JP2016124556A - Gas filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas filling and packaging machine that can be simplified, also can narrow an installation area, reduce packaging costs, prevent even light-weighted packaged articles from being ejected from a packaging bag when filling the bag with a gas, and further eliminate the necessity of cleaning due to the ejection so as to improve production capability.SOLUTION: A gas filling and packaging machine 1, which is configured to insert packaged articles into a packaging bag a and fill the bag with inert gas, comprises: a singularity or a plurality of grip pairs 2 which hold the packaging bag a; a movement body 3 for moving intermittently the grip pairs 2 for every multiple steps; a liquefied gas dripping device 4 that drips liquefied inert gas into the packaging bag a supported by the grip pairs 2; warming devices 7a and 7b for promoting evaporation of the liquefied gas dripped into the packaging bag a; and top seal devices 6a and 6b for sealing the vicinity of a bag mouth of the packaging bag a filled with the packaged articles and the liquefied gas.SELECTED DRAWING: Figure 4

Description

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

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

  As shown in FIG. 8, the gas filling and packaging machine 80 includes 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 The material filling step and the delivery step 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 step (11th step) by the temporary sealing device 83, the gas nozzle 84 Nozzle insertion process (12th process), gas filling process (13th process to 18th process), unraveling process (12th process to 18th process) by bag bottom vibration device 85, top seal The top seal process (19th process), the seal cooling process (20th process), the seal inspection process and the product discharge process (21st process) by the device 86 are performed in the 11th to 21st stays. I have done in ® down.

  However, in such a gas filling packaging machine 80, as the apparatus becomes complicated, the cost is increased and the installation area is increased. In addition, since the gas blowing time becomes longer to obtain the desired gas replacement (continuous blowing until the 13th to 18th steps), the production capacity is affected, and further, light and easy-to-roll shaving nodes are blown out of the packaging bag. There was a complicated machine cleaning.

Japanese Patent Laid-Open No. 7-96918

  Therefore, the problem of the present invention is that the apparatus can be simplified, the installation area can be reduced, the packaging cost can be reduced, and even a lightweight packaged object is not ejected from the packaging bag at the time of gas filling. An object of the present invention is to provide a gas-filled packaging machine that does not require cleaning and can improve production capacity.

  What achieves the above object is a gas-filled packaging machine that fills a packaging bag with an inert gas together with an article to be packaged, and includes one or a plurality of grip pairs for gripping the packaging bag, and a plurality of grip pairs. A moving body for intermittent movement for each process; a liquefied gas dropping device for dropping the liquefied inert gas into the packaging bag supported by the grip pair; and a liquefied gas dropped into the packaging bag. A gas filling comprising: a heating device for promoting vaporization; and a top seal device for sealing the vicinity of a bag mouth of the packaging bag filled with the article to be packaged and the liquefied gas It is a packaging machine.

  It is preferable that the gas-filled packaging machine has a temporary sealing device that seals in a state where a part near the bag mouth of the packaging bag filled with the wrapping material and the liquefied gas is opened.

According to the gas filling and packaging machine according to claim 1, the apparatus can be simplified, the installation area can be reduced, the packaging cost can be reduced, and even a light packaged item can be ejected from the packaging bag at the time of gas filling. There is no need for cleaning, and the production capacity can be improved.
According to the gas filling and packaging machine according to claim 2, by providing a temporary sealing device for sealing in a state where a part near the bag mouth of the packaging bag is opened, the outside and inside of the packaging bag are filled with gas. In addition to reducing the contact area, the inert gas that evaporates from the bottom pushes up the air in the packaging bag and is pushed out of the air release area near the bag mouth, improving the gas replacement rate and releasing the air By reducing the size of the portion, it is possible to further suppress ejection of a light packaged object such as a shaving node from the packaging bag.

It is the plane schematic diagram of one Example of the gas filling packaging machine of this invention. 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 gas filling process of the gas filling packaging machine shown in FIG. It is explanatory drawing for demonstrating the other Example of the gas filling packaging machine of this invention. It is description for demonstrating the other Example of the gas filling packaging machine of this invention shown in FIG. It is explanatory drawing for demonstrating the other Example of the gas filling packaging machine of this invention. It is explanatory drawing for demonstrating the conventional gas filling packaging machine, (A) is a plane schematic diagram, (B) is a front schematic diagram. It is explanatory drawing for demonstrating the gas filling process of the gas filling packaging machine shown in FIG.

  In the present invention, the grip pair 2 that supports the packaging bag a, the moving body 3 for intermittently moving the grip pair 2 for each of the plurality of steps, and the liquefied inert gas are supported by the grip pair 2. The liquefied gas dropping device 4 dropped into the packaging bag a, the heating device 7 for promoting the vaporization of the liquefied gas dropped into the packaging bag a, and the packaging bag a filled with the packaged product and the liquefied gas And a top seal device 6 for sealing the vicinity of the bag mouth, and by filling the packaging bag a with gas by dropping liquefied gas, the device can be simplified, the installation area can be reduced, and the packaging cost can be reduced. The gas-filled packaging machine 1 can be reduced, and even when a light-weight packaged object is filled with gas, it is not ejected from the packaging bag, and no cleaning is required and the production capacity can be improved.

A gas filling and packaging machine according to the present invention will be described with reference to an embodiment shown in FIGS.
A gas-filled packaging machine 1 according to this embodiment is a gas-filled packaging machine that fills a package bag a with an article to be packaged (shaving node) and fills an inert gas (nitrogen gas), and holds the package bag a. One or a plurality of grip pairs 2, a moving body 3 for intermittently moving the grip pairs 2 for each of a plurality of steps, and a liquefied gas for dropping the liquefied inert gas into the packaging bag a supported by the grip pairs 2. A dripping device 4, a temporary sealing device 5 for sealing the vicinity of a bag mouth of a packaging bag a filled with an article to be packaged and liquefied gas (liquid nitrogen), a top sealing device (main sealing device) 6, and a packaging bag a A heating device (bag lower heating device) 7 for promoting the vaporization of the liquefied gas dropped into the bag and a bag bottom vibration device 12 are provided. Hereinafter, each configuration will be described in detail.

  The gas filling and packaging machine 1 is an apparatus that fills an object to be packaged by opening the bag mouth of the packaging bag a and is filled with an inert gas and sealed. Specifically, as shown in FIG. 1 or FIG. 3, the gas filling packaging machine 1 is a bag feeding process for supplying a packaging bag a into the packaging machine at each station (first to tenth stations) (first stage). Process), printing process for printing the expiration date, etc. (second process), bag mouth opening / printing confirmation process (third process), package filling / pushing process (fourth process), second pushing / blowing / system Outside discharge step (fifth step), liquefied gas dropping step (sixth step) in which liquefied gas (liquid nitrogen in this embodiment) is dropped into the packaging bag a, provisional sealing, heating, and unwinding step ( 7th process), heating / brushing process (8th process), top seal / bag shaping process (9th process), seal check process (9th process) to (10th process) and seal cooling / product discharging process It is an apparatus that performs 10 steps of (10th step)

  As shown in FIG. 1 or FIG. 2, the gas filling and packaging machine 1 is provided with a stand 9 on a machine base 10 that freely supports an intermittent rotary shaft 8 extending in the vertical direction. The movable body (disk-shaped rotator) 3 attached to the upper part of the bag 10 has 10 grip pairs (bag gripping means) 2 for gripping or releasing the packaging bag a at equal angles around the intermittent rotation shaft 8. It is provided so as to protrude in the radial direction at intervals. The grip pair 2 grips the vicinity of both sides of the bag mouth of the packaging bag a and moves intermittently together with the moving body 3 for each packaging process. In addition, although this Example is a rotary type packaging machine which drives the mobile body (disk-shaped rotary body) 3 intermittently, it is also possible to apply this invention to a well-known linear movement type packaging machine.

  The liquefied gas dripping device 4 is for dripping the liquefied inert gas into the packaging bag a supported by the grip pair 2 in a vertical posture. As shown in FIG. 1, the sixth step is performed. Located in 6 stations. When the packaging bag a supported in the vertical posture on the grip pair 2 moves intermittently and stops at the sixth station where the sixth step is performed, the liquefied gas dropping device 4 makes 0.2 by the liquefied gas dropping device 4 from the opening of the packaging bag a. About 5 cc of liquefied gas is dropped at the bottom.

  In this embodiment, the liquefied gas dropping device 4 is a liquid nitrogen dropping device, and the liquefied gas is liquid nitrogen. If liquid nitrogen is dripped at the bottom part of the packaging bag a, it will vaporize and expand | swell to the nitrogen gas of a 700-800 times volume, and nitrogen gas is filled in the packaging bag a.

  As shown in FIG. 2, the liquid nitrogen dropping device 4 has a main body 4a having a control unit and a liquid nitrogen dropping nozzle 4b communicating with the inside of the main body, and the main body 4a is a vacuum heat insulating flexible pipe (not shown). ) Etc. and communicated with a liquid nitrogen tank (not shown).

  As described above, the gas-filled packaging machine of the present invention fills the packaging bag a by dropping the liquefied gas, so that the inert gas does not continue to be blown out for a long time as in the prior art. The installation area can be reduced and the packaging cost can be reduced. In addition, since inert gas is not blown for a long time from the opening of the bag that is opened when gas is filled, even if it is a light packaged item, it will not be blown out of the packaging bag, and there is no need for cleaning, thereby further improving production capacity. be able to.

  In addition, although the liquefied gas dropping device 4 of the gas filling packaging machine 1 of this Example is a liquid nitrogen dropping device, it is not limited to this, The liquefied gas dropping which drops liquefied gas which liquefied the inert gas is dropped. A device provided with the apparatus is widely included in the scope of the present invention.

  The temporary sealing device 5 is for sealing in a state in which a part near the bag mouth of the packaging bag a filled with an article to be packaged and liquefied gas is opened. Since the gas filling and packaging machine 1 of the present invention has such a tack seal device 5, the contact portion between the outside and the inside of the packaging bag a becomes small at the time of gas filling, and the inert gas that evaporates from the bottom portion is reduced. The air in the packaging bag a is pushed up and pushed out from the air opening part near the bag mouth, so that the gas replacement rate can be further improved, and the air opening part is made small so that a lightweight packaged object such as a shaving node. However, it is possible to further suppress ejection from the packaging bag.

  As shown in FIG. 1, the tack seal device 5 of this embodiment is disposed at a seventh station where the seventh step is performed, and is supported by the grip pair 2 as shown in the seventh step of FIG. A pair of sandwiching bodies 5a and 5b for sandwiching and sealing the vicinity of the bag mouth from the front and back of the packaging bag a are provided. As shown in FIG. 6A, the pair of sandwiching bodies 5a and 5b have heat blocks 5d that are in close contact with the packaging bag a from the front and back of the packaging bag a by a reciprocating mechanism (not shown). And it is comprised so that a clamping part may be sealed when a pair of clamping body 5a, 5b clamps the packaging bag a stopped at the 7th station where a 7th process is performed.

  Further, as shown in FIG. 6A, each of the pair of sandwiching bodies 5a and 5b has a clearance portion 5c for opening a part near the bag mouth of the packaging bag a. This clearance portion 5c is a portion for forming a portion that is not sandwiched and not sealed when the pair of sandwiching bodies 5a and 5b sandwich 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 part 5c is provided near the center of the pair of sandwiching bodies 5a and 5b, and thereby an air release part is formed at the center part near the bag mouth of the packaging bag a. The existing air is more reliably pushed out.

  Further, as shown in FIG. 6A, the pair of sandwiching bodies 5a and 5b has a bottom portion 5e that gradually rises toward the clearance portion 5c. Thereby, since the air which exists in the inside of the packaging bag a moves to an air release part along the bottom part 5e of a pair of clamping body 5a, 5b, the air in the packaging bag a is pushed out more reliably outside.

  The heating device 7 is for accelerating the vaporization of the liquefied gas dropped into the packaging bag a, and as shown in FIG. 4, the seventh and eighth stations are performed. Respectively. The heating device 7 has a pair of heat blocks 7a and 7b arranged so that the lower part of the packaging bag a supported by the grip pair 2 is opposed to the front and back surfaces with a predetermined distance from each other.

  The pair of heat blocks 7a and 7b are moved from the front and back sides of the packaging bag a to a predetermined position by a reciprocating mechanism (not shown), and after the vicinity of the lower portion of the packaging bag a is heated, the pair of heat blocks 7a and 7b move in a separating direction. 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. In addition, although the surface temperature by the side of the packaging bag a of the heat blocks 7a and 7b changes with the materials of a packaging bag and the kind of dripping liquefied gas, about 50-150 degreeC is suitable.

  Since the gas filling packaging machine 1 has such a heating device 7, the vaporization of the liquefied gas such as frozen liquid nitrogen is promoted to accelerate the expansion, and a gas flow such as nitrogen gas is generated in the packaging bag a. The air can be effectively pushed out to the outside, thereby improving the production efficiency and the gas replacement rate.

  The bag bottom part vibration device 12 is for extruding the air remaining in the gaps of the objects to be packaged by vibrating the bottom part of the packaging bag a, and as shown in FIG. Arranged at the seventh and eighth stations where the process is performed, respectively. The bag bottom vibration device 12 includes a vibration receiver 12a, a vibration rod (not shown) connected to the vibration receiver 12a, and reciprocating means (not shown) for reciprocating the vibration rod. It is comprised so that the bottom part of the packaging bag a can be vibrated by vibrating the vibration receiving body 12a.

  The top seal device 6 is for sealing the packaging bag a filled with the object to be packaged and the inert gas near the bag mouth, and as shown in FIG. 1 or FIG. 4, the ninth step is performed. It has a pair of clamping bodies (horizontal bars) 6a and 6b which are disposed in the station and which seal the packaging bag a supported by the grip pair 2 by sandwiching the vicinity of the bag mouth from the front and back. The pair of sandwiching bodies 6a and 6b are constituted by heat blocks that are in close contact with each other 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 step is performed. The sandwiching portion is sealed by sandwiching the pair of sandwiching bodies 6a and 6b.

  The bag shaping device 13 is for pressing and shaping the packaging bags a inflated by vaporization and expansion of the liquefied gas from the front and back sides, and is arranged at the ninth station where the ninth step is performed as shown in FIG. It has a pair of bag shaping plates 13a and 13b that press the vicinity of the middle portion of the packaging bag a supported by the grip pair 2 from the front and back sides. The pair of bag shaping plates 13a and 13b are configured to press and shape the packaging bag a expanded 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 bodies 6a and 6b of the top seal device 6.

  Thus, the gas-filled packaging machine 1 of the present invention has the liquefied gas dropping device 4 for dropping the liquefied inert gas into the packaging bag a supported by the grip pair 2, thus simplifying the device. The installation area can be reduced to about half that of the conventional machine, and the packaging cost can be reduced. Further, since the gas is not blown out for a long time into the packaging bag a, even a lightweight article to be packaged, such as a shaving node, is not ejected from the packaging bag, and the cleaning due to it is not necessary. Furthermore, since the gas filling is performed by dropping 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 be improved.

Next, other embodiments of the temporary sealing device of the gas filling packaging machine of the present invention will be described in order.
As shown in FIG. 5, the temporary sealing device 5 of the gas filling and packaging machine 1 described above performs a liquefied gas dropping step (sixth step) after the filling process (fourth step and fifth step) of the article to be packaged. Then, as shown in FIG. 5 (A) and FIG. 6 (A), the temporary sealing by the pair of clamping bodies 5a, 5b of the temporary sealing device 5 is performed. As shown in FIG. 6A, each of the pair of sandwiching bodies 5a and 5b has a clearance portion 5c for opening a part near the bag mouth of the packaging bag a. Moreover, this clearance part 5c is provided in the center vicinity of a pair of clamping body 5a, 5b. Furthermore, the pair of sandwiching bodies 5a and 5b has a bottom portion 5e that gradually rises toward the clearance portion 5c.

  On the other hand, the pair of sandwiching bodies 15a and 15b of the temporary sealing device shown in FIGS. 5 (B) and 6 (B) is in a state in which a part near the bag mouth of the packaging bag a is opened. The clearance portion 15c is provided in the vicinity of the center of the pair of sandwiching bodies 15a and 15b, but the bottom portion 15e of the pair of sandwiching bodies 15a and 15b is temporarily extended in the horizontal direction. It differs from a pair of clamping bodies 5a and 5b of the attached sealing device 5. A gas filling and packaging machine having a pair of sandwiching bodies 15a and 15b of such a temporary sealing device is also included in the scope of the present invention. In addition, the air release part formed in the bag mouth vicinity of the packaging bag a is sealed by the top seal apparatus 6 in a 9th process.

  The pair of sandwiching bodies 25a and 25b of the temporary sealing device shown in FIGS. 5C and 6C has a clearance portion for opening a part near the bag mouth of the packaging bag a. Instead, a cutting means (cutter in this embodiment) 25c for forming a perforated portion in which the sandwiching body 25a is in a state in which a portion near the bag mouth of the packaging bag a is opened in the vicinity of the center. A sandwiching body 25b arranged opposite to each other has a guide part (concave part) 25d for receiving cutting means 25c penetrating the packaging bag a and forming a perforated part (instead of the air release part). This is different from the pair of sandwiching bodies 15a and 15b described above. Since the pair of sandwiching bodies 25a and 25b has such a cutting means 25c and a guide part (concave part) 25d, a punched part (an alternative to the air release part) can be easily formed in the packaging bag a, A gas filling and packaging machine having a pair of sandwiching bodies 25a and 25b of such a temporary sealing device is also included in the scope of the present invention. Note that the perforated portion formed in the vicinity of the bag 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 bodies 35a, 35 of the temporary sealing device shown in FIGS. 5 (d) and 6 (d) also has a clearance portion for opening a part near the bag mouth of the packaging bag a. Instead, a cutting means for forming a perforated portion in which the sandwiching body 35a is opened in the vicinity of the bag mouth of the packaging bag a in the vicinity of both sides (notch in this embodiment). The holding body 35b which has 25c and is arranged oppositely has a guide part (concave part) 35d for receiving the cutting means 35c penetrating the packaging bag a and forming a perforated part (instead of the air release part). It differs from the pair of sandwiching bodies 15a and 15b described above. By having such a cutting means 35c and a guide part (concave part) 35d, the pair of sandwiching bodies 35a and 35b can easily form a perforated part (an alternative to the air release part) in the packaging bag a, Moreover, the air which exists in the inside of the packaging bag a can be more reliably pushed outside by providing the punching part (alternative to the air release part) near the bag mouth of the packaging bag a on both sides of the packaging bag a. it can. And the gas filling packaging machine which has a pair of clamping body 35a, 35b of such a tack seal device is also included under the category of the present invention. Note that the two punched portions formed near the bag mouth of the packaging bag a by the cutting means 35c are sealed by the top seal device 6 in the ninth step.

  Further, as shown in FIG. 5, the gas filling and packaging machine 1 described above drops the liquefied gas on the downstream side of the station that performs the step (fourth step and fifth step) of filling the package bag a with the article to be packaged. A step of performing the step (sixth step), as shown in FIG. 7, a step of filling a package bag with an article to be packed on the downstream side of the station where the liquefied gas dropping step (A) is performed. Those provided with a station for performing (B, C) are also included in the category of the gas filling and packaging machine of the present invention.

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 liquefied gas dropping step of dropping the liquefied inert gas into the packaging bag a, a part near the bag mouth of the packaging bag a filled with the packaged product and the liquefied gas. A temporary sealing step for sealing in a state where the portion is opened, a heating step for promoting vaporization of the liquefied gas dropped in the packaging bag a, a bottom vibration step for vibrating the bottom portion of the packaging bag a, A bag shaping step for shaping the packaging bag a inflated by vaporization and expansion of the liquefied gas from the front and back sides, and a top sealing step for sealing the packaging bag a filled with an inert gas and the inert gas. . Hereinafter, each step will be described in detail.

  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 arranged is performed.

  The liquefied gas dropping device 4 is a liquefied gas dropping device for dropping the liquefied inert gas into the packaging bag a supported by the grip pair 2 in a vertical posture. As shown in FIG. 4, when the packaging bag a supported in a vertical posture on the grip pair 2 is intermittently moved and stopped at the sixth station where the sixth step is performed, this step is performed from the opened bag mouth to the liquefied gas. 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) 4b 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. If liquid nitrogen is dripped at the bottom part of the packaging bag a, it will vaporize and expand | swell to the nitrogen gas of a 700-800 times volume, and nitrogen gas is filled in the packaging bag a.

  As shown in FIG. 2, the liquid nitrogen dropping device 4 has a main body 4a having a control unit and a liquid nitrogen dropping nozzle 4b communicating with the inside of the main body, and the main body 4a is a vacuum heat insulating flexible pipe (not shown). ) Etc. and communicated with a liquid nitrogen tank (not shown).

  Thus, in the inert gas filling method in the gas filling packaging machine 1, since the gas is filled in the packaging bag a by dropping the liquefied gas, the inert gas is not continuously blown out for a long time as in the prior art. , The equipment can be simplified, the installation area can be reduced, the packaging cost can be reduced, and even if it is a light package to be packed with gas, it will not be ejected from the packaging bag, and no cleaning is required and the production capacity is also reduced. Can be improved.

  In addition, although the inert gas filling method in the gas filling packaging machine 1 in this Example is liquid nitrogen dripping with the liquefied gas dripping apparatus 4, it is not limited to this, Inert gas other than nitrogen gas Alternatively, a liquefied gas obtained by liquefying may be dropped.

  The seventh sealing step in which the temporary sealing device 5 is arranged is the seventh sealing step in which sealing is performed in a state where a portion near the bag mouth of the packaging bag a filled with the packaged goods and liquefied gas is opened. Done at the station.

  The temporary sealing device 5 is for sealing in a state in which a part near the bag mouth of the packaging bag a filled with an article to be packaged and liquefied gas is opened. In addition to the fact that the inert gas filling method in the gas filling packaging machine 1 has a temporary attachment step by such a temporary attachment sealing device 5, the contact portion between the outside and the inside of the packaging bag a becomes small at the time of gas filling, Inert gas that evaporates from the bottom pushes up the air in the packaging bag a and is pushed out from the air opening portion near the bag mouth, thereby improving the gas replacement rate and reducing the air opening portion to reduce the cutting point. It is possible to further suppress ejection from a packaging bag even with such a light-weight packaged item.

  As shown in the seventh step of FIG. 4, the temporary sealing device 5 includes a pair of sandwiching bodies 5 a and 5 b that sandwich and seal the vicinity of the bag mouth 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 sandwiching bodies 5a and 5b have heat blocks 5d that are in close contact with the packaging bag a from the front and back of the packaging bag a by a reciprocating mechanism (not shown). And it is comprised so that a clamping part may be sealed when a pair of clamping body 5a, 5b clamps the packaging bag a stopped at the 7th station where a 7th process is performed.

  Further, as shown in FIG. 6A, each of the pair of sandwiching bodies 5a and 5b has a clearance portion 5c for opening a part near the bag mouth of the packaging bag a. This clearance portion 5c is a portion for forming a portion that is not sandwiched and not sealed when the pair of sandwiching bodies 5a and 5b sandwich 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 part 5c is provided near the center of the pair of sandwiching bodies 5a and 5b, and thereby an air release part is formed at the center part near the bag mouth of the packaging bag a. The existing air is more reliably pushed out.

  Further, as shown in FIG. 6A, the pair of sandwiching bodies 5a and 5b has a bottom portion 5e that gradually rises toward the clearance portion 5c. Thereby, since the air which exists in the inside of the packaging bag a moves to an air release part along the bottom part 5e of a pair of clamping body 5a, 5b, the air in the packaging bag a is pushed out more reliably outside.

  The heating process for promoting the vaporization of the liquefied gas dropped in the packaging bag a is performed at the seventh and eighth stations where the seventh process and the eighth process are performed. .

  The warming device 7 is for accelerating the vaporization of the liquefied gas dropped into the packaging bag a. As shown in FIG. 4, the vicinity of the lower portion of the packaging bag a supported by the grip pair 2 is viewed from the front and the back. Each has a pair of heat blocks 7a and 7b arranged to face each other at a predetermined interval.

  The pair of heat blocks 7a and 7b are moved from the front and back sides of the packaging bag a to a predetermined position by a reciprocating mechanism (not shown), and after the vicinity of the lower portion of the packaging bag a is heated, the pair of heat blocks 7a and 7b move in a separating direction. 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 packaging machine 1 has such a heating step, vaporization of frozen liquid nitrogen and the like is promoted to accelerate expansion, and a gas flow such as nitrogen gas is generated in the packaging bag a. Thus, the air can be effectively pushed out, and thereby the production efficiency and the gas replacement rate can be further improved.

  The bottom vibration step for vibrating the bottom portion of the packaging bag a is performed at the seventh and eighth stations where the seventh step and the eighth step where the bag bottom vibration device 12 is arranged are performed.

  The bag bottom part vibration device 12 is for extruding the air remaining in the gap of the packaged object by vibrating the bottom part of the packaging bag a, and as shown in FIG. A vibration bar (not shown) connected to the vibration receiving body 12a and a reciprocating means (not shown) for reciprocating the vibration bar are provided. By vibrating the vibration receiving body 12a, the packaging bag a It is comprised so that a bottom part can be vibrated.

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

  The bag shaping device 13 is for pressing and shaping the packaging bag a inflated by the vaporization expansion of the liquefied gas from the front and back sides, 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 that 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 packaging bag a expanded from the front and back of the packaging bag a by a reciprocating mechanism (not shown).

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

  The top seal device 6 is for sealing a packaging bag a filled with an object to be packaged and an inert gas in the vicinity of the bag mouth, and as shown in FIG. 4, the packaging bag a supported by the grip pair 2 It has a pair of clamping bodies (horizontal bars) 6a, 6b that seal the bag mouth from the front and back sides. The pair of sandwiching bodies 6a and 6b have heat blocks that are in close contact with each other from the front and back of the packaging bag a by a reciprocating mechanism (not shown), and the pair of packaging bags a stopped at the ninth station 9 where the ninth step is performed By sandwiching the sandwiching bodies 6a and 6b, the sandwiched portion is sealed.

  As described above, the gas filling method in the gas filling packaging machine 1 is performed by filling the gas by the liquefied gas dropping step of dropping the inert gas liquefied by the liquefied gas dropping device 4 into the packaging bag a supported by the grip pair 2. Since the gas is not blown into the packaging bag a for a long time, the apparatus can be simplified and the installation area can be reduced to about half that of the conventional machine, thereby reducing the packaging cost. Further, since the gas is not blown out for a long time into the packaging bag a, even a light article to be packaged such as a shaving node is not ejected from the packaging bag, and the cleaning due to it is not necessary. Further, since the gas filling is performed by dropping into the packaging bag a by the liquefied gas dropping device 4, it can be performed at a lower cost in a shorter time, and the production capacity can be improved.

Furthermore, each packaging process in the gas filling packaging machine 1 of this invention is demonstrated.
Each packaging process in the gas-filled 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 bag mouth of the packaging bag a. Bag opening / printing confirmation process (third process) for opening and printing inspection (packaging) filling / pushing process (fourth process), second pushing / blowing / exhaust process (fifth process), liquefaction Gas dropping step (sixth step), temporary sealing / warming / brushing step (seventh step), heating / brushing step (eighth step), top seal / bag shaping step (9th step), seal It is a total of 10 processes including a check process (9th process) to (10th process) and a seal cooling / product discharge process (10th process). Hereinafter, each step will be described.

  In the first station shown in FIG. 1, the bag feeding process (first process) is performed by using the bag feeding device 15 to transfer the packaging bags a sequentially conveyed by the bag feeding conveyor 14, as shown in FIGS. 1 to 3. This is done by gripping the grip pair 2 that intermittently moves one by one.

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

  In the bag opening / printing confirmation process (third process), at the third station, as shown in FIG. The opening of the bag is opened, and the print portion is photographed by the camera 18 to inspect the print quality.

  As shown in FIG. 1 to FIG. 3, the packing material filling / pushing process (fourth process) is filled by the filling machine 11 and then packed by the first pushing rod 19 at the fourth station. This is done by pushing the object into the packaging bag a.

  In the second push-in / blow-out / out-of-system discharge step (fifth step), as shown in FIG. 3, the article to be packed is pushed into the back of the packaging bag a with the second push-in bar 20 at the fifth station. The article to be packaged attached to the periphery of the package is blown off by a blow-off device (not shown), and the packaging bag a determined to be defective in the print inspection in the third step is discharged out of the system.

  The liquefied gas dropping step (sixth step), temporary sealing / warming / brushing step (seventh step), warming / brushing step (eighth step) and top seal / bag shaping step (9th step) 1 is performed in the sixth station to the ninth station shown in FIG. 1, but the description is omitted because it is as described in the gas filling method in the gas filling packaging machine 1 described above.

  The seal check process (9th process) for checking the quality of the top seal is performed by checking the quality of the top seal by the sensor 21 shown in FIG.

  As shown in FIG. 3, the seal cooling / product discharge step (tenth step) is cooled by pressing a pair of cooling bars 22a, 22b of the cooling device 22 from the front and back of the packaging bag a as shown in FIG. This is done by discharging the packaging bag a in which the article to be packaged is discharged out of the machine. The series of packaging steps are sequentially performed on the packaging bag a supported by the grip pair 2 that is intermittently moved by the intermittent rotation of the moving body 3, whereby the packaged product of the package is mass-produced.

  In addition, in the packaging process in this gas filling packaging machine 1, the liquefied gas dripping process (6th process) is performed after the process (4th process and 5th process) which fills the packaging bag a with a to-be-packaged object. As shown in FIG. 7, after the liquefied gas dropping step (A), a step (B, C) of filling a package bag with an article to be packaged may be performed.

1 Gas filling and packaging machine 2 Grip pair 3 Moving body (disk-shaped rotating body)
4 liquefied gas dropping device 5 temporary sealing device 6 top sealing device 7 heating device 8 intermittent rotating shaft 9 stand 10 machine base 11 packing material filling machine 12 bag bottom vibration device 13 bag shaping device 14 bag feeding conveyor 15 bag feeding device 16 Printing device 17 Suction cup 18 Camera 19 Push rod 20 Second push rod 21 Sensor 22 Cooling device a Packaging bag

Claims (2)

  A gas-filling packaging machine that fills a packaging bag with an inert gas together with an article to be packaged, and for intermittently moving the grip pair for each of a plurality of steps, and a grip pair for gripping the packaging bag A moving body, a liquefied gas dropping device for dropping the liquefied inert gas into the packaging bag supported by the grip pair, and heating for promoting vaporization of the liquefied gas dropped in the packaging bag A gas filling and packaging machine comprising: a device; and a top seal device for sealing the vicinity of a bag mouth of the packaging bag filled with the packaged material and the liquefied gas.   The said gas filling packaging machine has a temporary sealing apparatus which seals in the state which opened a part near the bag mouth of the said packaging bag and the said packaging bag filled with the said liquefied gas. Gas filling packaging machine.

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