JP3831351B2 - Packaging bag manufacturing method and vertical filling and packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical filling and packaging apparatus for producing a packaging bag filled with a filling material by filling the tubular film formed with a sheet-like film into a tubular shape and heat-sealing the tubular film. In particular, the present invention relates to a vertical sealing method and apparatus for forming a tubular film from a sheet-like film.
[0002]
[Prior art]
Conventionally, a sheet-like film is formed into a cylindrical shape by a bag-making guide, and its mating surface is heat-sealed with a vertical sealing device to form a cylindrical film, and a filler is put into the cylindrical film, and the cylindrical shape 2. Description of the Related Art A vertical filling and packaging machine that manufactures a packaging bag filled with a filler by heat-sealing the width direction of a film with a horizontal sealing device and cutting the heat-sealed portion is widely used.
[0003]
Also, for the purpose of shortening the manufacturing time of the packaging bag and ensuring sufficient sealing time, the cylindrical film is continuously fed without stopping the flow of the cylindrical film, and the horizontal sealing device is installed at the same speed as the conveying speed of the cylindrical film. Various so-called box motion type horizontal sealing devices that perform heat sealing while moving the film-like film downstream in the conveyance direction have been disclosed (see, for example, Patent Document 1).
[0004]
As shown in FIG. 7, the vertical filling and packaging machine shown in the same document forms a heat-sealable sheet-like film in a cylindrical shape by a bag making guide 113, and the overlapped portion is a vertical sealing device 110. By vertically heat-sealing in the longitudinal direction, the cylindrical film 160 formed in a cylindrical shape is continuously conveyed downward, and the horizontal sealing device 120 is moved in the box motion type while being continuously heat-sealed in the width direction. This is a device for producing a packaging bag 166 by lateral sealing.
[0005]
Further, in the vertical sealing by the vertical sealing device 110, forms such as envelope sticking (wrap seal) or palm sticking (fin seal) are generally used depending on the film overlapping method. Envelope sticking is a method in which both side edges of a film formed in a cylindrical shape are overlapped with each other and heat-sealed in a state where the inner and outer surfaces of the film are in surface contact. The inner surfaces are heat-sealed so as to be in surface contact with each other.
[0006]
[Patent Document 1]
JP 2000-72104 A
[0007]
[Problems to be solved by the invention]
However, in the vertical filling and packaging machine provided with the box motion type horizontal sealing device as described above, the vertical sealing device is generally fixedly arranged and heat-sealed by sandwiching the continuously conveyed film. Met. That is, since the vertical sealing device performs heat sealing while generating friction with the film, depending on the material of the film or the heat sealing temperature of the vertical sealing device, the formed vertical sealing portion may become dirty or There is a risk of becoming. Moreover, even if it does not become an incomplete seal part, it becomes a cause of malfunction, such as generation | occurrence | production of a wrinkle and a film elongation. In particular, when the width of the vertical seal portion is wide, the frictional resistance between the film and the vertical seal device increases, and such a problem is more likely to occur.
[0008]
By the way, when the strength of the heat-sealed portion is required so that the packaging bag is not easily opened, or when a film that is difficult to heat-weld is used, it is necessary to ensure a sufficient time for heat-sealing. Accordingly, it is desired that the vertical sealing device can efficiently heat-seal the film in a short time by efficiently transmitting energy.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a packaging bag capable of efficiently and neatly forming a vertical seal portion of the packaging bag, and a vertical filling and packaging machine used for the manufacturing.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, the manufacturing method of the packaging bag of the present invention is based on both side edges of the sheet-like film.MutualButOverlapping envelopesA step of forming the film into a cylindrical shape, and transporting the filmBetween the two side edgesHeat-sealing the overlapping portion in a direction along the side edge, forming a cylindrical film having a vertical seal portion formed thereby, charging a filler into the cylindrical film, and filling Heat sealing in the width direction of the cylindrical film charged with an object,Tubular filmCraft to formAboutEquipped with heating meansArranged outside the tubular filmWith heater barInside the tubular filmOpposed to the heater barAnd connected to the heater bar by a connecting member so as to move integrally with the heater bar.While sandwiching the overlapping portion with the receiving member, the heater bar and the receiving member are moved at the same speed as the film conveying speed to the downstream side in the film conveying direction.SaidForm a vertical sealThe
[0011]
  According to the present invention,Folded in the form of an envelopethe filmMutualThe overlapping part of,It is sandwiched between the heater bar and the receiving member, and in this state, heat sealing is performed while moving the heater bar and the receiving member downward at substantially the same speed as the film conveyance speed. Therefore, the heat by the heating means of the heater bar is efficiently transmitted to the film, and good heat sealing can be performed in a short time. Moreover, since the vertical seal portion is formed without rubbing against the heater bar and the receiving member, it becomes more beautiful.
[0012]
  Further, the vertical filling and packaging machine of the present invention has both side edges of a sheet-like film.MutualButOverlapping envelopesA bag making guide for forming the film into a cylindrical shape;Between the two side edgesA vertical sealing device for heat-sealing the overlapping portion in a direction along the side edge and forming a cylindrical film having a vertical sealing portion formed thereby, a film feeding means for conveying the film, and the cylindrical film And a horizontal sealing device for heat-sealing in the width direction of the cylindrical film charged with the filler, and the vertical sealing device includes heating means and the film. A heater bar that moves forward and backward in a direction substantially perpendicular to the conveying direction, a receiving member disposed opposite to the heater bar, and holding the heater bar and the receiving memberforHolding means and drive means for moving the holding means;The holding means is configured to hold the heater bar and move up and down along the transport direction while being disposed inside the cylindrical film and a lifting block that is movable along the transport direction of the film. The connection between the elevating block and the inner main pipe having an inner main pipe that supports the receiving member, and a connecting member that connects the elevating block and the inner main pipe. The part is provided above the upper end of the overlapping part,While holding the overlapping portion between the heater bar and the receiving member, the heater bar and the receiving member are moved to the downstream side in the film transport direction at substantially the same speed as the film transport speed.SaidForm a vertical sealIs.
[0013]
The vertical sealing device of the vertical filling and packaging machine according to the present invention can hold the heater bar and the receiving member by the holding means and move them at the film conveyance speed and the substantially moving speed, and the above-described packaging bag according to the present invention Can be satisfactorily carried out.
[0014]
  Also,The connecting part of the lifting block and the inner main pipe connected by the connecting member isBetween filmsProvided at a position above the upper end of the overlapping partFor,The heater bar and the receiving member can be moved up and down without interfering with the overlapping portion.
[0015]
The drive means for moving the holding means up and down is preferably a servo motor. As a result, driving with accurate operation timing can be obtained. In addition, it is possible to change the vertical movement range of the holding means, that is, the heater bar, only by adjusting the rotation amount of the servo motor.
[0016]
The rotational motion of the servo motor described above may be configured to be converted into a reciprocating linear motion of the holding body via a feed screw mechanism. For example, the drive of the servo motor can be transmitted also by a crank mechanism, but the feed screw mechanism is preferable to the vertical seal device according to the present invention in that the moving range of the heater bar or the like can be easily adjusted.
[0017]
In the present specification, “film” refers to a sheet made of a material that can be welded, and “tubular film” refers to a film that has been heat-sealed and processed into a cylinder by a vertical sealing device. Further, as the film, for example, a resin film such as a laminate film in which nylon, polyethylene, polypropylene, or the like is appropriately bonded according to the purpose may be used.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of an embodiment of the vertical filling and packaging machine of the present invention.
[0019]
A vertical filling and packaging machine 1 according to the present embodiment shown in FIG. 1 includes a vertical sealing device 10 for heat-sealing in the longitudinal direction of a sheet-like film 61, and a squeeze that sandwiches and conveys a cylindrical film 60 filled with a filling material. A device 40, a horizontal sealing device 20 that heat-seals the tubular film 60 in the width direction, and a control device (not shown) that controls the driving of each of the above devices are provided, and a filling 65 is put into the tubular film 60. Then, the tubular film 60 is heat-sealed in the width direction to manufacture the packaging bag 66.
[0020]
The bag making guide 13 disposed on the upper side of the vertical filling and packaging machine 1 that is the upstream side in the conveying direction of the tubular film 60 guides the sheet-like film 61 and forms it into a tubular shape. The overlapping portions of both side edges of the film are in the form of an envelope (lap seal) in which the inner surface and the outer surface of the film 61 are in surface contact.
[0021]
The film guide 19 connected to the bag making guide 13 is a member having a semi-cylindrical cross-sectional shape and extending in a substantially vertical direction, and guides the transported cylindrical film 60. Inside the film guide 19, a feeding pipe 45 for feeding the filling 65 is arranged in a substantially vertical direction.
[0022]
The vertical sealing device 10 is disposed below the bag making guide 13 and heat seals an overlapping portion (not shown) formed by the bag making guide 13 in a direction along the side edge of the film 61. In addition, the film 61 which became cylindrical by the vertical seal apparatus 10 as mentioned above is shown as the cylindrical film 60. The vertical sealing device 10 will be described in detail later with reference to other drawings.
[0023]
The squeeze device 40 includes a pair of squeeze rollers 41 that sandwich the cylindrical film 60 below the vertical seal device 10, and the squeeze rollers 41 are disposed to face each other with the cylindrical film 60 interposed therebetween. Each squeeze roller 41 is rotatably provided by a driving unit (not shown), and rotates the squeeze roller 41 with the tubular film 60 sandwiched therebetween, thereby feeding the tubular film 60 downward in a substantially vertical direction. In addition to the squeeze roller 41, a film feed roller 48 that rotates in synchronization with the squeeze roller 41 and conveys the cylindrical film 60 is disposed above the squeeze roller 41 so that the cylindrical film 60 can be sent without being crushed. Is arranged. Therefore, the cylindrical film 60 can be transported only by the film feed roller 48 with the squeeze roller 41 opened, or by using the film feed roller 48 and the squeeze roller 41 at the same time.
[0024]
The horizontal sealing device 20 is disposed below the squeeze device 40, and has a pair of members disposed to face each other with the tubular film 60 interposed therebetween, and the feeding direction of the tubular film 60 by a driving unit (not shown). It moves forward and backward in the direction orthogonal to. One member incorporates heating means (not shown) such as an electric heater, and the other member includes a cutter (not shown) provided to be able to advance and retract. The horizontal sealing device 20 configured as described above sandwiches the tubular film 60, heat-seals it in the width direction of the tubular film 60, cuts the heat-sealed portion with a cutter (not shown), and the packaging bag 66. Can be separated.
[0025]
Further, the horizontal sealing device 20 has a mechanism capable of heat sealing with a box motion type used in a general packaging machine, and can perform heat sealing without stopping the conveyance of the tubular film 60. The detailed explanation is omitted.
[0026]
The vertical seal device 10 of the present embodiment will be described in more detail with reference to FIGS.
[0027]
FIG. 2 is a front view showing the vertical sealing device 10 of the vertical filling and packaging machine 1 shown in FIG. 1 in more detail, and is a diagram showing a part in a sectional view. 3 is a top view of the vertical sealing device 10 shown in FIG. 2, and FIG. 4 is a right side view of the vertical sealing device 10 shown in FIG.
[0028]
As shown in FIG. 2, the vertical seal device 10 includes a vertical seal unit 11 that sandwiches an overlapping portion of the film 61 and heat-seals by attaching an envelope, and a drive mechanism 50 that moves the vertical seal unit 11 up and down. .
[0029]
The vertical seal unit 11 includes a heater bar 12 provided with a heating means (not shown) for heat-sealing the film 61, and a receiving member 14 disposed to face the heater bar 12. The heater bar 12 has a shape having a length in a substantially vertical direction in order to vertically seal the film 61. The heater bar 12 advances and retreats in a direction perpendicular to the transport direction of the film 61, that is, in a horizontal direction by a driving means (not shown) such as an air cylinder. It is provided to be movable. The receiving member 14 is supported by an inner main pipe 16 to be described later, and a silicone rubber 14a is formed on the surface facing the heater bar 12 to prevent the film 61 that is in a semi-molten state during heat sealing from adhering. It is pasted.
[0030]
The drive mechanism 50 includes an elevating block 55 that holds the above-described heater bar 12 and the like, an inner main pipe 16 that is a support for the receiving member 14 and that is connected to the elevating block 55, and a drive source for moving them up and down And a ball screw 51 that constitutes a feed screw mechanism that transmits the rotary motion of the servo motor to the lifting block 55. That is, in this embodiment, the elevating block 55 and the inner main pipe 16 are holding means for the heater bar 12 and the receiving member 14, and the servo motor SM and the ball screw 51 are driving means for moving the holding means.
[0031]
The elevating block 55 is provided so as to be movable along a post 53 provided in parallel with the charging pipe 45 and can move up and down in a substantially vertical direction.
[0032]
More specifically, as shown in FIG. 3, the lifting block 55 is supported by two posts 53 that are guide members. Between the two posts 53, a ball screw 51 for moving the lifting block 55 up and down is provided in parallel with the post 53 and is engaged with the lifting block 55. Moreover, since the raising / lowering block 55 is the shape surrounding the inner main pipe 16 grade | etc., It does not interfere with them. The heater bar 12 described above is provided on the opposite side of the lifting block 55 to the side on which the ball screw 51 is engaged, and is provided so as to be capable of moving back and forth in a direction substantially perpendicular to the transport direction of the film 61.
[0033]
Returning to FIG. 2 again, the lifting block 55 and the ball screw 51 are engaged via a nut 52 provided on the lifting block 55. As a result, the lifting block 55 moves according to the rotation amount of the ball screw 51.
[0034]
The servo motor SM is fixedly disposed so that its rotation axis is parallel to the ball screw 51, and a pulley 53a is provided on the rotation axis. A pulley 53 b is also provided at the lower end of one ball screw 51, and a timing belt 54 is spanned between the two pulleys 53 a and 53 b, and the rotation of the servo motor SM is transmitted to the ball screw 51. The servo motor SM is connected to a control device (not shown) and can freely adjust the amount of rotation and the like.
[0035]
In order to move the film 61 in the conveying direction of the film 61 with the film 61 sandwiched between the heater bar 12 and the receiving member 14, it is desirable that the receiving member 14 moves integrally with the heater bar 12. In this embodiment, since the film 61 is overlaid in the form of envelope tension, the receiving member 14 needs to move inside the film 61 formed in a cylindrical shape. Therefore, in the present embodiment, the inner main pipe 16 that is a support for the receiving member 14 is configured as follows, and can be moved up and down in synchronization with the heater bar 12.
[0036]
With reference to FIG. 3, the cross-sectional shape of the inner main pipe 16 will be described. The inner main pipe 16 having a rectangular cross section is coaxial with the input pipe 45 and is provided so as to surround the input pipe. Further, a pair of semi-cylindrical film guides 19 are disposed on the outside thereof. Since the film guide 19 does not exist between the receiving member 14 provided on the inner main pipe 16 and the heater bar 12, the receiving member 14 and the heater bar 12 can contact each other. During the operation of the packaging machine, the film 61 formed into a cylindrical shape by the bag making guide 13 is guided by the film guide 19, and the overlapping portion is located in an area sandwiched between the heater bar 12 and the receiving member 14. It is transported to pass.
[0037]
Returning to FIG. 2 again, the inner main pipe 16 is connected to the lifting block 55 by connecting members such as the connecting shaft 17 and the shaft connecting portion 18.
[0038]
A connecting shaft 17 extending upward is disposed on the side of the lifting block 55 where the vertical seal unit 11 is disposed. The upper end of the connecting shaft 17 and the upper end of the inner main pipe 16 are connected via a shaft connecting portion 18, and the position of the shaft connecting portion 18 is made so as not to interfere with the tubular film 61. It is preferably above the upper end of the overlapping portion formed by the guide 13. More preferably, it may be above the upper end of the bag making guide 13. In detail, the connecting shaft 17 is two members provided in parallel to each other as shown in the side view of FIG.
[0039]
The operation of the vertical filling and packaging machine 1 of the present embodiment configured as described above will be described below.
[0040]
In the vertical filling and packaging machine 1, the horizontal sealing device 20 performs box motion type heat sealing, and can form the packaging bag 66 while continuously transporting the tubular film 60. Since the operation of the squeeze device 40 and the horizontal sealing device 20 is the same as that of a general box motion type vertical filling and packaging machine, the description is omitted here, and the film 61 fed at a constant speed is vertically sealed as an example. The operation of the vertical seal device 10 will be described with reference to the timing diagram shown in FIG.
[0041]
In the timing diagram shown, the horizontal axis indicates time, and the vertical axis indicates the height of the heater bar 12. As described above, in this embodiment, the heater bar 12 and the receiving member 14 move synchronously, but FIG. 5 schematically shows only the heater bar 12.
[0042]
The film 61 has a constant conveyance speed V._fThe length of the heater bar 12 is indicated by L. An overlapping portion of the film 61 overlapped by the bag making guide 13 described above is defined as S, and a region obtained by dividing S by a length corresponding to the length L of the heater bar 12 is defined as a region S.₀, S₁, S₂It shows with.
[0043]
In FIG. 5, t on the time axis₀In the initial state, the heater bar 12 is heated by operating a heating means (not shown) at a position almost at the upper end of the movable range, and the region S₁This is a state immediately before starting to form the vertical seal portion. T on time axis₂In the state shown in FIG. 4, the film 61, that is, the overlapping portion S is time t.₂Indicates the state where only L has been sent after the elapse of time, and region S₁Is conveyed by L with respect to the initial state, and the next area S₂This is the state immediately before starting to heat seal. Region S₀Has a vertical seal already formed by the previous heat seal.
[0044]
First, region S₁T on the time axis to start heat sealing of₀As shown in the state, the heater bar 12 starts to move downward on the downstream side in the transport direction of the film 61. That is, the servo motor SM shown in FIG._fAnd the descending speed V, which is the approximate speed_dStart descending at. Since the heater bar 12 and the receiving member 14 are held by the elevating block 55 and the like, both members start to move downward simultaneously.
[0045]
At the same time that the heater bar 12 starts to move downward, the driving means (not shown) is operated to press the film 61 with the heater bar 12, and the overlapping portion S of the film 61 is sandwiched between the heater bar 12 and the receiving member 14. In this state, the region S₁While forming a vertical seal portion on time t₁The heater bar 12 is moved downward until elapses.
[0046]
Predetermined time (t₁After the elapse of time, the heater bar 12 is retracted to release the clamping pressure of the overlapping portion S. Then, in order to return the heater bar 12 to the original height, the servo motor SM is started to reversely rotate. Ascending speed V_uAnd the rising time is t_ThreeAnd
[0047]
The heater bar 12 rises and the time axis t₂Then, the region S₁Continuous region S₂The film 61 is pressed again to heat-seal.
[0048]
By repeating the above series of operations, a constant speed V_fEven when the film 61 is continuously conveyed, a continuous vertical seal portion can be formed.
[0049]
By the way, since the several vertical seal | sticker part formed as mentioned above has a function which seals the packaging bag 66 (refer FIG. 1), it is preferable to form continuously without a gap. In the case of FIG.₁Vertical seal part and region S formed in the next process₂The condition for continuously forming the vertical seal portion is the time for the heater bar 12 to move up and down t₁And t_ThreeT is the time when the film 61 is sent downward by L₂It may be controlled so as not to exceed.
[0050]
More preferably, region S₁Vertical seal part and region S formed in the next process₂It is preferable to control the vertical movement of the heater bar 12 so that the end portions of the vertical seal portions overlap each other so that the vertical seal portions of the vertical seal portions are reliably connected.
[0051]
However, as shown in FIG. 6, the region S in which the vertical seal portion is formed.₁, S₂Even if there is a discontinuous portion without being continuous, the length of the discontinuous portion, that is, the region S₁And S₂If the distance between and does not exceed the width of the horizontal seal portion, the horizontal seal portion and the vertical seal portion can be sealed by performing horizontal seal. In addition, in the filling process, if the filling 65 is thrown to a position exceeding the discontinuous part, there is a risk of leakage from the discontinuous part. Cheap. However, the packaging bag 66 can be manufactured if the amount of the filled material 65 does not exceed the discontinuous portion. In addition, when the filling 65 is a solid material, if it is charged until it reaches a discontinuous portion, the solid material will be crushed during horizontal sealing. Even when the filling 65 is a solid, the packaging bag 66 can be manufactured.
[0052]
As described above, in the vertical sealing operation according to the present embodiment, the region where the film 61 is vertically sealed by the heater bar 12 and the receiving member 14, that is, the overlapped portion S is sandwiched, and the time is substantially the same as that of the film 61. t₁Area S while moving only downward₁A vertical seal portion is formed in
[0053]
Therefore, the heat of the heater bar 12 is efficiently transmitted to the film 61, and good heat sealing can be performed in a short time. In addition, since the formed vertical seal portion does not rub against the heater bar 12 and the receiving member 14, the vertical seal portion becomes more beautiful, and the generation of wrinkles can be suppressed.
[0054]
In particular, even in the case where the horizontal sealing device 20 operating in the box motion type is provided as in the present embodiment and the film 61 is continuously fed, good vertical sealing can be performed without stopping the film conveyance. .
[0055]
Further, since the drive source for the vertical movement of the heater bar 12 and the like is a servo motor SM whose rotation can be freely changed, the amount of rotation of the servo motor SM can be changed only by adjusting a control device (not shown). The moving speed can be easily changed. Therefore, even when the shape of the packaging bag 66 is changed or the manufacturing speed of the packaging bag 66 is changed, it can be easily handled. It is possible to use a stepping motor as a drive source instead of the servo motor SM, but it is preferable to use the servo motor SM in terms of operational reliability.
[0056]
In the present embodiment, the horizontal sealing device 20 capable of performing box motion type heat sealing has been described. However, the present invention is not limited to this, and is fixedly arranged and faces the direction perpendicular to the conveyance direction of the tubular film 60. A known horizontal sealing device that moves may be used. That is, even when the cylindrical film 60 is intermittently fed, the vertical sealing device according to the present invention can be used for the purpose of ensuring a sufficient heat sealing time.
[0057]
In the present embodiment, the case where the cylindrical film 60 is sandwiched and transported by the squeeze roller 41 has been described. However, when transported only by the film feed roller 48, the squeeze roller 41 is not necessarily required.
[0058]
In this embodiment, as shown in FIG. 2, a feed screw mechanism using a ball screw 51 is used. However, a crank lever is engaged with the rotation shaft of the servo motor SM to convert the rotation motion into a reciprocating linear motion. A mechanism may be used. However, a feed screw mechanism is more preferable in that the moving range of the heater bar 12 and the like can be easily adjusted.
[0059]
Furthermore, the form of the vertical seal is not limited to the form of envelope sticking as described above, and the effect of the present invention is not lost even when the palm is attached. In this case, the bag-making guide 13 shown in FIG. 2 may be changed to one for attaching a palm, and the vertical seal unit 11 may also be changed to one provided with a heater bar 12 and a receiving member 14 corresponding to the tension of the palm. When the palms are attached, the overlapping portion of the film 61 formed in a cylindrical shape protrudes radially outward of the cylindrical shape, and therefore the receiving member 14 may be disposed outside the film 61 formed in a cylindrical shape. The holding member (such as the inner main pipe 16 shown in FIG. 2) that supports the receiving member 14 and moves up and down inside the film 61 does not have to be configured.
[0060]
In addition, as the means for welding the film 61, an already known ultrasonic sealing means, high frequency dielectric heating sealing means or the like may be used for the vertical sealing unit 11 instead of the heating means described above. Even with these means, it is possible to efficiently heat seal by sandwiching the film 61 as in the present embodiment and performing heat sealing while moving at approximately the same speed as the film conveyance speed, and also prevent wrinkles from occurring. .
[0061]
Further, the arrangement position of the vertical seal unit 11 is not limited to the form in which the vertical seal unit 11 is arranged on the opposite side of the drive mechanism 50 with the film 61 interposed therebetween as shown in FIG.
[0062]
Therefore, the form of the packaging bag is not limited to the so-called pillow-type packaging bag in which the vertical seal portion as shown in the present embodiment is formed in the approximate center of the packaging bag. For example, it is also possible to change the direction of the vertical seal device, change the vertical seal unit to one that can be held together, and manufacture a three-side sealed type packaging bag in which the vertical seal portion is formed on the side of the packaging bag. . Furthermore, even when manufacturing a four-side sealed package in which all four sides of the packaging bag are heat-sealed, the effect of the present invention is not lost. In this case, it is preferable to further provide a vertical seal unit for heat-sealing the folded portion of the film so that the two vertical seal units move simultaneously.
[0063]
Thus, the vertical sealing apparatus according to the present invention can be appropriately incorporated into a known vertical filling and packaging machine, and various packaging bags can be manufactured using sheet-like films.
[0064]
【The invention's effect】
  As explained above, according to the present invention,, For the overlapping part of envelope-laminated films,Heat generated by the heater bar of the vertical seal deviceIs effectiveSince it is transmitted efficiently, good heat sealing can be performed in a short time. In addition, since the vertical seal portion is formed without causing friction with the heater bar and the receiving member, the vertical seal portion becomes more beautiful, and the occurrence of wrinkles and the like can be suppressed.
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic configuration of an embodiment of a vertical filling and packaging machine of the present invention.
FIG. 2 is a front view showing details of the vertical sealing device of the vertical filling and packaging machine shown in FIG. 1, and is a view partially showing a cross-sectional view.
FIG. 3 is a top view of the vertical sealing device shown in FIG.
4 is a right side view of the vertical seal device shown in FIG. 2. FIG.
FIG. 5 is a timing diagram showing an operation of forming a continuous vertical seal portion on a film conveyed at a constant speed.
FIG. 6 is a perspective view showing a form in which a package is sealed by a non-continuous vertical seal portion.
FIG. 7 is a perspective view illustrating a vertical sealing device as an example of the prior art and a form of an overlapping portion formed by a bag making guide.
[Explanation of symbols]
1 Vertical filling and packaging machine
10 Vertical seal device
11 Vertical seal unit
12 Heater bar
13 Bag making guide
14 Receiving member
16 Inner main pipe
17 Connecting shaft
18 Shaft connecting part
19 Film guide
20 Horizontal sealing device
40 Shigoki equipment
41 Shigoki Roller
45 Input pipe
50 Drive mechanism
51 Ball screw
52 nuts
53a, 53b Pulley
54 Timing belt
55 Lifting block
60 Cylindrical film
61 films
65 filling
66 Packaging Bag
SM servo motor

Claims (4)

The step of forming the film into a cylindrical shape so that both side edges of the sheet-like film overlap each other in an envelope form, and heat the overlapping portion of the side edges along the side edge while transporting the film A step of sealing and forming a cylindrical film having a vertical seal portion formed thereby; a step of charging a filler into the cylindrical film; and a width direction of the cylindrical film charged with the filler And heat-sealing
As engineering of forming the tubular film has a heater bar which is disposed outside of the tubular film provided with a heating means, the tubular film is disposed opposite to the heater bar inside the Rutotomoni, by connecting member to said heater bar The heater bar and the receiving member are transported at substantially the same speed as the film transport speed while sandwiching the overlapping portion with a receiving member that is connected and configured to move integrally with the heater bar. method for producing a packaging Sobukuro you forming the vertical seal portion while moving towards the downstream side. A bag-making guide for forming the film in a cylindrical shape so that both side edges of the sheet-like film overlap each other in an envelope pasting form, and heat-sealing the overlapping portion between the side edges in the direction along the side edge, A vertical seal device for forming a cylindrical film having a vertical seal portion formed by the above, a film feeding means for transporting the film, an input pipe for charging a filler into the cylindrical film, and the filler being charged A horizontal sealing device for heat sealing in the width direction of the tubular film made,
The longitudinal sealing device includes a heater bar which provided with a heating means moves back and forth in a direction substantially perpendicular to the conveying direction of the film, a receiving member disposed opposite to the heater bar, for holding said heater bar and said receiving member Holding means and drive means for moving the holding means;
The holding means is configured to hold the heater bar and move up and down along the transport direction while being disposed inside the cylindrical film and a lifting block that is movable along the transport direction of the film. A connecting portion between the elevating block and the inner main pipe, which has an inner main pipe that supports the receiving member, and a connecting member that connects the elevating block and the inner main pipe, and is connected by the connecting member. Is provided above the upper end of the overlapping portion,
While nipped the overlap portion between the receiving member and the heater bar, said heater bar and said longitudinal sealing portion while moving toward the downstream side in the conveying direction of the film at a conveying speed substantially the same speed of the receiving member and the film vertical-type filling and packaging machine that be formed. The vertical filling and packaging machine according to claim 2 , wherein the driving means includes a servo motor. 4. The vertical filling and packaging machine according to claim 2 , wherein the driving unit further includes a feed screw mechanism that converts a rotational movement of the servo motor into a reciprocating linear movement of the holding unit. 5.

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