JP4079634B2 - Bag making method and bag filling method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag making method and a bag making filling method of a gusset type bag made of a soft packaging material and having a plastic chuck attached to an opening.
[0002]
[Prior art]
Conventionally, a bag with a chuck made of a soft packaging material such as a plastic film and having a plastic chuck attached to an opening is used, and a gusset type bag with a chuck is also known as one of them. As one method of making a bag with a gusset type zipper, filling the contents, and sealing, a method using a vertical gusset filling device is known. In this method, a chuck in a state where the male side member and the female side member are engaged with each other is temporarily attached to a predetermined position of the continuous belt-like soft packaging material, and the soft packaging material is sent to the filling bag making portion, Filling the contents while making a bag, then heat-sealing the male side member and female side member constituting the chuck to the bag inner surface facing each other, heat-sealing the top of the bag, and separating the bag-made bag It is operating.
[0003]
[Problems to be solved by the invention]
However, in such a conventional method, the soft packaging material before bag making is temporarily attached to the chuck, and the soft packaging material with the chuck is sent to the filling bag making portion for bag making. When forming into a shape, the chuck is bent. For this reason, there is a problem that an excessive force is applied to the chuck and the chuck is detached from the soft packaging material or is damaged. Further, since the chuck is attached, a temporary fixing to the soft packaging material and a two-stage sealing operation of the main seal to the inner surface of the bag after bag making are required, resulting in high cost. In addition, after making the bag temporarily attached to the soft packaging material, the inner surface of the bag is heat-sealed. This heat-sealing position is located far from the temporary fastening position of the chuck in the longitudinal direction of the soft packaging material. For this reason, the position of the chuck may be shifted from the sealing position by the heat sealing device due to the expansion of the soft packaging material in the middle and the like, which may cause a sealing failure.
[0004]
The present invention has been made in view of such problems, and provides a bag-making method and a bag-filling method for a bag with a chuck that can securely attach the chuck to the inner surface of the bag without damaging the chuck. Let it be an issue.
[0005]
[Means for Solving the Problems]
The present invention stops temporarily fixing a chuck to a soft packaging material before bag-making, and instead forms a continuous soft packaging material into a gusset-like shape with an open side portion. And a bottom wall provided with a groove for supporting the upper and lower surfaces of the chuck and passing a guide protrusion formed in the chuck. In the portion provided with a wall and inserted into the flexible packaging material, the bottom wall and the top wall support only about half of the entire width of the chuck, and the chuck is used to expose the remaining portion. The portion exposed from the bottom wall and the top wall of the chuck is heated and pressurized from above the flexible packaging material to weld the chuck to the flexible packaging material facing it, and then the top of the bag or Bottom It is obtained by a configuration in which the seal and the side seal region. With this configuration, the bag can be reliably welded to a predetermined position on the inner surface of the bag without damaging the chuck, and a continuous gusseted bag with the chuck attached to the predetermined position can be manufactured. Then, this continuous form of bag is supplied to the filling device, cut into individual bags, filled with contents, and then the opening of the bag is sealed, thereby filling and sealing the gusset bag. be able to. In addition, by connecting the continuous bag making process and the filling process so as to constitute one production line, it is possible to carry out in-line bag making, filling and sealing, and the contents can be improved with high productivity. A filled gusseted bag with a chuck can be manufactured.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. Fig.10 (a) is a schematic perspective view which shows the bag 1 with a gusset type chuck manufactured by the bag making filling method which concerns on embodiment of this invention. This gusset bag 1 is made of a flexible packaging material 2 and has folding portions 3 that are folded inward on both sides, and a top seal 4 and a bottom seal 5 are formed at the upper and lower ends, and just below the top seal 4. It is the structure which attached the chuck | zipper 6 to. The chuck 6 used here includes a male member 7 and a female member 8 as shown in FIG. The male member 7 includes a protruding fitting portion 7a and a flat plate portion 7b, and the female member 8 includes a fitting portion 8a and a flat plate portion 8b each having a groove for fitting the fitting portion 7a of the male member 7. I have. The chuck 6 is attached to the flexible packaging material 2 by heat-sealing the flat plate portions 7ba and 8ba above the fitting portions 7a and 8a of the flat plate portions 7b and 8b. A region 9 indicated by hatching in FIG. 10A is a region where the chuck 6 is heat sealed to the soft packaging material 2. In FIG. 10B, guide ribs 7bb and 8bb are also formed on the flat plate portions 7b and 8b of the chuck 6.
[0007]
FIG. 1 schematically shows an apparatus used for a bag making and filling method according to an embodiment of the present invention. 10 is a soft wrapping material roll for feeding out a continuous strip-shaped soft wrapping material 2, and 11 is a gusset-like side portion while the continuous soft wrapping material 2 fed out from the soft wrapping material roll 10 is fed in the longitudinal direction. It is a forming part that forms into an open form. As shown in FIG. 2, the gusset-like form formed here and the side part opened are provided with a folding part 3 that is folded inward on both sides, and an opening 13 is formed by separating one side part. It is a form. In order to form the flexible packaging material 2 pulled out from the flexible packaging material roll 10 into the form shown in FIG. 2, the flexible packaging material 2 is folded into the form shown in FIG. A method of going, or while sealing the both sides of the flexible packaging material 2 while feeding it into a cylindrical shape, the cylindrical flexible packaging material is folded into the form shown in FIG. 2 by a guide provided along the conveyance path, and then A method of cutting one of the side folds to form the opening 13 can be mentioned, and the forming unit 11 shown in FIG. 1 is omitted from illustration, but any one of the methods described above is performed. An apparatus is provided. In this embodiment, the single flexible packaging material 2 is molded in the form of the gusset shown in FIG. 2 and the side portion is opened. However, the present invention is not limited to this configuration. As shown in Fig. 3, the folded flexible packaging materials 2B and 2B are sandwiched between both side edges of the two flexible packaging materials 2A and 2A, and the three edges shown by a, b and c are heat sealed. , D may be used as the opening 13.
[0008]
In FIG. 1, 21 is a chuck insertion fixing portion for inserting a chuck into the soft packaging material formed in a gusset shape from the opening of the side portion and heat-sealing the chuck to the soft packaging material 2, and 23 is a bag. It is the bag seal part which performs the seal | sticker and side seal of the area | region used as a top. FIG. 4 schematically shows the chuck insertion fixing portion 21 and the bag seal portion 23. The chuck insertion fixing portion 21 has a chuck insertion device 25 that pulls out the chuck 6 from a chuck roll 24 that feeds the continuous chuck 6, cuts the chuck 6 into a predetermined length, and inserts the chuck 6 into the soft packaging material 2. 2 is provided with a chuck seal device 26 for heat-sealing.
[0009]
As shown in FIGS. 5A and 5B, the chuck insertion device 25 includes a chuck guide 28 for guiding the chuck 6 so as to be fed into the flexible packaging material 2 formed in a gusset shape, and the chuck 6. Feed rollers 29, 30, 31 and a pusher 33 for feeding toward the flexible packaging material 2 and a cutter 35 for cutting the chuck 6 into a predetermined length are provided. The chuck guide 28 is disposed so as to be inserted into the flexible packaging material 2 from the opening 13 in the side portion of the flexible packaging material 2. Here, the insertion position of the chuck guide 28 into the soft wrapping material 2 is set on the folds on both sides of the gusset-shaped soft wrapping material 2 as shown in FIG. The insertion position is not limited to this, and as shown in FIG. 7B, the insertion position may be inserted below the fold on the side opposite to the opening 13.
[0010]
As shown in a cross section in FIG. 8A, the chuck guide 28 is provided with a bottom wall 28 a and a top wall 28 b that support the entire width of the upper and lower surfaces of the chuck 6, and both side edges of the chuck 6. Are provided on the bottom wall 28a and the top wall 28b, and grooves 28e for guiding the ribs 7bb and 8bb formed in the chuck 6 are formed in the longitudinal direction. Further, at the portion of the chuck guide 28 inserted into the flexible packaging material 2, the bottom wall 28 a and the top wall 28 b support only about half of the entire width of the chuck 6 as shown in FIG. The portions 7ba and 8ba that are welded to the inner surface of the bag of the chuck 6 are exposed. In FIG. 5, openings are formed in the bottom wall 28 a and the top wall 28 b of the chuck guide 28 so that feed rolls 29, 30, 31 and a pusher 33 can be arranged.
[0011]
The feed rolls 29, 30, 31 are connected to a driving device (not shown) so as to rotate at the same speed, but the feed roll 31 closest to the flexible packaging material 2 and the other feed rolls 29, 30 are connected. It can be intermittently connected by a clutch or the like so that it can be driven and stopped separately. As a result, as shown in FIG. 6 (a), after the chuck 6 with its tip separated and the subsequent chuck 6 are fed at the same speed, the feed rolls 29 and 30 are stopped as shown in FIG. 6 (b). Thus, the travel of the subsequent chuck 6 is stopped, and only the tip-side chuck 6 is further conveyed by the feed roll 31, and a space in which the pusher 33 can be inserted between the chucks 6, 6 can be formed. The feed roll 31 closest to the soft wrapping material 2 is configured to be retractable so as to widen the gap between the pusher 33 when the pusher 33 is inserted between the upper and lower feed rolls 31, 31.
[0012]
As shown in FIG. 6A, the pusher 33 is retracted downward so as not to interfere with the chuck 6 when the chuck 6 is fed by the feed rolls 30 and 31, but FIG. As shown in FIG. 6, after the rear end of the chuck 6 reaches the position of the feed roll 31, as shown in FIG. 6C, the chuck 6 moves up to the traveling position and then advances horizontally. The rear end of the chuck 6 is pushed so that the chuck 6 can be pushed into a predetermined position in the soft packaging material 2. The cutter 35 is for cutting the chuck 6 into a predetermined length.
[0013]
The chuck insertion operation by the chuck insertion device 25 configured as described above is performed as follows. As shown in FIG. 6A, the feed rolls 29, 30, and 31 feed the chuck 6 toward the soft packaging material 2 through the chuck 6 cut to a predetermined length at the tip and the subsequent chuck 6. Then, as shown in FIG. 6B, when the position where the subsequent chuck 6 is to be cut reaches below the cutter 35, the feed rolls 29 and 30 are stopped, and the subsequent chuck 6 is stopped. On the other hand, the feed roll 31 continues to rotate and continues to feed the tip chuck 6. When the rear end of the chuck 6 reaches the position of the feed roll 31, the feed roll 31 also stops. Thereafter, as shown in FIG. 6 (c), the pusher 33 rises to the running position of the chuck 6 and then advances horizontally to push the rear end of the chuck 6 so that the chuck 6 is moved to a predetermined position in the flexible packaging material 2. Insert at the position. In parallel with this operation, the cutter 35 operates to cut the chuck 6 into a predetermined length. Thereafter, the feed rolls 29, 30 and 31 are rotated again to feed the next chuck 6 toward the soft packaging material 2. Thereafter, by repeating the same operation, the chuck 6 is successively fed into the flexible packaging material 2.
[0014]
4 and 5, the chuck seal device 26 that heat-seals the chuck to the soft packaging material 2 includes heat seal bars 40 and 40 that are disposed vertically with the chuck insertion position of the soft packaging material 2 interposed therebetween. . As shown in FIG. 9, the heat seal bars 40, 40 are arranged at positions where the exposed portions 7 ba, 8 ba of the soft packaging material 2 held by the chuck guide 28 are sandwiched. Thus, by pressing and heating the soft wrapping material 2 from the outside by the upper and lower heat seal bars 40, 40, the flat plate portion 7ba of the male side member 7 of the chuck 6 and the flat plate portion 8ba of the female side portion 8 face each other. It can be welded to the soft packaging material 2 (the inner surface of the bag). The opposing surfaces of the flat plate portions 7ba and 8ba are configured not to be welded to each other even when pressurized and heated.
[0015]
In FIG. 4, the bag seal portion 23 includes a heat seal bar 42 that seals the entire width of the flexible packaging material 2 above and below the flexible packaging material 2, and a heat seal bar that seals the left and right side edges of the flexible packaging material 2. 44 is provided.
[0016]
In FIG. 1, reference numeral 50 denotes a rotary filling device. The filling device 50 cuts the soft wrapping material 2 formed into a continuous bag shape into individual bags 1A, and holds the bags 1A on a holding tool (not shown) that turns intermittently to form a circular conveyance path. It has a function of intermittently moving along, opening the bag 1A at each stop position, filling the contents, sealing the opening of the bag, and then discharging. In addition, since a well-known thing can be used suitably as the filling apparatus 50, detailed description is abbreviate | omitted.
[0017]
Next, bag making and filling operation by the apparatus having the above configuration will be described. In FIG. 1, the soft wrapping material 2 is pulled out from the soft wrapping material roll 10 and travels intermittently through the forming portion 11, the chuck insertion fixing portion 21, and the bag seal portion 23. Here, the one-time moving distance of the flexible packaging material 2 is set equal to the length of the bag to be manufactured. When the soft wrapping material 2 passes through the forming portion 11, the soft wrapping material 2 is formed into a gusset-like form (a form shown in FIG. 2) with the side portions open. Then, before or after the position where the chuck of the flexible packaging material 2 formed into a gusset is to be attached reaches the chuck insertion fixing portion 21 and stops, it is cut into a predetermined length as shown in FIG. The chuck 6 is fed to a predetermined position in the flexible packaging material 2 by the chuck guide 28. Next, while the soft wrapping material 2 is stopped, the chuck seal device 26 (see FIG. 9) is operated to pressurize and heat the chuck 6 from the outside of the soft wrapping material 2, and the male side member of the chuck 6. 7 and the female member 8 are welded to the inner surface of the bag. Thus, the chuck 6 is securely attached to a predetermined position on the inner surface of the bag. Thereafter, when the soft packaging material 2 moves, the chuck 6 moves together with the soft packaging material 2 and moves away from the chuck guide 28. Then, the next chuck 6 is fed into the tip portion of the chuck guide 28.
[0018]
On the other hand, when the soft wrapping material 2 to which the chuck 6 is attached is stopped thereafter, a top seal is applied to the top region of the bag at the bag seal portion 23, and then both side edges of the bag are sealed, The opening 13 is closed. In order to close the opening 13, it is not always necessary to seal both side edges. Therefore, the seal on the side opposite to the opening 13 may be omitted, but in this embodiment, the bag has a symmetrical shape. In order to do so, both side edges are sealed. As described above, the soft wrapping material 2 drawn out from the soft wrapping material roll 10 is formed into a continuous gusset-shaped bag with the chuck 6 attached at a predetermined position.
[0019]
Next, in FIG. 1, this continuous form of bag is sent to a rotary filling device 50, the bottom portion of the bag is cut and separated into individual bags 1A, and the bag 1A is in a state with the bottom up. Thus, it is held by a holding tool (not shown) that turns intermittently. While the bag 1A held by the holder is intermittently swiveled, the opening at the upper end is opened, the contents are filled, the opening of the bag is sealed (a bottom seal is formed), and then discharged. The In addition, although illustration is abbreviate | omitted, the apparatus which shapes the bag 1A after sealing into the preferable form as goods is provided in the downstream of the filling apparatus 50, and it is figured by shaping by that apparatus. 9 is formed.
[0020]
As described above, in the above-described embodiment, the manufacture, filling of contents, sealing, and the like of the gusset-type bag with a chuck can be performed in-line with high productivity. In this embodiment, the chuck 6 is attached, the top seal, the side seal, and the like are performed while intermittently feeding the flexible packaging material 2 drawn from the flexible packaging material roll 10, but the present invention has this configuration. Not limited to the above, the attachment of the chuck 6, top sealing, side sealing, and the like may be performed while the flexible packaging material 2 is continuously fed. In that case, the chuck insertion device 25, the chuck seal device 26, the top seal, the seal device for performing the side seal, and the like may be moved back and forth or moved in a box shape in synchronization with the movement of the flexible packaging material 2.
[0021]
【The invention's effect】
As described above, the present invention forms a continuous soft wrapping material into a gusset-like shape with an open side portion, and is inserted into the soft wrapping material from the opening of the side portion in advance. A chuck guide for supporting the upper and lower surfaces of the chuck and including a bottom wall and a top wall with a groove through which guide ribs formed on the chuck are inserted and inserted into the flexible packaging material Then, the chuck is inserted using the chuck guide having a structure in which the bottom wall and the top wall support only approximately half of the entire width of the chuck and the remaining part is exposed , and from the bottom wall and the top wall of the chuck, heating the portion exposed from the top of the flexible packaging, pressurized welded to flexible packaging facing it the chuck, then a configuration in which the seal and the side seal region to be a top or bottom of the bag As a result, the soft packaging material temporarily fixed to the chuck as in the past is not passed through the bag making process and an excessive force is not applied to the chuck. For this reason, the inner surface of the bag is surely determined without damaging the chuck. It is possible to manufacture a bag in the form of a continuous gusset with the chuck attached at a predetermined position and a continuous position. In addition, by directly connecting the filling process behind this manufacturing process, it is possible to carry out in-line bag making, filling, and sealing, and it is possible to manufacture a gusseted zippered bag filled with contents with high productivity. An effect is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an example of an apparatus used for carrying out a bag making and filling method according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a flexible packaging material formed into a gusset shape. Fig. 4 is a schematic cross-sectional view showing another example of a soft packaging material molded into a shape. Fig. 4 is a schematic perspective view of a chuck insertion fixing portion and a bag seal portion. Fig. 5 (a) is a schematic cross-sectional view of a chuck insertion device. Schematic plan view of the insertion device [Fig. 6] (a), (b) and (c) are schematic cross-sectional views for explaining the operation of the chuck insertion device. [Fig. 7] (a) and (b) are chucks for the soft packaging material. FIG. 8A and FIG. 8B are schematic cross-sectional views showing the AA cross section and the BB cross section of FIG. 5. FIG. 9 is a schematic cross section of the chuck insertion fixing portion. Fig. 10 (a) Schematic perspective view of gusset bag with chuck (b) Chuck removal of gusset bag Schematic cross-sectional view of only part EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Gusset bag with a chuck 2 Soft packaging material 3 Folding part 4 Top seal 5 Bottom seal 6 Chuck 7 Male side member 8 Female side member 10 Soft packaging material roll 11 Forming part 13 Opening 21 Chuck insertion fixing part 23 Bag seal part 24 Chuck roll 25 Chuck Inserting Device 26 Chuck Sealing Device 28 Chuck Guides 29, 30, 31 Feed Roll 33 Pusher 35 Cutter 40, 42, 44 Heat Seal Bar 50 Filling Device

Claims (2)

For a chuck that is continuously inserted into the gusset-shaped soft packaging material from the opening of the side portion, while forming a gusset-like shape with the side portion open while feeding continuous soft packaging material in the longitudinal direction In the part which is a guide and includes a bottom wall and a top wall provided with a groove for supporting the upper and lower surfaces of the chuck and passing a guide protrusion formed on the chuck, and inserted into the flexible packaging material, The chuck is inserted using the chuck guide configured such that the bottom wall and the top wall support only approximately half of the entire width of the chuck and the remaining portion is exposed , and is exposed from the bottom wall and the top wall of the chuck. heating the portion is from the top of the flexible packaging, pressurized welded to flexible packaging facing it the chuck, then the line seals and side seal regions to be the top or bottom of the bag Bag-making method of the bag with zipper, characterized in that. For a chuck that is continuously inserted into the gusset-shaped soft packaging material from the opening of the side portion, while forming a gusset-like shape with the side portion open while feeding continuous soft packaging material in the longitudinal direction In the part which is a guide and includes a bottom wall and a top wall provided with a groove for supporting the upper and lower surfaces of the chuck and passing a guide protrusion formed on the chuck, and inserted into the flexible packaging material, The chuck is inserted using the chuck guide configured such that the bottom wall and the top wall support only approximately half of the entire width of the chuck and the remaining portion is exposed, and is exposed from the bottom wall and the top wall of the chuck. The heated part is heated and pressed from the top of the soft wrapping material, and the chuck is welded to the soft wrapping material facing it. , Then, it supplies the soft packaging material in the filling process, then cut into individual bags, filled with contents, bag-making method of filling bags with zipper, characterized in that to seal the opening of the bag.

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