JP6494390B2 - Sealing device and sealing method - Google Patents

Description

  The present invention relates to a bag sealing device and a sealing method.

  Patent Document 1 discloses a method of automatically sealing an envelope by conveying it with a conveyor and passing it through an inclined guide plate.

JP-A-6-297897

In the sealing method disclosed in Patent Document 1, when the fold when folding is positioned closer to the accommodating part than the flap part, the sheet material on the front surface of the bag and the sheet material on the back surface are overlapped Fold at. In particular, in the case of an envelope made of a plastic sheet, since it is difficult to bend, wrinkles are likely to occur near the fold when folded. When wrinkles occur, the adhesive strength of the flap portion due to the adhesive is weakened. As a result, problems such as leakage of contents, deterioration of sealing performance, and deterioration of appearance occur.
An object of the present invention is to provide a sealing device and a sealing method capable of automatically sealing while suppressing generation of wrinkles.

The sealing device of the present invention includes a fixing mechanism that fixes a bag in which contents are accommodated and not sealed, a chuck mechanism that can grip an opening of the bag, and a moving mechanism that moves the chuck mechanism. Have. The moving mechanism moves the chuck mechanism toward a side in which the contents are accommodated in a state where the chuck mechanism grips the opening . The chuck mechanism includes a pair of rollers, and the pair of rollers sandwiches the opening, thereby gripping the opening. The pair of rollers includes a small-diameter roller and a large-diameter roller. The large-diameter roller is located in front of the moving direction in the thickness direction of the bag of the mechanism, and is located behind the moving direction in the thickness direction of the bag of the chuck mechanism .

  According to the present invention, since the opening can be easily folded while suppressing generation of wrinkles, the reliability of sealing is increased. Thereby, it is possible to suppress leakage of contents, deterioration of sealing property, and deterioration of appearance.

It is a top view which shows the sealing bag which is an example of the bag sealed by this invention. It is sectional drawing which shows the principal part of the sealing apparatus of the 1st Embodiment of this invention. It is a perspective view which shows the sealing apparatus shown in FIG. It is sectional drawing which expands and shows the chuck mechanism of the sealing apparatus shown in FIG. It is sectional drawing which shows the sealing method by the sealing apparatus shown in FIG. 2 in order of a process. It is a flowchart of the sealing method shown in FIG. It is sectional drawing which shows the sealing method by the sealing apparatus of the 2nd Embodiment of this invention in order of a process. It is sectional drawing which shows the principal part of the sealing apparatus of the 2nd Embodiment of this invention. It is a perspective view which shows the sealing apparatus shown in FIG. It is sectional drawing which shows the cross section orthogonal to FIG. 8 of the sealing apparatus shown in FIG. It is sectional drawing which shows the principal part of the modification of the sealing apparatus shown in FIG. It is sectional drawing which shows the sealing method by the sealing apparatus shown in FIG. 8 in order of a process. It is a flowchart of the sealing method shown in FIG.

  An automatic sealing device according to an embodiment of the present invention will be described. FIG. 1 is a plan view showing a sealing bag sealed by an automatic sealing device. The sealing bag 1 is a package bag that is formed of a sheet material made of a transparent, translucent, or opaque plastic film and that contains an envelope and various contents. The sealing bag 1 has a rectangular bag shape in which one side is open and the other three sides are sealed, and includes a housing portion 9 that is a main body portion of the bag, an opening portion 8, and a front side (thickness of contents). A flap portion 11 that is a part of the sheet material on the lower side in the direction and is provided to extend outward from the opening. Further, the adhesive layer 3 is provided at a position of the sheet material on the back side (upper side in the thickness direction of the contents) facing the flap portion 11 at the time of sealing. In this specification, for the sake of convenience, the portion outside the adhesive layer 3 of the sealing bag 1 (the side on which the flap portion 11 extends) is referred to as an opening (opening 8), and the other portion is referred to as a receiving portion (accommodating). Part 9).

After the contents 2 are accommodated in the sealing bag 1, the opening 8 is folded and the flap portion 11 is superimposed on the adhesive layer 3, and the flap portion 11 is fixed by the adhesive layer 3. Part 8 is sealed. In this example, in order to prevent moisture from entering inside the sealing bag 1, the front side, that is, the sheet material on the side where the flap portion 11 is provided, and the back side, ie, the sheet on the side where the adhesive layer 3 is provided. It is folded at the position where the two materials overlap. The opening part 8 of the sealing bag 1 sealed in each following embodiment is not restricted to what opens in a horizontal direction, as shown in FIG. 2, You may open in another direction.
The sealing bag 1 is not limited to plastic, and may be bags made of various materials such as paper and cloth. In addition, the contents 2 include, for example, a bundle of sheets such as print paper, but the present invention is not limited thereto, and any article having a size that fits in a bag is a target.

(First embodiment)
A sealing device according to a first embodiment of the present invention for sealing a bag such as the plastic sealing bag 1 shown in FIG. 1 is shown in FIGS. The sealing device shown in FIGS. 2 and 3 mainly includes fixing tools 4a and 4b, which are fixing mechanisms that fix the accommodating portion 9 of the sealing bag 1 that accommodates the contents 2, and that can be separated from each other. The chuck mechanism 7 is capable of gripping (chucking) the portion 8. Specifically, the accommodation portion 9 that accommodates the contents 2 is placed on the top surface of the fixture 4 b, and the accommodation portion 9 is fixed by pressing the fixture 4 a against the accommodation portion 9 from above. An adhesive layer 3 for sealing is formed in advance on the sealing bag 1, and the fixture 4 a comes into contact with the accommodating portion 9 at a position where it does not contact the adhesive layer 3.

  The chuck mechanism 7 includes a large-diameter roller (large roller) 5 and a small-diameter roller (small roller) 6. The chuck mechanism 7 has an opening / closing operation for sandwiching and holding (chucking) the sealing bag 1, and the chucked sealing bag 1. It can be translated for folding. In the present embodiment, the opening and closing operation of the chuck mechanism 7 is performed by causing the large roller 5 and the small roller 6 to approach or separate from each other by the cylinder 14 shown in FIG. Further, the chuck mechanism 7 is moved up and down by the cylinder 12 and the chuck mechanism 7 is moved horizontally by the cylinder 13. The moving mechanism 15 including these cylinders 12 to 14 is controlled by a control device 16 (a controller including a computer). Note that the moving mechanism 15 of the chuck mechanism 7 is not limited to driving means using a cylinder (fluid cylinder or electric cylinder), but may be driving means using a motor and a gear train.

  As shown in FIG. 4, the large roller 5 and the small roller 6 are arranged so that the common tangent of both rollers is oblique to the opening direction of the sealing bag 1. The inclination angle θ is 20 to 70 °, and 45 ° in the illustrated example. Since the chuck mechanism 7 of the present embodiment is composed of the large roller 5 and the small roller 6, there is an advantage that the structure is simple and the sealing bag 1 is easy to slide and fold when the chuck mechanism 7 moves horizontally. However, the chuck mechanism 7 is not limited to the one composed of the rollers 5 and 6.

The sealing operation sequence by the sealing device described above will be described in detail with reference to FIGS. FIG. 5 is a schematic diagram sequentially showing the sealing process of the sealing device of the sealing bag 1 of the present embodiment, and FIG. 6 is a flowchart of the sealing process. These sequences are executed under the control of the control device 16.
First, as a fixing process, as shown in FIG. 5A, the container 9 of the plastic sealing bag 1 containing the contents 2 is sandwiched and fixed by the fixing tool 4a and the fixing tool 4b ( Step S1). Next, as a chucking process, the cylinder 14 is operated to bring the large roller 5 and the small roller 6 of the chuck mechanism 7 close to each other, and the opening 8 is sandwiched and chucked as shown in FIG. 5B (step S2). . In this embodiment, the chucking force by the chuck mechanism 7 is set to 0.5N. If the chucking force is too strong, the rollers 5 and 6 are difficult to slide in the subsequent positioning step, and therefore it is necessary to set the size appropriately. In this way, the opening 8 of the sealing bag 1 is chucked by the chuck mechanism 7.

  Next, a positioning process is performed. The cylinder 13 is operated to horizontally translate the chuck mechanism 7 to the position where the fold of the sealing bag 1 is formed as shown in FIG. That is, the rollers 8 and 6 chucking the opening 8 are horizontally translated from the opening side toward the container side, thereby squeezing the opening 8 to the edge of the stored contents 2 (step S3). . In this way, the fold is positioned. In this way, by squeezing the opening 8 to the edge of the stored contents 2, the slack generated between the sealing bag 1 and the contents 2 can be extended, and the generation of wrinkles can be suppressed. In particular, the large roller 5 and the small roller 6 are in a positional relationship in which the common tangent is inclined with respect to the opening direction, so that the pulling force by both rollers acts toward the crease and can be folded while suppressing generation of wrinkles. it can.

  Next, a bending process is performed. When the cylinder 12 is actuated, the rollers 5 and 6 of the chuck mechanism 7 are positioned above the sealing bag 1 as viewed in the thickness direction (the vertical direction along the gravity in this apparatus) as shown in FIG. The opening 8 including the flap 11 is bent 90 degrees (step S4). Then, the chucking force of the chuck mechanism 7 that chucks the opening 8 is increased (step S5). For example, in this embodiment, the chucking force is increased from 0.5N to 10N. By strengthening the chucking force in this way, it is possible to prevent the force that pulls the opening 8 from being weak and the sagging bag 1 from sagging and easily causing wrinkles. In the present embodiment, the small roller 6 is positioned in front of the sealing bag 1 in the moving direction in the thickness direction (upward in FIG. 5), and the large roller 5 is positioned in the rear in the moving direction (lower in FIG. 5). ing. As a result, the opening 8 can be bent sharply while applying a firm crease with the small roller as a fulcrum.

  Next, a sealing process is performed. As described above, the cylinders 13 are operated in a state where the rollers 5 and 6 are raised and located at a position higher than the upper surface of the accommodating portion 9. As a result, as shown in FIG. 5 (e), the chuck mechanism 7 that chucks the opening 8 and is positioned above the sealing bag 1 is arranged horizontally from the opening side of the sealing bag 1 toward the housing portion. The translation is performed (step S6). Along with this parallel movement, the opening 8 and the flap portion 11 are placed on the lower side of the lower roller (large roller 5) so as to be directly in contact with the adhesive layer 3 and pressed by the large roller 5. It is done. Thereby, the opening 8 and the flap part 11 are adhered to the housing part 9 by the adhesive layer 3. As the parallel movement of the rollers 5 and 6 proceeds, the opening 8 and the flap portion 11 come out from between the rollers 5 and 6 while rotating the rollers 5 and 6, and are firmly attached to the accommodating portion 9. Sealing is thus completed.

  In the present embodiment, in the positioning step, the opening 8 is chucked by the rollers 5 and 6 of the chuck mechanism 7 and squeezed to the edge of the stored contents 2, so that slack is eliminated and generation of wrinkles can be suppressed. it can. In addition, when the opening 8 is folded, the opening 8 and the flap 11 are positioned on the lower side of the large roller 5, so that they are pressed by the large roller 5 and overlapped so as to be in direct contact with the adhesive layer 3. And it is firmly bonded. Thus, a highly reliable seal is realized.

  In the present embodiment, the adhesive layer 3 is formed on one surface (upper surface) in the thickness direction of the sealing bag 1, and sealing is performed after the opening 8 is folded to one side (upward) in the folding step. . However, it is also possible to form the adhesive layer 3 on the other surface (lower surface) in the thickness direction of the sealing bag 1 and perform sealing after the opening 8 is folded to the other side (downward) in the folding process. it can. In that case, the positional relationship between the large roller 5 and the small roller 6 is reversed, the large roller 5 is disposed on one side (upper side) in the thickness direction of the sealing bag 1, and the small roller is disposed on the other side (lower side). 6 is preferable because a firm crease can be made.

(Second Embodiment)
FIG. 7 is a schematic view showing a second embodiment of the present invention. A sealing method according to the second embodiment will be described with reference to FIG. The sealing device according to the present embodiment includes fixtures 4a and 4b for fixing the accommodating portion 9 that accommodates the contents 2, a chuck mechanism 7 that chucks the opening 8 for sealing, an adhesive application mechanism 10, and the like. Consists of. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
In the sealing method of this embodiment, first, as shown to Fig.7 (a), the accommodating part 9 of the sealing bag 1 which accommodates the content 2 is fixed with the fixing tools 4a and 4b (fixing process). At the same time, the rollers 5 and 6 of the chuck mechanism 7 sandwich and chuck the portion of the housing portion 9 closer to the opening portion 8 than the portion in contact with the fixtures 4a and 4b (chucking process). That is, the fixtures 4a and 4b and the rollers 5 and 6 are in a state of sandwiching the accommodating portion 9 therebetween. The chucking force by the rollers 5 and 6 at this time is set to 5N. If the chucking force is too strong, the rollers 5 and 6 are difficult to slide in the next positioning step. If the chucking force is too weak, the sag of the sealing bag 1 cannot be sufficiently extended in the next positioning step. Therefore, it is necessary to set an appropriate chucking force.

  Next, as shown in FIG. 7B, the chuck mechanism 7 is horizontally translated toward the opening 8 side to reach a position where a crease is formed. This parallel movement is a movement in which the rollers 5 and 6 sandwiching the housing portion move from the housing portion 9 side toward the opening portion 8 side. That is, in the present embodiment, the chuck mechanism 7 squeezes the sealing bag 1 from the housing portion 9 side toward the opening portion 8 side rather than from the opening portion 8 side toward the housing portion 9 side. This is possible because the adhesive layer is not formed at this point. In this way, the rollers 5 and 6 that have chucked the housing portion 9 are horizontally translated, and the sealing bag 1 is squeezed to the edge of the contents 2. By squeezing to the edge of the contents 2, the slack generated between the sheet material constituting the sealing bag 1 and the contents 2 can be extended, and the generation of wrinkles can be prevented. At this time, in particular, the large roller 5 and the small roller 6 are in a positional relationship in which the common tangent is inclined with respect to the opening direction. Can be folded.

  Next, an adhesive is applied. As shown in FIG. 7C, after the chuck mechanism 7 is horizontally translated to the edge of the contents 2, an adhesive is applied to the housing portion 9 by the adhesive application mechanism 10 to form an adhesive layer. (Adhesive application process). In the present embodiment, since a sheet-like adhesive is used, handling is easy, and adhesion of the adhesive to other than the sealing portion can be prevented. However, the adhesive layer is not limited to an adhesive layer made of a sheet-like adhesive, and various forms of adhesive can be used.

  Thereafter, as in the first embodiment, as shown in FIG. 7D, the rollers 5 and 6 of the chuck mechanism 7 are raised above the sealing bag 1 as seen in the thickness direction, and the flap portion 11 is included. The opening 8 is bent 90 degrees (bending step). Further, the rollers 5 and 6 are horizontally translated from the opening 8 side of the sealing bag 1 toward the housing portion 9 in a state where the rollers 5 and 6 are at a position higher than the upper surface of the housing portion 9. At this time, the opening portion 8 and the flap portion 11 are pressed against the housing portion 9 by the large roller 5 and adhered to the housing portion 9 by the adhesive layer 3 (sealing process).

(Third embodiment)
In the sealing device of the third embodiment of the present invention, particularly when the thick contents 2 are accommodated, the position of the folds is not stabilized at the time of folding due to the looseness caused by the gusset of the sealing bag 1 and around the contents 2. This structure prevents play from occurring (deteriorating tightness). According to the present embodiment, the tightness deteriorates, and the content 2 moves in the sealing bag 1 due to vibration during transportation or the like, and the friction between the sheet material constituting the sealing bag 1 and the friction between the contents 2. This prevents the content 2 from being scratched. Therefore, it is possible to prevent the occurrence of quality problems due to the sealing in the sealing bag 1.

  As shown in FIGS. 8 and 9, the sealing device of the present embodiment includes fixtures 4 a and 4 b that fix the sealing bag 1, a chuck mechanism 7 that chucks the opening 8 for sealing, and a folding mechanism. 23 and a gusset presser mechanism 25. The fixtures 4a and 4b have substantially the same configuration as the fixtures 4a and 4b of the first embodiment, and the accommodating portion 9 of the sealing bag 1 is placed on the top surface of the fixture 4b, and the fixture 4a is accommodated in the accommodating portion. 9 is pressed from above and pressed against the fixture 4b to fix it. The fixing tool 4a is disposed at a position avoiding the sealing adhesive layer 3 formed in the sealing bag 1 in advance. The fixture 4b is located in a range including the portion immediately below the end of the contents 2 in the opening 8 and supports this end, and interferes with each roller during positioning by the two rollers 5 and 6 of the chuck mechanism 7. It is a dimension that does not. Specifically, the planar shape of the fixture 4 b of the present embodiment is the same size as the planar shape of the contents 2. Thereby, particularly when the content 2 is a bundle of thick print sheets, the end of the content 2 hangs down by its own weight in the opening 8 and the adhesive force by the adhesive layer 3 is insufficient at the time of sealing. Can be prevented. Since the configuration of the chuck mechanism 7 is the same as that of the first embodiment, description thereof is omitted.

  The folding mechanism 23 includes a presser 21 and a shutter 22. The presser 21 is disposed at a position avoiding the adhesive layer 3 and presses the end (tip) of the content 2 on the opening side. Thereby, the presser 21 suppresses the end of the contents 2 from being lifted together when the chuck mechanism 7 is raised in the bending process to bend the opening 8. The shutter 22 attached to the presser 21 is located at a position that becomes a fold of the sealing bag 1 and closer to the opening 8 than the end of the content 2, and the shutter 21 is moved from the presser 21 to the sealing bag 1. Protrusively. When the folding mechanism 23 is lowered and the presser 21 comes into contact with the end of the contents 2 in the opening 8, the shutter 22 moves integrally with the presser 21, and the fold of the sealing bag 1 is moved. Press firmly against the position to be formed. In the present embodiment, the cylinder 29 is provided as a driving unit that causes the folding / retaining mechanism 23 to move up and down. However, the driving means of the folding mechanism 23 is not limited to the cylinder, and may be other means such as a driving means using a motor and a gear. The shutter 22 of the present embodiment is a metal plate having a thickness of 1 mm, but the material and thickness are not limited to this, and the material of the sheet material constituting the sealing bag 1 and the ease of attaching creases are taken into consideration. You may change suitably.

The gusset presser mechanism 25 includes a pair of gusset pressers 24 provided to face both side surfaces of the sealing bag 1. As shown in FIG. 10, the gusset presser 24 moves in the direction of the arrow 26, abuts against the side surface of the accommodating portion 9 in which the content 2 is inserted, and presses the gusset portion 27. Thereby, the looseness of the side part of the sealing bag 1 is suppressed. In particular, the gusset presser 24 is preferably arranged at a position that is biased toward the opening 8 side with respect to the center of the contents 2 accommodated in the accommodating portion 9. This is to effectively prevent wrinkles that are likely to occur in the vicinity of the crease position of the opening 8. The gusset presser 24 of the present embodiment has a circular surface that contacts the gusset portion 27 and is made of rubber. However, the gusset presser 24 is not limited to such a shape and material, but may be a gusset presser 28 having a rectangular surface that contacts the gusset portion 27 as in the modification shown in FIG. In that case, the gusset portion 27 can be pressed to prevent the sealing bag 1 from being loose, and the position of the contents 2 can be corrected.
In this embodiment, the cylinder 30 is provided as a driving means for moving the gusset presser 24 back and forth. However, the driving means for the gusset presser 24 is not limited to the cylinder, and a driving means using a motor and a gear. Other means may be used. The cylinders 29 and 30 are controlled by the control device 16.

  The folding mechanism 23 and the gusset pressing mechanism 25 can also be employed in the first embodiment and the second embodiment.

The sealing method of the present embodiment using the sealing device described above will be described with reference to FIG. 12 which is a schematic diagram showing the respective steps in order and FIG. 13 which is a flowchart thereof.
In the present embodiment, first, as shown in FIG. 12A, the sealing bag 1 containing the contents 2 is fixed by the fixing tools 4a and 4b (fixing step, step S11). Then, as shown in FIG. 12B, the gusset portions 27 on both side surfaces of the sealing bag 1 are pressed by the gusset pressing tool 24 of the gusset pressing mechanism 25 (gusset pressing step, step S12). In this way, the sealing bag 1 including the gusset portion 27 is fixed.

  Next, as shown in FIG. 12C, the opening 8 of the sealing bag 1 is sandwiched and chucked by the large roller 5 and the small roller 6 of the chuck mechanism 7 (chuck process, step S13). In this embodiment, the chucking force is set low (0.5 N) so that the rollers 5 and 6 do not slide easily in the positioning step.

  Next, the position of the fold of the sealing bag 1 is determined (positioning step). Specifically, as shown in FIG. 12 (d), the chuck mechanism 7 is horizontally translated from the opening 8 side toward the accommodating portion 9 side to the position at which the fold of the sealing bag 1 is formed. Positioning is performed (step S14). The rollers 5 and 6 that chuck the opening 8 are moved in parallel to squeeze the sealing bag 1 toward the edge of the content 2, thereby extending the slack generated between the sealing bag 1 and the content 2. Can be prevented. In particular, since the large roller 5 and the small roller 6 are in a positional relationship in which the common tangent is oblique to the opening direction, the force acts in the crease direction and can be folded while suppressing generation of wrinkles. It should be noted that the stop positions of the rollers 5 and 6 are set to positions where they do not interfere with the shutter 22 when the shutter 22 is lowered in the next folding process.

  Next, a crease is attached prior to folding the sealing bag 1 (folding step). Specifically, as shown in FIG. 12 (e), the folding mechanism 23 is lowered to bring the presser 21 into contact with the sealing bag 1 and press the end of the contents 2. At the same time, the tip of the shutter 22 is brought into contact with a position between the fixing portion of the sealing bag 1 by the fixtures 4a and 4b and the gripping position by the chuck mechanism 7 to crease the crease (step S15). Since the shutter 22 is attached to the presser 21, it is possible to simultaneously prevent the end of the contents 2 from being lifted and fold the sealing bag 1 in one operation.

  Next, the sealing bag 1 is folded (folding process). Specifically, as shown in FIG. 12 (f), the chuck mechanism 7 that has moved to the position of the crease is raised and the opening 8 is bent (step S16). Next, the chucking force of the chuck mechanism 7 that chucks the opening 8 is increased (step S17). In this embodiment, the chucking force is increased from 0.5N to 10N. This is because if the chucking force in the bending process is too weak, the force pulling the opening 8 is weakened, the sagging bag 1 is slackened, and wrinkles are likely to occur.

  Next, the state where the sealing bag 1 is creased is released (folding release process). That is, as shown in FIG. 12 (g), the folding / fitting mechanism 23 is raised, the tip of the shutter 22 is moved away from the sealing bag 1, and the folding / fitting state is released (step S18). Since the chucking force of the chuck mechanism 7 is strengthened in the folding process, the folded bag of the sealing bag 1 remains held even when it is separated from the shutter 22.

  Next, the opening 8 of the sealing bag 1 is sealed (sealing step). That is, as shown in FIG. 12 (h), the chuck mechanism 7 is horizontally translated from the opening 8 side toward the housing 9 side while the opening 8 bent upward is chucked. At that time, since the chucked opening 8 is located below the lower roller (large roller 5), it is pressed by the large roller 5 while in direct contact with the sealing bag. By this parallel movement, the chucked opening 8 is brought into contact with and bonded to the adhesive layer 3 (step S19). Eventually, the opening portion 8 and the flap portion 11 slide down from the chuck mechanism 7, are brought into close contact with the sealing bag 1, and the opening portion 8 is sealed.

  As described above, according to the present embodiment, even when the content 2 is thick, the gusset holding mechanism 25 suppresses the bumping at the gusset portion 27 on the side surface of the sealing bag 1 and folds the contents. The position of the fold of the sealing bag 1 can be stabilized by the mechanism. Thereby, the sealing bag 1 can be sealed without play (with high tightness), and damage to the contents 2 can be prevented. In the present embodiment, similarly to the second embodiment, the adhesive layer 3 may be formed immediately before the sealing step by the adhesive application mechanism 10 without forming the adhesive layer 3 in advance. In that case, even if the operation of squeezing the sealing bag 1 is a parallel movement of the chuck mechanism 7 that chucks the opening portion 8 in the direction from the opening portion 8 side toward the housing portion 9 side, the opening portion 8 from the housing portion 9 side. It may be a parallel movement in the direction toward the side.

  As described above, according to the present invention, when a bag such as the sealed bag 1 in which the content 2 is stored is sealed, the occurrence of wrinkles is suppressed, and the leakage of the content, the deterioration of the sealing property, and the appearance are reduced. It is possible to suppress the occurrence of problems such as lowering. In particular, when the content 2 is an article that is sensitive to moisture such as a bundle of print sheets, the moisture can enter the inside of the housing portion 9, which is effective.

1 Sealing bag (bag)
2 Contents 3 Adhesive layer 4a, 4b Fixing tool (fixing mechanism)
5 Large diameter roller (large roller)
6 Small diameter roller (small roller)
7 Chuck mechanism 8 Opening portion 9 Receiving portion 10 Adhesive application mechanism 11 Flap portion 12 Cylinder 13 Cylinder 14 Cylinder 15 Moving mechanism 16 Control device 21 Presser 22 Shutter 23 Folding mechanism 24, 28 Machi presser

Claims (14)

A fixing mechanism for fixing the bag in which the contents are contained and not sealed;
A chuck mechanism capable of gripping the opening of the bag;
A moving mechanism for moving the chuck mechanism;
Have
The moving mechanism moves the chuck mechanism toward a side where the contents are accommodated in a state where the chuck mechanism grips the opening .
The chuck mechanism includes a pair of rollers, and the pair of rollers grips the opening by sandwiching the opening,
The pair of rollers includes a small-diameter roller and a large-diameter roller, and the small-diameter roller is positioned forward in the moving direction of the chuck mechanism in the thickness direction of the bag, and the large-diameter roller is A sealing device, wherein the chuck mechanism is located rearward in the moving direction in the thickness direction of the bag . 2. The sealing device according to claim 1, wherein the chuck mechanism grips a portion of the opening where the sheet material on the front side of the bag and the sheet material on the back side of the bag overlap each other. The moving mechanism moves the chuck mechanism in the thickness direction of the bag while keeping the chuck mechanism holding the opening, and then moves the chuck mechanism in a direction toward the side where the contents are accommodated. The sealing device according to claim 1 or 2 , characterized by the above. 4. The apparatus according to claim 1, further comprising an application mechanism that applies an adhesive layer for fixing the opening or the flap portion of the bag provided extending from the opening to the bag. 5 . The sealing device according to any one of the above. Characterized by further comprising a folding creasing mechanism comprising a shutter attaching a habit folded in contact with a portion of the bag, and sealing apparatus according to any one of claims 1 4. The sealing device according to any one of claims 1 to 5 , further comprising a presser that comes into contact with a side portion of the bag whose thickness direction is fixed by the fixing mechanism. The sealing device according to claim 6 , wherein the presser that comes into contact with the side portion of the bag is in contact with a position that is biased toward the opening side with respect to the center of the contents stored therein. A first step of fixing the bag containing the contents and not sealed;
Sandwiches the opening of the bag with a chuck mechanism, viewed contains a second step, the moving toward the side where the contents are accommodated,
The chuck mechanism includes a pair of rollers, and the pair of rollers grips the opening by sandwiching the opening,
The pair of rollers includes a small-diameter roller and a large-diameter roller, and the small-diameter roller is positioned forward in the moving direction of the chuck mechanism in the thickness direction of the bag, and the large-diameter roller is A sealing method, wherein the chuck mechanism is positioned rearward in the moving direction in the thickness direction of the bag . In the second step, the chuck mechanism is moved in the thickness direction of the bag while keeping the chuck mechanism holding the opening, and then moved in a direction toward the side where the contents are accommodated. The sealing method according to claim 8 , wherein the sealing method is performed. In the second step, the adhesive layer formed on a surface of the bag, characterized in that to fix the flap portion provided to extend from the opening or the openings in claim 8 or 9 The sealing method described. The sealing method according to claim 10 , comprising a step of forming the adhesive layer on the surface of the bag. The sealing method according to any one of claims 8 to 11 , wherein, in the first step, the side portion of the bag is pressed by a pressing tool together with the thickness direction of the bag. The sealing method according to any one of claims 8 to 12 , further comprising a step of bringing a shutter into contact with a part of the bag and folding the bag. The sealing method according to claim 8 , wherein the content is a bundle of print paper.

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