JP6507349B2 - Gas filling and packaging machine and inert gas filling method in gas filling and packaging machine - Google Patents

Description

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

  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. 7 or FIG.

  As shown in FIG. 7, 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 delivery process are performed at the first to seventh stations, and then, on the gas filling table 82 side, as shown in FIG. 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, in such a gas filling and packaging machine 80, as the apparatus becomes complicated, the cost increases and the installation area increases. 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 and packaging machine which does not require cleaning and can improve the production capacity.

The above object is achieved by a gas-filled packaging machine for filling an inert gas with a package in a packaging bag, comprising one or more grip pairs for gripping the packaging bag, and a plurality of the grip pairs. A moving body for intermittently moving in each process, a filling machine for filling the package in the packaging bag held by the grip pair intermittently moved by the moving body, and the packing material being filled Space forming means for forming a space for dropping the liquefied inert gas into the vicinity of the inner bottom of the bag inserted into the packaging bag, and a space for dropping the liquefied inert gas is formed A liquefied gas dropping device for dropping the inert gas liquefied in the packaging bag, and a top seal device for sealing the vicinity of the opening of the packaging bag filled with the package and the inert gas liquefied. have, before The space forming means includes a push rod which descends to the vicinity of the inner bottom portion of the packaging bag filled with the packaged material and then rises and is separated from the packaging bag, and the liquefied gas dropping device The gas filling and packaging machine is characterized in that the inert gas liquefied is dropped into the space formed in the packaging bag after the push rod is lifted and separated from the packaging bag. is there.

The liquefied gas dropping device may be a liquid nitrogen dropping device, and the push rod of the space forming means may be a liquid nitrogen dropping nozzle of the liquid nitrogen dropping device. It is preferable that the gas filling and packaging machine has a temporary sealing device that seals in a state in which a part near the bag opening of the packaging bag filled with the packaged material and the liquefied gas is opened. The gas filling and packaging machine preferably includes a heating device for promoting the vaporization of the liquefied inert gas dropped into the packaging bag. It is preferable that the gas filling and packaging machine has a bag bottom vibrating device that vibrates the bottom of the package and the packing bag filled with the inert gas liquefied. The gas filling and packaging machine preferably includes a bag shaping device for shaping the packaging bag inflated by the vaporization and expansion of the liquefied inert gas.

Further, in order to achieve the above object, the filling step of filling the package in the packaging bag, and the liquefied inert gas dropped near the inner bottom of the bag in the packaging bag filled with the package. A space forming process for forming a space, a liquefied gas dropping process for dropping the liquefied inert gas into the space in the packaging bag, and the packaging bag filled with the packaged material and the inert gas And sealing the top sealing step , wherein the space forming step rises after the push rod descends to the vicinity of the inner bottom portion of the packaging bag filled with the package, and is lifted off the packaging bag And thereafter, the liquefied gas dropping device is performed by dropping the liquefied inert gas into the space formed in the packaging bag by the push rod. By the filling method That.

  In the gas filling method in the gas filling and packaging machine, sealing is performed in a state in which a part in the vicinity of a bag opening of the packaging bag filled with the package and the liquefied inert gas is opened before the top sealing step. It is preferable to have a tacking sealing process. The gas filling method in the gas filling and packaging machine preferably includes a heating step for promoting the vaporization of the liquefied inert gas dropped into the packaging bag. The gas filling method in the gas filling and packaging machine preferably includes a bag bottom vibration step of vibrating a package and a bottom portion of the packaging bag filled with the liquefied inert gas. The gas filling method in the gas filling and packaging machine preferably includes a bag shaping step of shaping the packaging bag inflated by the vaporization and expansion of the liquefied inert gas.

According to the gas filling and packaging machine of claim 1 or 2 , the apparatus can be simplified, the installation area can be narrowed, and the packaging cost can be reduced, and even a lightweight package for gas filling from the packaging bag There is no spouting, cleaning due to it is unnecessary, and the production capacity can be improved.
According to the gas filling and packaging machine of the third aspect, the vaporization of liquefied gas such as frozen liquid nitrogen is promoted to accelerate the expansion so that the flow of gas such as nitrogen gas is generated in the packaging bag and the air is effectively generated. It acts to push it out, which can further improve the production efficiency and the gas replacement rate.
According to the gas filling and packaging machine of the fourth 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 fifth aspect, the expanded packaging bag can be shaped by the vaporization and expansion of the liquefied gas.
According to the gas filling method in the gas filling and packaging machine of the sixth aspect, the apparatus can be simplified, the installation area can be narrowed, and the packaging cost can be reduced, and the package can be lightweight even at the time of gas filling. There is no blowout from the bag, and the cleaning resulting from it is also unnecessary, and the production capacity can be improved.
According to the gas filling method in the gas filling and packaging machine of the seventh aspect, by providing a temporary sealing device for sealing in a state in which a part in the vicinity of the bag mouth of the packaging bag is opened, In addition to the reduction in the contact area between the outside and the inside, the inert gas vaporized from the bottom pushes up the air in the packaging bag and pushes it out from the air opening near the mouth of the bag, thereby improving the gas substitution rate. At the same time, 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.
According to the gas filling method in the gas filling and packaging machine according to the eighth aspect, the vaporization of liquefied gas such as frozen liquid nitrogen is promoted to accelerate the expansion so that the flow of gas such as nitrogen gas is generated in the packaging bag and the air Can be effectively pushed to the outside, which can further improve the production efficiency and the gas replacement rate.
According to the gas filling method in the gas filling and packaging machine of the ninth aspect, the air remaining in the gap of the package can be pushed out more reliably.
According to the gas filling method in the gas filling and packaging machine of the tenth aspect, it is possible to shape the packaging bag inflated by the vaporization and expansion of the liquefied gas.

1 is a schematic plan view of an embodiment of the gas filling and packaging machine of the present invention. It is a front view of the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating each packaging process in the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating the gas filling process in the gas filling packaging machine shown in FIG. It is an explanatory view for explaining other examples of a gas filling packing machine of the present invention. It is a description for explaining another example of the gas filling and packaging machine of the present invention shown in FIG. It is explanatory drawing for demonstrating the conventional gas filling packaging machine, (A) is a plane | planar schematic, (B) is a front schematic. It is explanatory drawing for demonstrating the gas filling process in the gas filling packaging machine shown in FIG.

  In the present invention, the grip pair 2 for gripping the packaging bag a, the movable body 3 for intermittently moving the grip pair 2 in each of a plurality of steps, and the grip pair 2 intermittently moved by the movable body 3 And a filling machine 11 for filling the package with the package material held in the package bag a, and for dropping the liquefied inert gas into the vicinity of the inner bottom of the package by inserting it into the package package a filled with the package material. Space forming means 20 for forming space s, liquefied gas dropping device 4 for dropping liquefied inert gas into packaging bag a supported by grip pair 2, packaging bag a filled with packaged material and liquefied gas By having the top seal device 6a, 6b for sealing the vicinity of the mouth of the bag, the device can be simplified, the installation area can be narrowed, the packaging cost can be reduced, and at the time of gas filling, the lightweight packaged Even if it is an object, it blew from the packaging bag Succoth no, was also realized gas filling packaging machine 1 can be improved cleaning also unnecessary production capacity caused thereby.

The gas filling and packaging machine of the present invention will be described with reference to one embodiment shown in FIGS.
The gas filling and packaging machine 1 of this embodiment is a gas filling and packaging machine for filling a package (cutting section) into a packaging bag a and filling it with an inert gas (nitrogen gas), and holds the packaging bag a. One or a plurality of grip pairs 2, a movable body 3 for intermittently moving the grip pairs 2 in each of a plurality of steps, and a packaging bag a gripped by the grip pairs 2 intermittently moved by the movable body 3 A space for forming a space s for dropping a liquefied inert gas (liquefied gas) into the vicinity of the inner bottom of a bag by inserting the packer 11 for filling the package and the package bag a filled with the package A forming means 20, a liquefied gas dropping device 4 for dripping liquefied liquefied inert gas into a packaging bag a supported by the grip pair 2, a bag of a packaging bag a filled with a package and liquefied gas (liquid nitrogen) A temporary seal device 5 for sealing the vicinity of the mouth, and in the packaging bag a A bag shaping device for pressing and shaping the packaging bag a inflated by vaporization and expansion of liquefied gas by heating devices 7a and 7b for promoting vaporization of dropped liquefied gas, bag bottom portion vibrating device 12, and the like 13. A top seal device 6a, 6b for sealing the vicinity of the mouth of the packaging bag a filled with the material to be packaged and the liquefied gas is provided. The respective components will be sequentially described in detail below.

  The gas filling and packaging machine 1 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., bag opening / printing confirmation step (third step), packaged material filling / pushing step (fourth step), space formation (second push) · Blowing off · Out-of-system 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 Momi-Hogoshi (bag bottom vibration) process (Seventh process), Heating, Momi-hogurashi (bag bottom vibration) process (Eight process), Top seal / Sack shaping process (Ninth process), Seal check process (Ninth process) ) To (Step 10) and seal cooling / product discharging step A device for performing the tenth step) of 10 steps.

  As shown in FIG. 1 or 2, the gas filling and packaging machine 1 is provided with a stand 9 rotatably supporting an intermittent rotation shaft 8 extending in the vertical direction on the machine base 10, and the intermittent rotation shaft 8 10 pairs of grips (bag holding means) 2 for holding or releasing the packaging bag a on the moving body (disk-like rotating body) 3 attached to the upper part of the It is provided to project in the radial direction at 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. Although this embodiment is a rotary type packing machine in which the movable body (disk-shaped rotary body) 3 is driven to rotate intermittently, the present invention can be applied to a known linear movement type packing machine.

  The filling machine 11 is for filling the package (a scraping node in this embodiment) in the packaging bag a held by the grip pair 2 which is intermittently moved by the moving body 3 and is shown in FIGS. 1 to 3. As such, it is disposed at the fourth station where the packaged material filling process (fourth process) is performed. The filling machine 11 is a known filling machine, and is configured to act to fill a set amount of shaving nodes for each of the packaging bags a gripped by the grip pair 2 intermittently moved to the fourth station.

  As shown in FIG. 3 or 4, the space forming means 20 is inserted into the packaging bag a filled with the package and drops the liquefied inert gas (liquefied gas) in the vicinity of the inner bottom of the bag. It is for forming the space s. The space formation means 20 of this embodiment is constituted by the second push rod 20 as shown in FIG. The second push-in rod 20 is connected to a lifting device (not shown), descends to the vicinity of the inner bottom portion of the packing bag a filled with the package, and then rises and separates from the packing bag a. It is configured to perform an operation. By this series of operations, the second push rod 20 divides the inside of the package (the scraping node) to form a cylindrical space S up to near the bottom of the bag. The space S serves as a space for dropping the liquefied gas dropped from the liquefied gas dropping device 4 so that the liquefied gas can be dropped near the bottom of the bag.

  The reason for providing such space forming means 20 is that the liquefied inert gas has the property of vaporizing explosively at the moment it hits an object (in this case, the scraping node), so If it is dropped, it is possible to explosively vaporize at the bottom of the bag and push up the air of the whole packaging bag a to be discharged from the inside of the packaging bag a. On the other hand, if the space S is not formed, the liquefied gas contacts the scraping node near the upper part in the bag and is explosively vaporized at the upper part, and conversely, the air present in the lower part in the bag is pushed downward. , Can not be discharged from the inside of the packaging bag a.

  The liquefied gas dripping device 4 is for dripping liquefied inert gas into the packaging bag a supported in a vertical posture on the grip pair 2 and, as shown in FIG. 1, the sixth process is performed It is arranged in 6 stations. When the packaging bag a supported in the vertical posture by the grip pair 2 moves intermittently and stops at the sixth station where the sixth process is performed, 0.2 from the opening of the packaging bag a by the liquefied gas dropping device 4 is 0.2. It acts so that about 5 cc of liquefied gas is dropped to the bottom.

  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, since the gas filling and packaging machine of the present invention fills the gas into the packaging bag a by dropping the liquefied gas, the apparatus is simplified because the inert gas is not continuously blown as in the prior art. Installation area can be narrowed, and packaging costs can be reduced. In addition, since the inert gas is not sprayed for a long time from the bag mouth opened at the time of gas filling, even a lightweight packaged object does not blow out from the packaging bag, cleaning due to it is unnecessary, and the production capacity is further improved. be able to.

  Although the liquefied gas dropping device 4 of the gas filling and packaging machine 1 of this embodiment is a liquid nitrogen dropping device, the present invention is not limited to this, and a liquefied gas dropping method in which a liquefied gas which has liquefied an inert gas is dropped. The arrangement of the apparatus is broadly included in the scope of the present invention. In addition, although the space forming means in the gas filling and packaging machine 1 of this embodiment is constituted by the second push rod 20 described above, the one in which the liquid nitrogen dropping nozzle of the liquid nitrogen dropping device is a space forming means It is included in the category of the invention. Specifically, the liquid nitrogen dropping nozzle is connected to the lifting device, and descends to the vicinity of the inner bottom portion of the packaging bag filled with the package to drop liquefied gas, and then rises and is separated from the packaging bag a The same effect can be obtained even when configured to perform the following operations, and such is also included in the scope of the present invention.

  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. Since the gas filling and packaging machine 1 of the present invention has such a temporary sealing device 5, in addition to the reduction of the contact portion between the outside and the inside of the packaging bag a at the time of gas filling, the inert gas vaporized from the bottom part While pushing up the air in the packaging bag a and pushing it out from the air opening near the mouth of the bag, it is possible to further improve the gas substitution rate, and by making the air opening small, lightweight objects such as shaving nodes However, it is possible to further suppress spouting from the packaging bag.

  The tack seal device 5 of this embodiment, as shown in FIG. 1, is disposed at the seventh station where the seventh step is performed, and is supported by the grip pair 2 as shown in the seventh step of FIG. The packaging bag a has a pair of sandwiching members 5a and 5b which sandwich and seal the vicinity of the bag opening from the front and back of the packaging bag a. 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 device 7 is for promoting the vaporization of the liquefied gas dropped into the packaging bag a, and as shown in FIG. 4, the seventh and eighth stations where the seventh and eighth steps are performed. Are arranged respectively. The heating device 7 has a pair of heat blocks 7a and 7b disposed to face the lower portion of the packaging bag a supported by the grip pair 2 at predetermined intervals from the front and back.

  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.

  The gas filling and packaging machine 1 having such a heating device 7 accelerates the vaporization of liquefied gas such as frozen liquid nitrogen and accelerates expansion to generate a flow of gas such as nitrogen gas in the packaging bag a. It works to push air out effectively, which can further improve production efficiency and gas replacement rate.

  The bottom vibration device 12 is for vibrating the bottom portion of the packaging bag a to push out the air remaining in the gap of the package, and as shown in FIG. It is respectively arrange | positioned at the 7th and 8th station where a process is performed. The bottom vibration device 12 includes a vibration receiver 12a, a vibrating bar (not shown) connected to the vibration receiver 12a, and reciprocating means (not shown) for reciprocating the vibrating bar. The bottom portion of the packaging bag a can be vibrated by vibrating the vibration receiver 12a.

  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 sides, and as shown in FIG. 4, is disposed at the ninth station where the ninth step is performed. It has a pair of bag shaping plates 13a and 13b which respectively press near the middle part of the packaging bag a supported by the grip pair 2 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), and the packaging bag a is shaped In the state, the vicinity of the bag mouth is sandwiched and sealed by the pair of sandwiching members 6 a and 6 b of the top seal device 6.

  The top seal device 6 is for sealing the package material a and the packaging bag a filled with the inert gas near the mouth of the bag, and as shown in FIG. 1 or 4, the ninth step is performed. A pair of holding members (horizontal bars) 6a and 6b are disposed at the station and hold and seal the vicinity of the bag opening from the front and back of the packaging bag a supported by the grip pair 2, respectively. The pair of holding members 6a and 6b are constituted by 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 ninth station where the ninth process is performed By sandwiching the pair of sandwiching members 6a and 6b, the sandwiching portion is sealed.

  As described above, the gas filling and packaging machine 1 of the present invention has the liquefied gas dropping device 4 for dropping liquefied inert gas into the packaging bag a supported by the grip pair 2, thus simplifying the device. The installation area can also be reduced to about half that of the conventional machine, and packaging costs can be reduced. Further, since the long-time gas blowout into the packaging bag a is not performed, even a lightweight packaged object such as a shaving node does not blow 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, it can be performed in a short time, and the production capacity can also be improved.

Below, the other Example in the tacking seal apparatus of the gas filling packaging machine of 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. A gas-filled packaging machine having a pair of sandwiching members 15a and 15b of such a temporary sealing device is also included in the scope 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. A gas-filled packaging machine having a pair of sandwiching members 25a, 25b of such a temporary sealing device is also included in the scope 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 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.

Below, the inert gas filling method in the gas filling packaging machine 1 of this invention is demonstrated.
The inert gas filling method in the gas filling and packaging machine 1 includes a filling step of filling the package in the packaging bag a, and an inert gas liquefied in the vicinity of the inner bottom of the package bag a in which the package is filled. A space forming process for forming a space s for dropping the liquid, a liquefied gas dropping process for dripping liquefied inert gas into the space s in the packaging bag a, and a packaging bag a filled with the material to be packaged and the liquefied gas A temporary sealing process of sealing in a state in which a part near the bag mouth is opened, a heating process of promoting vaporization of liquefied gas dropped in the packaging bag a, and a bottom portion of the packaging bag a vibrate A bottom vibration step, a bag shaping step of pressing and shaping the packaging bag a inflated by vaporization and expansion of the liquefied gas from the front and back sides, a top sealing step of sealing the package and the packaging bag a filled with the inert gas have. Each of the steps will be sequentially described in detail below.

  The filling step (fourth step) of filling the package with the package in the packaging bag a is performed at the fourth station where the filling machine 11 is disposed. The filling machine 11 fills the package (a scraping node in this embodiment) in the packaging bag a gripped by the grip pair 2 which is intermittently moved by the moving body 3 and, in this process, known filling is performed. A set amount of shaving nodes is filled for each packaging bag a held by the grip pair 2 by the machine. Further, in the fourth step, a pressing step is performed. Specifically, as shown in FIG. 1 to FIG. 3, after filling the package with the filler 11, the package is pushed into the packaging bag a by the first push rod 19.

  In the space forming step (fifth step) of forming a space s for dropping the liquefied inert gas in the vicinity of the inner bottom portion of the packaging bag a filled with the package, the space forming means 20 is disposed. It takes place at the 5th station. The space forming means 20, as shown in FIG. 3 or FIG. 4, forms a space s for inserting into the packaging bag a filled with the package and dropping the liquefied inert gas near the bottom of the bag. It is to do. The space formation means 20 of this embodiment is constituted by the second push rod 20 as shown in FIG. The second push-in rod 20 is connected to a lifting device (not shown), descends to the vicinity of the inner bottom portion of the packing bag a filled with the package, and then rises and separates from the packing bag a. It is configured to perform an operation. By this series of operations, the second push rod 20 divides the inside of the package (the scraping node) to form a cylindrical space S up to near the bottom of the bag. The space S serves as a space for dropping the liquefied gas dropped from the liquefied gas dropping device 4 so that the liquefied gas can be dropped near the bottom of the bag.

  The reason for providing such space forming means 20 is that the liquefied inert gas has the property of vaporizing explosively at the moment it hits an object (in this case, the scraping node), so If it is dropped, it is possible to explosively vaporize at the bottom of the bag and push up the air of the whole packaging bag a to be discharged from the inside of the packaging bag a. On the other hand, if the space S is not formed, the liquefied gas contacts the scraping node near the upper part in the bag and is explosively vaporized at the upper part, and conversely, the air present in the lower part in the bag is pushed downward. , Can not be discharged from the inside of the packaging bag a. In the fifth step, a blow-off and extra-system discharge step is performed. Specifically, the package attached to the periphery of the bag mouth is blown away by a blow-off device (not shown), and the packaging bag a determined to be defective in the printing inspection of the third step is discharged out of the system. To be done.

  The liquefied gas dropping step of dropping the liquefied inert gas into the packaging bag a is performed at the sixth station where the liquefied gas dropping device 4 is disposed. 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 the sixth step, as shown in FIG. 4, when the packaging bag a supported in the vertical posture by the grip pair 2 is intermittently moved and stopped at the sixth station, the liquefied gas dripping device 4 is For example, about 0.2 to 5 cc of nitrogen gas (liquefied gas) is dropped to the bottom of the bag by the liquefied gas dropping device (liquid nitrogen dropping nozzle) 4b.

  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.

  A temporary sealing step of sealing in a state in which a part around the bag mouth of the packaging bag a filled with the package and the liquefied gas is opened is performed at the seventh station where the temporary sealing device 5 is disposed. 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 process for promoting the vaporization of the liquefied gas dropped into the packaging bag a is performed at the seventh and eighth stations in which the heating device 7 is disposed. 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.

  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 vibrating step of vibrating the bottom of the packaging bag a is performed at the seventh and eighth stations where the bag bottom vibrating device 12 is disposed. 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.

  A bag shaping step 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. 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 top seal device 6 is disposed. 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.

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) to perform printing inspection while opening, packaged material filling and pushing process (4th process), space formation (2nd pushing), blowout and out-of-system discharging process (5th process) Process), liquefied gas dropping process (sixth process), temporary sealing seal, heating, rubbing (sack bottom vibration) process (seventh process), warming, rubbing (sack bottom vibration) process (step 8) Top seal and bag shaping process (ninth process), seal check process (ninth process) to (tenth process) and seal cooling and product discharging process (tenth 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.

  Package filling and pushing process (fourth process), space forming process (second pushing), blow-off, ex-system discharge process (fifth process), liquefied gas dropping process (sixth process), temporary seal and heating · Momi-Hogoshi (bag bottom vibration) process (step 7), heating · Momi-hogushi (bag bottom vibration) process (eighth process) and top seal · bag shaping process (ninth process) are shown in Fig. 1 The process is performed at the sixth station to the ninth station, respectively, but 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.

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 filling machine 12 bag bottom part vibration apparatus 13 bag shaping apparatus 14 bag supply conveyor 15 bag supply apparatus 16 printing apparatus 17 Suction cup 18 Camera 19 Push rod 20 Space forming means (second push rod)
21 sensor 22 cooling device a packaging bag space

Claims (10)

What is claimed is: 1. A gas filling and packaging machine for filling an inert gas with a package in a packaging bag, comprising:
One or more grip pairs for gripping the packaging bag;
A moving body for moving the grip pair intermittently in each of a plurality of steps;
A filling machine for filling the package in the packaging bag held by the grip pair intermittently moved by the moving body;
Space forming means for forming a space for dropping the inert gas inserted into the packaging bag filled with the package and liquefied near the inner bottom of the bag;
A liquefied gas dropping device for dropping the liquefied inert gas into the packaging bag in which a space for dropping the liquefied inert gas is formed;
And a top seal device for sealing the vicinity of the mouth of the packaging bag filled with the package and the inert gas liquefied .
The space forming means has a push rod which descends to the vicinity of the inner bottom portion of the packing bag in the packing bag filled with the material to be packed and then lifts away from the packing bag.
The liquefied gas dropping device is configured to drop the liquefied inert gas into a space formed in the packaging bag after the push rod rises and separates from the packaging bag. Features gas-filled packaging machine. The gas filling and packaging machine according to claim 1, wherein the liquefied gas dropping device is a liquid nitrogen dropping device, and the push rod of the space forming means is a liquid nitrogen dropping nozzle of the liquid nitrogen dropping device.   The gas filling and packaging machine according to claim 1, wherein the gas filling and packaging machine has a heating device for promoting the vaporization of the liquefied inert gas dropped into the packaging bag.   The gas according to any one of claims 1 to 3, wherein the gas filling and packaging machine has a bag bottom vibrating device that vibrates the bottom of the packaging bag filled with the package and the inert gas liquefied. Filling and packaging machine.   The gas filling and packaging machine according to any one of claims 1 to 4, wherein the gas filling and packaging machine has a bag shaping device for shaping the packaging bag inflated by the vaporization and expansion of the liquefied inert gas. A filling step of filling the package in the packaging bag;
A space forming step of forming a space for dropping liquefied inert gas in the vicinity of the inner bottom portion of the packaging bag filled with the material to be packaged;
A liquefied gas dropping step of dropping the liquefied inert gas into the space in the packaging bag;
And a top sealing step of sealing the package and the packaging bag filled with the inert gas .
In the space forming step, the push rod descends to the vicinity of the inner bottom portion of the bag in the packaging bag filled with the package, and then rises and separates from the packaging bag.
Thereafter, the liquefied gas dropping device is carried out by dropping the liquefied inert gas into the space formed in the packaging bag by the push rod, and the gas filling method in the gas filling and packaging machine is characterized. .   The inert gas filling method in the gas filling and packaging machine is performed in a state in which a part near the opening of the packaging bag filled with the package and the liquefied inert gas is opened before the top sealing step. The gas filling method for a gas filling and packaging machine according to claim 6, further comprising a temporary sealing step of sealing.   8. The gas filling method according to claim 6, 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. Gas filling method in a packaging machine.   9. The inert gas filling method in the gas filling and packaging machine according to claim 6, further comprising a bottom vibration step of vibrating the package and the bottom of the packaging bag filled with the liquefied inert gas. The gas filling method in the gas filling packaging machine in any one.   10. The inert gas filling method in the gas filling and packaging machine according to any one of claims 6 to 9, further comprising a bag shaping step of shaping the packaging bag inflated by the vaporization and expansion of the liquefied inert gas. Gas filling method in a gas filling and packaging machine.

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