JP4299897B2 - Filling and packing machine for fluid packaging - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filling and packaging method and a filling and packaging machine for a fluid packaging material in which a fluid packaging material is filled into a cylindrical packaging film and packaging is performed without leaving a gas inside.
[0002]
[Prior art]
Conventionally, with respect to bag packaging of fluid packaging containing solids and liquids, such as food containing fruits such as fruit-containing fruit and filamentous konjac, etc., it has been formed from a cylindrical packaging film and filled with fluid packaging By forming a horizontal seal on the bag, the opening of the bag and the bottom of the next bag are sealed, and the filling of the mixed package and the sealing of the opening of the bag and the bottom of the next bag are repeated in order, individually In order to produce a package, filling packaging in which a bag package is cut from a cylindrical packaging film with a cutter is known.
[0003]
In a filling and packaging machine for packaging a flowable package, a filling means for filling the flowable package, a feeding means for supplying a cylindrical packaging film to the front end side of the filling means, and a flowable package filled by the filling means Is provided with a horizontal sealing means for applying a horizontal seal at a position spaced apart in the longitudinal direction on the cylindrical packaging film in a state of being accommodated therein. The horizontal sealing means is usually a horizontal heat sealing means that includes a heater inside and welds the packaging material (or a welded layer laminated to the packaging material) by the heat generated by the heater. The cylindrical packaging film is laterally sealed by lateral sealing means to form the bottom of the bag, and the filled bag is laterally sealed at a position slightly below the top of the fluid packaging, that is, the upper surface of the liquid level. As a result, a bag package that does not contain air is completed, and a bag bottom for the next packaging is formed. In order to produce the finished package individually, a cutting means may be provided in association with the transverse sealing means. By repeating these series of procedures, formation of the bottom of the bag, filling of the flowable package, sealing of the opening of the bag, and cutting of the package from the cylindrical packaging film can be performed continuously. Cylindrical wrapping film is usually formed by forming a wrapping wrapping film into a cylinder with a cylinder former and heat-sealing the overlapped vertical edges with vertical heat sealing means. Of course, you may do.
[0004]
In the case where the flowable package is likely to be spoiled or deteriorated by oxygen contained in the air, such as food, it is preferable not to include air in the bag. For this reason, an automatic liquid filling and packaging machine provided with an air bleeding roller is known in order to prevent air from entering the upper part of the horizontal sealing roller of the packaging machine (for example, Japanese Patent Office Publication No. 53-219 [2568] Collection of conventional technology (packaging industry), Sho 53, 12/20, p. 35, bag making filling and packaging machine, "Air bleeding roller device in liquid packaging machine").
[0005]
Japanese Patent Publication No. Sho 52-7792 discloses a vertical dropper, a bag making machine for forming a belt-like film descending along the outer periphery into a tubular shape, and the tubular film at an appropriate interval. In a high-speed bag-type bag making and packaging machine comprising a cutting sealer provided at a lower position of the granular material dropping basket in order to melt in the horizontal direction, the belt-like film feeding is synchronized between the cutting sealer and the granular material falling basket. There is disclosed a high-speed bag-type bag making and packaging machine provided with a granular material receiving mechanism for holding the belt-like film from the outside while moving with the belt-like film and releasing the cutting after the cutting of the cutting sealer is completed.
[0006]
Since the air bleed roller is provided above the position of the horizontal seal, a space is required for the air bleed roller in the automatic liquid filling and packaging machine, and the liquid automatic filling and packaging machine is miniaturized. Is difficult. Moreover, it is difficult to completely prevent air from being caught by the air bleed roller.
[0007]
Moreover, when a fluid package consists of a liquid and a solid substance, a horizontal sealing means may carry out a horizontal seal of a cylindrical packaging film in the state which has bitten the solid substance. For example, as is often seen in foodstuffs, solids that do not contain enough water and have a low specific gravity are floating above the liquid, and the top of the solids does not fall below the working position of the horizontal sealing means. Sometimes. In such a case, the presence of solid matter is not detected and the lateral sealing operation is not performed, or if the lateral sealing operation is forcibly performed, the solid matter is sandwiched between the sealed portions, resulting in a defective product as a package. Problems such as damage to the lateral sealing means and suspension of operation of the filling and packaging machine occur.
[0008]
In order to prevent such a solid material biting phenomenon, a conventional filling and packaging machine is provided with a squeezing roller in association with the transverse sealing means. 9-12 is explanatory drawing which showed the operation state of the ironing roller in order. In a conventional filling and packaging machine, a pair of squeezing rollers 33 that perform a box motion operation is provided above a horizontal heat seal bar 31 that is a horizontal sealing means. First, the mixed package containing the solid material A is filled into the cylindrical packaging film 1 that is bottom-sealed by the horizontal heat seal bar 31 (FIG. 9). In the vicinity of the liquid level H of the liquid B of the mixed package, a pair of squeezing rollers 33 are pressed against each other via the cylindrical packaging film 1. A part of the mixed package (which may contain solid matter A) is pushed back into the cylindrical packaging film 1 above the squeezing roller 33, and the liquid level J of the liquid B is formed above the squeezing roller 33. Is done. In this state, when the ironing roller 33 is rotated and rotated, the cylindrical packaging film 1 is sent downward. The region M of the cylindrical packaging film 1 that has been squeezed while the squeezing roller 33 is in contact with it is a region in which almost no package is present, and the bag package 40 ahead of the region M is in a state in which no air is contained. The mixed package is enclosed (FIG. 10).
[0009]
While the cylindrical packaging film 1 is sandwiched by the non-rotating ironing roller 33, the cylindrical packaging film 1 is fed downward as indicated by an arrow K, and the region M squeezed by the ironing roller 33 is a horizontal heat seal bar. Descent to position 31 (FIG. 11). In this state, the lateral heat seal bar 31 is operated to heat seal the region M, thereby forming the upper seal portion 42 of the bag opening and the bottom seal portion 41 for the next bag. The pair of squeezing rollers 33 moves backward and away from each other, and then rises to the original ascending position as indicated by an arrow L, and one cycle of the box motion operation of the squeezing roller 33 is completed. After the bottom seal portion 41 is formed, the mixed package is filled into the cylindrical packaging film 1 by the filling means for the next packaging (FIG. 12). A cutting means 32 can be incorporated in the horizontal heat seal bar 31.
[0010]
In the filling and packing machine for a mixed package having such a squeezing roller, the squeezing roller needs to perform a squeezing operation and a box motion operation by its own rotation. When the horizontal sealing means is operated, the horizontal sealing means is the squeezing roller. In order to avoid interference with the squeezing roller, it is necessary to retract the squeezing roller, which complicates the mechanism for both operations of the squeezing roller. Further, in order to perform the box motion operation of the squeezing roller, it is necessary to secure a space between the lower end of the filling tube 3 and the heat seal bar 31, which increases the size of the filling and packaging machine. At this time, since the squeezing roller is separated from the cylindrical packaging film, there is a possibility that the liquid filling containing solid matter will rise to the cylindrical wrapping film that has been subjected to the ironing process to be sealed by the lateral sealing means. There is also. In particular, when the solid of the mixed package does not contain enough moisture as is often seen in food products, the solid may float on the liquid and may be bitten by the lateral sealing means. Further, if it is attempted to prevent biting by the horizontal seal and completely prevent air from entering, the mechanism for that purpose becomes more complicated, the packaging speed is lowered, and the packaging capacity is lowered.
[0011]
[Problems to be solved by the invention]
In the filling and packaging machine for packaging the fluid packaging as described above, the pressing operation of the squeezing means for pressing the cylindrical wrapping film and the cylindrical shape without causing the squeezing means to perform the squeezing operation and the box motion operation by rotation. By combining with the feeding operation of the packaging film feeding means, compaction can be performed for squeezing and packaging of fluid packaging, and fluidity can be applied to the portion of the cylindrical packaging film where fluid packaging has existed. There is a problem to be solved in that the package is pushed away and a lateral seal is applied to obtain a package of a fluid package in which a gas such as air does not enter.
[0012]
[Means for Solving the Problems]
An object of the present invention is to solve the above-mentioned problem, and even if the mixed package contains a solid substance that floats on the liquid, the flowability does not depend on the box motion operation of the ironing means. In the case of a part of the package or a mixture containing solids, a horizontal seal is formed by the horizontal seal means on the part of the cylindrical packaging film in which only the liquid component is sandwiched in the gap, so that the mechanism is simple, It is an object of the present invention to provide a filled packaging that does not have the possibility of biting solids with a seal, does not contain air in the package, and can exhibit high packaging ability.
[0013]
In order to solve the above-mentioned object, the present invention is configured as follows. That is, this invention fills the inside of the cylindrical packaging film fed by the feeding means, presses the cylindrical packaging film in a state leaving a predetermined gap by the ironing means, and The cylindrical packaging film filled with the fluid packaging is squeezed back by feeding the cylindrical packaging film so that the gap is filled with the fluid packaging, and the fluidity in the gap is closed by closing the gap. The present invention relates to a filling and packaging method for a fluid package comprising forming a horizontal seal by a horizontal seal means acting on a portion of the tubular packaging film that is in a state where the package is pushed away.
[0014]
Further, the present invention provides a filling means for filling the tubular packaging film fed by the feeding means with a fluid packaging material, and is disposed so as to be movable forward and backward with respect to the tubular packaging film and filled with the fluid packaging material. Further, means for squeezing the tubular packaging film, transverse sealing means for acting on the tubular packaging film to form a transverse seal, and filling of the fluid packaging material into the tubular packaging film to formation of the transverse seal A controller for controlling the wrapping operation, wherein the controller controls the feeding means in accordance with the filling amount of the flowable package to feed the cylindrical packaging film, and the squeezing means serves as the cylindrical packaging film. Advance to a position where a predetermined gap is left, and squeeze the tubular packaging film filled with the flowable package, and the gap with the flowable package. For this purpose, the flow means comprises reversely actuating the feeding means, closing the gap and causing the transverse sealing means to act on the portion of the cylindrical packaging film in a state where the fluid package in the gap is pushed away. The present invention relates to a filling and packaging machine for functional packaging.
[0015]
According to the filling and packaging method and filling and packaging machine of the fluid packaging material, when the fluid packaging material is filled into the cylindrical packaging film, the ironing means is pressed against the cylindrical packaging film. The packaging film is fed back in that state, and the fluid package packed inside is squeezed by the ironing means, and the volume of the bag portion of the cylindrical packaging film filled with the fluid package is reduced. However, the fluid package rises through a narrow gap in the cylindrical packaging film to fill the gap. The portion of the cylindrical packaging film that is creased by the squeezing means forms a horizontal seal by the sealing action of the horizontal sealing means in a state where the fluid package is excluded. Since the ironing operation is performed by the cooperative action of the ironing means and the reverse feed of the cylindrical packaging film, a complicated mechanism is provided to give the ironing means a motion such as a box motion as well as a rotary action like a conventional filling and packaging machine. This is not necessary and contributes to the miniaturization of filling and packaging machines. In addition, since the portion filled with the fluid package is laterally sealed with the fluid package pushed away, a bag package that does not contain gas such as air is produced.
[0016]
In such a fluid-packaging filling and packaging machine, the ironing means includes an ironing body having a through hole into which the lateral seal means can enter. And a sheet-like cover covering at least the through hole on the ironing side of the ironing body. And the lateral sealing means that has entered the through-hole of the ironing body Through the cover Acts on the tubular packaging film. Since the horizontal sealing means penetrates the through hole formed in the ironing body, Front and At the top and bottom, the cylindrical packaging film With cover The state pressed by the ironing body is maintained, and the fluid package does not return into the gap.
[0017]
The cover is formed from a thin metal plate can do . The squeezing means is disposed in the vicinity of the horizontal sealing means, and when the horizontal sealing means is a heat sealing means, the heat becomes high due to the heat. By forming the ironing means from a thin metal plate, deterioration and damage of the cover due to the force and heat transmitted from the lateral sealing means can be avoided.
[0018]
The horizontal seal means is provided with a cutter for cutting the cylindrical packaging film at an intermediate position in the vertical direction of the horizontal seal, and the sheet-like cover has a slit through which the cutter can pass. The Formation can do . If a cutter for cutting the tubular packaging film at the transverse sealing position is provided in the transverse sealing means, the already produced bag package can be cut from the tubular packaging film simultaneously with the transverse sealing operation. In synchronization with the operation of the horizontal sealing means, the cutter passes through the slit formed in the sheet-like cover, reaches the cylindrical packaging film, and cuts the cylindrical packaging film.
[0019]
This Fulfillment of In the filling and packaging machine, the flowable package is a mixture of a liquid and a solid, and the gap has a width that allows passage of the liquid but prevents passage of the solid, and the squeezing means The gap formed by pressing is filled with the liquid when the tubular packaging film is fed backward. Can be . When the fluid package is a mixture of a liquid and a solid, the solid is prevented from rising by the ironing means, so that only the liquid rises into the narrow gap of the cylindrical packaging film. The portion of the cylindrical packaging film that is to be laterally sealed is a gap that has been squeezed by the squeezing means, and no solid matter is present, so that the lateral sealing means does not bite the solid matter.
[0020]
Fluid packaging Fulfillment of In the filling and packaging machine, before the horizontal seal is formed by the horizontal seal means, the ironing means is further pressed to close the gap filled with the fluid package. be able to . By closing the gap, the flowable package remaining in the gap is pushed away, and when forming a horizontal seal, a cylindrical packaging film that forms a gap and a horizontal seal is to be formed. In this part, the flowable package is eliminated as much as possible, and the formation of a lateral seal is further ensured.
[0021]
In this filling and packaging machine, the feeding means includes a servo motor and a feeding member driven by the servo motor and engaged with the cylindrical packaging film. can do . The servo motor has good controllability of starting, speed, and stopping, and can accurately control the feeding timing and feeding amount of the cylindrical packaging film regardless of the forward and reverse feeding directions.
[0022]
The cylindrical wrapping film is fed along a guide tube, and the feed member sandwiches the tubular wrapping film between the guide tube and is driven by the servo motor. Can be . The feed belt or feed roller feeds the cylindrical packaging film between the guide cylinder by driving the servo motor.
[0023]
Said horizontal sealing means The Consists of a pair of horizontal heat seal bars Shi , A groove extending in the transverse direction of the tubular packaging film on the sealing surface of the transverse heat seal bar The Formation can do . When the pair of horizontal heat seal bars sandwich the cylindrical packaging film that has formed a gap through the sheet-like cover, the portion of the horizontal heat seal bar other than the portion where the concave grooves are formed The horizontal heat seal bar hardly presses the tubular wrapping film at the portion where the groove is formed by pressing strongly. The fluid packaging that remains in the portion of the packaging film where the portion of the horizontal heat seal bar other than the portion where the groove is formed strongly presses is the cylindrical packaging film corresponding to the portion where the groove is formed A quick heat-seal is formed without biting the fluid package.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a filling and packaging method and a filling and packaging machine according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a filling and packaging machine according to the present invention. 2 to 4 are explanatory views of the main part for explaining the operating state of the filling and packaging machine shown in FIG. 1, and FIG. 2 is a diagram illustrating how the ironing means using the filling and packaging machine shown in FIG. FIG. 3 is an explanatory view showing the state of squeezing of the fluid package by reverse feeding of the cylindrical packaging film, and FIG. 4 is an explanatory view showing the state of lateral sealing by the lateral sealing means. FIG. 5 and FIG. 5 are perspective views showing the ironing means.
[0025]
In the filling and packaging machine shown in FIGS. 1 to 5, the cylindrical packaging film 1 is placed along the outer periphery of the guide cylinder 2 by a feeding means described later in a state where the outer side of the guide cylinder 2 is covered with the cylindrical packaging film 1. Sent. In this embodiment, the flowable package is a mixed package consisting of solid A and liquid B. The mixed package is filled into the cylindrical packaging film 1 through the filling tube 3 arranged in the guide tube 2. The filling pipe 3 is provided with filling means including a tank for supplying a fixed amount, a pump (not shown) and the like on the upstream side. The tubular wrapping film 1 can be formed from a web-shaped wrapping material by means of vertical sealing means by a tube forming former (not shown), but is not limited thereto, and can be formed by other methods.
[0026]
The feeding means 4 for feeding the cylindrical packaging film 1 downward is configured to sandwich the cylindrical packaging film 1 between the guide cylinder 2 and the side of the guide cylinder 2. In FIG. 1, only one feed belt means 5 is drawn in FIG. 1 while sandwiching and feeding the cylindrical packaging film 1 with respect to the guide cylinder 2, but at the opposite position in the diameter direction of the guide cylinder 2. A similar belt means 5 is also provided. Each feeding means 5 is driven synchronously and feeds and unwinds the cylindrical packaging film 1 along the guide tube 2.
[0027]
Each feed belt means 5 includes a servo motor 6 and a feed member that is driven by the servo motor 6 to feed the cylindrical packaging film 1. The feeding member includes a driving pulley 7, a driven pulley 8 provided in a pair with the driving pulley 7, and a timing belt 9 wound around the driving pulley 7 and the driven pulley 8. As the servo motor 6, a pulse motor that can be operated at an arbitrary timing, has good responsiveness, and can accurately control the feed amount (can be controlled in units of 1 mm) is employed. The timing belt 9 is a belt having meshing teeth that mesh with the pulleys in order to eliminate slippage between the driving pulley 7 and the driven pulley 8, and the outer side of the timing belt 9 has the tubular packaging film 1 on the guide tube 2. In order to make it slide and run, it forms with the material which produces a big frictional force with respect to the cylindrical packaging film 1. FIG. Each feed belt means 5 is pressed against the guide tube 2 by appropriate means.
[0028]
Since the cylindrical packaging film 1 fed out to the front end of the guide cylinder 2 is normally laterally sealed in the preceding packaging cycle, the bottom seal portion 21 of the package has already been formed. Cylindrical packaging is performed by the feeding means 4 by a feeding amount that is predetermined in accordance with the length of one bag package 20 from the bottom seal portion 21, that is, the filling amount of the mixed package composed of the solid A and the liquid B. Film 1 is fed in the forward direction. In relation to this feeding of the tubular packaging film 1, the mixed package is filled into the tubular packaging film 1 in which the bottom seal portion 21 is formed.
[0029]
Below the guide tube 2, a lateral heat sealing means 10 is provided as a lateral sealing means. The transverse heat seal means 10 is composed of a pair of transverse heat seal bars 11 and 11 which are arranged to face each other and have a length extending over the entire width when the tubular packaging film 1 is clamped. Each horizontal heat seal bar 11 includes a heater inside and can reciprocate so as to approach or separate from each other in synchronization. As will be described later, when the horizontal heat seal bar 11 sandwiches the cylindrical packaging film 1 via the sheet-like cover 19, the cylindrical packaging film 1 is welded by the heat transmitted through the cover 19, and the upper seal portion 22 and the bottom seal portion 21 of the next bag are formed, and the bag package 20 in which the mixed package is accommodated is formed. A cutter 12 can be incorporated in the transverse heat sealing means 10. The built-in cutter 12 cuts the bag packaging body 20 from the cylindrical packaging film 1 in synchronism with the timing of the lateral heat sealing by the lateral heat sealing means 10.
[0030]
In relation to the lateral heat sealing means 10, an ironing means 13 comprising a frame plate-like ironing body 14 that can only move forward and backward with respect to the tubular packaging film 1 and a sheet-like cover 19 attached to the ironing body 14 is provided. Has been placed. The cover 19 is attached by appropriate attachment means on at least the side of the ironing body 14 facing the tubular packaging film 1. Therefore, the cover 19 can be moved forward and backward with respect to the tubular packaging film 1 together with the iron body 14 by operating the iron body 14. At the center of each ironing body 14, a through hole 15 having a size that allows the horizontal heat seal bar 11 to enter is formed. Each ironing body 14 has an upper horizontal frame 16 and a lower horizontal frame 17 which are spaced apart in the feeding direction of the tubular packaging film 1 and extend in the transverse direction of the tubular packaging film 1. The frames 16 and 17 are integrally formed by a vertical frame 18 at corresponding end portions.
[0031]
The advancement / retraction of the feeding means 4, the lateral heat sealing means 10, and the ironing body 14 (cover 19) with respect to the tubular packaging film 1 is controlled by a controller (not shown). For example, according to the size of the tubular packaging film 1, The filling amount of the mixed package, the feed amount of the cylindrical packaging film 1, the operation timing of the transverse heat sealing means 10 and the ironing body 14 are controlled. In particular, the lower edge of the lower horizontal frame 17 is preferably formed in a smooth rounded or curved shape so that the cover 19 can be smoothly attached and the cylindrical packaging film 1 is not damaged.
[0032]
When the horizontal heat sealing means 10 and the squeezing means 13 are in the standby position, that is, the retracted non-operating position, the bottom seal portion 21 of the bag has already been formed at the tip of the cylindrical packaging film 1 by the previous horizontal sealing operation. Therefore, the mixed package is filled into the cylindrical packaging film 1 sent by the feeding means 4 through the filling tube 3. As shown in FIG. 2, the feed amount of the cylindrical packaging film 1 and the filling amount of the mixed package are such that the liquid level C of the mixed package is positioned below the ironing means 13 in the filled state. It is controlled by. The squeezing means 13 has a slight gap 23 so that the tubular packaging film 1 is not completely flattened in a state where the transverse heat seal means 10 is in an inoperative state, i.e., the pair of transverse heat seal bars 11 is retracted. Advance to the position to leave. The gap 23 is set so as to allow air or liquid B of the mixed package to pass through but not allow the solid A of the mixed package to pass through. Therefore, the size of the gap 23 can be variably set such that the position of the stopper that defines the most advanced position of the ironing body 14 can be changed depending on the type of the mixed package. preferable.
[0033]
In the state shown in FIG. 2 in which the ironing means 13 has advanced toward the cylindrical packaging film 1, the controller controls the feeding means 4 to reversely feed the cylindrical packaging film 1 in the direction indicated by the arrow E (FIG. 3). Due to the reverse feed of the tubular packaging film 1, the volume of the tubular packaging film 1 is reduced on the side to be the bag packaging body 20. Air or liquid B that has entered the bag packaging body 20 side is allowed to escape to the upper part of the tubular packaging film 1 through the gap 23. Among the mixed packages packed on the bag package 20 side, the solid A cannot pass through the gap 23, so that only the liquid B returns to the upper cylindrical packaging film 1 side through the gap 23. Accordingly, the solid material A is left on the bag package 20 side, the liquid level D of the mixed package moves above the cover 19, and the gap 23 is filled with the liquid B. The horizontal frames 16 and 17 of the ironing body 14 clarify the upper and lower boundaries of the gap 23 to ensure that the solid A is prevented from entering the gap 23 and the liquid level of the liquid B is increased. A limit switch and its actuator (both not shown) are provided in the ironing body 14, and when the ironing bodies 14 and 14 approach and a predetermined gap 23 is formed, the limit switch is turned on and the next process is performed. Can be configured to output a signal for.
[0034]
Next, as shown in FIG. 4, the horizontal heat seal bar 11 of the horizontal heat seal means 10 moves in the direction indicated by the arrow F and enters the through hole 15 of the ironing body 14 to form a gap 23. The tubular packaging film 1 is clamped through the sheet-like cover 19 at the portion. Since the solid A does not exist in the portion of the cylindrical packaging film 1 to be horizontally sealed, the horizontal heat seal bar 11 does not bite the solid A. The horizontal heat seal bar 11 presses the cover 19 to push away the liquid B present in the gap 23, transfers heat through the cover 19, welds the tubular packaging film 1, and the upper seal portion 22 of the bag package 20. The bottom seal portion 21 of the next bag is formed. The cutter 12 is operated in accordance with the sealing operation by the lateral heat sealing means 10, and the bag package 20 is cut from the tubular packaging film 1 by the cutter 12. Thereafter, both the horizontal heat seal bar 11 and the ironing means 13 are retracted to return to the standby position, and the bag package 20 is taken out. If the liquid B has a smooth and low viscosity, it is easy to escape from the gap 23 when the tubular packaging film 1 is sandwiched by the horizontal heat seal bar 11.
[0035]
The ironing body 14 to which the cover 19 is attached is advanced to the extent that the gap 23 is formed, and before the sealing operation by the lateral heat sealing means 10 is started, the ironing body 14 is further advanced to sandwich the cylindrical packaging film 1. The liquid B existing in the gap 23 can be pushed away from the gap 23. By pressing the tubular packaging film 1 with the horizontal heat seal bars 11 and 11 while the liquid B is pushed away from the gap 23, the liquid B is applied to the portions that become the bottom seal portion 21 and the upper seal portion 22 during the horizontal seal operation. It is possible to obtain a horizontal seal that hardly remains.
[0036]
The horizontal heat seal bar 11 becomes high temperature due to the welding of the tubular packaging film 1. Since the cover 19 is clamped by the horizontal heat seal bar 11, the cover 19 is composed of a heat-resistant and fatigue-resistant metal thin plate such as a stainless steel thin plate so as not to be deteriorated by the force and heat transmitted from the horizontal heat seal bar 11. It is preferable to do this.
[0037]
FIG. 6 is an enlarged cross-sectional view for explaining the ironing operation and the lateral sealing operation of the cylindrical packaging film filled with the fluid packaging in the filling packaging machine, and FIG. 7 is the lateral sealing of the filling packaging machine shown in FIG. It is a partial expanded sectional view in operation | movement. In the filling and packaging machine shown in FIG. 6, the squeezing means 13 advances, the cylindrical packaging film 1 filled with the fluid packaging is fed back, and the squeezing operation of the cylindrical packaging film 1 is completed. The state immediately before the horizontal heat seal bar 11 of the sealing means 10 enters the through hole 15 of the ironing body 14 and contacts the cover 19 is shown. A plurality of concave grooves 25 extending in the lateral direction are formed in the sealing surface 24 of the lateral heat seal bar 11. A central concave groove 26 that is wider and deeper than the concave groove 25 is formed at the center in the vertical direction of the horizontal heat seal bar 11, 11, and is formed in the central concave groove 26 of one horizontal heat seal bar 11. The built-in cutter 12 is disposed so as to be able to advance and retreat, and the central concave groove 26 of the other horizontal heat seal bar 11 can receive the cutter 12 which has advanced and cut the cylindrical packaging film 1. The cover 19 is formed with a slit 29 through which the cutter 12 in the cutting operation can be inserted.
[0038]
When the cylindrical packaging film 1 is pressed by the sealing surface 24 of the horizontal heat seal bar 11, the liquid B is sealed even if the liquid B may remain slightly in the gap 23 formed in the cylindrical packaging film 1. It is pushed away from the pressing portion 27 pressed by the surface 24 and quickly escapes to the non-pressing portion 28 corresponding to the concave groove 26 that is not pressed by the sealing surface 24 of the lateral heat seal bar 11. The liquid B that has escaped to the non-pressing portion 28 is shown as a liquid reservoir N. Since the flowable package does not remain in the pressing portion 27 pressed by the seal surface 24, the lateral seal is formed in a reliable manner that does not bite the flowable package.
[0039]
The operation of the filling and packaging machine will be described with reference to the ironing routine shown in FIG. Note that it is assumed that the ironing body 14 is provided with a limit switch that operates when the ironing bodies 14 are close to each other up to a distance corresponding to the predetermined gap 23.
(1) First, when the control routine is started and the feeding means 4, the squeezing means 13 and the transverse heat sealing means 10 are in the non-operating state, the mixed package is put into the cylindrical packaging film 1 through the filling tube 3. Filled (step 1).
(2) The servo motor 6 of the feeding means 4 rotates forward to feed out the cylindrical packaging film 1 (step 2).
(3) When the cylindrical packaging film 1 is drawn out by the length corresponding to the length of one package, the servo motor 6 stops (state shown in FIG. 2, step 3).
(4) The squeezing means 13 starts to move in the operating position, that is, the direction in which the tubular packaging film 1 is sandwiched (step 4).
(5) It is determined whether or not the limit switch is operated (step 5). That is, whether or not the cover 19 of the ironing means 13 has advanced to a predetermined position without being completely crushed by the cover 19, and has shifted to a position where the tubular packaging film 1 is sandwiched with a slight gap 23 left. Determine whether.
(6) When the limit switch is turned on, it means that the ironing means 13 has reached a predetermined position, so that the servomotor 6 is operated in reverse rotation and the ironing operation is executed (the state shown in FIG. 3). Step 6). Only the cylindrical packaging film 1 is pulled back through the slight gap 23 between the squeezing means 13, 13, the solid matter A of the mixed package is pressed by the squeezing means 13, 13, and only the liquid B rises through the gap 23.
(7) The stroke of the ironing operation, that is, the reverse feed amount of the cylindrical packaging film 1 by the servo motor 6 is determined by the feeding amount of the cylindrical packaging film 1 fed by the feeding means 4 and the flowable package to be filled. The reverse rotation of the servo motor 6 is stopped when a predetermined reverse feed is performed based on the amount (step 7).
(8) The ironing means 13 and 13 are further advanced, the cylindrical packaging film 1 is pressed so as to close the gap 23, and the liquid B existing in the gap 23 is pushed away (step 8).
(9) With the covers 19 and 19 sandwiching the tubular packaging film 1, the lateral heat sealing means 10 is operated, and the upper seal portion 21 of the bag package 20 and the bottom seal portion for the next package 22 is formed (state shown in FIG. 4, step 9).
(10) When the upper seal portion 21 of the package 20 and the bottom seal portion 22 for the next package are formed by the transverse heat seal means 10, the ironing means 13, 13 including the covers 19, 19 are inactivated. Return to the position (step 10). Thereafter, the process returns to the main routine to prepare for the production of the next package.
(11) If the limit switch does not operate and remains in the OFF state, it is determined that the solid material A is sandwiched in the gap 23 of the cylindrical packaging film 1, and the process proceeds to step 10 and the ironing is performed. The covers 19 and 19 are returned to the non-operating position to stop the operation.
[0040]
In the above example, the package is described as a mixed package of liquid and solid. However, other fluid substances, that is, the fine solid phase found in the cold storage agent, is dispersed in the liquid. It may be a gel-like fluid substance dispersed in a phase. Moreover, although the position where the squeezing means 13 presses against the cylindrical packaging film 1 has been described as a position further above the upper surface of the mixed package of liquid and solid filled, the package is a gel-like substance or the like. In the case of the fluid package, the portion initially pressed by the squeezing means 13 may be the portion of the tubular packaging film 1 where the fluid package is present as long as it is near the upper surface of the fluid package. .
[0041]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained. That is, this invention Fulfillment of According to the filling and packaging machine, air or other gas is contained in the inside by feeding the cylindrical packaging film and back feeding the cylindrical packaging film for the ironing operation according to the filling amount of the fluid packaging. It is possible to produce a package with no fluid packaging. Moreover, according to the filling and packaging machine of the present invention, the ironing means Has a through hole into which the lateral sealing means can enter A sheet-like cover is provided along with the iron body With the simple structure, the ironing means is held in the operating position. The cylindrical wrapping film is maintained in a state of being pressed over a wide range between the ironing bodies including the range corresponding to the through-hole, Since the ironing operation can be easily obtained by reversing the cylindrical wrapping film, the ironing means performs the rotation operation and the box motion operation. For complex control by controllers This eliminates the need for ironing and simplifies the mechanism. Steps The filling and packaging machine can be further downsized without causing interference with other mechanisms. In addition, if a servo motor is used as the feeding means, the forward and reverse feeds of the cylindrical packaging film can be accurately controlled, so that the feed amount and the ironing size of the cylindrical packaging film to be the package are constant, and the packaging operation The ironing dimensions can be flexibly changed according to the package specifications.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a filling and packaging machine according to the present invention.
FIG. 2 is an explanatory view showing a state in which the cover means using the filling and packaging machine shown in FIG. 1 presses the cylindrical packaging film up to a predetermined gap.
FIG. 3 is an explanatory view showing a squeezing operation state of a fluid package by reverse feeding of a cylindrical packaging film following FIG. 2;
FIG. 4 is an explanatory view showing a lateral seal operation state by the lateral seal means continued from FIG. 3;
5 is a perspective view showing cover means in the filling and packaging machine shown in FIG. 1. FIG.
6 is an enlarged cross-sectional view for explaining the squeezing operation and the lateral sealing operation of the cylindrical packaging film filled with the fluid packaging in the filling and packaging machine shown in FIGS. 1 to 5; FIG.
7 is a partially enlarged cross-sectional view when the filling and packaging machine shown in FIG. 6 is in a horizontal sealing operation.
FIG. 8 is a flowchart showing a packaging process including an ironing process in the filling and packaging machine shown in FIG. 1;
FIG. 9 is an explanatory diagram for explaining a state before starting the ironing operation in the conventional filling and packaging machine.
10 is an explanatory diagram for explaining a state of starting ironing operation in the filling and packaging machine shown in FIG. 9;
FIG. 11 is an explanatory diagram for explaining the ironing operation following FIG. 10;
FIG. 12 is an explanatory diagram for explaining the lateral sealing operation following FIG. 11 and the filling of the mixed package in the next packaging step.
[Explanation of symbols]
1 Cylindrical packaging film
2 guide tube
3 Filling tube
4 Feeding means
5 Feed belt means
6 Servo motor
9 Feed belt (tamming belt)
10 Horizontal heat sealing means
11 Horizontal heat seal bar
13 Cover
14 Frame plate
15 opening
16, 17 horizontal frame
20 Bag packaging
21 Bottom seal
22 Upper seal part
23 Clearance
24 Seal surface
25 groove
26 Central groove
27 Pressing part
28 Non-pressing part
29 Slit
A Solid
B liquid

Claims (4)

Filling means for filling the cylindrical packaging film fed by the feeding means with fluid packaging, and the cylindrical packaging film disposed so as to be movable forward and backward with respect to the cylindrical packaging film and filled with the fluid packaging Squeezing and squeezing means, horizontal sealing means for acting on the tubular packaging film to form a transverse seal, and controlling the packaging operation from filling of the fluid packaging to the tubular packaging film to formation of the transverse seal. A controller,
The ironing means includes a iron body having a through-hole into which the lateral seal means can enter, and a sheet-like cover that covers at least the through-hole on the ironing side of the iron body ,
The controller controls the feeding means according to the filling amount of the flowable package to feed the cylindrical packaging film, and advances the ironing means to a position leaving a predetermined gap in the cylindrical packaging film. The feeding means is reversely operated to squeeze the cylindrical packaging film filled with the flowable package to fill the gap with the flowable package, and the transverse sealing means is passed through the piercing body. Fluidity comprising: entering the hole, closing the gap via the cover, and causing the lateral sealing means to act on the portion of the tubular packaging film in a state in which the fluidity package in the gap is pushed away Packing machine for packing. The horizontal sealing means is provided with a cutter for cutting the cylindrical packaging film at an intermediate position in the vertical direction of the horizontal seal, and the cover is formed with a slit through which the cutter can pass. 2. A filling and packaging machine for fluid packaging according to claim 1 . The controller further advances the squeezing means to close the gap filled with the flowable package in order to push away the flowable package in the gap before the horizontal seal is formed by the horizontal seal means. A filling and packaging machine for a fluid package according to claim 1 or 2 . The said horizontal sealing means is comprised by a pair of horizontal heat seal bar, The concave groove extended in a horizontal direction is formed in the sealing surface of the said horizontal heat seal bar, The any one of Claims 1-3. Filling and packaging machine for fluid packaging according to Item.

Images