JP2011111215A - Sealing device and sealing method of hanging bag body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device and a sealing method of a hanging bag body capable of sealing an opening by preventing sealing failure even when a content is oversized relative to the size of the bag body or even when sealing tolerance is too small even in the case where loading the content into the hanging bag body and sealing the opening. <P>SOLUTION: In a header part 7 of the bag body 1, the header part 7 in a relaxed state is expanded flatly by a header part pressing mechanism 13. An upper rim of the opening 5 is brought in contact with the header part 7 by pressing the upper rim of the opening 5 relative to the flat header part 7 by a sealing part pressing mechanism 12, and in this state the opening upper rim is sealed by the sealing mechanism 12, which enables sealing of the opening by preventing the sealing failure. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging bag body sealing device and a sealing method, and when the contents are loaded into an individual packaging pouch that is a hanging type bag body and the opening is sealed, It is large, and the seal allowance is at least possible to prevent sealing failure and to seal.

  There is an individual packaging pouch (hanging pouch) which is a hanging type bag body in one of the bag bodies used when individually packaging products, for example, as shown in FIG. The bag body 1 is made of a thermoplastic resin film, and the front film 2 and the back film 3 are integrally continuous at the bottom, and the side edges 4 and 4 are heat-sealed to provide an opening 5 at the top. A bag body portion 6 is formed, and a header portion 7 is formed so as to wrap a header sheet 6 such as synthetic paper by extending the surface film 2 at the upper end portion of the opening portion 5. A hole 8 for suspending is formed, and the opening 5 can be sealed by heat-sealing the back film 3 of the opening 5 that overlaps the front film 2 of the header 7. In addition, the front and back of the front film and the back film are front and back for convenience of explanation, and do not necessarily coincide with the front and back of the pouch (bag body).

  In such a hanging pouch, when packaging a product, for example, an automatic product packaging device is used, and the bag body 1 is suspended at the center of the header portion 7 and the opening 5 of the bag body 1 is widened. After loading the contents from the opening 5, the opening 5 is closed by pressing the back film 3 of the opening 5 that overlaps the front film 2 of the header 7, and the closed opening 5 is heat-sealed. (For example, refer to Patent Documents 2 and 3).

Japanese Utility Model Publication No. 63-164449 JP 08-133236 A Japanese Patent Laid-Open No. 02-296628

However, if the contents are larger or heavier than the size of the bag body 6 of the bag 1, or if the distance from the upper end of the contents to the opening 5 is short and the seal allowance is small, the contents If the back film 3 constituting the upper edge of the opening 5 is pressed and applied to the front film 2 of the header 7 while being loaded, the front film 2 and the back film remain in a state in which the opening 5 is loosened. 3 is pressed, and the back film is caught by the lower end of the header portion, so that a wrinkle is formed in the central portion in the width direction, which causes a problem of seal failure (see FIG. 5).
In order to prevent such a sealing failure due to the generation of wrinkles, it is conceivable to make the bag body 1 large. However, the amount of resin film used increases, and the packaged product itself also increases in size and waste. There is a problem of becoming.

  The present invention has been made in view of the problems of the prior art, and the contents are larger than the size of the bag when loading the contents into a hanging bag and sealing the opening. It is another object of the present invention to provide a hanging bag body sealing device and a sealing method capable of preventing a sealing failure even when the sealing cost is small.

  In order to solve the above-described problem, a hanging bag body sealing device according to claim 1 of the present invention is hung through a header portion extended to an upper end portion of an opening portion, and the contents are received from the opening portion. A sealing device for sealing an opening of a loaded hanging bag, the header holding mechanism for pressing the header of the bag loaded with the contents, and the header held by the header holding mechanism In addition, a sealing portion pressing mechanism that presses and closes the upper edge portion of the opening of the bag body and a sealing mechanism that seals the upper edge portion of the opening portion of the closed bag body are provided.

  Moreover, in addition to the structure of Claim 1, the sealing apparatus of the hanging bag body of Claim 2 of this invention is the width direction of the bag body suspended by the said header part pressing mechanism in the width direction center part. It is characterized by comprising a header part presser bar which is driven to reciprocate to hold both end parts.

  Furthermore, in addition to the structure of Claim 1, the sealing device for the hanging bag body according to Claim 3 of the present invention is configured so that the header portion pressing mechanism is suspended in the width direction of the bag body suspended at the center portion in the width direction. It is characterized by comprising a suction mechanism that sucks and presses both ends from the back.

  According to a fourth aspect of the present invention, there is provided a method for sealing a suspended bag body, wherein the suspended bag body is suspended through a header portion extended to the upper end portion of the opening, and the contents are loaded from the opening. When sealing the opening of the bag, the step of expanding the opening of the bag and pressing the header of the bag loaded with the contents into a flat shape, and the bag with the header pressed flat It comprises a step of closing the opening by pressing the upper edge of the opening of the body and a step of sealing the upper edge of the opening of the closed bag.

  Furthermore, the sealing method of the hanging bag body according to claim 5 of the present invention is the bag suspended in the center in the width direction in addition to the configuration of claim 4, the step of pressing the header portion flat. It is characterized by comprising a step of pressing both ends in the width direction of the body.

  According to a sixth aspect of the present invention, in addition to the structure of the fourth aspect, in addition to the structure of the fourth aspect, the step of pressing the header portion flat is a bag suspended at the center in the width direction. It is characterized by comprising a step of sucking and pressing both ends in the width direction of the body from the back.

According to the sealing device for the hanging bag according to the first aspect of the present invention, the hanging bag body is hung through the header portion extended to the upper end portion of the opening portion and loaded with the contents from the opening portion. A sealing device for sealing an opening of a bag body, the header part pressing mechanism for pressing the header part of the bag body loaded with the contents, and the header of the bag body pressed by the header part pressing mechanism Since it has a seal part pressing mechanism that presses and closes the upper edge of the opening and a seal mechanism that seals the upper edge of the opening of the closed bag, the header part of the bag is The slackened header can be stretched flat, and the upper edge of the opening can be in close contact with the header by pressing the upper edge of the opening against the flat header with the seal-holding mechanism. In this state, the upper edge of the opening with the seal mechanism By sealing, it can be sealed to prevent the occurrence of sealing failure.
Thereby, it is only necessary to additionally install a header pressing mechanism, and it is possible to easily cope with an existing apparatus.

  Further, according to the hanging bag body sealing device according to claim 2 of the present invention, the header portion pressing mechanism is driven to reciprocate to hold both end portions in the width direction of the bag body suspended at the center portion in the width direction. Since the header part presser bar is configured, the upper edge part of the opening can be brought into close contact with the header part by pressing both ends of the bag suspended at the center part with the header presser bar that is driven reciprocally. By sealing the upper edge of the opening in this state, it is possible to prevent the occurrence of a sealing failure and perform sealing.

  Further, according to the hanging bag body sealing device according to claim 3 of the present invention, the header portion pressing mechanism sucks the width direction both end portions of the bag body suspended at the center portion in the width direction from the back surface. Since the bag body suspended at the center is sucked and pressed from the back by the suction mechanism, the upper edge of the opening can be brought into close contact with the header, and the opening is opened in this state. By sealing the upper end edge of the part, it is possible to prevent the occurrence of a sealing failure and perform sealing.

  Moreover, according to the sealing method of the hanging bag body of Claim 4 of this invention, it was suspended via the header part extended in the upper end part of the opening part, and the content goods were loaded from the opening part. When sealing the opening of the hanging bag body, the opening portion of the bag body was expanded to press the header portion of the bag body loaded with the contents, and the header portion was pressed flat. Since it comprises a step of closing the opening by pressing the upper edge of the opening of the bag and a step of sealing the upper edge of the opening of the closed bag, the header of the bag is made flat. The header part that has been loosened in the pressing process can be flattened and the upper edge part of the opening part can be attached to the header part by pressing the upper edge part of the opening part in the process of closing the opening part against the flat header part. In this state, the upper edge of the opening can be sealed in the sealing process. By sealing, it can be sealed to prevent the occurrence of sealing failure.

  Furthermore, according to the sealing method of the hanging bag body according to claim 5 of the present invention, the step of pressing the header portion in a flat shape is performed by using the width direction both ends of the bag body suspended at the center portion in the width direction. Since it consists of a pressing process, the upper edge of the opening can be brought into close contact with the header by pressing both ends of the bag suspended from the center, and the upper edge of the opening is sealed in this state. As a result, it is possible to seal while preventing the occurrence of a sealing failure.

  Moreover, according to the sealing method of the hanging bag body of Claim 6 of this invention, the width direction both ends of the bag body suspended in the width direction center part are the steps of pressing the header portion flat. Since it is composed of a process of sucking and pressing from the back, the upper edge of the opening can be brought into close contact with the header by sucking and pressing the bag suspended from the center, and the opening is opened in this state. By sealing the upper end edge of the part, it is possible to prevent the occurrence of a sealing failure and perform sealing.

1 is a schematic plan view according to an embodiment of a sealing device for a hanging bag body of the present invention and applied to an individual packaging device. It is a schematic sectional drawing concerning one Embodiment of the sealing apparatus of the hanging bag body of this invention. It is the schematic plan view and schematic front view which extracted the header part pressing mechanism concerning one Embodiment of the sealing apparatus of the hanging bag body of this invention. It is the front view and sectional drawing of one bag body of the sealing object by the sealing device of the hanging bag body of this invention. It is explanatory drawing of the opening state of a bag body, and explanatory drawing of a seal defect generation | occurrence | production state.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, for example, as shown in FIG. 1, this hanging bag body sealing device 10 is used in a heat seal stage of a product individual packaging device. In the individual packaging device 30, a bag body is provided at a bag body supply stage 31. 1 is supplied, and the central portion of the header portion 7 of the bag body 1 is gripped by a chuck, is rotated and driven by a clamp mechanism 33 of a transfer table 32 for transfer that is stopped at each stage, for example, two bag bodies 1 and 1 are suspended and conveyed to each stage.
Note that the bag body 1 may be clamped through the hole 8 for suspension.

The bag bodies 1, 1 suspended from the clamp mechanism 33 of the transport table 32 are sent to the printing stage 34, where necessary printing is performed by a hot printer, and then transported to the product input stage 35. In the product loading stage 35, the back film 3 of the bag 1 is sucked by the suction mechanism 36 to open the opening 5. For example, the contents are loaded by a human hand, and the product is securely pushed in and loaded. It is also possible to automate the loading of the content item. When the content item is small with respect to the size of the bag body 1, automation can be facilitated. Sometimes it is better.
In addition, an appropriate process can be added to the empty stage of the transfer table as necessary. Further, instead of sucking and opening the opening of the bag body by the suction mechanism, the distance between the side edges of the bag body 1 may be narrowed.
When gripping such a bag body, it is necessary to consider that if the grip is held with a chuck having the full width of the header portion, the opening does not widen and it becomes difficult to put in the product depending on the size of the product.

After that, the bag body 1 in which the contents are put into the heat seal stage 37 is transported by the transport table 32, heat-sealed by the hanging bag body sealing device 10, and then discharged.
The sealing device 10 for the hanging bag body used in the heat seal stage 37 includes a seal portion pressing mechanism 11 for pressing and closing the upper edge portion of the opening 5 of the bag body 1, and the closed bag body 1. In addition to being provided with a sealing mechanism 12 for heat-sealing the upper edge, which is the upper edge of the opening 5, the bag body 1 in a loosened state by pressing the header portion of the suspended bag body 1 is flattened. A header pressing mechanism 13 is provided that is in an extended state.

  The seal part presser mechanism 11 and the seal mechanism 12 are configured in the same manner as before, and in the seal part presser mechanism 11, a horizontal presser bar 11 a longer than the width of the bag body 1 is connected to a fluid pressure cylinder 11 b that constitutes a reciprocating drive mechanism. It is configured to be attached to the rod 11c, and by pressing the lower side of the upper edge of the opening 11 of the bag 11 to be sealed, the back film 3 is applied to the front film 2 of the bag 1 so that it can be closed. .

  The seal mechanism 12 includes a seal bar 12a provided with a heating unit capable of heat-sealing the bag body 1, and is a horizontal cylinder longer than the width of the bag body 1 so as to form a reciprocating drive mechanism. The front film 2 and the back film 3 of the bag 1 can be heat-sealed and sealed by crimping to the upper edge to be sealed of the opening 5 of the bag 1. is there.

  When the opening portion 5 of the bag body 1 is pressed and sealed with the seal portion pressing mechanism 11 and the sealing mechanism 12 as described above, when the contents are large or heavy, or from the upper end of the opening portion 5 to the upper end of the contents. When the distance is close, when the upper edge of the opening 5 of the bag body 1 is pressed, both the front film 2 and the back film 3 are in a loose state, so that wrinkles occur. A sealing failure will occur when sealing.

  Therefore, in the hanging bag body sealing device 10, a header portion pressing mechanism 13 is provided. The header portion pressing mechanism 13 includes a header portion pressing bar 13b including two pressing portions 13a and 13a that hold both sides of the suspension hole 8 of the header portion 7 of the bag body 1 and includes two bag bodies. Corresponding to 1 and 1, two header section pressing mechanisms 13 and 13 are provided. Each header portion pressing bar 13b is configured to be attached to a rod 13d of a fluid pressure cylinder 13c constituting a reciprocating drive mechanism, and presses both sides of the suspension hole 8 of the header portion 7 of the bag body 11, thereby The slender header portion 7 of the body 1 can be extended flatly to the width of the front film 2 and the back film 3.

A description will be given of the sealing method as well as the operation of the hanging bag body sealing device 10 provided with the seal portion pressing mechanism 11, the sealing mechanism 12, and the header portion pressing mechanism 13 as described above.
The bag body 1 transported to the heat seal stage 37 by the transport table 32 and suspended by the clamp mechanism 33 is in a state in which the opening 5 of the bag body 1 is opened depending on the weight and size of the contents, and the header section 7 and The front and back films 2 and 3 on the upper edge of the opening 5 are in a loose state.

Therefore, first, the header pressing mechanism 13 of the hanging bag seal device 10 is operated to extend the rod 13d of the fluid pressure cylinder 13c, and the two pressing parts 13a and 13a of the header pressing bar 13b are used to form the bag. The both sides of the suspension hole 8 of the header portion 1 are pressed.
As a result, the header portion 7 of the bag 1 is pressed against the flat vertical surface of the clamp mechanism 33, and is stretched from a slack state to a slack state corresponding to the width of the front and back films 2, 3 and is held flat.

Thereafter, the seal portion pressing mechanism 11 operates to extend the rod 11c of the fluid pressure cylinder 11b, and press the upper edge portion of the opening 5 of the bag body 1 with the pressing bar 11a.
As a result, the back film 3 of the opening portion 5 is pressed against the header portion 7 of the bag body 1 that is stretched and pressed flat without any slack, and is applied to the front film 2 of the opening portion 5 to open the opening. It adheres to the upper end edge of the part 5 in a closed state with a gap for sealing.

Thus, after the front and back films 2 and 3 of the opening 5 are stretched flat and brought into close contact with each other, the seal mechanism 12 is operated, the rod 12c of the fluid pressure cylinder 12b is extended by the seal bar 12a, and the front and back films 2 are heated by heating means. The top film 2 and the back film 3 of the bag 1 are heat-sealed and sealed by press-bonding the upper edge of the opening 5 of the bag 1 with a seal bar 12a heated to a heat sealing temperature of 3 or higher.
As a result, the front film 2 and the back film 3 of the continuous opening 5 are in close contact with the header portion 7 of the bag body 1 that is stretched and pressed flat without any slack, and the seal is poor such as wrinkles. It is possible to achieve a sealed closed state by completely preventing this.

According to such a hanging bag body sealing device 10 and the sealing method, the suspension bag is suspended through the header portion 7 extended to the upper end portion of the opening portion 5 and the contents are loaded from the opening portion 5. A sealing device that seals the opening portion 5 of the lower bag body 1, and a header portion pressing mechanism 13 that holds the header portion 7 of the bag body 1 loaded with contents, and the header portion pressing mechanism 11 holds the header portion 7. A seal holding mechanism 11 that presses and closes the upper edge of the opening 5 of the bag body 1 and a seal mechanism 12 that seals the upper edge of the opening 5 of the closed bag 1. The header portion 7 of the bag body 1 that has been loosened by the header portion pressing mechanism 13 can be flattened, and the upper edge of the opening 5 can be pressed against the flat header portion 7 with the seal portion. By pressing the mechanism 12, the upper edge of the opening 5 is attached to the header 7. Can be deposited, in this state, by sealing the opening upper end with a sealing mechanism 12, it can be sealed to prevent the occurrence of sealing failure.
Thereby, it is only necessary to additionally install the header holding mechanism 13 and it is possible to easily cope with an existing apparatus.

  Moreover, since the header part pressing mechanism 13 is constituted by the header part pressing bar 13b that is driven to reciprocate to press both ends in the width direction of the bag body 1 suspended in the center part in the width direction, the bag suspended in the center part. By pressing both end portions of the body 1 with the header portion pressing bar 13b that is driven to reciprocate, the upper edge portion of the opening portion 5 can be brought into close contact with the header portion 7, and the upper end edge portion of the opening portion is sealed in this state. Therefore, it is possible to seal by preventing the occurrence of defective sealing.

  In the above embodiment, the header holding mechanism is configured to hold the both ends of the bag suspended at the center with the header holding bar that is driven to reciprocate. The process of pressing the presser mechanism and the header part may be configured by a suction mechanism and a suction process that sucks and presses both ends in the width direction of the bag suspended from the center in the width direction from the back. By sucking and pressing the suspended bag body from the back with a suction mechanism or suction process, the upper edge of the opening can be brought into close contact with the header, and in this state, the upper edge of the opening is sealed. It is possible to seal by preventing the occurrence of sealing failure.

In the above embodiment, a case where two bags are processed in one stage has been described as an example. However, the present invention is not limited to this, and one bag or three or more bags are used. You can also.
Further, the reciprocating drive mechanism of the header holding bar is not limited to the fluid pressure cylinder, but may be constituted by other mechanisms such as an electric cylinder or a servo motor, and can hold the slack header part flatly. I just need it.

DESCRIPTION OF SYMBOLS 1 ... Bag body 2 ... Front film 3 ... Back film 4 ... Both sides edge part 5 ... Opening part 6 ... Bag body part 7 ... Header part 8 ... Suspension hole 10 ... Sealing device of hanging bag body 11 ... Seal part presser Mechanism 11a: Presser bar 11b: Fluid pressure cylinder (reciprocating drive mechanism)
11c ... Rod 12 ... Sealing mechanism 12a ... Seal bar 12b ... Fluid pressure cylinder (reciprocating drive mechanism)
12c ... Rod 13 ... Header part pressing mechanism 13a ... Holding part 13b ... Header part pressing bar 13c ... Fluid pressure cylinder (reciprocating drive mechanism)
13d ... Rod 30 ... Individual packaging device 31 ... Bag body supply stage 32 ... Transfer table 33 ... Clamp mechanism 34 ... Printing stage 35 ... Product input stage 36 ... Adsorption mechanism 37 ... Heat seal stage

Claims (6)

A sealing device that seals an opening of a suspended bag body that is suspended through a header portion that extends to the upper end of the opening and is loaded with contents from the opening,
Header part pressing mechanism for pressing the header part of the bag body loaded with the contents, and seal part pressing mechanism for pressing and closing the upper edge of the opening of the bag body with the header part pressed by the header part pressing mechanism And a sealing mechanism for sealing the suspended bag, comprising a sealing mechanism for sealing the upper edge of the opening of the closed bag.   2. The hanging bag body according to claim 1, wherein the header portion pressing mechanism is constituted by a header portion pressing bar that is reciprocally driven to hold both ends in the width direction of the bag body that is suspended at the center portion in the width direction. Sealing device.   2. The suspension bag body according to claim 1, wherein the header portion pressing mechanism is configured by a suction mechanism that sucks and holds both end portions in the width direction of the bag body suspended at the center portion in the width direction from the back surface. Sealing device. When sealing the opening of the hanging bag body that is suspended through the header portion extended to the upper end of the opening and loaded with the contents,
Expanding the opening of the bag body and pressing the header portion of the bag body loaded with the contents into a flat shape; and pressing the upper edge of the opening portion of the bag body in which the header portion is pressed flat. A method for sealing a suspended bag comprising: a step of closing an opening; and a step of sealing an upper end edge of the opening of the closed bag.   5. The method for sealing a suspended bag according to claim 4, wherein the step of pressing the header portion flatly comprises a step of pressing both ends in the width direction of the bag suspended from the center in the width direction. .   5. The suspension according to claim 4, wherein the step of pressing the header portion in a flat shape is a step of sucking and pressing both widthwise end portions of the bag suspended from the center in the width direction from the back side. How to seal the bag.

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