JP2015081142A - Method and apparatus for manufacturing sealed bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an efficient method for manufacturing a sealed bag, which combines high quality with safety, and an apparatus for manufacturing the sealed bag.SOLUTION: A method for manufacturing a sealed bag includes a connection part detection step of detecting a connection part of a film, and a distance measuring step of obtaining a film carrying distance. When the connection part is detected by the connection part detection step, a film carrying speed until the carrying distance measured by the distance measuring step reaches a predetermined distance is changed to a low speed lower than a standard speed.

Description

  The present invention relates to a sealed bag manufacturing method and a sealed bag manufacturing apparatus, and more particularly, to a sealed bag manufacturing method in which a bag is filled with contents by a vertical bag making and filling machine. It relates to a manufacturing apparatus.

  A bag making and filling machine is used as a device for making a bag from a packaging material continuously extending in a film shape and filling a bag with contents such as liquid and powder and sealing the bag. For the packaging material, a long film wound in a roll is used as an original roll in order to efficiently produce bags without interruption of work or replacement during operation of the bag making and filling machine. The long film has a length of, for example, 500 m or 1000 m. A long film is manufactured by connecting ends of a plurality of films to each other. Furthermore, when there is a poorly laminated part or a poorly printed part on the film, the part may be removed and then connected again. Therefore, a joint part (joint) may appear during the operation of the bag making and filling machine. And the bag making and filling machine which forms a bag by carrying and heat-sealing a film continuously heat-seals a film similarly also in the location of a connection part.

  In Patent Document 1, at least one seal roll of a horizontal seal roll is provided so as to be movable, a pressing unit that presses at least one seal roll toward the other seal roll, and a film from a pair of horizontal seal rolls. There is provided a joint detecting means provided upstream in the transfer direction for detecting a joint of the film, and a control unit for reducing or releasing the pressing force by the pressing means after a predetermined time has elapsed when the joint of the film is detected by the joint detecting means. A packaged apparatus is disclosed.

Japanese Patent No. 2940537

  Adhesive tape is affixed to the connecting portion where the film as the packaging material is connected. The film is thickened by the adhesive tape. When the film is folded in half and heat sealed, the thickness further increases. Furthermore, both the film and the adhesive tape having different properties are heat sealed together. For this reason, the film is not sufficiently heated and melted, and in particular, sufficient adhesive strength cannot be obtained at the joint portion, which causes the contents to leak from the sealed bag. Thus, since it is difficult to heat-seal the joint part of the film, the joint part was excluded after the filling operation of the bag making and filling machine was stopped.

  In Patent Document 1, when a joint is detected, after a predetermined time has elapsed, the pair of horizontal seal rolls are separated from each other without passing through the joint, and further, the supply of contents is stopped. Yes. However, even if control for stopping filling is performed, the supply of contents cannot be stopped immediately due to the structure of the machine, and dripping occurs from the filling nozzle. Further, when filling is resumed, several bags are required until the quantity is stabilized, so that many contents and packaging materials that are not products are generated from the stop of filling to the restart. At that time, if the contents are expensive, it is a big problem that the amount of loss due to the passage of the connecting portion increases. Therefore, it is necessary to take an effective measure when the connecting portion passes particularly the heat seal portion.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sealed bag manufacturing method and a sealed bag manufacturing apparatus that have high efficiency, high quality, and safety.

In order to solve the above problems, the manufacturing method of the sealed bag of the present invention,
A conveying step of continuously sending the film from the raw roll,
A vertical sealing step of heat-sealing the side edge of the film conveyed downward by the conveying step; and
A filling step of filling the contents inside the cylindrical film body formed into a cylindrical shape by the vertical sealing step;
A transverse sealing step of intermittently heat-sealing the tubular film body filled with the contents by the filling step so as to cross the direction of conveyance;
In a manufacturing method of a sealed bag comprising: a series of sealed bags formed by the transverse sealing step, and a separation step of individually separating the sealed bags at the location heat-sealed in the transverse sealing step,
A connecting portion detecting step for detecting a connecting portion of the film;
A distance measuring step for determining the transport distance of the film,
When the connecting portion is detected by the connecting portion detecting step, the film transport speed until the transport distance measured by the distance measuring step reaches a predetermined distance is slower than the standard speed. It is characterized by changing to a low speed.

  In addition, the predetermined distance here is a distance from the time when the joint portion of the film is detected until it passes through the vertical sealing step. Furthermore, the standard speed here is a film conveyance speed at the time of filling the contents, and is 8 to 20 m / min in the case of the apparatus exemplified in this embodiment.

  Furthermore, while the conveyance speed is changed to the low speed, the filling speed of the contents is reduced in the filling step.

  Furthermore, the filling process of filling the contents is stopped while the transport speed is changed to the low speed.

  Further, in the subsequent stage of the separation step, a sealing bag with a connecting portion including the connecting portion of the sealing bag, and a sealing bag before and after the sealing bag with the connecting portion are connected to the other sealing bags. It further comprises a discharging step for sorting.

  Further, the separation step of individually separating the heat-sealed portions in the lateral sealing step at both ends of the sealing bag with the connecting portion is stopped.

Further, the predetermined distance includes a first distance and a second distance,
The first distance is from a position at which the joint portion is detected by the joint detection process to a position immediately before the film is heat-sealed by the vertical sealing process.
The second distance is a distance that passes when the connecting portion is heat-sealed by the vertical sealing step.
At least during the second distance, the conveyance speed of the film is changed to a low speed slower than a standard speed.

  Further, the film is marked with a mark indicating the connecting portion.

Furthermore, it further comprises a bi-folding step of bi-folding the film sent out from the raw fabric roll,
The cylindrical film is heat-sealed by stacking both side edges of the film that overlap each other in the bi-folding process in the vertical sealing process.

Furthermore, it has two said films sent out from two said original fabric rolls,
The cylindrical film is characterized by being heat-sealed by superimposing both side ends of the two opposing films by the vertical sealing step.

Furthermore, while not being heat-sealed by the horizontal sealing step, the conveyance speed is controlled to be the first speed,
While being heat-sealed by the horizontal sealing step, the conveyance speed is controlled to be the second speed,
The first speed is different from the second speed.

  Further, each of the pair of heat sealers to be heat-sealed in the transverse sealing step has protrusions, and when the pair of heat sealers rotate, the protrusions intermittently come into contact with each other to sandwich the tubular film body. It is characterized by doing.

  Further, each of the pair of heat sealers to be heat-sealed in the transverse sealing step has a protruding portion, and the cylinder is moved by a box motion in which the protruding portions are always opposed to each other with the cylindrical film body interposed therebetween, and the cylinder motion is rotated. The projecting portions move while contacting each other in accordance with the conveyance of the film-like film body, and heat-sealing is performed with the tubular film body interposed therebetween.

The manufacturing apparatus of the sealed bag of the present invention includes:
A transport section for continuously feeding the film from the raw roll,
A vertical seal part that heat-seals the side edges of the film conveyed downward by the conveyance unit;
A filling portion for filling the contents into a cylindrical film body formed into a cylindrical shape by the vertical seal portion;
A transverse seal portion that intermittently heat-seals the tubular film body filled with the contents by the filling portion so as to cross the direction of conveyance;
In a sealed bag manufacturing apparatus, comprising: a separation unit that individually separates a series of sealed bags formed by the lateral seal portion at a location heat-sealed by the lateral seal portion;
A connecting part detecting unit for detecting a connecting part of the film;
A distance measuring unit for determining the transport distance of the film,
When the connection part is detected by the connection part detection unit, the film conveyance speed until the conveyance distance measured by the distance measurement unit reaches a predetermined distance is slower than the standard speed. It is characterized by changing to a low speed.

According to the manufacturing method of the sealed bag of the present invention,
A conveying step of continuously sending the film from the raw roll,
A vertical sealing step of heat-sealing the side edges of the film conveyed downward by the conveying step;
A filling step of filling the contents inside the cylindrical film body formed into a cylindrical shape by the vertical sealing step;
A transverse sealing step that intermittently heat-seals the tubular film body filled with the contents by the filling step so as to cross the direction in which it is conveyed;
In a manufacturing method of a sealed bag comprising: a series of sealed bags formed by a horizontal sealing step, and a separation step of individually separating the sealed bag at a location heat-sealed in the horizontal sealing step,
A connecting portion detecting step for detecting a connecting portion of the film;
A distance measuring process for determining the transport distance of the film,
When the connection part is detected by the connection part detection process, the film conveyance speed until the conveyance distance measured by the distance measurement process reaches a predetermined distance is changed to a low speed slower than the standard speed. It is characterized by.

  For this reason, the manufacturing method of the sealing bag which is efficient, has high quality, and safety can be provided.

  Furthermore, according to the manufacturing method of the sealed bag of this invention, while the conveyance speed is changed to low speed, the speed which fills the content in a filling process is reduced.

  For this reason, the loss amount of the film at the time of a connection part and the loss of the content can be suppressed, and the manufacturing method of the sealing bag which has more efficient, high quality, and safety | security can be provided.

  Furthermore, according to the manufacturing method of the sealed bag of the present invention, the filling process of filling the contents is stopped while the conveyance speed is changed to a low speed.

  For this reason, it is possible to provide a method for manufacturing a sealed bag that further suppresses the loss of film and contents when passing through the connecting portion, and that is more efficient, combines high quality, and safety.

  Furthermore, according to the manufacturing method of the sealing bag of the present invention, the sealing bag with the connecting part including the connecting part in the sealing bag and the sealing before and after the connecting part with the connecting part are provided after the separation step. The method further includes a discharging step of sorting the bag from other sealed bags.

  For this reason, the filling product including the joint part and the filling product before and after the joint part are automatically excluded, the sorting time and labor are reduced, and the sealing is performed with higher efficiency, higher quality and safety. A method for manufacturing a bag can be provided.

  Furthermore, according to the manufacturing method of the sealing bag of the present invention, the separation step of individually separating the heat-sealed portions in the lateral sealing step at both ends of the sealing bag with the connecting portion is stopped.

  For this reason, the filling product including the joint part and the filling product before and after the gathering are gathered, and the time and labor for sorting are reduced, and the manufacturing of the sealed bag having high efficiency and high safety is achieved. A method can be provided.

Furthermore, according to the manufacturing method of the sealed bag of the present invention, the predetermined distance includes the first distance and the second distance,
The first distance is from the position where the joint portion is detected by the joint detection process to the position just before the film is heat sealed by the vertical sealing process,
The second distance is a distance that passes when the joint portion is heat-sealed by the vertical sealing step,
At least during the second distance, the film transport speed is changed to a low speed slower than the standard speed.

  For this reason, it is possible to limit the section where the film conveyance speed is changed to a low speed slower than the standard speed to the section where the connecting portion passes through the vertical seal portion, which is more efficient and combines high quality and safety. A method for manufacturing a sealed bag can be provided.

  Furthermore, according to the manufacturing method of the sealing bag of this invention, the mark which shows a connection part is attached | subjected to a film, It is characterized by the above-mentioned.

  For this reason, it is possible to discriminate the connecting portion where patterns and other marks are printed on the film, and to provide a method for manufacturing a sealed bag that is more efficient, combines high quality and safety. it can.

Furthermore, according to the manufacturing method of the sealed bag of the present invention, it further includes a bi-folding step of bi-folding the film fed from the raw roll,
The cylindrical film is characterized in that it is heat-sealed by superimposing both side edges of films that overlap each other in a bi-folding process by a vertical sealing process.

  For this reason, the manufacturing method of the sealing bag which combines efficiency, high quality, and safety | security from one film can be provided.

Furthermore, according to the manufacturing method of the sealing bag of this invention, it has two films sent out from two original fabric rolls,
The cylindrical film is characterized in that it is heat-sealed by superimposing both side ends of two opposing films in a vertical sealing step.

  For this reason, the manufacturing method of the sealing bag which combines efficiency, high quality, and safety from two films can be provided.

Furthermore, according to the manufacturing method of the sealed bag of the present invention, while not being heat-sealed by the horizontal sealing step, the conveyance speed is controlled to be the first speed,
While being heat-sealed by the horizontal sealing process, the conveyance speed is controlled to be the second speed,
The first speed is different from the second speed.

  For this reason, it is possible to provide a method for manufacturing a sealed bag that is more efficient, has high quality, and is safe while sufficiently securing the time for transverse heat sealing.

  Furthermore, according to the manufacturing method of the sealed bag of the present invention, each of the pair of heat sealers to be heat-sealed in the horizontal sealing step has a protruding portion, and when the pair of heat sealers rotate, the protruding portions abut on each other intermittently. It is characterized by heat-sealing with a film-like film sandwiched therebetween.

  For this reason, it is possible to provide a method for manufacturing a sealed bag having a simple structure and sufficient efficiency, high quality, and safety while ensuring sufficient time for transverse heat sealing.

  Furthermore, according to the manufacturing method of the sealing bag of this invention, each of a pair of heat sealer heat-sealed by a horizontal sealing process has a protrusion part, and a protrusion part always opposes on both sides of a cylindrical film body, and synchronizes By the box motion that moves in a swiveling manner, the projecting portions move while abutting each other in accordance with the conveyance of the tubular film body, and heat sealing is performed with the tubular film body interposed therebetween.

  For this reason, it is possible to provide a method for manufacturing a sealed bag that is more efficient, has both high quality and safety while ensuring a sufficient time for transverse heat sealing.

According to the sealed bag manufacturing apparatus of the present invention, a transport unit that continuously sends a film from a raw fabric roll,
A vertical seal part that heat-seals the side edges of the film that is conveyed downward by the conveyance part; and
A filling portion that fills the inside of the cylindrical film body formed into a cylindrical shape by the vertical seal portion; and
A transverse seal portion that intermittently heat-seals the tubular film body filled with the contents by the filling portion so as to cross the direction of conveyance;
In a sealed bag manufacturing apparatus, comprising: a separation part that individually separates a series of sealed bags formed by a transverse seal part at a location where heat sealing is performed at the transverse seal part;
A connection part detection unit for detecting a connection part of the film;
A distance measuring unit that determines the transport distance of the film,
When the connection part is detected by the connection part detection unit, the film conveyance speed until the conveyance distance measured by the distance measurement unit reaches a predetermined distance is changed to a lower speed than the standard speed. It is characterized by.

  For this reason, the manufacturing apparatus of the sealing bag which is efficient, has high quality, and safety can be provided.

It is the schematic by which an example of the vertical bag making aseptic filling machine used for manufacture of the sealing bag which concerns on this embodiment was shown. It is a principal part side view of FIG. An example of a structure of a horizontal sealing roller is shown, A is a whole perspective view, B is a B arrow side view of FIG. 3A. An example of the configuration of the connecting portion is shown, in which A is a cross-sectional view of the connecting portion on which the film is laminated, B is a cross-sectional view of the connecting portion on which the film is butt-bonded, and C is a plan view of the connecting portion. FIG. 3 is a front view as viewed in the direction of arrow V in FIG. 2, A is a view showing a state of a film between the guide bar and the vertical seal portion, and B is a tubular film between the vertical seal portion and the horizontal seal portion. It is a figure which shows the state of a body. A is an enlarged side view for explaining a state in which a tubular film body is heat-sealed by a horizontal sealing roller, and B is a front view of a series of sealed bags formed by being heat-sealed by a horizontal sealing roller. . It is a control block diagram of the principal part. It is a flowchart for demonstrating operation | movement at the time of the detection of a connection part. It is the sealing bag manufactured with the manufacturing apparatus of the sealing bag which concerns on this embodiment, Comprising: A is a perspective view and B is B sectional drawing of FIG. 9A. It is a modification of a sealing bag, Comprising: A is a perspective view and B is B arrow sectional drawing of FIG. 10A. It is a principal part side view of the vertical bag making aseptic filling machine which concerns on 2nd Embodiment. It is a principal part side view of the vertical bag making aseptic filling machine which concerns on 3rd Embodiment. It is a principal part side view of the vertical bag making aseptic filling machine which concerns on 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration of the apparatus according to the present embodiment will be described. FIG. 1 is a schematic view showing an example of a vertical bag making aseptic filling machine 1 used for manufacturing a sealed bag according to this embodiment. The vertical bag making aseptic filling machine 1 mainly includes a conveying unit 10, a vertical sealing unit 20, a filling unit 30, a horizontal sealing unit 40, and a separating unit (cutter 60).

  The vertical bag-making aseptic filling machine 1 according to the present embodiment includes a packaging material supply section (supply section), a packaging material supply section (feeding section), and a packaging material supply section. The sterilization part (sterilization part) is connected. A film FL as a packaging material is prepared as an original roll R wound in a roll shape. The supply unit is provided with an unwinding roller RA for rotatably mounting the original fabric roll R, and a pair of nip rollers NR for continuously feeding the film FL from the original fabric roll R. The nip roller NR is connected to a servo motor (not shown) as a drive source. The nip roller NR serves as one end of the transport unit 10. An elastic body such as rubber is used for the nip roller NR.

  FIG. 1 illustrates a vertical bag making aseptic filling machine 1 provided with one unwinding roller RA. However, the vertical bag making aseptic filling machine 1 may be provided with a plurality of unwinding rollers RA. For example, even if two unwinding rollers RA are provided, and a film connecting device is provided that adheres the terminal end of one original roll R and the start end of the other original roll R to make the film FL continuous. good.

  The supply unit is provided with a shutter 2 on a wall separating the sterilization unit. Furthermore, the opening 3 which enables the film FL to pass between a supply part and a sterilization part is provided in a supply part by opening the shutter 2. As shown in FIG.

  The sterilizing unit has a sterilizing liquid tank 4. The sterilizing liquid tank 4 is configured such that the film FL conveyed from the supply unit passes through the tank containing the sterilizing agent. For example, hydrogen peroxide water is used as the disinfectant.

  A hot air nozzle 5 is provided above the sterilizing liquid tank 4. The hot air nozzle 5 as a drying part is comprised by a pair arrange | positioned so that film FL may be pinched | interposed so that a hot air may be sprayed with respect to the film FL after passage of the sterilization liquid tank 4, for example. The hot air is set to a temperature at which the bactericidal agent adhering to the film FL is evaporated and the film FL is not altered.

  A cold air nozzle 6 is provided above the hot air nozzle 5. The cold air nozzle 6 as a cooling part is comprised by a pair arrange | positioned so that film | membrane FL may be pinched | interposed so that cold air may be blown with respect to the film FL after the hot air nozzle 5 passage. The cold air nozzle 6 is provided in order to prevent deterioration of physical properties such as reduction in slipperiness and occurrence of curling due to heating of the film FL, and to maintain processability. The cold air nozzle 6 also has a function of complementing the evaporation of the sterilizing agent. The temperature of the cold air may be normal temperature.

  The hot air nozzle 5 and the cold air nozzle 6 are provided in the sterilization region 7 of the vertical bag making aseptic filling machine 1 together with the portion where bag making and contents are filled. Since the sterilized area 7 is maintained in a sterilized state, a positive pressure is maintained with aseptic air, and invasion of bacteria from the outside is prevented. The film FL after passing through the sterilizing section is subjected to various treatments in the aseptic area 7. In addition, after the bag is filled with the contents and the bag is sealed, it is not always necessary to perform aseptic processing. For this reason, various processes are performed in the non-sterile region 8 connected to the sterile region 7 in the process after sealing the bag.

  The vertical bag making aseptic filling machine 1 is configured to carry out bag making and filling contents while conveying the film FL from above to below. The guide roller 11 is disposed above a portion where bag making and filling of contents are performed. The guide roller 11 is a driven roller for guiding the aseptically processed and dried film FL vertically downward. Such a guide roller 11 is also included in the transport unit 10.

  The vertical seal portion 20 is located below the guide roller 11. The vertical sealing unit 20 is configured to heat-seal continuously by overlapping the side end portions of the film FL conveyed downward by the guide roller 11 of the conveying unit 10. A film FL in which the side end portion is heat-sealed at the vertical seal portion 20 to form a tubular shape is referred to as a tubular film body TU.

  The vertical bag making aseptic filling machine 1 includes a filling unit 30 at a position close to the vertical seal unit 20. The filling unit 30 is for filling the contents CT inside the tubular film body TU. The filling unit 30 includes a supply tank (not shown) for storing the contents CT, a pump (not shown) for sending the contents CT, a tubular filling nozzle 31 serving as a path for the contents CT, and the like. The filling nozzle 31 is provided so as to be capable of stationary cleaning and stationary sterilization. Safety can be enhanced while suppressing the time, labor and cost required for cleaning and sterilization. The filling nozzle 31 is connected to the supply tank via a pump.

  The filling nozzle 31 extends downward from the outside of the transport path of the film FL or the tubular film body TU via a curved portion above the vertical seal portion 20. The filling nozzle 31 extending downward is located at least inside the cylindrical film body TU formed in a cylindrical shape by the vertical seal portion 20 beyond the vertical seal portion 20, and the tip thereof is above the horizontal seal portion 40. Located in.

  The content CT filled in the sealed bag according to the present embodiment has fluidity, and foods, detergents, pharmaceuticals, and the like are suitable examples. More specifically, soft cream raw materials, tomato sauce, tomato paste, mayonnaise, cooked curry or stew, laundry detergent, shampoo, rinse, pharmaceuticals are exemplified as the contents CT. However, the content CT is not limited to these.

  The lateral seal portion 40 is located below the tip of the filling nozzle 31. The horizontal sealing part 40 heat-seals the tubular film body TU filled with the contents CT by the filling part 30 with respect to the transport direction, that is, in the width direction of the tubular film body TU. . A continuous form in which the tubular film TU filled with the contents CT is heat-sealed and sealed by the lateral seal portion 40 is referred to as a series of sealed bags PD1.

  The cutter 60 serving as the separation portion is located below the horizontal seal portion 40. As described above, since the separation portion corresponds to a process after sealing the bag, the cutter 60 is provided in the non-sterile region 8. However, the cutter 60 may be provided in the aseptic region 7. The cutter 60 separates a series of sealed bags PD <b> 1 formed by the horizontal seal portion 40 at a place where the horizontal seal portion 40 is heat-sealed. In addition, the form cut | disconnected separately from the series of sealing bag PD1 which is a continuous package shape is called individual sealing bag PD2. The individual sealed bags PD2 thus packaged are products.

  The vertical bag making aseptic filling machine 1 according to the present embodiment further includes a color sensor 80 as an example of a connection part detection unit that detects a connection part of the film FL. The color sensor 80 detects a connecting portion formed on the film FL that is continuously conveyed. The color sensor 80 illustrated in FIG. 1 is provided in the non-sterile region 8. The color sensor 80 acquires an image of the film FL between the cold air nozzle 6 and the guide roller 11 through the glass separating the aseptic region 7 and the non-sterile region 8. However, the color sensor 80 may be disposed anywhere between the unwinding roller RA and the vertical seal portion 20.

  Although the device used as the connecting portion detection unit is not limited to the color sensor 80, the determination of the connecting portion of the film FL is preferably based on non-contact, and more preferably based on reflected light. If it is non-contact, the film FL will not be deformed or scratched. Furthermore, if it is non-contact, even when the color sensor 80 is arranged between the guide roller 11 and the vertical seal portion 20, the connecting portion of the film FL can be determined, and the vertical bag making aseptic filling is possible. The degree of freedom of arrangement of each part in the machine 1 is improved. And although it depends on the forming method of the connecting portion, if it is reflected light, the connecting portion can be discriminated when the film FL and the connecting portion do not have translucency, for example, when metal is deposited. .

  Further, it is preferable that the connection portion of the film FL is determined by color. By performing the determination based on the color, for example, it is possible to execute a predetermined control in accordance with the type of color of the reflected light from the connecting portion.

  The vertical bag making aseptic filling machine 1 according to this embodiment further includes a distance measuring unit 90. The distance measuring unit 90 measures the transport distance of the film FL. FIG. 1 shows an example in which a rotary encoder 92 that measures the rotational displacement of the transport roller 91 that constitutes the transport unit 10 is provided as the distance measuring unit 90. The distance measuring unit 90 may be provided in another transport unit 10 such as the nip roller NR. In this case, it is not necessary to add a new device, and the cost can be reduced. Further, a non-contact device such as a laser surface velocimeter may be used for the distance measuring unit 90. In this case, the freedom degree of arrangement | positioning of each part in the vertical bag making aseptic filling machine 1 improves.

  Next, the bag making and the portion where the contents CT are filled will be described in detail. FIG. 2 is a side view of the main part of FIG. 1, and shows a range from the guide roller 11 to the formation of the individual sealed bag PD <b> 2 by the cutter 60.

  A rod-shaped guide bar 12 is provided below the guide roller 11. The guide bar 12 is a two-fold portion that folds the film FL conveyed vertically from the guide roller 11 in the center in the width direction. The guide bar 12 extends in a substantially horizontal direction from the front side to the back side in FIG. 2 to reach a curved portion, and extends in a substantially vertical downward direction from the curved portion. The guide bar 12 is positioned substantially in the center with respect to the width direction of the film FL guided vertically downward by the guide roller 11. The film FL that is folded in half by the guide bar 12 is referred to as a folded film FL1. In FIG. 2, two side end portions of the bi-fold film FL1 are shown with the guide bar 12 interposed therebetween.

  The vertical seal portion 20 includes a pair of vertical seal rollers 21 and 21 having a circular cross section in a side view. As schematically shown in FIG. 1, the vertical seal rollers 21 and 21 have protrusions protruding toward the outside in the radial direction at locations corresponding to the vicinity of the side end portions of the bi-fold film FL1. The vertical seal rollers 21 and 21 incorporate a heating device (not shown). At least the surface layer of the protrusions of the vertical seal rollers 21 and 21 is formed of a material having high thermal conductivity, for example, metal. And the film FL can be heat-sealed by heating the surface layer of the protrusion part of the vertical seal rollers 21 and 21 with a heat generating apparatus.

  The vertical sealing rollers 21 and 21 are disposed below the guide bar 12 and sandwich the two side end portions of the bi-fold film FL1. The vertical seal rollers 21 and 21 are connected to a servo motor (not shown) as a drive source through a gear or the like. And a pair of vertical seal rollers 21 and 21 are comprised so that each may rotate synchronizing with the reverse direction as shown by the arrow in FIG. The pair of vertical seal rollers 21 and 21 are configured to rotate at the same rotational speed in the direction in which the fold film FL1 is sandwiched and conveyed downward. Therefore, the vertical seal rollers 21 and 21 serve as one end of the transport unit 10.

  A filling nozzle 31 is disposed between the two side end portions of the folded film FL1 so as to extend from the near side in FIG. 2 toward the far side. As described above, the filling nozzle 31 extends downward via the upper curved portion of the vertical seal portion 20, and the lower end 31 </ b> E that is the tip thereof is located above the horizontal seal portion 40. In consideration of manufacturing efficiency, it is preferable that the distance between the lower end 31E of the filling nozzle 31 and the lateral seal portion 40 is not so great from the viewpoint of suppressing foaming during filling of the contents CT.

  A pair of adjusting rollers 50 and 50 are provided between the lower end 31E of the filling nozzle 31 and the horizontal seal portion 40 so as to sandwich the tubular film body TU. The pair of adjustment rollers 50 and 50 are configured to be able to change the interval between them. When the interval between the adjustment rollers 50 and 50 is reduced, the filling amount of the contents CT in the cylindrical film body TU can be reduced. When the interval between the adjustment rollers 50 and 50 is increased, the inside of the cylindrical film body TU is increased. The filling amount of the contents CT can be increased. According to such a configuration of the adjustment rollers 50 and 50, the filling amount of the contents CT can be adjusted without increasing or decreasing the conveyance speed of the tubular film body TU, and different products are manufactured by one manufacturing apparatus. be able to.

  The intervals between the adjusting rollers 50 and 50 may be adjusted according to the viscosity of the contents CT. Specifically, when the viscosity of the content CT is high, the interval between the adjustment rollers 50 and 50 is widened to facilitate passage of the content CT, and when the viscosity of the content CT is low, the adjustment roller 50, The interval of 50 is narrowed to make it difficult to pass through the contents CT. By doing so, the filling amount can be adjusted without depending on the viscosity of the contents CT without increasing or decreasing the transport speed of the tubular film body TU. The adjustment rollers 50 and 50 also have an effect of stabilizing the lateral seal position. The adjusting rollers 50 and 50 are driven to rotate.

  The lateral seal portion 40 includes a pair of lateral seal rollers 41 and 41 having a projecting portion 41P that has a substantially circular cross section in a side view shown in FIG. 2 and projects outward in the radial direction, for example. FIG. 3 shows an example of the configuration of the horizontal seal roller 41, FIG. 3A is an overall perspective view, and FIG. 3B is a side view as viewed in the direction of arrow B in FIG. 3A.

  The columnar horizontal sealing roller 41 includes a protruding portion 41P that continuously protrudes along the width direction W indicated by an arrow in FIG. 3A. In this embodiment, the example which has two protrusion part 41P on the surrounding surface of the horizontal seal roller 41 is shown. The two protrusions 41P and 41P are provided point-symmetrically (rotationally symmetric) with the rotation center 41C of the horizontal seal roller 41 as a symmetric point (FIG. 3B). That is, the two protrusions 41P and 41P are provided at positions 180 degrees apart from the rotation center 41C in the circumferential direction. In addition, the number of the protrusion parts 41P provided in the horizontal seal roller 41 is not limited to two illustrated. The horizontal seal roller 41 incorporates a heating device (not shown). At least the surface layer of the protrusion 41P is formed of a material having high thermal conductivity, such as a metal. And the film FL can be heat-sealed by heating the surface layer of the protrusion part 41P with a heat generating apparatus.

  The horizontal sealing rollers 41 and 41 are arranged below the adjustment roller 50 with the cylindrical film body TU filled with the contents CT interposed therebetween (FIG. 2). The lateral seal rollers 41 and 41 are connected to a servo motor (not shown here) as a drive source via a gear or the like. The pair of horizontal sealing rollers 41, 41 are configured to rotate in synchronization with each other in the reverse direction as indicated by the arrows in FIG. The pair of horizontal sealing rollers 41 and 41 are configured to rotate at the same rotational speed in the direction in which the cylindrical film body TU is sandwiched and conveyed downward. Therefore, every time the pair of horizontal sealing rollers 41, 41 rotate approximately half, both projecting portions 41P, 41P come into contact with each other so that the tubular film body TU is sandwiched and heat sealed. That is, intermittent contact between the protruding portions 41P is realized.

  A cutter 60 is disposed below the horizontal seal roller 41. As described above, the cutter 60 is for individually separating a series of sealing bags PD1 formed by the horizontal seal portion 40 at locations where the horizontal seal portion 40 is heat-sealed. Further, another horizontal sealing roller may be provided between the horizontal sealing roller 41 and the cutter 60.

  Next, the configuration of the connecting portion J will be described in detail. FIG. 4 shows an example of the structure of the joint portion J, where A is a cross-sectional view of the joint portion Ja on which the film FL is laminated, B is a cross-sectional view of the joint portion Jb on which the film FL is butt-bonded, and C is 3 is a plan view of a connecting portion J. FIG.

  First, with reference to FIG. 4A, the joint part Ja on which the film FL is laminated is described. The preceding film FLa and the following film FLb are joined with respect to the conveying direction of the film FL. For example, the film FLa is laminated in the order of a polyethylene layer 101a, an adhesive layer 102a, a nylon layer 103a, an adhesive layer 104a, and a polyethylene terephthalate layer 105a. Similarly, the film FLb is laminated in the order of, for example, a polyethylene layer 101b, an adhesive layer 102b, a nylon layer 103b, an adhesive layer 104b, and a polyethylene terephthalate layer 105b.

  The polyethylene layer 101a of the film FLa and the polyethylene terephthalate layer 105b of the film FLb are bonded with a double-sided tape 106. This configuration is preferable because the content CT is less likely to enter between the double-sided tape 106 and the films FLa and FLb when the content CT is filled. The double-sided tape 106 has a width B and is attached over the entire width of the film FLa and the film FLb (from the near side to the far side in FIG. 4A). In the double-sided tape 106, for example, an acrylic adhesive is laminated on both sides of a polyethylene terephthalate film substrate. Thus, a joint portion Ja in which the film FLa, the double-sided tape 106, and the film FLb are laminated is formed. The double-sided tape 106 is most preferably flush with the tips of the films FLa and FLb. However, the ends of the films FLa and FLb may slightly protrude from the double-sided tape 106. In this case, since the adhesive of the double-sided tape 106 does not protrude from the surface of each film FLa, FLb, the conveyance of the film FL is not affected.

  Next, with reference to FIG. 4B, the joint part Jb to which the film FL is abutted and bonded will be described. The film FLc that precedes the transport direction of the film FL and the film FLd that follows are joined. For example, the film FLc is laminated in the order of a polyethylene layer 101c, an adhesive layer 102c, a nylon layer 103c, an adhesive layer 104c, and a polyethylene terephthalate layer 105c. Similarly, the film FLd is laminated in the order of, for example, a polyethylene layer 101d, an adhesive layer 102d, a nylon layer 103d, an adhesive layer 104d, and a polyethylene terephthalate layer 105d.

  A single-sided tape 107 is bonded to the polyethylene terephthalate layer 105c of the film FLc and the polyethylene terephthalate layer 105d of the film FLd. The single-sided tape 107 also has a width B, and is attached over the entire width of the film FLc and the film FLd (from the near side to the far side in FIG. 4B). In the single-sided tape 107, for example, an acrylic pressure-sensitive adhesive is laminated on one side of a polyethylene terephthalate film substrate. In this way, the joint portion Jb in which the single-sided tape 107 is laminated under the film FLc and the film FLd is formed.

  As shown in FIG. 4C, the double-sided tape 106 and the joint portion J having the width B of the single-sided tape 107 over the entire width of the film FL, as shown in FIG. Is formed. Note that the width L of the film FL is, for example, 900 mm.

  The double-sided tape 106 and the single-sided tape 107 function as marks for detecting the joint portion J by the joint portion detecting unit. More preferably, a colored double-sided tape 106 and a single-sided tape 107 are used. As a result, even when a pattern or other mark is printed on the film FL, the joint portion J can be determined. Furthermore, the joint portion J can be discriminated visually. The color of the adhesive tape may be single color. From the viewpoint of adhesive strength and detection accuracy, the width B of the joint portion J is preferably 25 mm or more and less than the length of the individual sealing bag PD2. In the present embodiment, since heat sealing can be surely performed in the vertical seal portion 20, there is no problem even if the width B of the joint portion J is increased. In addition, the joining part J may be in the form of heat welding other than the above-mentioned adhesive tape. Also in that case, it is preferable that the connection part J is colored.

  Note that the film FL used in the present embodiment requires heat sealability in order to make a bag. However, the film FL used in this embodiment is not limited to the above-described configuration. For example, the polyethylene layer may be a polypropylene layer. Furthermore, the polyethylene terephthalate layer may be a polyester layer or a polyamide layer. Further, the intermediate layer may be formed of a single layer or a plurality of layers such as a nylon layer, a polyester layer, a polyamide layer, a polyethylene layer, and an aluminum layer. In the present embodiment, the capacity of the film FL to be used is not selected. The volume of the film used in the present embodiment may be 10 mL, for example, or 5 L, for example.

  The operation of the device for manufacturing a sealed bag according to the present embodiment configured as described above and the method for manufacturing the sealed bag will be described in detail.

  The nip roller NR feeds out the film FL when a servo motor (not shown) as a drive source rotates. The film FL sent out from the original roll R enters the sterilizing section through the opening 3 opened in the shutter 2. Here, the film FL is conveyed upward after being immersed in the sterilizing liquid tank 4 in which the sterilizing agent is stored and sterilized. The film FL is dried by blowing hot air onto both sides thereof from the hot air nozzle 5 and then cooled by blowing cold air onto both sides thereof from the cold air nozzle 6. Then, the film FL is guided downward by the guide roller 11 and conveyed to a portion where bag making and filling of the contents CT are performed (conveying step).

  Then, the film FL guided downward by the guide roller 11 is folded in half by pressing the guide bar 12 (two-folding process). FIG. 5A is a front view as viewed in the direction of the arrow V in FIG. 2 and shows a state of the bi-fold film FL1 between the guide bar 12 and the vertical seal portion 20. The guide bar 12 is pressed from the left side in FIG. 5A to form a folded film FL1, and both side ends T1 and T1 of the folded film FL1 overlap each other on the left side in FIG. 5A.

  A pair of vertical seal rollers 21 and 21 rotate in the opposite direction at the same rotational speed, and heat seal SHS is performed by heating while sandwiching both end portions T1 and T1 of the fold film FL1 (vertical seal process). FIG. 5B is a diagram illustrating a state of the tubular film body TU between the vertical seal portion 20 and the horizontal seal portion 40. The cylindrical film body TU is formed by heat-sealing SHS at the longitudinal seal portion 20 with respect to both end portions T1 and T1 of the bi-fold film FL1. The seal width (protrusion) of the vertical seal roller 21 is only required to allow heat sealing SHS to be performed on both side ends T1, T1 of the bi-fold film FL1, and other than both side ends T1, T1 of the bi-fold film FL1. Is configured not to be heat sealed.

  The content CT is filled from the lower end 31E of the filling nozzle 31 into the tubular film body TU to which the heat seal SHS has been applied (filling step). The contents CT are continuously supplied from the filling nozzle 31.

  6A is an enlarged side view for explaining a state in which the tubular film body TU is heat-sealed by the horizontal sealing rollers 41 and 41, and FIG. 6B is formed by being heat-sealed by the horizontal sealing rollers 41 and 41. It is a front view of a series of sealing bags PD1. The cylindrical film body TU filled with the content CT by intermittently abutting the projecting portions 41P and 41P by rotating the pair of horizontal seal rollers 41 and 41 in the direction indicated by the arrow in FIG. 6A. A heat seal THS (FIG. 6B) is applied across the surface (lateral sealing step).

  By applying the heat seal THS at the horizontal seal portion 40, the tubular film body TU filled with the contents CT is partitioned as a series of sealed bags PD1. As shown in FIG. 6B, the horizontal seal portion 40 is intermittently provided at a constant interval D in the direction perpendicular to the longitudinal direction E (so as to cross the longitudinal direction E) in the tubular film body TU filled with the contents CT. Heat seal THS is performed. The distance D is the length of the individual sealed bag PD2. The interval D is set to 400 mm, for example. The heat seal THS does not necessarily have to be formed in a direction perpendicular to the longitudinal direction E of the tubular film body TU.

  The cutter 60 separates the series of sealing bags PD1 individually at the position where the heat seal THS is applied at the horizontal seal portion 40 (separation process). The series of sealed bags PD1 that have undergone the separation process become products as individual sealed bags PD2. By operating the vertical bag-making aseptic filling machine 1 by the method as described above, individual sealed bags PD2 are continuously manufactured.

  Next, a control system of the sealing bag manufacturing apparatus according to the present embodiment will be described in detail. FIG. 7 is a control block diagram of the main part. The vertical bag making aseptic filling machine 1 used for manufacturing the sealed bag according to this embodiment has a control unit 70. The control unit 70 controls each unit of the vertical bag making aseptic filling machine 1 based on a program stored in a built-in storage unit (not shown).

  As described above, the vertical seal rollers 21 and 21, the horizontal seal rollers 41 and 41, and the nip roller NR are connected to the servo motor 22, the servo motor 42, and the servo motor R1 that rotate them. And the control part 70 controls each servomotor 22,42, and R1. Each of the servo motors 22, 42, and R1 includes encoders 22c, 42c, and Rc, respectively, and servo amplifiers 22b, 42b, and Rb are connected to the servo motors 22, 42, and R1, respectively. Each servo amplifier 22b, 42b, and Rb receives the signal from the control unit 70, and controls each servo motor 22, 42, R1 so that the speed commanded by the control unit 70 is obtained. In this way, the conveyance speed of the film FL of the conveyance unit 10 can be controlled.

  Further, the control unit 70 can obtain the rotational position information of the servo motors 22, 42, and R1 by the encoders 22c, 42c, and Rc. For example, the control unit 70 can recognize the contact start timing and the contact end timing of the protruding portions 41P and 41P of the lateral seal rollers 41 and 41. Therefore, the control unit 70 receives the rotational position signals of the servo motors 22, 42, and R1 from the encoders 22c, 42c, and Rc, and then sets the servo motors 22, 42 so as to have a predetermined speed. , And R1 can also be controlled.

  Here, an example in which the conveyance speed is controlled based on the rotational position information of the horizontal seal rollers 41 and 41 will be described. As described above, the horizontal sealing rollers 41 and 41 are formed with a cycle through which the protruding portion 41P passes every rotation of 180 degrees (see FIG. 3B). The control unit 70 detects the circumferential speed of the vertical seal rollers 21 and 21 from the start of contact of the protrusions 41P and 41P to the end of contact, and the peripheral speed of the nip roller NR (raw roll R) (raw roll). Is controlled so as to be V2 (second speed). During this time, the horizontal sealing rollers 41 and 41 are synchronized with the vertical sealing rollers 21 and 21 and the original roll R, and the circumferential speed thereof is V2.

  On the other hand, the control unit 70 performs the vertical operation from the end of contact of the protrusions 41P and 41P to the start of the next contact (that is, while the protrusions 41P and 41P of the lateral seal rollers 41 and 41 do not contact each other). The circumferential speeds of the seal rollers 21 and 21 and the raw roll R are controlled to be V1 (first speed) different from V2 (V1 ≠ V2). During this time, the circumferential speed of the horizontal sealing rollers 41, 41 is maintained at V2.

  Note that the circumferential speed V2 of the vertical sealing rollers 21 and 21 and the raw roll R can be changed to the circumferential speed V1 while maintaining the circumferential speed V2 of the horizontal sealing rollers 41 and 41 in this way. When the projecting portions 41P and 41P of the horizontal seal rollers 41 and 41 do not come into contact with each other, a gap is formed between the peripheral surfaces of the horizontal seal rollers 41 and 41, and the periphery of the horizontal seal rollers 41 and 41 is formed in the gap. This is because the cylindrical film body TU can be conveyed at the speed V1 without touching the surface. Note that the circumferential speed of the lateral seal rollers 41 and 41 is V2 while the protrusions 41P and 41P are in contact, and V1A (V1A) from the end of contact of the protrusions 41P and 41P to the start of the next contact. ≠ V2) may be controlled. At this time, the circumferential speed V1 of the vertical sealing rollers 21 and 21 and the raw fabric roll R and the circumferential speed V1A of the horizontal sealing rollers 41 and 41 may be the same (V1 = V1A), which are different. (V1 ≠ V1A).

  Since the motor 22, the motor 42, and the motor R1 require time for acceleration / deceleration, the circumferential speeds of the vertical seal rollers 21 and 21 and the original fabric roll R are V1. The protrusions 41P and 41P are shorter than the time when the protrusions 41P do not contact each other.

  Then, for example, while the protrusions 41P and 41P of the horizontal seal rollers 41 and 41 are not in contact with each other, the circumferential speed of the vertical seal rollers 21 and 21 and the raw roll R is increased to V1, so that the films FL and 2 The conveyance speed of the folded film FL1, the tubular film body TU, and the series of sealed bags PD1 can be increased, and the efficiency of manufacturing the sealed bags can be increased. On the other hand, for example, while the protrusions 41P and 41P of the horizontal sealing rollers 41 and 41 are not in contact with each other, the circumferential speeds of the vertical sealing rollers 21 and 21 and the raw fabric roll R are reduced to V1, so that various It can respond to manufacture of the sealing bag in the space | interval (pitch) of a horizontal seal. Thus, according to the control method of the manufacturing apparatus of the sealing bag which concerns on this embodiment, the change of the magnitude relationship between V1 (1st speed) mentioned above and (V2) 2nd speed can be selected.

  The filling unit 30 includes a pump 32 and an adjustment switch 33. The control unit 70 can switch the operation and stop of the pump and the discharge amount by controlling the adjustment switch 33.

  A detection signal of the joint J by the color sensor 80 is output to the control unit 70. Then, a detection signal from the rotary encoder 92 that measures the displacement of the rotation of the conveying roller 91 of the distance measuring unit 90 is also output to the control unit 70. Therefore, the control unit 70 receives the detection signal of the connecting portion J from the color sensor 80 and based on the transport distance of the film FL input from the rotary encoder 92, the transport speed of the film FL of the transport unit 10 and the filling unit 30. Can be controlled.

  Next, an example of operation | movement at the time of the detection of the connection part J which concerns on manufacture of the sealing bag of this embodiment is demonstrated in detail. FIG. 8 is a flowchart for explaining the operation when the joint portion J is detected.

  First, during operation of the vertical bag making aseptic filling machine 1, the color sensor 80 measures the color of the film FL being conveyed, and the control unit 70 determines whether or not the connecting portion J has been detected (step). S1). When the joint portion J is not detected (step S1: No), the detection of the joint portion J is continued.

  When the joint portion J is detected (step S1: Yes), the control unit 70 sets the transport (movement) distance of the film FL to 0 (step S2).

  Next, the control unit 70 receives a signal from the distance measuring unit 90 and determines whether or not the transport distance of the film FL is larger than the first distance (the transport distance of the film FL> the first distance). (Step S3). When the transport distance of the film FL is not greater than the first distance (step S3: No. transport distance of the film FL ≦ first distance), the film is transported until the transport distance of the film FL becomes greater than the first distance. Measurement of FL transport distance continues. Here, the first distance is a distance from when the joint portion J of the film FL is detected to the vertical seal portion 20 (immediately before being heat sealed by the vertical seal process). Even if the joint portion J is detected, normal operation can be performed until immediately before being transferred to the vertical seal portion 20, so that waste can be eliminated and the efficiency of manufacturing the sealed bag can be improved.

  The first distance may be set to a shorter distance in view of safety. This distance can be measured in advance, and can be set by adjusting the value depending on the situation. The first distance is set to 4970 mm, for example.

  When the conveyance distance of the film FL is larger than the first distance (step S3: Yes), the control unit 70 outputs a control signal to each unit such as the conveyance unit 10 to reduce the machine operation speed from the standard speed. (Step S4). Since the conveyance speed of the film FL becomes low, a sufficient time is allowed for the connecting portion J of the film FL to pass through the vertical seal portion 20 to ensure heat sealing. Here, the machine operation speed is not limited to the conveyance speed (roller rotation speed) of the conveyance unit 10, and may include the filling speed of the filling unit 30, the rotation speed of the cutter 60, and the like. The loss amount of the film FL and the content CT is suppressed, and the efficiency of manufacturing the sealed bag can be improved.

  The transport speed of the film FL is preferably 40% or less, more preferably 30% or less at a low speed, with respect to the standard speed of 8 to 20 m / min. For example, when the standard speed is 8 m / min, the low speed may be set to 2 m / min. For example, when the standard speed is 20 m / min, the low speed may be set to 7 m / min.

  Next, the control unit 70 outputs a control signal to the filling unit 30 to stop filling (step S5). Although the filling rate may be reduced without completely stopping the filling, it is preferable to stop the filling. The loss amount of the film FL and the content CT is further suppressed, and the efficiency of manufacturing the sealed bag can be further improved.

  Next, the control part 70 receives the signal from the distance measurement part 90, and determines whether the connection part J passed the vertical seal | sticker part 20 (step S6). This is equivalent to determining whether or not the transport distance of the film FL is greater than the second distance (the transport distance of the film FL> the second distance). If the transport distance of the film FL is not greater than the second distance (step S6: No. transport distance of the film FL ≦ second distance), the film is transported until the transport distance of the film FL becomes greater than the second distance. Measurement of FL transport distance continues. Here, the second distance is a distance through which the joint portion J of the film FL passes through the vertical seal portion 20. The second distance may be set to a longer distance in view of safety. That is, the second distance may be set in a range including before and after the vertical seal portion 20. This distance can also be measured in advance, and can be set by adjusting the value depending on the situation. The second distance is set to 100 mm, for example.

  When the conveyance distance of the film FL is larger than the second distance (step S6: Yes), the control unit 70 outputs a control signal to each unit such as the conveyance unit 10 and the filling unit 30 to output the machine operation speed. Is returned to the standard speed to start filling (step S7).

  After that, the filling product including the joint portion J and the filling products before and after that are excluded (step S8). In addition, you may be set as the structure which excludes an applicable filling product automatically in the discharge part of the vertical bag-making aseptic filling machine 1 (discharge process). The time and labor required for selecting the corresponding filled product can be suppressed, and the efficiency of manufacturing the sealed bag can be further improved.

  In addition, you may be set as the structure which stops the isolation | separation process with respect to the filling goods in which the connection part J was contained in the back | latter stage of step S6, and the filling goods before and behind that. The filled product including the joint portion J and the filled product before and after the bundled portion J are gathered, so that the time and labor for sorting can be suppressed, and the efficiency of manufacturing the sealed bag can be further improved. On the other hand, when the accuracy of the filling amount of the contents CT contained in the individual sealed bag PD2 when the machine operation speed is changed to a low speed is ensured, the connection part J is included in the exclusion target. It is good only as a filling product.

  In the present embodiment, when the color sensor 80 detects the joint portion J by the joint portion detection process, the film FL until the transport distance measured by the distance measurement section 90 reaches a predetermined distance. This is characterized in that the transport speed of the motor is changed to a low speed slower than the standard speed. However, as in the example of the operation described above, the predetermined distance may include the first distance and the second distance separately. The section where the conveyance speed of the film FL is changed to a low speed slower than the standard speed can be limited to the section where the connecting portion J passes through the vertical seal portion 20, and the efficiency of manufacturing the sealing bag can be further improved.

  The individual sealed bag PD2 thus manufactured is shown in the perspective view of FIG. 9A and FIG. 9B, which is a cross-sectional view taken along arrow B in FIG. 9A. The individual sealing bag PD2 includes a heat seal SHS at one end and a heat seal THS at the upper and lower ends. The individual sealing bag PD2 includes the content CT therein.

  Furthermore, as shown in FIG. 10B, which is a perspective view of FIG. 10A and a cross-sectional view taken along arrow B in FIG. 10A, the individual sealing bag PD2 is also heat-sealed to the folded portion BN at the center of the film FL. It may be an individual sealed bag PD2a configured to be subjected to SHS. The heat seal SHS applied to the folded portion BN may be formed by disposing an apparatus having the same configuration as that of the vertical seal portion 20.

  As described above, in the sealed bag manufacturing method and the sealed bag manufacturing apparatus according to this embodiment, the operation of the vertical bag-making aseptic filling machine 1 is changed when the connecting portion J passes through the vertical seal portion 20 in particular. As the control was changed, continuous filling became possible. In the present embodiment, when the connecting portion J is detected by the color sensor 80, the transport speed of the film FL until the transport distance measured by the distance measuring section 90 reaches a predetermined distance is set to a standard speed. It is also characterized by changing to a slower slow speed. As a result, it is possible to lengthen the time for heat sealing, particularly in the vertical seal portion 20, with respect to the joint portion J, and the joint portion J is reliably heat-sealed.

  According to this embodiment, it is possible to seal the joint portion J of the packaging material, and there is no need to stop the operation of the vertical bag making aseptic filling machine 1. Therefore, the efficiency of manufacturing the sealed bag is improved. The packaging material is not removed from the apparatus (there is no need to replace the packaging material), and the connecting portion J is also reliably heat-sealed, so that the content CT does not leak out of the packaging material. For this reason, while being able to keep the quality of a product high, propagation of miscellaneous bacteria etc. is stopped and safety can be improved. Further, in the present embodiment, when the filling of the content CT is stopped, the film FL is transported at a low speed, so that it is not easily affected by dripping from the nozzles accompanying the stop. Therefore, it is possible to reduce the loss amount of the contents CT that are not products and the packaging material. Furthermore, according to the present embodiment, since the conveyance is not stopped, the amount when the filling is restarted is quickly stabilized. Therefore, it is possible to reduce the loss amount of the contents CT that are not products and the packaging material. And the effect of the loss reduction of this embodiment becomes more remarkable, so that the content CT is expensive.

  The principal part side view of the vertical bag making aseptic filling machine 110 which concerns on 2nd Embodiment is shown in FIG. In addition, about the part which is common in the above-mentioned 1st Embodiment in this 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Unlike the vertical bag making aseptic filling machine 1, the vertical bag making aseptic filling machine 110 is supplied with films FLt and FLt from two raw rolls (not shown). Therefore, the guide bar 12 that is a folded portion is not required. And since the both ends of two films FLt and FLt are bonded together, the structure of the vertical seal | sticker part 120 differs. In addition, two guide rollers 111 and 111 for guiding the two films FLt and FLt, respectively, are arranged instead of the guide roller 11. The two films FLt and FLt form a tubular film body TUt, a series of sealing bags PD1t, and individual sealing bags PD2t having a four-way seal configuration. Other configurations are the same as those in the example of FIG.

  The vertical bag making aseptic filling machine 110 is configured such that films FLt and FLt are supplied from the left and right in FIG. Further, the supply directions of the films FLt and FLt are different from those in the example of FIG. Therefore, the rotation center of the guide rollers 111 and 111 is also a direction extending from the near side to the far side in FIG. Further, in the second embodiment, since both sides of the two films FLt and FLt are bonded together by the vertical seal portion 120 to form the sealed bag PD2t, the width of each film FLt and FLt is the same as that of the film FL in FIG. Compared to that, it is about half.

  The vertical seal portion 120 is a heat seal by overlapping two films FLt and FLt and overlapping both end portions thereof. Therefore, the vertical bag making aseptic filling machine 110 includes a pair of vertical seal rollers 121 and 121 and vertical seal rollers 121a and 121a on the left and right sides of the two superimposed films FLt and FLt, respectively. As in the first embodiment, the vertical seal rollers 121 and 121 and the vertical seal rollers 121a and 121a are configured to rotate in synchronization with each other via a gear (not shown) and a servo motor, respectively, and the film FLt Then, heat sealing is performed while sandwiching both end portions of FLt.

  Also in the configuration of the second embodiment, while the protrusions 41P and 41P of the horizontal sealing rollers 41 and 41 are in contact with each other, the circumferential speed of the vertical sealing rollers 121 and 121 and the vertical sealing rollers 121a and 121a, and the raw roll The circumferential speeds of the films FLt and FLt, and the circumferential speeds of the lateral seal rollers 41 and 41 are controlled to V2. At the same time, the circumferential speed of the vertical seal rollers 121 and 121 and the vertical seal rollers 121a and 121a and the circumferential speed of the original roll are from the end of contact of the protrusions 41P and 41P to the start of the next contact. That is, the conveyance speed of the films FLt and FLt is controlled to V1 (V1 ≠ V2, for example, V1> V2). Thereby, even when two films FLt and FLt are used, the same operation and effect as in the first embodiment can be obtained.

  The principal part side view of the vertical bag making aseptic filling machine 210 which concerns on 3rd Embodiment is shown in FIG. In the vertical bag making aseptic filling machine 210 according to the third embodiment, a horizontal seal unit 240 including horizontal heat sealers 241 and 241 using a box motion is arranged instead of the horizontal seal rollers 41 and 41 according to the first embodiment. By using the box motion, it is possible to secure a sufficient time for transverse heat sealing. Other configurations and operations are the same as those in the first embodiment.

  The horizontal seal portion 240 includes horizontal heat sealers 241 and 241 facing each other. Protruding portions 241P and 241P are provided on the opposing surfaces of the horizontal heat sealers 241 and 241, respectively. Each of the horizontal heat sealers 241 and 241 includes an air cylinder (not shown) and a servo motor. The air heat sealers 241 and 241 are linearly moved left and right in FIG. Yes. In the initial position, the horizontal heat sealers 241 and 241 are arranged so that the two protruding portions 241P and 241P come into contact with each other, and the two protruding portions 241P and 241P heat the cylindrical film body TU in the width direction. Seal THS (see FIG. 6B) is applied. In this state, after moving for a certain time in the conveying direction of the tubular film body TU, the horizontal heat sealers 241 and 241 are left and right away from the tubular film body TU and then moved upward, and then the initial position described above. Return to.

  Also in the configuration of the third embodiment, while the projecting portions 241P and 241P of the horizontal heat sealers 241 and 241 are in contact with each other, the circumferential speed of the vertical seal rollers 21 and 21, the transport speed of the film FL, and the horizontal heat sealer 241 are used. 241 and the lowering speed of 241 are controlled to V2. At the same time, the circumferential speed of the vertical seal rollers 21 and 21 and the conveyance speed of the film FL are V1 (V1 ≠ V2, for example, from the end of contact of the protrusions 241P and 241P to the start of the next contact. V1> V2). Thereby, the same operation and effect as the first embodiment and the second embodiment can be obtained.

  The principal part side view of the vertical bag making aseptic filling machine 310 which concerns on 4th Embodiment is shown in FIG. The vertical bag making aseptic filling machine 310 shown in FIG. 13 has a configuration in which a horizontal seal portion 240 including box motion type horizontal heat sealers 241 and 241 is arranged instead of the horizontal seal rollers 41 and 41 of the second embodiment. It is. Other configurations and operations are the same as those of the second embodiment shown in FIG. And the horizontal seal | sticker part 240 is the same as that of what was demonstrated in 3rd Embodiment of FIG. Accordingly, even when two films FLt and FLt are used, it is possible to secure a sufficient time for the transverse heat sealing.

  In addition to all the above-described examples, the manufacturing method of the sealed bag of the present disclosure can also be manufactured by a back-sticking seal. The manufacturing method of the back-sealed seal type sealing bag is the same as the bag-making guide process in which the film continuously fed from the raw roll is rounded in the width direction into a cylindrical shape and the inner sides of both sides of the film are aligned. A vertical sealing process in which both sides of the film are heat sealed to form the film into a cylindrical tubular film body, and a tilting in which the vertically sealed vertical seal portion is brought down to either side and close to the side surface of the cylindrical film body A process, a filling process for filling the contents inside the tubular film body, and a horizontal sealing process for intermittently heat-sealing the tubular film body filled with the contents in a direction perpendicular to the longitudinal direction. Prepare. In this horizontal sealing step, the horizontal seal is also applied together with the vertical seal portion that has been tilted in the tilting step.

  Furthermore, the manufacturing method of the back-sealed seal type sealing bag is a horizontal sealing step after the tubular film body filled with the contents is separated as a series of sealing bags by heat sealing in the horizontal sealing step. And a separation step of individually separating the sealing bag at the heat-sealed portion. In the vertical sealing step, a pair of vertical sealing rollers heat-seal with both side edges of the film sandwiched while rotating. In the horizontal sealing step, the pair of horizontal sealing rollers have protrusions continuously along the width direction on the respective surfaces, and when the pair of horizontal sealing rollers rotate, the protrusions intermittently abut each other to form a cylinder. Heat seal across the film body.

  And while the protrusion part of a horizontal seal roller does not contact | abut, each of the conveyance speed of the film sent out from an original fabric roll, the circumferential speed of a vertical seal roller, and the circumferential speed of a horizontal seal roller is 1st. Controlled to be speed. On the other hand, while the protruding portions of the horizontal seal roller are in contact with each other, the conveyance speed of the film fed from the raw roll, the circumferential speed of the vertical seal roller, and the circumferential speed of the horizontal seal roller are each the second speed. It is controlled to become. The first speed is controlled to be different from the second speed. As a result, the same operations and effects as those of the first embodiment described above can be obtained.

  For all the above examples, when the connecting portion J is detected by the color sensor 80, the transport speed of the film FL until the transport distance measured by the distance measuring section 90 reaches a predetermined distance. It is possible to apply a method of changing to a low speed slower than the standard speed. And in all the examples, it can be set as the manufacturing method of the sealing bag which is efficient, has high quality, and safety.

  Hereinafter, the present invention will be described in more detail and specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

[Example 1]
(material)
As a packaging material, polyethylene of 70 μm thickness, nylon of 25 μm thickness, and polyethylene terephthalate of 12 μm thickness are laminated via an adhesive layer of 3 μm thickness from the inner layer side sealed by the vertical seal part. Film was used. The connecting portion was formed by a method in which a polyethylene film of one film and a polyethylene terephthalate film of the other film were bonded with a double-sided tape (No. 5606 black manufactured by Nitto Denko). The double-sided tape was obtained by laminating an acrylic pressure-sensitive adhesive on both sides of a polyethylene terephthalate film substrate, and its thickness was 60 μm. The double-sided tape was affixed over the entire width of the film (900 mm) in the direction perpendicular to the conveyance direction with 40 mm in the film conveyance direction. In addition, water, soft mix, and shake mix were used as the contents.

(Method)
The method according to the present invention was performed. In other words, when a connection part is detected by the connection part detection process, the film conveyance speed until the conveyance distance measured by the distance measurement process reaches a predetermined distance is changed to a lower speed than the standard speed. It was done. The standard speed of the film was 8 m / min, and the film was transported at a low speed of 2 m / min during 100 mm when the film passed in the vicinity of the vertical seal portion. While the film was at a low speed, the filling of the contents in the filling section was also controlled to stop. Immediately after the film passed through the vicinity of the vertical seal portion, the conveyance speed of the film was set to 8 m / min, which is the standard speed. When the film was returned to the standard speed, control was performed so that the filling amount of the contents in the filling portion was returned to normal. The interval (pitch) between the horizontal seals was 400 mm. The content of one product bag was 5 kg.

(result)
When the joint portion passed in the vicinity of the vertical seal portion, the film conveyance speed was low, so that the joint portion was reliably sealed. And the content that was not a product was only 15kg. On the other hand, the film that was not a product was only 1.2m. This was fit in 3 bags because the distance between the horizontal seals was 400 mm. In normal business, the contents are inspected before and after the connecting portion. That is, the contents are used for inspection of two of the above three bags. Therefore, the content actually discarded is 5 kg. However, since the contents of 5 kg are securely sealed by the method according to this embodiment, they can be used as recycled products. Therefore, according to the method according to the present embodiment, the contents are not wasted.

[Comparative Example 1]
(material)
Similar to Example 1.

(Method)
When the joint portion was detected by the joint portion detection step, the filling machine was stopped. After the joint was removed (the original fabric was replaced), the filling machine was restarted. Other conditions were the same as in Example 1. That is, the film conveyance speed was 8 m / min, the distance (pitch) between the horizontal seals was 400 mm, and the inner volume of one product bag was 5 kg.

(result)
The content that is not a product weighed 40 kg. On the other hand, the film which is not a product ranged from 8 m to 10 m. This was 20 bags because the distance between the horizontal seals was 400 mm. As described above, in normal business, the contents are inspected before and after the connecting portion, and therefore, the contents of the two bags are not used as products but are used for inspection.

The following points were derived from the examples described above.
From the results of Example 1 and Comparative Example 1, in Example 1, the amount of discarded film was suppressed from 8 to 10 m to 1.2 m. Furthermore, in Example 1, the waste amount of the contents was suppressed from 40 kg to 5 kg. In Example 1, compared with Comparative Example 1, the amount of discarded film was suppressed to 12% to 15%, and the amount of discarded content was suppressed to 12.5%.

  In Comparative Example 1, as a property of the machine, there is a time delay from the operation of stopping the filling of the contents to the actual stop, dripping from the nozzle of the filling portion, and the amount after the resumption of filling. This was due to the fact that several bags were required to stabilize.

  On the other hand, in Example 1, there is a time delay from the operation of stopping the filling of the contents to the actual stop, and even if dripping occurs from the nozzle of the filling portion, the film conveyance speed is lowered. In the meantime, it was difficult to be affected by the mechanical structure because it was possible to earn time until the filling of the contents was stopped. Furthermore, in Example 1, the filling machine was not stopped when passing through the connecting portion, and after passing through the connecting portion, the film transport speed was only returned from the low speed to the standard speed. Immediately stable.

  Further, in Comparative Example 1, it took time and labor to select a sealed bag that would not be a product, and the production of the sealed bag was interrupted while the filling machine was stopped, and the efficiency of manufacturing the sealed bag was reduced. For example, if the interruption per time is 5 minutes and the number of exchanges of the raw material per day is 12, the production of the sealed bag is interrupted for 1 hour per day.

  On the other hand, in Example 1, since there were few sealed bags that were not products, little time and labor were required for sorting, and the filling machine did not stop, so the efficiency of manufacturing sealed bags was improved.

  From the examples described above, the method for manufacturing a sealed bag according to the present embodiment suppresses the waste amount of both the contents and the packaging material, and labor when the connecting portion passes in the manufacturing stage of the sealed bag, and It has been shown to save time and be efficient.

  The present disclosure can be suitably used for a vertical bag making aseptic filling machine. However, the present disclosure is not limited to the above-described embodiments and examples, and can be applied to any filling device including not only an aseptic filling machine at normal temperature but also a warming filling machine. Furthermore, the present disclosure is not limited to foods with respect to the contents to be filled. For example, for filling liquids and powders, including medical and other uses other than foods such as physiological saline. Can be applied.

1, 110, 210, 310 Vertical bag-making aseptic filling machine 10 Transport unit 12 Guide bar (folded part)
20, 120 Vertical seal portion 21, 121, 121a Vertical seal roller 30 Filling portion 31 Filling nozzle 40, 240 Horizontal seal portion 41 Horizontal seal roller 241 Horizontal heat sealer 41P, 241P Protruding portion 50 Adjustment roller 60 Cutter (separation portion)
70 Control unit 80 Color sensor (connector detection unit)
90 Distance measurement part CT Contents FL, FLa, FLb, FLc, FLd, FLt Film J, Ja, Jb Joint part NR Nip roller PD1, PD1t A series of sealed bags PD2, PD2a, PD2t Individual sealed bags R Original roll T1 side End TU, TUt Tubular film body V1, V1A First speed (circumferential speed)
V2 Second speed (circumferential speed)

Claims (13)

A conveying step of continuously sending the film from the raw roll,
A vertical sealing step of heat-sealing the side edge of the film conveyed downward by the conveying step; and
A filling step of filling the contents inside the cylindrical film body formed into a cylindrical shape by the vertical sealing step;
A transverse sealing step of intermittently heat-sealing the tubular film body filled with the contents by the filling step so as to cross the direction of conveyance;
In a manufacturing method of a sealed bag comprising: a series of sealed bags formed by the transverse sealing step, and a separation step of individually separating the sealed bags at the location heat-sealed in the transverse sealing step,
A connecting portion detecting step for detecting a connecting portion of the film;
A distance measuring step for determining the transport distance of the film,
When the connecting portion is detected by the connecting portion detecting step, the film transport speed until the transport distance measured by the distance measuring step reaches a predetermined distance is slower than the standard speed. A method for producing a sealed bag, characterized by changing to a low speed. The method for manufacturing a sealed bag according to claim 1, wherein a speed at which the content is filled is reduced in the filling step while the transport speed is changed to the low speed. The method for manufacturing a sealed bag according to claim 2, wherein the filling step of filling the contents is stopped while the conveyance speed is changed to the low speed. In the subsequent stage of the separation step, the sealing bag with the connecting portion including the connecting portion of the sealing bag, and the sealing bag before and after the connecting bag with the connecting portion are selected from the other sealing bags. The method for manufacturing a sealed bag according to any one of claims 1 to 3, further comprising a discharging step. The method for manufacturing a sealed bag according to claim 4, wherein the separation step of individually separating the heat-sealed portions in the lateral sealing step at both ends of the sealing bag with the joint portion is stopped. The predetermined distance includes a first distance and a second distance;
The first distance is from a position at which the joint portion is detected by the joint detection process to a position immediately before the film is heat-sealed by the vertical sealing process.
The second distance is a distance that passes when the connecting portion is heat-sealed by the vertical sealing step.
6. The method for manufacturing a sealed bag according to claim 1, wherein at least the conveyance speed of the film is changed to a low speed slower than a standard speed during the second distance. The manufacturing method of the sealing bag according to claim 1, wherein the film is marked with a mark indicating the connecting portion. Further comprising a bi-folding step of bi-folding the film fed from the raw fabric roll,
8. The tubular film according to claim 1, wherein the cylindrical film is heat-sealed by overlapping both side ends of the films that overlap each other in the bi-folding process in the vertical sealing process. A manufacturing method of a sealed bag. Having two of the films fed from the two raw rolls,
The sealed bag according to any one of claims 1 to 7, wherein the cylindrical film is formed by heat-sealing two opposite ends of the two films facing each other by the vertical sealing step. Production method. While not being heat-sealed by the horizontal sealing step, the conveyance speed is controlled to be the first speed,
While being heat-sealed by the horizontal sealing step, the conveyance speed is controlled to be the second speed,
The method for manufacturing a sealed bag according to any one of claims 1 to 9, wherein the first speed is different from the second speed. Each of the pair of heat sealers to be heat-sealed in the horizontal sealing step has a protrusion, and when the pair of heat sealers rotate, the protrusions intermittently come into contact with each other and heat-seal with the tubular film body interposed therebetween. The manufacturing method of the sealing bag of any one of Claim 1 thru | or 10 characterized by these. Each of the pair of heat sealers to be heat-sealed in the transverse sealing step has a protruding portion, and the cylindrical film is rotated by a box motion in which the protruding portions are always opposed to each other with the cylindrical film body being opposed to each other. The manufacturing of the sealed bag according to any one of claims 1 to 10, wherein the projecting parts move while contacting each other while being moved, and heat-sealed with the cylindrical film body interposed therebetween. Method. A transport section for continuously feeding the film from the raw roll,
A vertical seal part that heat-seals the side edges of the film conveyed downward by the conveyance unit;
A filling portion for filling the contents into a cylindrical film body formed into a cylindrical shape by the vertical seal portion;
A transverse seal portion that intermittently heat-seals the tubular film body filled with the contents by the filling portion so as to cross the direction of conveyance;
In a sealed bag manufacturing apparatus, comprising: a separation unit that individually separates a series of sealed bags formed by the lateral seal portion at a location heat-sealed by the lateral seal portion;
A connecting part detecting unit for detecting a connecting part of the film;
A distance measuring unit for determining the transport distance of the film,
When the connection part is detected by the connection part detection unit, the film conveyance speed until the conveyance distance measured by the distance measurement unit reaches a predetermined distance is slower than the standard speed. A device for manufacturing a sealed bag, characterized by changing to a low speed.

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