JP6121815B2 - Device for preventing misalignment of collectives in horizontal bag making and filling machine - Google Patents

Description

  The present invention relates to an apparatus for preventing misalignment in a horizontal bag making and filling machine, which can be arranged in a cylindrical film at predetermined intervals without breaking a collective product supplied at predetermined intervals.

  In a horizontal bag making and filling machine, when packaging a collective product in which bag-filled products are stacked, a collective product to be supplied at predetermined intervals into a cylindrical film which is formed into a cylindrical shape by a bag-making means and transported is a supply conveyor. In the transport section from the time of feeding to the tubular film to the side sealing means, a positional deviation occurs due to disorder of the laminated state of the assembly, and when the side sealing is performed by the side sealing mechanism, There is a problem in that proper packaging cannot be performed due to contact interference between the body and the body.

  Thus, for example, Patent Document 1 discloses a position shift prevention apparatus that addresses such a problem. In the misalignment prevention device disclosed in Patent Document 1, after the inner layer of the packaging sheet is charged by the static electricity generator, the content made of the sheet-like pack is supplied onto the charged packaging sheet and fixed by static electricity. After stacking another packaging sheet on the packaging sheet supplied with the product, the outer edges of both packaging sheets are sealed by a heat seal device to form a heat seal portion, and the middle portion of the end seal portion of the heat seal portion Is cut with a cutting device to obtain a package.

Japanese Patent No. 3529082

  As disclosed in Patent Document 1, after a sheet-like article is supplied on a packaging sheet so as to be lined up at predetermined intervals, the two packaging sheets spread in a flat form are packaged so as to overlap each other. In this case, the packaging sheets can be stacked and packaged without any trouble in a state where the inner layer of the packaging sheet is charged. However, if the film is statically charged before it is formed into a cylindrical shape in a horizontal bag making and filling machine, the film is attracted to the bag making means for forming the film under the influence of static electricity, or the inner surface of the film The self-adsorption of each other causes a problem that the tube cannot be formed well. In addition, if the packaged product obtained by horizontal sealing and cutting is transported while being charged, the packaged product is stuck to the structure around the unloading means due to the influence of static electricity, and the delivery of the packaged product is hindered. There was also.

  The present invention has been proposed in view of the above-described problems inherent in the above-described conventional positional deviation prevention device, and has been proposed to suitably solve this problem. An object of the present invention is to provide an apparatus for preventing misalignment of a collective product in a horizontal bag making and filling machine that can be satisfactorily packaged without disturbing the collective state by a filling machine and can carry out a package after lateral sealing and cutting. To do.

In order to overcome the above-mentioned problems and achieve the intended object, an apparatus for preventing misalignment of collectives in a horizontal bag making and filling machine according to the invention of claim 1 comprises:
A bag making means for forming a belt-like film into a cylindrical shape, a supply conveyor for supplying an assembly of a plurality of articles into the cylindrical film formed into a cylindrical shape by the bag making means at predetermined intervals, and a tubular film In a horizontal bag making and filling machine comprising a horizontal sealing means for horizontally sealing and cutting by sandwiching a tubular film between each assembly supplied to
Between the downstream side of the bag making means and the upstream position of the lateral seal means, it is disposed above the film conveyance path, and holds the aggregated product in the cylindrical film from above, and the film feed speed when conveying the cylindrical film Auxiliary feeding means traveling at the same speed;
Above the transport path of the assembly between the bag making means and the auxiliary feeding means so as to indirectly charge static electricity to the assembly through the tubular film on the downstream side of the film entrance in the bag making means . electrostatically generating means disposed,
Discharging means for removing static electricity from the package separated from the tubular film and disposed above the unloading path spaced downstream from the cutting position of the tubular film sealed by the horizontal sealing means. It is characterized by.
According to the first aspect of the invention, since the film is adsorbed by static electricity around the aggregate supplied at predetermined intervals in the cylindrical film, the aggregate is transported to the sealing position of the horizontal sealing means. In this way, it is possible to prevent the positional displacement during the process and to perform good packaging. Further, since the plurality of articles constituting the collective product are also adsorbed to each other by static electricity, it is possible to more suitably prevent the collective state of the collective product from being disturbed. Furthermore, since the film is not charged with static electricity in the process of transporting the strip-shaped film to be formed into a cylindrical shape, it does not adversely affect the cylindrical formation of the strip-shaped film.
In addition, the static electricity charged in the packaged product separated from the cylindrical film is removed by the static eliminator, so when the packaged product is carried out, it is carried out by being adsorbed to the surrounding structure by static electricity. Can be prevented. In addition, since the static electricity is removed from the packaged product, the packaged product does not stick to each other due to static electricity in the packaging process and other distribution processes of the packaged product. Can be prevented.
In addition, since the belt-like film is not charged with static electricity during bag making, the film is attracted to the bag-making means by static electricity, the bag-making resistance increases, and the belt-like film meanders. Can be cylindrically shaped.

The present application includes the following technical ideas.
The static electricity generating means is arranged so as to directly charge static electricity to the assembly on the upstream side of the bag making means.
According to this configuration , the collective product before being supplied to the tubular film can be charged with static electricity so that the articles can be adsorbed to each other. Can be prevented from being disturbed.

In the invention according to claim 2 , the assembly has a transport bed on which the assembly to be transported is placed, and the assembly is charged with static electricity by ions moving from the static electricity generating means to the grounded transport bed side. It is characterized by comprising.
According to the invention which concerns on Claim 2 , the freedom degree of the arrangement | positioning position of a static electricity generation means can be raised by utilizing a conveyance bed as a grounding side.

  According to the apparatus for preventing misalignment of a collective product in the horizontal bag making and filling machine according to the present invention, the collective product can be satisfactorily packaged without being displaced by being arranged on the cylindrical film at predetermined intervals.

It is the schematic which shows the horizontal bag making filling machine provided with the position shift prevention apparatus which concerns on Example 1. FIG. It is explanatory drawing which shows the packaged goods manufactured with the horizontal bag-making filling machine. FIG. 2 is a schematic view showing a relationship between a supply conveyor and static electricity generating means, as viewed from the direction of arrow A in FIG. 1. It is the schematic which shows the principal part of the horizontal bag-making filling machine provided with the position shift prevention apparatus which concerns on Example 2. FIG.

  Next, with respect to the apparatus for preventing misalignment of a collective product in the horizontal bag making and filling machine according to the present invention, in this embodiment, the misalignment of the collective product 20 in which a plurality of flat bag-filled products (articles) are stacked vertically is prevented. An example of the apparatus will be described below with reference to the accompanying drawings. In addition, as a material of the film used for packaging, for example, a plastic film made of a CPP (unstretched polypropylene) film or other material capable of charging static electricity is used. The same applies to the bag material of each bag-packed product constituting the assembly 20. In the embodiment, as shown in FIG. 2, a partition material 11 made of a soft plastic molding similar to the above-described bag material is arranged at the center of two bag-packed products arranged in the front and rear, and the center of the partition material 11 is arranged. In the following description, the assembly 20 in which the bag-packed products are stacked and mounted on the bottom receiving pieces 11b and 11b extending forward and backward of the partitioning piece 11a projecting upward will be described as one unit. .

1, there is shown a horizontal bag filling machine having a displacement prevention device according to the actual Example 1, the horizontal bag filling machine, drawn through the feed roller 10, 10 from the original film roll The strip-shaped film 12 is guided by the bag making means 14 and formed into a cylindrical shape. On the upstream side of the bag making means 14 is provided a supply conveyor 22 for supplying the aggregated product 20 to the cylindrical film 12a at regular intervals by a number of feeding bodies 18 attached to the endless chain 16 at predetermined intervals. . As shown in FIG. 3, the supply conveyor 22 includes a first transfer bed (transfer bed) 24 on which the assembly 20 is placed and transferred, and protrudes upward from a gap formed in the first transfer bed 24. The assembled product 20 is configured to be fed toward the tubular film 12a by the pushed body 18. The first transfer bed 24 is formed of an electric conductor made of a metal such as stainless steel and is grounded, and extends to the vicinity of the bottom plate of the bag making means 14. The supply conveyor 22 is provided with side guides 26, 26 extending in the conveying direction of the assembly 20 at the left and right ends of the first conveying bed 24, and conveyed to the bag making means 14 by the pusher 18. The side guides 26 and 26 regulate the displacement of the assembled product 20 in the left-right direction.

  On the downstream side of the bag making means 14, the tubular film 12 a extends downward from a gap of a second transport bed (transport bed) 25 on which the aggregate 20 supplied to the tubular film 12 a is placed and transported. A pair of feed rollers 28, 28 (only one is shown) which sandwiches the overlapping edge portion and transports the film 12 a toward the downstream side, and a pair of seals located on the downstream side of the rollers 28, 28 A vertical seal mechanism 32 composed of rollers 30 and 30 (only one is shown) is disposed below the conveyance path of the assembly 20. And it is comprised so that a vertical seal | sticker mechanism 32 may perform a vertical seal | sticker to the superposition | polymerization edge part of the longitudinal direction of the cylindrical film 12a to which the aggregated product 20 was supplied. The second transfer bed 25 is formed of an electric conductor made of a metal such as stainless steel and is grounded in the same manner as the first transfer bed 24.

  On the downstream side of the vertical seal mechanism 32, as shown in FIG. 1, a horizontal seal mechanism is provided with a pair of upper and lower seal bodies 34, 34 that perform a horizontal seal in a direction crossing the conveying direction of the tubular film 12 a and cut it. (Sealing means) 36 is provided. The pair of seal bodies 34, 34 move away from each other after moving a predetermined distance toward the downstream side at a speed synchronized with the film transport speed while sandwiching the cylindrical film 12a by approaching from a position where they are separated from each other. Configured to repeat the operation. In this way, each time the tubular film 12a is transported by one packaging length, the sealing bodies 34, 34 sandwich the tubular film 12a at the front and back positions sandwiching the aggregate 20 of the tubular film 12a, and the tubular film. 12a is laterally sealed and cut. In addition, a transport conveyor 38 is disposed on the upstream side with the horizontal seal mechanism 36 interposed therebetween, and a carry-out conveyor 40 is disposed on the downstream side. The opposing ends of the conveyor 38 and the carry-out conveyor 40 move away from each other when the pair of seal bodies 34 and 34 approach each other, and allow the lower seal body 34 to pass when it rises. When the pair of seal bodies 34 and 34 are separated from each other, they move so as to be close to each other so that the assembly 20 in the tubular film 12a can be smoothly transferred between the conveyors. The packaged product 46 that has been laterally sealed and cut by the lateral seal mechanism 36 and separated from the tubular film 12 a is configured to be carried out by the carry-out conveyor 40. Note that the upstream end of the transfer conveyor 38 extends to the vicinity of the downstream end of the second transfer bed 25.

  In the upper part of the film transport path from the downstream side of the bag making means 14 to the upstream position from the operating range in which the sealing bodies 34, 34 in the lateral sealing mechanism 36 sandwich the tubular film 12a and laterally seal it, FIG. As shown in FIG. 2, a pressing conveyor (an endless transport body) 42 as an auxiliary feeding means is provided. The pressing conveyor 42 abuts the upper surface of the cylindrical film 12a conveyed from the second conveying bed 25 to the conveying conveyor 38, and the upper surface of the assembly 20 supplied into the cylindrical film 12a at predetermined intervals. A plurality of sponge-like or brush-like pressing members 42a that are pressed in a light contact state and run at the same speed as the film feed speed are provided. As a result, the aggregate 20 supplied to the cylindrical film 12a at predetermined intervals is maintained without disturbing the laminated state and is auxiliary fed without being displaced. The upstream end of the press conveyor 42 faces a position where the feeding body 18 of the supply conveyor 22 can come into contact with the upper surface of the collective product 20 before being released from the rear of the collective product 20. Further, on both the left and right sides of the film transport path in the section from the bag making means 14 to the position close to the upstream side of the operating range of the lateral seal mechanism 36, the left and right sides of the aggregate 20 supplied into the tubular film 12a are slightly different. Side guides (not shown) made of an elastic material equivalent to the conveyor 42 are provided so as to be able to guide the left and right sides of the tubular film 12a so that a gap is provided. .

  On the upstream side of the bag making means 14, above the conveying path of the supply conveyor 22, a static electricity generating means 44 for directly charging static electricity to the assembly 20 immediately before being fed into the tubular film 12 a by the supply conveyor 22. Is arranged. The static electricity generating means 44 is configured so that the static electricity generating member 44a can swing back and forth in the transport direction of the collective product 20, and the discharge needle described later is directed toward the laminated surface of the collective product 20 to pack the bag most effectively. The product (laminated product) is configured to be adjusted in a predetermined direction in which the product (stacked product) can be adsorbed. Further, the static electricity generating means 44 is configured to be able to adjust the height position of the static electricity generating member 44a from the first transport bed 24, and can flexibly cope with a change in the status of the collective product 20.

  As the static electricity generating means 44, a non-contact type static electricity generating means 44 for charging static electricity in a non-contact manner with respect to an object is preferably used. The static electricity generating means 44 includes a DC high voltage generator and a charging electrode, and is produced by applying a high voltage (plus or minus polarity) from the DC high voltage generator to the discharge needle of the charging electrode. The generated ions are configured to move to the first transfer bed 24 side that is a grounding side. And the collective goods 20 conveyed along the 1st conveyance bed 24 are statically charged by the ion which moves to the 1st conveyance bed 24 side, and each bagging goods adsorb | suck each other, and lamination | stacking of the collective goods 20 is carried out. The state can be maintained. The static electricity generating means 44 is positioned at a position where ions generated from the charging electrode do not reach the side of the belt-like film 12 before being formed into a cylindrical shape by the bag-making means 14, and static electricity is charged in the belt-like film 12. Configured not to.

  Above the carrying path of the carry-out conveyor 40, a static elimination means 48 is disposed at a position spaced downstream from the cutting position of the tubular film 12a sealed by the horizontal sealing mechanism 36. The static elimination means 48 has the same basic configuration as the static electricity generation means 44, generates ions having a polarity opposite to that generated by the static electricity generation means 44, and cuts the ions from the cylindrical film 12a. The static electricity of the packaged product 46 that has been charged can be removed by spraying the separated packaged product 46 with air.

  Next, the operation of the assembly position preventing apparatus configured as described above will be described.

  The assembled product 20 placed on the first transfer bed 24 of the supply conveyor 22 and stacked one above the other and transported by the pusher 18 passes under the static electricity generation means 44 immediately upstream of the bag making means 14. When passing, the static electricity is charged by the ions generated by the static electricity generating means 44. The collective product 20 charged with static electricity can maintain a stacked state in which individual bag-packed products are adsorbed to each other by static electricity. Further, the bottom-packed product is adsorbed to the bottom receiving pieces 11b, 11b of the partition member 11, and the positional shift of the packaged product before and after the partitioning piece 11a is prevented. Furthermore, by using the first transport bed 24 disposed over a long section in the transport direction as the grounding side, the degree of freedom of the position where the static electricity generating means 44 is disposed can be increased. In Example 1, since it is comprised so that the ion which generate | occur | produced in the static electricity generation means 44 may not reach the strip | belt-shaped film 12 before shape | molding by the bag making means 14 at cylinder shape, the strip | belt-shaped film 12 is cylindrical by static electricity. When the film is formed, it is adsorbed by the bag making means 14 to increase the bag forming resistance, and the belt-like film 12 meanders. For example, the film can be well formed without hindering the film conveyance.

  When the collective product 20 charged with static electricity is supplied into the cylindrical film 12a formed by the bag making means 14 at predetermined intervals, the upper, lower, left, and right films covering the collective product 20 are collected by the static electricity. Adhere closely to the top and bottom and both sides. Then, the assembly 20 is conveyed toward the horizontal seal mechanism 36 together with the tubular film 12a without being displaced because the movement of the tubular film 12a is restricted from moving back and forth and from side to side. Further, the pressing member 42a of the pressing conveyor 42 extends from the bag making means 14 to a position in the vicinity of the upstream side of the operating range of the lateral seal mechanism 36, and the collective product 20 is pushed by the transfer conveyor 38. Is transported to the sealing position of the horizontal sealing mechanism 36 without the lamination state being varied and without being displaced. Therefore, the cylindrical body 12a is laterally sealed and cut without the sealing bodies 34, 34 of the lateral sealing mechanism 36 coming into contact with the assembly 20, and good packaging is achieved.

  The tubular film 12a transported by the transport conveyor 38 is stretched to the tubular film 12a when it is adsorbed and sealed by the charged static electricity until it is laterally sealed and cut by the lateral seal mechanism 36. Therefore, it is hard to produce seal wrinkles. Further, the static electricity is removed from the packaged product 46 carried out from the horizontal seal mechanism 36 by the carry-out conveyor 40 by the static elimination means 48. That is, the static electricity charged in the package 46 immediately after being transported from the horizontal seal mechanism 36 is removed by the static eliminating means 48, so that the package 46 is attracted to the structure around the carry-out conveyor 40 and is unloaded. There is no inhibition. Further, the packaged products do not stick to each other during the transport process to the boxing machine or the like in the subsequent process, and various subsequent processes, and the handling of the packaged product 46 is not hindered.

  Next, the second embodiment of the present invention will be described only with respect to the differences from the first embodiment. In the second embodiment, the arrangement position of the static electricity generating means 44 is different from the first embodiment. That is, as shown in FIG. 4, in Example 2, the assembly 20 is conveyed immediately downstream of the film inlet into which the belt-like film 12 is introduced in the bag making means 14 and up to the upstream end of the pressing conveyor 42. Static electricity generating means 44 is disposed above the road. The configuration of the static electricity generating means 44 itself is the same as that of the first embodiment, and the static electricity generating member 44a is configured to be adjustable. Further, the ions generated by the static electricity generating means 44 move to the second transport bed 25 side, and the ions are charged by the ions on the cylindrical film 12a transported along the second transport bed 25. . Further, the static electricity generating means 44 is positioned at a position where ions generated from the charging electrode do not reach the side of the belt-like film 12 before being formed into a cylindrical shape by the bag-making means 14, and static electricity is generated in the belt-like film 12. Configured not to be charged.

  In the second embodiment, the cylindrical film 12a immediately after being formed into a cylindrical shape by the bag making means 14 is charged with static electricity by the ions generated by the static electricity generating means 44, and the assembled product supplied into the cylindrical film 12a. Static electricity is also indirectly charged on the film 20 through the film. Also in the second embodiment, the assembled product 20 supplied into the cylindrical film 12 a is vertically, horizontally, and horizontally covered with the individual packaged products adsorbed to each other by static electricity charged through the film. This film has the same effect as that of the first embodiment by being in close contact with the upper and lower sides and both sides of the assembly 20 by static electricity. Further, in Example 2, since the cylindrical film 12a immediately after being formed into a cylindrical shape is configured to be charged with static electricity, when the belt-like film 12 is formed into a cylindrical shape due to static electricity, it is attracted to the bag making means 14. The bag forming resistance is increased, and the belt-like film 12 meanders. For example, the film can be well formed without hindering the film conveyance. In addition, in Example 2, the other effect which Example 1 show | plays of course is show | played.

(Example of change)
The present invention is not limited to the configuration of the examples, and various embodiments can be adopted within the scope of the gist of the present invention. For example, the following modifications can be made.
(1) The collective product is not limited to the product stacked in the vertical direction, but may be any product as long as it is stacked in the horizontal direction or the front-rear direction, that is, each packaged product is bundled.
(2) The operation method of the seal body of the horizontal seal mechanism is not limited to the box motion method, and may be a rotation operation method.
(3) As the static elimination means, it is possible to adopt a means for removing static electricity by bringing a highly conductive static elimination material into contact with the package.
(4) Instead of providing stationary side guides on both sides of the transport path for the assembly, a system that transports the assembly by elastically holding both sides of the assembly using auxiliary feeding means such as a conveyor similar to a press conveyor Can be adopted.

12 filmstrip 12a tubular film 14 bag unit 22 supplies conveyors
2 5 Second transfer bed (transfer bed)
36 Horizontal seal mechanism (transverse seal means)
42 Holding conveyor (auxiliary feeding means)
44 Static electricity generation means 46 Packaged goods 48 Static elimination means

Claims (2)

A bag-making means (14) for forming the belt-like film (12) into a cylindrical shape, and a cylindrical film (12a) formed by the bag-making means (14) into a collective product (20) obtained by collecting a plurality of articles. Horizontally sealed and cut by sandwiching the cylindrical film (12a) between the supply conveyor (22) supplied at predetermined intervals to each assembly (20) supplied in the cylindrical film (12a) In a horizontal bag making and filling machine comprising a sealing means (36),
Arranged above the film conveying path between the downstream side of the bag making means (14) and the upstream position of the lateral seal means (36), and the aggregated product (20) in the tubular film (12a) from above. Auxiliary feeding means (42) that presses and travels at the same speed as the film feeding speed when transporting the tubular film (12a),
The auxiliary means from the bag making means (14) so as to indirectly charge static electricity to the assembly (20) via the tubular film (12a) on the downstream side of the film inlet in the bag making means (14). feed means (42) to between the aggregate parts and arranged on the transport path side of (20) static electricity generating means (44),
The packaged product (46) disposed above the carry-out path spaced downstream from the cutting position of the tubular film (12a) sealed by the lateral sealing means (36) and separated from the tubular film (12a) An apparatus for preventing misalignment of a collective product in a horizontal bag making and filling machine, characterized by comprising a static eliminating means (48) for removing static electricity from the bag. The collective product (20) having a transport bed ( 25) on which the transported collective product (20) is placed, and the collective product by ions moving from the static electricity generating means (44) to the grounded transport bed ( 25) side (20) the displacement prevention device of the set items in the claim 1 Symbol placement of horizontal bag filling machine, characterized by being configured so as to charge static electricity.

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