JPH08119210A - Method and apparatus for making gusseted bag and packaging - Google Patents

Abstract

PURPOSE: To reduce frequency for replacing material rolls during packaging to improve workability and productivity by using the material roll with a flat- folded film wound and gusseting the film to transfer to a packaging apparatus. CONSTITUTION: A dancer roller 29 is put on a path of a flat-folded tubelike film 30 between a gusset forming part for feeding out the film 30 from a material roll with the film wound and folding a gusset while continuously feeding the film to a gusset folding device and a bag making part 28 for receiving the gusset-folded film and making individual gusseted bags G while intermittently feeding the film, wherein the continuously operated gusset forming part and the intermittently operated bag making part are interlocked without failure. The gusseted bags G are transferred one by one to an intermittently rotating table-type automatic packaging apparatus 26, where a packaging process is done wherein objects to be filled are put, a mouth is sealed and so on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes a flat-folded tube-shaped film into a gusset bag, and then sends this gusset bag to an intermittent rotary table type automatic packaging device to open and cover the gusset bag. TECHNICAL FIELD The present invention relates to a gusset bag making and packaging method for sequentially performing steps such as filling, sealing and discharging of a package, and a gusset bag making and packaging machine for carrying out the method.

[0002]

2. Description of the Related Art Bags with both sides folded (gusset bags)
And a gusset bag for supplying the gusset bag to the gusset bag, in which the gusset bag is opened, the packaged object is filled, the mouth seal is sealed, and the like. A combination of bag making machines is disclosed in JP-A-6-64.
No. 611. As shown in FIG. 8, in this gusset bag making machine 1, a raw roll 3 on which a film 2 which has already been gusset-folded is wound is used, and the film 2 is fed by a feed roller 4 through each guide roller 5 in a predetermined manner. The gusset bag G is intermittently fed out length by length, and a portion corresponding to the bag bottom is sealed on the take-out roller 6 by the bag bottom sealer 7 and cut at a predetermined position by the cutter 8 at the tip of the feed roller 4 to form an individual gusset bag G. The gusset bag G is sucked and held by the suction plate 9 and transferred to the intermittent rotary table type automatic packaging device 10.

The intermittent rotary table type automatic packaging device 10 is
A plurality of locations on the outer peripheral edge of the table T that rotates intermittently are provided with a pair of grippers 11 that abut the side surface of the gusset bag G and a pair of pedestals 12 that support the bottom surface of the gusset bag G, and the table T rotates intermittently. In the process, table T
Each process (I to VII) by each device arranged around the
An automatic packaging device configured to implement I). Here, an opening 11a communicating with a vacuum suction device (not shown) is formed on the inner facing surface of the gripper 11, and both sides of the gusset bag G are sucked by the gripper 11.

In the bag supplying step (I), the gusset bag G sucked on the suction plate 9 is inserted between the grippers 11 of the table T by the parallel movement of the suction plate 9, and then the gripper 11 is closed. Adsorb the side surface of the bag opening of the gusset bag G, open it as it is, and open the bag opening. Bag opening process (II)
In the gusset bag G having only the bag mouth opened, a mouth-sealing plate 14 having an air nozzle 13 is placed on the bag mouth by an elevator device (not shown), and the air blown from the air nozzle 13 completely opens the gusset bag G. As a result, the bag has a square bottom, and the pedestal 12 supports a part of the bottom surface and side surfaces. Subsequently, in a filling step (IV) through a preliminary step (III), the object to be filled is thrown into the gusset bag G through the hopper 15, and in the shaping step (V), the bag mouth of the filled gusset bag G is reached. A pair of shaping guide plates 16 are inserted, they are opened in opposite directions, and both sides are pressed by the shaping guides 17, whereby the bag mouth is shaped. In the sealing step (VI), the bag mouth is sealed by the top sealer 18, and in the discharging step (VII), the completed gusset bag G is discharged to the outside of the table T via the discharging conveyor 19. In addition, (VIII) is a preliminary process.

[0005]

In the apparatus disclosed in the above publication, a gusset-folded film is fed out from the original roll, and a portion corresponding to the bag bottom of the film is sealed with a bag bottom sealer, and a predetermined portion is cut with a cutter. The position is cut and separated into individual gusset bags, which are handed to the intermittent rotary table type automatic packaging device one by one. However, since the gusset-folded film 2 has a large thickness (compared to a flat-folded tube-shaped film), the roll 3 (see FIG. 7) wound around it has a short total length of the film.
There is a problem that the rolls are frequently replaced during the packaging work, resulting in poor workability and low productivity. The present invention has been made to solve the above conventional problems, and an object of the present invention is to reduce the frequency of roll replacement and improve workability and productivity.

[0006]

A method of making and packing a gusset bag according to the present invention is a gusset-folding method in which a flat-folded tube-shaped film wound in a roll shape is continuously fed by a gusset-folding means while being gusset-folded. A dancer roller is applied to the film in the feeding path to feed the film forward and tension is applied to the film, and then the film is intermittently fed, the bag bottom is sealed, and then the film is cut into individual gusset bags. Then, the gusset bags are fed one by one to an intermittent rotary table type automatic wrapping device equipped with a plurality of gusset bag holding means on the outer peripheral edge of a table that rotates intermittently,
It is characterized in that the gusset bag is sequentially subjected to the steps of opening the bag, filling the object to be packaged, sealing the mouth, discharging, and the like.

The gusset bag making and packaging machine according to the present invention is
A gusset bag making machine for making flat fold tube-shaped film rolled into individual gusset bags, and a plurality of gusset bag holding means on the outer peripheral edge of the table that rotates intermittently. Intermittent rotary table type automatic wrapping machine that sequentially performs each process such as bag, package filling, mouth sealing, discharge, etc., and delivery means for delivering gusset bags from gusset bag making machine to intermittent rotary table type automatic wrapping machine The gusset bag making machine comprises a gusset forming portion for gusset-folding while continuously feeding a flat-folded tubular film to the gusset folding means, and a gusset-forming film for receiving the gusset-folded film and intermittently feeding it A bag-making section that seals and subsequently cuts to make individual gusset bags, and a film that is sent from the gusset-forming section to the bag-making section is hung on the film Characterized in that it comprises a dancer roller that.

Further, in the gusset bag making and packaging machine, the gusset bag making machine is provided with a sensor for detecting the moving position of the dancer roller, and the film feed of the gusset forming section is controlled by the signal of the sensor. Further, the gusset forming section of the gusset bag making machine, roll film delivery means for delivering a flat folded tube-shaped film wound in a roll shape, and the path of the film sent to the gusset folding means. A preferable feature is that it is provided with a dancer roller that is hung around the roller and a sensor that detects the moving position of the dancer roller, and that the film feed of the roll film feeding means is controlled by the signal of the sensor.

[0009]

According to the present invention, the dancer is provided in the film path between the gusset forming section where the film is continuously fed and gusset-folded and the bag making section where the film is intermittently fed and made into individual gusset bags. Since the roller is applied and the slack of the film that occurs each time the bag making section is intermittently stopped is absorbed by the dancer roller, the gusset forming section (continuous feed) and the bag making section (intermittent feed) are operated in harmless operation. can do. Further, since the film that has just been gusset-folded is always under tension, the film whose gusset folds are maintained is sent to the bag-making section.

[0010]

Embodiments of the present invention will be described below with reference to FIGS. In this embodiment, the same parts as those in FIG. 8 are designated by the same reference numerals. First, FIG. 1 and FIG. 2 show a gusset bag making and packaging machine divided into two due to restrictions in drawing. The gusset bag making and packaging machine comprises a gusset bag making machine 25 and an intermittent rotary table type automatic packaging device 26. Of these, the gusset bag making machine 25 is roughly divided into a gusset forming section 27, a bag making section 28, and both. It is composed of a dancer roller 29 and the like interposed between the two.

The gusset forming section 27 of the gusset bag making machine 25
Is a roll film feeding motor 32 for feeding the film 30 from an original roll 31 (see FIG. 6) wound with a flat-folded tubular film 30, a gusset inserter 33 for continuously gusseting the film 30, and a gusset. A film feed roller 3 which is provided in front of and behind the folder 33 and holds the film 30 and continuously feeds the film 30 to the gusset folder 33.
4, 35, a film feed motor 36 for synchronously driving the film feed rollers 34, 35, and a moving path of the film 30 between the original roll 31 and the film feed roller 34. The dancer roller 37, the sensors 38a to 38c (upper limit detection sensor 38a, roll feed sensor 38b, lower limit detection sensor 38c) that detect the moving position of the dancer roller 37, and the roll film that receives signals from the sensors 38a to 38c It is composed of a control device 39 and the like for controlling the delivery motor 32.

The gusset inserter 33 is used for the film 3
A pair of folding guides 40 whose surfaces facing 0 are narrowed downward in a wedge shape are arranged so as to be closer to each other so that the distance between the folding guides 40 becomes smaller, and pressing plates 41 are arranged in close proximity to both side surfaces thereof. By passing the space surrounded by the folding guide 40 and the holding plate 41 from the top to the bottom while the film 30 is filled with air, both sides of the film 30 are formed in the gap between the folding guide 40 and the holding plate 41. It goes in and is gusseted.

In the moving path of the gusset-folded film 30 sent from the gusset forming section 27 to the bag making section 28, the dancer roller 29 is hooked on the film 30 and, as shown in FIG. Sensors 46a to 46c that are mounted movably up and down on a roller guide 45 having a guide groove 43 for accommodating the protruding shaft 29a of 29 and a stopper 44 at the lower end, and that detect the moving position of the dancer roller 29. The upper limit detection sensor 46a, the film feed sensor 46b, and the lower limit detection sensor 46c are arranged in the direction of the dancer roller 29 at predetermined intervals along the roller guide 45 (the dancer roller 37 also has the same structure as the guide). The sensors 38a to 38c are mounted on a roller, and the sensors 38a to 38c also follow the roller guide. They are arranged in the same way). The signals from the sensors 46a to 46c are sent to the controller 47, and the controller 47 controls the film feed motor 36 based on the signals.

Since the bag-making part 28 of the gusset bag-making machine 25 and each part constituting the intermittent rotary table type automatic packing device 26 are structurally and functionally the same as the conventional example shown in FIG. 8, detailed description thereof will be omitted. To do. In addition, from the original fabric roller 31 to the bag making unit 28
A large number of guide rollers 48a to 48n are provided on the moving path of the film 30 up to.

In the gusset bag making and packaging machine, the flat film 30 is fed from the original roll 31 by driving the roll film feeding motor 32, and continuously gusseted through the dancer roller 37, the film feeding roller 34 and the like. The film 30 that has entered the inserter 33, is gusset-folded, and then comes out, is continuously fed to the film feed roller 35,
After passing through the dancer roller 29 and the like, the bag making section 28 is entered. In the bag making section 28, the film 30 is intermittently fed by the feed roller 4 which rotates intermittently, and the portion corresponding to the bag bottom is sealed by the bag bottom sealer 7 on the take-out roller 6 and is fed at the tip of the feed roller 4. The gusset bag G is cut at a predetermined position by the cutter 8 into individual gusset bags G, and the gusset bags G are sucked and held by the suction plate 9 and delivered to the intermittent rotary table type automatic packaging device 26 to undergo a predetermined packaging operation.

Next, the role of the dancer roller 29 and the control of the film feed motor 36 by the sensors 46a to 46c will be described. The light from the light source built in the sensors 46a to 46c is the film 30 or the dancer roller 29.
The signal is sent to the control device 47 in response to the reflection on the surface of the film, and the signal is sent to the control device 47, and the control device 47 controls the film feed motor 36 as follows, for example. The feed speed of the film feed motor 36 is set in advance so as to substantially match the average feed speed of the feed roller 4 that rotates intermittently (for example, proportional control operation).

When the upper limit detection sensor 46a is on and the film feed sensor 46b and the lower limit detection sensor 46c are off (FIG. 4A), that is, when the dancer roller 29 is between the upper limit detection sensor 46a and the film feed sensor 46b, The film feed motor 36 continues to operate.
The dancer roller 29 is attached to the film 3 in the bag making section 28.
When 0 is intermittently fed, it moves upward by a distance approximately half the feed length (see the phantom line in FIG. 4A), and the bag making unit 28
The film 30 is moved down the same distance while the film 30 is stopped, and this is repeated.

As described above, the dancer roller 29 is movably interposed vertically in the moving path of the film 30 which changes from continuous feeding to intermittent feeding, and during the above-described normal operation, the dancer roller 29 is moved up and down by a predetermined distance to repeat the bag making portion 28. It has a function of absorbing the slack of the film 30 generated at each intermittent stop, and interlocking the continuously operated gusset forming section 27 and the intermittently operated bag making section 28 without any trouble. Then, the dancer roller 29 constantly applies tension to the film 30 that has just been gusset-folded in the gusset-folding device 33 and is not yet fully folded, and the gusset-folded film 30 is sent toward the bag-making section 28. In the meantime, it has the function of maintaining its crease shape (gusset forming part 2
A proper gusset crease cannot be maintained simply by slackening the film 30 in a U-shape between the bag 7 and the bag-making portion 28. ). In addition, if the gusset forming section and the bag making section are directly linked without dancer rollers and have no slack, and intermittent operation is performed throughout, the film passing through the gusset inserter undergoes a sudden change in tension due to intermittent feeding. It becomes impossible to manufacture a good quality gusset bag without deformation.

When the upper limit detection sensor 46a and the film feed sensor 46b are turned on and the lower limit detection sensor 46c is turned off (FIG. 4 (b)), that is, when the dancer roller 29 descends from the film feed sensor 46b, the film feed motor 36 is shifted. (Deceleration or deceleration including stop) is performed, and the dancer roller 29 is returned above the film feed sensor 46b. When it does not return, the cause may be, for example, the stop of the intermittent rotary table type automatic packaging device 26.

When the upper limit detection sensor 46a, the film feed sensor 46b, and the lower limit detection sensor 46c are all off (FIG. 4C), that is, when the dancer roller 29 rises above the upper limit, the film feed motor 36 is stopped, At the same time, the entire operation including the intermittent rotary table type automatic packaging device 26 is stopped. In this case, as a cause thereof, it is considered that some trouble has occurred in the gusset forming portion 27 or the original roll 31 itself. Upper limit detection sensor 46a and film feed sensor 46
b is off, the lower limit detection sensor 46c is on (see FIG.
(D)) That is, when there is no film 30 and the dancer roller 29 reaches the lower limit position, the film feed motor 36 is stopped and the intermittent rotation table type automatic packaging device 26 and the like are all stopped. In this case, the cause is a film break.

Next, the role of the dancer roller 37 and the method of controlling the roll film feeding motor 32 by the sensors 38a to 38c will be described. Sensor 38a-
Reference numeral 38c denotes an ON signal in response to the light from the built-in light source reflected by the film 30 or the surface of the dancer roller 37, similarly to the sensors 46a to 46c, and the ON signal is sent to the control device 39. Reference numeral 39 controls the roll film feeding motor 32, for example, as follows. The feed speed of the roll film feed motor 32 is set so that the film feed speed at the minimum diameter (finishing) of the original roll 31 matches the feed speed of the film feed motor 36.

When the upper limit detection sensor 38a is on and the roll feed sensor 38b and the lower limit detection sensor 38c are off (FIG. 5A), that is, when the dancer roller 37 is between the upper limit detection sensor 38a and the roll feed sensor 38b, The operation of the roll film feeding motor 32 is continued. During this period, the film feed speed from the original roll 31 is set to be higher than the feed speed of the film feed roller 34, so that the dancer roller 37 is gradually lowered. Upper limit detection sensor 38a and roll feed sensor 38b
Is on and the lower limit detection sensor 38c is off (see FIG.
(B)) That is, when the dancer roller 37 is lowered from the roll feed sensor 38b, the roll film feed motor 32 is stopped and the dancer roller 37 is returned above the roll feed sensor 38b. When it does not return, the cause may be, for example, the stop of the intermittent rotary table type automatic packaging device 26.

In this way, the dancer roller 37 is a film from the original roll 31 whose film feeding speed changes with the change of the roll diameter from the beginning to the end of the taking to the film feeding roller 34 which feeds the film at a constant speed. The upper limit detection sensor 38a and the lower limit detection sensor 38 intervene in a movement path of 30 so as to be vertically movable.
By vertically moving with the roller feed sensor 38b sandwiched between c, it has a function of absorbing the slack of the film 30 caused by the difference between the film feed speed from the original roll 31 and the feed speed of the film feed roller 34. .

When the upper limit detection sensor 38a, the roll feed sensor 38b, and the lower limit detection sensor 38c are all off (FIG. 5C), that is, when the dancer roller 37 rises above the upper limit, the roll film feed motor 32 is stopped. At the same time, all the post-process parts including the intermittent rotary table type automatic packaging device 26 are stopped. In this case, it is conceivable that some trouble has occurred in the original roll 31, for example. Upper limit detection sensor 38a and roll feed sensor 38b
Is off and the lower limit detection sensor 38c is on (see FIG.
(D)) That is, when there is no film 30 and the dancer roller 37 reaches the lower limit position, the roll film feeding motor 32 is stopped and all the post-process portions including the intermittent rotary table type automatic packaging device 26 are stopped. in this case,
The cause is out of film.

[0025]

According to the present invention, an original roll having a flat-folded tube-shaped film wound thereon is used and gusset-folded to be delivered to an automatic packaging device. The total length of the film becomes long, the frequency of exchanging the original roll during the packaging work can be reduced, and the workability and the productivity can be improved. Moreover, since a dancer roller that can be moved up and down is provided in the film path between the gusset forming section and the bag making section of the gusset bag making machine, the gusset forming section that is continuously operated and the bag making section that is intermittently operated are not hindered. It is possible to interlock, and when gusset folding is performed by the gusset folding means, a sharp tension change due to intermittent feeding is not applied to the film, and a good quality gusset bag can be manufactured and delivered to an automatic packaging device.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a gusset bag making and packaging machine (downstream portion) of an embodiment.

FIG. 2 is an explanatory view of a gusset bag making and packaging machine (upstream portion).

FIG. 3 is a sectional view (a) of the dancer roller portion,
And FIG.

FIG. 4 is a diagram for explaining the function of the dancer roller 29.

FIG. 5 is a diagram for explaining the function of the dancer roller 37.

FIG. 6 is a view showing an original roll on which a flat folding film is wound.

FIG. 7 is a view showing an original roll on which a gusset folding film is wound.

FIG. 8 is an explanatory diagram of a conventional gusset bag making and packaging machine.

[Explanation of symbols]

 25 Gusset bag making machine 26 Intermittent rotary table type automatic packaging device 27 Gusset forming part 28 Bag making part 29, 37 Dancer roller 30 Film 33 Gusset inserter 38a-38c, 46a-46c Sensor

Claims (4)

[Claims] 1. A flat-rolled tube-shaped film wound in a roll shape is gusset-folded while being continuously fed by a gusset-folding means, and a dancer roller is applied to the gusset-folded film in a feed path for feeding the film forward. The slack is absorbed and tension is applied, and then the film is intermittently fed, the bag bottom is sealed, and then the film is made into individual gusset bags, and the gusset bags are intermittently rotated on the outer periphery of the table. The invention is characterized in that the gusset bags are fed one by one to an intermittent rotary table type automatic wrapping device equipped with a gusset bag holding means, and the gusset bags are sequentially subjected to respective processes such as bag opening, filling of packaged items, sealing of mouths, and discharging. Gusset bag making and packaging method. 2. A gusset bag making machine for making a flat-folded tube-shaped film wound into a roll into individual gusset bags, and a plurality of gusset bag holding means provided on the outer peripheral edge of a table which rotates intermittently, Intermittent rotary table type automatic wrapping machine that sequentially performs each process such as bag opening, filling of packaged goods, sealing of mouth, discharge of gusset bag, and gusset bag from gusset bag making machine to intermittent rotary table type automatic wrapping machine A gusset bag making and packaging machine comprising a delivery means for delivering and receiving a gusset forming portion for gusset folding while continuously feeding a flat-folded tubular film to the gusset folding means, and a gusset. A bag-making section that receives a folded film, seals the bottom of the bag while intermittently feeding it, and then cuts it to make individual gusset bags, and from the gusset forming section to the bag-making section. A gusset bag making and packaging machine comprising a dancer roller that is hung on the film in the path of the film. 3. The gusset bag making machine is provided with a sensor for detecting the moving position of the dancer roller, and controls the film feeding of the gusset forming section by the signal of the sensor. The gusset bag making and packaging machine described in. 4. The gusset forming part, a roll film feeding means for feeding a flat-folded tube-shaped film wound in a roll shape, a dancer roller hung on a path of the film fed to the gusset folding means, 4. A gusset bag packaging according to claim 2 or 3, further comprising a sensor for detecting the moving position of the dancer roller, and controlling the film feeding of the roll film feeding means by the signal of the sensor. Machine.