JP2001328601A - Packaging method using package bag with spout and sealing device used in the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filling method for filling a liquid material into a packaging bag with a spout through the spout and evacuate air remaining in the packaging bag with the spout. SOLUTION: A liquid (fourth process) is filled out and then compressed air is introduced into the bag 100 and the bag is turned into an expanded state or a swollen state. A spout mouth section 115 is cleaned (fifth process) and dried (sixth process) and air in the bag is substituted with inactive gas such as nitrogen. An inner sealing body 68 is partly welded on a mouth upper of the upper end section 117 (eight process) and by a press plate 81 to deaerate sufficiently the interior of the bag and then the inner sealing body is sealed perfectly (ninth process).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing method using a packaging bag with a spout, and more particularly, to a filling step of filling a liquid material into a packaging bag through a spout opening. The present invention relates to a bag packing method including at least a sealing step of sealing a mouth, and in the sealing step, the inside of the packaging bag is evacuated.

[0002] The present invention also relates to a sealing device for sealing a spout mouth portion, which is used in the above-mentioned bag packing method.

[0003]

2. Description of the Related Art In recent years, for example, packaging bags with spouts, such as soft drinks, have been used. Many of the bags with spouts are provided with flexibility and have a certain rigidity by laminating a material having rigidity on a film made of synthetic resin.

When such a packaging bag is filled with a liquid material such as a soft drink, there is a case where a spout is attached to the bag body and the liquid material is filled into the bag through the spout from a filling nozzle. In this case, the bag expands from below as the filling of the liquid progresses from a flat state where the first front and back sheet portions overlap, but the spout mouth is closed by the nozzle, and air is filled at the time of filling. Do not enter the bag. Therefore, unlike the case where, for example, a flat bag is forcibly opened and filled, a large amount of air does not enter the upper portion of the bag which is not filled with the liquid material. Therefore, conventionally, in this type of packaging, it is usual that the inside of the bag is not evacuated or deaerated after filling the liquid material. However, the spout is naturally provided with a through hole, and when the nozzle is removed after the filling is completed, air enters into that portion, and this does not mean that there is no air in the bag. In addition, depending on the state of the liquid material in the bag, the space may be formed in the upper portion of the liquid material, and the size of the space differs for each bag. Considering the effect on the contents, it is natural that it is desirable to degas even with a small amount of air.

When such a bag is filled with a liquid material, the bag is not completely expanded or swelled even in a portion where the liquid material is present. It is higher than when the bag is completely inflated. When the bag is moved to the subsequent process in this state, the liquid in the bag may be spilled through the spout by impact. As a result, the mouth and the like of the spout are contaminated, which hinders the sealing in the inner sealing step of sealing the opening of the mouth with a thin film in a later process, or the cap is attached while the liquid adheres to the outer peripheral portion, and In such a case, the liquid may be deteriorated, and a hygiene problem may occur. In order to prevent this, the fact is that adjustment is made such as making the moving speed of the bag slower or the like.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and the present invention relates to a filling method for filling a liquid bag through a spout into a packaging bag with a spout. An object of the present invention is to provide a bag packing method in which air remaining in a bag can be removed as much as possible.

Another object of the present invention is to provide a bag packing method in which the liquid level of a filled liquid material in a bag is lowered to prevent the liquid from spilling when the bag is moved. It is an issue of.

It is a further object of the present invention to provide a sealing device which is particularly suitable for carrying out the method.

[0009]

In order to solve the above problems, in the present invention, after filling a liquid material through a spout into a packaging bag with a spout, immediately before closing the mouth of the spout. , Air in the bag was degassed.

After the liquid is filled, air is blown into the bag so that the bag is almost completely inflated.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited to the embodiments described below.

FIG. 1 is a perspective view showing a schematic configuration of an example of a bag packing apparatus for carrying out the bag packing method of the present invention. The apparatus 1 includes a turntable 5 (shown conceptually by a single circle in the figure) provided intermittently rotatable on the machine base 3. At intervals, a plurality of bag holding devices (only the holding member 7 is provided) including the bag holding members 7 for holding the packaging bags 100 are provided.

A packaging bag 100 used in the present embodiment.
Is a front view of FIG. The packaging bag 100 may be similar to a known packaging bag with a spout, and includes a bag body 101 having a certain degree of rigidity and a spout 103 attached to the bag body 101. The spout 103 is the bag body 101 that was originally opened.
The upper edge 101a of the bag body 101 is sealed over the entire length by heat welding. The spout 103 has a substantially cylindrical shape, and is positioned and attached to the bag body 101 using the positioning flange 105. On the upper side, an intermediate flange 107 and an upper flange 109 are provided at a predetermined interval. On the upper side of the upper flange 109, a screw portion 111 to which a cap described later is attached is formed,
In the present embodiment, two double threads 113 are provided symmetrically. The upper side of the screw portion 111 is a slightly narrower mouth portion 115, and an inner seal body described later is attached to the upper end surface 117 thereof. Spout 103
The lower side of the positioning flange 105 is the lower part 11 of the spout.
At 9, it has been inserted into the bag body 101. This bag 10
Reference numeral 0 denotes an intermediate shaft portion 121 between the upper flange 109 and the intermediate flange 107 that fits into a notch or a bag holding portion 7a of the bag holding member 7 whose partial plan view is shown in FIG. , The upper flange 109 is the upper surface 7b of the bag holding member 7.
And is supported in a suspended state.

The lower portion 119 of the spout comprises approximately three parts (see FIGS. 2B and 2B). The welding portion 123 provided below the positioning flange 105 is a cylindrical portion 124
And thin plate-like side projections 125a and 125b extending from the cylindrical part 124 to the opposite side in the diameter direction, respectively. The cylindrical part 124 and the side projections 125a and 125b are provided.
Are welded so that the sheet portions on the front and back of the bag 100 are sandwiched from above and below in the drawing. Formed on the lower side are the cylindrical portion 127, the side protrusion 128a,
128b. The diameter of the cylindrical portion 127 is slightly smaller than the diameter of the cylindrical portion 124 of the welding portion 123. Further, as shown, the cylindrical portion 127 has openings 129a, 129b, 129c,
29d are formed. This serves as a vent hole in the degassing process described later. Below the vent 126, the vent 126
A cylindrical straw portion 130 having substantially the same diameter as the cylindrical portion 127 is provided.

The packaging bag 100 is held by the bag holding member 7 and sequentially moves through the steps indicated by numerals on the turntable 5 as the turntable 5 rotates. That is, the first
In the process, the packaging bag 100 with spout is supplied to the bag holding member 7 from a bag supply device (known and not shown).
In the present embodiment, bag packing is performed in units of two, and the bag holding member 7 has two notches, that is, bag holding portions 7a, and is simultaneously provided from the bag supply device. Two bags 100 are supplied.

In the second step, it is confirmed by the detector 9 using an optical sensor or the like that the packaging bag 100 is held by the bag holding member 7. In the third step, printing such as date of manufacture is performed by a printing machine 11 such as a jet printer. In the fourth step, a predetermined amount of liquid material is filled into the bag by using a liquid filling nozzle 13 connected to a storage tank (not shown). That is, the tip of the filling nozzle 13 is connected to the mouth 115 of the spout 103 of the bag 100.
To be in communication with each other and filled with a liquid material.

In this step, after the liquid is filled, air is introduced into the bag. That is, the liquid filling nozzle 13 used here is not only a liquid storage tank,
It is also connected to a compressed air source (not shown) with a predetermined pressure,
When the filling of the predetermined amount of liquid has been completed, the connection to the compressed air source is switched by the action of the switching valve.
Then, the compressed air is introduced into the bag 100 so that the bag 100 is almost completely expanded or expanded.

As described above, the packaging bag 100 has a certain degree of rigidity. Therefore, even if the liquid material is filled into the bag 100, the bag 100 is not completely expanded by itself. The liquid material moves downward in the bag 100, but the bag 100 does not completely spread even in the lower portion where the liquid is stored. Therefore, in this state, even if the amount of the liquid material in the bag 100 is the same, the liquid level in the bag 100 is higher than when the bag 100 is completely expanded. Then, when the lumps 100 are moved to the next step in this state, the liquid in the bag 100 may spill from the mouth of the spout 103 due to an impact at that time. Therefore, after filling the liquid, the bag 100 is set to a substantially inflated state to lower the internal liquid level, thereby preventing the liquid from spilling. Once inflated, the bag is hard to return to its original shape due to its rigidity, and maintains the inflated state.

In the next fifth step, the spout mouth cleaning device 1 is used.
Using 5, a cleaning liquid and air are sprayed to wash the portion of the spout 103 outside the bag body 101.
In the sixth step, air is blown onto the previously washed portion of the spout by the spout opening drying device 17 to dry the spout. The introduction of the air into the bag 100 does not necessarily have to be performed by switching the connection of the liquid filling nozzle, and a single step for introducing air may be provided after the liquid is filled, or the fifth step may be performed. May be performed prior to the cleaning in the cleaning step described above.

In the seventh step, the gas flush nozzle 19 is inserted into the spout 103, thereby replacing the air in the bag 100 with, for example, nitrogen gas. As described below, in the present invention, the inside of the bag 100 is deaerated in a later step in the present invention, but 100% complete deaeration may not always be expected. Therefore, a gas that may slightly remain in the bag 100 is not an air but an inert gas such as nitrogen, so as to eliminate the influence on the contents.

In an eighth step, a tape 22 composed of an aluminum foil, a synthetic resin thin film or the like is supplied from a tape supply device provided with a tape reel 21, a seal body for an inner seal is punched out, and a spout opening is formed. Temporarily attached to upper end face 117. This will be described later.

The ninth step is a primary sealing step of sealing the seal body to the spout mouth upper end face 117 using the hot plate 23. In this step, the inside of the bag 100 is evacuated prior to the sealing. These will be described later. First
Step 0 is a secondary sealing step similarly performed using the hot plate 25. The eleventh step is a cooling step, in which the sealed portion is cooled using the cooling plate 27.

The twelfth step is an inner seal failure detecting step for determining whether or not the inner seal has been properly performed. However, since it has nothing to do with the gist of the present invention, a detailed description thereof will be omitted. The thirteenth step is a cap mounting step, in which the cap 30 is supplied from the cap supply device 29 to the cap tightening device 31 and tightened and attached to the mouth of the spout. In the fourteenth step, strobe light 33, C
The tightening state of the cap is inspected by a cap tightening inspection device including the CD camera 35 and the like. Then, in a fifteenth step, it is discharged onto a discharge conveyor 37.

Next, the inner sealing step, which is a feature of the present embodiment, will be described with reference to FIG. That is, separately from the cap attached to the screw portion 111 of the spout 103, an inner seal body made of an aluminum foil or a thin film of a synthetic resin is welded to the upper end surface 117 of the mouth and attached to seal the mouth 115. It is a process. FIG.
Is a temporary sealing device 4 for punching the inner seal body in the eighth step and partially joining the inner seal body to the upper end face 117 of the spout opening 115 in the circumferential direction and temporarily attaching the inner seal body.
FIG. 2 is an elevation view showing the configuration of FIG.

The temporary sealing device 41 is fixed to the machine base 3 at a position corresponding to the position of the eighth step by using appropriate means.
It is located outside the turntable 5. This device 41
Is provided with a mounting block 43 which is mounted on the machine base 3 and to which each member described later is mounted. The block 43 includes a lower frame mounting portion 44, a vertical portion 45 erected on the lower frame mounting portion 44, and an arm portion 46 extending laterally from the upper end thereof.
Consists of The arm 46 and the machine mount 44
, Two lifting guide shafts 47 and 48 extend in parallel with each other and are supported.

A cutter cylinder 49 is mounted on the upper side near the tip of the arm 46. A cutter elevating holder 51 is attached to the tip of the rod 50 of the cylinder 49. The holder 51 includes an upper arm 52 attached to the rod 50, a vertical portion 53 hanging down from the tip thereof, and a lower arm 54 extending from the lower end in the same direction as the upper arm 52. Two slide bearings 55a and 55b that are slidably fitted to the elevating guide shafts 47 and 48, respectively, are fixed to the distal end side of the lower arm portion 54. A cutter 56 is attached to the lower surface of the lower arm 54 at a position close to the vertical portion 53.

As shown in FIG. 4, the cutter 56 has a flat mounting portion 57 mounted on the lower arm 54.
And a shank portion 58 extending downward therefrom, and a through hole 56 a is formed through the mounting portion 57 and the shank portion 58. As shown in FIG. 4B, the cross-sectional shape of the through-hole 56a is such that the rhombic corners are arcuate. The lower end of the shank portion 58 has a tapered inner peripheral side, and a cutting edge 59 is formed at the tip.

Referring again to FIG. 3, a temporary sealing hot plate cylinder 61 is mounted on the arm portion 46 of the mounting block 43 on the side opposite to the cutter cylinder 49 in a downward direction. At the tip of the rod 62, a hot plate mounting and lowering holder 63 is mounted, and slide bearings 64a and 64b mounted thereon are mounted on the raising and lowering guide shaft 4.
7 and 48 are slidably fitted respectively. A heater holding rod 65 extending substantially concentrically with the rod 62 and extending into the through hole 56a of the cutter 56 is attached to the lower surface side of the elevating holder 63, and a heater (not shown) is provided inside the heater holding rod 65. It is inserted, and its tip constitutes a hot plate 66 for temporary sealing (see FIG. 5). On the lower surface side of the hot plate 66, two projections 67a and 67b are formed at positions that are placed on the upper end surface 117 of the mouth portion 115 of the spout 103 and that are diametrically opposed to each other.

On the other hand, in this step, the packaging bag 100 held by the bag holding member 7 is
Are positioned below the cutter 56 or the heating plate 66 so as to be concentric with the cutter 56 or the heating plate 66. As described with reference to FIG. 1, in this step, the tape 22 made of aluminum foil is supplied from the tape reel 21 and extends in the direction of the arrow in FIG. 3, and the mouth 115 of the spout 103 of the packaging bag 100 and the cutter 5
6. It passes between the hot plate 66. When the cylinders 49 and 61 are appropriately controlled and moved in this state, the hot plate 66 first presses down the corresponding portion of the tape 22 and presses the tape 22 onto the upper end surface 117 of the spout 103 to fuse it. At this time, as described above, the protrusions 67a, 6
7b, the inner seal body 68 is not welded over the entire circumference of the mouth 115, but as shown in FIG. 5 (b), two partial welds 69a,
At 69b, it is partially welded and tacked. Next, the inner seal body 68 corresponding to the cross-sectional shape of the cutting blade 59 is punched out of the tape 22 by the cutter 56. The size of the inner seal body 68 is sufficiently larger than the cross section of the mouth 115 of the spout 103. The welding and the punching of the seal body 68 do not necessarily have to be performed in the order described above. Punching and welding may be reversed or may be performed almost simultaneously. In short, the inner seal body 6 having a predetermined size
8 may be placed on the spout mouth upper end surface 117 and partially welded as described above.

FIG. 6 is an elevational view of an apparatus 71 used in the next ninth step of deaeration and primary sealing. Reference numeral 72
Reference numeral denotes an elevating shaft support stand erected on the machine base 3, one end of which is vertically movably inserted into a center hole 72a of the elevating shaft support stand. At the upper end of the elevating shaft 73 protruding from the stand 72, a sealing device mounting arm 74 is provided.
Is attached to the free end of the arm 74.
A hot plate mounting holder 75 having a hot plate 76 mounted at the lower end is vertically movably mounted. The heating plate 76 is provided with a heater 77 connected to a power supply (not shown) to heat the heating plate, and a thermocouple 78 connected to an appropriate control circuit is also provided to turn the heater 77 on and off. Then, the temperature of the hot plate 76 is controlled.
Reference numeral 79 denotes a compression spring disposed between the hot plate 76 and the seal device mounting arm 74. In this step, the packaging bag 100 is supported by the bag holding member 7 with the inner seal body 68 temporarily attached to the upper end surface of the mouth 115,
It is located below the hot plate 76. On the other hand, a deaerator 80 is also provided in this step, and a pair of press plates indicated by reference numerals 81a and 81b and arranged so as to sandwich the
In the figure, it moves left and right.

That is, in this step, first, as shown in the figure, the press plates 81a and 81b separated from the bag 100 move in the direction approaching each other, and press the packaging bag 100 by a predetermined width. As described above, in the fourth or fifth step, air is introduced into the bag 100 in such an amount that the bag 100 is almost completely expanded, and in the eighth step, the inner seal member 6 is opened.
8 is partially provisionally attached to the upper end surface of the mouth 115 of the spout 103. Therefore, when the bag 100 is pressed from both sides by the press plates 81a and 81b, the air existing at the upper part in the bag 100 is changed to the spout 10 described in FIG.
The air is discharged from the mouth 115 through the vent hole 129 of the third ventilation part 126. Further, the liquid enters the spout 103, and the air existing therein is substantially discharged. Press plate 8
The pressing amounts of 1a and 81b are determined in advance so that the air in the bag 100 can be almost completely evacuated and the liquid inside does not overflow from the mouth. After degassing in this manner, the hot plate 76
Is lowered, and the inner seal body 68 is pressed against the upper end face 117 of the mouth 115, and is welded over the entire circumference of the mouth 115.
In this way, the mouth can be sealed in a state where the air in the bag 100 is almost completely evacuated. As described above, air is introduced into the bag 100 in the fourth or fifth step to expand the bag 100 almost completely and lower the internal liquid level. Is not spilled from the mouth and becomes dirty, and the temporary sealing and the primary sealing of the inner seal body 68 in the eighth and ninth steps are performed well. Then, a secondary seal is applied in the tenth step, the inner seal becomes more complete, and the bag 100 moves to the subsequent steps as described above.

FIG. 7 shows the press plates 81a and 81 shown in FIG.
Alternative deaerator 83 instead of deaerator 80 using 1b
FIG. In the deaerator 83, the bag 100
Instead of pressing it from both sides, its bottom 10
0a is lifted. That is, the elevating shaft 86 is attached to the tip of the rod 85 of the cylinder 84 fixed to the machine base 3.
The elevating shaft 86 extends upward through a through hole 87a of an elevating shaft support stand 87 erected on the base 3, and a receiving base 88 is attached to an upper end thereof. By operating the cylinder 84, the receiving table 88 is moved upward, and the bottom 100a of the packaging bag 100 is supported from below and lifted upward by a predetermined distance. By performing this operation, the air in the bag 100 can be deaerated.

FIG. 8 is an elevational view of an apparatus 91 used in a deaeration and cap mounting step according to another embodiment. In this embodiment, the inner seal performed in the first embodiment is not performed, and only the cap 30 is attached to the mouth 115 of the spout 103. That is, the eighth to twelfth steps of FIG. 1 are not performed, and the first step is performed after the seventh step.
In this thirteenth step, the cap 3
Degassing is performed prior to installation of zero.

This deaeration and cap attaching device 91
Is provided with an elevating shaft 93 movably supported by an elevating shaft support stand 92 erected on the machine base 3, and a capper mounting arm 94 is attached to the upper end thereof. A capper 95 is provided at a free end of the arm 94. The capper 95 has a motor 96, and a cap chuck 97 is attached to the tip of the output shaft so as to be integrally rotatable. The cap chuck 97 grasps the caps 30 supplied one by one from the cap supply device 29 shown in FIG. 1, moves downward, is rotated by the motor 96, and is attached to the mouth 115 of the spout 103. Prior to that, the press plates 81a and 81b, which may be the same as those shown in FIG. 6, are moved by a predetermined distance by the cylinders 82a and 82b, and as in the first embodiment, Degassing is performed. Also in this case, after the liquid is filled, in the same fourth step as the liquid filling, or in the fifth washing step, air is introduced into the bag to completely open the bag so that the inside liquid level is lowered and the subsequent bag is filled. , The liquid in the bag 100 does not spill in subsequent steps. Therefore, the cap 30 is attached while the mouth 115 is dirty, and there is no problem in hygiene. In addition, the inside of the bag 100 can be stably deaerated, and there is no problem such as deterioration of the contents. At this time, even if some gas remains, no problem occurs because the air in the bag is replaced with nitrogen gas or the like in the seventh step.

FIG. 9 is an elevational view showing a configuration in which a female cutter 56a having a shape corresponding to the male cutter 56 shown in FIG. 4 is used when the inner seal body 68 is punched. . Although not shown, the female cutter 56a is formed with a through-hole having a female cutting blade whose upper end has a female cutting blade whose shape is determined so as to have an appropriate clearance with the cutting blade 59 of the male cutter 56. Have been. In this embodiment, punching of the inner seal body 68 is performed first, and then partial sealing is performed. The mounting block 43
The machine mounting portion 44 has a passage 4 for the tape 22.
4a are formed.

[0036]

As is apparent from the above description, according to the present invention, when a liquid material is packed and packaged using a packaging bag with a spout, the air in the bag can be almost completely deaerated. Deterioration of the contents due to air after packaging can be prevented.

Further, air is introduced into the bag after filling to bring the bag into a substantially completely expanded state, thereby lowering the liquid level in the bag and preventing the liquid from spilling when moving to the subsequent steps. And good sealing can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire configuration of a liquid material filling device according to a first embodiment of the present invention.

FIG. 2 is a view showing a bag holding member for a packaging bag with a spout;
(A) is a front view of the bag, (B) is a partial front view of the spout,
(C) is a partial plan view of the bag holding member.

FIG. 3 is a front view showing a configuration of an inner seal temporary attaching device.

FIG. 4 is a view showing a cutter, (a) is a front view, (b)
Is a bottom view.

FIG. 5 is a view showing temporary attachment of the inner seal body to a spout opening, and FIG. 5A is a view showing a relationship among a cutter, a hot plate, a spout opening, and an inner seal body. (B) is a view showing a state of partial welding.

FIG. 6 is a front view showing the structure of the deaeration and sealing device.

FIG. 7 is a front view showing a configuration of a deaerator according to another embodiment.

FIG. 8 is a front view showing a configuration of a deaeration and cap mounting apparatus according to still another embodiment.

FIG. 9 is an elevation view showing another embodiment of the inner seal body punching device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bag-packing and packaging device 5 rotating table 7 bag holding member 13 liquid filling nozzle 15 spout mouth cleaning device 19 gas flush nozzle 22 tape 23, 25 hot plate 29 cap supply device 41 temporary sealing device 47, 48 slide guide shaft 49 cutter Cylinder for cutter 51 Holder for raising and lowering cutter 55 Slide bearing 56 Cutter 59 Cutting blade 61 Cylinder for temporary sealing 63 Heating plate mounting and lowering holder 64 Lifting and lowering slide bearing 65 Heater holding rod 66 Heat plate 67 Projection 68 Inner seal body 69 Partial welding part

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[Procedure amendment]

[Submission date] May 29, 2000 (2005.2
9)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (8)

[Claims] 1. A method for packing and packing a liquid material in a packaging bag using a packaging bag with a spout, wherein a filling step of filling the liquid material into the bag through a mouth portion of the spout; A sealing step of sealing the mouth of the spout, wherein the sealing step includes a sealing step of sealing the mouth of the spout, and a degassing step of degassing the inside of the packaging bag before the sealing step. A bag-filling and packaging method comprising: 2. The bag-filling packaging method according to claim 1, wherein said packaging method further comprises an air blowing step of blowing air into said packaging bag after said filling step and before said sealing step. A bag-filling method. 3. The bag-filling packaging method according to claim 2, wherein said packaging method further comprises a washing step of washing a spout mouth, wherein said air blowing step is a step in or before said washing step. A bagging and packaging method, which is performed in 4. The bag packing method according to claim 1, wherein the sealing step includes an inner sealing step of sealing a mouth of the spout with a thin film inner sealing body. The inner sealing step includes a temporary attaching step of partially bonding the inner seal body to the mouth of the spout, the degassing step, and bonding the inner seal body over the entire periphery of the mouth of the spout. And a main sealing step. 5. The bag packing method according to claim 4, wherein the inner seal body is formed by punching out a tape-shaped material, and the punching is performed in the temporary attaching step. Packing and packaging method. 6. An inner seal for sealing a mouth portion of the spout with a thin film inner seal body, which is used in a bag packing method of packing a liquid material in the packaging bag by using the packaging bag with the spout. In the sealing device, the inner sealing device is provided with a temporary sealing device that partially joins and temporarily attaches the inner seal body in a circumferential direction of the mouth portion. 7. The inner seal device according to claim 6, wherein the inner seal device is disposed around a rotary table provided with a bag holding device that holds the packaging bag, and the inner seal device further includes the inner seal. After the partial joining of the seal member, a degassing device for deaerating the air in the packaging bag, and a full-peripheral sealing device for joining the inner seal member over the entire periphery of the mouth of the spout, The inner sealing device, wherein the degassing device and the entire-peripheral sealing device are arranged at the same position in a circumferential direction of the rotary table. 8. The inner sealing device according to claim 6, wherein the temporary sealing device includes a heat conducting member connected to a heat source, and a surface of the heat conducting member facing the opening. An inner seal device, further comprising a projection which comes into contact with the upper surface of the mouth portion.