JP4644048B2 - Vertical bag making and filling machine - Google Patents

Description

  The present invention relates to a vertical bag making and filling machine for producing a packaging bag having various easy-opening properties such as a pillow bag, and preferably forms a tearing portion in a side seal portion of the packaging bag on one surface. The present invention relates to a vertical bag making and filling machine for a packaging bag in which a slit is provided in a provided palm seal portion to facilitate opening.

2. Description of the Related Art Conventionally, as this type of packaging bag that contains and seals food and the like, a pillow bag with a zipper having a high sealing property formed by heat-sealing three sides of a bottom portion, an upper opening, and a joint seal portion is widely used. This type of pillow bag can impart properties such as moisture resistance, light shielding properties, gas barrier properties, and puncture resistance depending on the type of contents. The film as the packaging material is configured by laminating a base film layer, an intermediate film layer, a sealant layer, and the like, and the film configuration is appropriately selected according to the type of contents. Therefore, the pillow bag can be a tough laminated resin film-like soft packaging bag having excellent storage stability depending on the contents.
Since such a packaging bag is tough, it is not easy to open with bare hands, and particularly when it has a palm seal part where the backs of both side edges of the film are palms, the strength of the palm seal part is particularly high. For this reason, it was not easy to tear the packaging bag in a direction orthogonal to this and open the packaging bag.
As a means for improving such a problem, Patent Document 1 describes that a perforation is provided in a film constituting a palm seal portion located on a planned cutting line of the pillow bag, and the left and right edges of the pillow bag are joined with the palm. It is described in Patent Document 2 that a notch is formed in a seal portion, and a rough surface portion for opening is formed on the left and right edges of the pillow bag and the base of the joint seal portion to form an opening introduction portion. It is described in.
Moreover, in patent document 4, the perforation for cut | disconnecting a pillow bag laterally in the zipper upper part is formed over the full length direction of a packaging bag across a palm seal part, and a perforation and a zipper A weak seal is provided between them to ensure sealing performance.
JP-A-8-91392 JP-A-11-263374 JP 2000-103437 A JP 2003-246332 A

However, in the packaging bags described in Patent Documents 1 and 2, the perforations and notches provided in the palm seal portion are not in close contact with the pillow bag body, and the pillow bag body is soft and flexible, so The ability to tear the seal portion was not sufficiently transmitted, and good easy-openability could not be exhibited. Moreover, in the packaging bag of patent document 3, since the direction of the force which tears a palm seal part advances from the base of a palm seal part to the side end direction, it will act also as a force which peels a palm seal part, and a palm seal There was a drawback that the cutting line could be cut off due to the separation of the palm seal part because the part could not be cut cleanly.
Further, the packaging bag described in Patent Document 4 has no sealing property due to the perforation formed in the full width in the lateral direction of the packaging bag, and the sealing property of the weak seal part is significantly inferior to that of a normal packaging bag. However, the sealing function cannot be fully exhibited.

  In view of such circumstances, the present invention provides a vertical bag making and filling machine that can manufacture a packaging bag that can exhibit sufficient sealing performance and good opening performance even if it has a palm seal part. The purpose is to provide.

The vertical bag making and filling machine according to the present invention includes a palm seal part and a bottom part formed by transporting a packaging material along a bag making cylinder and forming it into a substantially cylindrical shape, with the back surfaces of both sides of the packaging material coming into contact with each other and welding. A vertical bag making and filling machine that forms a sealing bag and an opening sealing portion, and manufactures a packaging bag in which a side sealing portion and a palm sealing portion in the vicinity of the opening sealing portion are cut and cut. A vertical sealer that forms a joint seal part of the packaging material, a cut forming means that forms a cut at a position opposite to the tear part of the joint seal part, and a joint seal part that tilts the joint seal part on the surface of the packaging bag It means and a first region welding means for welding the first region located on the opening seal portion side of the rafter seal portion against the cut on the surface of the packaging bag, situated at the bottom seal portion side of the rafter seal portion against cuts Welding the second area to the surface of the packaging bag A two-region welding means, and a sealing agent is applied to the surface of the packaging bag in a partial range including the first region and the second region of the joint seal portion, and the second region welding means with respect to the joint seal portion Set the welding pressure to the extent that the backs of the packaging bags do not weld ,
The second region welding means is connected to the first region welding means via a heat transfer suppressing member .
According to the present invention, the first region and the second region are welded to the surface of the packaging bag with the gap of the joint seal portion interposed therebetween, so that it can be easily opened by tearing through the slit from the tear portion of the side seal portion of the packaging bag. A packaging bag that can be obtained is obtained, and the welding pressure of the second region welding means is set to such an extent that the back surfaces of the packaging bag are not welded at the time of welding in the second region, thereby preventing the back surfaces of the packaging bag from being welded together. Thus, the second region of the joint seal portion and the surface of the packaging bag can be welded.
Further, since the second region welding means is connected to the first region welding means via the heat transfer suppression member, the second region welding means reduces the heating temperature of the first region welding means by the heat transfer suppression member. In addition, since the second region of the joint seal portion of the packaging bag is welded at a relatively low heating temperature, it is possible to weld the second region and the surface of the packaging bag by preventing welding of the back surfaces of the packaging bag.
The first area welding means may weld the first area at the same position as the opening seal portion of the packaging bag. When welding at different positions, the first area welding means is the second area welding means. The same welding pressure is obtained.

The vertical bag making and filling machine according to the present invention includes a palm seal part and a bottom part formed by transporting a packaging material along a bag making cylinder and forming it into a substantially cylindrical shape, with the back surfaces of both sides of the packaging material coming into contact with each other and welding. A vertical bag making and filling machine that forms a sealing bag and an opening sealing portion, and manufactures a packaging bag in which a side sealing portion and a palm sealing portion in the vicinity of the opening sealing portion are cut and cut. A vertical sealer that forms a joint seal part of the packaging material, a cut forming means that forms a cut at a position opposite to the tear part of the joint seal part, and a joint seal part that tilts the joint seal part on the surface of the packaging bag Means and a perimeter cut welding means for welding the periphery of the cut in the joint seal portion to the surface of the packaging bag, and the surface of the packaging bag has a sealing agent in a partial range including the periphery of the cut in the joint seal portion. Is applied and cut Was set so that the welding pressure for rafter seal portion around the welding means back surface between the packaging bag is not welded, the cut around the welding means through the heat transfer suppressing member, the opening seal portion side of the rafter seal portion against the cut The first region located is connected to a first region welding means for welding to the surface of the packaging bag .
According to the present invention, by welding the periphery of the cut of the palm seal part to the surface of the packaging bag, a packaging bag that can be easily opened by tearing through the cut from the tear part of the side seal part of the packaging bag is obtained. By setting the welding pressure for the joint seal part of the perimeter seam sealing means to such an extent that the back surfaces of the packaging bag are not welded to each other, it is possible to prevent the back surfaces of the packaging bag from being welded to each other. Can be welded to the surface.
Further, since the perimeter cut welding means is connected to the first region welding means via the heat transfer suppressing member, the cut perimeter welding means is a comparison in which the heating temperature of the first region welding means is reduced by the heat transfer suppressing member. Since the periphery of the cut of the palm seal portion of the packaging bag is welded at a low heating temperature, it is possible to weld the periphery of the slit of the palm seal portion and the surface of the packaging bag by preventing welding of the back surfaces of the packaging bag.

The vertical bag making and filling machine according to the present invention includes a palm seal part and a bottom part formed by transporting a packaging material along a bag making cylinder and forming it into a substantially cylindrical shape, with the back surfaces of both sides of the packaging material coming into contact with each other and welding. A vertical bag making and filling machine that forms a sealing bag and an opening sealing portion, and manufactures a packaging bag in which a side sealing portion and a palm sealing portion in the vicinity of the opening sealing portion are cut and cut. A vertical sealer that forms a joint seal part of the packaging material, a cut forming means that forms a cut at a position opposite to the tear part of the joint seal part, and a joint seal part that tilts the joint seal part on the surface of the packaging bag It means and a first region welding means for welding the first region located on the opening seal portion side of the rafter seal portion against the cut on the surface of the packaging bag, situated at the bottom seal portion side of the rafter seal portion against cuts Welding the second area to the surface of the packaging bag A two-region welding means and a perimeter cut welding means for welding the periphery of the cut in the joint seal portion to the surface of the packaging bag, and the surface of the packaging bag is provided with the first region to the second region of the joint seal portion. The sealing agent is applied to a partial area including the second region welding means and the welding pressure for the joint seal portion of the second region welding means and the perimeter cut welding means is set to such an extent that the back surfaces of the packaging bags are not welded to each other. The cut periphery welding means is connected to the first region welding means via a heat transfer suppressing member .
According to the present invention, the perimeter of the joint seal part and the first and second regions on both sides thereof are welded to the surface of the packaging bag so that the tear is cut from the tear part of the side seal part of the packaging bag. A packaging bag that can be easily opened is obtained, and the welding pressure of the surrounding area welding means and the second area welding means is set to be weak so that the back surfaces of the packaging bags are prevented from being welded to each other, and the periphery of the gap in the joint seal part And the 2nd field and the surface of a packaging bag can be welded.
Further, since the second region welding means and the cut-periphery welding means are connected to the first region welding means via a heat transfer suppressing member, the second region welding means and the cut-periphery welding means are connected by the heat transfer suppressing member. In order to weld the circumference of the cut of the joint seal part of the packaging bag and the second region at a relatively low heating temperature in which the heating temperature of the one-region welding means is reduced, it is possible to prevent the backs of the packaging bag from being welded to each other, It is possible to weld the periphery and the second region of the part and the surface of the packaging bag.

Moreover, the packaging bag may be equipped with the zipper which can be opened and closed on the back surface.
The second region welding means can simultaneously weld the second region of the joint seal portion to the front surface of the packaging bag and the zipper to the rear surface of the packaging bag. In this case, the second region welding means does not have to make the welding pressure smaller than the welding pressure of the first region welding means, and the back surfaces of the packaging bags are prevented from being welded together when the zippers contact each other.
In addition, an elastic member may be provided on at least one of the sealing surfaces of the second region welding unit or the cut periphery welding unit.
Thereby, the welding pressure with respect to the packaging bag of the 2nd area | region welding means or the circumference | surroundings welding means is set to such an extent that the back surfaces of a packaging bag do not weld.

According to the vertical bag making and filling machine according to the present invention, the first and second regions of the palm seal portion or / and the periphery of the cut are welded to the surface of the packaging bag, so that the side seal portion of the packaging bag can be separated from the cut portion. A packaging bag that can be easily opened by tearing the palm seal portion through the cut, and preventing the welding of the back surfaces of the packaging bag during the second region or the welding process around the cut, the above required region of the palm seal portion. Only the surface of the packaging bag can be welded.
Further, when the second region welding means is connected to the first region welding means via the heat transfer suppressing member, the second region welding means sets the heating temperature of the first region welding means by the heat transfer suppressing member. Since the packaging bag and the second region of the palm seal portion are welded at a relatively low heating temperature that is reduced, it is possible to weld the second region and the surface of the packaging bag by preventing welding of the back surfaces of the packaging bag.
In addition, when the perimeter cut welding means is connected to the first region welding means via the heat transfer suppressing member, the cut periphery welding means reduces the heating temperature of the first region welding means by the heat transfer suppressing member. Further, since the periphery of the cut of the joint seal portion of the packaging bag is welded at a relatively low heating temperature, it is possible to weld the periphery of the cut of the joint seal portion and the surface of the packaging bag by preventing welding of the back surfaces of the packaging bag.
In addition, when the second region welding means and the cut periphery welding means are connected to the first region welding means via the heat transfer suppressing member, the second region welding means and the cut periphery welding means are the heat transfer suppressing member. In order to weld the periphery of the cut of the joint seal part of the packaging bag and the second region at a relatively low heating temperature that reduces the heating temperature of the first region welding means, it is possible to prevent the back surfaces of the packaging bags from being welded to each other. The periphery and the second region of the joint seal portion can be welded to the surface of the packaging bag.

Hereinafter, a vertical bag making and filling machine according to an embodiment of the present invention will be described with reference to FIGS. 1 is a plan view of a bag with a zipper, FIG. 2 is a schematic configuration diagram of a vertical bag making and filling machine, FIG. 3 is a horizontal sectional view of a vertical sealer, FIG. 4 is a front view of the vertical sealer, and FIG. 6 is a side view of the vertical sealer, FIG. 7 is a plan view of the main part showing the horizontal sealer, FIG. 8 is a view taken in the direction of arrow A in FIG. 7, and FIG. FIG. 10 is a view showing a cut periphery welding means, and FIG. 10 is a view showing a cutter and a side cut portion cutter.
A zippered bag 1 shown in FIG. 1 shows a pillow packaging bag manufactured by a vertical bag making and filling machine according to this embodiment. The zippered bag 1 has, for example, a substantially rectangular shape in plan view in which a sheet-like film f (wrapping material) is cut to make a bag. In the film f, the back surface (inner surface) of the bag 1 is a sealant layer having heat sealability, and the surface is a layer having no heat sealability.
The upper part of the bag 1 is sealed with an upper horizontal seal part 2 (opening seal part), the lower part is sealed with a bottom horizontal seal part 3 (bottom part seal part), and the back of the bag 1 is further joined with the backs of the opposite sides of the film f. Sealed by the seal portion 4. In addition, a flange portion 5a having a concave zipper as a zipper 5 and a flange portion 5b having a convex zipper are welded to the opposite back surfaces 1a and 1b in the bag 1, respectively. The concave zipper and the convex zipper The inside of the bag 1 is sealed by being detachably fitted to each other.

A tear portion 7 is formed in one side portion of the upper lateral seal portion 2 in the lateral direction, and the periphery of the tear portion 7 constitutes a side seal portion 8 in which the heat seal surfaces of the back surfaces 1a and 1b are sealed. ing. The side seal portion 8 is formed in the vertical direction along one side of the bag 1 and is connected to the upper horizontal seal portion 2.
Further, in the joint seal portion 4, one or a plurality of cuts 9 (three in the example shown in the figure) are cut at a predetermined interval in a region between the upper horizontal seal portion 2 and the zipper 5, and these cuts 9 are cut portions. 7 is formed at a position opposite to the lateral direction and ends at a position that does not reach the root from the side edge of the palm seal portion 4. Therefore, the periphery of the three cuts 9 is also sealed. The first region 4A and the second region 4B where the joint seal portion 4 overlaps the upper lateral seal portion 2 and the zipper 5, respectively, and the third region 4C including the periphery of the cut 9 between the upper lateral seal portion 2 and the zipper 5 are defined. The bag 1 falls to the side of the cut portion 7 of the bag 1 and is welded to the surface.
Therefore, when opening the bag 1, a tear is made from the tearing portion 7, and the bag 1 is completely opened laterally through the slit 9 of the palm seal portion 4. Thereafter, the bag 1 is opened and closed by the zipper 5.

Next, a vertical bag making and filling machine 11 for manufacturing such a bag 1 will be described with reference to FIGS.
In the vertical bag making and filling machine 11 shown in FIG. 2, for example, bag making tubes 12 (bag making cylinders) having a substantially circular cross section (may be a substantially square cross section) are arranged in the vertical direction. A hopper 13 is provided at the upper end of the bag making tube 12 for supplying the contents to be filled in the bag 1 to be made. A bag making guide 14 is attached below the hopper 13. Between the outer peripheral surface of the bag-making tube 12 and the inner peripheral surface of the bag-making guide 14, a substantially circular space in plan view through which the film f (packaging material) passes is provided.
A film roll 15 for winding a sheet-like film f is provided on the side of the bag-making tube 12, and the film f fed out from the film roll 15 is placed in the width of the film f by the zipper temporary attaching means 16. Pasted in the direction. And then. The film f is bent by the bag making guide 14 and formed into a cylindrical shape through the space between the bag making tube 12. In addition, the film f becomes a substantially cylindrical packaging tube f by the bag making guide 14, and the back surfaces of both end portions in the width direction are brought into contact with each other to form the palm seal portion 4 and conveyed.

In the bag-making tube 12, a film f formed in a substantially cylindrical shape along the outer peripheral surface of the bag-making tube 12 is intermittently adsorbed to the outer peripheral surface of the bag-making tube 12 by air. A pair of feeding belts 17 are provided for transporting downward. A vertical sealer 19 for heat welding (heating seal) is provided between the pair of feeding belts 17 and 17, and the vertical sealer 19 includes three pieces in the third region 4 </ b> C of the joint seal portion 4. A cut adding means 20 for forming the cut 9 is provided.
Further, on the lower side of the bag making tube 2, a horizontal sealer 22 is provided that thermally welds the upper and lower parts of the bag 1 individually in the horizontal direction. Between the horizontal sealer 22 and the vertical sealer 19, there is disposed a tilt guide 23 having a substantially L-shape in side view for tilting the palm seal portion 4 which is sealed with the vertical sealer 19 onto the surface of the bag 1. . Further below the horizontal sealer 22, zipper book attaching means 24 is provided for welding the flange portions 5 a and 5 b of the zipper 5 temporarily attached to both back surfaces 1 a and 1 b of the bag 1 that has been made.
The cut adding means 20 is provided in the movable heater block 27 at a position that is an integral multiple of the bag length of the bag 1 from the horizontal sealer 22 and a distance from the bag lower end to the cut 9.

The vertical bag making and filling machine 11 according to the present embodiment has the above-described configuration. Next, the detailed structure will be described with reference to FIGS.
3 to 5, the vertical sealer 19 includes a fixed heater block 26 and a movable heater block 27 that are disposed substantially parallel to the bag-making tube 2, and a heater surface 26 a of the fixed heater block 26 and the movable heater block 26. The joint seal part 4 of the film f surrounding the bag-making tube 2 is sandwiched by the heater surface 27a of 27, and heat welding is performed.
These fixed and movable heater blocks 26 and 27 are held by a U-shaped base portion 28 (see FIG. 3), and the base portion 28 is attached to a plate-shaped holder 29 so that its position can be adjusted in the XY direction. (See FIG. 4). A fixed heater block 26 is fixed to one side of the base 28, and a movable heater block 27 is slidably held on a rod 31 provided between both sides. The movable heater block 27 is connected to an opening / closing cylinder 32 provided on one side of the base portion 28, and is opened / closed with respect to the fixed heater block 26 by sliding on the rod 31 by the cylinder 32.
A position adjusting mechanism 33 for adjusting the positions of the fixed and movable heater blocks 26 and 27 in the XY direction is provided in the concave portion on the back surface of the holder 29 via the base portion 28. An abutting plate 34 for adjusting the position of the base 28 is fixed to the holder 29 with screws so that the position can be adjusted.

3 and 4, in the break adding means 20 provided in the movable heater block 27, three cutter blades 36 are arranged below the heater surface 27 a along the conveyance direction of the joint seal portion 4. The three cutter blades 36 protrude forward and upward from the heater surface 27a of the movable heater block 27 (see FIGS. 3 and 4), and are sandwiched between guide plates 37a, 37b, 37b, and 37c having predetermined thicknesses, respectively. The guide plates 37b, 37b, and 37c are fitted into recesses on the surface and fixed with bolts or the like. Further, in the position facing each cutter blade 36 of the fixed heater block 26, a concave groove 38 is formed in the heater surface 26a.
Therefore, when the movable heater block 27 moves to the fixed heater block 26 side and sandwiches the palm seal portion 4 with the heater surfaces 27a and 26a and heat-welds, the cutter blades 36 use the free edge of the palm seal portion 4 to move. Three cuts 9 are formed by notching, and each cutting edge is stored in the concave groove 38 of the fixed heater block 26. The break adding means 20 can be adjusted in position in the feed direction by the position adjusting mechanism 33 according to the bag length.
5 and 6, an L-shaped holder 41 is attached to the lower end of the fixed heater block 26. A guide plate 40 is provided on the L-shaped holder 41 through a hinge so as to be opened and closed with a slight gap between the fixed heater block 26 and the extended surface of the heater surface 26a. The joint seal portion 4 is lowered along the extended surface through the gap between the extended surface and the guide plate 40. A rod 44 is attached to the L-shaped holder 41. Further below the guide plate 40, an air blowing portion 42 for tilting the joint seal portion 4 to one side of the bag 1 is provided on a rod 44 whose position can be adjusted in the vertical direction. The air blowing portion 42 is provided with an opening 43a of a pipe 43 that supplies air from an air supply source (not shown) at a position facing the palm seal portion 4, so that the palm seal portion 4 is tilted by air.
The rod 44 is connected to the above-described tilting guide 23 having an approximately L shape in side view so that the position of the rod 44 can be adjusted in the vertical direction, and the palm seal portion 4 tilted obliquely by the air from the opening 43a is guided to the tilting guide 23. Then, it is brought down so as to contact the surface of the packaging cylinder f that has passed through the bag-making tube 12.

Next, the horizontal sealer 22 located below the bag-making tube 12 will be described with reference to FIGS.
FIG. 7 is a plan view of the horizontal sealer 22 in which the first and second heater blocks 46 and 47 are arranged to face each other, and both (or either) the heater blocks 46 and 47 are horizontal. By moving forward and backward in the direction, the packaging tube 1 is clamped or separated in the horizontal direction. The upper horizontal seal part 2 of the preceding packaging cylinder 1 and the bottom horizontal seal part 3 of the subsequent packaging cylinder 1 are heat-welded at the same time in a state where the heater blocks 46 and 47 are sandwiched and pressed. As shown in FIGS. 7 to 9, the heater surfaces 46a and 47a of both heater blocks 46 and 47 are formed with concave grooves 48 and 49 that divide the heater surface into two parts, respectively. Of the heater surfaces 46 a and 47 a, the substantially L-shaped portions below the concave grooves 48 and 49 are the heater surfaces 46 ab and 47 ab for forming the upper horizontal seal portion 2 and the heaters for forming the side seal portion 8. The surfaces 46ac and 47ac are configured.
As shown in FIG. 7, a cutter 50 is provided in a recessed groove 48 of the first heater block 46 so as to be able to advance and retreat. The cutter 50 is connected to a cutter cylinder 52 via a shaft portion 51 and operates in a state where the heater surfaces 46a and 47a of both heater blocks 46 and 47 sandwich the packaging cylinder 1 and are laterally sealed. By entering the recessed groove 49 of the heater block 47, the horizontal seal portion of the packaging cylinder 1 is divided into the upper horizontal seal portion 2, the side seal portion 8, and the bottom horizontal seal portion 3.

As shown in FIGS. 8 and 10, the heater surfaces 46a and 47a of the heater blocks 46 and 47 are substantially L-shaped, respectively, and the sub-grooves are formed in the narrow portions below the concave grooves 48 and 49, respectively. 54 and 55 are formed. One sub-groove 54 is provided with a sub-cutter 56 for forming the slit 7. The sub cutter 56 and the cutter 50 disposed in the concave groove 48 protrude outward from one end of the first heater block 46 and are connected via a connecting portion 57.
Therefore, at the time of clamping the heater surfaces 46a and 47a, the side seal portion 8 is welded to the bag 1 at the narrow portion of the heater surfaces 46a and 47a, and the auxiliary cutter 56 is also advanced and retracted together with the advance and retreat of the cutter 50. The slit 7 is formed in the side seal portion 8 by entering the sub-groove 55 of the second heater block 47.

Further, on the lower surface of the center part in the longitudinal direction of each heater block 46, 47, a heater around the cut for heating and welding the third region 4 C including the periphery of the cut 9 of the palm seal part 4 in contact with the surface of the bag 1. Heads 60 and 61 (intersection welding means) are provided facing each other. Each of the heater heads 60 and 61 is connected to a connecting portion with the heater blocks 46 and 47 by bolts or the like via heat transfer suppressing members 62 and 63. Thus, the heating temperature of the heater heads 60 and 61 transmitted from the heater blocks 46 and 47 is set to a relatively low temperature. Moreover, the heater surfaces 60a and 61a that sandwich the third region 4C of the heater heads 60 and 61 are made of an elastic member such as rubber.
Due to the heat transfer suppressing members 62 and 63 of the heater heads 60 and 61 and the heater surfaces 60a and 61a of the elastic members, the heating temperature and the sealing pressure for heat welding the third region 4C are weaker than those of the heater blocks 46 and 47. Set. Thus, only the third region 4C of the joint seal portion 4 and the surface of the bag 1 are thermally welded, and control is performed so that the back surfaces of the bag 1 are not thermally welded.
The zipper main attaching means 24 attaches and welds the flank portions 5a and 5b of the zipper 5 temporarily attached to the back surfaces 1a and 1b of the bag 1 and attaches the second region 4B of the joint seal portion 4 to the surface of the bag 1. 2nd area welding means to weld to is comprised. The welding pressure of the zipper main attachment means 24 may be equivalent to the heater surfaces 46ab and 47ab of the horizontal sealer 22.

The vertical bag making and filling machine 11 according to the present embodiment has the above-described configuration. Next, a method for manufacturing the bag 1 will be described.
The belt-like film f fed out from the film reel 15 is supplied to the vertical bag making and filling machine 11 via a dancer roll, and immediately before that, the zipper 5 is placed in the width direction of the film f. Tentatively. Further, in order to weld the joint seal part 4 to the surface of the bag 1, one side of the surface of the film f has a first to first width of about 1.5 to 5.0 times the width of the joint seal part 4, for example. A sealant is applied over the length of the two regions 4A, 4B. This sealing agent is applied intermittently in the length direction of the belt-like film f with the length of the packaging bag 1 as one cycle.

The film f is inserted between the bag making tube 12 and the bag making guide 14 of the vertical bag making and filling machine 11 and formed into a substantially cylindrical packaging tube f around the bag making tube 12. The packaging cylinder f is intermittently delivered below the bag-making tube 2 by a pair of delivery belts 17 and 17, and both ends of the packaging cylinder f are brought into contact with each other so as to be in contact with each other.
When the packaging cylinder f is stopped, the palm seal part 4 before welding is positioned between the fixed heater block 26 and the movable heater block 27 of the vertical sealer 19 in the open state as shown in FIGS. 3 and 4. From this state, the open / close cylinder 32 is driven to slide the movable heater block 27 along the rod 31 so that the joint seal portion 4 before welding is clamped between the heater surfaces 26a and 27a. And heat welding.
At this time, as the movable heater block 27 slides in the direction of the fixed heater block 26, the three cutter blades 36, 36, 36 provided in the cut imparting means 20 move together, and the third region of the palm seal portion 4. Cuts 9, 9, and 9 are made in 4C at predetermined intervals, and enter into the respective concave grooves 38, 38, and 38 of the fixed heater block 27.
As a result, thermal welding of the joint seal portion 4 and formation of the cut 9 can be performed simultaneously.

Next, in the packaging cylinder f further conveyed by the feeding belts 17 and 17, the joint seal part 4 moves along the heater surface 26a of the fixed heater block 26, and as shown in FIGS. Passes between the plates 40. Then, air is blown from the opening 43a of the air blowing portion 42 located on the downstream side of the guide plate 40 to the opposing palm seal portion 4 so that the palm seal portion 4 is tilted to one surface side of the packaging tube f. Further, the joint seal portion 4 is further tilted by the tilting guide 23 having a substantially L shape in side view and pressed against the surface of the packaging tube f (see FIG. 6).
The packaging tube f is sent below the bag-making tube 2 and is laterally sealed by the lateral sealer 22. That is, the first and second heater blocks 46 and 47 slide in the contact direction with the packaging cylinder f interposed therebetween, and the packaging cylinder f is sandwiched between the heater surfaces 46a and 47a. And by heat-welding, the packaging cylinder f is heat-sealed with the top side seal part 2, the side part seal part 8, and the bottom side seal part 3.

The first region 4 </ b> A of the joint seal portion 4 is also welded to the surface of the bag 1 by the heater surfaces 46 ab and 47 ab forming the upper horizontal seal portion 2. At the same time, the third region 4C of the palm seal portion 4 is also welded to the surface of the packaging cylinder f by sandwiching the packaging cylinder f including the packaging cylinder f by the heater heads 60 and 61 and performing thermocompression bonding. At this time, since the heater heads 60 and 61 around the cut are connected to the first and second heater blocks 46 and 47 via the heat transfer suppressing members 62 and 63, respectively, the heat temperature is changed to the first and second heater blocks 46. 47, and the sealing pressure is small because the packaging tube f and the joint seal part 4 are pressed by the heater surfaces 60 and 61 of the elastic members.
Therefore, the third region 4C of the joint seal part 4 and the surface of the packaging tube f are heat-sealed, but the back surfaces of the packaging tube f are not thermally welded.
Below the horizontal sealer 22, the flange portions 5 a and 5 b of the zipper 5 temporarily attached to the back surfaces 1 a and 1 b in the bag are attached by welding by a pair of heater blocks of the zipper book attaching means 24. At the same time, the second region 4B of the joint seal part 4 is also welded to the surface of the bag 1.
The flange portions 5a and 5b of the zipper 5 are coated with a sealant on the surface contacting the back surface of the bag 1, and are not coated on the opposite surface. Therefore, the flange portions 5a and 5b are not welded by the thermal welding of the zipper main attachment means 24.

Next, by operating the cutter cylinder 52, the cutter 50 and the sub-cutter 56 move together in the concave groove 48 and the sub-groove 54, and the cutter 50 uses the horizontal seal portion as the upper horizontal seal portion 2 and the side seal. The cut portion 7 is formed in the side seal portion 8 by the sub cutter 56. The cutter 50 and the secondary cutter 56 enter the concave groove 49 and the secondary concave groove 55 of the second heater block 47. In addition, the tearing part 7 is formed in the side which defeats the palm seal part 4 of the bag 1 (refer FIG. 1).
Then, the preceding bag 1 with the upper horizontal seal portion 2 is manufactured, and the packaging tube f sealing the subsequent bottom horizontal seal portion 3 is filled with the contents through the bag making tube 12 inserted therein. To do. Further, the packaging cylinder f is lowered by the feeding belt 17, the palm seal portion 4 is formed by the vertical sealer 19, and the upper horizontal seal portion 2 and the bottom horizontal seal portion 3 are formed by the horizontal sealer 22 as described above. The bag 1 is manufactured by repeating such operations.

As described above, in the vertical bag making and filling machine 11 according to the present embodiment, when the bag 1 is manufactured, the palm seal portion 4 is brought down to the cutout portion 7 side of the side seal portion 8 and welded by the heater heads 60 and 61 around the cut line. Therefore, when the bag 1 is opened, any of the cuts 9 of the palm seal portion 4 can be smoothly torn from the tearing portion 7, so that the bag 1 can be opened easily even if the strength of the palm seal portion 4 is high. It looks good without any breaks 9 during transportation.
Further, when welding the joint seal part 4 to the surface of the bag 1, the heater heads 60 and 61 around the cuts set the heating temperature and the sealing pressure to be weak by the heat transfer suppressing members 62 and 63 and the heater surfaces 60a and 61a of the elastic members. Therefore, only the third region 4C of the joint seal part 4 and the surface of the bag 1 are welded, and the back surfaces of the bag 1 are not thermally welded to each other and are easy to open.
Further, since the periphery of the tearing portion 7 is thermally welded by the side seal portion 8 and the periphery of the slit 9 of the joint seal portion 4 is also thermally welded by the vertical sealer 19, the bag 1 is highly sealed.

Next, modified examples of the first embodiment will be described with reference to FIGS. 11 to 14. However, the same or similar parts and members as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.
11 and 12 show a first modification, and the packaging bag 70 shown in FIG. 11 is not provided with the zipper 5. The packaging bag 70 has a first region 4A and a second region which are folded on the surface of the bag 1 and overlap the upper lateral seal portion 2 (located on both sides of the third region 4C including the fold 9). Only 4B is welded to the surface of the packaging bag 70.
In order to manufacture such a packaging bag 70, the first and second heater blocks 46 and 47 shown in FIG. The heater blocks 46 and 47 have the lower heater surfaces 46ab and 47ab sandwiching the grooves 48 and 49 in the heater surfaces 46a and 47a, and heat the upper side seal portion 2 and the side seal portion 8 and the first region 4A simultaneously. The 1st area | region welding means to weld is comprised.
And the 2nd area | region heater blocks 71 and 72 for heat-welding the 2nd area | region 4B of the palm seal part 4 are provided under the heater blocks 46 and 47. As shown in FIG. The heater surfaces 71a and 72a (second region welding means) of the second region heater blocks 71 and 72 are each formed by an elastic member. As a result, the welding pressure by the heater surfaces 71a and 72a is set to be smaller than the welding pressure of the first and second heater blocks 46 and 47, and the second region 4B to which the sealant is applied in the thermal welding of the joint seal portion 4 and the packaging Only the front surface of the bag 70 is welded and the back surfaces of the packaging bag 70 are not welded to each other.

  According to the first modified example, when the packaging bag 70 is manufactured, the first region 4A of the joint seal portion 4 is heat-welded integrally with the upper lateral seal portion 2 by the heater surfaces 46ab and 47ab of the lateral sealer 22, and the second region 4B is thermally welded by the heater surfaces 71a and 72a of the second area heater blocks 71 and 72, and the back surfaces of the packaging bag 70 are not welded to each other. Therefore, when the packaging bag 70 is opened, the third region 4C including the cut 9 is not welded, but the first and second regions 4A and 4B on both sides thereof are welded, so the cut 9 is in close contact with the bag 1. Thus, it can be easily opened from the slit portion 7 through any cut 9 of the palm seal portion 4.

Next, a second modification will be described with reference to FIGS.
The packaging bag 75 shown in FIG. 13 is also not provided with the zipper 5. In this packaging bag 75, the palm seal portion 4 is folded to the surface of the bag 1, and the first region 4A, the second region 4B, and the third region 4C including the cut 9 are opened with a slight gap (even if not opened). Good) Separated and welded to the surface of the packaging bag 75.
In order to manufacture such a packaging bag 75, the heater surfaces 46ab and 47ab of the first and second heater blocks 46 and 47 as the horizontal sealer 22 are thermally welded to the upper horizontal seal portion 2 and the first region 4A at the same time. A region welding means is constituted.
Below the heater blocks 46 and 47, heater blocks 76 and 77 for heat-welding the third area 4C and the second area 4B including the cut 9 of the palm seal portion 4 are provided. In the third area 4C, the peripheral area heater surfaces 76a and 77a (intermediate area welding means) for thermally welding the periphery of the incision 9 in the third area 4C, and the second area heater surface 76b for thermally welding the second area 4B. 77b (second region welding means) are formed by elastic members.
Thereby, the welding pressure by each heater surface 76a, 77a, 76b, 77b is set to be smaller than the welding pressure of the first and second heater blocks 46, 47, and the sealant is applied at the time of thermal welding of the joint seal portion 4. Only the surfaces of the second region 4B and the packaging bag 75 and the third region 4C and the surface of the packaging bag 75 are welded, and the back surfaces of the packaging bag 75 are not welded.

  According to the second modified example, when the packaging bag 75 is manufactured, the first region 4A of the joint seal portion 4 is thermally welded integrally with the upper lateral seal portion 2 by the heater surfaces 46ab and 47ab of the lateral sealer 22, and the third region. 4C and the second region 4B are thermally welded by the heater surfaces 76a and 77a of the second region heater blocks 76 and 77 and the heater surfaces 76b and 77b, and the back surfaces of the packaging bag 70 are not welded to each other. Therefore, when the packaging bag 75 is opened, the packaging bag 75 can be easily opened through any one of the slits 9 of the split seal portion 4.

  In the vertical bag making and filling machine 11 according to the first embodiment, a sealing agent may be applied so that only the third region 4 </ b> C around the gap of the joint seal part 4 is welded to the surface of the bag 1. Alternatively, the sealing agent may be applied so that only the first region 4A and the third region 4C, and only the third region 4C and the second region 4B are welded to the surface of the bag 1. In this case, no sealing agent is applied to the surface of the bag 1 corresponding to the second region 4B or the first region 4A of the joint seal portion 4 that is not welded to the surface of the bag 1.

It is a top view of the bag with a zipper by embodiment of this invention. It is a principal part perspective view of the vertical bag making and filling machine by embodiment of this invention. It is a horizontal direction sectional view of a vertical sealer. It is a front view of the vertical sealer shown in FIG. It is horizontal direction sectional drawing which shows a vertical sealer and an air blowing means. It is a side view which shows the film packaging cylinder wound by the vertical sealer and the bag making tube. It is a principal part top view which shows the heater block of a horizontal sealer in a separated state. It is an A direction arrow directional view of FIG. It is a side view which shows the heater block of a horizontal sealer, and a break surrounding heater head. It is a side view which shows the heater block of a cutter, a side part cut cutter, and a horizontal sealer. It is a fragmentary top view of the bag with a zipper by a 1st modification. It is a side view which shows the heater block and 2nd area | region heater block of the horizontal sealer of the vertical bag making and filling machine by a 1st modification. It is a partial top view of the bag with a zipper by a 2nd modification. It is a side view which shows the horizontal sealer and heater block of the vertical bag-making filling machine by a 2nd modification.

Explanation of symbols

1, 70, 75 bags (packaging bags)
2 Upper horizontal seal (opening seal)
3 Bottom horizontal seal (bottom seal)
4 Joint seal portion 4A First region 4B Second region 4C Third region 5 Zipper 7 Cut portion 8 Side seal portion 9 Cut
DESCRIPTION OF SYMBOLS 11 Vertical bag making and filling machine 12 Bag making cylinder 19 Vertical sealer 20 Break addition means 22 Horizontal sealer 23 Joint seal part fall part (joint seal part fall means)
24 Zipper book fixing means (second area welding means)
42 Air blowing part (joint seal part defeat means)
43a Opening (Melt-up seal part defeat means)
46 1st heater block 47 2nd heater block 46ab, 47ab Heater surface (1st area | region welding means)
60 Heater block around the cut (welding means around the cut)
60a Heater surface (welding means around the cut)
71, 72 Second area heater blocks 71a, 72a Heater surface (second area welding means)
76, 77 Heater block 76a, 77a Heater surface (periphery welding means)
76b, 77b Heater surface (second region welding means)
f Film, packaging cylinder

Claims (5)

The packaging material is conveyed along the bag-making cylinder and formed into a substantially cylindrical shape, and a joint seal portion, a bottom seal portion, and an opening seal portion are formed by welding by contacting the back surfaces of both side edges of the packaging material. A vertical bag making and filling machine for producing a packaging bag having a slit and a cut in the side seal part and the palm seal part in the vicinity of the opening seal part,
A vertical sealer that forms a palm seal part of the packaging material;
A cut forming means for forming a cut at a position facing the slit portion of the palm seal portion;
A palm seal part tilting means for tilting the palm seal part on the surface of the packaging bag;
A first region welding means for welding a first region located on the opening seal portion side of the joint seal portion with respect to the cut, to the surface of the packaging bag;
A second region welding means for welding a second region located on the bottom seal part side of the joint seal part with respect to the cut, to the surface of the packaging bag;
A sealing agent is applied to the surface of the packaging bag in a partial range including the first region and the second region of the joint seal part, and the back surface of the packaging bag is welded to the welding pressure of the second region welding means. Set to a level that does not
The vertical bag making and filling machine, wherein the second region welding means is connected to the first region welding means via a heat transfer suppressing member . The packaging material is conveyed along the bag-making cylinder and formed into a substantially cylindrical shape, and a joint seal portion, a bottom seal portion, and an opening seal portion are formed by welding by contacting the back surfaces of both side edges of the packaging material. A vertical bag making and filling machine for producing a packaging bag having a slit and a cut in the side seal part and the palm seal part in the vicinity of the opening seal part,
A vertical sealer that forms a palm seal part of the packaging material;
A cut forming means for forming a cut at a position facing the slit portion of the palm seal portion;
A palm seal part tilting means for tilting the palm seal part on the surface of the packaging bag;
A perimeter cut welding means for welding the periphery of the cut in the joint seal part to the surface of the packaging bag;
A sealant is applied to the surface of the packaging bag in a partial range including the periphery of the gap of the joint seal part, and the welding pressure of the welding means around the slit is set to such an extent that the back surfaces of the packaging bag are not welded to each other. The cut periphery welding means is connected via a heat transfer suppressing member to a first region welding means for welding a first region located on the opening seal portion side of the joint seal portion with respect to the cut to the surface of the packaging bag. A vertical bag making and filling machine. The packaging material is conveyed along the bag-making cylinder and formed into a substantially cylindrical shape, and a joint seal portion, a bottom seal portion, and an opening seal portion are formed by welding by contacting the back surfaces of both side edges of the packaging material. A vertical bag making and filling machine for producing a packaging bag having a slit and a cut in the side seal part and the palm seal part in the vicinity of the opening seal part,
A vertical sealer that forms a palm seal part of the packaging material;
A cut forming means for forming a cut at a position facing the slit portion of the palm seal portion;
A palm seal part tilting means for tilting the palm seal part on the surface of the packaging bag;
A first region welding means for welding a first region located on the opening seal portion side of the joint seal portion with respect to the cut, to the surface of the packaging bag;
A second region welding means for welding a second region located on the bottom seal portion side of the joint seal portion to the cut , on the surface of the packaging bag;
A perimeter cut welding means for welding the periphery of the cut in the joint seal part to the surface of the packaging bag;
The surface of the packaging bag is coated with a sealing agent in a partial range including the first region to the second region of the joint seal part, and the welding pressure of the second region welding means and the perimeter cut welding means is packaged. Set to the extent that the back of the bag does not weld ,
The vertical bag making and filling machine, wherein the second region welding means and the perimeter cut welding means are connected to the first region welding means via a heat transfer suppressing member .     The vertical bag making and filling machine according to any one of claims 1 to 3, wherein the packaging bag includes a zipper that can be opened and closed on a back surface. The vertical bag making and filling machine according to any one of claims 1 to 4 , wherein an elastic member is provided on a sealing surface of at least one of the second region welding means and the cut circumference welding means.

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