JP2001315708A - Filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filling and packaging machine which can achieve the high speed of the seal filling and packaging work while eliminating the shortage of the calorie when implementing the heat seal while pressurizing a packaging film with a longitudinal seal mechanism without adding any preheating mechanism. SOLUTION: In the packaging machine in which a packaging film F is longitudinally sealed by a pair of longitudinal seal rolls 15A and 15A provided on the longitudinal seal mechanism 15 and formed in a cylinder by the longitudinally sealed portion, the packaging film F is transversely sealed by a pair of transverse seal rolls 16A and 16A provided on a transverse seal mechanism 16 to form a bottom constituting a packaging bag P, and a work W is filled therein and continuously packaged by transversely sealing the packaging film by the transverse seal rolls 16A and 16A of the transverse seal mechanism 16 at a portion forming a bag mouth side to form the packaging bag P while feeding the packaging film F, the pair of longitudinal seal rolls 15A and 15A are arranged in an uneven manner in the carrying direction of the continuously transferred packaging film F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to seal a package, such as a liquid, a powder, or a viscous substance, hermetically by sealing a continuously transported packaging film in a three- or four-sided manner. The present invention relates to a filling and packaging machine.

[0002]

2. Description of the Related Art Conventionally, as a packaging bag which is filled with an object to be packaged such as a liquid, powder or a viscous substance and hermetically sealed, a film made of a synthetic resin or an aluminum foil is generally used. A packaging bag is formed by sealing a packaging film made of a packaging material such as a bonded laminate, three-dimensionally or four-sidedly, vertically and horizontally.

[0003] Therefore, as a filling and packaging machine for obtaining such a packaging bag by three-side sealing or four-side sealing and packaging, for example, JP-A-1-153410, JP-A-2-32929 or JP-A-61-29129. -6952
No. 1 publication. As an example, as shown in FIGS. 6 and 7, a pair of holding frames 2 are provided on a side portion of a machine base 1 of the filling and packaging machine as a filling and packaging machine for producing a packaging bag by three-side sealing. A film rewind R in which a film F is wound in a roll on a frame 2 is detachably held, and a film guide mechanism 3 and a film folding mechanism 4 are disposed above the machine base 1. A vertical sealing mechanism 5, a horizontal sealing mechanism 6, and a cutter mechanism 7 are provided from the upper side on the front surface of the device 1. The packaging film F is guided to the film folding mechanism 4 via the film guiding mechanism 3, and the film folding mechanism 4 F is folded in two along the longitudinal direction, and then fed while sandwiching the packaging film F between a pair of left and right vertical seal rolls 5A provided in the heated vertical seal mechanism 5. The sealing film 5 is heat-sealed by the vertical seal roll 5A to vertically seal the packaging film F in a tubular shape, and then the film F is formed by a pair of left and right horizontal seal rolls 6A provided in the heated horizontal seal mechanism 6. The horizontal seal FS is performed by heat sealing in the horizontal direction,
The bottom part which becomes the packaging bag P is formed by this horizontal seal FS,
As a result, the packaged object W made of liquid or the like is filled into the film F formed into a bottomed cylindrical shape by the filling nozzle 8A of the filling mechanism 8, for example. A continuous packaging bag P is formed by sealing the packaged object W by laterally sealing the bag mouth side of the film F with the roll 6A, and then cutting the middle portion of the continuous sealing bag FS portion of the continuous packaging bag P with a cutter. It is known that the packaging bags P are separated and sent out one by one by being cut by the mechanism 7.

In this case, the lateral seal mechanism 6 includes:
A pair of upper and lower horizontal seal rolls 6A of the first horizontal seal mechanism 6 and a horizontal seal roll 6A of the second horizontal seal mechanism 6 are provided along the longitudinal direction of the packaging film F. The filling nozzle 8A of the filling mechanism 8 is placed in the packaging film F which is sent out while being formed into a cylindrical bag by the filling mechanism 8A.
Is sealed by a pair of horizontal seal rolls 6A of the first horizontal seal mechanism 6 while sandwiching and pushing out the packaged object W filled by the horizontal seal FS.
After that, the horizontal seal FS, which has been heat-sealed by the first horizontal seal mechanism 6, is pressed again by the horizontal seal roll 6A of the second horizontal seal mechanism 6 in a low-temperature superheated state or a normal-temperature state, and then horizontally. The sealing state of the seal FS is kept good.

[0005]

In the above-mentioned conventional filling and packaging machine, the film F is fed out while being heat-sealed by the pair of vertical sealing rolls 5A of the vertical sealing mechanism 5. When the rotation speed of the vertical seal roll 5A is low,
Since the contact time between the vertical seal roll 5A and the packaging film F is long, the packaging film F which is heated and melted by receiving the heat of the vertical seal roll 5A is in a state where heat is properly applied to the hot-melt resin layer of the packaging film F. The packaging film F is melted and can be properly heat-sealed at the location of the vertical seal FH of the packaging film F. However, the higher the transport speed of the packaging film F, the more it is sandwiched between the pair of vertical seal rolls 5A. Since the area of the packaging film F to be heated by being pressed is arranged by abutting the packaging film F via the circular vertical seal roll 5A, the area to be pressurized and heat sealed is as follows. As shown in the schematic diagram of FIG. 7, the area T1 to be heated becomes a narrow area, and as a result, the heat of the respective portions of the front portion in the rotation direction and the rear portion in the rotation direction is reduced. Due to the shortage may be heat sealing failure occurs in vertical sealing FH portion in contact with their respective parts of the.

Therefore, in order to take this point into consideration, a preheating mechanism 9 is provided between the film folding mechanism 4 and the vertical sealing mechanism 5 on the upper side of the vertical sealing mechanism 5, that is, on the upstream side in the transport direction of the packaging film F. By preheating the packaging film F by the preheating mechanism 9 in advance, it is possible to eliminate shortage of heat when performing heat sealing while applying pressure by the vertical sealing mechanism 5, and to increase the speed of the sealing and packaging work of the packaging film F. It is possible to measure.

However, the speed of the filling / packaging operation can be increased, but the vertical sealing mechanism 5 is required.
In addition to this, it is necessary to additionally install a preheating mechanism 9, and it is necessary to set the preheating temperature of the preheating mechanism 9 in accordance with the transfer speed of the packaging film F. In addition to this, the number of parts increases, and There is a problem that the cost increases.

Accordingly, the present invention provides a filling method capable of achieving a high-speed seal filling and packaging operation while eliminating a shortage of heat when performing heat sealing while applying pressure by a vertical sealing mechanism without adding a preheating mechanism. It is intended to provide a packaging machine.

[0009]

According to a first aspect of the present invention, a packaging film which is continuously transferred is vertically sealed by a pair of opposed vertical sealing rolls provided in a vertical sealing mechanism. Along with forming the film in a cylindrical shape, the packaging film formed in the cylindrical shape is horizontally sealed by a pair of horizontal seal rolls provided in a horizontal sealing mechanism, and the horizontal sealing portion forms a bottom portion that becomes a packaging bag, The bottom portion is filled with an object to be packaged in a packaging film formed into a bottomed cylindrical shape, and a portion to be a bag mouth side of the packaging film is horizontally sealed by the horizontal sealing roll of the horizontal sealing mechanism while further feeding the packaging film. In a packaging machine that is continuously packaged as a packaging bag, the pair of vertical seal rolls are arranged stepwise with respect to the transport direction of the packaging film that is continuously transferred. A filling and packaging machine, characterized in that to become to.

[0010] In the first aspect of the present invention, in the second aspect, the pair of vertical seal rolls arranged at the step with respect to the transport direction of the packaging film includes: A filling and packaging machine characterized in that a part of an outer peripheral portion of each of the pair of vertical seal rolls is disposed so as to overlap with each other.

According to a third aspect of the present invention, in the first or second aspect, the packaging bag is formed by sealing the packaging film three- or four-way vertically and horizontally by the vertical sealing mechanism and the horizontal sealing mechanism. A filling and packaging machine characterized by hermetically sealing an object.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a continuously transferred packaging film is vertically sealed by a pair of opposed vertical sealing rolls provided in a vertical sealing mechanism, and the packaging film is formed into a cylindrical shape by the vertically sealed portions. At the same time, the packaging film formed in a cylindrical shape is horizontally sealed by a pair of horizontal sealing rolls provided in a horizontal sealing mechanism, and the horizontal sealing portion forms a bottom portion that becomes a packaging bag, and the bottom portion forms a bottomed cylindrical shape. Filling the packaging film into the packaging film formed in the above, furthermore, while feeding the packaging film, the portion which is the bag mouth side of the packaging film is laterally sealed by the horizontal sealing roll of the horizontal sealing mechanism and continuously packaged as a packaging bag. In the packaging machine, the pair of vertical seal rolls are arranged stepwise with respect to the transport direction of the packaging film that is continuously transported, It is possible to lengthen the regions where the packaging film portions of the rotation direction front side portion and the rotation direction rear side portion of the portion sandwiched by the pair of vertical seal rolls with respect to the packaging film are in contact with the peripheral surface of the vertical seal roll, respectively. This allows heat to be easily transferred to the hot-melt resin layer of the packaging film and melts well, so that even if the transfer speed of the packaging film is increased, the sealing state of the vertical sealing portion can be kept good, It is possible to prevent a heat seal failure at a vertical seal portion.

[0013] In addition, in a pair of vertical seal rolls arranged at the step in the conveying direction of the packaging film, each of the pair of vertical seal rolls in the direction orthogonal to the traveling direction of the packaging film. By arranging such that a part of the outer peripheral portion is overlapped, the packaging film follows the outer peripheral surfaces of the vertical seal roll located on the upstream side and the vertical seal roll located on the downstream side in the transport direction of the packaging film. Since it is pressed while being partially bent and is transferred in a contact state, the packaging film can be heated in advance, so that heat is easily transmitted to the hot-melt resin layer of the packaging film and it can be melted well. It is possible to perform the heat sealing of the vertical sealing portion satisfactorily.

[0014] The packaging bag may be a filling and packaging machine in which the packaging film is vertically and horizontally sealed three- or four-way by the vertical sealing mechanism and the horizontal sealing mechanism to hermetically seal the object to be packaged. The present invention is applicable to a vertical sealing mechanism of a type that hermetically seals a multiple-type four-side sealed packaging bag.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the accompanying drawings. The schematic configuration and operation of the filling and packaging machine according to the present invention will be described with reference to FIGS.
In the figure, as a configuration of the overall outline of the filling and packaging machine, a film winding roll R on which a packaging film F is wound is loaded and supported on a holding frame 12 provided on the side of the machine of the filling and packaging machine. The packaging film F guided out of the film roll R is given a predetermined tension via the film guiding mechanism 13 and is guided upward once, and the film provided on the top of the machine of the filling and packaging machine is provided. The folding film 14 is folded in two along the longitudinal direction of the packaging film F and guided downward.

In this embodiment, a pair of vertical seal rolls 15A provided on the vertical seal mechanism 15 is provided at two places on the left and right sides of the two-fold film F which is drawn and conveyed downward. The pair of vertical seal rolls 15A, 15A provided respectively heat seal the folded edges and the folded ends (both right and left edges) in the longitudinal direction, so that the longitudinal seal FH portions are on both sides of the packaging film F. It is formed at the end, and is then heat-sealed by a horizontal seal roll 16A of a horizontal seal mechanism 16 disposed below the vertical seal mechanism 15 to form a horizontal seal FS portion.

In this case, a pair of horizontal seal rolls 16A, 16A of the horizontal seal mechanism 16 are heat-sealed at predetermined intervals in the horizontal direction to form a horizontal seal portion FS, and the horizontal seal FS portion forms a packaging bag. A bottom portion of a bottomed cylindrical shape serving as P is formed, whereby the article F to be packaged is filled from the filling nozzle portion 18A of the filling mechanism 18 into the film F formed in the bottomed cylindrical shape, and then the film F is sent out. After the horizontal seal roll 16A of the horizontal seal mechanism 16,
A portion to be a bag mouth portion of the film F is heat-sealed by 16A, and the article to be packaged W is sealed by the horizontal seal FS by this heat sealing.

As shown in the conventional example, the horizontal seal FS is not shown, but is further pressed and sealed by a pair of horizontal seal rolls provided in the second horizontal seal mechanism to seal the film F. It may be configured that the four sides are heat-sealed and the packaging bag P is continuously conveyed downward in a continuous packaging state one after another.

Below the horizontal sealing mechanism 16,
A cutting mechanism 17 provided with a cutter blade capable of separating and carrying out a substantially central portion of a horizontal seal FS portion of the packaging bag P in the vertically-connected state is provided.

In the first embodiment, both end portions of the package film F folded in half are connected to the vertical seal rolls 15 facing the vertical seal mechanism 15 respectively.
A and 15A apply a vertical seal FH. In this embodiment, two pairs of vertical seal rolls 15A and 15A are provided in a pair with respect to the transport direction of the packaging film F to be transported. They are arranged differently.

In this case, the vertical seal rolls 15 which form a pair in a stepwise manner with respect to the transport direction of the packaging film F, respectively.
A, 15A, the packaging film F
The outer peripheral portions of the pair of vertical seal rolls 15A, 15A are arranged so as to partially overlap with each other in a direction perpendicular to the traveling direction of the sheet. Direction dimension)
Can be set by changing.

Accordingly, in the filling and packaging machine of the present invention having the above-described structure, the pair of vertical seal rolls 15A, 15A arranged stepwise, each pair of the vertical seal rolls 15 with respect to the packaging film F.
A, a region (heated region T2) in which the portion of the packaging film F in the front part in the rotation direction and the part in the rear part in the rotation direction sandwiched by the parts A and 15A follow the peripheral surfaces of the vertical seal rolls 15A and 15A, respectively. Since the length can be set long, heat can easily be transmitted to the hot-melt resin layer of the packaging film F and can be melted well. Even if the transport speed of the packaging film F is increased, the sealing state of the vertical seal FH portion is maintained. Can be maintained favorably, and poor heat sealing at the vertical seal FH can be prevented.

The outer periphery of each of the pair of vertical seal rolls 15A, 15A, which are arranged stepwise with respect to the transport direction of the packaging film F and make a pair with each other in a direction orthogonal to the traveling direction of the packaging film F. By arranging the parts so as to partially overlap with each other, the vertical seal roll 15 positioned on the upstream side in the transport direction of the packaging film F is disposed.
Since the packaging film F is pressed and contacted while being partially bent and transferred in accordance with the outer peripheral surface of the vertical seal roll 15A located on the downstream side with A, the packaging film F can be heated in advance. Thereby, heat is easily transmitted to the hot-melt resin layer of the packaging film F and can be melted well, so that the heat seal at the vertical seal FH can be performed well.

The pair of vertical seal rolls 1
Since there is no need to separately provide a preheating mechanism only by arranging the 5A and 15A at different levels, there is an advantage that the present invention can be implemented with conventional components without complicating the configuration.

It should be noted that the present invention is not limited to the above-described embodiment, but various modifications can be made within the scope of the present invention. The film F is guided out in a half-folded state, and the folded end (the left and right edges) of the folded packaging film F forms a pair with the folded end that is folded in the half-fold. Although the example has been described in which the vertical seal rolls 15A and 15A provided at two locations are vertically heat-sealed to form the packaging bag P with the four-sided seal FH that is vertically sealed at both ends, respectively. For example, as shown in FIG. 3, the packaging film F is sealed on three sides to form a packaging bag P. As shown in FIG. 4, two packaging films F are formed.
Are superimposed on each other and guided out.
Heat-sealing the four sides of the packaging film F to form a packaging bag P while heat-sealing both edges of the packaging film F vertically with two vertical sealing rolls. As shown in FIG. The half-folded folded end and the folded film F
The vertical and horizontal heat seals of three vertical seal rolls of the vertical seal mechanism, whose central and folded edges (both the left and right edges and the intermediate part) make a pair, form two rows of cylindrical bags. A bag P is formed, or a number of vertical seal rolls are provided in a vertical seal mechanism (not shown), and a large number of packaging bags are formed in units of rows sealed in four sides by the vertical seal roll and the horizontal seal roll of the horizontal seal mechanism. In the manufacturing process of the obtained packaging bag, the configuration of the vertical sealing mechanism in which at least the vertical sealing roll according to the present invention is disposed stepwise with respect to the transport direction of the continuously transported packaging film, The same effect can be obtained by equipping it according to the mechanical device of the packaging machine.

Further, depending on the outer diameter of the vertical seal roll 15A of the vertical seal mechanism 15, for example, when the outer diameter of the vertical seal roll 15A is relatively small,
The pair of vertical seal rolls 15A, 15A is stepped with respect to the outer diameter dimension ratio of the pair, and the vertical dimension is set large, and the pair is formed in a direction orthogonal to the advancing direction of the packaging film F. Each vertical seal roll 15
By setting a large wrap amount at which a part of the outer peripheral portions of the A and 15A overlap, the front portion in the rotation direction and the rotation of the portion sandwiched by the respective vertical seal rolls 15A and 15A forming a pair with the packaging film F are rotated. A region (heated region T2) where the portion of the packaging film F on the rear side in the direction contacts the peripheral surfaces of the vertical seal rolls 15A, 15A, respectively, can be set long.

[0027]

As described above in detail, according to the first aspect of the present invention, the continuously transported packaging film is vertically sealed by a pair of opposed vertical sealing rolls provided in the vertical sealing mechanism. The packaging film is formed in a tubular shape by the location, and the packaging film formed in the tubular shape is laterally sealed by a pair of horizontal sealing rolls provided in a horizontal sealing mechanism, and the bottom portion which becomes a packaging bag by the horizontal sealing location. A packing material is filled in a packaging film formed into a bottomed cylindrical shape by the bottom portion, and a portion to be a bag mouth side of the packaging film is fed while further feeding the packaging film. In a packaging machine that is continuously sealed as a packaging bag by horizontal sealing, the pair of vertical sealing rolls is stepped with respect to the transport direction of the packaging film continuously transported. By arranging, the packaging film portions of the rotation direction front side portion and the rotation direction rear side portion of the portion sandwiched by the pair of vertical seal rolls with the packaging film respectively contact the peripheral surface of the vertical seal roll. The length of the area to be sealed can be set longer, which allows the heat to be easily transferred to the hot-melt resin layer of the packaging film and melts well. Satisfactorily, and it is possible to prevent a heat seal failure at a vertical seal portion.

According to the first aspect of the present invention, in the second aspect of the present invention, there is provided a pair of vertical seal rolls arranged at the step with respect to the conveying direction of the packaging film. By being arranged so that a part of the outer peripheral portion of each pair of the vertical seal rolls overlaps with respect to the direction orthogonal to the vertical seal rolls positioned upstream with respect to the transport direction of the packaging film, Since the packaging film is pressed in a contact state while being partially bent and transferred in accordance with the outer peripheral surface of the vertical seal roll located on the downstream side, the packaging film can be heated in advance, and thereby the packaging film can be heated. The heat is easily transmitted to the hot-melt resin layer, and the resin can be satisfactorily melted.

According to the first or second aspect of the present invention, in the third aspect of the present invention, the packaging film is formed by three- or four-way sealing the packaging film vertically and horizontally by the vertical sealing mechanism and the horizontal sealing mechanism. The present invention can be applied to a filling and packaging machine that hermetically seals an object to be packaged, and can also be applied to a vertical sealing mechanism of a type that hermetically seals a multiple-type four-side sealed packaging bag.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view of a filling and packaging machine showing a first embodiment of the present invention.

FIG. 2 is a side view of a main portion mainly showing a packaging film portion to be heat-sealed by a vertical sealing mechanism of the filling and packaging machine of FIG. 1;

FIG. 3 is a perspective view of a three-side sealed packaging bag applied in the present invention.

FIG. 4 is a perspective view of a packaging bag formed by stacking two packaging films applied in the present invention and sealing the four sides.

FIG. 5 is a perspective view showing a packaging bag formed by pulling out a single packaging film applied in the present invention in a half-folded state and making two vertical rows of cylindrical bags.

FIG. 6 is an overall schematic front view of a conventional filling and packaging machine.

FIG. 7 is a side view of a main part mainly showing a packaging film portion to be heat-sealed by a vertical sealing mechanism of the filling and packaging machine of FIG. 6;

[Explanation of symbols]

 F Packaging film FH Vertical seal FS Horizontal seal P Packaging bag R Film wrapping T1, T2 Area to be heated W Packaged object 14 Film fold mechanism 15 Vertical seal mechanism 15A Vertical seal roll 16 Horizontal seal mechanism 16A Horizontal seal roll 17 Cutting mechanism 18 Filling mechanism

Claims (3)

[Claims] 1. A packaging film which is continuously transported is vertically sealed by a pair of opposed vertical sealing rolls provided in a vertical sealing mechanism, and the packaging film is formed into a tubular shape by the vertical sealing portions, and the tubular film is formed into a tubular shape. The formed packaging film is laterally sealed by a pair of horizontal seal rolls provided in a horizontal sealing mechanism, and the horizontal sealing portion forms a bottom portion serving as a packaging bag, and the bottom portion forms a bottomed cylindrical packaging film. In a packaging machine which is filled with an article to be packaged and further sealed as a packaging bag by laterally sealing a portion on the bag mouth side of the packaging film while feeding the packaging film by the horizontal sealing roll of the horizontal sealing mechanism. A filling and packaging machine, wherein the pair of vertical seal rolls are arranged stepwise with respect to a transport direction of the packaging film continuously transferred. 2. A pair of vertical seal rolls arranged at the step in the conveying direction of the packaging film,
The filling and packaging machine according to claim 1, wherein a part of an outer peripheral portion of each of the pair of vertical seal rolls is arranged to overlap in a direction orthogonal to a traveling direction of the packaging film. . 3. The packaging bag is characterized in that the packaging film is three- or four-sided sealed vertically and horizontally by the vertical sealing mechanism and the horizontal sealing mechanism to hermetically seal the object to be packaged. The filling and packaging machine according to claim 1 or 2.