JP2008184210A - Vertical bag forming-filling-packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical bag forming-filling-packing machine which restrains the shift in a transverse direction of a belt-like film when shaping the belt-like film into a cylindrical form, the belt-like film having such articles as a zipper-tape or the like pasted thereto unevenly in the direction perpendicular to the transporting direction. <P>SOLUTION: The vertical bag forming-filling-packaging machine is so configured as to be equipped with a former 10 that forms the belt-like film 100 into a cylindrical form, the belt-like film 100 having articles unevenly pasted thereto in the direction perpendicular to the transporting direction. The former 10 folds back the belt-like film 100 conveyed in, in a vertical direction, and includes a guide section 11 that overlaps both the side rims of the belt-like film 100 for their guidance downward, and a cylindrical section 12 extending vertically downward, whose uppermost rim is continuously connected with the folding-back rim portion 15 of the guide section 11. The folding-back rim portion 15 of the guide section 11 has, at least on its central portion, a protrusion 17 projecting farther out than the folding-back rim portion 15, while the weight of the projected amount of the protrusion 17 is so set that a tension can be given to the belt-like film 100 enough for it not to shift in the circumferential direction of the cylindrical section 12 when the portions of the belt-like film to where the articles are pasted pass over the folding-back rim portion 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vertical bag making filling and packaging machine having a function of filling a product into the inside of a belt-like film continuously conveyed into a bag shape.

  2. Description of the Related Art Conventionally, some packaging bags formed by a vertical bag making filling and packaging machine have a fastener attached to an opening. For example, those disclosed in Patent Document 1 and Patent Document 2 are known as vertical bag-filling and packaging machines having a function of forming this type of packaging bag with a fastener.

  As shown in FIG. 12 of Patent Document 1 and FIG. 7 of Patent Document 2, this type of vertical bag-filling and packaging machine is provided with a step of attaching a fastener tape on the transport path of the belt-like film. The belt-like film to which the fastener tape is attached in this step is then fed into a molded body called a former, and both side edges are overlapped, and then the polymerized portion is heat-sealed to be formed into a cylindrical shape. The former has a folded edge that is formed into a tubular film while folding the conveyed belt-shaped film in a substantially vertical direction.

  Now, when the portion of the belt-like film to which the fastener tape T (article) is attached passes through the folded edge of the former, a stronger resistance is generated than when the portion to which the fastener tape T is not attached is passed. . In the configurations of Patent Document 1 and Patent Document 2, since the longitudinal seal portion where both side edges of the belt-shaped film are overlapped and heat-sealed is positioned at the approximate center of the packaging bag, the fastener tape T is attached to the approximate center of the strip-shaped film. It had been. For this reason, even when the portion of the belt-like film to which the fastener tape T is attached passes through the folded edge of the former, the resistance that occurs in the belt-like film is applied evenly, so that the belt-like film is not displaced.

However, in the case of a packaging bag in which the fastener tape T as shown in FIG. 7 is attached to the inner surface and the overlapping portions of both side edges of the strip film 100 are located on one side, the fastener tape T is the center of the strip film 100. It is attached to the area on one side of the line. Therefore, when the band-shaped film passes through the folded edge of the former, a stronger resistance is generated at the portion of the band-shaped film 100 where the fastener tape T is adhered than when the fastener tape T is not adhered. As shown in Fig. 4 (a), the belt-like film is shifted in the circumferential direction to the side where the fastener tape T is not adhered, and both side edges of the belt-like film are not overlapped, and the packaging bag may not be made. It was.
JP 2006-36286 A JP 2005-8231 A

  The present invention has been made in view of the above situation, and when forming a strip-like film in which articles are stuck unevenly in the conveyance orthogonal direction into a cylindrical shape, a predetermined tension is applied to the strip-like film that has been conveyed. The purpose is to suppress the lateral displacement (displacement in the circumferential direction of the cylindrical portion) of the belt-like film when the belt-like film portion to which the article is attached passes through the folded edge of the former by giving and tensioning.

In order to achieve the above object, the present invention provides a former in a vertical bag-filling and packaging machine provided with a former that forms a strip-like film in which articles are non-uniformly attached in the direction perpendicular to the conveyance direction into a cylindrical shape. It is characterized by comprising.
That is, the former folds the belt-shaped film that has been conveyed in the vertical direction, and overlaps both side edges of the belt-shaped film and guides them downward, and the upper end is connected to the folding edge of the guide section, A protruding portion projecting from the folded edge portion at least in the center portion, and the amount of protrusion of the projecting portion is defined as a band-shaped film. Even if the article adhering part of the article passes through the folded edge, the tension is set so that the belt-like film does not shift in the circumferential direction of the tubular part.

  According to such a configuration, since the belt-like film rides on the protruding portion at the folded edge, tension is applied to the belt-like film, and the belt-like film is strained. For this reason, the band-shaped film has no room for lateral displacement. As a result, the lateral displacement of the belt-like film can be suppressed even when there is a situation such as the fastener tape being stuck on one side of the center line of the belt-like film.

In addition, a protrusion adjustment member is provided that is assembled to the cylindrical portion of the former and is movable in the axial direction along the cylindrical portion. A protrusion is formed at the upper edge of the protrusion adjustment member, and the protrusion is a guide. It can also be set as the structure arrange | positioned along the folding | turning edge part of a part.
By comprising in this way, it becomes possible to adjust the protrusion amount of a protrusion part.

Further, the protrusion adjusting member is incorporated so as to be movable within a certain range in the axial direction along the cylindrical portion, and is further urged at all times in the direction in which the protruding portion protrudes from the folded edge by the urging means having elasticity. It can also be configured.
As a result, when excessive tension is applied to the belt-like film due to contact with the protrusion, the protrusion adjustment member moves against the urging force of the urging means to reduce the protrusion amount of the protrusion, thereby The tension acting on the film can be reduced.

  As described above, according to the present invention, when a strip film in which articles are stuck unevenly in the direction perpendicular to the transport is formed into a cylindrical shape, the transported strip film is tensioned by applying a predetermined tension. Thus, it is possible to suppress the lateral displacement of the belt-like film when the belt-like film portion to which the article is attached passes through the folded edge of the former.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 are views for explaining a vertical bag making filling and packaging machine according to an embodiment of the present invention, and FIG. 1 is a perspective view showing an overall configuration of the vertical bag making filling and packaging machine according to this embodiment. FIG.
As shown in FIG. 1, the vertical bag making and filling machine of this embodiment includes a reel 1, a funnel tube 2, a former 10, a feeding belt 3, a vertical sealer 4, and a horizontal sealer 5. Yes. Moreover, the packaging bag shape | molded in this embodiment has the fastener tape T stuck on the surrounding surface in the packaging bag 200, as shown in FIG.

  A belt-like film 100 is wound around a reel 1 of a vertical bag making filling and packaging machine. The belt-like film 100 is continuously fed from the reel 1 by a plurality of feeding rollers 6 and a conveying roller 7 and is conveyed to the former 10 via a film conveying path. A fastener attachment device 8 is disposed in the film conveyance path so as to face the belt-like film 100. The fastener attaching device 8 is configured to temporarily fix (stick) the fastener tape T (article) at regular intervals to one side of the center line of the belt-like film.

  The funnel tube 2 has an inverted conical hopper 9 connected to the upper portion thereof, and an auger shaft (not shown) having spiral blades is coaxially disposed in the hollow portion of the funnel tube 2. It is. The filling material to be filled in the packaging bag 200 is continuously supplied into the hopper 9 and transferred downward in the funnel tube 2 with the rotation of the auger shaft. It falls from 2a and is filled in the packaging bag 200.

The former 10 is provided so as to surround the upper outer peripheral surface of the funnel tube 2 in a non-contact manner. The former 10 has a function of forming the conveyed belt-like film 100 into a cylindrical shape and feeding it vertically downward along the outer periphery of the funnel tube. A specific configuration of the former 10 will be described later.
On the lower side of the former 10, there is provided a feeding belt 3 that conveys the strip-shaped film 100 formed into a cylindrical shape vertically downward.

FIG. 2 is a plan view schematically showing the installation position of the vertical sealer of the vertical bag making filling and packaging machine according to the present embodiment.
As shown in FIG. 1 and FIG. 2, the vertical sealer 4 is provided at the lower position of the former 10 along the outer periphery of the funnel tube 2. One vertical sealer 4 (vertical sealer on the right side in FIG. 2) vertically seals the overlapping portion 103 of the strip film 100, and the other vertical sealer 4 (vertical sealer on the left side in FIG. 2) The folding part 104 in the position opposite to the overlapping part 103 is vertically sealed.

  Returning to FIG. 1, the horizontal sealer 5 has a heater block that reciprocates in the horizontal direction, and is installed on the lower side of the funnel tube 2. A cutting blade 5 a is provided inside the horizontal sealer 5. The horizontal sealer 5 is configured to heat-seal the transported cylindrical belt-shaped film 100 in the width direction and further cut in the width direction by a cutting blade 5a.

  Further, a fastener fusion heater 5 b for attaching a fastener tape T to the belt-like film 100 is provided below the horizontal sealer 5. The fastener tape T temporarily fixed to the belt-like film 100 by the fastener attaching device 8 is pressed from both sides by the fastener fusion heater 5b and heat sealed to the inner surface of the packaging bag 200.

FIG. 3 is a view showing a former of the vertical bag making filling and packaging machine according to the present embodiment, wherein (a) is a top view, (b) is a front view, (c) is a side view, and (d) is a portion A. FIG.
As shown in the figure, the former 10 according to the present embodiment has a guide part 11 that guides the belt-like film 100 that is conveyed by folding it down vertically, and an upper end that is connected to the folded edge of the guide part 11. And a cylindrical portion 12 that forms the belt-like film 100 into a cylindrical shape and conveys it downward.

  The guide portion 11 of the former 10 includes a back guide 13 formed on a flat surface and inclined, and a side guide 14 formed on the curved surface from the back guide 13. The back guide 13 is formed on a substantially triangular flat surface, the bottom of which corresponds to the width of the belt-like film 100, and the top is in a position where it is connected to the tubular portion 12. The side guide 14 is formed with a curved surface so as to go around the cylindrical portion 12 starting from the side of the back guide 13.

  The upper end of the cylindrical part 12 is connected to the guide part 11. A portion where the cylindrical portion 12 is connected is a folded edge 15 of the guide portion 11. And the cylindrical part 12 hangs down so that the outer periphery of the funnel tube 2 may be enclosed from an upper end.

  The belt-like film 100 that has been transported to the former 10 is transported along the back guide 13. On the other hand, both end portions 101, 102 of the belt-like film 100 immediately enter the region of the side guide 14, and wrap around the side guide 14 while drawing an arc-shaped trajectory according to the curved surface of the side guide 14. As a result, the belt-like film 100 is folded in the vertically downward direction at the folded edge 15 between the guide portion 11 and the tubular portion 13 and formed into a tubular shape. And it is conveyed below along the outer peripheral surface of the funnel tube 2.

  Further, the cylindrical portion 12 has a notch 16 formed at a position opposite to the conveyance path along which the belt-shaped film 100 has been conveyed, and both end portions 101 and 102 of the belt-shaped film 100 formed into a cylindrical shape are formed on the cylindrical portion 12. It is exposed to the outside of the tubular portion 12 through the notch 16 and guided to the vertical sealer 4.

FIG. 4 is a cross-sectional view schematically showing a belt-like film formed into a cylindrical shape in a vertical bag-filling and packaging machine, where (a) is a diagram of a conventional former, and (b) is a former of the present embodiment. FIG.
Here, in the conventional former, the folded edge 15 between the guide portion 11 and the tubular portion 12 is smoothly cut so that the belt-shaped film 100 is smoothly folded, and the belt-shaped film being conveyed. 100 was folded into a cylindrical shape as it was. However, when the fastener tape T is attached to one side of the belt-like film 100, the fastener tape T has resistance to folding of the belt-like film 100 when the fastener tape T passes through the folded edge 15. As shown in FIG. 4A, the belt-like film 100 may be shifted to the side having the lower resistance (the side without the fastener tape) as shown in FIG. 4A.

  Therefore, in the former 10 of the present embodiment, as shown in FIGS. 3C and 3D, the central portion of the folded edge 15 between the guide portion 11 and the cylindrical portion 12, that is, the top portion of the back guide 13. And the protrusion part 17 which protruded upwards is formed in the periphery site | part. The protruding amount D of the protruding portion 17 is adjusted so that the portion where the fastener tape T is attached to the belt-like film 100 is tensioned by applying a tension that does not laterally shift even when passing through the folded edge 15.

  In addition, the surface of the protrusion part 17 is processed into the smooth curved surface so that the strip | belt-shaped film 100 may not be damaged.

Further, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be configured with various modifications and application examples.
For example, the packaging bag 200 to be bag-made is not limited to the one with a fastener, and when the belt-like film 100 to which articles such as a check valve and an oxygen scavenger are affixed unevenly is made. But it is applicable.
Further, the protruding portion 17 may be formed not only in the central portion of the folded edge 15 but also to extend over an arbitrary length along the folded edge 15.

[Modification 1]
FIG. 5 is a view showing a former of a vertical bag-filling and packaging machine showing a modification of the present invention, in which (a) is a side view and (b) is a rear view.
As shown in FIG. 5, in the former 10 according to this modification, a protrusion adjusting member 18 that is slidable in the axial direction along the cylindrical portion 12 is assembled on the inner peripheral surface of the cylindrical portion 12. The protrusion adjusting member 18 is fastened to a long hole 12a provided in the cylindrical portion 12 with a mounting screw 18a, and an axial direction along the cylindrical portion 12 along the long hole 12a by loosening the mounting screw 18a. The fixed position can be moved and adjusted.
A protrusion 17 is formed on the upper edge of the protrusion adjusting member 18. That is, the upper end edge of the protrusion adjusting member 18 is disposed along the folded edge 15 between the guide portion 11 and the tubular portion 12, and moves from the folded edge 15 with the axial movement along the tubular portion 12. The protrusion amount D can be arbitrarily adjusted.
Therefore, by adjusting the movement of the protrusion adjusting member 18, the magnitude of the tension applied to the strip film 100 can be arbitrarily adjusted, and it becomes possible to flexibly cope with the difference in thickness and strength of the supplied strip film. .

[Modification 2]
FIG. 6 is a view showing a former of a vertical bag-filling and packaging machine showing another modification of the present invention, wherein (a) is a side view and (b) is a rear view.
As shown in FIG. 6, the former 10 according to this modification includes a protrusion adjusting member 18 that is incorporated in the inner peripheral surface of the cylindrical portion 12 so as to be movable in the axial direction along the cylindrical portion 12. The movement range of the protrusion adjusting member 18 is restricted by the stopper pin 18a and the long hole 12a provided in the cylindrical portion 12, and the protrusion adjusting member 18 is moved by an elastic biasing spring (biasing means) 19. It is set as the structure always urged | biased in the protrusion direction.
The protrusion 17 formed on the upper end edge of the protrusion adjusting member 18 protrudes from the folded edge 15 between the guide portion 11 and the tubular portion 12 with the urging force of the urging spring 19. However, when excessive tension is applied to the belt-shaped film 100 that contacts the protrusion 17, the protrusion adjustment member 18 moves in the retracting direction against the urging force of the urging spring 19, and the protrusion amount of the protrusion 17 By reducing the tension, the tension acting on the belt-like film 100 can be reduced.
Thereby, it can prevent that the strip | belt-shaped film 100 is damaged by the excessive tension effect | action.

It is a perspective view which shows the whole structure of the vertical bag making filling packaging machine which concerns on this embodiment. It is a top view which shows typically the installation position of the vertical sealer of the vertical bag making filling packaging machine which concerns on this embodiment. It is a figure which shows the former | foamer of the vertical bag making filling packaging machine which concerns on this embodiment, (a) is a top view, (b) is a front view, (c) is a side view, (d) is an enlarged view of A part. is there. It is sectional drawing which showed typically the strip | belt-shaped film shape | molded in the cylindrical shape in the vertical bag making filling packaging machine, (a) is a figure by the conventional former, (b) is a figure by the former of this embodiment. It is a figure which shows the former | foamer of the vertical bag making filling packaging machine which shows the modification of this invention, (a) is a side view, (b) is a rear view. It is a figure which shows the former | foamer of the vertical bag making filling packaging machine which shows the other modification of this invention, (a) is a side view, (b) is a rear view. It is a perspective view which shows the four-way seal packaging bag with a fastener.

Explanation of symbols

1: reel, 2: funnel tube, 3: feeding belt, 4: vertical sealer, 5: horizontal sealer, 6: feeding roller, 7: conveying roller, 8: fastener mounting device, 9: hopper,
10: Former, 11: Guide part, 12: Cylindrical part, 13: Back guide, 14: Side guide, 15: Folded edge part, 16: Notch part, 17: Projection part, 18: Projection adjustment member, 19: Attachment Spring,
100: belt-like film, 101, 102: side edge part, 103: overlapping part, 104: folding part 200: packaging bag D: protrusion amount, T: fastener tape

Claims (3)

In a vertical bag making filling and packaging machine equipped with a former that forms a strip-like film in which articles are stuck unevenly in the direction perpendicular to the conveyance into a cylindrical shape,
The former is
A guide portion that folds the strip-shaped film that has been conveyed in the vertical direction and that guides the stack on both side edges of the strip-shaped film downward,
The upper end is connected to the folded edge of the guide portion, and includes a cylindrical portion extending vertically downward,
The folded edge of the guide part is provided with a protruding part protruding from the folded edge at least in the center part,
And even if the article sticking part of the said strip | belt-shaped film passes the said folding | returning edge part, even if the said strip | belt-shaped film does not shift | deviate the tension | tensile_strength in the circumferential direction of the said cylindrical part. A vertical bag making filling and packaging machine, characterized in that it is set to an amount to be given to the bag. A protrusion adjustment member that is assembled to the cylindrical portion of the former and is movable in the axial direction along the cylindrical portion. The protrusion is formed on an upper end edge of the protrusion adjustment member, and the protrusion is 2. The vertical bag making filling and packaging machine according to claim 1, wherein the vertical bag making filling and packaging machine is disposed along a folded edge of the guide portion. The protrusion adjusting member is incorporated in the axial direction along the cylindrical portion so as to be movable within a certain range, and the protruding portion protrudes from the folded edge portion by an elastic biasing means. The vertical bag making filling and packaging machine according to claim 2, wherein the vertical bag making and packaging machine is always urged to the bag.

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