JP6507342B2 - Inert gas filling method in gas filling and packaging machine - Google Patents

Description

  The present invention relates to a gas filling method in a gas filling and packaging machine for filling an inert gas such as nitrogen gas with a material to be packaged.

  Conventionally, various gas-filled packaging machines have been proposed, in which an inert gas such as nitrogen gas is filled in the packaging bag together with the material to be packaged and replaced with air in the packaging bag. For example, as such a gas filling and packaging machine, there is a gas filling and packaging machine of Japanese Patent Application Laid-Open No. 7-96918 proposed by the present applicant shown in FIG. 8 or FIG.

  As shown in FIG. 8, this gas filling and packaging machine 80 has a package filling table 81 and a gas filling table 82, and on the package filling table 81 side, a bag feeding process, a bag opening process and a package filling process The object filling process and the delivery process are performed at the first to seventh stations, and then, on the gas filling table 82 side, as shown in FIG. 9, a temporary sealing process (the eleventh process) by the temporary sealing device 83, a gas nozzle 84 Nozzle insertion step (12th step) for inserting the inside of the packaging bag, gas filling step (13th step to 18th step), milling step (12th step to 18th step) by the bag bottom vibrating device 85, top seal The top seal step (19th step) by the device 86, the seal cooling step (20th step), the seal inspection step and the product discharging step (21st step) I have done in ® down.

  However, with such a gas filling method in the gas filling and packaging machine 80, the cost increases and the installation area increases because the apparatus becomes complicated. In addition, the gas blowing time is prolonged to obtain a desired gas replacement (blowing continues to the 13th to 18th steps), which affects the production capacity, and furthermore, a light and easy to rise cutting nodes etc. are spouted from the packaging bag Required complicated machine cleaning.

JP 7-96 918 A

  Therefore, the object of the present invention is that the apparatus can be simplified, the installation area can be narrowed, and the packaging cost can be reduced, and even the lightweight packaged object at the time of gas filling does not blow out from the packaging bag. It is an object of the present invention to provide a gas filling method in a gas filling and packaging machine which does not require cleaning and can improve the production capacity.

In order to achieve the above object, there is provided a liquefied gas dropping step of dropping liquefied inert gas into a packaging bag, and a part of the packaging bag and a portion near the mouth of the packaging bag filled with the package and the liquefied inert gas. And a top sealing step of sealing the packaging material filled with the package and the inert gas, and a temporary sealing step of sealing in an open state ;
The tacking and sealing step includes a pair of holding members having a clearance portion for opening a part of the packing bag near the mouth of the bag and having a bottom portion gradually rising toward the clearance portion. A method for filling an inert gas in a gas filling and packaging machine, which is performed by sandwiching the vicinity of the bag mouth from the front and back of the packaging bag .

  The inert gas filling method in the gas filling and packaging machine preferably includes a heating step for promoting the vaporization of the liquefied gas dropped into the packaging bag. The liquefied gas dropping step may be performed after the step of filling the packaging bag with the package. The liquefied gas dropping step may be performed before the step of filling the packaging bag with the package. The inert gas filling method in the gas filling and packaging machine preferably includes a bag bottom vibration step for vibrating the bag bottom. The inert gas filling method in the gas filling and packaging machine preferably includes a bag shaping step of shaping the package and the packaging bag filled with the inert gas.

According to the inert gas filling method in the gas filling and packaging machine according to claim 1, the apparatus can be simplified, the installation area can be narrowed, and the packaging cost can be reduced, and at the same time, it is a lightweight packaged material for gas filling Also, there is no spouting from the packaging bag, and the cleaning resulting from it is also unnecessary, and the production capacity can be improved.
Moreover, in addition to the contact part of the exterior and interior of a packaging bag becoming small by providing the temporary sealing process sealed in the state which open | released a part of sack mouth vicinity of a packaging bag, the inactive which vaporizes from a bottom part The gas replacement rate can be improved by the gas pushing up the air in the packaging bag and pushing it out of the air opening near the mouth of the bag. Further, by making the air release portion smaller, it is possible to further suppress the spouting out of the packaging bag even for a lightweight packaged object such as a shaving node.
Furthermore, since the air present inside the packaging bag moves to the air release portion along the bottom of the pair of sandwiching members, it can be pushed out more reliably from the air release portion.
According to the inert gas filling method in the gas filling and packaging machine according to claim 2 , the vaporization of liquefied gas such as frozen liquid nitrogen is promoted to accelerate the expansion to generate the flow of gas such as nitrogen gas in the packaging bag Thus, the air is effectively pushed to the outside, which can further improve the production efficiency and the gas replacement rate.
According to the inert gas filling method in the gas filling and packaging machine of the third aspect , it is possible to avoid that the vaporization and expansion of the liquefied gas affect the filling of the package.
According to the inert gas filling method in the gas filling and packaging machine of the fourth aspect , direct contact between the package and the liquefied gas can be avoided.
According to the inert gas filling method in the gas filling and packaging machine of the fifth aspect , the air remaining in the gap of the package can be pushed out more reliably.
According to the inert gas filling method in the gas filling and packaging machine of the sixth aspect , the expanded packaging bag can be shaped by the vaporization and expansion of the liquefied gas.

FIG. 1 is a schematic plan view of an embodiment of a gas filling and packaging machine to which an inert gas filling method in a gas filling and packaging machine of the present invention is applied. It is a front view of the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating each packaging process of the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating the inert gas filling method in the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating the other Example of the inert gas filling method in the gas filling packaging machine of this invention. FIG. 6 is a view for explaining another embodiment of the inert gas filling method in the gas filling and packaging machine of the present invention shown in FIG. 5; FIG. It is explanatory drawing for demonstrating the other Example of the inert gas filling method in the gas filling packaging machine of this invention. It is explanatory drawing for demonstrating the inert gas filling method in the conventional gas filling packaging machine, (A) is the plane | planar schematic of the conventional gas filling packaging machine, (B) is the front schematic diagram. It is explanatory drawing for demonstrating the inert gas filling method in the gas filling packaging machine shown in FIG.

  In the present invention, it has a liquefied gas dropping process of dropping liquefied inert gas into the packaging bag a, and by filling the gas by dropping the liquefied gas, the apparatus can be simplified and the installation area can be narrowed. A gas filling method in a gas filling and packaging machine which can reduce the packaging cost and can prevent the spouting from the packaging bag even if it is a lightweight packaged object at the time of gas filling, and the cleaning resulting from it is also unnecessary. Realized.

The inert gas filling method in the gas filling and packaging machine of the present invention will be described using the gas filling and packaging machine 1 to which the present invention shown in FIGS. 1 to 4 is applied.
The inert gas filling method in the gas filling and packaging machine 1 of this embodiment includes a liquefied gas dropping step of dropping liquefied inert gas into the packaging bag a, and a bag of the packaging bag a filled with the package and the liquefied gas. A temporary sealing step of sealing in a state in which a part near the mouth is opened, a heating step of promoting vaporization of liquefied gas dropped in the packaging bag a, and a bottom portion which vibrates the bottom portion of the packaging bag a Vibration process, bag shaping process of pressing and shaping packaging bag a inflated by vaporization and expansion of liquefied gas from the front and back respectively, and top sealing process of sealing packaging bag a filled with the package and inert gas Have. Each of the steps will be sequentially described in detail below.

  The gas filling and packaging machine 1 to which the present invention is applied is an apparatus for opening the bag mouth of the packaging bag a to fill the package and filling and sealing with an inert gas. Specifically, as shown in FIG. 1 or FIG. 3, the gas filling and packaging machine 1 supplies the packaging bag a into the packaging machine at each of the stations (first to tenth stations). Step), printing step (second step) for printing the shelf life, etc., opening of bag opening / printing confirmation step (third step), filling / pushing-in process for packaged material (fourth step), second pushing / blowing / system Outer discharging step (fifth step), liquefied gas dropping step (sixth step) of dropping liquefied gas (liquid nitrogen in the case of this embodiment) into the packaging bag a, temporary seal, heating, rubbing step ( Seventh step), heating / refining step (eighth step), top seal / bag shaping step (ninth step), seal check step (ninth step) to (tenth step) and seal cooling / product discharging step It is an apparatus which performs 10 steps of (the 10th step)

  Further, as shown in FIG. 1 or 2, the gas filling and packaging machine 1 is provided on the machine base 10 with a stand 9 for rotatably supporting the intermittent rotation shaft 8 extending in the vertical direction, and the intermittent rotation thereof On a moving body (disk-like rotating body) 3 attached to the upper portion of the shaft 8, ten grip pairs (bag holding means) 2 for gripping or releasing the packaging bag a are centered on the intermittent rotation shaft 8 It is provided to project in the radial direction at equal angular intervals. The grip pair 2 holds the vicinity of both sides of the bag mouth of the packaging bag a, and intermittently moves together with the movable body 3 in each packaging process. In addition, although the gas filling packaging machine 1 of this Example to which this invention is applied is a packaging machine of the rotary system which carries out intermittent rotation drive of the mobile body (disk-shaped rotary body) 3, packaging of this invention the known linear movement system It is also possible to apply to a machine.

  The liquefied gas dropping step of dropping the liquefied inert gas into the packaging bag a is performed at the sixth station where the sixth step in which the liquefied gas dropping device 4 is disposed is performed.

  The liquefied gas dripping device 4 is a liquefied gas dripping device for dripping liquefied inert gas into the packaging bag a supported in a vertical posture on the grip pair 2. In this process, as shown in FIG. 4, when the packaging bag a supported in the vertical posture by the grip pair 2 is intermittently moved to stop at the sixth station where the sixth process is performed, liquefied gas is discharged from the opened bag mouth For example, about 0.2 to 5 cc of nitrogen gas (liquefied gas) is dropped onto the bottom of the bag by the liquefied gas dropping device (liquid nitrogen dropping nozzle) 4 b of the dropping device 4.

  The liquefied gas dropping device 4 in this embodiment is a liquid nitrogen dropping device, and the liquefied gas is liquid nitrogen. When liquid nitrogen is dropped to the bottom of the packaging bag a, it vaporizes and expands to nitrogen gas having a volume of 700 to 800 times, whereby the packaging bag a is filled with nitrogen gas.

  As shown in FIG. 2, the liquid nitrogen dropping device 4 has a main body 4a provided with a control unit, and a liquid nitrogen dropping nozzle 4b in communication with the inside of the main body. And the like, and is in communication with a liquid nitrogen tank (not shown).

  As described above, in the inert gas filling method in the gas filling and packaging machine 1, since the packing bag a is filled with the gas by dropping the liquefied gas, the inert gas is not continuously blown as in the prior art. The equipment can be simplified, the installation area can be narrowed, and the packaging cost can be reduced. In addition, even a lightweight packaged product upon gas filling does not spray out from the packaging bag, and the cleaning resulting from it is also unnecessary, and the production capacity is also possible. It can be improved.

  In addition, although the inert gas filling method in the gas filling and packaging machine 1 in this embodiment is to drop liquid nitrogen by the liquefied gas dropping device 4, it is not limited to this, and an inert gas other than nitrogen gas The liquefied gas which liquefied may be dropped.

  In the temporary sealing step of sealing in a state in which a part near the bag mouth of the packaging bag a filled with the packaged material and the liquefied gas is opened, the seventh step in which the temporary sealing device 5 is disposed is performed It takes place at the station.

  The temporary sealing device 5 is for sealing in a state in which a part in the vicinity of the bag opening of the packaging bag a filled with the packaged material and the liquefied gas is opened. The inert gas filling method in the gas filling and packaging machine 1 includes the tacking step by means of such a temporary sealing device 5, thereby reducing the contact between the outside and the inside of the packaging bag a at the time of gas filling, The inert gas vaporized from the bottom pushes up the air in the packaging bag a and pushes it out from the air release portion near the mouth of the bag to further improve the gas substitution rate and reduce the air release portion, and the scraping node Even lightweight objects such as can be further suppressed from spouting from the packaging bag.

  As shown in the seventh step of FIG. 4, the temporary attachment sealing device 5 holds a pair of sandwiching members 5 a and 5 b that sandwich and seal the vicinity of the bag opening from the front and back of the packaging bag a supported by the grip pair 2. Have. As shown in FIG. 6A, the pair of holding members 5a and 5b have heat blocks 5d closely attached to the packaging bag a from the front and back of the packaging bag a by a reciprocating mechanism (not shown). The pair of sandwiching members 5a and 5b sandwich the packaging bag a stopped at the seventh station where the seventh process is performed, whereby the sandwiching portion is sealed.

  Further, as shown in FIG. 6 (A), the pair of holding members 5a and 5b each have a clearance portion 5c for opening a part near the bag opening of the packaging bag a. The clearance portion 5c is a portion for forming a portion which is not held and sealed without being held when the pair of holding members 5a and 5b hold the packaging bag a, and by providing such a clearance portion 5c, The air release portion can be easily formed in the packaging bag a with a simple structure.

  The clearance portion 5c is provided in the vicinity of the center of the pair of sandwiching members 5a and 5b, whereby an air release portion is formed at the center portion of the packaging bag a near the bag mouth. The air present is more reliably pushed out.

  Further, as shown in FIG. 6A, the pair of sandwiching members 5a and 5b have bottoms 5e that gradually rise toward the clearance 5c. Thereby, the air present inside the packaging bag a moves to the air release portion along the bottom 5e of the pair of sandwiching members 5a and 5b, so the air in the packaging bag a is more reliably pushed out.

  The heating step for promoting the vaporization of the liquefied gas dropped into the packaging bag a is, as shown in FIG. 1, the seventh and eighth steps in which the heating device 7 is disposed and the seventh and eighth steps are performed. It takes place at the eighth station.

  The heating device 7 is for promoting the vaporization of the liquefied gas dropped into the packaging bag a, and as shown in FIG. 4, the vicinity of the lower part of the packaging bag a supported by the grip pair 2 is viewed from the front and back A pair of heat blocks 7a and 7b are disposed to face each other at a predetermined interval.

  The pair of heat blocks 7a and 7b approach each other from the front and back sides of the packaging bag a to a predetermined position by a reciprocating mechanism (not shown) and move in the separating direction after heating near the lower part of the packaging bag a. And is configured to return to the initial position.

  The pair of heat blocks 7a and 7b includes a cartridge heater (not shown) and a thermocouple (not shown) for measuring the temperature of the cartridge heater. The surface temperature of the heat blocks 7a and 7b on the side of the packaging bag a varies depending on the material of the packaging bag and the type of liquefied gas to be dropped, but about 50 to 150 ° C. is preferable.

  Since the gas filling method in the gas filling and packaging machine 1 has such a heating step, vaporization of frozen liquid nitrogen and the like is promoted to accelerate expansion, and a flow of gas such as nitrogen gas is generated in the packaging bag a. Thus, the air can be effectively pushed out, which can further improve the production efficiency and the gas replacement rate.

  The bottom vibration process of vibrating the bottom of the packaging bag a is performed at the seventh and eighth stations where the seventh and eighth processes in which the bag bottom vibration device 12 is disposed are performed.

  The bag bottom vibration device 12 is for vibrating the bottom of the packaging bag a to push out the air remaining in the gap of the package, and as shown in FIG. A vibrating bar (not shown) connected to the vibrating receiver 12a and a reciprocating means (not shown) for reciprocating the vibrating bar are provided. The vibrating bag 12a is vibrated to vibrate the packaging bag a. The bottom is configured to be able to vibrate.

  The bag shaping process of pressing and shaping the packaging bag a inflated by the vaporization and expansion of the liquefied gas from the front and back sides is performed at the ninth station where the ninth process is performed.

  The bag shaping device 13 is for pressing and shaping the packaging bag a inflated by the vaporization and expansion of the liquefied gas from the front and back respectively, and as shown in FIG. 4, the packaging bag a supported by the grip pair 2 It has a pair of bag shaping plates 13a and 13b which respectively press the vicinity of the middle part from the front and back. The pair of bag shaping plates 13a and 13b are configured to press and shape the expanded packaging bag a from the front and back of the packaging bag a by a reciprocating mechanism (not shown).

  The top seal process for sealing the package and the packaging bag a filled with the inert gas is performed at the ninth station where the ninth process in which the top seal device 6 is disposed is performed.

  The top seal device 6 is for sealing the package and the packaging bag a filled with the inert gas near the mouth of the bag, and as shown in FIG. A pair of holding members (horizontal bars) 6a and 6b hold and seal the vicinity of the bag mouth from the front and back respectively. The pair of sandwiching members 6a and 6b have heat blocks closely attached from the front and back of the packaging bag a by a reciprocating mechanism (not shown), and the packaging bag a stopped at the station 9 where the ninth process is performed The sandwiching portion is sealed by the sandwiching of the sandwiching members 6a and 6b.

  As described above, the gas filling method in the gas filling and packaging machine 1 is performed by the liquefied gas dropping step in which the inert gas liquefied by the liquefied gas dropping device 4 is dropped into the packaging bag a supported by the grip pair 2. Since the gas is not blown out for a long time into the packaging bag a, the apparatus can be simplified, the installation area can be narrowed to about half that of the conventional machine, and the packaging cost can be reduced. Further, since the long-time gas blowing into the packaging bag a is not performed, even a lightweight packaged object such as a shaving node does not spray out from the packaging bag, and the cleaning resulting therefrom is also unnecessary. Furthermore, since the gas filling is by dripping into the packaging bag a by the liquefied gas dropping device 4, the gas filling can be performed in a short time and at a lower cost, and the production capacity can also be improved.

Below, the other Example in the tacking sealing process of the gas filling packaging machine which applies this invention is described one by one.
The temporary sealing device 5 of the gas filling and packaging machine 1 described above, as shown in FIG. 5, has a liquefied gas dropping step (sixth step) after the filling step (the fourth step and the fifth step) of the package. After that, as shown in FIGS. 5A and 6A, the temporary sealing is performed by the pair of holding members 5a and 5b of the temporary sealing device 5. As shown in FIG. 6 (A), the pair of sandwiching members 5a and 5b each have a clearance 5c for opening a part near the bag opening of the packaging bag a. Further, the clearance portion 5c is provided near the center of the pair of holding members 5a and 5b. Furthermore, the pair of holding members 5a and 5b have a bottom 5e that gradually rises toward the clearance 5c.

  On the other hand, the pair of sandwiching members 15a and 15b of the temporary sealing device shown in FIGS. 5 (B) and 6 (B) is in a state in which a part of the bag mouth of the packaging bag a is opened. The same is true in that the clearance portion 15c of the pair is provided in the vicinity of the center of the pair of sandwiching members 15a and 15b, but the bottom 15e of the pair of sandwiching members 15a and 15b extends in the horizontal direction. It differs from the pair of sandwiching members 5 a and 5 b of the attached sealing device 5. What performs a tacking process by the gas filling packaging machine which has a pair of clamping bodies 15a and 15b of such a tacking seal apparatus is also included in the category of the present invention. The air release portion formed in the vicinity of the bag mouth of the packaging bag a is sealed by the top seal device 6 in the ninth step.

  The pair of sandwiching members 25a and 25b of the temporary sealing device shown in FIG. 5C and FIG. 6C has a clearance portion for opening a part near the bag opening of the packaging bag a. Cutting means (cutter in the case of this embodiment) 25c for forming a perforated portion in a state in which the sandwiching body 25a opens a part near the bag mouth of the packaging bag a instead. A pair of oppositely disposed sandwiching members 25b has a guide portion (concave portion) 25d for receiving the cutting means 25c which penetrates the packaging bag a and forms a perforated portion (a substitute for the air release portion). This point is different from the pair of holding members 15a and 15b described above. With the pair of sandwiching members 25a and 25b having such cutting means 25c and the guide portion (concave portion) 25d, it is possible to easily form a perforated portion (a substitute for the air release portion) in the packaging bag a. What performs a tacking process by the gas filling packaging machine which has a pair of clamping bodies 25a and 25b of such a tacking seal apparatus is also included in the category of the present invention. The perforated portion formed near the mouth of the packaging bag a by the cutting means 25c is sealed by the top seal device 6 in the ninth step.

  The pair of sandwiching members 35a and 35 of the temporary sealing device shown in FIGS. 5 (d) and 6 (d) also have a clearance portion for opening a part near the bag opening of the packaging bag a. Cutting means (notch in the case of this embodiment) for forming a perforated portion in which the sandwiching body 35a opens a part near the bag mouth of the packaging bag a at both sides instead. A guide member (concave portion) 35d for receiving the cutting means 35c which has the 25c and which is disposed opposite to each other and which penetrates the packaging bag a to form a perforated portion (a substitute for the air release portion) It differs from the pair of holding members 15a and 15b described above in the point of having.

  With the pair of sandwiching members 35a and 35b having such cutting means 35c and the guide portion (concave portion) 35d, it is possible to easily form a perforated portion (a substitute for the air release portion) in the packaging bag a. Also, by providing perforations (instead of air release parts) in the vicinity of the mouth of the packaging bag a on both sides of the packaging bag a, the air present inside the packaging bag a can be more reliably pushed out. it can. And what performs a tacking process by the gas filling packaging machine which has a pair of clamping bodies 35a and 35b of such a tacking seal apparatus is also included in the category of the present invention. The two perforated portions formed in the vicinity of the mouth of the packaging bag a by the cutting means 35 c are sealed by the top seal device 6 in the ninth step.

Furthermore, each packaging process in the gas filling packaging machine 1 of this invention is demonstrated.
Each packaging process in the gas filling and packaging machine 1 includes a bag feeding process (first process) for supplying the packaging bag a into the packaging machine, a printing process (second process) for printing the expiration date and the like, and a bag mouth of the packaging bag a. Bag opening and printing check process (3rd process) which performs printing inspection while opening, packaged material filling and pushing process (4th process), second pressing, blowing off, extrasystem discharging process (5th process), liquefaction Gas dripping process (sixth process), temporary seal, heating, rubbing process (seventh process), heating, milling process (the eighth process), top seal, bag shaping process (the ninth process), seal It is all ten steps of a check process (the 9th process)-(the 10th process) and a seal cooling and product discharge process (the 10th process). Each step will be described below.

  In the bag feeding process (first process), at the first station shown in FIG. 1, as shown in FIGS. 1 to 3, packaging bags a sequentially conveyed by the bag feeding conveyor 14 are divided by the bag feeding device 15. It is performed by holding the grip pair 2 which moves intermittently sheet by sheet.

  In the printing process (the second process), at the second station, as shown in FIG. 3, the expiration date etc. are printed by the printing device 16 on the back side of the packaging bag a supported in the vertical posture by the grip pair 2. It is done by.

  In the third step, as shown in FIG. 3, the sucker 17 sucks the front and back surfaces of the packaging bag a supported in a vertical posture by the grip pair 2 in the third opening. This is done by opening the bag mouth and photographing the print portion with the camera 18 to check the quality of the print.

  In the packaged material filling and pushing process (fourth process), as shown in FIGS. 1 to 3 at the fourth station, after the packaged material is filled by the filling machine 11, the first push rod 19 is used to package the packaged material. It is performed by pushing an object into the packaging bag a.

  In the second pushing / blowing / out-of-system discharging step (fifth step), at the fifth station, as shown in FIG. It is carried out by blowing away the to-be-packaged thing adhering to the periphery of B by a blow-off apparatus (not shown), and also discharging | emitting the packaging bag a determined with the defect by the printing inspection of the 3rd process out of system.

  The liquefied gas dropping process (sixth process), the temporary seal, heating, and rubbing process (seventh process), heating and milling process (the eighth process), and the top seal and bag shaping process (the ninth process) This is carried out at the sixth to ninth stations shown in FIG. 1, but it is the same as described in the gas filling method in the gas filling and packaging machine 1 described above, and the description will be omitted.

  The seal check step (ninth step) for checking the quality of the top seal is performed by checking the quality of the top seal with the sensor 21 shown in FIG.

  In the seal cooling and product discharging step (tenth step), as shown in FIG. 3, the top seal portion is cooled while the pair of cooling bars 22a and 22b of the cooling device 22 are pressed from the front and back of the packaging bag a. This is performed by discharging the packaging bag a in which the package is packaged to the outside of the machine. Then, the series of packaging processes are sequentially performed on the packaging bag a supported by the grip pair 2 which is intermittently moved by the intermittent rotation of the movable body 3, whereby the packaged product of the package is mass-produced.

  In the packaging step of the gas filling and packaging machine 1, the liquefied gas dropping step (sixth step) is performed after the steps (the fourth step and the fifth step) of filling the packaged object in the packaging bag a. As shown in FIG. 7, after the liquefied gas dropping step (A), the steps (B, C) may be performed to fill the packaging material in the packaging bag.

1 gas filling and packaging machine 2 grip pair 3 moving body (disk-shaped rotating body)
DESCRIPTION OF SYMBOLS 4 liquefied gas dripping apparatus 5 temporary attachment seal apparatus 6 top seal apparatus 7 heating apparatus 8 intermittent rotating shaft 9 stand 10 machine stand 11 package-filling machine 12 bag bottom part vibrating apparatus 13 bag shaping apparatus 14 bag feeding conveyor 15 bag supplying apparatus DESCRIPTION OF SYMBOLS 16 printing apparatus 17 sucker 18 camera 19 pushing rod 20 2nd pushing rod 21 sensor 22 cooling device a packaging bag

Claims (6)

A liquefied gas dropping step of dropping liquefied inert gas into the packaging bag, and temporarily sealing a part in the vicinity of the bag opening of the packaging bag filled with the package and the liquefied inert gas. A sealing process, and a top sealing process for sealing the package and the packaging bag filled with the inert gas ,
The tacking and sealing step includes a pair of holding members having a clearance portion for opening a part of the packing bag near the mouth of the bag and having a bottom portion gradually rising toward the clearance portion. A method for filling an inert gas in a gas filling and packaging machine, which is performed by sandwiching the vicinity of the bag opening from the front and back of the packaging bag .   The gas filling method according to claim 1, wherein the inert gas filling method in the gas filling and packaging machine has a heating step for promoting the vaporization of the liquefied inert gas dropped into the packaging bag. Inert gas filling method in a packaging machine. The inert gas filling method in a gas filling and packaging machine according to claim 1 or 2 , wherein the liquefied gas dropping step is performed after the step of filling the packaging bag with the package. The inert gas filling method in a gas filling and packaging machine according to claim 1 or 2 , wherein the liquefied gas dropping step is performed before the step of filling the packaging bag with the package. The inert gas filling method in the gas filling and packaging machine according to any one of claims 1 to 4 , wherein the inert gas filling method in the gas filling and packaging machine has a bag bottom portion vibrating step for vibrating the bag bottom portion. . The inert gas filling method in the gas filling and packaging machine according to any one of claims 1 to 5 , further comprising a bag shaping step of shaping the package and the packaging bag filled with the inert gas. Inert gas filling method in a gas filling and packaging machine.

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