JP2917119B2 - Anti-wrinkle device for vertical bag making and filling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-wrinkle device for preventing the occurrence of wrinkles in a seal portion when a horizontal seal is applied to a tubular film in a vertical bag making and filling machine. It is.

[0002]

2. Description of the Related Art In a vertical bag making and filling machine which obtains a package by horizontally sealing and cutting the upper and lower positions of an object to be packaged which is dropped and supplied to a cylindrical film, a horizontal seal is applied to the cylindrical film. As a device for preventing the generation of wrinkles in the seal portion, for example, Japanese Utility Model Publication No. 2-35222 and Japanese Utility Model Publication No. Sho 63
A technique described in JP-A-13125 has been proposed. The wrinkle prevention devices according to these proposals both open a pair of wrinkle-removing pieces provided at the lower end of the article-filled cylinder, thereby expanding the tubular film flat from the inside, and in this state, By applying a horizontal seal, it is configured to suppress generation of wrinkles.

[0003]

The anti-wrinkle device according to the prior art described above is relatively effective for packaging snacks and other bulk materials, and is capable of suppressing the generation of wrinkles and providing a beautiful horizontal seal. Can be. In other words, when sealing the cylindrical film, when the film is narrowed down by the pair of horizontal sealers, the volume of the article near the narrowed portion easily changes, and a large tension is not applied to the seal portion, thereby suppressing the generation of wrinkles. We were able to. However, when wrapping a block-shaped article corresponding to the size of the tubular film, when the film is squeezed by a pair of horizontal sealers, the article volume near the narrowed portion does not change. As a result, the tubular film was narrowed down from the upper end, and a large tension was applied to the seal portion, and it was not possible to prevent the occurrence of wrinkles satisfactorily.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems inherent in a conventional vertical bag making and filling machine, and has been proposed in order to suitably solve the problem. It is an object of the present invention to provide a wrinkle prevention device capable of preventing wrinkles from occurring at the time of horizontal sealing, even when packaging a package.

[0005]

To solve the above problems BRIEF SUMMARY OF THE INVENTION, because the present invention suitably achieve the intended purpose, feeding of the tubular film being fed downward along the outer periphery of the product fill tube A vertical bag-making and filling machine comprising a pair of horizontal sealers that move oppositely across a feeding path, and performs horizontal sealing at upper and lower positions sandwiching the packaged object dropped and supplied into the tubular film; provided at the lower end of the filling tube when said pair of lateral sealers are closed moves to performing a transverse seal in the tubular film, the
The cylindrical film is narrowed by the horizontal sealer
A skirt member that holds the cylindrical film in an extended state from the inside at the curved portion by deforming in the closing direction of the horizontal sealer as the shape film deforms, and a skirt member positioned above the horizontal sealer. , A pair of swing levers respectively arranged on both sides of the feeding path of the tubular film and swinging in the direction of the opposing movement of the horizontal sealer, and arranged between the pair of swing levers so as to approach and separate from each other. Equipped with a pair of movable film holding members,
The film sandwiching member allows air to pass through the cylindrical film in the closing direction of the sealer just above the engagement position of the horizontal sealer.
A film holding means for opposingly moving between a film holding position in which the film is held flat with a small gap and a retreating position separated from the feeding path, and a film holding means provided below the horizontal sealer , Packed facing each other across the feed path
A holding part set to a size that can hold an object over almost the entire length
Holding the packaged articles from the outer side of the tubular film by wood,
An article lifting means for lifting the packaged object together with the cylindrical film by a required amount, and before the pair of horizontal sealers come into contact with the cylindrical film, hold the pair of film holding members in the film holding means on the film; The tubular film is sandwiched in a flat shape facing the position, and the article to be packaged and the tubular film are moved horizontally by the article lifting means.
The seal position by narrowing down the cylindrical film with a roller.
About the same as the displacement of the cylindrical film below
Faces above the horizontal sealer after meshing
Lift by the amount that the tension of the tubular film does not become zero
In this state, a horizontal seal is applied to the tubular film in a state where the tubular film is placed .

[0006]

After the cylindrical film filled with the article to be packaged is fed downward by a predetermined feed amount, before the pair of horizontal sealers abut on the cylindrical film, the pair of film holding members are brought close to each other. Move. The sandwiching member sandwiches the tubular film located immediately above the horizontal sealer in a closing direction of the horizontal sealer with a slight gap through which air can pass. The article to be packed, which is filled in the tubular film facing the lower part of the horizontal sealer, is held from the outside of the film by the article lifting means, and the article to be packaged is lifted together with the tubular film by a required amount. Next, a skirt member located above the horizontal sealer is elastically deformed by the film-squeezing action when the horizontal sealer applies a horizontal seal to the cylindrical film, and the cylindrical film is held in an expanded state from the inside. Also, since the tubular film located below the horizontal sealer has been lifted upward in advance, no tension is applied to the seal portion by the narrowing action of the horizontal sealer, and as a result, the film has a beautiful and reliable horizontal seal without wrinkles. Is applied.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a wrinkle preventing device for a vertical bag making and filling machine according to the present invention will be described with reference to a preferred embodiment. As shown in FIG. 1, an unillustrated bag-making machine is concentrically arranged on an article filling cylinder 12 which is arranged upright on a machine frame 10 of a filling machine, and is unwound from a raw material roll (not shown) to form a bag-making machine. The fed film is formed into a cylindrical shape when passing through the bag making device, and is intermittently fed downward along the outer periphery of the article filling tube 12. The longitudinal edges of the cylindrical film F that overlap in the longitudinal direction are vertically sealed by a vertical sealer (not shown) during a film feeding suspension period after the film F is fed downward. In addition, a hopper (not shown) into which various kinds of articles 14 are charged is disposed above the article filling cylinder 12 extending to a position directly above the bag making machine. It is designed to be supplied at the timing of falling.

Below the article filling cylinder 12, a pair of fixed holders 16, 16 are disposed so as to be horizontally movable and opposed to each other with a feeding path for the cylindrical film F therebetween.
It is configured to be moved toward and away from each other by driving means (not shown) such as a motor. This fixing holder 16,
The horizontal sealers 18 and 18 are arranged opposite to each other on the opposing surface of the holder 16, and the holders 16 and 16 are moved in the closing direction close to each other,
At the upper and lower positions sandwiching the article 14 to be supplied to the cylindrical film F, the film F is sandwiched by the two lateral sealers 18 to perform horizontal sealing (see FIG. 10).
In addition, a cutter (not shown) is provided on one of the horizontal sealers 18, and the cutting of the film F is achieved at the same time when the cylindrical film F is pressed by the sealers 18, 18.

At the lower end of the article filling cylinder 12, when the horizontal sealers 18, 18 are moved in the closing direction to apply a horizontal seal to the cylindrical film F, the cylindrical film F is sealed by the sealers 18, 18. A skirt member 20 that elastically deforms as the tubular film F is deformed by the drawing-down action and extends and holds the tubular film F from inside is detachably provided via an attachment member 80. This mounting member 80
As shown in FIGS. 2 and 3, a pair of L-shaped engagement grooves 80 a, which are formed in a cylindrical shape that can be externally fitted to the article filling cylinder 12 and that are formed at positions spaced apart in the circumferential direction of the mounting member 80, are provided. 80
a (only one shown) is attached by engaging pins 81, 81 projecting from the corresponding outer surface of the article filling cylinder 12. A step portion 80b whose outer diameter is set to be small is formed at a lower portion of the mounting member 80, and the cylindrical portion 20a of the skirt member 20 is fitted to the step portion 80b. That is, the skirt member 20 is connected to the cylindrical portion 2.
0a and the horizontal sealer 18,
A pair of deformed portions 20b, 20b vertically suspended at positions opposed to the opposing movement direction of 18, and curved portions 20c, 20c connected to lower ends of both deformed portions 20b, 20b and curved in the opposed direction.
It is composed of The skirt member 20 may be entirely formed of a material that is elastically deformable, or only the deformed portions 20b and 20b may be formed of a material that is elastically deformable.

The curved portions 20c, 2 of the skirt member 20
Reference numeral 0c denotes a state in which the horizontal sealers 18 and 18 are attached to the article filling cylinder 12 via the attachment member 80, as shown in FIG.
Hanging right above the meshing position. When the pair of horizontal sealers 18, 18 are closed, the two deformed portions 20b, 20b of the skirt member 20 are elastically deformed in the closing direction (Y direction) of the horizontal sealers 18, 18, thereby forming the cylinder. The film F is held in a stretched state from the inside by both curved portions 20c, 20c (see FIG. 10). Further, since the curved portions 20c, 20c of the skirt member 20 extend to near the positions where the horizontal sealers 18, 18 are provided, they also have a function of surroundingly guiding the article 14 to the horizontal sealing position. In addition,
The inner diameter of the curved portion 20c of the skirt member 20 is set to be equal to or larger than the inner diameter of the article filling cylinder 12 and equal to or smaller than the outer diameter of the article filling cylinder 12, so that the packaged object 14 falling inside the filling cylinder 12 can be smoothly moved. The cylindrical film F fed along the outer periphery of the dropping and filling tube 12 can be smoothly fed. Each of the deformed portions 20b and the deformed portions 20c
As shown in FIG. 3, the corresponding portions of the cylindrical portion 20a and the curved portion 20c which face up and down are formed in a flat plate shape that does not bend, so that the elastic deformation of the deformable portion 20c is achieved.

[0011] Above the horizontal sealers 18, 18, FIG.
As shown in the figure, the X direction sandwiching the feeding path of the cylindrical film F
(In the direction intersecting the opposing movement direction of the horizontal sealers 18, 18) On both sides, holding members 22, 22 fixed to the machine frame 10 extend, and a cylindrical film is provided between both holding members 22, 22. A film holding device (film holding means) 24 for holding the portion immediately above the horizontal sealing position in F is provided. That is, the holding members 22, 22 are provided with side frames 26, 26 facing each other across the feeding path of the tubular film F. Each side frame 26 has a line passing through the center of the feeding path. In the Y direction (the direction in which the horizontal sealers 18, 18 face each other)
And a pair of pivot shafts 28, 28 are rotatably supported respectively. One end of a swing lever 30 is disposed on each pivot shaft 28 so as to rotate integrally therewith, and a film holding member is provided between the free ends of a pair of swing levers 28 facing each other in the X direction. 32 are installed. The length of the film holding member 32 in the X direction is set to be longer than the width of the tubular film F.

The pivot shafts 28, 28 provided on the one side frame 26 have gears at the ends extending outward from the frame 26 (the side opposite to the feeding path of the cylindrical film F). 3
4, 36 are arranged, and both gears 34, 36 are meshed. Also, an air cylinder 38 is attached to the side frame 26.
Is arranged, and a rack 40 arranged on the piston rod 38a of the cylinder 38 is configured to mesh with the one gear 36. Therefore, if the air cylinder 38 is biased forward and backward, the rack 40 and the gear 36 and both gears 3
Under the interlocking action of 4, 36, the swinging levers 30, 30 located on both sides of the feeding path of the cylindrical film F are mounted on the horizontal sealer 18,
18 swings at the required center angle in the opposing movement direction. As a result, the pair of film holding members 32, 32
A film holding position (FIG. 8) where the cylindrical film F is held flat with a slight gap in the closing direction of the sealers 18 and 18 directly above the engagement positions of the seals 8 and 18 and separated from the feeding path. To the evacuation position (FIG. 6). The two film holding members 32, 32 are set so as to hold the film F flat before the horizontal sealers 18, 18 contact the cylindrical film F when the horizontal seal is applied to the cylindrical film F. I have.

A pair of film holding members 32, 32
As shown in FIG. 1, the swing levers 30, 30 hang down in an inverted C-shape at a retracted position where the swing levers 30, 30 are held horizontally, and the swing levers 30, 30 swing downward from this position. The film holding members 32, 32 move on an arc-shaped locus to reach the film holding position. The pair of film holding members 32, 32 are configured to hold the tubular film F at the lowest point thereof and to make the film F flat just above the horizontal sealing position. . In the state where the film holding members 32, 32 face the film holding position, the horizontal sealer 18,
18 and the fixed holders 16 and 16 are set so as not to interfere with each other.

Below the horizontal sealers 18, 18, FIG.
As shown in the figure, the packaged object 14 filled in the tubular film F
Lifting device (product lifting means) 4 for holding the film from the outside of the film F and lifting it upward by a required amount during horizontal sealing
2 are provided. The article lifting device 42 includes a pair of vertically spaced plates 44,
44, a pair of guide shafts 4 separated in the Y direction
6, 46 are arranged in parallel, and the guide shafts 46, 4
A slide frame 48 is arranged between the six to be able to move up and down. As shown in FIG. 5, a bracket 50 is provided at one end in the Y direction on a side surface of the slide frame 48 that faces the feeding path of the tubular film F, and a first holding cylinder 52 is provided on the bracket 50. You. A first mounting plate 54 is fixed to the piston rod 52a of the first holding cylinder 52, and a guide rod 56 protruding from the mounting plate 54 is provided.
Are slidably inserted into guides 58 provided on the bracket 50. The cylindrical film F of the first mounting plate 54
A holding member 60 set to a size capable of holding the packaged object 14 to be filled in the tubular film F over substantially the entire length is disposed on a side surface facing the feeding path. Then, by urging the first holding cylinder 52 forward and backward, the holding member 60 disposed on the first mounting plate 54 moves toward and away from the feed path.

A bracket 62 is disposed substantially at the center of the side of the slide frame 48 that faces the feed path.
A second holding cylinder 64 is disposed on the bracket 62 in the same direction as the first holding cylinder 52. A second mounting plate 70 is slidably disposed on a guide rod 68 provided between a bracket 62 on which the second holding cylinder 64 is disposed and a bracket 66 disposed on the other end of the slide frame 48 in the Y direction. And the second mounting plate 7
The piston rod 64a of the second holding cylinder 64 is fixed to 0. A holding member 72 is set on the side of the second mounting plate 70 facing the feeding path of the cylindrical film F so as to be capable of holding the article 14 to be filled in the cylindrical film F over substantially the entire length. Are arranged. By urging the second holding cylinder 64 forward and backward, the second mounting plate 7
The holding member 72 disposed at 0 moves toward and away from the feed path.

That is, the holding member 60 moved by the first holding cylinder 52 and the holding member 72 moved by the second holding cylinder 64 are opposed to each other in the Y direction across the feeding path of the cylindrical film F. And a pair of holding cylinders 52,
64, the pair of holding members 60 and 72 are moved from the outside of the cylindrical film F to the packaged object 1
4 is moved between a holding position (FIG. 10) for holding the sheet 4 and a retracted position (FIG. 6) separated from the feeding path.
Note that the holding members 60 and 72 are formed of a material having a buffering function such as a sponge, and also function as means for discharging the air inside the tubular film F when holding the packaged object 14. Has become. Also, the holding members 60, 7
The two opposing surfaces are formed in a shape that follows the outer shape of the article 14 so that the article 14 can be stably held.

Between the slide frame 48 and the lower plate 44, as shown in FIG.
An elevating device 78 as a lifting amount variable means that connects the fourth and second elevating cylinders 76 on the bottom side is provided.
That is, the piston rod 74 a of the lifting device 78 that is directed above the first lifting cylinder 74 is mounted on the slide frame 4.
8, a piston rod 76a pointing downward from the second lifting cylinder 76 is connected to the lower plate 44. The stroke amounts of the two cylinders 74 and 76 are set so as to be different from each other.
Reference numeral 8 denotes a first elevating position in which both the cylinders 74 and 76 of the elevating device 78 are not energized, a second elevating position in which only the first elevating cylinder 74 is energized, and a third position in which only the second elevating cylinder 76 is energized. It is configured to be positioned at the elevating position and the fourth elevating position where both of the cylinders 74 and 76 are urged.

The slide frame 48 is moved up and down
The reason is that when the horizontal sealers 18, 18 apply a horizontal seal to the tubular film F, the two sealers 1
The tubular film F is narrowed down by the movement of 8, 18 in the closing direction, and at this time, the tubular film F below the sealing position is displaced upward. Then, since the tension is applied to the seal portion by this displacement, the cylindrical film F is lifted up by an amount substantially equal to the above-mentioned displacement in advance so as not to apply the tension. The amount of displacement is determined by the size of the article 14 to be filled in the tubular film F.
As described above, the lifting device 78 of the embodiment is set so that the lifting amount (first lifting position to fourth lifting position) corresponding to a plurality of types (four types in the embodiment) can be switched. I have. The lifting amount is set so that the tension of the cylindrical film F facing above the sealers 18 and 18 does not become zero after the engagement of the horizontal sealers 18 and 18.

[0019]

Next, the operation of the above-described embodiment of the vertical bag making and filling machine according to the present invention will be described with reference to the case of filling a tubular film with a block-shaped package.

As shown in FIGS. 6 and 7, the pair of film holding members 32, 32 and the pair of horizontal sealers 18, 1 are provided.
Numeral 8 stands by in a state of being separated from each other and allowing the passage of the cylindrical film F. Further, the pair of holding members 60 and 72 of the article lifting device 42 are also separated from each other and are in a state of allowing passage of the tubular film F.

In this state, at the required timing when the block-shaped packaged object 14 is filled through the article filling tube 12 into the cylindrical film F having a horizontal seal at the lower end,
After the tubular film F is intermittently fed downward by one packaging length,
The air cylinder 38 is urged in a required direction and the rack 4
As shown in FIG. 8, the swing levers 30 and 30 are engaged with each other under the action of meshing the gear 0 and the gear 36 and the gear 34 and the gear 36.
It swings in a direction to move the pair of film holding members 32, 32 from the retracted position to the film holding position close to each other. As a result, the cylindrical film F is narrowed down flatly from both sides by the pair of film holding members 32, 32 and held (see FIG. 9). At this time, the film holding member 3
The tubular film F sandwiched by the pins 2 and 32 is sandwiched with a small gap allowing the passage of air. The wrapping material 14 is dropped and supplied to the tubular film F in a state where the change in the posture is suppressed by the skirt member 20 disposed at the lower end of the article filling tube 12.

Here, when the swing levers 30, 30 swing, the pair of film sandwiching members 32, 32 move on an arc-shaped locus, and sandwich the tubular film F at the lowest point thereof. It will be. Thereby, the cylindrical film F
Can be made flat just above the horizontal sealing position. Since the film holding members 32, 32 face the film holding positions adjacent to each other, the next falling and supplied packaged object 14 is prevented from falling to the horizontal sealing position, and the packaged product at the seal portion is prevented. 14 is prevented from biting.

The holding cylinders 52, 64 of the article lifting device 42 are synchronously urged to move the holding members 60, 72 facing each other across the feeding path of the tubular film F toward each other. Thus, the article to be packaged 14 is held from outside the tubular film F. Next, the two lifting cylinders 74 and 76 of the lifting device 78 are selectively energized and controlled in accordance with the type of the article 14 to be packaged, and as shown in FIG.
0,72 is raised by the required amount. The holding member 60,
When holding the packaged object 14 by 72, the air in the tubular film F escapes upward from the portion sandwiched by the film sandwiching members 32,32. This air escape
Since it acts to expand (expand) the tubular film F, it can be expected to prevent the occurrence of wrinkles at the time of horizontal sealing by the horizontal sealers 18 and 18 thereafter.

Next, as shown in FIGS. 10 and 11, the horizontal sealers 18, 18 move close to each other, and pinch the portion of the cylindrical film F directly below the portion pinched by the film pinching members 32, 32. Press. At this time, the cylindrical film F is narrowed down, but since the cylindrical film F facing below the horizontal sealers 18, 18 has been lifted by the same amount of displacement in advance by the holding members 60, 72, the cylindrical film F No tension is applied to the horizontal seal portion, and a beautiful horizontal seal without wrinkles is applied. In addition, both deformed portions 20b of the skirt member 20 located above the horizontal sealing position,
As shown in FIGS. 12 (a) and (b), the cylindrical film F is elastically deformed as the horizontal sealers 18 and 18 squeeze the cylindrical film F, whereby the cylindrical films F are bent by the curved portions 20c and 20c. Since F is held in an extended state from the inside of the opposing movement direction of the horizontal sealers 18, 18, the generation of wrinkles is also effectively prevented.

Although the embodiment has been described with reference to the case of filling a block-shaped object to be packed, it is needless to say that wrinkles can be effectively prevented even when a bulk object is filled. Further, the lifting amount variable means is not limited to a structure in which two cylinders are connected on the bottom side as in the embodiment, but may be a single cylinder having a variable stroke amount, a pinion and a rack rotated by a motor. A combination of
Alternatively, a configuration in which a ball screw is rotated by a motor or the like can be appropriately adopted. Further, instead of moving the pair of holding members in the article lifting device toward and away from each other by two cylinders, the pair of holding members may be moved to and away from each other by one cylinder. Further, in the embodiment, the holding member of the article lifting device is configured to perform the air bleeding in the embodiment, so that the holding member is set to hold the entire length of the packaged object. The configuration may be such that each of the packages is separately held, or only the lowermost package is held from the side or from below and lifted.

[0026]

As described above, according to the apparatus for preventing wrinkles of a vertical bag making and filling machine according to the present invention, the tubular film facing above the horizontal sealing position is held in a stretched state from inside. Because the horizontal sealer meshes and a horizontal seal is applied,
The generation of wrinkles during the sealing can be favorably prevented. In addition, the horizontal seal can be applied in a state where the cylindrical film facing the horizontal seal position is lifted by a required amount so that no downward tension is applied when narrowing by the horizontal sealer. The generation of wrinkles due to the film tension from the upper end portion of the packaged object located below to the meshing position of the sealer is effectively prevented.

Further, a change in the posture of the packaged object when the packaged product is dropped and supplied can be minimized by the skirt member disposed at the lower end of the article filling cylinder. Furthermore, at the position directly above the horizontal sealer, it is possible to prevent the package to be subsequently dropped and supplied by the film holding member from falling to the horizontal seal position. There are also advantages that can be prevented. Furthermore, the engagement of the horizontal sealer
A cylindrical film directly above the position
Flat with a small gap to allow more air to pass through
In the state of being sandwiched, the outside of the tubular film is
By holding the object to be packaged over almost the entire length,
Air in the film is pinched by the film pinching member
Escape from the part upward, this air escape
Acts to expand (extend) and generate wrinkles during horizontal sealing
The effect which can prevent is produced.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an anti-wrinkle device of a vertical bag making and filling machine according to an embodiment.

FIG. 2 is a front view showing an article filling cylinder and a skirt member according to the embodiment.

FIG. 3 is an exploded perspective view showing an article filling cylinder, a mounting member, and a skirt member according to the embodiment.

FIG. 4 is a schematic plan view showing a wrinkle prevention device according to the embodiment.

FIG. 5 is a schematic plan view showing the article lifting device according to the embodiment.

FIG. 6 is an explanatory front view showing the operation of the wrinkle prevention device according to the embodiment.

7 is an explanatory plan view of the wrinkle prevention device in the state shown in FIG.

FIG. 8 is an explanatory front view showing the operation of the wrinkle prevention device according to the embodiment.

9 is an explanatory plan view of the wrinkle prevention device in the state shown in FIG.

FIG. 10 is an explanatory front view showing the operation of the wrinkle prevention device according to the embodiment.

11 is an explanatory plan view of the wrinkle prevention device in the state shown in FIG.

FIG. 12 is an explanatory bottom view showing a state in which the skirt member according to the example is deformed as the tubular film is narrowed down.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Article filling cylinder 14 Article to be packed 18 Horizontal sealer 20 Skirt member 20b Deformation part 20c Curved part 24 Film sandwiching device (Film sandwiching means) 30 Swing lever 32 Film sandwiching member 42 Article lifting device (Art lifting device) 78 Lifting device ( (Variable lifting means)

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 9/00-9/24 B65B 51/00-51/32

Claims (3)

(57) [Claims] 1. A pair of horizontal sealers (18, 18) moving oppositely across a feeding path of a cylindrical film (F) fed downward along an outer periphery of an article filling tube (12), In a vertical bag making and filling machine configured to apply a horizontal seal at an upper and lower position sandwiching an article to be packaged (14) dropped and supplied into a cylindrical film (F), provided at a lower end of the article filling cylinder (12) When the pair of horizontal sealers (18, 18) move to close to apply a horizontal seal to the cylindrical film (F), the cylindrical fillers by the horizontal sealers (18, 18) are moved .
The tubular film (F) is deformed by the squeezing action of LUM (F)
As a result , the lateral sealer (18, 18) is deformed in the closing direction to thereby hold the tubular film (F) in a curved portion (20c, 20c) in a stretched manner from the inside. 20), and a tubular film (F) located above the horizontal sealer (18, 18).
Horizontal sealers (18, 18), which are respectively installed on both sides of the feed path of
A pair of swinging levers (30, 30) swinging in the opposing movement direction and a pair of film holding members (30, 30) disposed between the pair of swinging levers (30, 30) and movable toward and away from each other. 32,32)
This film holding member (32, 32) is attached to the horizontal sealer (1
(8, 18) A film holding position for holding the tubular film (F) in a flat shape with a small gap allowing air to pass therethrough in the closing direction of the sealer (18, 18) just above the meshing position. And film holding means (24) for opposingly moving between the retreat positions separated from the feeding path, and a tubular film provided below the horizontal sealer (18, 18).
The packaged object (14) faces the entire length of the package (14)
Holder (60, 72) set to dimensions that can be held over
More from the outer side of the tubular film (F) holding the articles to be packaged (14), the required amount only lifted from the article lifting means (42) with該被package (14) of the tubular film (F) Before the pair of horizontal sealers (18, 18) come into contact with the tubular film (F), the pair of film holding members (32, 32) in the film holding means (24) face the film holding position. While holding the tubular film (F) in a flat shape, the article to be packaged (14) and the tubular film (F) are lifted by the article lifting means (42).
To narrow down the tubular film (F) by the horizontal sealer (18, 18)
The cylindrical film (F) below the sealing position changes upward.
After the engagement of the lateral sealer (18, 18)
Tubular film (F) facing above the sealer (18, 18) at
Lift the cylinder by an amount that does not become zero.
An anti-wrinkle device for a vertical bag making and filling machine, characterized in that a horizontal seal is applied to the film-like film (F) . 2. The skirt member (20) hangs down from a lower end of the article filling cylinder (12) and the pair of horizontal sealers (18, 18).
A pair of deformed portions (20b, 20b) facing each other in the facing movement direction,
The horizontal sealer (18 , 1) is connected to the lower end of this deformed portion (20b, 20b).
8) a curved portion (20c, 20c) that hangs down to just above the meshing position and curves in the opposite direction, and the inner diameter of the curved portion (20c, 20c) is equal to or larger than the inner diameter of the article filling cylinder (12), And an article filling cylinder (1
The wrinkle preventing device for a vertical bag making and filling machine according to claim 1, wherein the outer diameter is set to be equal to or less than the outer diameter of (2). 3. The article lifting means (42) has different dimensions.
The cylindrical film (F) which differs for each kind of the packaged object (14 )
3. The wrinkle preventing device for a vertical bag making and filling machine according to claim 1, further comprising a lifting amount variable means (78) which is set to be switched to a lifting amount corresponding to the displacement amount of the vertical bag making and filling machine.