JP2015039357A - Apparatus and method for inert gas-substituted packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and method for inert gas-substituted packaging, capable of a large amount of inert gas substitution at a high substitution ratio; while conventionally encapsulation of bread or sponge cakes in an inert gas such as nitrogen has a low substitution ratio of inert gas due to air bubbles contained in porous bread and sponge cakes, with inadequacy for mass production.SOLUTION: An apparatus 1 for inert gas-substituted packaging includes an inert gas substitution device 1 for gas substitution in a bread 4 to be packaged by repeating decompression in a vacuum chamber 7 and subsequent compression in the vacuum chamber 7 with injection of inert gas at ambient pressure or higher, and a pillow packaging machine 3 for pillow-packaging the gas-substituted article to be packaged. A method for inert gas-substituted packaging includes repeating a plurality of times of the step of decompression and compression of the bread 4 at ambient pressure or higher with decompression in a vacuum chamber 7 and subsequent compression in the vacuum chamber 7 with injection of inert gas.

Description

The present invention relates to an inert gas replacement packaging apparatus and an inert gas replacement packaging method for replacing an inert gas such as nitrogen gas with porous foods such as bread and castella.

  Among foods, breads (confectionery bread, cooked bread, side dish bread, bread etc.) and cakes such as castella do not last for a long time after production, and the flavor falls off day by day. Disposal due to short sales is a problem.

  One of the causes of the above problems is deterioration due to oxidation of bread or the like. As the above-mentioned solution, a method of sealing an inert gas such as nitrogen gas in a packaging bag has been known for a long time.

As a general method for enclosing nitrogen gas, a gas enclosing method using a pillow packaging machine is known. The lateral pillow wrapping machine of Patent Document 1 supplies an article to be packaged in a lateral direction by a supply conveyor, forms a web-shaped packaging material into a cylindrical packaging material with both side edges thereof facing upward by a former, and a center sealer. The cylindrical packaging material is sealed at both side edges, and the cylindrical packaging material that wraps the article to be wrapped is conveyed in a loaded state by a conveyor, and the packaging material is packaged by an end sealer disposed on the downstream side of the center sealer. The cylindrical packaging material that wraps the object is sandwiched and sealed. In the case of food, an air supply pipe opens at the inlet of the cylindrical packaging material, and nitrogen gas can be enclosed in the cylindrical packaging material by feeding an inert gas such as nitrogen gas from the air supply pipe.

  The shelf-wrapping method for bread in Patent Document 2 is to make a small hole in a part of the packaging bag in which the bread is placed and wrap it incompletely. By injecting the active gas into the packaging bag, the air in the packaging bag and the air bubbles of the bread is replaced with the inert gas. A small hole is sealed so that the replacement state can be maintained to complete the packaging, and the bread is sterilized by ultraviolet irradiation immediately before or after packaging.

JP 2004-331136 A JP 2004-57133 A JP 2008-199996 A

  In the case of the horizontal pillow packaging machine of Patent Document 1, since breads are porous and have air bubbles, the substitution rate of the inert gas is poor, and the taste preservation effect by nitrogen substitution is far from it. Moreover, the packaging method of patent document 2 makes a small hole in a part of the packaging bag, and at the same time withdrawing air from the packaging bag through the small hole, at the same time, the inert gas is put into the packaging bag by the differential pressure of the vacuuming. By injecting, air in the air bubbles of the bread is replaced with an inert gas. The packaging method disclosed in Patent Document 2 is not suitable for gas replacement of a large amount of breads, although there are few problems with the replacement rate as described above.

An object of the present invention is to provide an inert gas replacement packaging apparatus and an inert gas replacement packaging method that have a high inert gas replacement rate and can perform a large amount of gas replacement.

The inert gas replacement packaging apparatus accommodates a large number of objects to be packaged in a chamber at a time, depressurizes the chamber, introduces and pressurizes an inert gas, and repeatedly depressurizes and pressurizes the objects to be packaged. An inert gas replacement device for performing the gas replacement, and a pillow packaging machine for pillow-wrapping the gas-substituted packaged object.

In the inert gas replacement packaging method, a large number of objects to be packaged are accommodated in a chamber at one time, and after the inside of the chamber is depressurized, an inert gas is introduced and pressurized, and the object to be packaged is reduced in pressure and above atmospheric pressure. The pressurization is repeated a plurality of times.
According to the present invention, the gas replacement rate is improved by replacing the packaged object with gas by repeating depressurization and pressurization a plurality of times as in the above configuration.

  The inert gas replacement packaging apparatus and the inert gas replacement packaging method have a high inert gas replacement rate and can replace a packaged material with a large amount of gas.

Schematic diagram of belt conveying type inert gas replacement packaging device of the present invention Explanatory drawing which showed the change of the pressure in the vacuum chamber of the inert gas substitution apparatus of this invention Other explanatory drawing which showed the change of the pressure in the vacuum chamber of the inert gas substitution apparatus of this invention Schematic of the whole structure of the 1st bread manufacturing apparatus of this invention Schematic of the whole structure of the 2nd bread manufacturing apparatus of this invention Partial enlarged view of FIG. Partial enlarged perspective view of FIG.

In order to exhibit the effect of gas replacement and obtain a preferable replacement rate (for example, residual oxygen of about 1%) even if there are bubbles that are difficult to replace with gas, a method of evacuating and replacing the gas is preferable. However, if the vacuum is drawn at the packaging speed of the horizontal pillow wrapping machine (for example, 30-40 bags / min) and the gas is replaced, the surface may become wrinkled or cracked due to excessive moisture evaporation and expansion / contraction of the package such as bread. The value of the product will be reduced.

Therefore, in the previous process of the horizontal pillow wrapping machine, for example, an inert gas replacement device that can perform gas replacement processing of a large amount of bread is provided, and multiple stages of low vacuum and gas pressurization processing are performed, so that In order to suppress the reduction of the moisture content, which is the life, as much as possible, and to obtain a high replacement rate, it is processed with an inert gas replacement device. In addition, although a to-be-packaged product is not limited to bread, it demonstrates with bread below. In addition to the horizontal pillow packaging machine, the pillow packaging machine may be a vertical pillow packaging machine, but in the following description, the horizontal pillow packaging machine will be used.

As the inert gas replacement device, a batch type inert gas replacement device and a belt conveyance type inert gas replacement device can be considered. FIG. 1 is a schematic view of a belt conveyance type inert gas replacement packaging apparatus of the present invention. First, the inert gas replacement packaging method of the present invention will be described using the belt conveyance type inert gas replacement packaging apparatus shown in FIG.

Reference numeral 1 in FIG. 1 denotes an inert gas replacement device. An accumulator conveyor 2 is disposed on the downstream side of the inert gas replacement device 1, and a horizontal pillow packaging machine 3 is disposed on the downstream side of the accumulator conveyor 2. Then, the pan 4 which is an article to be packaged is sequentially transported to the upstream inert gas replacement device 1, the accumulator 2, and the horizontal pillow packaging machine 3, and is subjected to gas replacement packaging.

The left side of the belt conveyor unit 5 of the inert gas replacement device 1 is an arrangement region 6 for waiting for the pans before gas replacement is arranged. After the bread is arranged in the arrangement area 6, the belt conveyor unit 5 rotates and is conveyed to the right side and stops. A vacuum chamber 7 is disposed at the upper part of the right side, and a negative pressure chamber 8 is provided inside the belt conveyor unit 5 facing the vacuum chamber 7. Although not shown, the negative pressure chamber 8 is connected to a vacuum pump, and air in the vacuum chamber 7 and the like are sucked from a plurality of suction holes 9 formed in the belt conveyor unit 5 through the negative pressure chamber 8. Aspirate nitrogen gas.

  An inflow path 10 through which humidified nitrogen gas flows is connected to the vacuum chamber 7, and a first control valve 12 is provided in the inflow path 10. An exhaust passage 11 for exhausting nitrogen gas is connected to the negative pressure chamber 8, and a second control valve 13 is provided in the exhaust passage 11. A humidified nitrogen gas generator 14 is shown on the left side of the inert gas replacement device 1. Nitrogen gas stored in the cylinder 15 is blown into the humidifier 16 containing hot water and humidified to a predetermined humidity. The humidifier 16 is provided with a heater 17, and the humidified nitrogen gas is heated to about 80 ° C. and guided into the vacuum chamber 7.

  The pan 4 subjected to gas replacement by the inert gas replacement device 1 is conveyed to the accumulation conveyor 2. This accumulator 2 arranges the pans 4 which are gas-substituted from the inert gas replacement device 1 and are carried out at a time, and sends them to the horizontal pillow packaging machine 3 in a line. However, the accumulation conveyor 2 is not an essential component, and the bread 4 carried out from the inert gas replacement device 1 by an operator may be manually arranged on the horizontal pillow packaging machine 3. The accumulator 2 is similar to the conventional one, but a hood 18 for blowing out nitrogen is disposed on the upper portion of the accumulator 2 so that the gas-substituted pan 4 is exposed to air as much as possible. In order to avoid this, nitrogen gas is blown downward from the hood 18 and covered with nitrogen gas.

The horizontal pillow wrapping machine 3 is the same as a conventional horizontal pillow wrapping machine, in which the pan 4 is conveyed at a predetermined interval, a roll-shaped strip film 19 is fed out, and a web-shaped wrapping material is formed on both side edges by a former 20. The cylindrical packaging material is formed on the cylindrical packaging material in a state where the portion is on the upper side, the both side edges of the cylindrical packaging material are sealed with a center sealer (not shown), and the bread 4 is wrapped by the conveyor 21. The end of the cylindrical packaging material that wraps the pan 4 is sandwiched and sealed by an end sealer (not shown) arranged on the downstream side of the center sealer. The air supply pipe 22 opens at the inlet of the cylindrical packaging material, and the nitrogen gas is enclosed in the cylindrical packaging material by feeding nitrogen gas from the air supply pipe 22. In addition, not only nitrogen gas but also carbon dioxide gas or alcohol gas may be mixed in the cylindrical packaging material for bactericidal purposes.

Next, an inert gas replacement packaging method using the inert gas replacement apparatus 1 will be described. FIG. 2 is an explanatory diagram showing the state of pressure in the vacuum chamber 7. As shown in this explanatory diagram, the vacuum chamber 7 is put on the belt conveyor unit 5 from the state of atmospheric pressure (1 atm), the first and second control valves 12 and 13 are closed, and the negative pressure is reduced. A vacuum is drawn from the pressure chamber 8 through the suction hole 9 and the pressure is reduced to a low vacuum (0.5 atm). After depressurization, the first control valve 12 provided in the nitrogen gas inflow passage 10 is opened, the nitrogen gas humidified from the humidifier 16 is introduced into the vacuum chamber 7, and the inside of the vacuum chamber 7 with the nitrogen gas exceeds the atmospheric pressure. Pressure (1.3 atm). The time from depressurization from atmospheric pressure to 0.5 atm and pressurization to 1.3 atm is 30 seconds.

Thereafter, the first control valve 12 is closed to stop the inflow of nitrogen gas into the vacuum chamber 7, the second control valve 13 is opened to return the inside of the vacuum chamber 7 to atmospheric pressure, and then the second control valve 13 is closed. The negative pressure chamber 8 is again evacuated to reduce the pressure to a low vacuum (0.5 atm). After depressurization, the first control valve 12 is opened to allow nitrogen gas to flow into the vacuum chamber 7 and pressurize to 1.3 atm. The time required for the cycle from the previous 1.3 atm to low pressure over the second 1.3 atm atmospheric pressure is 30 seconds, and 60 seconds have passed since the first atmospheric pressure. Yes.

Further, the second control valve 13 is opened and the vacuum chamber 7 is returned to the atmospheric pressure from the second pressure (1.3 atm) higher than the atmospheric pressure, and then the second control valve 13 is closed and negative. The pressure chamber 8 is again depressurized to a low vacuum (0.5 atm) and pressurized to 1.3 atm, which is equal to or higher than the third atmospheric pressure. This time is also 30 seconds, and 90 seconds have passed since the first atmospheric pressure state.

Finally, the second control valve 13 is opened from the pressurization of 1.3 atmospheric pressure or higher to return the inside of the vacuum chamber 7 to atmospheric pressure, and the inert gas replacement operation is completed. When the pressure is returned from 1.3 atm to the atmospheric pressure, the pan 4 expands for a moment, so that a feeling of plumpness can be obtained. As described above, it is possible to prevent the material temperature from being cooled by repeating the pressurization at a pressure higher than the atmospheric pressure as compared with the general gas replacement method in which the heat of vaporization is taken away for a long time under reduced pressure. Thereafter, the bread 4 is conveyed to the accumulation conveyor 2 as described above, aligned in a line, sent to the horizontal pillow packaging machine 3, and then pillow-wrapped.

As described above, depressurization is repeated 3 times over time, and pressurization over atmospheric pressure is repeated 3 times to suppress moisture dehydration as much as possible, and maintain the moist feeling of pan 4 in combination with humidifying nitrogen gas. . Furthermore, the dent of the bread | pan 4 can be prevented by taking time for pressure reduction and pressurization, and a soft feeling can be maintained. Aiming for an ideal replacement ratio of 1.0% or more while maintaining the moist and soft feeling of bread.

In the above, pressurization (1.3 atmospheres) of breads or higher was performed. However, when the pressure is increased to atmospheric pressure, the substitution rate is more than doubled. That is, when the pressure is up to 1 atm and the depressurization is 0.5 atm, the substitution rate is 2.6%.

That is, assuming that the oxygen remaining in the pan is 20.9% and 50% (0.5 atm / 1.0 atm × 100) of the unsubstitued gas remains in the vacuum chamber 7, the pressure is reduced and applied three times. The following substitution rate is obtained by repeating the pressure.
1st 20.9% × 50% → 10.45%
2nd time 10.45% x 50% → 5.25%
3rd 5.25% × 50% → 2.6%.

On the other hand, when the pressure is increased to 1.3 atm or higher with nitrogen gas and then reduced to 0.5 atm, about 38.46% (0.5 atm / 1.3 atm × 100) unreacted Replacement gas will remain. If this is repeated, it becomes as follows.
1st 20.9% x 38.46% → about 8.04%,
Second time 8.04% x 38.46% → about 3.1%
Third time 3.1% × 38.46% → about 1.19%.
Therefore, a substitution rate of about 2.18 times that of the above method can be obtained. Therefore, in this method, the relative substitution rate can be improved by flowing nitrogen gas at a pressure equal to or higher than atmospheric pressure and continuing it three times.

FIG. 3 is an explanatory view of a second inert gas replacement packaging method in which the method of pressurization is changed. In the second method, in addition to the first method, after the pressure in the vacuum chamber 7 is increased to 1.3 atm as a countermeasure for defective inert gas replacement, the second control valve 13 is opened. The pressure is reduced to atmospheric pressure, and the first control valve 12 is opened while the second control valve 13 is opened so that the nitrogen gas passes through the vacuum chamber 7 (indicated by “P” in FIG. Represents the fluctuation). Thus, by passing the nitrogen gas, the remaining air in the vacuum chamber 7 immediately after pressurization is expelled out of the chamber, and the air in the pan 4 is also smoothly expelled to ensure nitrogen gas replacement. By flowing an inert gas into the vacuum chamber 7 near atmospheric pressure, the gas in the pan that tends to stay can be driven out, and the efficiency of nitrogen gas replacement can be increased. As described above, after passing the inert gas, the pressure is further reduced to a low vacuum, and then the inert gas is introduced and pressurized.

Next, an embodiment in which the inert gas replacement device 1 is applied to a bread manufacturing device will be described. As described above, there are two types of inert gas replacement packaging devices, the batch type inert gas replacement device and the belt conveyance type inert gas replacement device. First, the batch type inert gas replacement device will be described. .

FIG. 4 is a schematic view of the overall configuration of the bread manufacturing apparatus. The bread manufacturing apparatus provided with the batch type inert gas replacement apparatus will be described with reference to FIG. In the following, from the kneading step 30 for kneading flour, yeast, water, salt, sugar, fats and oils, dairy products, etc., the dough is fermented with yeast in the fermentation chamber 31, and the fermented dough is baked in the oven 32. A procedure from gas replacement by the batch type inert gas replacement device 33 to pillow packaging by the pillow packaging machine 34 will be described step by step.

In the kneading step 30 shown in the left end portion of FIG. 4, the flour in the flour tank 301, the yeast in the yeast tank 302, water, salt, sugar, fats, dairy products and the like are fed into the kneader 36 by the pump 35, and the kneader The dough is kneaded at 36 to produce bread dough. The bread dough kneaded by the kneader 36 is pumped to the fermentation chamber 31 side, pushed out from the pumping pipe 37, cut into small pieces, and dropped onto a swing tray 39 (see FIG. 6) provided in the synchronous chain 38. . In the swing tray 39, a plurality of flat plates are installed in the horizontal direction between two parallel synchronous chains 38, and the horizontal swing tray 39 has a predetermined interval across the synchronous chain 38. A large number of them are attached in a space (see Patent Document 3 for the structures of the synchronous chain 38 and the swing tray 39). The individual swing trays 39 are supported by the synchronous chain 38 except for the outlet of the oven pot 32 and maintain the horizontal state to place the bread dough and move in the fermentation chamber 31 and the oven pot 32.

The tip of the pressure feed pipe 37 cuts and removes the bread dough on the swing tray 39 while reciprocating in the lateral direction (depth direction in FIG. 4). The dropped bread dough is placed on a swing tray 39 and circulates in the fermentation chamber 31 up and down over time. The speed of the synchronous chain 38 is set to a speed at which fermentation is completed before the bread dough leaves the fermentation chamber 31. The temperature of the fermentation chamber 31 is controlled so that the bread dough is 27 ° C to 38 ° C suitable for fermentation with yeast. That is, although not shown, an electric resistance element is embedded in the wall of the fermentation chamber 31, and a predetermined temperature suitable for the fermentation chamber 31 is always maintained by the temperature sensor.

The bread dough that has been fermented in the fermentation chamber 31 becomes a porous dough and is conveyed to the oven pot 32 side by the synchronous chain 38. The oven kettle 32 is made of a thick fireproof wall, and a burner 40 is disposed at the lower part of the oven kettle 32, and the inside of the oven kettle 32 is maintained at 220 ° C. to 280 ° C. and the fermented bread dough is baked. .

The baked bread 4 is carried out from the outlet 41 of the oven pot 32, but the baked bread 4 is inverted from the swing tray 39 and falls from the swing tray 39 as shown in FIG. 6. In the bread manufacturing apparatus provided with the batch type inert gas replacement device 33, a cart 42 with casters provided with multi-stage shelves on which the baked bread 4 is placed is arranged at the outlet 41. The bread 4 is placed side by side on the shelf of the attached cart 42. In addition, although not shown in figure, you may comprise so that bread may be arranged in a shelf by an expansion-contraction shuttle conveyor.

The pans 4 arranged on the multistage shelves are carried into the batch type inert gas replacement device 33 by the worker, and the doors are closed. The batch type inert gas replacement device 33 can replace a large number of pans 4 with gas at a time. The chamber of the batch type inert gas replacement device 33 may be configured to receive the cart 42 with casters as it is, or may have a structure in which a shelf portion is received from the cart 42 with casters. .

Since the gas replacement method in the batch type inert gas replacement device 33 is the same as the method described in the inert gas replacement packaging method, the description thereof is omitted. However, FIG. 1 shows a humidified nitrogen gas generator 14 composed of a cylinder 15 filled with nitrogen gas and a small humidifier 16, but in a mass-produced bread manufacturing apparatus such as the present embodiment, Since the cylinder 15 and the small humidifier 16 are not suitable, a nitrogen gas separation device that separates nitrogen gas from the air or a large humidifier that can automatically control humidification of humidity is used.

The pans 4 whose gas replacement has been completed by the batch type inert gas replacement device 33 are arranged at equal intervals on the alignment conveyor 43 of the pillow packaging machine 34 by the caster-equipped carriage 42 by the worker. The alignment conveyor 43 is covered with a hood 44 for blowing out nitrogen gas so that the pan 4 is not exposed to air. By blowing out the nitrogen gas, exposure of the pan 4 after gas replacement to air is suppressed as much as possible.

As will be described later, an accumulator is disposed on the downstream side of the batch type inert gas replacement device 33, and the gas-replaced pans are placed on the accumulator, aligned in a row and sent to the align conveyor 43, and then the pillow packaging. The machine 34 may be pillow-wrapped. It is preferable that a hood for blowing out nitrogen gas is also provided on the accumulation conveyor.

The batch-type inert gas replacement device 33 as described above is suitable when space-saving and switching of a wide variety of breads 4 is necessary. Moreover, the caster-equipped carriage 42 provided with multi-stage shelves can be used as a pre-preparation during gas replacement or as a stock before processing and pillow packaging. When stocking the caster-equipped carriage 42 on which the pan 4 is placed, it is preferable to wait in a nitrogen gas booth so as not to be exposed to air.

Next, the belt conveyance type inert gas replacement device 50 will be described. FIG. 5 is an overall configuration diagram of a bread manufacturing apparatus provided with a belt conveyance type inert gas replacement device 50. Since the kneading step 30, the fermentation chamber 31, and the oven pot 32 are the same as those in the above embodiment, the same reference numerals are used and details are omitted. In the belt conveyance type inert gas replacement device 50 of this embodiment, a vacuum chamber 52 is disposed on a suction belt conveyor 51, and the vacuum chamber 52 is positioned above the suction belt conveyor 51 by a link mechanism 53 (see FIG. 7). The position is moved up and down between the position and the position in close contact with the suction belt conveyor 51.

As shown in FIG. 6, a negative pressure chamber 54 connected to a vacuum pump is provided in the suction belt conveyor 51, and a plurality of suction holes 55 are formed in the suction belt conveyor 51. Although not shown, an exhaust path is connected to the negative pressure chamber 54. The vacuum chamber 52 is evacuated from the negative pressure chamber 54 through the suction hole 55. Furthermore, ribs 56 are formed in the longitudinal direction of the surface of the suction belt conveyor 51 so that the pan 4 rides on the ribs 56 so that the pan 4 does not adhere to the suction belt conveyor 51. Furthermore, a partition 57 is provided on the suction belt conveyor 51 so that the pans 4 can be placed at equal intervals.

A pipe 58 for introducing nitrogen gas is connected to the upper part of the vacuum chamber 52, and is connected to a nitrogen gas generator (not shown). Contrary to the above, nitrogen gas may be introduced from the suction belt conveyor 51 side (suction hole 55) and exhausted from the pipe 58.

Since the inside of the vacuum chamber 52 exceeds the atmospheric pressure during the pressurizing step, a subchamber 59 is provided on the inner peripheral edge of the vacuum chamber 52 in order to prevent nitrogen gas from flowing out during pressurization. Is under negative pressure. The inflow and outflow of nitrogen gas are controlled by a control valve (not shown).

A stock conveyor 60 is provided on the upstream side of the vacuum chamber 52. As shown in FIG. 6, when the pan 4 baked in the oven pot 32 falls from the swing tray 39, it falls onto the stock conveyor 60 and waits until the next gas replacement. As shown in FIG. 6, the swing tray 39 attached to the synchronous chain 38 is normally held horizontally, but in the vicinity of the outlet 41 of the oven pot 32, the pan 4 is stocked by rotating downward. Drop on the conveyor 60.

As shown in FIG. 7, an accumulator 61 is arranged on the downstream side of the belt conveyance type inert gas replacement device 50, and the pans 4 in which the gas is replaced in the vacuum chamber 52 are arranged in a line and sent to the pillow packaging machine 62. Although not shown in FIG. 7, a hood 63 for injecting nitrogen gas is provided on the upper portion of the accumulator 61 to prevent the pan 4 from being exposed to air.

In the above-described embodiment, the example in which the inert gas replacement device 1 is applied to the bread manufacturing apparatus including the kneading process 30, the fermentation chamber 31, and the oven pot 32 has been described. It is not necessary to be a bread manufacturing apparatus for manufacturing. For example, bread baked manually by a baker may be replaced with gas using the inert gas replacement apparatus 1 of the present invention and packaged.

INDUSTRIAL APPLICABILITY The present invention can be applied to a packaging apparatus and a packaging method for replacing an inert gas such as nitrogen gas with porous food such as breads and castella.

DESCRIPTION OF SYMBOLS 1 Inert gas substitution apparatus 2 Accumulation conveyor 3 Horizontal pillow packaging machine 4 Pan 5 Belt conveyor part 6 Arrangement area 7 Vacuum chamber 8 Negative pressure chamber 9 Suction hole 10 Inflow path 11 Exhaust path 12 First control valve 13 Second control valve 14 Humidification nitrogen gas generator 15 Cylinder 16 Humidifier 17 Heater 18 Hood 19 Strip film 20 Former 21 Conveyor 30 Kneading process 301 Flour tank 302 Yeast tank 31 Fermentation chamber 32 Oven kettle 33 Batch type inert gas replacement device 34 Pillow packaging machine 35 Pump 36 Kneader 37 Pressure feed pipe 38 Synchronized chain 39 Oscillating tray 40 Burner 41 Exit 42 Cart with casters 43 Alignment conveyor 44 Hood 50 Inert gas replacement device 51 for belt conveyance Suction belt conveyor 52 Vacuum chamber 53 Link mechanism 54 Negative pressure chamber 55 Suction hole 56 57 partition 58 pipe 59 sub chamber 60 stock conveyor 61 accumulation conveyor 62 pillow packaging machine 63 food

Claims (6)

An inert gas that accommodates a large number of items to be packaged in a chamber, depressurizes the chamber, introduces and pressurizes an inert gas, and repeats depressurization and pressurization to replace the gas to be packaged. An inert gas replacement packaging device comprising a replacement device and a pillow packaging machine for pillow-wrapping a gas-substituted packaged article. The inert gas replacement packaging apparatus according to claim 1, wherein the inert gas replacement apparatus is a batch type inert gas replacement apparatus.   The inert gas replacement packaging apparatus according to claim 1, wherein the inert gas replacement apparatus is a belt-type inert gas replacement apparatus. The inert gas replacement packaging apparatus according to claim 3, wherein an accumulation conveyor is disposed between the inert gas replacement apparatus and the pillow packaging machine. A large number of objects to be packaged are accommodated in the chamber at a time, the inside of the chamber is depressurized, an inert gas is introduced and pressurized, and the package is repeatedly depressurized and pressurized at or above atmospheric pressure multiple times. An inert gas replacement packaging method. After pressurizing above atmospheric pressure, the chamber is once opened and lowered to atmospheric pressure, and the inert gas is allowed to pass through the chamber in an open state, and then the pressure is reduced to a low vacuum. 6. The inert gas replacement packaging method according to claim 5, wherein the process of inflow and pressurization is repeated.

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