moves up and down between the pair of left and right side seal bars that are moved upward from the film surface and that is provided with a tear line at the center in the width of the side seal Equipment for installing continuous bag cut lines.   The apparatus for attaching a cut line for a synthetic resin continuous bag according to claim 3, wherein the hot knife is provided with an uneven cutting edge so as to make a perforation.

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